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How to prolong the service life of stamping die?

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For stamping parts, it is more common in the industrial industry, and various types of stamping parts are widely used in various industries. The blanking die is also an indispensable process equipment in the stamping production process, because it plays a decisive role in improving the quality of the product and improving the production efficiency. However, the stamping die will also wear out in the process of use, so how should we prolong the service life of the stamping die? This is also the goal pursued by stamping parts processing plants.

The durability of the punching die is determined by the total number of parts produced by the punch and die after a period of work, due to frequent wear loss and working size, and can no longer meet the technical conditions of the parts. Once it is used from design, processing, assembly, adjustment and installation, there are many processes, long cycle and high processing cost. Therefore, for the die, in addition to requiring high production efficiency. The punched parts fully meet the quality requirements and technical conditions, and the durability of the stamping die itself is very important.

Therefore, in order to prolong the service life of the stamping die in the processing workshop, we must improve the durability of the stamping die. The following points should be paid attention to in the daily punching work:

1. Improve the precision die design

Reasonable punching die design is the basis for improving punching die durability. In order to improve the durability of stamping dies, effective measures should be taken to improve the durability of punching dies when designing stamping dies. For example, punch designs for punching often show the life of the punching die. For this type of blanking die, we should make the length of the thin punch as short as possible when designing, which can improve the strength. At the same time, a guide bush should be used to strengthen the protection of the fine punch.

In addition, in the design of the blanking die, the form of the die base, the installation method of the convex and concave die and the guide form should be fully considered, and the pressure center and the rigidity of the upper and lower template should be determined. Especially for the blanking die, the choice of the gap value has an important influence on its durability. In the design of the punching die, the die gap should be selected reasonably, and the value of the intermediate gap should not be too small, otherwise it will affect the life and durability of the die. The results show that under the premise of not affecting the quality of the mold, the durability of the mold can be greatly improved by appropriately widening the gap, and sometimes it can be increased by several times or even dozens of times.

2. Proper selection of die material

Die materials have different strengths, toughness and wear resistance. High-quality materials can be used under certain conditions, which can increase the durability several times. The service life of T10A steel dies is shorter than that of Cr12 and Cr12MoV dies. The average grinding life of G35 titanium carbide cemented carbide as a convex and concave material is 5 to 10 times that of Cr12 steel, while the average grinding life of W-Co tungsten-cobalt carbide as a convex and concave material is 20 to 30 times that of Cr12 steel. Therefore, to improve the durability of the die, good materials must be selected.

3. Reasonable forging and heat treatment of stamping die parts.

The selection of high-quality die materials and the reasonable forging and heat treatment of the same material and materials with different performance requirements are one of the main effective ways to improve the durability of the die. Generally speaking, quenching, if overheating during heating, not only can make the workpiece too brittle, but also easily cause deformation and cracking during cooling, reducing its durability. Therefore, when manufacturing the die, the heat treatment process must be correctly grasped.

4. Reasonably arrange the die production process and ensure the machining accuracy.

The precision of the die has a great influence on the durability of the die. For example, in the blanking die, due to the uneven assembly gap, under the action of shear force, the die is often gnawed, thus affecting the life of the die. At the same time, the poor surface finish of the die can also cause a decrease in the durability of the die. Therefore, when processing, it must be assembled according to the size of the hole spacing, the verticality of the punch and the support surface of the fixed plate should be consistent, and the die spacing should be uniform, and the guide accuracy level of the guide column should be given sufficient attention. The higher the machining and assembly accuracy and the higher the surface roughness level of the working part, the better the durability of the die.

5. Correctly select the press.

In order to improve the durability of the punching die, a punching machine with high precision and high rigidity should be selected, and a punching amount with a punching amount much greater than 30% of the punching pressure should be selected. In general, the use of a servo punch can correspondingly increase the life of the die by dozens of times.

6. Correct use and maintenance of precision die.

In order to increase the life of the stamping die, the operator should use and maintain the stamping die reasonably, and the stamping die should be repaired frequently to avoid the stamping die being pressed.

The above-mentioned content about the life of the stamping die is one of the key points of the development of stamping die technology. It is also one of the key points of the development of stamping die technology to improve the degree of standardization of the die as a whole. In order to prolong the life of the die, various strengthening and superhardening treatments on the surface of the die are also the focus of development. I hope the above can be helpful to readers.

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