In automated production processes grasping devices play a crucial role in the handling of many parts, components and products. The presentation starts with a grasping framework: a classification of grasping phases, describes how different principles are adopted at different scales in different applications and continues explaining different releasing strategies and principles. Then the presentation illustrates the numerous sensors used to monitor the effectiveness of grasping (part presence, exchanged force, stick-slip transitions, etc.). Later the grasping and releasing problems in different fields (from mechanical assembly to disassembly, from aerospace to food industry, from textile to logistics) are discussed. Finally, the most recent research is reviewed in order to show the new trends in grasping that provide an outlook on the future of both industrial grippers and robotic hands in automated production processes.
Adhesion is one of the significant parameter which leads to mechanical wear. This presemntation gives brief information about adhesion, molecular interaction between two mating surfaces and factors affecting adhesion. Study of interfacial forces between mating surfaces helps in selection of surface materials to prevent adhesion. Failure of lubricant’s basic function relates to failure of separation of two surfaces which results in adhesion between sliding surfaces. Adhesion is not observed between two surfaces casually placed together due to existing oxide film and contaminants. Surface energy, reduced roughness, high hardness can depress adhesion.
Thermal testing, thermo mechanical and dynamic mechanical analysis & chem...Dr.S.Thirumalvalavan
Unit-V: THERMAL TESTING, THERMO-MECHANICAL AND DYNAMIC MECHANICAL ANALYSIS & CHEMICAL TESTING [OTHER TESTING].
Subject Name: OML751 Testing of Materials
Topics: Thermal Testing: Differential scanning calorimetry, Differential thermal analysis. Thermo-mechanical and Dynamic mechanical analysis: Principles, Advantages, Applications. Chemical Testing: X-Ray Fluorescence, Elemental Analysis by Inductively Coupled Plasma-Optical Emission Spectroscopy and Plasma-Mass Spectrometry.
B.E. Mechanical Engineering
Final Year, VII Semester, Open Elective Subject
[As per Anna University R-2017]
This document discusses various methods for characterizing the surface properties of materials, including contact angle, infrared spectroscopy, atomic force microscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, nuclear magnetic resonance spectroscopy, and Raman spectroscopy. It provides examples of how these techniques can be used to examine properties like surface energy, morphology, structure, composition, and bonding at material surfaces and in near-surface regions.
Epitaxial deposition is a method for growing high quality crystalline films on crystalline substrates. There are two main types: homoepitaxy, where the film and substrate are the same material, and heteroepitaxy, where they differ. Key parameters that affect the epitaxial growth process include temperature, pressure, and reactant flow. Common techniques include vapor phase epitaxy, liquid phase epitaxy, and molecular beam epitaxy, each with their own advantages and disadvantages for producing films for semiconductor and optoelectronic devices.
This document discusses creep failure, which is the slow, time-dependent deformation of materials under constant stress, especially at high temperatures. It defines key creep terms and concepts, including the classic creep curve with primary, secondary, and tertiary creep stages. The main creep mechanisms are described as bulk diffusion, grain boundary diffusion, and dislocation climb/creep. Creep failure occurs through the nucleation and growth of cracks and cavities. Methods to prevent creep failure include using single crystal materials, solid solution strengthening, high melting temperature alloys, and consulting creep test data for lifetime expectations under loading conditions.
For free download Subscribe to https://www.youtube.com/channel/UCTfiZ8qwZ_8_vTjxeCB037w and Follow https://www.instagram.com/fitrit_2405/ then please contact +91-9045839849 over WhatsApp.
Graphene Presentation
This document discusses fundamentals of abrasive wear. It defines wear as the undesirable removal of material from surfaces in contact. It identifies the main categories and mechanisms of wear, focusing on abrasive wear. Abrasive wear occurs when harder particles or surfaces cut or tear away softer material. The document outlines different modes of abrasive wear and factors that influence it, such as relative hardness and surface properties. It also describes testing methods used to study abrasive wear behavior between materials.
The document summarizes research on reinforcing metals and polymers with graphene. Graphene has desirable properties including high strength and conductivity. The researchers produced aluminum-graphene and PDMS-graphene composites using powder metallurgy and solvent mixing. Tensile tests showed the composites had higher strength and flexibility than the base materials alone. Further work is needed to fully characterize the composites and explore applications like microfluidics.
Adhesion is one of the significant parameter which leads to mechanical wear. This presemntation gives brief information about adhesion, molecular interaction between two mating surfaces and factors affecting adhesion. Study of interfacial forces between mating surfaces helps in selection of surface materials to prevent adhesion. Failure of lubricant’s basic function relates to failure of separation of two surfaces which results in adhesion between sliding surfaces. Adhesion is not observed between two surfaces casually placed together due to existing oxide film and contaminants. Surface energy, reduced roughness, high hardness can depress adhesion.
Thermal testing, thermo mechanical and dynamic mechanical analysis & chem...Dr.S.Thirumalvalavan
Unit-V: THERMAL TESTING, THERMO-MECHANICAL AND DYNAMIC MECHANICAL ANALYSIS & CHEMICAL TESTING [OTHER TESTING].
Subject Name: OML751 Testing of Materials
Topics: Thermal Testing: Differential scanning calorimetry, Differential thermal analysis. Thermo-mechanical and Dynamic mechanical analysis: Principles, Advantages, Applications. Chemical Testing: X-Ray Fluorescence, Elemental Analysis by Inductively Coupled Plasma-Optical Emission Spectroscopy and Plasma-Mass Spectrometry.
