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This document provides an overview of a seminar on the design of rolling-friction power screws (ballscrews) presented by students at Savitribai Phule Pune University. The seminar covers the history of ballscrews, introduces their classification, circulation, design considerations including preload calculation and stiffness. It discusses advantages like efficiency and smooth operation, disadvantages like cost and critical speed issues. Applications mentioned include automobile steering gears, CNC machines and aircraft landing gear. The conclusion discusses analytical models for friction torques and efficiency in ballscrew systems.
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Fabrication hand crank system for elevations with screws jack, building crank...
Shaft design2 Erdi Karaçal Mechanical Engineer University of Gaziantep
Shaft design2 Erdi Karaçal Mechanical Engineer University of Gaziantep
Similar to design of rolling power screw - Copy
IRJET- Review on Comparative Analysis of Ball Screw & Lead Screw
This document compares and contrasts ball screws and lead screws. It discusses the basic functions and designs of each type of screw. A ball screw uses balls to minimize friction and maximize efficiency, but has a more complex design. A lead screw has lower friction between sliding surfaces and is more compact and flexible in design. While lead screws have lower costs and simpler designs, ball screws can achieve higher stiffness, thrust capacity, and accuracy required for some applications. The document provides details on the advantages and disadvantages of each type of screw.
IRJET- Computer Aided Modeling and Analysis of Non-Circular Hollow Cross-Sect...
This document presents a study analyzing non-circular hollow cross-section helical springs using computer-aided modeling and finite element analysis. Various spring profiles including circular, rectangular, pentagonal, and hexagonal hollow cross-sections were modeled in SolidWorks and their deformation and maximum shear stress were calculated and compared under a 3000N static load using ANSYS. The results showed that the rectangular hollow cross-section spring had the highest deformation of 64.656mm while the pentagonal hollow cross-section spring had the least deformation of 47.488mm. Additionally, the hexagonal hollow cross-section spring produced the highest maximum shear stress of 5424.1MPa, while the pentagonal hollow cross-section spring produced the lowest
IRJET- Determination of Fatigue Life of Sintered Inner Ring used in Multi...
This document discusses replacing the conventional forging process and structural steel material for manufacturing reaction cones in multi-cone synchromesh transmissions with sintering and sintered steel to reduce costs. Finite element analysis found the sintered steel reaction cone acceptable for static loading. Transmission rig testing also validated the sintered reaction cone functionally. Preliminary calculations indicate the sintered steel reaction cone can reduce costs by 30% compared to the conventional forged steel design.
WAVE GEAR
This document summarizes the key components and operating principles of a wave gear drive system. It discusses how wave gear drives provide advantages over traditional gearing systems such as zero backlash, high torsional stiffness, and high positional accuracy. The main components of a wave gear drive are the flex spline, wave generator, and circular spline. The wave generator causes deformation of the flex spline to partially engage and disengage its teeth with the circular spline's teeth, allowing for gear reductions. Wave gear drives have applications in aerospace, machine tools, medical equipment, printing presses, robots, and more due to their flexible design and performance advantages.
IRJET- Review Paper on Analytical and Finite Element Analysis of Spur Gears
This document reviews analytical and finite element analysis methods for studying stresses in spur gears. It begins with an abstract that describes investigating contact stresses, bending stresses, and transmission errors in gear systems using finite element models. The document then provides a literature review of several past studies analyzing gear stresses through analytical methods, finite element analysis, and experimental testing. It concludes that the most accurate approach involves using fundamental equations, finite element simulations, and physical testing to validate numerical results.
IRJET- Analysis of Stress and Bending Strength of Involutes Spur Gears with F...
This document analyzes and compares the bending stress and strength of asymmetric and symmetric spur gear profiles through finite element analysis. It develops a computer program to estimate the variation of maximum bending stress and contact ratio based on tooth number and drive side pressure angle for asymmetric gears. The FEM analysis shows that asymmetric teeth have lower bending stress than symmetric teeth. It also confirms that increasing the drive side pressure angle decreases bending stress and increases load capacity. While the maximum bending stress value changes with the gear profile, the location of maximum bending stress remains the same in FEM analysis for both asymmetric and symmetric gears. The document concludes that optimizing the fillet profile of asymmetric gears can further reduce bending stress levels.
