Coining Principles
精压压印工艺原理
标签：体积成形, 高单位压力, 封闭模腔, 复制型面
精压与普通冲压区别在于：模具近乎闭合、无（或极小）飞边空间，单位压力常达 500–1500 MPa，使金属三维流动填满微细图文。变形量小但尺寸精度高（IT7–IT8）、表面可呈镜面。适用于延展好的铜、黄铜、银及软钢。
Coining differs from stamping in that the die is nearly closed with little or no flash room, and unit pressure reaches 500–1500 MPa so metal flows in 3D to fill fine detail. Deformation is small but accuracy is high (IT7–IT8) and the face can be mirror-like. It suits ductile copper, brass, silver and mild steel. ---