A Punching Method for Improving Sectional Quality of Stamping Parts

Abstract

The invention relates to the technical field of metal stamping machining, in particular to a punching method for improving the sectional quality of a stamping part. The specific treatment steps include that before punching of the stamping part, the stamping position is determined; a high temperature and high pressure steam spraying gun is used for performing spraying treatment on a stamping position point, the work pressure of the high temperature and high pressure steam spraying gun is 350 bar, and the steam temperature is 150-160 DEG C; and after spraying treatment ends, punching is performed immediately, during punching, at the instant that the stamping part makes contact with a cutting edge, modifying coconut oil is fast sprayed onto the contact face of the punching face and the cutting edge, and liquid nitrogen is fast sprayed onto the contact face of the punching face and the cutting edge at the instant that the stamping part breaks away from the cutting edge. By means of the punching method for improving the sectional quality of the stamping part, the sectional quality of the stamping part obtained by means of final punching is good, the burr zone height is extremely small, the euphotic zone area is large and is 80% or above, and the fillet zone area is small.

Description

technical field [0001] The invention relates to the technical field of metal stamping processing, in particular to a blanking method for improving the cross-sectional quality of stamping parts. Background technique [0002] Punching is a stamping process that uses a mold to separate the sheet metal. It involves elastic deformation and fracture of the shearing process. Since the deformation behavior of the material is nonlinear, it experiences complex stress and strain states. Different process parameters will cause different crack propagation. Therefore, different cross-section quality is formed. Studying the blanking process is of great significance to prevent workpiece defects, inhibit tearing and control crack direction. Current research shows that the higher the punching speed, the higher the quality of the stamping section, and the higher the punching speed. The increase means that the requirements for blanking equipment have increased and the energy consumption of blan...

AI Technical Summary

Problems solved by technology

[0002] Punching is a stamping process that uses a mold to separate the sheet metal. It involves a shearing process of elastic deformation and fracture. Since the deformation behavior of the material is nonlinear and undergoes complex stress and strain states, different process parameters will cause different crack propagation. Therefore, different cross-section quality is formed. Studying the blanking process is of great significance to prevent workpiece defects, suppress tearing and control crack direction. Current research shows that the higher the punching speed, the higher the quality of the stamping section, and the punching speed The improvement of the punching equipment means the increase of punching equipment requirements and the increase of punching energy consumption. For some small enterprises, it is obviously not the best choice.