In order to ensure the quality of the wire, the drawing die must be inspected and polished before use. With the use of the mold, the hole size of the mold changes, and the working area and the sizing area need to be repaired.
The level of mold repair affects the reuse rate and life of the mold
The steps to repair the mold are as follows:
1. Cleaning: First of all, it is necessary to do a simple cleaning at the repaired place to remove oil and impurities, otherwise there will be poor power supply and flying sword sparks during the repairing process.
2. Rolling speed: the speed of rotation should not be too fast, otherwise there will be a small amount of supplementary material peeling off and small pores after repairing 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 of the wire drawing die, the better the pressure will be, so that the bonding degree of the supplementary material will be relatively good.
4. Posture and pressure: When repairing, the angle between the welding torch and the mold surface is preferably 45 degrees, and a certain pressure is applied to the welding torch. The pressure depends on the roughness of the defect surface. If it is not smooth, the surface with more impurities should use more force.
5. Complex cavities: use precision power when repairing fine, multi-angular, and complex surfaces. It is better to repair thin materials multiple times. The normal state is suitable for defects with relatively large repairs.
6. Oxidation surface repair:
