Stainless steel tensile material

Stretch with stretch oil is the best, but more expensive, first with rapeseed oil to try, if you can, with rapeseed oil pull. To stretch without wrinkle and rupture, it is necessary to control the gap between punch and concave die, and the gap can not be greater than a thickness. Small silk is best. The R of the concave die should be repaired, the pressure of the material plate should be adjusted well, and the tightness of the pressure should be appropriate. It is too loose to wrinkle easily, and too tight to break easily. Try to come.

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