科研之友
微信
新浪微博
Facebook
分享链接
摘要
The deformation behaviour of a sharing sheet and the flying behaviour of a cut scrap in trimming of ultra-high strength steel sheets were observed to reduce the flying speed of the scrap and noise level. As the sheet strength increased, the peak trimming load became large, and thus the flying speed of the scrap increased. Although the flying speed of the scrap for the mild steel sheet was close to the free-fall speed, the speed for the 1180 MPa sheet was accelerated to about two times of the mild steel sheet. The maximum sound pressure level in trimming increased with increasing sheet strength and punch speed. To reduce the flying speed of the scrap in trimming of the ultra-high strength steel sheets, the whole, local and double bevel punches were applied. For the whole bevel punch, not only the trimming load but also the flying speed decreased because of gradual release of energy. For the double bevel punch, however, the sudden release of energy at the end of shearing brought about a high flying speed. It was found that the whole bevel punch was effective in reducing the flying speed of the scrap and the noise level in trimming of ultra-high strength steel sheets.
- 出版日期2017-12
