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Tagalog **Common faults and causes of punching and shearing machine molds**
During the use of punching and shearing machine molds, various failures may occur due to the influence of various factors. The following is an analysis of common faults of punching and shearing machine molds and their causes:
**1. Poor centering of convex and concave molds**
Cause of failure: This is usually caused by improper installation or inaccurate adjustment of the mold. When the centering of the punch and the die is not good, uneven distribution of punching force will result, which will affect the dimensional accuracy and surface quality of the punched parts.
**2. The punch temperature is too high**
Cause of failure: This may be caused by excessive punching speed, poor lubrication, too small die clearance or excessive material shear strength. Excessively high punch temperature may cause thermal expansion of the mold, thereby affecting the blanking accuracy and mold life.
**3. Improper mold sharpening method**
Cause of failure: Improper sharpening method may cause the mold edge to be dull or even chamfered or rounded, thus affecting the blanking effect and mold life. The correct sharpening method should select the appropriate grinding wheel and grinding parameters according to the material and shape of the mold.
**4. Unilateral punching causes wear**
Cause of failure: This is usually caused by uneven mold installation or uneven gap adjustment. Unilateral punching will cause excessive force on one side of the mold and accelerate wear, thereby affecting the punching quality and mold life.
**5. Mold belt problem**
Cause of failure: Strip material problems may be caused by excessive punching clearance, wear of the punch edge, unclean material surface or poor lubrication. The stripping will cause the quality of the punched parts to decrease, and in severe cases, it may even damage the mold.
**6. Increased size or asymmetry**
Cause of failure: This may be caused by excessive mold clearance, uneven material hardness, improper feeding, or tilted mold installation. Increased size or asymmetry will seriously affect the quality and performance of stamped parts.
**7. Unsatisfactory surface quality**
Cause of failure: Unsatisfactory surface quality may be caused by unsharp mold edges, poor lubrication, poor material surface quality, or too fast blanking speed. These factors may cause defects such as burrs, strains or indentations on the surface of stamped parts.
**8. Issues with the size of the punched edges**
Cause of failure: Unqualified lap size may be caused by unreasonable mold design, large changes in material thickness or unstable feeding. Unqualified lap dimensions will affect the connection strength and overall stability of the punched parts.
In summary, punching and shearing machine molds have various faults and causes. It is necessary to strengthen monitoring and maintenance during the production process, and promptly discover and solve problems to ensure the normal operation of punching and shearing machine molds and the stable quality of punched parts.
