3 sensitivity analysis equations 2 and 5 represent

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Unformatted text preview: lows to point out possible improvements in the process plan, and most importantly, to predict the achievable dimensional accuracy of complex bent parts. Keywords: tolerance verification, sheet metal bending, quality analysis 1. INTRODUCTION Bent parts are produced on press brake machines by folding flat patterns cut out from metal sheets. During the process, workpieces are positioned against backgauges before being bent linearly by means of a punch penetrating in a V-die. While tolerances have been a traditional concern in manufacturing processes and aspects related to tolerance verification have been rather well defined for conventional processes, studies dedicated to tolerance issues in process planning for non-conventional processes such as sheet metal bending have only been initiated in recent years Similar to conventional manufacturing processes, tolerances have been used as a drive for operation planning, often referred to as bend sequencing, in sheet metal bending. In the first instance, rules helped to drive the search for a bending sequence 341 J.K. Davidson (ed.), Models for Computer Aided Tolerancing in Design and Manu...
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This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.

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