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

Abstract

The invention relates to an extrusion and molding method for a cup-shaped part and a special extrusion die. The extrusion and molding method comprises the following steps that (1) a blank to be extruded is put into a concave die, wherein the extrusion die comprises an inner convex die; an outer convex die is sleeved outside the inner convex die; the outer convex die is in guided sliding fit with the inner convex die; a pressure machine is provided with a power output shaft which is correspondingly connected with the outer convex die and the inner convex die; a corresponding output shaft of the pressure machine drives the inner convex die which is in transmission connection with the pressure machine to downwards extrude the blank; the inner convex die is moved downwards to the thickness of the needed part; (2) the lower end of the inner convex die is ejected against the blank to keep still; the output shaft on which the pressure machine and the outer convex die are in the transmission connection drives the outer convex die to slide downwards along the outer periphery of the inner convex die to extrude the blank to form the needed cup-shaped part; (3) after the extrusion is finished, the pressure machine drives the inner convex die and the outer convex die to return so as to eject the molded part. According to the extrusion and molding method for the cup-shaped part and the special extrusion die, the inner convex die and the outer convex die are extruded in sequence; the single-time extrusion area is small and the tonnage of extrusion equipment can be reduced so that the production cost is reduced.

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 ...

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