Development of an expert system for cold forging of axisymmetric product
This paper deals with an automated computer-aided process planning and die design system by which the designer can determine operation sequences even if they have little experience in process planning and die design for axisymmetric products. An attempt is made to link programs incorporating a number of expert design rules with the process variables obtained by commercial FEM softwares, DEFORM and ANSYS, to form a useful package. The system is composed of four main modules. The process planning and the die design modules consider several factors, such as the complexities of preform geometry, punch and die profiles, specifications of available multi-former, and the availability of standard parts. They can provide a flexible process based on either the reduction in the number of forming sequences by combining the possible two processes in sequence, or the reduction of deviation of the distribution on the level of the required forming loads by controlling the forming ratios. In the die design module optimal design technique and the horizontal split of the die insert were investigated for determining appropriate dimensions of components of the multi-former die set. It is suggested that the proposed method can be beneficial for improving the tool life of the die set in practice.
KeywordsDie design Extrusion Process planning Split insert
Unable to display preview. Download preview PDF.
- 3.Lange K (1967) Handbook of metal forming. McGraw-Hill, New YorkGoogle Scholar
- 5.Kim HS, Im YT (1994) Expert system for process design of cold forging with redesigning scheme. Trans KSME 18(8):2039–2052Google Scholar
- 6.Park CW, Kang JH, Lee JH, Kim C, Kim MS, Choi JC (2003) A study of automated process planning and die design for multi former-bolt products. J Korean Soc Precis Eng 20(4):29–38Google Scholar
- 7.Kuhn HH (1978) Optimum die design for powder compaction. Int J Powder Technol 14(8):259–275Google Scholar
- 8.An SC, Im YT (2002) Optimal design of dimension of extrusion die with single stress ring. Trans Mater Process 11(4):363–370Google Scholar