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Numerical simulation of the influence of air bending tool geometry on product quality

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Title Numerical simulation of the influence of air bending tool geometry on product quality
 
Creator SINGH, UP
MAITI, SK
DATE, PP
NARASIMHAN, K
 
Subject air bending tool
spring back
metal forming
 
Description The quality of a bend is determined by the accuracy and consistency of the angle along the length of the part. This accuracy is directly related to the penetration of the tool in the die. Small variations in tool penetration can cause relatively large changes in bend angle. Such variations are caused by changes in the repeatability of the tool stopping point, by deflections of the press brake beams and by distortions of the tooling. Earlier studies [Int. J. Mech. Sci. 22 (1980) 583; J. Mater. Process. Technol. 35 (1992) 129; Precision bending of sheet metal, Master's Thesis, University of Twente, 1992; A finite element simulation of free bending, in: Proceedings of the Second International Sheet Metal Conference, SheMet'94, University of Ulster, 1994, pp. 201-211] on finite element modelling of the air bending process assume that the tooling is perfectly rigid. The present 3D finite element model of press brake air bending tools allows calculation of elastic distortions in typical tools and relates the distortion to the accuracy of the formed part. The finite element model has been validated by experiments conducted on a commercial press brake. Some suggestions are made for improvements to the direct and cross stiffness of the tools which should lead to improved alignment of the tool and die and, in turn, to improved product accuracy. (C) 2003
 
Publisher ELSEVIER SCIENCE SA
 
Date 2011-07-28T14:29:55Z
2011-12-26T12:59:42Z
2011-12-27T05:52:24Z
2011-07-28T14:29:55Z
2011-12-26T12:59:42Z
2011-12-27T05:52:24Z
2004
 
Type Article
 
Identifier JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 145(3), 269-275
0924-0136
http://dx.doi.org/10.1016/S0924-0136(03)00443-6
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7426
http://hdl.handle.net/10054/7426
 
Language en