Assembly is often a neglected activity: human beings are clever, dexterous and adaptable, so all too often we leave the production worker to figure things out. Proper assembly planning would reduce risks, and save time and money. This presentation introduces the key concepts of assembly sequence generation and evaluation. It doesn’t promote any particular software tool, but provides an introduction to the types that exist, and makes a case for a systematic consideration of the assembly task. Review questions for learners are included.
Downloadable presentation in Powerpoint format, originally produced with Keynote.
GT Definition,Implementing Group Technology (GT),four methods GT, 1.OPTIZ PARTS CLASSIFICATION AND CODING SYSTEM,2.MICLASS coding system ,CODE MDSI System,BENEFITS OF GROUP TECHNOLOGY and limitations.
GT Definition,Implementing Group Technology (GT),four methods GT, 1.OPTIZ PARTS CLASSIFICATION AND CODING SYSTEM,2.MICLASS coding system ,CODE MDSI System,BENEFITS OF GROUP TECHNOLOGY and limitations.
Introduction, Conventional and Revised with CAD/CAM Product cycle, Application of computers to the design process, comparison of capabilities of designers and computers, Reasons for implementing CAD, Benefits of CAD, CAD workstation,
The society of manufacturing engineers (SME) Defines CIM is integration of the total manufacturing enterprise through the use of integrated systems and data communications coupled with the new managerial philosophies that improve organizational and personal efficiency. CIM combines various technologies like computer-aided design (CAD) and computer-aided manufacturing (CAM) to provide an error-free manufacturing process that reduces manual labor and automates repetitive tasks.
Introduction to machine maintinance and installationtechnovic
This ppt is an introduction on how we can operate maintainance of machines and installs a new machine, this guide helps for all engineering students teachers and others mainly who are engaged in MECHANICAL ENGINEERING.
Introduction, Conventional and Revised with CAD/CAM Product cycle, Application of computers to the design process, comparison of capabilities of designers and computers, Reasons for implementing CAD, Benefits of CAD, CAD workstation,
The society of manufacturing engineers (SME) Defines CIM is integration of the total manufacturing enterprise through the use of integrated systems and data communications coupled with the new managerial philosophies that improve organizational and personal efficiency. CIM combines various technologies like computer-aided design (CAD) and computer-aided manufacturing (CAM) to provide an error-free manufacturing process that reduces manual labor and automates repetitive tasks.
Introduction to machine maintinance and installationtechnovic
This ppt is an introduction on how we can operate maintainance of machines and installs a new machine, this guide helps for all engineering students teachers and others mainly who are engaged in MECHANICAL ENGINEERING.
Design for Assembly (DFA) is a vital component of concurrent engineering – the multidisciplinary approach to product development. You might think it strange to begin by thinking about the assembly before you have designed all the components, but you can often eliminate many parts at the conceptual stage, and save yourself a lot of trouble.
This slideshow provides an introduction to the rules that are used in industry to produce affordable, reliable products. It includes the in-depth analysis of two real-world products subjected to a "product autopsy", detailed in photographs, plus tutor notes and recommendations for additional activities including an assembly game.
+++
Thanks for all the interest shown in this presentation... visit Capacify and leave me a message if you have any questions or comments. Also let me know if you'd like to have me as a guest speaker: the in-class 'ease of assembly game' is always fun.
Purpose Statement:
To provide an overview of Design for Manufacturing and Assembly (DFMA) techniques, which are used to minimize product cost through design and process improvements.
Computer Aided Process Planning (CAPP): concepts; traditional and CAPP; automated
process planning: process planning, general methodology of group technology, code
structures of variant and generative process planning methods, AI in process planning,
process planning software.
Flexible Manufacturing Systems (FMS): Introduction, types, concepts, need and
advantages of FMS - cellular and FMS - JIT and GT applied to FMS.
