According to statistics, China's annual mold consumption in the mechanical processing industry alone is as high as five times the total price of machine tools. It can be seen that the large consumption of molds not only directly increases production costs, but also causes frequent production shutdowns due to frequent mold replacements, resulting in greater economic losses. The mold repair technology undoubtedly strengthens the life of the wire drawing mold, and has good economic benefits. It can apply various iron-based alloys and other metal material molds and workpieces to strengthen and repair the surface and greatly increase the service life.

Here we need to pay attention: although the machine will give an alarm when the operation is wrong, it may occasionally burn out pits on the mold surface! Therefore, it is necessary to clarify the specific steps of wire drawing die repair:

1. Clean-up: Simple clean-up is required at the repaired place to remove oil and impurities, otherwise there will be poor power supply and spark splash during the repair process.

2. Rolling rate: the torch rotation speed is suitable for the pulse output current to form tightly arranged welding points on the supplementary material. The rotation speed should not be too fast, otherwise there will be a small amount of supplementary material peeling and small pores after repair and polishing.

3. The contact point between the welding torch and the mold: the smaller the contact area between the welding torch and the supplementary material, the better the pressure bonding, the greater the current density that passes instantly (the more concentrated the current), the greater the heat of the welding point, and the greater the degree of combination of supplementary materials it is good. The power data shown in the shell of the supplementary material is the power requirement when the electrode rod of the φ5mm standard welding torch is in contact with the planar supplementary material. The larger the contact area of the welding head with the same power, the greater the current dispersion and the unsatisfactory after-filling effect. In the process, it is easy to cause melting and splashing of the supplementary material and uneven surface.