In the stamping production process of the punch press, the punch press drives the die to move back and forth, which determines that the machining accuracy of the stamped finished product is mainly affected by the following three aspects, namely, the size and accuracy of the die, the accuracy of the die assembly and the accuracy of the punch press.

1, the size of the mold

The structural parts such as the punch and forging die body, workbench and slider will change elastic deformation. The error of elastic deformation between the punch and the die is the accuracy of the bottom dead center position of the punch slider, which can also be called the dynamic accuracy of the punch under load, and determines the forging accuracy of the bottom thickness and flange thickness of the stamping product. 3, the accuracy of the mold.

When working in a punch press, the slider and the main die are usually put into a die set with guide posts to maintain the alignment accuracy. If a firm guide post is not used, it will be difficult to maintain the accuracy, which will lead to incorrect alignment of the mold and off-center, misalignment and bending of the product.