B.E. Mechanical Engineering
Final Year, VII Semester, Open Elective Subject
[As per Anna University R-2017]
This document discusses various methods for characterizing the surface properties of materials, including contact angle, infrared spectroscopy, atomic force microscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, nuclear magnetic resonance spectroscopy, and Raman spectroscopy. It provides examples of how these techniques can be used to examine properties like surface energy, morphology, structure, composition, and bonding at material surfaces and in near-surface regions.
Epitaxial deposition is a method for growing high quality crystalline films on crystalline substrates. There are two main types: homoepitaxy, where the film and substrate are the same material, and heteroepitaxy, where they differ. Key parameters that affect the epitaxial growth process include temperature, pressure, and reactant flow. Common techniques include vapor phase epitaxy, liquid phase epitaxy, and molecular beam epitaxy, each with their own advantages and disadvantages for producing films for semiconductor and optoelectronic devices.
This document discusses creep failure, which is the slow, time-dependent deformation of materials under constant stress, especially at high temperatures. It defines key creep terms and concepts, including the classic creep curve with primary, secondary, and tertiary creep stages. The main creep mechanisms are described as bulk diffusion, grain boundary diffusion, and dislocation climb/creep. Creep failure occurs through the nucleation and growth of cracks and cavities. Methods to prevent creep failure include using single crystal materials, solid solution strengthening, high melting temperature alloys, and consulting creep test data for lifetime expectations under loading conditions.
For free download Subscribe to https://www.youtube.com/channel/UCTfiZ8qwZ_8_vTjxeCB037w and Follow https://www.instagram.com/fitrit_2405/ then please contact +91-9045839849 over WhatsApp.
Graphene Presentation
This document discusses fundamentals of abrasive wear. It defines wear as the undesirable removal of material from surfaces in contact. It identifies the main categories and mechanisms of wear, focusing on abrasive wear. Abrasive wear occurs when harder particles or surfaces cut or tear away softer material. The document outlines different modes of abrasive wear and factors that influence it, such as relative hardness and surface properties. It also describes testing methods used to study abrasive wear behavior between materials.
The document summarizes research on reinforcing metals and polymers with graphene. Graphene has desirable properties including high strength and conductivity. The researchers produced aluminum-graphene and PDMS-graphene composites using powder metallurgy and solvent mixing. Tensile tests showed the composites had higher strength and flexibility than the base materials alone. Further work is needed to fully characterize the composites and explore applications like microfluidics.
The document discusses various techniques for manufacturing composites, including hand layup, pultrusion, resin transfer molding, and injection molding. It provides details on the hand layup process, describing how dry fibers and resins are layered by hand in an open mold. Pultrusion is defined as a continuous process that pulls reinforced fibers through a resin bath and heated die to produce cured, constant cross-section parts. Resin transfer molding involves packing dry fibers into a mold, injecting resin under pressure, and curing the mold to produce complex, net-shape parts in medium volumes. Each technique has advantages for certain applications in industries like aerospace, transportation, and construction.
This presentation contains the basics of the composites, types of the composites and the processing of the composites or we can say that manufacturing of the composites. This presentation can also help who are working on the de-lamination of the laminates.
PRESENTATION OUTLINE
Introduction,History of Nanotechnology,What is Nanotechnology, Definition of Nano,History of Graphene,Graphene,Why Nanotechnology,Size of Nanotechnology,What is Graphene, Properties of Graphene,Graphene Structure,Types of Graphene ,Synthesize Graphene,Applications,Conclusions,References
This document discusses microprocessor control of injection molding machines. It begins by introducing microprocessors and their ability to process both analog and digital signals. It then explains that microprocessor control offers improved accuracy, efficiency and versatility. It describes the components of a microprocessor control unit and its functions like sequence control and monitoring. It differentiates between open loop and closed loop control systems, listing their advantages and disadvantages. Finally, it discusses some advantages of microprocessor control like multi-stage pressure and speed regulation, and applications in various industries including automation using robotic systems.
This document provides an overview of zeta potential, including:
- Zeta potential is the electric potential at the boundary between the double layer and bulk solution surrounding charged particles suspended in a colloid.
- Factors that affect zeta potential include pH, thickness of the double layer, and concentration of formulation components.
- Zeta potential is important for predicting particle interactions and stability in colloidal systems based on DLVO theory of electrostatic repulsion and van der Waals attraction.
- Measurement techniques include electrophoresis and electroacoustic methods to determine particle mobility from which zeta potential is calculated.
The glass transition temperature (Tg) refers to the temperature at which an amorphous polymer transitions from a hard, brittle glass to a softer, rubbery state over a narrow temperature range. In partially crystalline polymers, this transition only occurs in the amorphous regions, while the crystalline zones remain unchanged and act as reinforcing elements. Tg is an important mechanical property that causes changes in hardness, volume, modulus, and elongation at break. Melting is a separate transition that occurs at the crystalline melting temperature in which polymer chains fall out of their crystal structures and become liquid.
This document discusses surface modification techniques. It introduces surface modification and lists some of its purposes like enhancing anticorrosive and adhesion properties. It presents a modern classification of surface modification and discusses some technical resources for surface modification like plasma treatment and corona discharge. Plasma treatment can be used for micro cleaning, functionalization, and establishing hydrophobic and hydrophilic properties. Corona discharge modifies surfaces to provide longer lifespan, improve bonding and corrosion resistance. It also lists some commercial corona plasma equipment manufacturers and provides references.
Composite Materials are widely used in day today life and as well as in automotive and aerospace industry which are monolithic composites.but most of the monolithic composites are not able to achieve required mechanical properties,so to achieve those mechanical properties Metal Matrix composites widely used in different sectors.some of Compiled information on MMC are presented in this presentation.
