Which principles should be followed in the design of continuous molds

1. The number of steps should be determined reasonably: the number of steps in the continuous die is equal to the sum of the decomposed single steps, such as the number of steps in the punching-blanking continuous die, which is usually equal to the two single steps of punching and blanking. with. However, in order to increase the strength of the die and facilitate the installation of the punch, it can sometimes be completed in several steps according to the number of inner holes. The principle of determining the number of steps is mainly under the principle of not affecting the strength of the die. The less the number of steps, the better, the fewer the number of steps, the smaller the cumulative error, and the dimensional accuracy of the punched workpiece Higher. 2. When arranging the sequence of punching and blanking processes, the punching process should be placed first, so that not only the direct feeding of the tape can be ensured, but also the punched holes can be used as guide positioning holes to improve The accuracy of the workpiece. However, when it is 　　 related to the size after bending or the position of a certain protruding part, the punching position must be determined according to the actual situation.　　3. In order to improve the accuracy of the feeding step in the workpiece without circular holes, a process hole can be designed in the first step of the die, so that the process hole can be used as a guide and positioning to improve the accuracy of the punching. But as the current mold design, we have gradually or completely adopted the outer frame guide belt for the stamping of some precision parts. This helps to ensure the machining accuracy of complex workpieces.　　4. Different holes with higher accuracy requirements of the same size standard should be formed in the same step without affecting the strength of the die. 5. Steps with higher dimensional accuracy requirements should be arranged in the last step as far as possible, while steps with less precision requirements should be arranged in the previous step. This is because the higher the step, the accumulation The greater the error. 6. In a continuous mold with multi-task steps, the sequence of steps such as punching, notching, grooving, bending, forming, and cutting should generally be arranged in front of the separation process such as punching, notching, and grooving, and then The bending and deep drawing forming process can be arranged, and finally the cutting and blanking process can be arranged.　　7. When punching holes of different shapes and sizes, try not to put the large holes and small holes in the same step at the same time, so that the accuracy of the hole distance can be ensured when the mold is repaired.　　 8. In the design, if the forming and punching are completed on the same die, the forming punch and the punching punch should be fixed separately, and the surfaces should not be fixed on the same fixed plate. Try to fix the forming punch on the stripper. A back panel is added at the back.　　 9. When designing, make sure that the formed parts of each process step are not damaged, so that the strip material is kept on the same feeding line.　　10. For molds with a large number of process steps and many bending steps, the cutting edge of the concave die should adopt a block-in structure as much as possible, which can realize rapid replacement and grinding.