123 金属管のダイレス引抜き限界に及ぼす引抜き速度及び加熱幅の影響(塑性加工とその周辺技術) [in Japanese] 123 Effect of drawing speed and heating band on deformation limit in dieless tube-drawing [in Japanese]
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Dieless drawing is a flexible metal drawing technique accompanied by continuous necking using local heating and tensile load without any dies. It is difficult for this technique to realize high speed drawing, because the local heating cannot be achieved and the strain rate increases in high speed drawing. In previous study, the dieless drawing with non-local heating is carried out by means of effective control of drawing path. In this study, the effect of drawing speed and heating band on drawing limit is investigated from viewpoint of strain rate during deformation for dieless drawing with high speed. As a result, it is found that dieless drawing limit decreases with increasing strain rate on high drawing speed. Improvement of drawing limit is achieved by the decrease in strain rate due to increasing heating band.
- The Proceedings of the Materials and processing conference
The Proceedings of the Materials and processing conference 2009.17(0), _123-1_-_123-2_, 2009
The Japan Society of Mechanical Engineers