This document discusses various mechanical properties of materials including elastic deformation, engineering strain, tensile strength, toughness, yielding, modulus of elasticity, Poisson's ratio, ductility, malleability, hardness, and fatigue. It provides definitions and explanations of these key material properties and how they relate to a material's behavior under stress or loads over time.
Additive manufacturing (AM) is the industrial production name for 3D printing, a computer controlled process that creates three dimensional objects by depositing materials, usually in layers,is a transformative approach to industrial production that enables the creation of lighter, stronger parts and systems. ... As its name implies, additive manufacturing adds material to create an object.
The document discusses rate controlled sintering in advanced ceramic processes. It explains that sintering transforms ceramic powder compacts into dense materials through heating by reducing pores and growing grains. The driving force is lowering free energy. Sintering occurs in three stages and is affected by various factors. Rate controlled sintering controls the heating rate or temperature to control the sintering process for improved material properties. It provides examples demonstrating the effects of heating rate on microstructure.
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Powder Mixed Electric Discharge MachiningSoumavo Boral
1. The document discusses powder mixed electro discharge machining (PMEDM), a variant of electro discharge machining (EDM) that improves surface finish, material removal rate, and reduces tool wear.
2. In PMEDM, fine conductive powder is mixed with the dielectric fluid, allowing for more uniform sparking between the tool and workpiece.
3. Key benefits of PMEDM include the ability to machine any conductive material regardless of hardness and the ability to produce complex, stress-free geometries with a fine surface finish.
Surface modification techniques in biomedical sector Sum K
Surface modification processes and applications are discussed for biomedical sector. Ti, Co-Cr and various implants are considered. The techniques involved are Micro arc Oxidation, Electron Beam Deposition, Plasma Immersion Ion Implantation, Gas Nitriding and many more for corrosion and wear resistance, biointegration, fatigue resistance.
Isostatic pressing is a powder metallurgy technique that applies equal pressure in all directions to compact powdered materials. There are three main types - cold isostatic pressing, hot isostatic pressing, and warm isostatic pressing. Isostatic pressing allows for high density and uniform compaction of materials without the need for lubricants. It can be used to compact difficult materials like superalloys. The global isostatic pressing market was valued at $5.72 billion in 2017 and is projected to reach $9.22 billion by 2023, growing at a CAGR of 8.08% due to increasing demand for high-density 3D printed parts and investment in aerospace and defense applications
In today’s lecture we present techniques for analyzing situations in which there can be large scale yielding, and determine expressions for the stress components inside the plastic zone. We will begin with a discussion of the J integral.
SMA
The document discusses the concept of creep, which is the slow plastic deformation of a material under a constant load below its proportional limit. Creep can continue until fracture and usually occurs at high temperatures. It is an important property to consider in designing engines, boilers, and turbines. Creep occurs in three stages - primary, secondary, and tertiary. The secondary stage where creep occurs at a constant rate is used to estimate service life. Creep resistance depends on factors like heat treatment, grain size, strain hardening, and alloying elements. Theories describe creep rate increasing with stress and temperature according to specific equations.
Graphene is a single layer of graphite, which is a pure crystalline form of carbon. It was first isolated in 2004 by researchers at the University of Manchester. Graphene has exceptional properties such as being the thinnest, strongest, most conductive and flexible material known. It is light, transparent and an excellent conductor of heat and electricity. These properties give graphene potential applications in areas like batteries, touchscreens, composites and biotechnology. Further research aims to utilize graphene's tunable bandgap for applications like transistors and integrated circuits.
Magnetic particle testing (MPT) is used to detect surface and near-surface defects in ferromagnetic materials. It works by magnetizing the material, applying iron-based magnetic particles, and looking for patterns in how the particles accumulate at locations where the magnetic field escapes due to defects. Key steps include cleaning, demagnetizing, magnetizing using various methods like permanent magnets or electromagnets, applying dry or wet magnetic particles, illuminating to see indications, interpreting findings, and documenting results. MPT is widely used in industries like manufacturing, aerospace, and infrastructure for quality control and non-destructive testing of parts like castings and welds.
The document summarizes different types of manipulator end effectors, including friction-based grippers, 2-point contact manipulators, multi-finger hands, suction-based effectors, and magnetic grippers. It provides examples of each type and discusses their advantages and disadvantages. Friction-based grippers can grasp a variety of objects but require more analysis, while suction and magnetic grippers are suited to planar/metallic objects respectively but require less analysis. A hybrid suction/friction gripper provides high versatility.
This document discusses robot end effectors. It defines an end effector as a device that attaches to a robot arm and enables it to perform specific tasks. There are two main types of end effectors: grippers, which grasp and manipulate objects, and tools, which perform processes like welding. It describes various types of grippers including mechanical, suction, magnetic, and adhesive grippers. Mechanical grippers use fingers actuated by different mechanisms like linkages, gears, cams, or screws to grasp objects. Gripper selection depends on factors like the object weight and geometry.
The document discusses various techniques for manufacturing composites, including hand layup, pultrusion, resin transfer molding, and injection molding. It provides details on the hand layup process, describing how dry fibers and resins are layered by hand in an open mold. Pultrusion is defined as a continuous process that pulls reinforced fibers through a resin bath and heated die to produce cured, constant cross-section parts. Resin transfer molding involves packing dry fibers into a mold, injecting resin under pressure, and curing the mold to produce complex, net-shape parts in medium volumes. Each technique has advantages for certain applications in industries like aerospace, transportation, and construction.
