한국소성가공학회:학술대회논문집 (Proceedings of the Korean Society for Technology of Plasticity Conference)
- 한국소성가공학회 2003년도 The 8th Asian Symposium on Precision Forging ASPF
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- Pages.193-197
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- 2003
FORMABILITY OF COMBINED STRETCHING PROCESSES WITH SIMULTANEOUS COMPRESSION
- Muranaka T. (Department of Mechanical Engineering, Fukui National College of Technology) ;
- Goto Y. (Department of Mechanical Engineering, Fukui University)
- 발행 : 2003.10.01
초록
In order to restrain the local necking during stretching of sheet metals, the combined stretching processes with simultaneous compression are proposed. The combined stretching tests with two types of compression to top of the cup were carried out using the pure aluminum sheets; (1) stroke control loading process and (2) pinpoint loading process. It was clarified that the metal flow in the cross-section of the cup is affected significantly both by the magnitude of load and the stroke in the compression process. It was also found that the local necking can be restrained effectively by the metal flow from center of the cup and therefore the forming limit is improved.