Stainless steel plate for deep drawing, from the microscopic point of view, the surface of the sheet and the die are rough and uneven bond surface, due to the large blank holder force in the process of deep drawing, the load from the local convex part under the unit pressure is very large; Because of the relative movement between the sheet and the die and the plastic deformation of the sheet produces heat energy, the viscosity of the lubrication film decreases and the strength decreases; A convex on the sheet metal under high pressure, the instantaneous high temperature, the movement under the action of shear, lubricating membrane rupture, sheet metal, direct contact with the mould plate was scraped off to a convex mold into pieces to a convex convex die in front of people, such as the temperature is high enough, allow debris to soften, melting, dry welding on the mould, to form tumors. A bond tumor and the formation of it is difficult to fall off, and the more sticky the bigger, resulting in stainless steel sheet drawing product surface left serious scratches. In addition, drawing speed and sheet deformation size also play an important role in the formation of bonded nodules. How to avoid the formation of bonding nodules in drawing die and improve the surface quality of drawing parts is the technical problem in wuxi stainless steel plate drawing.
1, due to poor thermal conductivity than ordinary low carbon steel, resulting in the required deformation force;
2, stainless steel plate deep, plastic deformation severe hardening, thin plate deep easy to wrinkle, full to the larger blank holder force;
3. The rebound caused by bending and reverse bending of the sheet metal in the deep concave die fillet is usually formed in the side wall of the product, which makes the product with higher dimensional accuracy and shape requirements need to increase the shaping process to achieve.
4, stainless steel plate in the process of deep drawing is prone to the phenomenon of bonding tumor.
Post time: May-13-2022