What factors determine the stamping accuracy of the punch

In the production of punch press, the punch drives the die to move back and forth. This determines that the processing accuracy of the stamping product is mainly affected by the following three aspects, namely the size and accuracy of the die, the accuracy of the die alignment, and the accuracy of the punch.

1. The influence of the size and accuracy of the mold on the accuracy of the stamping product

Stamping products will have its own elastic recovery, the elastic deformation and deformation of the mold will cause the temperature rise of the product, etc. The deviation between the product and the size of the mold will affect the accuracy of the stamped product.

2. The impact of the accuracy of the mold assembly on the accuracy of the stamping product

In punch press work, the slide block and the master mold are often installed in a module with guide pillars (DIE-SET) to maintain the alignment accuracy. If it is difficult to maintain the accuracy without a strong guide pillar, the mold will be improperly aligned and cause the product to be inward. , Center misalignment, bending, etc.

3. The impact of the accuracy of the punch itself on the accuracy of the stamping product

The punch’s body, work surface, sliding block and other structural parts and forging dies will all produce changes in elastic deformation. The elastic deformation error 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, which determines the forging accuracy of the bottom thickness and flange thickness of the stamped product.

The accuracy of a punch press is usually expressed in terms of its static accuracy and rigidity. The accuracy level under static conditions can be divided into super, level 1, level 2, and level 3 according to the Japanese JIS punch press static accuracy index regulations. For the punch press, the static level is a major factor, but the rigidity of the punch press is also an important factor that cannot be ignored. This is the strength of the punch press.