Specially-shaped extruding female die of aluminium alloy seamless gas cylinder

Abstract

The invention discloses a specially-shaped extruding female die of an aluminium alloy seamless gas cylinder, which comprises a bottom plate, an edge pressing ring, a specially-shaped backward extruding female die, an ejection block, a quenching hard plate and an ejection rod, wherein the specially-shaped backward extruding female die is in fit with the ejection block arranged on the bottom of the specially-shaped backward extruding female die to form a specially-shaped backward extruding female die semi-closed cavity, of which the bottom is a stepped variable section and which is provided with a sloped outline circumferentially; the quenching hard plate is arranged on the bottom plate; the combined ejection block and the specially-shaped backward extruding female die are placed on the quenching hard plate and connected to the bottom plate fixedly through the edge pressing ring and an edge pressing bolt sleeved on the specially-shaped backward extruding female die; and the ejection rod passes through the bottom plate and the quenching hard plate sequentially and is connected to the ejection block to form the specially-shaped backward extruding die of the aluminium alloy seamless gas cylinder. In the forming process of backward extrusion drawing of the gas cylinder, by the unique structural design of the specially-shaped extruding female die of the aluminium alloy seamless gas cylinder, the thickness of the metal of a sharp angle part at an edge of the bottom is reduced, the volume of the metal flowing to the centre of the bottom is reduced, the defect that the centre of the bottom of a cup body of the gas cylinder protrudes is solved, the process of subsequent processing of a protrusion on the bottom is cancelled, and the processing cost of a product is reduced.

Description

technical field [0001] The invention relates to an extrusion die for metal extrusion, in particular to an aluminum alloy seamless gas cylinder special-shaped extrusion die. Background technique [0002] In industrial production, many cup bodies need to be processed by extrusion dies. At present, aluminum alloy seamless gas cylinders generally use the process of reverse extrusion and deep drawing. The cup body processed by the conventional reverse extrusion die has a phenomenon that the center of the bottom protrudes during the deep drawing process, and the height of the protrusion often exceeds the original base surface by 5-8 mm, which seriously affects the standing of the cup body. In order to eliminate the bottom protrusion, the method of bottom pressure is generally adopted, that is, the center of the protruding bottom is flattened on the hydraulic machine tool, and then it is directly machined. Since the processing position is far away from the clamping position, tool v...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an aluminum alloy seamless gas cylinder special-shaped back-extrusion die that can effectively solve the problem of protruding bottom during the deep-drawing process of the back-extrusion cup, reduce processing steps, and reduce processing costs

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