The accuracy of the mold includes dimensional accuracy, shape accuracy, positional accuracy, and surface roughness. The accuracy of the mold is mainly reflected in the precision and matching precision of the mold parts. The precision of the working part of the mold is higher than the precision of the product part. For example, the precision of the punching edge size is higher than the precision of the product part. The numerical value and uniformity of the punching punch and the die blanking gap are also the main precision. One of the parameters.
   The accuracy measured at ordinary times is the accuracy in the non-working state (such as the punching gap), that is, the static precision. In the working state, due to the influence of working conditions, the static precision and the change become dynamic precision, and the dynamic precision is the data with real meaning.

The accuracy of the general mold should be coordinated with the precision of the product. At the same time, it is also restricted by the technical means of mold processing. With the development of manufacturing technology and the improvement of the technical means of mold processing, the precision of the mold will be correspondingly improved. Reversible production will also become a reality.

It is important for high-speed stamping dies, large-scale stamping dies, precision plastic dies, and large plastic dies, which require high precision and good stiffness.

The working load of such a mold is large. When there is a large elastic deformation, it not only affects the dynamic precision of the mold, but also relates to whether the mold can work normally. Therefore, in the mold design, while meeting the strength requirements, The rigidity of the mold is ensured, and additional deformation due to improper processing is also avoided in the manufacturing.