In fact, this is a very common situation when the metal stamping die bursts, but if the burst is relatively serious, it will burst into several pieces. There are many reasons that lead to the bursting of the metal stamping template. From the purchase of raw materials for the metal stamping die to the metal stamping operation process, it may be the reason for the bursting of the metal stamping die.
1. Unsatisfactory blanking
There is no demagnetization solution before production and manufacturing, and there is no ejection tip; There are stuck materials such as broken needle, broken spring and yellow in production; It is most common that there is no leakage of feces, or rolling block of feces, or foot block of feces when assembling the mold. If the teacher who assembles the mold does not pay attention, such as when there are many blanking holes, or when the metal stamping mold has a protective layer cushion block, this situation is most likely to occur.
2. Design scheme Processing technology
The compressive strength of the metal stamping dieis insufficient, the wound spacing is too close, the design of the metal stamping die is unscientific, and the number of templates is insufficient without cushion blocks.
3. Quenching and tempering treatment: deformation caused by poor heat treatment and quenching process
Practical experience shows that the heat treatment quality of metal stamping dies does great harm to the characteristics and service life of metal stamping dies. According to the analysis and statistical analysis of the reasons for the invalidity of metal stamping dies, the “safety accident” caused by thermal negligence accounts for about 40%.
4. Line cutting negligence
The ground wire cutting and wire cutting gap are wrongly solved, and the corner cleaning and mildew layer damage caused by wire cutting are not done. The metal stamping die tooth surface is mostly processed by wire cutting. Because of the thermoelectric effect and electrolysis effect of wire cutting, the surface layer of the metal stamping die manufacturing must be thin and thick, resulting in the reduction of surface strength, the appearance of microscope cracks, etc., leading to early damage of the metal stamping die processed by wire cutting, immediately endangering the maintenance of the cold stamping gap of the metal stamping die and the tooth surface is very easy to crack, reducing the service life of the metal stamping die. Therefore, in the process of online cutting, effective electrical gauge should be selected to avoid the deep layer of mildew.
5. Adoption of high-speed punch machine equipment
Tonnage of high-speed punch, insufficient cold punching pressure, and mold adjustment may be too deep. The precision and stiffness of stamping machine tools (such as stamping presses) are extremely important to the life of metal stamping dies. The stamping machine has high precision and good rigidity, and the service life of the metal stamping die has been greatly improved. For example, the raw material of the stamping die for the complicated ferrite core hardware is Crl2MoV, which is applied on the general open type punch, and the average service life of the regrinding is 1-3 million times; The service life of the metal stamping die can reach 6-12.
Post time: Nov-18-2022