Traditional cold heading performance defects of fasteners

For the production of fasteners, cold heading is a very important link, and the current traditional cold heading performance has some shortcomings, which will cause the fasteners to not perform their best, thus affecting the performance of the fasteners. , What are the shortcomings of the traditional cold heading performance of fasteners?

First, in the same tensile test, we can find that the deformation rate of the actual cold forging process is higher than that of the cold forging test, and it is much higher. (Guide: Fastener knowledge: bad screw head shape)

Second, in the process of testing, we only check with our eyes whether there are cracks in the fasteners of the style. Sometimes the cracks may be too small, which leads to the above error and lack of scientificity.

Third, during the cold upsetting test, there are some deviations between the various data and our actual cold upsetting, which cannot represent the actual cold upsetting, and there may be deviations.

Fourth, there is no way to replace some of the actual data we want in the data obtained during the cold upsetting test. As a result, we have a serious deviation in the cold heading performance of the material.

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