Abstract
Plastic deformation energy is transformed into heat in about 90 percent. If heat generation with plastic deformation is available for plastic deformation, deformation resistance can be reduced. We propose a new cold stamping technology characterized by using a die which has low thermal conductivity to apply heat generation with plastic deformation to uniform temperature rising of processed material. Our aim in this study is to achieve ecological and technical advantages such as energy saving, high formability and high dimensional accuracy. In this report, the effect of die materials and deformation rate on deformation load was examined by compression tests on SUS304, TW340 and A5052. The following results were obtained: 1) Deformation load on SUS304 and TW340 using ZrO_2 for the die is lower than using SKD11 for the die to make efficient use of heat generation with plastic deformation. 2) Deformation rate has optimum value related to thermometric conductivity of processed material.
