Stainless steel processing some knowledge points

Stainless steel processing manufacturers think that stainless steel plate although excellent performance, widely used in the field of industrial processing, but its stamping performance is weak, the surface is easy to scratch, mold is easy to form sticky tumors, which will greatly affect the stamping quality and production efficiency. Therefore, when stamping stainless steel plate, it is necessary to improve the quality of the workpiece and the life of the mold from the Angle of mold structure, mold material, heat treatment, lubrication, so as to better solve the problems of stainless steel plate stamping.

Stainless steel processing manufacturers think that the characteristics of stainless steel plate in the stamping process are as follows. First, the defects are high yield point and hardness, obvious cold quenching effect, easy to crack and so on. Secondly, the thermal conductivity is weaker than ordinary carbon steel, so the deformation force, punching force, drawing force is relatively large. In addition, the plastic deformation of the sheet in the deep drawing process will be severely hardened, and the sheet is easy to wrinkle or fall off. The mold is easy to produce sticky tumor during deep drawing, which makes the outer diameter of the parts scratched seriously. In deep stamping, it is difficult to obtain the desired shape.

So how can we solve the problem of stainless steel sheet stamping and drawing? Stainless steel processing manufacturers think that the above problems actually depend on the performance of stainless steel itself, that is, the performance of raw materials, mold structure and stamping speed, mold materials, stamping lubricants, and finally the arrangement of the process route.

Let's start with the quality factors of raw materials and plates. Stainless steel processing manufacturers believe that we must buy regular raw materials in line with national standards. If it is hard material, it should be annealed during stamping to enhance the machining performance.

Secondly, die structure and stamping speed. Stainless steel processing manufacturers believe that in order to reduce the difficulty of deep drawing, the surface of the flange holder can be made of slanted. In this way, under the action of the blank holder ring, the blank will be in complete contact with the blank holder surface and the die during deep drawing, so that the material at the rounded corner of the die can withstand a larger blank holding force. The stamping speed of stainless steel is 1/3 lower than that of carbon steel. The practice shows that the effect of hydraulic press is much better than that of mechanical punch.

Three is to choose anti - stick mold material. Stainless steel processing manufacturers believe that in the process of stainless steel deep drawing, the main problem is serious mold adhesion, resulting in serious mold loss, which affects the appearance of parts. Therefore, to solve this problem, to use anti - stick mold materials. Suitable anti-stick die materials are mainly hard alloy, copper base alloy and 3054 alloy cast iron. In actual production, suitable materials can be selected according to the respective heat treatment equipment, yield, cutting capacity and stamping parts requirements.

The fourth point is that the stamping lubricant should be properly lubricated during deep drawing, which can reduce the friction coefficient between the material and the die, thus reducing the deep drawing force. Stainless steel processing manufacturers think that compared with no lubrication, lubrication when the pulling force can be reduced by about 30%. It can also enhance the deformation degree of the material and reduce the limit drawing coefficient, thus reducing the drawing times. More importantly, it can ensure the surface quality of the workpiece and prevent the stainless steel plate from being scratched.

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Pangyi Metalware (Shanghai) Co., Ltd.


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Pangyi Metalware (Shanghai) Co., Ltd.

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