(1) the designed stamping parts must meet the product use and technical performance, and be easy to assemble and repair.

(2) the designed stamping parts must be conducive to improving the utilization rate of metal materials, reducing the varieties and specifications of materials, and reducing the consumption of materials as much as possible. If allowed, low-cost materials shall be used to make the parts free of scrap and less scrap blanking.

(3) the designed stamping parts must be simple in shape and reasonable in structure, so as to simplify the die structure and the number of processes. That is to say, the minimum and simplest stamping processes are used to complete the processing of the whole part, and other methods are reduced. It is also conducive to the stamping operation, the mechanization and automatic production of the organization and the improvement of labor productivity.

(4) when the designed stamping parts can be used normally, the requirements of dimensional accuracy grade and surface roughness grade shall be lower as far as possible, which is conducive to the exchange of products, reducing waste products and ensuring the stability of product quality.

(5) the designed stamping parts shall be able to use the existing equipment, process equipment and process flow as much as possible to process them, and be conducive to the extension of the service life of the stamping die.