This presentation contains the basics of the composites, types of the composites and the processing of the composites or we can say that manufacturing of the composites. This presentation can also help who are working on the de-lamination of the laminates.
PRESENTATION OUTLINE
Introduction,History of Nanotechnology,What is Nanotechnology, Definition of Nano,History of Graphene,Graphene,Why Nanotechnology,Size of Nanotechnology,What is Graphene, Properties of Graphene,Graphene Structure,Types of Graphene ,Synthesize Graphene,Applications,Conclusions,References
This document discusses microprocessor control of injection molding machines. It begins by introducing microprocessors and their ability to process both analog and digital signals. It then explains that microprocessor control offers improved accuracy, efficiency and versatility. It describes the components of a microprocessor control unit and its functions like sequence control and monitoring. It differentiates between open loop and closed loop control systems, listing their advantages and disadvantages. Finally, it discusses some advantages of microprocessor control like multi-stage pressure and speed regulation, and applications in various industries including automation using robotic systems.
This document provides an overview of zeta potential, including:
- Zeta potential is the electric potential at the boundary between the double layer and bulk solution surrounding charged particles suspended in a colloid.
- Factors that affect zeta potential include pH, thickness of the double layer, and concentration of formulation components.
- Zeta potential is important for predicting particle interactions and stability in colloidal systems based on DLVO theory of electrostatic repulsion and van der Waals attraction.
- Measurement techniques include electrophoresis and electroacoustic methods to determine particle mobility from which zeta potential is calculated.
The glass transition temperature (Tg) refers to the temperature at which an amorphous polymer transitions from a hard, brittle glass to a softer, rubbery state over a narrow temperature range. In partially crystalline polymers, this transition only occurs in the amorphous regions, while the crystalline zones remain unchanged and act as reinforcing elements. Tg is an important mechanical property that causes changes in hardness, volume, modulus, and elongation at break. Melting is a separate transition that occurs at the crystalline melting temperature in which polymer chains fall out of their crystal structures and become liquid.
This document discusses surface modification techniques. It introduces surface modification and lists some of its purposes like enhancing anticorrosive and adhesion properties. It presents a modern classification of surface modification and discusses some technical resources for surface modification like plasma treatment and corona discharge. Plasma treatment can be used for micro cleaning, functionalization, and establishing hydrophobic and hydrophilic properties. Corona discharge modifies surfaces to provide longer lifespan, improve bonding and corrosion resistance. It also lists some commercial corona plasma equipment manufacturers and provides references.
Composite Materials are widely used in day today life and as well as in automotive and aerospace industry which are monolithic composites.but most of the monolithic composites are not able to achieve required mechanical properties,so to achieve those mechanical properties Metal Matrix composites widely used in different sectors.some of Compiled information on MMC are presented in this presentation.
This document discusses various mechanical properties of materials including elastic deformation, engineering strain, tensile strength, toughness, yielding, modulus of elasticity, Poisson's ratio, ductility, malleability, hardness, and fatigue. It provides definitions and explanations of these key material properties and how they relate to a material's behavior under stress or loads over time.
Additive manufacturing (AM) is the industrial production name for 3D printing, a computer controlled process that creates three dimensional objects by depositing materials, usually in layers,is a transformative approach to industrial production that enables the creation of lighter, stronger parts and systems. ... As its name implies, additive manufacturing adds material to create an object.
The document discusses rate controlled sintering in advanced ceramic processes. It explains that sintering transforms ceramic powder compacts into dense materials through heating by reducing pores and growing grains. The driving force is lowering free energy. Sintering occurs in three stages and is affected by various factors. Rate controlled sintering controls the heating rate or temperature to control the sintering process for improved material properties. It provides examples demonstrating the effects of heating rate on microstructure.
Mechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materialsMechanical properties of materials
Powder Mixed Electric Discharge MachiningSoumavo Boral
1. The document discusses powder mixed electro discharge machining (PMEDM), a variant of electro discharge machining (EDM) that improves surface finish, material removal rate, and reduces tool wear.
2. In PMEDM, fine conductive powder is mixed with the dielectric fluid, allowing for more uniform sparking between the tool and workpiece.
3. Key benefits of PMEDM include the ability to machine any conductive material regardless of hardness and the ability to produce complex, stress-free geometries with a fine surface finish.
Surface modification techniques in biomedical sector Sum K
Surface modification processes and applications are discussed for biomedical sector. Ti, Co-Cr and various implants are considered. The techniques involved are Micro arc Oxidation, Electron Beam Deposition, Plasma Immersion Ion Implantation, Gas Nitriding and many more for corrosion and wear resistance, biointegration, fatigue resistance.
Isostatic pressing is a powder metallurgy technique that applies equal pressure in all directions to compact powdered materials. There are three main types - cold isostatic pressing, hot isostatic pressing, and warm isostatic pressing. Isostatic pressing allows for high density and uniform compaction of materials without the need for lubricants. It can be used to compact difficult materials like superalloys. The global isostatic pressing market was valued at $5.72 billion in 2017 and is projected to reach $9.22 billion by 2023, growing at a CAGR of 8.08% due to increasing demand for high-density 3D printed parts and investment in aerospace and defense applications
In today’s lecture we present techniques for analyzing situations in which there can be large scale yielding, and determine expressions for the stress components inside the plastic zone. We will begin with a discussion of the J integral.
SMA
The document discusses the concept of creep, which is the slow plastic deformation of a material under a constant load below its proportional limit. Creep can continue until fracture and usually occurs at high temperatures. It is an important property to consider in designing engines, boilers, and turbines. Creep occurs in three stages - primary, secondary, and tertiary. The secondary stage where creep occurs at a constant rate is used to estimate service life. Creep resistance depends on factors like heat treatment, grain size, strain hardening, and alloying elements. Theories describe creep rate increasing with stress and temperature according to specific equations.