Machine Learning Meets Quantitative Planning: Enabling Self-Adaptation in Aut...Pooyan Jamshidi
Modern cyber-physical systems (e.g., robotics systems) are typically composed of physical and software components, the characteristics of which are likely to change over time. Assumptions about parts of the system made at design time may not hold at run time, especially when a system is deployed for long periods (e.g., over decades). Self-adaptation is designed to find reconfigurations of systems to handle such run-time inconsistencies. Planners can be used to find and enact optimal reconfigurations in such an evolving context. However, for systems that are highly configurable, such planning becomes intractable due to the size of the adaptation space. To overcome this challenge, in this paper we explore an approach that (a) uses machine learning to find Pareto-optimal configurations without needing to explore every configuration and (b) restricts the search space to such configurations to make planning tractable. We explore this in the context of robot missions that need to consider task timeliness and energy consumption. An independent evaluation shows that our approach results in high-quality adaptation plans in uncertain and adversarial environments.
Paper: https://arxiv.org/abs/1903.03920
DevOps (Continuous Integrations, Continuous Delivery & Continuous deployment using Jenkins and Visual studio team services, setting up VTST build Agents, Integrating VSTS with SonarQube, NDepend,) , Complete automation of pushing code into VSTS from Visual Studio, Building Code by a Jenkin Server hosted on Azure and pushing that successful build on to Azure Web App via Release Pipeline or directly from Jenkins,VSTS Default agents, Setting up local agent from scratch, Setting up agents for code build, VSTS, Visual Studio Online Agents, Agent Pools, Hosted Agents, Hosted VS2017. Hosted Linux Agents, Setting up agent on VS Dev Test Labs, Setting up Template Parameters for Continuos Pipeline, Build Agent Creation Dynamically, Random Machine Name, Random Passwords, Dynamic Agent creation in VS Dev Test labs, Sonarcube, Code quality, Code Analysis, MSBuild, Integrate VSTS Build with NDepend, Package manager, Monolithic Architecture, Nuget, Package management, Npm js.com, Semantic versioning, Creating a nuget package, nuspec file, GitVersion Plugin, FeedURL, Chocolatey for package management, Chocolatey, chocolatey workflow,
Novel Approach to Automatically Generate Feasible Assembly Sequenceishan kossambe
Today the assembly sequence for the items is regularly completed manually and its definition, typically, is extremely extravagant, not ensuring ideal arrangements. Gathering arrangement arranging utilizing a business framework regularly depends on a master assembly sequence organizer, and it is dominatingly done manually. The difficulties to consequently produce gathering arrangements utilizing CAD models lie as a part of smart thinking and investigation of the displayed assembly information. This work displays a programmed approach expected to characterize gathering sequences, based on the data containing the mates, obstruction and the volume information existing among the parts, which is acquired by the assembly CAD model of the item. This paper exhibits a framework that can examine and use assembly information accessible from a CAD model to produce gathering arrangements. The framework likewise considers client input as a kind of assembly obligation. The framework is equipped for creating a set of positioned attainable assembly arrangement plans for an administrator to assess. A matrix approach has been embraced to process the data held from a CAD model. Obstruction and volume studies are completed amid the formation of assembly sequence plans.
We will go through how to analyze a design with Simulation CFD from beginning to end. We will start at the Inventor model and end at visualizing the results. In addition to seeing the actual workflow we will talk about how simulation tools can be used throughout the life of a design project, from early concept to final testing.
Leveraging Alf for SysML, Part 2: More Effective Trade Study ModelingEd Seidewitz
Alf is the OMG-standard textual language specifically designed for specifying executable behavior in the context of graphical, executable UML and SysML models. It is the best alternative to using complicated activity diagrams or scripting languages not designed for use in models. Part 2 of this tutorial focuses on leveraging Alf in SysML models for studying trade-offs between design variants.
Training and tuning models with lengthy training cycles like those in deep learning can be extremely expensive and may sometimes involve techniques that degrade performance. We'll explore recent research on optimization strategies to efficiently tune these types of deep learning models. We will provide benchmarks and comparisons to other popular methods for optimizing the models, and we'll recommend valuable areas for further applied research.
Slides from my talk on #ruby-mg meeting.
Intro about how we in catars.me are using postgREST to create fast and simple API that can be represented with various mithril.js components.
