銅合金の異形線せん断加工特性について（第1報）

抄録

Metal zipper is constructed from very small parts so-called zipper teeth. They are made of copper alloy and are formed through three plasticity processes i.e., shearing, forging and bending. These processes are connected continuously and are operated under high throughput. In the shearing process, a preformed wire of copper alloy is sheared to small tooth parts. In order to obtain a designed tooth shape, we have to repeat actual trial tests until we can get desirable one. That is one of important issues in our new-zipper development. To overcome this, prediction of shape based on principle is necessary. The purpose of this research is to know basic information about shearing of preformed wire. Through comparison of preformed wire shearing and simple round wire shearing, an effect of shearing speed on a sheared shape was studied.