Graphene is a single layer of graphite, which is a pure crystalline form of carbon. It was first isolated in 2004 by researchers at the University of Manchester. Graphene has exceptional properties such as being the thinnest, strongest, most conductive and flexible material known. It is light, transparent and an excellent conductor of heat and electricity. These properties give graphene potential applications in areas like batteries, touchscreens, composites and biotechnology. Further research aims to utilize graphene's tunable bandgap for applications like transistors and integrated circuits.
Magnetic particle testing (MPT) is used to detect surface and near-surface defects in ferromagnetic materials. It works by magnetizing the material, applying iron-based magnetic particles, and looking for patterns in how the particles accumulate at locations where the magnetic field escapes due to defects. Key steps include cleaning, demagnetizing, magnetizing using various methods like permanent magnets or electromagnets, applying dry or wet magnetic particles, illuminating to see indications, interpreting findings, and documenting results. MPT is widely used in industries like manufacturing, aerospace, and infrastructure for quality control and non-destructive testing of parts like castings and welds.
The document summarizes different types of manipulator end effectors, including friction-based grippers, 2-point contact manipulators, multi-finger hands, suction-based effectors, and magnetic grippers. It provides examples of each type and discusses their advantages and disadvantages. Friction-based grippers can grasp a variety of objects but require more analysis, while suction and magnetic grippers are suited to planar/metallic objects respectively but require less analysis. A hybrid suction/friction gripper provides high versatility.
This document discusses robot end effectors. It defines an end effector as a device that attaches to a robot arm and enables it to perform specific tasks. There are two main types of end effectors: grippers, which grasp and manipulate objects, and tools, which perform processes like welding. It describes various types of grippers including mechanical, suction, magnetic, and adhesive grippers. Mechanical grippers use fingers actuated by different mechanisms like linkages, gears, cams, or screws to grasp objects. Gripper selection depends on factors like the object weight and geometry.
The human hand is a complex structure that allows for grasping and manipulation of objects through coordinated movement of bones, muscles, tendons, and ligaments. It performs two main functions: prehension through flexion of finger and thumb joints powered by extrinsic and intrinsic muscles like the flexor digitorum profundi and first dorsal interossei, and fine motor tasks requiring precision pinch between the thumb and forefinger powered more by intrinsic muscles. Different grips like power, precision, cylindrical, and hook use flexion of various finger joints while positioning the wrist to stably hold objects of varying size and shape.
This document discusses different types of grips used by the human hand and their strengths and weaknesses. It describes power grips, pinch grips, oblique grips, hook grips, and palm-up and palm-down grips. For each grip type, it outlines factors like strength capabilities and optimal dimensions. It also discusses pushing and pulling motions, noting horizontal pushing is stronger than pulling and optimal heights for application of force.
Vee designed an external accessor y for a robotic application.It is a spring operated 2 jaw gripper arm with smooth opening and closing gripping action.
Robot Gripper for High-Mix, Low Volume AutomationRobotiq
Why can't we automate high-mix, low volume production today even though the first industrial robot was installed in 1961?
This presentation explains how we must change our mind to make this happen.
The document discusses the application of robotics in the textile industry. It describes how industrial robots are being used for various tasks like bale handling, yarn splicing, auto cone changing, auto doffing, garment folding and packing, embroidery, fabric testing, and welding. The use of robots improves productivity, reduces costs and cycle times, improves product quality and safety, and increases efficiency. However, robots also have disadvantages like high costs, requirement of experts for maintenance, and potential threats to employment. Overall, robotics is helping to improve various operations in the textile industry.
This document discusses various types of grippers and lifting mechanisms used in robotics, including vacuum grippers, parallel grippers, pneumatic grippers, roller grippers, and 4-bar linkage mechanisms. It provides details on the working, advantages, and disadvantages of each type. Scissor lifts are also summarized as using linked, folding supports to lift a platform in a bumpy motion that is faster in the middle of the journey than at the start and end.
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODELgerogepatton
As digital technology becomes more deeply embedded in power systems, protecting the communication
networks of Smart Grids (SG) has emerged as a critical concern. Distributed Network Protocol 3 (DNP3)
represents a multi-tiered application layer protocol extensively utilized in Supervisory Control and Data
Acquisition (SCADA)-based smart grids to facilitate real-time data gathering and control functionalities.
Robust Intrusion Detection Systems (IDS) are necessary for early threat detection and mitigation because
of the interconnection of these networks, which makes them vulnerable to a variety of cyberattacks. To
solve this issue, this paper develops a hybrid Deep Learning (DL) model specifically designed for intrusion
detection in smart grids. The proposed approach is a combination of the Convolutional Neural Network
(CNN) and the Long-Short-Term Memory algorithms (LSTM). We employed a recent intrusion detection
dataset (DNP3), which focuses on unauthorized commands and Denial of Service (DoS) cyberattacks, to
train and test our model. The results of our experiments show that our CNN-LSTM method is much better
at finding smart grid intrusions than other deep learning algorithms used for classification. In addition,
our proposed approach improves accuracy, precision, recall, and F1 score, achieving a high detection
accuracy rate of 99.50%.
Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...University of Maribor
Slides from talk presenting:
Aleš Zamuda: Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapter and Networking.
