The punching accuracy of the iron damper cover stainless steel stamping parts plays a key role in its overall performance and subsequent assembly, while die wear greatly affects the punching accuracy. In-depth exploration of the relationship between the two is of great significance for optimizing the production process.
First, die wear has a direct impact on the dimensional accuracy of the punching. During the stamping process, the die and the stainless steel sheet are constantly rubbed, and the die edge will gradually wear as the number of stamping increases. When the edge is worn, the diameter of the punching will gradually increase, causing the dimensional deviation to exceed the allowable range. For example, if the die edge is worn by 0.1 mm, the punching hole originally designed with a diameter of 5 mm may increase to 5.05 mm or even more. For some iron damper covers with high requirements for aperture accuracy, it will seriously affect its matching accuracy with other parts, and may cause problems such as loose assembly or poor sealing.
Secondly, die wear will also affect the shape accuracy of the punching. Unevenly worn die edges may cause defects such as burrs and deformation on the edge of the punching hole, and no longer present a regular circle or other design shape. This is because the degree of wear of the die at different positions is different, resulting in uneven distribution of the blanking force on the sheet. For example, if the edge of a certain local area is severely worn, the shearing effect of the area on the sheet will be weakened, causing the edge of the punching hole to bulge or dent at that position, destroying the shape accuracy of the punching hole, and thus affecting the appearance quality and uniformity of the mechanical properties of the iron damper cover.
Furthermore, in order to control the punching accuracy, the die wear must be effectively monitored and compensated. The method of regularly measuring the die edge size can be used to establish a die wear database, and the stamping process parameters can be adjusted in time according to the wear conditions. For example, when it is found that the die edge is worn to a certain extent, the stamping speed and blanking force are appropriately reduced to reduce further wear, and the aperture is fine-tuned and corrected through subsequent processing procedures. At the same time, die repair technology can also be used, such as repair welding, grinding, etc. on the worn edge to restore its original size and shape, thereby ensuring the stability of the punching accuracy.
Finally, starting from material selection and surface treatment, the relationship between die wear and punching accuracy can also be improved. Choosing mold materials with better wear resistance, such as cemented carbide, can significantly increase the service life of the mold and reduce the decrease in punching accuracy caused by wear. In addition, coating the mold surface, such as TiN coating, can reduce the friction coefficient between the mold and the sheet, enhance the mold's wear resistance, and thus provide more reliable protection for the punching accuracy control of Iron damper cover stainless steel stamping parts, and improve the overall product quality and production efficiency.
