What are the characteristics of stainless steel plate in stamping and drawing deep processing

Although the stainless steel plate is widely used in the industrial processing field due to its excellent performance, the stamping performance of the stainless steel plate is weak, the plate surface is easy to scratch, and the mold is easy to form a binder tumor, which makes the stamping quality and production efficiency will be greatly affected.

 

 

Although stainless steel plates are widely used in the industrial processing field due to their excellent performance, their stamping performance is weak and the plate surface is prone to scratching. Additionally, the mold is susceptible to forming a binder tumor, which greatly affects stamping quality and production efficiency.

 

Therefore, when stamping stainless steel plates, it is important to improve workpiece quality and mold life through considerations of mold structure, materials, heat treatment, and lubrication in order to better address existing issues in the stamping process of stainless steel plates.

 

 

Stainless steel sheet stamping processing products

 

The characteristics of stainless steel sheet stamping processing have the following points.  First of all, the yield point and hardness are high, the cold hardening effect is obvious, and it is easy to have defects such as cracks.  Secondly, the thermal conductivity is weaker than ordinary carbon steel, so that the required deformation force, punching force and drawing force are relatively large.  In addition, the plastic deformation of the sheet will be severely hardened during deep drawing, and the sheet is easy to wrinkle or drop the bottom.  The deep drawing die is prone to the phenomenon of bonding nodules, which makes the outer diameter of the parts seriously scratched.  In deep drawing, it is difficult to obtain the desired shape.

 

Then how can we solve the problem of stainless steel sheet stamping and drawing? After analysis, the generation of the above problems actually depends on the performance of stainless steel itself, that is, the performance of raw materials, the structure of the mold and the stamping speed, the mold material, the stamping lubrication fluid, and finally the arrangement of the process route.

 

 

First, let's talk about the quality factors of raw materials. Be sure to purchase regular raw materials that meet national standards. If it is a hard material, it must be annealed in the stamping process to enhance the processing performance.

The second is the structure of the mold and the stamping speed. In order to reduce the difficulty of deep drawing, the holder surface of the holder ring can be made inclined. In this way, the billet under the action of the blank holder ring will be completely in contact with the blank holder surface and the die, which can make the material at the rounded corner of the die bear relatively high holding force. The punching speed of stainless steel is 1/3 smaller than that of carbon steel, and practice shows that the effect of using a hydraulic press is far better than that of a mechanical punch.

 

The third is to choose the anti-stick mold material. Stainless steel material in the drawing process, the main problem is that the mold is more serious, so that the mold loss is more serious, thus affecting the appearance of the parts of the quality, therefore, to solve this problem must use anti-stick mold materials. Suitable anti-stick mold materials are mainly tungsten carbide, copper base alloy, 3054 alloy cast iron these several. In actual production, suitable materials can be selected according to their respective heat treatment equipment, output, cutting processing capacity, stamping requirements, etc.

 

 

The fourth point is that the stamping lubricating oil material should be properly lubricated when drawing, which can reduce the coefficient of friction between the material and the mold, thereby reducing the drawing force. Compared with lubrication and no lubrication, the drawing force can be reduced by about 30%. Moreover, it can also enhance the deformation degree of the material, reduce the limit drawing coefficient, thus reducing the number of drawing times, and more importantly, ensure the surface quality of the workpiece, so that the stainless steel surface is not bruised.

 

The last point is to arrange a reasonable process route. Because stainless steel material is not only high strength, deformation resistance, in the process of drawing plastic deformation and work hardening, resulting in changes in the mechanical properties of stainless steel material, its strength and hardness will be significantly increased, and its own plasticity will be reduced, metal cold processing deformation, grain breakage, lattice distortion, in an unstable state, that is, the residual internal stress. This internal stress makes the deformation of the drawing parts have a tendency to change the shape of the state, resulting in the long-term storage of finished products or semi-finished products will produce deformation or cracks.

 

 

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