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Method for producing pure copper high precision semi hollow section bar

A manufacturing method and high-precision technology, applied in the field of manufacturing and metal processing, to achieve the effect of practical method, novel design concept and reduced production cost

Inactive Publication Date: 2004-02-11
董云伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the method provided by the present invention, by changing the mold structure, the existing production process problems are solved, so that the preparation of pure copper semi-hollow profiles for electrical purposes can be as easy to extrude as ordinary solid profiles, and as easy to stretch as pipes, and The accuracy is much higher than that of pipe

Method used

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  • Method for producing pure copper high precision semi hollow section bar
  • Method for producing pure copper high precision semi hollow section bar
  • Method for producing pure copper high precision semi hollow section bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A method for manufacturing a pure copper high-precision semi-hollow profile, comprising the following steps:

[0055] 1. Hot extrusion process for preparing V-shaped billet with enlarged opening

[0056] Heat the ingot that meets the quality standard of pure copper for electrician use to about 850°C, and use a V-shaped hot extrusion die (32) to Profile extrusion process production. The die cavity of V-type hot extrusion die (32) is V-shaped, and its opening is greater than the opening that C section bar requires. The ratio of the area A enclosed by the mold from the tongue to the tongue base (6) to the area W of the tongue base width section (10) is less than 1.4.

[0057] The V-type hot extrusion die (32) is positioned with the tongue-shaped die holder (33) by the positioning pin hole (5), and is connected as a whole.

[0058] The outlet cone (8) is used to reduce extrusion resistance and protect extruded products from being scratched.

[0059] The sizing belt (9) ...

Embodiment 2

[0069] A kind of manufacturing method of pure copper high-precision semi-hollow profile as in embodiment 1, but use the drawing machine stretching of adjustable die base, and straighten the bigger bending of semi-hollow profile at any time.

Embodiment 3

[0071] A method of manufacturing pure copper high-precision semi-hollow profiles as in Embodiments 1 and 2, but the cold-drawing combination die is made of high-alloy cold-working die steel.

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Abstract

The production process of high precision semi-hollow pure copper section bar includes extruding V-shaped blank in V-shaped hot extruding mold at about 850 deg.c and cold drawing in combined mold withlocating slot and core rod having hem. The V-shaped hot extruding mold has opening larger than that required in producing C-shaped section bar, and the combined mold is combined structure of separated core mold and outer mold with hem to make the blank enter to the mold cavity smoothly for homogeneous deformation. The drawn head is forged into size smaller than the aperture of the outer mold for penetrating through and is clamped with a clamp for drawing out to obtain finished product. The said method can produce section bar with precise and stable size and high strength in high yield.

Description

Technical field [0001] The invention relates to a method for manufacturing a high-precision semi-hollow profile of pure copper, in particular to a method for producing a semi-hollow profile of pure copper with a high-precision electrician by a single-action extrusion process and a stretching process with a mandrel, and belongs to the technical field of metal processing and manufacturing . Background technique [0002] Pure copper has the excellent electrical conductivity only second son silver, the crystal is face-centered cubic, and has good cold and hot plastic processing performance; and the stacking fault energy is low, dislocations are easy to expand and accumulate, the work hardening rate is large, and the mechanical properties of the product are easy to control . The chemical properties of pure copper are stable, and it is basically not corroded in the atmosphere, water, and water vapor; in the marine climate, a dense protective film can also be formed on the surface...

Claims

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Application Information

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IPC IPC(8): B21C1/00B21C23/04
Inventor 董云伟
Owner 董云伟
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