ANALYSIS OF STRESS RELIEVING FEATURES OF ASYMMETRIC SPUR GEAR
This document analyzes stress relieving features of asymmetric spur gears through finite element analysis and experimental testing. It begins with an introduction to gear technology, gear classifications, and the importance of asymmetric gears. It then describes the objectives of analyzing stress relieving circular holes. The methodology includes modeling gears in CATIA and analyzing stresses in ANSYS. Results show adding circular holes, particularly at the tooth center, reduces maximum principal stress compared to simple spur gears. Experimental strain gauge tests validate the FEA results. The study concludes circular stress relieving features are effective at redistributing stress and improving gear strength and durability.
IRJET- Design and Analysis of Chain Drive Power Transmission from Station...
This document describes the design and analysis of a chain drive power transmission system that can transmit power from a stationary source to oscillating devices. The system uses a modified chain with conical teeth that can automatically slide and lock into conical sockets on a driven wheel as the wheel oscillates between -45° and +45°. The design includes a chain section, driver section, and driven section. An analysis of the chain section was conducted using ANSYS software to evaluate stresses and ensure optimal performance. The results show this alternating transmission system can replace machines using multiple drives with a single drive and has applications where power needs to be transmitted to oscillating mechanisms.
IRJET- Sensitivity Analysis Study of CVT Parameters using Mathematical Model
This document presents a mathematical model to analyze the sensitivity of continuously variable transmission (CVT) parameters. It discusses the components of a CVT system including V-belts and variable diameter pulleys. The methodology describes developing equations for the primary actuator using centrifugal force on rollers, the V-belt geometry, and the secondary actuator incorporating a helical spring. The results section shows the mathematical model was verified against dynamometer test data and found to be comparable, indicating it can be used to study effects of varying CVT parameters on vehicle performance.
IRJET- Effect of Vibrations on Various Systems of Helicopter and its Maintena...
This document summarizes a study that assessed the effect of vibration on helicopter subsystems, reliability, maintainability, and life-cycle costs. The study compared two groups of Indian Navy Advanced Light Helicopters (ALH/Dhruv) - one equipped with a rotor-mounted vibration absorber that reduces vibration, and one without the absorber. Analyses showed the helicopters with absorbers had a 48% lower failure rate, 38.5% lower corrective maintenance costs, and 10% lower life-cycle costs. At the subsystem level, most components also saw these reductions except some avionics. The results suggest reducing vibration can significantly improve reliability and reduce costs, and may extend the useful life of aircraft.
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The flow through the turbine components is associated with energy losses and hence energy
output from turbine is always less than the input energy. The global performance of turbine is
characterized by its overall efficiency. The casing has spiral shape and hence has swirling flow and
flow is subjected to frictional and vortex losses. The passage in stay ring and distributor has solid
vanes and flow passes through the ducts between the vanes is subjected mostly frictional losses.
Since runner is the most important component of mixed flow turbine and its design i.e. the blade
profile, number of blades plays vital role in overall performance of turbine at all operating regimes.
In the present work the numerical simulation of hydraulic Francis turbine is carried out by using
ANSYS software. The losses in each part of turbine are computed at different operating conditions
by changing the solidity of existing runner. The numerical results for efficiency of existing runner
are validated with experimental values. This study can be used efficiently as a reliable tool for
the practical design and performance analysis of Francis hydraulic turbines.
