Die cracking during metal stamping processing is a very common situation, but when it is more serious, a template is suddenly divided into several pieces. Perhaps, there are many situations that cause the template to crack immediately. From the purchase of raw materials for stamping dies to the stamping operation process, it can cause harm to it. The causes of die cracks during metal stamping processing are




Analysis of the cause of die burst during metal stamping processing


Details


Die cracking during metal stamping processing is a very common situation, but when it is more serious, a template is suddenly divided into several pieces. Perhaps, there are many situations that cause the template to crack immediately. From the selection of raw materials for stamping dies to the stamping operation process, it can cause harm to them. The reasons for die cracking during metal stamping processing are:




1. Unsatisfactory blanking




There is no demagnetization solution before manufacturing, no return tip; there are broken needles, bullets, yellow and other jams in the manufacturing; there is no leakage of feces, or rolling blocking feces, stepping feces, this is the most common, assembling If the master does not pay attention, such as when there are many blanking holes, or when the mold has a protective layer, this situation is most likely to occur.




2. Design plan processing technology




The compressive strength of the mold is insufficient, the wound interval is too close, the mold design is unscientific, and the number of template blocks is insufficient without cushions.




3. Quenching and tempering treatment: poor heat treatment and quenching process will cause deformation




Practical experience shows that the heat treatment quality of the mold is very harmful to the characteristics and service life of the mold. From the analysis and statistical analysis of mold invalidity, it is known that the 'safety accidents' of mold invalidity caused by thermal negligence account for about 40%.




4. The thread cut is negligent




The ground hanging wire was cut, and the gap of the wire cut was solved incorrectly, and the mold layer was not harmed by the corner cleaning and the wire cutting. The tooth surface of the stamping die is mostly processed by wire cutting. Because of the thermoelectric effect of wire cutting and the effect of electrolysis, the mold manufacturing surface creates a thin and thick mildew layer, which reduces the strength of the surface layer and causes microscopic cracks, etc., which leads to the initial damage of the stamping die of the wire cutting process, which immediately harms the cold of the mold. The maintenance of the punching gap and the tooth surface are very easy to chip, which reduces the mold life. Therefore, in the on-line cutting process, effective electrical standards should be selected to try to avoid the deep layer of mildew.




5. The adoption of high-speed punching machines and equipment




The tonnage of the high-speed punching machine, the cold punching pressure is insufficient, and the die adjustment is probably too deep. The precision and rigidity of stamping machine tools (such as stamping machines) are extremely important to the damage to the service life of stamping dies. The stamping machine has high precision and good rigidity, and the service life of stamping dies is greatly improved. For example, the raw material of the stamping die for the complicated ferrite core is Crl2MoV, which is applied on the general open-type stamping machine, and the average regrind service life is 1-3 million times; while the application on the new high-precision stamping machine, the regrind service life of the stamping die reaches 6-12 million times.