Mould for extruding aluminum alloy

Abstract

The invention discloses a mould for extruding aluminum alloy. The mould comprises a flow guide mould and a section mould, which are arranged at the front and the back along a fluid direction, wherein the corresponding cavity sizes of the flow guide mould and the section mould are designed according to parts, the flow guide mould consists of a sinking table and a transition cavity, the sinking table is in an inner cone structure, the front end of the transition cavity is in a counter bore structure, the diameter size of the counter bore structure is less than the diameter of an external circle, the rear end of the counter bore structure further adopts a broadsiding structure, and a connection place between the cavity and the flow guide mould is in an inverted cone structure. The mould disclosed by the invention has the beneficial effects that the flow guide mould of the side broadsiding of the first counter bore is designed, an ingot is peeled by the side broadsiding of the first counter bore, the extrusion force and broadsiding pre-deformation can be reduced, the high-precision forming can be carried out by the inverted cone section mould, and the extrusion force can be further reduced as well as the tissue can be further improved.

Description

technical field [0001] The invention relates to a high-strength aluminum alloy extruding die, in particular to a die for extruding aluminum alloy. Background technique [0002] Facing the ultra-large and ultra-thick aluminum extrusion material of 7075 ultra-high-strength aluminum alloy for aviation, the diameter of the circumscribed circle reaches 376mm, and the oxidation surface treatment of the product after machining is required to be free of black lines, coarse grains, and striations. The industry generally adopts more than 8,500 tons of extrusion machines and Ф432mm round ingots for production. At present, the diameter of the largest round ingots of 5,500 tons of extrusion machines is only Ф381mm. Therefore, 5,500 tons of extrusion machines are facing equipment bottlenecks. : First, the tonnage of the extrusion machine is not enough to squeeze, and the second is that the ingot is too small. If the wide expansion die is used directly, it can still be extruded for common ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a peeling and pressure-reducing extrusion die that "first sinks the hole wide and expands and then reverses the cone", so as to solve the insufficient forming, structure and extrusion force of the super-large section of high-strength hard aluminum alloy produced by the small-tonnage extrusion machine the puzzle

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