What are the preventive measures to reduce and eliminate the stars on the surface of metal stamping parts?

1. The BL material (uncoiling blanking material) used in the production of metal stamping parts must be cleaned 1︿2 times, and the surface quality after cleaning must meet the requirements of the inspection standard;

2. The material after uncoiling and blanking should be used for stamping production in time. If it cannot be used for stamping production temporarily, it should be properly handled in the process of transportation and storage to prevent the BL material from being soiled;

3. Metal stamping molds, especially drawing molds, must be cleaned. If there is dust and other dirt falling on the mold surface during stamping production, the line must be stopped and the mold surface should be wiped clean with a sticky cloth;

4. In the case that the surface of the die and the surface of the material of the metal stamping part are clean, if the surface of the part still has serious stars after drawing, this material cannot be used for the production of large outer covering parts, and the material supplier needs to be notified to solve it;

5. The metal stamping die must be chrome-plated again after a period of use;

6. Find a way to close the stamping workshop and production line for the production of large metal stamping parts to prevent dust and other contaminants from floating into the stamping line;

7. If the large-scale metal stamping parts are produced on the artificial production line, the operator must wear special anti-cut gloves when handling the loading and unloading materials; The cutting powder enters the mold without pressing the cutting powder, and the cutting edge of the upper die is made into an acute angle, so that the cutting edge of the upper die is sharp. A blower pipe is designed and installed in the middle, and the cutting powder is blown out of the mold with compressed air.