What are the processes required for the deformation of stainless steel tensile parts?
- Optimize the flange diameter, reduce the maximum tensile stress and reduce the deformation resistance. The lateral dimension of the die for the first deep drawing is increased, and the fillet of the die for the first deep drawing is enlarged. After the pre-drawing process is completed, the trimming process is added to remove excess material as much as possible, reduce the forming resistance of the stainless steel drawing material, and effectively prevent the material from cracking when it is further deformed.
2. Coat the surface of the mold with dry film lubricant (the main components are: nitrocellulose, oily alkyd resin, plasticizer, extreme pressure agent and other additives) to reduce the frictional resistance between the material and the mold surface during deformation. It makes it easier for the material to move from the deformation zone to the force transfer zone.
3. Combine the last two processes in the original process (i.e. forming, deep drawing, and flanging) into one (forming and flanging), so as not to increase the processing steps of the parts, so it can effectively control the processing cost. Reasonable preventive measures such as reasonable convex and concave die fillets, adding appropriate heat treatment procedures, and applying lubricant on the surface of the concave die can improve the success rate of stainless steel drawing parts.