ANALYSIS OF DAMPING COEFFICIENT FOR VISCOUS DAMPER
Project aim is contribute in torsional vibration th eory and their practical experiences used in damper s which are widely used in automobile application & civil applications. Projec t is sponsored by �Hodek vibration Technologies pvt ltd�,pune. This is largest dampers manufacturer of torsional vibration dampers for diesel engines. This report paper high lights a number of important considerations for the torsional viscous damper system as well as design philosophies to ass ess and mitigate the risk of torsional failures. Damping properties are of si gnificant importance in determining the dynamic res ponse of structures,and accurate prediction of them at the design stage,es pecially in the case of light-weight,wind-sensitiv e buildings,is very desirable. Unfortunately,damping parameters cannot be deduced deterministically from other structural properties and recourse is generally made to data from experiments conducted o n completed structures of similar characteristics. Such data is scarce but valuable,both for direct use in design and for fur thering research into the phenomenon of damping.
Comparison of Bending Stresses in Involute and Cycloidal Profile Spur Gear Tooth
The document compares the bending stresses in involute and cycloidal profile spur gears using finite element analysis. Gear models with different modules are created in Creo Parametric software and analyzed in ANSYS. The results show that bending stress decreases with increasing module and is lower for involute gears compared to cycloidal gears of the same module. Involute gear teeth experience less bending stress and are stronger than cycloidal gear teeth. The finite element analysis results are slightly different but comparable to values obtained from Lewis equation.
Multi degree of freedom mechanism for multiple application
This document describes a new multi-degree of freedom mechanism using innovative spherical gears. It consists of a cross spherical gear (CS-gear) supported by a holder and driven by two monopole gears (MP-gears). The MP-gears each drive two degrees of freedom, allowing the mechanism to actively drive three rotational degrees of freedom without slippage. This overcomes limitations of previous designs. The mechanism provides high torque transmission, position accuracy, and a flexible configuration compared to complex existing designs like spherical motors. Key challenges include manufacturing the complex gears, designing the holder for a large range of motion, and ensuring proper gear meshing and backlash.
A review on design and development of eccentric shaft for cotton
This document provides a review and discussion of eccentric shafts, which are important components used in cotton ginning machines to provide oscillatory motion. Eccentric shafts are circular or cam-shaped disks attached off-center to a rotating axle. They are widely used in industries like cotton ginning where their small eccentric distance results in low friction loss and high efficiency. The document discusses the design, operation, and factors that affect the life of eccentric shafts, such as load, geometry, materials, and wear. It also reviews various studies on topics like eccentric mechanisms, eccentricity-related faults, vibration control of eccentric rotors, and designs of eccentric shafts in applications like pumps and robots. The goal of the document is
IRJET- Modification of Root Fillet Profile for Optimum Gear Life
1. The document discusses the modification of root fillet profiles in spur gears to optimize gear life and reduce failure from pitting.
2. Finite element analysis is conducted in ANSYS on spur gear models with varying root fillet radii. Maximum contact stresses and deformations are compared for different fillet profiles.
3. Experimental analysis is also carried out using the photoelastic method to validate the finite element results. Optimizing the root fillet profile can help improve the strength of gears and increase gear life.
IRJET- Development of Winch Machine For Erection of Transmission Tower –A Review
This document reviews the development of a winch machine for erecting transmission towers. It begins with an introduction to winch machines and their components. It then discusses three common methods for tower erection - manual, motorized winch, and helicopter - and their limitations. The document conducts a literature review on winch design improvements and analyses components like drums and ropes. It concludes that a specially designed tractor PTO-driven winch could help overcome limitations and increase safety during tower erection.
IRJET- Design and Experimental Testing of a Two-Terminal Mass Device with a V...
This document describes the design and testing of a two-terminal mass device with a variable moment of inertia flywheel for use in vehicle suspensions. A conventional suspension uses springs and dampers, while this device aims to incorporate a mass in a two-terminal configuration to provide damping. It presents a proposed design of a flywheel with sliders that can change the moment of inertia in response to driving conditions. Experimental testing showed the variable moment of inertia design outperformed a fixed moment of inertia design in reducing body movement and improving ride comfort. Future work could include linearization and control of the system response as well as reducing friction within the device.
