How to choose the hardness of the plum blossom punch?

    Regarding the hardness of the punch, most people don't know how to choose. If the hardness is high, it is easy to break, if the hardness is low, the mold cannot work normally. So how to choose the right hardness to use?

    The hardness of the punch is mainly affected by its own wear resistance. The higher the hardness, the smaller the wear and the better the wear resistance. However, the die of the mold usually bears a large impact load, and too high hardness can easily cause brittle fracture. In order to prevent the mold parts from suddenly becoming brittle during the working process, the mold parts should have high strength and toughness. Repeated high-intensity friction will bring high heat.

    When the working temperature of the punch is higher, the hardness and strength will decrease. This situation will lead to premature wear or plastic deformation and failure of the punch. Then, the hardness needs to choose the right material according to the use situation, and it is especially important to process it to the right hardness. Therefore, the material of the punching needle should have a higher tempering strength to ensure that the punching needle has a higher hardness and strength at the working temperature.

    Various materials can reach the required hardness, but not all hardness is the use hardness, high hardness may cause instantaneous fracture, and even affect the use of the mold; but the hardness is too low to be machined. Therefore, proper punch hardness is very important.