1. The mold core positioning hole is worn out due to frequent and multiple combinations of the mold core, resulting in large gaps after assembly (looseness after assembly) or uneven gaps (positioning deviations), which will cause the shape of the section after punching to change Poor, the punch is easy to break, burrs, etc., can be adjusted by checking the condition of the section after punching.
2. When the gap is small, the cross-section is less. When the gap is large, the cross-section is more and the burrs are larger. A reasonable gap can be obtained by shifting. After adjustment, appropriate records should be made, and marks can also be made on the side of the die for subsequent maintenance operations.
3. In daily production, attention should be paid to the collection and preservation of the original mold in the best condition. If the subsequent production is not smooth or the mold changes, it can be used as a reference for mold maintenance.
4. In addition, the auxiliary system, such as whether the ejector pin is worn, whether it can eject the material, whether the guide pin and the bushing are worn, should be checked and maintained.