FEA OF A CRANKSHAFT IN CRANK-PIN WEB FILLET REGION FOR IMPROVING FATIGUE LIFE
A crankshaft is often designed with a fillet radius to improving fatigue life of crankshaft. The fatigue life of crankshaft is depend on the proper fillet radius. This fillet radius is changes than fatigue life is also changes of crankshaft. In most of the time fatigue failure is occur in crank-pin web fillet region. The crankshaft fillet rolling process is one of the commonly adopted methods in engineering to improve fatigue life of the crankshaft. A finite element analysis is implemented to approximate the stress distribution induced in the crankpin fillet region. The modelling of crankshaft is created by Creo-parametric. Finite element analysis is performed to obtain the variation of stress at critical locations and fatigue life of the crank shaft using the ANSYS software and applying th e boundary conditions. Radius of fillet is changes in model of crankshaft to improvement in fatigue life. Th is work in doing for optimization of a crankshaft in crank-pin web fillet region with fatigue life as well as to study a relation between fillet radius/diameter of crankpin to fatigue life. .
IRJET- Experimental Stress Analysis of Worm Wheel used in Crate Washer Gearbox
This document describes an experimental stress analysis of a worm wheel used in a gearbox for a crate washer. The gearbox was experiencing failures of the worm wheel teeth due to excessive bending stresses. Both theoretical and experimental analyses were conducted. The theoretical analysis used Lewis' equation to calculate bending stresses. The experimental analysis used photo stress methods to directly measure stresses by applying loads that simulated actual operating conditions and observing colored fringe patterns with a polariscope. This allowed quantification of stresses at points of high stress. The analyses found the worm wheel's material and geometry were improperly selected for the application, leading to failures. The worm wheel was then redesigned with new material and geometry suitable for the required working conditions.
Similar to design of rolling power screw - Copy (20)
IRJET- Review on Comparative Analysis of Ball Screw & Lead Screw
IRJET- Review on Comparative Analysis of Ball Screw & Lead Screw
IRJET- Computer Aided Modeling and Analysis of Non-Circular Hollow Cross-Sect...
IRJET- Computer Aided Modeling and Analysis of Non-Circular Hollow Cross-Sect...
IRJET- Determination of Fatigue Life of Sintered Inner Ring used in Multi...
IRJET- Determination of Fatigue Life of Sintered Inner Ring used in Multi...
IRJET- Review Paper on Analytical and Finite Element Analysis of Spur Gears
IRJET- Review Paper on Analytical and Finite Element Analysis of Spur Gears
IRJET- Analysis of Stress and Bending Strength of Involutes Spur Gears with F...
IRJET- Analysis of Stress and Bending Strength of Involutes Spur Gears with F...
ANALYSIS OF STRESS RELIEVING FEATURES OF ASYMMETRIC SPUR GEAR
ANALYSIS OF STRESS RELIEVING FEATURES OF ASYMMETRIC SPUR GEAR
IRJET- Design and Analysis of Chain Drive Power Transmission from Station...
IRJET- Design and Analysis of Chain Drive Power Transmission from Station...
IRJET- Sensitivity Analysis Study of CVT Parameters using Mathematical Model
IRJET- Sensitivity Analysis Study of CVT Parameters using Mathematical Model
IRJET- Effect of Vibrations on Various Systems of Helicopter and its Maintena...
IRJET- Effect of Vibrations on Various Systems of Helicopter and its Maintena...
ANALYSIS OF DAMPING COEFFICIENT FOR VISCOUS DAMPER
ANALYSIS OF DAMPING COEFFICIENT FOR VISCOUS DAMPER
Comparison of Bending Stresses in Involute and Cycloidal Profile Spur Gear Tooth
Comparison of Bending Stresses in Involute and Cycloidal Profile Spur Gear Tooth
Multi degree of freedom mechanism for multiple application
Multi degree of freedom mechanism for multiple application
A review on design and development of eccentric shaft for cotton
A review on design and development of eccentric shaft for cotton
IRJET- Modification of Root Fillet Profile for Optimum Gear Life
IRJET- Modification of Root Fillet Profile for Optimum Gear Life
IRJET- Development of Winch Machine For Erection of Transmission Tower –A Review
IRJET- Development of Winch Machine For Erection of Transmission Tower –A Review
IRJET- Design and Experimental Testing of a Two-Terminal Mass Device with a V...
