Continuous die refers to the press in a stamping stroke, the use of ribbon stamping raw materials, in a pair of dies with several different stations to complete multiple stamping processes at the same time of cold stamping die, die stamping is completed once, the material belt distance movement once, to the completion of the product.

Continuous die
​
1. Reasonably determine the number of working steps: the number of working steps of the continuous mold is equal to the sum of a single decomposition process, such as punching - falling the number of working steps of the continuous mold is usually equal to the sum of the two single processes of punching and falling. However, in order to improve the strength of the stamping die and facilitate the installation of the punch, sometimes several steps can be completed according to the number of internal holes. The principle of determining the number of working steps is mainly that without affecting the strength of the die, the less the number of working steps, the better, the fewer the number of working steps, the smaller the cumulative error, and the higher the dimensional accuracy of the workpiece.

2. When the order of punching and blanking process is arranged, the punching process should be put in front of it, which can not only ensure the direct transmission of material, but also use punching as a guide positioning hole to improve the accuracy of the workpiece. However, when the size is associated with some bending dimensions or protruding parts, the punching position should be determined according to the actual situation.

3. In the workpiece without a round hole, in order to improve the accuracy of the feeding step, the process hole can be designed in the first step of the die, so that the process hole is used as a guide to improve the accuracy of the stamping part. However, in the current mold design, we have gradually or completely adopted the outer frame guide. This is conducive to ensuring the machining accuracy of complex workpieces.

4. For different holes with higher precision requirements of the same size, the same step should be arranged without affecting the strength of the die.

5. The steps with higher dimensional accuracy requirements should be arranged in the last process as far as possible, and the steps with lower accuracy requirements are best arranged in the previous process, because the higher the step, the greater the cumulative error.
6. In the multi-step continuous mold, the arrangement sequence of bench punching, notching, grooving, bending, forming, cutting and other steps should generally arrange the separation process of punching, notching, grooving and so on in front, and then arrange the bending, drawing and forming process, and finally arrange the cutting and unloading process.

7. When flushing porous processes of different shapes and sizes, try not to place large holes and small holes in the same step at the same time to ensure the accuracy of hole spacing when repairing the mold.

8. In the design, if the forming and punching are completed on the same die, the forming punch and punching punch should be fixed separately, and the surface should not be fixed on the same fixing plate. Fix the molded punch to the strip as much as possible. The backplane is installed at the rear.

9. In the design, the forming part of each step must be kept on the same feeding line and not damaged.

10. For the mold with many process steps and many bending steps, the cutting edge of the concave die should be as much as possible in the block structure, which can achieve rapid replacement and grinding.

11. For the fixing method of the punch, when realizing continuous stamping, the fixing method of the hanging table and the reverse press block should be used to ensure that the punch will not fall off and damage the mold in the continuous stamping.
12. If the strength and position of the mold structure allow. Multi-step mold should try to use floating guide pin.

13. Cut boundary interface form. In continuous molds, inexperienced people often clear the interface corners. I recommend using a semicircular incision.

14. The round hole of the product as the reference hole should generally be cut simultaneously with the guide hole. If the edge distance of the round hole is small and the hole size is required, the shape should be cut before punching.