Extrusion and molding method for cup-shaped part and special extrusion die

Abstract

The present invention relates to a cup-shaped piece extrusion forming method and a special extrusion die. The extrusion forming method includes the following steps: 1) putting the billet to be extruded into the die, the extrusion forming die includes an inner convex die, the inner die The punch jacket is provided with an outer punch, and the outer punch and the inner punch are guided and slidably matched. The press has a power output shaft correspondingly connected with the outer punch and the inner punch. The inner punch goes down to extrude the billet, and the inner punch goes down to the thickness of the required part; 2) The lower end of the inner punch is pressed against the billet to keep it still, and the output shaft of the press connected with the outer punch drives the outer punch along the The outer peripheral surface of the inner punch is guided to slide downward and extrude the billet to extrude the required cup-shaped part; 3) After the extrusion is completed, the press drives the inner punch and the outer punch back to eject the formed part. The invention adopts the inner convex die and the outer convex die to extrude sequentially, the single extrusion area is small, and the tonnage of the extrusion equipment can be reduced, thereby reducing the production cost.

Description

technical field [0001] The invention relates to the technical field of extrusion forming of metal materials, in particular to a method for extrusion forming of a cup-shaped piece and a special mold. Background technique [0002] In extrusion molding, when the material of the extrusion blank is constant, the extrusion force is mainly related to the extrusion projected area and the degree of extrusion deformation. For the extrusion forming of ultra-large diameter (thin-walled) thin-walled cup-shaped parts, due to the large extrusion area, if a single-acting hydraulic press is used for one-time extrusion molding, the extrusion force will be relatively large, and the tonnage of the forming equipment required will be large. , The equipment input cost is high. Contents of the invention [0003] The object of the present invention is to propose a method for multiple extrusion molding of cup-shaped parts with small single extrusion force. The present invention also provides an ...

AI Technical Summary

Problems solved by technology

For the extrusion forming of ultra-large diameter (thin-walled) thin-walled cup-shaped parts, due to the large extrusion area, if a single-acting hydraulic press is used for one-time extrusion molding, the extrusion force will be relatively large, and the tonnage of the forming equipment required will be large. , high equipment cost

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