Evaluation and Improvisation of Overall Equipment Effectiveness in a Sheet Metal Parts Manufacturing Industry

2020 ◽  
pp. 221-235
Author(s):  
Abhaya M. Borkar ◽  
Atul B. Andhare
Keyword(s):  
Sheet Metal ◽  
Manufacturing Industry ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Parts Manufacturing

Hierarchical representation and similarity assessment for reuse of sheet metal parts

2017 ◽  
Vol 232 (2) ◽  
pp. 328-338
Author(s):  
Zhi Li ◽  
Xionghui Zhou ◽  
Wei Liu
Keyword(s):  
Sheet Metal ◽  
Manufacturing Industry ◽  
3D Models ◽  
Product Model ◽  
Hierarchical Representation ◽  
Metal Parts ◽  
Similarity Assessment ◽  
Sheet Metal Parts ◽  
Manufacture Process ◽  
Attributed Graph

Sheet metal parts are widely used in the manufacturing industry. With the number of 3D models increasing, it is essential to retrieve existing resources. Effective similarity assessment would be useful in many downstream applications, such as design reuse and manufacture process revision. We propose a hierarchical representation and similarity assessment algorithm to retrieve 3D models of sheet metal parts. Based on single-side representation extracted from solid models, flat and bent faces are recognized and clustered into groups. The morphological relationship between these two groups is then described and an attributed graph is built to store the connection between flat groups. A hierarchical representation is derived by a simplification and assembly process. This structure supports similarity assessment in different levels of detail; thus, a multiple-resolution formula is introduced to measure the total similarity. The algorithms were implemented based on a neutral standard for the exchange of product model data (STEP) format and a prototype demonstrates the application in shape search and reuse in manufacturing industry.

Experimental and Numerical Analysis of Blanking for Thin Sheet Metal Parts

2001 ◽  
Vol 4 (3-4) ◽  
pp. 319-333
Author(s):  
Vincent Lemiale ◽  
Philippe Picart ◽  
Sébastien Meunier
Keyword(s):  
Numerical Analysis ◽  
Sheet Metal ◽  
Thin Sheet ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Thin Sheet Metal

A Feature-based Group Technology Coding System for Sheet Metal Parts

1991 ◽  
Vol 2 (3) ◽  
pp. 263-279 ◽  
Author(s):  
James F. Kimpel ◽  
Larry G. Richards
Keyword(s):  
Sheet Metal ◽  
Group Technology ◽  
Coding System ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Feature Based

Analysis of Nonlinear Variation Accumulation in Auto-Body Assembly Process

Manufacturing ◽  
2002 ◽  
Author(s):  
Jun Lian ◽  
Zhongqin Lin ◽  
Fusheng Yao ◽  
Xinmin Lai
Keyword(s):  
Sheet Metal ◽  
State Equation ◽  
Assembly Process ◽  
Transformation Mechanism ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Accumulation Mechanism ◽  
Auto Body ◽  
Non Gaussian ◽  
Geometrical Dimensions

In the assembly process of auto-body, variations in the geometrical dimensions of sheet metal parts and fixtures are inevitable. These variations accumulate through the multi-station assembly process to form the dimensional variations of the final products. Compared with the assembly of rigid parts, the assembly process of the elastic parts is more complex because the variation accumulation patterns rely much on the variations of fixture, jointing methods and mechanical deformation. This paper aims at analyzing the variation transformation mechanism and accumulation characteristics for the assembly of sheet metal parts based on the analysis of dimensional coordination relations among parts and fixtures. Finite element method (FEM) and Monte-Carlo Simulation (MCS) were used to analyze the effect of jointing contact on variation transformation, while a state equation was developed to describe the variation accumulation mechanism. The result of the analysis indicates that the main characteristics of elastic assembly jointing are the overlap jointing methods and elastic contacts action. The fact that the variation transform coefficients (VTC) are variable makes the assembly variation distribution Non-Gaussian even if the dimension variation of parts is Gaussian distribution. The analysis conclusions have potential value for more reasonable tolerance synthesis of elastic parts assembly.

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