Presentation at IcETRAN 2024 session:
"Inter-Society Networking Panel GRSS/MTT-S/CIS
Panel Session: Promoting Connection and Cooperation"
IEEE Slovenia GRSS
IEEE Serbia and Montenegro MTT-S
IEEE Slovenia CIS
11TH INTERNATIONAL CONFERENCE ON ELECTRICAL, ELECTRONIC AND COMPUTING ENGINEERING
3-6 June 2024, Niš, Serbia
Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
Literature Review Basics and Understanding Reference Management.pptxDr Ramhari Poudyal
Three-day training on academic research focuses on analytical tools at United Technical College, supported by the University Grant Commission, Nepal. 24-26 May 2024
ACEP Magazine edition 4th launched on 05.06.2024Rahul
This document provides information about the third edition of the magazine "Sthapatya" published by the Association of Civil Engineers (Practicing) Aurangabad. It includes messages from current and past presidents of ACEP, memories and photos from past ACEP events, information on life time achievement awards given by ACEP, and a technical article on concrete maintenance, repairs and strengthening. The document highlights activities of ACEP and provides a technical educational article for members.
6th International Conference on Machine Learning & Applications (CMLA 2024)ClaraZara1
6th International Conference on Machine Learning & Applications (CMLA 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications of on Machine Learning & Applications.
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
1. Gripping technologies 1
1 on the basis of the paper “Grasping devices and methods in
automated production processes” , CIRP Annals - Manufacturing
Technology, Volume 63, Issue 2, 2014,
G. Fantoni
Department of Civil and Industrial Engineering
University of Pisa (Italy)
NEWTECH 2013
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 1
2. Remarks
• The presentation has been prepared for NewTech Conference 2013 and it is
titled Gripping Technology. However it is based on the CIRP Keynote
paper titled «Grasping devices and methods in automated production
processes».
• Please refer to this presentation by citing the paper as:
Fantoni, G., Santochi, M., Dini, G., Tracht, K., Scholz-Reiter, B., Fleischer, J.,
Lien, T.K., Seliger, G., Reinhart, G.,Franke, J., Hansen, H.N., Verl, A.,2014,
Grasping devices and methods in automated production processes, CIRP
Annals - Manufacturing Technology, Volume 63, Issue 2, 2014, Pages 679-
701, ISSN 0007-8506, http://dx.doi.org/10.1016/j.cirp.2014.05.006.
• The final version of the present paper can be found at
http://www.sciencedirect.com/science/article/pii/S0007850614001887
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 2
5. Gripper: definition
“a subsystems of handling mechanisms which provide
temporary contact with the object to be grasped [..] and ensure
the position and orientation when carrying and mating the object
to the handling equipment [..]; the term “gripper” is also used in
cases where no actual grasping, but rather holding of the object
where the retention force can act on a point, line or surface [..]”
Monkman et al. Robot grippers
In abstract terms:
h. mechanisms + Block/Hold + object + temporary
That means that after grasping
some of the DOF of G. and O. are the same
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 5
6. Cases of «not standard» grippers
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 6
8. The grasping process
1. Approaching the object: the gripper is positioned nearby the object.
2. Coming into contact with the object surface
3. Increasing the grasping force: the grasping force is increased, within certain limits.
4. Securing the object. The force stops increasing. The dof of the object are removed
5. Lifting the object;
6. Releasing the object. Issue at the microscale;
Monitoring the grasp: direct or indirect control of force, torque, stick slip sensors, contact.
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 8
9. But is it true?
FEEDING GRASPING HANDLING PLACING
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 9
10. But is it true?
FEEDING GRASPING HANDLING PLACING
S
N
Porous plies Steel sheets
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 10
11. But is it true?
FEEDING GRASPING HANDLING PLACING
S
N
Porous plies Steel sheets
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 11
12. But is it true?
FEEDING GRASPING HANDLING PLACING
High accelerations
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 12
13. Adhesion problems in micro
assembly
Force between a silicon sphere and plane (by Fearing)
100
10-5
force [N]
10-10
10-6 10-5 10-4 10-3 10-15
radius of the sphere [m]
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 13
NEWTECH 2013 G. Fantoni - Gripping technology
14. Releasing??
Releasing problems only at microscale? FALSE
permanent magnets on
rotors of electric drives Sol-Gel dough products Frozen products
An for sure at micro and nano scale
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 14
17. Standard Friction and Jaw grippers
Friction-jaw mechanical grippers
sx) two fingers;
centre) single moving finger;
dx) microgripper piezoelectrically
actuated.
20°
90° 90°
20°
b)
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 17
a)
c) d)
See Festo
See Monkman
18. Friction and Jaw grippers: standard?
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 18
20. Vacuum: the key tech in SMDs assembly
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 20
NEWTECH 2013 G. Fantoni - Gripping technology
23. Capillary grippers
At microscale capillary grippers have been used owing to their flexibility
and reliability; have a compliant behaviour and a self-centring effect;
capability of grasping small and light components in a wide range of
materials and shapes; capability of handling delicate components as the
meniscus between the gripper and the object has a “bumper” effect.
To release parts grasped by
capillary grippers:
- Scratching agaist an
edge,
- Two different fluids,
- Changing the gripper
curvature,
- Electrowetting.
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 23
24. Capillary principle
α1 α2 Fc=FL+FT (1)
Gripper
T T
T T
mg
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 24
pa
pl
FL= 2 HπRa
2 (2)
FT= 2πRaγsin(θ+α) (3)
In the previous equations γ is
the surface tension (for water
~7210-3Nm-1) and
H=2(1/r0-1/r1).
