Vacuum temperature adjustment type extrusion molding method of copper part

A technology of extrusion forming and vacuum, which is applied in the direction of metal extrusion dies, etc., can solve the problems of long process flow, achieve the effects of improving forming precision, improving dislocation density and plastic deformation ability, and preventing oxidation
CN108311549AInactive Publication Date: 2018-07-24NO 59 RES INST OF CHINA ORDNANCE IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NO 59 RES INST OF CHINA ORDNANCE IND
Publication Date
2018-07-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a vacuum temperature adjustment type extrusion molding method of a copper part. The vacuum temperature adjustment type extrusion molding method is characterized by comprising the following steps: putting a copper blank with the initial temperature of -150 DEG C to 20 DEG C into an extrusion lower die cavity; then extruding the blank under the action of an upper die; when the upper die moves to designed displacement, keeping pressure of the blank; the carrying out vacuumizing treatment on a device space where the upper die and a lower die are arranged, wherein the vacuumdegree is -0.095MPa to -0.09MPa; meanwhile, heating the lower die and controlling temperature, wherein the temperature of a concave die is 20 DEG C to 300 DEG C; when the concave die reaches designedtemperature, continually downward moving the upper die and carrying out extrusion deformation on the blank; after the extrusion is finished, pressurizing the device space to atmospheric pressure; then returning back the upper die and taking materials. By adopting the method disclosed by the invention, the deformation capability of metal can be increased and elastic deformation is reduced; the comprehensive performance of the copper part is improved and molding procedures are reduced.
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Description

technical field

[0001] The invention relates to a method for extruding and forming a copper piece with vacuum and temperature. Background technique

[0002] The control of tissue performance and dimensional accuracy is very important for the manufacture of copper parts. The process method of large plastic deformation and annealing can refine the crystal grains of the copper billet, but the process flow of this method is relatively long. At the same time, in the forming process of copper parts, the greater the deformation, the more significant the increase of flow stress, the difficulty of forming, and the large amount of elastic deformation, which has a great influence on the structure performance, especially the dimensional accuracy. Contents of the invention

[0003] The object of the present invention is to provide a vacuum-conditioned and temperature-controlled extrusion molding method.

[0004] In order to achieve the above purpose, the following technical solutions...

Claims

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