Stamping die is a necessary process equipment in stamping production process, which plays a decisive role in improving product quality, prolonging product life and improving production efficiency. However, it is difficult to meet the production requirements because of the loss of working size due to frequent wear and tear in the production process. Therefore, it is very important to improve the service life of stamping die. Let's have a look at the small braid of Shandong mould!
The methods to improve the durability of stamping dies are as follows:
1. Improve the design of stamping die
Whether the design of stamping die is reasonable or not is the basis of improving the durability of stamping die. Therefore, in order to improve the durability of stamping die, effective measures should be taken to deal with the adverse conditions of product forming when designing the stamping die. For example, the life of the small hole stamping die is often reflected in the punch of the small hole. For this kind of stamping die, the length of the small punch should be shortened as much as possible to increase the strength. At the same time, the guide sleeve should be used to strengthen the protection of the small punch. In addition, in the design of stamping die, the form of die base, fixing method and guiding form of punch and die, determination of pressure center and rigidity of upper and lower templates should be fully considered. Especially for the blanking die, the selection of the clearance value has a great impact on the durability. In the design, the gap of 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 stamping die. It has been proved that, without affecting the quality of stamping parts, the durability of stamping dies can be greatly improved by properly enlarging the gap, sometimes even several times or dozens of times.
2. Correct selection of stamping die material
Different stamping die materials have different strength, toughness and wear resistance. Under certain conditions, the durability can be increased several times by using advanced materials. Therefore, in order to improve the durability of stamping die, good materials must be selected.
The material of toolox series is a new kind of pre hardened tool steel with high toughness, high wear resistance and no internal stress. Moreover, it has very high purity, very small grain size, very small content of S, P, and precipitated carbide content, which is very uniform. Due to the special composition design, toolox series materials have very excellent surface treatment performance, The surface hardness of toolox44, toolox40 and toolox33 can reach HRC65, hrc58 and 1.8mm respectively.
The above characteristics of the materials of toolox series make the application of toolox series materials have special advantages in some stamping dies.
1) Thick steel plate (the typical case of punching shear thickness of 35mm steel plate), stainless steel plate, and non-ferrous metal plate stamping mold, the more typical is the air conditioning fin mold.
2) Drawing die, stainless steel drawing die.
3) 冷挤压模具.冷挤压304不锈钢,厚度0.5mm以上, 取代DC53等材料,效果非常好。
3) Cold extrusion die. 304 stainless steel with thickness more than 0.5mm is used to replace DC53 and other materials, and the effect is very good.
4) Large stamping formwork with high dimensional stability requirements.
3. Reasonable forging and heat treatment of stamping die parts
While selecting high-quality stamping die materials, reasonable forging and heat treatment for materials of the same material and different properties are one of the main ways to improve the durability of stamping dies. For example, during quenching, if the production is overheated during heating, it will not only make the workpiece too brittle, but also easily cause deformation and cracking during cooling, thus reducing the durability. Therefore, in the manufacturing of stamping die, we must reasonably grasp the heat treatment process.
Toolox material is quenched quenched and tempered steel which is directly pre hardened by steel plant. With proper surface treatment (such as nitriding), the high toughness of toolox matrix material and the high hardness of upper surface layer can achieve excellent results.
4. Reasonable arrangement of stamping die manufacturing process and ensure machining accuracy
The machining accuracy of stamping die has a great influence on its durability. For example, due to the uneven assembly clearance in the blanking die, the die will often be chewed under the action of shear force, which will affect the life of the stamping die. At the same time, if the surface finish of stamping die is too low, the durability of stamping die will be reduced. Therefore, it is necessary to pay attention to the hole distance, the perpendicularity of the punch to the support surface of the fixed plate, the uniformity of the stamping die spacing, and the guide sleeve and guide pillar's guide precision grade. The higher the manufacturing and assembly accuracy and the higher the surface roughness level of the working part, the higher the durability of the stamping die.
5. Correct selection of press
In order to improve the durability of the stamping die, the press with higher precision and rigidity should be selected, and its stamping tonnage should be more than 30% of the punching pressure. Normally speaking, the service life of the die can be increased by dozens of times.
6. Reasonable use and maintenance of stamping die
In order to improve the durability of stamping die, the operator must use and maintain the stamping die reasonably. The stamping die should be maintained frequently to prevent the stamping die from working with defects.
The above are several common methods to improve the wear resistance of stamping die. The significance of improving wear resistance can not only increase the service life of stamping die, reduce the production cost of die enterprises, but also ensure the quality of products produced and improve the production efficiency. If you want to know more mold processing skills, please click Shandong mould http://www.jnhjgs.cn Official website.