25. Capillary grippers
• Reliable
• Self centering
• Compliant
• It can work without refilling for more than
1000 times (grasping-releasing cycles)
• It leaves traces and can stain lenses or
surface finished parts (mirrors, optics)
• Particular care in its use with SMDs and
other electronic components
• Often the process need for a following
phase of heating in order to remove (by
evaporation) the liquid
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 25
26. Capillary grippers: grasping and releasing
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 26
27. Capillary grippers: grasping and releasing
Grasping
Moving Releasing
Working principle of the
adhesion gripper able to
“grasp” and release microparts
by a curvature change.
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 27
NEWTECH 2013 G. Fantoni - Gripping technology
28. Grasping and releasing microparts exploiting
liquids with different surface tensions
A novel grasping and releasing strategy for microparts exploiting liquids with different surface tensions
[Fantoni, Porta, Santochi]
Releasing Force
h [mm]
Vol [mm3]
Fc [mN]
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 28
29. Results
High reliability Centring effect
Many tests,
all succeeded
100% reliability
Also for very small ‘releasing’ volume
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 29
NEWTECH 2013 G. Fantoni - Gripping technology
31. «ice» gripper
More in general we can define them as «phase transition
grippers», they exploit the transition of a material from
liquid to ‘solid’.
Ultrasonic-assisted adhesive for
limp and air-permeable textiles
Ice gripper
for limp and air-permeable textiles
Ice gripper
for
microlenses
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 31
35. Electrostatic Microgrippers with
centering capabilities
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 35
NEWTECH 2013 G. Fantoni - Gripping technology
36. Force acting at the micro scale
Van der Waals
Capillary
Electrostatic
Forces
Adhesion
force
g
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 36
NEWTECH 2013 G. Fantoni - Gripping technology
37. Van der Waals forces
Towards gecko tapes
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 37
NEWTECH 2013 G. Fantoni - Gripping technology
38. Adhesive grippers: grasping and releasing
a b c d
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 38
NEWTECH 2013 G. Fantoni - Gripping technology
39. Ultrasound «gripper»
Sonodrote: the parts are
moved by the air pressure
generated by a sonodrote.
The parts levitate above the
plate.
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 39
45. The grasping process
1. Approaching the object: the gripper is positioned nearby the object.
2. Coming into contact with the object surface
3. Increasing the grasping force: the grasping force is increased, within certain limits.
4. Securing the object. The force stops increasing. The dof of the object are removed
5. Lifting the object;
6. Releasing the object. Issue at the microscale;
Monitoring the grasp: direct or indirect control of force, torque, stick slip, contact.
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 45
46. The monitoring methods
Sensing principles:
a) Mechanical switch;
b) electrical sensor;
c) photoelectric sensor;
d) vision based;
e) tactile sensor;
f) strain gauges;
g) force/torque sensor;
h) vision based;
i) capacitive or electrostatic;
j) led-photodiode (often IR);
k) vision based monitoring.
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 46
47. Flat‐pack inductive
proximity sensor
Piezoresitive
The monitoring methods
Strain gauges
[Tracht]
z-sensor
y-sensor
x-sensor
gripper
GEH6030
adapter
plate
gripper finger 1
gripper finger 2
Capacitive sensor
Indirect force measuring system
x
y
z
[Fantoni]
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 47
NEWTECH 2013 G. Fantoni - Gripping technology
49. Trends
• More than one single principle per time
• Soft one piece gripper (silicon or AM)
• High coupling
• Active surfaces
• New «principles» and «strategies»
• Underactuated grippers
• Bimanual handling
• Lightweight grippers
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 49
50. Trends
• More than one single principle per time
• Soft one piece gripper (silicon or AM)
• High coupling
• Active surfaces
• New «principles» and «strategies»
• Underactuated grippers
• Bimanual handling
• Lightweight grippers
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 50
51. Hybrid Grippers
A new generation of hybrid grippers seems emerging:
• More than two principles per gripper
• Increasing object-gripper coupling
Form + Force
+ Vacuum
Electroadhesive + Force Bernoulli + «Form»
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 51
53. Electrostatic + Form
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 53
54. Jamming technology for grasping
Form + Friction + Vacuum (+ liquid/solid transition)
The Jamming Gripper is based on a
granular material contained in a
flexible membrane. The latex balloon
membrane is connected to the base
through a collar, producing an airtight
seal. The collar is the rigid part of the
gripper (when not actuated) and helps to
guide the gripper and to fit its shape to
the target. When the gripper and the
object are coupled, vacuum is provided
and a transition from deformable to
rigid state generates the grasping force
(grasping based on friction).
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 54
55. Working modes
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 55
56. Electrostatic Peltiér
Micro distributed vacuum cups Adhesive silicon gripper
Programmable
Switchable
Adhesive
+distributed
vacuum
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 56
NEWTECH 2013 G. Fantoni - Gripping technology
57. Trends
• More than one single principle per time
• Soft one piece gripper (silicon or AM)
• High coupling
• Active surfaces
• New «principles» and «strategies»
• Underactuated grippers
• Bimanual handling
• Lightweight grippers
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 57
58. Soft grippers
a) b) c) d)
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 58
e)
60. Trends
• More than one single principle per time
• Soft one piece gripper (silicon or AM)
• High coupling
• Active surfaces
• New «principles» and «strategies»
• Underactuated grippers
• Bimanual handling
• Lightweight grippers
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 60
62. Flexible and compliant friction gripper
The “hose gripper” is a flexible
gripper, formed of a double-walled
hose filled with water or air. This
hose is contained into a pipe and
actuated by a plunger that moves up
and down into the double-walled
hose. To make the gripper capable of
grasping and lifting objects, the
underside of the hose is located over
the object, thus partially covering the
object’s surface. When the plunger
raises, the hose and the object are
roped into the rigid pipe. The
releasing is performed moving back
the plunger.
