Improve the durability of the die and extend the life of the die

Stamping dies are necessary process equipment in the stamping production process, which play a decisive role in improving product quality and improving production efficiency. The durability of the stamping die is determined by the total number of parts punched by the punch when the punch and the die lose their working size due to frequent wear after a period of work, and can no longer meet the technical conditions of the parts. From design, machining, assembly, adjustment to installation and use of a stamping die, there are many processes, long cycles, and high processing costs. Therefore, for the punching die, in addition to high production efficiency, and the punched parts fully meet the quality requirements and technical conditions, The durability of the stamping die itself is also very important. Therefore, to extend the service life of stamping dies, stamping parts processing plants must improve the durability of stamping dies. The following points should be paid attention to in normal stamping operations: 1. Improve the design of precision stamping dies. Whether the design of stamping dies is reasonable is to improve the durability of stamping dies The basis of degree. Therefore, when designing the stamping die, effective measures should be taken to improve the durability of the stamping die. For example, the life of the small hole punching die is often reflected in the punching die for punching small holes. For this type of stamping die, the length of the small punch should be shortened as much as possible in the design to increase the strength. At the same time, the method of guiding sleeves should be used to strengthen the small punch for protection. In addition, in the design of the stamping die, factors such as the form of the die base, the fixing method and guiding 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 blanking die, the selection of the gap value has a great influence on the durability. When designing, the gap of the stamping 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 stamping die. Practice has proved that, without affecting the quality of the stamping parts, properly enlarging the gap can greatly improve the durability of the stamping die, sometimes even several times or tens of times. 2. Correct choice of die materials. Different die materials have different strength, toughness and wear resistance. Under certain conditions, the use of advanced materials can increase durability several times. For example, the watt-hour meter magnetic pole punching die made of T10A steel has a much lower one-time sharpening life than the similar die made of Cr12 and Cr12 MoV. The average sharpening life of G35 titanium carbide steel cemented carbide is 5-10 times longer than that of Cr12 steel die, and tungsten-cobalt cemented carbide is used as the same type of convex and concave die material, which is better than Cr12 steel. 20-30 times. Therefore, in order to improve the durability of the die, a good material must be selected. 3. Reasonable forging and heat treatment of die parts. While selecting high-quality die materials, reasonable forging and heat treatment are required for materials of the same material and different properties, which is one of the main ways to improve the durability of the die. For example, during quenching, if the production is overheated during heating, it will not only make the work piece too brittle, but also easily cause deformation and cracking during cooling, which will reduce the durability. Therefore, when manufacturing the die, the heat treatment process must be reasonably mastered. 4. Reasonably arrange the manufacturing process of the die and ensure the machining 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 broken under the action of shearing force and affect the life of the die. At the same time, the surface finish of the die is too low, which will also reduce the durability of the die. Therefore, during processing, full attention must be paid to the size of the hole spacing, the perpendicularity of the punch to the fixed plate supporting surface during assembly, the uniform spacing of the punches, and the guiding accuracy grade of the guide sleeve and the guide post. The higher the manufacturing and assembly accuracy and the higher the surface roughness of the working part, the higher the durability of the die. 5. Correct selection of the press In order to improve the durability of the stamping die, a press with higher precision and higher rigidity should be selected, and the stamping tonnage should be greater than 30% of the punching force. Normally, the use of servo punching machine can correspondingly increase the life of the mold by more than several tens of times. 6. Reasonable use and maintenance of precision stamping dies. In order to improve the durability of stamping dies, operators must use and maintain stamping dies reasonably. Stamping dies should be repaired frequently to prevent stamping dies from working with defects. The above are several common methods to improve the wear resistance of stamping dies. The significance of improving the wear resistance can not only increase the service life of the stamping die, reduce the production cost of the die enterprise, but also ensure the quality of the products produced and improve the production efficiency. Recommended article: There are coups to extend the service life of drawing stamping parts. Previous: Development focus and prospects of stamping dies