The best way to improve the durability of stamping die

The working failure of the stamping die is closely related to the resistance to congestion.The durability of the stamping die.After working for a period of time, the working size is lost due to frequent wear and tear, and the technical conditions of the parts can no longer be met. According to the total number of parts punched by the die. A pair of stamping dies from design, machining, assembly, adjustment to installation and use, the process is many, the cycle is long, and the processing cost is high.Therefore, in addition to requiring high production efficiency for the die, the punched parts fully meet the quality requirements and technical conditions, The durability of the stamping die itself is also very important.
The working failure of the stamping die is closely related to the resistance to congestion.The durability of the stamping die.After working for a period of time, the working size is lost due to frequent wear and tear, and the technical conditions of the parts can no longer be met. According to the total number of parts punched by the die. A pair of stamping dies from design, machining, assembly, adjustment to installation and use, the process is many, the cycle is long, and the processing cost is high.Therefore, in addition to requiring high production efficiency for the die, the punched parts fully meet the quality requirements and technical conditions, The durability of the stamping die itself is also very important.

1. Improve the design of the die
Whether the die design is reasonable is the basis for improving the durability of the die. Therefore, when designing the die, effective measures should be taken to improve the durability of the die in order to improve the durability of the die. For example, the life of the small hole design die is often expressed in the punch die. For this type of die, the small punch should be designed to shorten its length as much as possible to increase strength. At the same time, the guide sleeve method should also be used to strengthen the small punch for protection. In addition, in the design of the die, the form of the die frame, the fixing method and the guide form of the convex and concave die, the determination of the pressure center and the rigidity of the upper and lower templates should be fully considered. Especially for the punching die, choosing the gap value has a great influence on the durability. In the design, the gap of the die should be selected reasonably, and the gap value should not be too small, otherwise it will affect the service life and durability of the die. Practice has proved that, without affecting the quality of stamping parts, properly enlarge the gap can greatly improve the durability of the die, and sometimes even increase several times and dozens of times.

2. Choose the right die material
Different die materials have different strength, toughness and wear resistance. The use of advanced materials under certain conditions can increase the durability several times. For example, the magnetic pole punching die of the watt-hour meter made of T10A steel has a much lower blade sharpening life than the similar punching die made of Cr12 and Cr12MoV. The average life of each sharpening using G35 titanium carbide steel cemented carbide is 5-10 times higher than that of Cr12 steel die, and the use of tungsten and cobalt cemented carbide as the material of similar convex and concave die is also improved than Cr12 steel. 20-30 times. Therefore, to improve the durability of the die must choose good materials.

3. Forging and heat treatment of die parts reasonably
While selecting high-quality die materials, reasonable forging and heat treatment of materials of the same material and different properties are one of the main ways to improve the durability of the die. For example, during quenching, if overheated during heating, it will not only make the workpiece brittle, but also cause deformation and cracking during cooling, which reduces the durability. Therefore, when manufacturing the die, it is necessary to master the heat treatment process reasonably.

4. Reasonable arrangement of punching die manufacturing process and guarantee processing accuracy
The machining accuracy of the die has a great influence on the durability of the die. For example, due to the uneven assembly gap in the punching die, the die will often be damaged by the shear force and affect the die life. At the same time, the surface finish of the die is too low, which will reduce the durability of the die. Therefore, it is necessary to pay full attention to the size of the hole pitch, the perpendicularity of the punch to the support surface of the fixed plate during assembly, the uniformity of the die spacing, and the guide accuracy level of the guide sleeve and guide post. The higher the manufacturing and assembly accuracy and the higher the surface roughness level of the working part, the higher the durability of the die.