The grasping is performed by
exploiting both form and force
closure (friction).
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 62
NEWTECH 2013 G. Fantoni - Gripping technology
64. Handling of flexible materials: leather plies
Since its flexibility, the compliant
vacuum cup is able to maintain the
grasping also in case of deformable
objects (leather plies, textiles, etc..).
During handling, the borders of the
objects fall down due to gravity.
Therefore the entire object deforms
and, if the vacuum cup does not
follow the object shape, the vacuum
decreases and the object is released.
The compliancy of the vacuum cup
(due to both design and material)
allows a reliable securing phase.
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 64
65. Adaptable + self-activating valves
vacuum vacuum
vacuum
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 65
NEWTECH 2013 G. Fantoni - Gripping technology
66. Various approaches to adaptability
[Scott] [Pettersson]
[Reinhart]
[Jonas]
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 66
NEWTECH 2013 G. Fantoni - Gripping technology
67. Trends
• More than one single principle per time
• Soft one piece gripper (silicon or AM)
• High coupling
• Active surfaces
• New «principles» and «strategies»
• Underactuated grippers
• Bimanual handling
• Lightweight grippers
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 67
68. Active surfaces
a) b)
c) d)
a) Roll-on gripper
b) Velvet fingers
c) Traction gripper
d) Robin Read’s g.
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 68
70. Traction gripper for logistic applications
The Traction Gripper consists of double
belt conveying units arranged
perpendicular to each other. Each unit
has traction belts that exert a friction
force allowing the grasping of several
shape goods. Each conveyor belts has a
separate drive chain. The inward
conveying motion of the traction belts
causes friction between the active
surfaces. The object is pulled into the
right angle and held there firmly.
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 70
72. Trends
• More than one single principle per time
• Soft one piece gripper (silicon or AM)
• High coupling
• Active surfaces
• New «principles» and «strategies»
• Underactuated grippers
• Bimanual handling
• Lightweight grippers
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 72
73. From Micro to Macro and viceversa
Van derWaals Capillary Needle
[Parness]
Cutkosky [Lanzetta]
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 73
74. Terrific forces
[Cutkosky], [Parness] Video
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 74
75. The Gecko Adhesive System
Lamellae—mm scale
Branches—μm scale
Setae—10s of μms
Spatulae—10s of nms
[Autumn], [Parness] Contact features use van der Waals forces
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 75
77. Loading the Wedges
Load Direction
Unloaded
Moderately Loaded
Adhesion OFF
Adhesion ON
NEWTECH 2013 G. Fantoni - Gripping technology
Heavily Loaded
HIGH Adhesion ON
STC-A 2011 Fantoni G.- Active surfaces, materials and tools for assembly - 77
83. Toward a new adhesive gripper
W Federle, W.J.P Barnes,
W Baumgartner, P
Drechsler and J.M Smith,
Wet but not slippery:
boundary friction in tree
frog adhesivetoe pads J.
R. Soc. Interface 2006 3,
689-697
GRASP
component
Hydrophobic areas
Hydrophillic areas
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 83
84. Toward a new adhesive gripper: skin and pulp
Frog Fingeprint (SEM)
Supehydrophobic surface
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 84
85. Theoretical model
mg
h*
F1
xa1
mg
mg F2
h*
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 85
A
B
C
86. xa1
R Theoretical model
F3
xa2
F1
xa3
F4
mg
mg
mg
water
superhydrophobic
water
hydrophobic
water
hydrophilic
Hydrophobic ring
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 86
D
E
F
88. Active surfaces for grasping and
releasing of microparts
Grasping and releasing of microparts by using active hydrophillic-phobic surfaces
[Fantoni, Hansen, Santochi ]
Programmable hydrophobic surfaces [Fantoni, Zang, Tosello, Hansen] in progress
Standard Treated
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 88
89. Other principles?
SWITL: an active shovel able to pick up even semi-liquid materials
Cargo floor: stick slip motion through selective surfaces activation
But can smart fluids be used?
Dilatants fluids:
what for in microassembly?
Tixotropic liquids: their viscosity changes
with the movement. e.g. S. Gennaro’s
blood, wine, maionnaise, ketchup,
quicksands, etc..
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 89
91. Conclusions
• Research activities
– RobLog (7° EU project)
– MicroGrippers expoliting structured surfaces
– Extension of the grasping principles from micro to macro
– Continue the research on compliant, actuated, hyerarchical
surfaces
• Search for partners for joint projects and exchange of
students
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 91
92. Aknowledgements
• Newtech 2013 Organizing commitee
(mainly my former student Antonio Maffei)
• RobLog project (7° FP)
• Fantoni, G., Santochi, M., Tracht, K., Dini, G., Scholz-Reiter,
B., Fleischer, J., Lien, T.K., Seliger, G., Reinhart, G., Franke,
J., Hansen, H.N., Verl, A., 2014, Grasping devices and
methods in automated production processes
Thank You for your attention!
STNCE-WA T2E0C11H 2013 Fantoni G.- Active surfaGce.s ,F maantteorinalis -anGdr tiopoplsi nfogr atsescehmnbolylo-gy 92
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107. 1 on the basis of the paper “Grasping devices and methods in
automated production processes” , CIRP Annals - Manufacturing
Technology, Volume 63, Issue 2, 2014,
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7
Gripping technologies 1
G. Fantoni g.fantoni@ing.unipi.it
Department of Civil and Industrial Engineering
University of Pisa (Italy)
NEWTECH 2013