It is a very common situation that the stamping template of the metal mold bursts, but when it is serious, a template is divided into several pieces at once. Of course, there are many reasons for the direct cracking of the template, from the design of the mold to the purchase of materials to the stamping operation process, which can affect it. The following editors sort out the reasons for the bursting of the following hardware molds.
1. Design process
The strength of the mold is not enough, the distance between the knife edges is too close, the mold structure is unreasonable, the number of template blocks is not enough, and there is no backing plate foot.
2, the blanking is not smooth
Before production, there is no demagnetization treatment and no return tip; there are broken needles and springs in production; there is no leakage of excrement, or rolling and blocking of excrement, and the foot is blocked. This is common. If the assembly master does not pay attention, like This is easy to happen when there are many blanking holes, or when the mold has spacers.
3. Heat treatment: deformation caused by improper quenching and tempering process
Practice has proved that the thermal processing quality of the mold has a great influence on the performance and service life of the mold. From the analysis and statistics of the causes of mold failure, it can be seen that "accidents" of mold failure caused by improper heat treatment account for more than 40%.
4. Improper handling of wire cutting
The ground pull wire is cut, the wire cut gap is not handled properly, and the metamorphic layer of the angle cleaning and wire cut is not affected. The cutting edge of the die is mostly processed by wire cutting. Due to the thermal effect and electrolysis of the wire cutting process, a metamorphic layer of a certain thickness is formed on the surface of the mold, resulting in a decrease in surface hardness and microcracks, etc., which makes the wire cutting die prone to early wear, which directly affects the die blanking gap. The holding and the cutting edge are easy to chip and shorten the service life of the mold. Therefore, in the wire cutting process, a reasonable electrical standard should be selected to minimize the depth of the metamorphic layer.
5. Selection of punch equipment
Punch tonnage, insufficient punching force, and too deep die adjustment. The accuracy and rigidity of stamping equipment (such as presses) are extremely important to the life of the die. The stamping equipment has high precision and good rigidity, and the life of the die is greatly improved. For example, the die material of complex silicon steel sheet is Crl2MoV. When used on an ordinary open press, the average regrinding life is 10,000 to 30,000 times; when used on a new precision press, the die regrind life can reach 60,000-120,000 times.
I don’t know if you have learned from the analysis of the reasons for the stamping and bursting of metal molds shared above. In addition, the production awareness of metal stamping operators is also very important.
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