Mold and method for manufacturing inner and outer double pipe with ribs in the middle by extrusion method

Abstract

Disclosed are a die and method for manufacturing an inner and outer pipe workpiece with separation ribs in the middle through an extrusion method. The die comprises a male die body and a female die body which are vertically and coaxially arranged. The top end of the male die body is fixed to the lower portion of an upper die plate, and the female die body is fixed to the upper portion of a lower die plate. An ejector rod is arranged in a through hole in the middle of the lower die plate in a sliding manner. The convenient extrusion method is provided under the condition that the heights of an inner pipe, an outer pipe and separation ribs are different, and the die is novel and unique in design. The surface of a product is free of weld joints, and the die can adapt to places with high requirements for strength. The die is easy to machine and low in manufacturing cost. In the extrusion process, work stress is low, the tonnage of needed equipment is low, the die is not prone to being damaged, economical benefits are high, and cross sections of extrusion parts do not need to be consistent. Along with rapid development of the industry, the application range of the inner and outer pipe workpiece with the separation ribs of this kind is wider and wider, and the extrusion moulding method and the die structure have the great application prospect in industrial production.

Description

technical field [0001] The invention relates to a mold and a method for manufacturing a workpiece with ribs in the middle of an inner and outer double pipe by an extrusion method. It is used in the field of light alloy, ferrous and non-ferrous metal forming, aiming at the requirement of no weld seam, the outer tube is trumpet-shaped, the end face of the rib is full, the height of the inner and outer tube is controllable, the shape is complex, and the cross-section of the rib is variable A method and method for extrusion forming of a double-tube ribbed part. Background technique [0002] In the modern light alloy plastic forming method, the inner and outer tubular parts with ribs 33 (outer pipe 31 and inner pipe 32 both ends are flush, see figure 1 and figure 2 ) is generally formed by horizontal extrusion, but horizontal extrusion needs to use a serpentine die or a plane splitter die. During extrusion, the ingot material is shunted into 7 sections of metal by the upper br...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a method and mold for manufacturing inner and outer double-pipe workpieces with ribs in the middle by extrusion method, so as to solve the problem that there are many weld seams on the surface of the product in the prior art, which cannot adapt to places with high strength requirements; mold processing Complexity, high manufacturing cost; high working stress during extrusion, large tonnage of equipment required, easily damaged molds, low economic benefits, and cross-sectional graphics of extrusion parts must be consistent. The limitation of horizontal extrusion is that extrusion The cross-sectional size of the pressed piece must be consistent and cannot be changed

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