模具的精度主要决定于两个因素。一是工件(冲件、塑件、压铸件等)精度,二是模具结构对凸模与凹模相互配合提出的要求。 凸模或凹模、型芯或型腔的精度,要根据工件精度考虑。但是工件的精度并不全决定于模具。对于冲件来说,有回弹数值的变化。回弹值与冲件材质、辗纹方向、模具间隙、模具工作部分磨损程度等因素有关。一般说来,要把回弹数值的变化范围,控制 The accuracy of the mold is mainly determined by two factors. First, the workpiece (pieces, plastic parts, die-casting, etc.) accuracy, and second, the mold structure of the punch and die with each other requirements put forward. Punch or die, core or cavity accuracy, according to the accuracy of the workpiece to consider. However, the accuracy of the workpiece is not entirely determined by the mold. For the punch, there is a change in the value of the rebound. Rebound value and the punch material, the direction of rolling, mold gap, mold work part of the degree of wear and tear and other factors. In general, take the rebound range of values ​​and control