Using appropriate lubricant has obvious effect on the drawing of stainless steel. The lubricant can form a film with certain toughness and elongation between the convex and concave die, which is conducive to the deep drawing of stainless steel.
For stainless steel drawing parts with large deformation and difficult forming, polyfluoroethylene film can be used as lubricant in practical production. Polyfluoroethylene film has excellent tear resistance, toughness and elongation, and is easy to clean. After coating the dry film, the dry film can deform with the billet in the drawing process, and the billet can always be separated from the mold. In addition, the film itself has certain porosity and a large number of fiber cracks, so it can also store certain lubricating oil, so the film is equivalent to a layer of dry film lubricant. This lubrication method can effectively isolate the deformed stainless steel plate from the surface of the mold, the lubrication effect is good, and is conducive to improving the service life of the mold and the qualified rate of the product.
In addition, there are some other simple preventive measures such as the use of white cast iron as a flange ring grinding tool, because of the good oil storage performance of white cast iron, easy to form lubricating oil film; Another example is the use of conical holder ring; In addition, the workpiece edge processing smooth, remove the micro crack gap, can also effectively prevent cracking.
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