Pkyrete research project: interim presentationRichard Farr
This research project aimed to create ‘Environmentally Benign Containers’, exploring if the cold chain (for example, fish being transported in flaked ice) could employ reinforced ice – called Pkyrete – in place of styrofoam, to reduce the amount of single-use material going into landfill.
This presentation provides an introduction to the key concepts of the sustainable supply chain, providing definitions of sustainability, explaining climate change and the ways that supply chains can be expected to change in the future, as a result of the need to "go green".
Green design principles are introduced, including the need to avoid creating a "monstrous hybrid". The limitations of recycling are explained and the need for business models centred upon reuse is made clear. The presentation is designed for use at HE5 and HE6 (UK second year or final year Bachelors degree) but it could also be of interest to companies and individuals.
The slides are downloadable, and the download includes presenter notes – plus a short sustainability game that was used in class.
Get your classroom warmed up with this simple exercise, challenging students to decide and justify the location of a set of facilities. The slides are downloadable, and include teaching notes and a handout sheet for students to complete.
Richard Farr and Joe Gazdula: the Social Media Minefield, a presentation for the TIRI 2016 ("Teaching Intensive, Research Informed") conference. Looking at what social media might bring to the classroom... and discussing some of the hazards for educators.
Simulating the Impacts of RemanufacturingRichard Farr
It’s the billion-dollar industry that most people have never heard of: remanufacturing... taking products at the end of their life and making them as good as new (or better). Should businesses plan to get products back, renew them and make them serve again? That's complicated: the sustainability benefits of remanufacturing are obvious, but the consequences at the operational level include fluctuating capacity requirements, and a need for new skills within the organisation. A parametric model, described here, shows how a business might find out what they can expect if they pursue a remanufacturing strategy. Originally presented at ICoR 2011, the International Conference on Remanufacturing.
Supply Chain Management: Context, Collaboration and CompetitionRichard Farr
Why are supply chains as they are? Who decides what jobs a company should do, and which ones should be left to others? These slides encourage the learner to think about the company operations in their supply chain context, with reference to established principles such as Porter's Five Forces, and Brandenburger and Nalebuff's work on coopetition. Suggested student activities are included, and the presentation can be downloaded.
Giving feedback to students is often mutually unsatisfactory: it requires a great deal of time, yet it isn't always accessed. Can we do something better? This presentation was used to kick off a practitioner workshop back in 2014.
Environmental Impact of Cruise HolidaysRichard Farr
What is the environmental impact of a cruise holiday? The authors used Life Cycle Assessment (LCA) – a technique more commonly found in manufacturing and engineering – to examine the carbon footprint of a cruise holiday, and compare this to a conventional hotel stay... finding that cruising is the 21st century equivalent of wearing fur: luxurious, but morally questionable!
Presented at “Contemporary Perspectives in Tourism and Hospitality Research: Policy, Practice and Performance” 12-14 July 2015, University of Brighton
Full paper available on ResearchGate: https://www.researchgate.net/publication/280008702_A_Life_Cycle_Assessment_of_the_Environmental_Impact_of_Cruise_Holidays
Design for in-circuit test (vintage 1994)Richard Farr
This one is an oldie, so please excuse the visual style. It comes from the first year of my PhD studies, 1994. The guidelines shown may still be of use to somebody working in printed circuit board (PCB) design. IT’S PROBABLY BEST DOWNLOADED since it's meant to run as a rolling slideshow, and it achieves a crude form of animations via multiple slides...
File translation courtesy of Zamzar.com, which allowed me to salvage this very old file, and make it available. For the PhD thesis itself (1999), see http://usir.salford.ac.uk/34320/
Coopetition changes everything. Learn how to turn your competitors into 'complementors', and find "win-win" solutions in the modern business environment. Supported by examples, this short presentation explains the basic principles of how to secure a "bigger slice of the pie" even as you work to make the "pie" bigger for everybody.
The mantra of modern management in risk reduction, risk reduction, risk reduction... but what is risk, and how can managers make informed decisions about the hazards they (might) face? This presentation introduces students to some fundamental concepts, and methodologies, making reference to a boardgame that virtually everybody knows.
