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Method for producing modified half-hollw section of pure copper

A manufacturing method, semi-hollow technology, applied in the direction of metal extrusion dies, wire drawing dies, etc.

Active Publication Date: 2006-09-06
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, the existing production process problems are solved by changing the mold structure, so that the manufacture of pure copper semi-hollow profiles for electrical purposes can be easily extruded like ordinary solid profiles, and can be easily stretched like pipes , and the accuracy is much higher than that of pipe

Method used

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  • Method for producing modified half-hollw section of pure copper
  • Method for producing modified half-hollw section of pure copper
  • Method for producing modified half-hollw section of pure copper

Examples

Experimental program
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Effect test

Embodiment 1

[0067] A method for manufacturing a C-type high-precision pure copper semi-hollow profile. The method includes the following processing techniques:

[0068] 1. Hot extrusion process of V-shaped blank with enlarged opening

[0069] Heat a 46kg ingot that meets the quality standard of electrical pure copper to about 850℃, and use a V-shaped hot extrusion die 32 on an extruder with a water-sealed outlet (single or double-acting). Hard die hot extrusion process production. The cavity of the V-shaped hot extrusion die 32 is V-shaped, and its opening is larger than the opening required by the C-shaped material. The ratio of the area A between the tongue of the mold to the tongue base 6 and the area W of the axial section 10 of the tongue base width is ≤1.0.

[0070] The V-shaped hot extrusion die 32 is positioned with the tongue-shaped die holder 33 through the positioning pin hole 5, and is connected as a whole.

[0071] The outlet cone 8 is used to reduce the extrusion resistance and ...

Embodiment 2

[0083] A method for manufacturing C-shaped high-precision pure copper semi-hollow profiles. In addition to the use of 32kg pure copper ingots for processing, the hot extrusion die, cold drawing combined die and subsequent auxiliary straightening and shaping used in the rest of the processing process The machine and other process conditions are the same as in Example 1.

[0084] Through the mold support enhanced by Figure 5 Figure 4 The V-shaped hot extrusion die shown can be hot-extruded to obtain a dimensionally stable and high-precision V-shaped blank of 27.5kg. The blank yield rate is 85%, and the wall thickness tolerance of the blank is less than 2.5%. The blank is reserved for further cold drawing. 15% processing margin; passed Figure 6 The cold drawing combination die shown, press Figure 7 The cold drawing process for processing the semi-hollow profiles shown can obtain 25kg of high-precision C-profiles, with a yield rate of 90%, and the wall thickness tolerance of the C-...

Embodiment 3

[0087] A method for manufacturing a fork-shaped pure copper semi-hollow profile. The processing technology of the method is similar to that of Embodiment 1. When an ingot weighing 60 kg that meets the quality standard of pure copper for electrical purposes is processed under the same conditions as in Example 1, the fork-shaped pure copper material shown in Fig. 10 reinforced by the mold holder shown in Fig. 11 is used Approximately V-shaped hot extrusion die, can be hot-extruded to obtain dimensionally stable and high-precision fork-shaped blanks (approximately V-shaped or Y-shaped) 54kg, and the blank yield rate is 90%. The blank has a processing margin of more than 25% for further cold forming, and sufficient cold working margin is to ensure that the fork profile has 300N / mm 2 The necessary conditions for the above high strength.

[0088] Through the cold-drawn combination die used for processing fork-shaped pure copper semi-hollow profiles shown in Figure 12, press similar to F...

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Abstract

An improved technology for manufacturing the semi-hollow copper section includes hot extrusion with V-shaped hot extrusion die and cold drawing with a combined die composed of the core die with drawing rod and key and the external die with locating slot and coiled opening. Its advantages are long service life of its dies, high utilization rate of raw material, and high precision and strength of product.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C23/02B21C1/00B21C25/02B21C3/02B21D3/00
Inventor 董云伟
Owner 董云伟
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