IRJET- Design and Experimental Testing of a Two-Terminal Mass Device with a V...
FEA OF A CRANKSHAFT IN CRANK-PIN WEB FILLET REGION FOR IMPROVING FATIGUE LIFE
FEA OF A CRANKSHAFT IN CRANK-PIN WEB FILLET REGION FOR IMPROVING FATIGUE LIFE
IRJET- Experimental Stress Analysis of Worm Wheel used in Crate Washer Gearbox
IRJET- Experimental Stress Analysis of Worm Wheel used in Crate Washer Gearbox
design of rolling power screw - Copy
- 1. A Seminar on Design of Rolling-Friction Power screw (Ballscrew) Savitribai Phule Pune University Department of Technology Pune Presented by : Shinde S. M. (MM15M09) Jadhav Nilesh (MM15M13) EXPERIMENTAL STUDY ON BALL SCREWS “International Conference on Diagnosis and Prediction in Mechanical Engineering Systems, 2009 by Galati, Romania (XV), ISSN 1221-4590, Issue 1 TRIBOLOGY Guided by : Dr. Rachaiya
- 2. HISTORY OF BALL SCREWS There have been attempts to replace sliding friction screws with rolling friction screws since the 19 century. The first practical application of ball screws was by General Motors, who used ball screws for their steering columns. Since then the technology surrounding ball screws has advanced rapidly. Then used in CNC machines, automated manufacturing, and medical devices. With superior accuracy, repeatability, and high efficiencies ball screws are the best way to translate rotational motion into linear motion
- 3. INTRODUCTION The primary function is ball screw is convert rotary motion to linear motion. The Surface of the screw and nut are separated by Ball. The screw and nut have approximately semi circular thread profile.
- 4. CLASSIFICATION OF BALL SCREW CIRCULATION A) External recirculation
- 8. DESIGN Preload Calculation
- 9. Variable load and constant speed
- 10. A) Common transmission (rotary-linear) B) Reverse transmission (linear-rotary)
- 14. STIFFNESS An indication of the rigidity of a machine. Total stiffness of the machine feed system.
- 15. THE STIFFNESS OF BALL SCREW
- 16. The Stiffness Of The Nut calculated by,
- 18. ADVANTEGES Efficiency is as high as 90% The operation is smooth when compared to other type of screw A ball screw is virtually wear free due to the presence of lubricating film. Load carrying capacity is more light weight. DISADVANTEGES Costly. Overhauling due to low friction. Separate brakes are used to hold the load. Bucking of screw and critical speed are serious problems. Require high degree of cleanliness.
- 19. APPLICATION Automobile steering gear. Power actuator. CNC machine. Aircraft landing gear retractor. Transport machinery.
- 20. CONCLUSION Based on the equilibrium of the forces and moments acting on the ball, the sliding forces between ball and both screw and nut in a ball - screw system was determined without an integrating of the shear stress on contact ellipses. A general analytical model for friction torques and efficiency in a ball screw system has been developed . The analytical model includes influence of the rotational speed, axial load, lubricant viscosity and geometry of the ball- screw system. The developed model leads to realistic values both for the friction torque and for the efficiency of a ball – screw system. A relation for the global friction coefficient has been proposed. So, it can be determined a global friction coefficient in a ball screw - system,
- 21. REFRANCE Journal on basic of AUGUST 2014 screw drive rod less actuators –by- Igo glikin, senior Mechanical Engineer, tolomatic,inc -http;//goo.gl//TMEOzn www.rockwellautomation.com/go/tolomatic. International Conference on Diagnosis and Prediction in Mechanical Engineering Systems (DIPRE’09)22 - 23 October 2009, Galati, Romania Ball screw broacher by industrial motion control system www.hiwin.tw Ball Screws. Technical Catalogue, Korta, available onlineat:http://www.kortasa.com/uploads/descargas/ CASTELLANOINGLES.pdf
- 22. Thank you!