As a business, how can you reduce the impact of tourism, and ensure that you have access to visitor attractions for years to come? How can you defend yourself against critics, and how can you detect 'greenwash'? Finally, students apply what has been covered by planning a sustainable holiday.
You design for manufacture, design for assembly, design for reliability... why not design for logistics as well?
This presentation provides a theoretical background on the purposes of packaging, and the characteristics of products with good logistics properties. The efficiency of packaging strategies is discussed, and the influence of good relationships within the supply chain.
How can the complex supply chain for an aero engine respond to a request for quotation from an airline in just a week? This is the presentation that accompanied our ICE 2006 conference paper on aero industry virtual enterprises, legal issues and the "seven day proposal". One output from the EU Sixth Framework Integrated Project, VIVACE (Value Improvement through a VIRTUAL Aerospace Collaborative Enterprise).
Uses the ‘Da Vinci’ theme from Keynote Theme Park.
We are the stakeholders. All of us: you, me, governments, businesses and host communities... what happens in the tourism industry affects us all. This introductory lecture presents some of the key concepts in sustainable tourism, and reviews some of the problems that we face.
Don't let the natural and cultural wonders of our world be degraded by the people who love them and want to experience them: instead, discover sustainable solutions that benefit everyone.
Impacts of Cruise Tourism upon Small Island CommunitiesRichard Farr
Cruise holidays: love them or hate them... you can't deny that there are more people cruising than ever before. But is cruising ethical? Sustainable? Using the emerging destination of Chios as an example, we look at the impact that cruise ships have upon port communities, and the natural environment.
This is the conference presentation that accompanied our first research paper on the impact of cruise tourism, looking at a small island community in the Aegean.
For the full text of the accompanying paper, see: http://www.jotr.eu/index.php/tourism-management/64-understanding
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
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2. Contents
Quick recap of assembly.
The assembly planning activity.
Computer-based representation of constraints.
Assembly sequence generation and illustration.
Criteria for assembly sequence evaluation.
Conclusions and questions.
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3. Define the assembly planning task.
Appreciate the usefulness of Computer-Aided
Assembly Planning (CAAP).
Understand the requirements in assembly
modelling.
Be able to reason about an assembly with
geometric and technological constraints.
Know how to evaluate alternative sequences.
Learning Objectives
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4. What is Assembly?
The process of combining components into sub-
assemblies or finished products.
It can form a significant part of the overall
manufacturing process.
It has been estimated that it can account for
between 25 to 75 % of production costs and 40 to
60 % of production throughput time.
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5. What is Assembly Planning?
“The act of preparing the detailed instructions for
the assembly of a product.”
Assembly Planning includes...
Evaluating the processes and operations that
might be employed.
Selecting tooling and fixtures, etc.
Determining the sequence of operations.
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6. Why?
Most products are assemblies.
Process planning only addresses the operations
that produce individual components.
Very few companies have design control over
every component they use.
Assembly planning allows us to anticipate
problems and solve them before they happen for
real on the factory floor.
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7. Why Computer-Aided Assembly
Planning?
The planning task is time-consuming and prone to
errors.
The time cost of planning.
Engineers cannot examine all the possible plans.
Computerised tools can ensure that no good
assembly plan has been overlooked.
CAAP allows the flexibility to handle changes in
available equipment.
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9. Assembly Models
A description of the assembly
for input to planning.
Part models (geometry and
other details of individual
components).
The spatial relations
between components.
Details of the connections
between components.
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13. Assembly modelling
Place the base component.
Add further parts, locating them using various
types of constraint. For example:
Mate. (Two surfaces that will touch in the
final assembly.)
Align. (Two planes coincident and facing in
the same direction.)
Insert. (Used to insert a revolved surface into
another on the same axis.)
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14. Useful information available within
the CAD model
Extraction of additional data from component
and assembly models...
Mass properties (weight and centre of
gravity).
Clearance and interference calculations.
Bill of materials.
