Optimization of Modular Fixture Layout by Minimizing Work-piece Deformation

Fixture is a work-holding or supporting device used in the manufacturing industry to hold the workpiece. Fixtures are used to securely locate (position in a specific location or orientation) and support the work, ensuring that all parts produced using the fixture will maintain conformity and interchangeability. The location of fixture elements is called as fixture layout. The fixture layout plays major role in the work piece deformation during the machining operation. Hence optimization of fixture layout to minimize the work piece deformation is one of the critical aspects in the fixture design process. Minimization the workpiece deformation which is the objective function in the present work is calculated using Finite Element Method (FEM) and the fixture layout is optimized using Discrete fixture layout optimization method (DFLOM), Continuous fixture layout optimization method (CFLOM) and Integrated fixture layout optimization method (IFLOM).The workpiece deformation is minimum in Particle Swarm Optimization (PSO) based IFLOM is reported for the selected fixture. In this paper the PSO is used as an optimization tool to optimize the workpiece deformation.

Download Full-text

Zonal Compensation for Work-Piece Elastic Deformation through Fixture Layout Optimization

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.26-28.854 ◽

2010 ◽

Vol 26-28 ◽

pp. 854-857 ◽

Cited By ~ 4

Author(s):

Zhao Liang Jiang ◽

Yu Mei Liu ◽

Yun Xiao Shan

Keyword(s):

Elastic Deformation ◽

Optical Measurement ◽

Layout Optimization ◽

Work Piece ◽

High Definition ◽

Zonal Distribution ◽

Accuracy Requirement ◽

Fixture Layout ◽

Surface Flatness ◽

Fixture Layout Optimization

Work-piece elastic deformation caused by clamping force from fixture will lead to part bending or distorting, which is critical to lower its quality performance. In this paper, a novel zonal compensation method is proposed to compensate the work-piece elastic deformation through fixture layout optimization based on High Definition Metrology (HDM). The zonal surface flatness data of work-piece in fixture is obtained with densely optical measurement firstly. Then, they are reorganized according to the accuracy requirement based on the zonal distribution. Finally, the surface flatness compensation model based on fixture layout is made. The practicality and effectiveness of this new approach was verified using the case of Aluminum alloy 6061 part milling.

Download Full-text

Investigation of influence of fixture layout on dynamic response of thin-wall multi-framed work-piece in machining

International Journal of Machine Tools and Manufacture ◽

10.1016/j.ijmachtools.2013.09.008 ◽

2013 ◽

Vol 75 ◽

pp. 87-99 ◽

Cited By ~ 21

Author(s):

Xiao-Jin Wan ◽

Yan Zhang ◽

Xin-Da Huang

Keyword(s):

Dynamic Response ◽

Work Piece ◽

Thin Wall ◽

Fixture Layout

Download Full-text

Optimization of Modular Fixture Layout by Minimizing Work-piece Deformation

10.21203/rs.3.rs-87234/v1 ◽

2020 ◽

Author(s):

Muhammad Mohsin Rashid ◽

Awais Ahmed Khan ◽

Muhammad Qasim ◽

Muhammad Waqas ◽

Muhammad Ammar ◽

...

Keyword(s):

Parametric Design ◽

Research Work ◽

Machining Process ◽

Work Piece ◽

Maximum Deformation ◽

Fixture Layout ◽

Empirical Relations ◽

Force Moment ◽

Machining Fixtures ◽

Fixture Configuration

Abstract Machining fixtures are utilized to locate and restrain a workpiece during different manufacturing processes. The workpiece must be properly located and clamped in order to have it to be manufactured according to the prescribed dimensions and tolerance. The real motive of fixture design is to maximize locating accuracy and workpiece firmness while minimizing deformations. The purpose of this research work is to conduct a multi-objective optimization in order to minimize workpiece deflections due to clamping forces and optimized fixture layout by taking into consideration the boundary conditions and loads applied during a machining process. The locators are employed in a 3-2-1 fixture configuration. Then the empirical relations are used to calculate the machining forces and moments generated during drilling and milling processes and after that the workpiece is loaded to model those cutting forces. ANSYS parametric design language (APDL) code which made use of sub-approximation method is utilized to automatically optimize locator and clamp positions. Afterwards the clamping forces are being optimized using balancing force-moment method. Lastly, the maximum deformation of the workpiece against the optimum clamping forces is found by harmonic analysis.

Download Full-text

Mathematical analysis of stress criteria in the interior of a heated translating work piece

International Congress on Applications of Lasers & Electro-Optics ◽

10.2351/1.5059488 ◽

2000 ◽

Author(s):

John Dowden ◽

Phiroze Kapadia

Keyword(s):

Mathematical Analysis ◽

Work Piece ◽

Stress Criteria

Download Full-text

ELECTROLESS NICKEL

Alloy Digest ◽

10.31399/asm.ad.ni0332 ◽

1986 ◽

Vol 35 (4) ◽

Keyword(s):

Nickel Coating ◽

Chemical Reduction ◽

Electroless Nickel ◽

Heat Treating ◽

Corrosion And Wear ◽

Sodium Hypophosphite ◽

Work Piece ◽

Nickel Ions ◽

Continuous Contact ◽

Chemical Corporation

Abstract ELECTROLESS NICKEL is a nickel coating deposited by chemical reduction of nickel ions. The most widely used reducing agent is sodium hypophosphite. The thickness of the deposited coating is uniform over all areas of the work-piece that are in continuous contact with fresh plating solution. The process is applicable to a wide variety of metal and nonmetal substrates. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion and wear resistance as well as heat treating and joining. Filing Code: Ni-332. Producer or source: Occidental Chemical Corporation.

Download Full-text