1.正态分布与冲件误差冲压加工通常是大批量生产,即使是使用同一台加工设备,用同样冲压力进行加工,但冲件各尺寸的实际数值不是一个固定的数值,将分布在某一范围之内。如果冲件的实际尺寸在公差范围内,则没有问题。超出公差范围即为废品。若冲件的精度很高,则模具的加工技术也要相应提高,还需要考虑影响误差的各种因素。利用正态分布可 1. Normal distribution and stamping error stamping is usually mass-produced, even with the same processing equipment, with the same stamping force for processing, but the actual value of each size stamping is not a fixed value, will be distributed in a Within a range. There is no problem if the actual size of the punch is within tolerance. Out of tolerance is scrap. If the punch of high precision, then the mold processing technology should be increased accordingly, but also need to consider the various factors that affect the error. Use normal distribution