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15. Reasoning about the Assembly
Model
Aim: to determine information not held within
the assembly model itself.
Main task: to identify precedence constraints:
Geometric constraints.
Technological constraints.
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17. Technological constraints
Constraints due to the technology used to
assemble components.
Typically associated with standard
fastening methods (for example, screws
and clips).
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18. The Problem
Like all manufacturing planning tasks, time is
limited and experts are in short supply.
The magnitude of the job: how many assembly
sequences must be evaluated?
The number of potential sequences rises
exponentially with the number of parts in the
assembly.
“The Combinatorial Explosion...”
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21. Sequence Generation Problem
Fortunately, not all combinations are possible.
Some can be eliminated early, because they are
physically impossible.
Let’s use a simple example to see how possible
assembly sequences can be found.
A ballpoint pen has five components (we’ll call
them body, nib, tube, cap and button).
How many assembly sequences?
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32. Alternative representation: the
AND/OR graph
Each node is a feasible
subassembly.
All possible
decompositions of the
product are shown.
The pair of lines leading
away from each box is
known as a ‘hyper-arc’
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33. Assembly Sequence Generation
Four main options:
Forward planning
Backward planning
Plan re-use
Rule-based expert systems
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36. 3. Plan re-use
The process of generating complete sequences
from scratch can be avoided by reusing previously
created plans.
Similar to the hybrid approach in CAPP, this uses an
expert system technique known as ‘Case-Based
Reasoning’ (CBR).
Aims to solve new problems by using knowledge
gained from solving similar problems in the past.
This knowledge is held in the form of problem
solutions or ‘cases’ held in a database.
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37. 4. Rule-based systems
These systems are based on a more conventional
expert system technique, using rules to
represent the planning knowledge, and an
inference engine to perform the reasoning
process to search for a solution.
The rules are in an “IF ... THEN” format, such
that if the predicate is true then the conclusion
is drawn.
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38. Sequence Evaluation
Even after assessing geometric and technological
constraints, many feasible sequences might
remain.
Additional criteria are used to find an optimum
sequences – or at least, a set of alternatives that
are “good enough”.
Additional criteria (sometimes called strategic
constraints) can be:
Qualitative or quantitative.
Product, technology or company specific.
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40. Risk Reduction Strategy...
Fit valuable components as late as possible.
Fit fragile components as late as possible.
Perform irreversible operations as late as
possible.
Perform precise adjustments as late as possible,
and watch out for dependencies between
tolerances.
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41. Operational Flexibility Strategy...
Aim for maximum flexibility when designing the
assembly system.
Assembly operations that introduce ‘special’ or
unique components... configure the product as
late as possible.
Parallelism of operations: can several jobs be
done at one time?
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43. Compatibility Strategy...
Aim to meet known or predicted assembly
system requirements:
Match the sequence to the assembly line
configuration.
Aim to produce ‘required subassemblies’ at
the right stages.
Avoid unwanted subassemblies.
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44. In summary
An important concurrent engineering activity,
particularly when viewed in the context of
globalisation.
Assembly has a considerable influence over
product cost, time and quality.
Computer-Aided Assembly planning is necessary, in
order to deal with the huge number of
permutations that are possible.
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45. Recap of
Procedure
Drawings or model
Geometric reasoning
Conceptual plan or plans
Revise, based on experience
and the production system
Evaluate for practicality
Issue assembly plans
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46. Define Assembly Planning.
Draw a flowchart showing the typical manual
assembly planning activity.
What are the problems with manual assembly
planning?
Why does CAAP offer a valuable alternative?
Review Questions (1)
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47. Review Questions (2)
Describe four different techniques for assembly
sequence generation.
Explain the two methods used to represent assembly
sequences pictorially. Choose a product of four to five
components and represent it using each method.
(Refer to the ballpoint pen assembly example.)
List the four categories of sequence evaluation criteria,
and describe the effect each has on sequence
selection.
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48. Further information from Richard Farr can be found
on Capacify, the Sustainable Supply Chain blog
http://capacify.wordpress.com
On Twitter: @Capacified