Forging forming method and die for unequal-thickness shell part plate

Abstract

The invention discloses a forging forming method and a forging forming die for forming an unequal-thickness cylindrical shell piece plate by using a plate, which are different from the forging forming process of common traditional bar blanking, the forming method greatly saves the loss of raw materials, and can simplify the complicated traditional forming process into two steps, so that the cost is reduced, and the production efficiency is improved. The method comprises the specific steps that firstly, a male die moves downwards to extrude a blank, a metal material is forced to continuously flow to the inner side of the die, so that a thick-bottom cylindrical part is formed, finally, the thick-bottom cylindrical part is extruded, and the unequal-thickness cylindrical shell part with the center protruding structure is obtained. According to the method, the cylindrical shell parts with different thicknesses are formed by using simple plates, the complicated forming process steps of a traditional process are simplified, the defects of inner hole grooves and the like in combined extrusion of the traditional process are eliminated, the machining range of formed parts is expanded, and the production efficiency of the parts is greatly improved. Besides, according to the method that the stepped male die is used for compressing the thick plate to form the cylindrical part, due to the fact that the upper half portion of the metal plate mainly depends on three-direction pressure stress of the forming die, and the lower half portion of the metal plate freely flows under the action of downward extrusion of the die, the forming load of the metal plate can be greatly reduced, and the forming efficiency of the cylindrical part is improved. The die loss is further reduced; and the service life of the die is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of metal plastic forming, in particular to a forging forming method and a die for a shell plate of unequal thickness with a large drawing height. Background technique [0002] When stamping and forming cylindrical parts with large drawing heights, complicated and complex multi-pass drawing processes are often used, that is, multiple punches of different heights and different diameters are used to draw the outline of the parts for multiple times or use The deep drawing-flanging process forms extremely deep cylindrical parts, but at the same time, multi-pass drawing will face the difficult problem of complex process flow and keeping the center of front and back drawing consistent. In addition, the industry generally uses bars for forging to form the required parts, and this process often results in a great waste of raw materials. [0003] Therefore, how to change the current state of forming parts that requir...

AI Technical Summary

Problems solved by technology

[0002] When sheet metal stamping forms cylindrical parts with large drawing heights, a cumbersome and complicated multi-pass drawing process is often used, that is, multiple punches of different heights and different diameters are used to draw the shape of the part multiple times or use The deep drawing-flange process forms extremely deep cylindrical parts, but at the same time, multi-pass deep drawing will need to face the problem of complex process and keeping the center of front and back drawing consistent

In addition, in the industry, bars are generally used for forging and forming the required parts. This process often causes a great waste of raw materials.

Images