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Preparation method and mould of liquid-solid composite forming copper cladding aluminum bus duct platoon blank

A copper-clad aluminum strip and composite forming technology, which is used in the manufacture of cables/conductors, rods/bars/wires/strip conductors, electrical components, etc. problems such as low rate, cladding and core material breakage, etc., to achieve the effect of simple production conditions, simple structure, and reduced times

Inactive Publication Date: 2011-01-26
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems of these processes are: the cleanliness of the billet is very high, the total processing rate from the wire billet to the finished product is low, and multiple annealing is required. Due to the large difference in mechanical properties between copper and aluminum, it is easy to lead to Defects such as local cracking at the interface, fracture of the cladding layer and the core material, etc., will result in a decrease in product yield and electrical conductivity

Method used

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  • Preparation method and mould of liquid-solid composite forming copper cladding aluminum bus duct platoon blank
  • Preparation method and mould of liquid-solid composite forming copper cladding aluminum bus duct platoon blank
  • Preparation method and mould of liquid-solid composite forming copper cladding aluminum bus duct platoon blank

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Effect test

example 1

[0011] Example 1: As shown in the figure, a mold for liquid-solid composite forming copper-clad aluminum bar busway blank consists of two half-moulds, namely half-mould I3 and half-mould II4, the half-moulds are inverted trapezoidal, and the mold type The cross-sectional shape of the cavity is a special-shaped structure, and the special-shaped structure is a rectangle in the middle, and the two sides are connected by arcs. There is an ejector 5 under the half-mold I 3 and half-mold II 4, and the upper part of the two half-mold cavities has a punch. 6.

[0012] Preparation before squeeze casting: pre-treat the copper pipe to remove oil stains (degreasing-cleaning-neutralization-cleaning-passivation-cleaning-drying), and preheat the squeeze casting mold to 100°C. At the same time, the aluminum alloy is smelted, refined at 680°C, and left to stand for 30 minutes.

[0013] Squeeze casting: figure 1 Lift the punch 6 in the mold shown, put a 60mm long, 20mm wide copper tube with a...

example 2

[0015] Example 2: As shown in the figure, a mold for liquid-solid composite forming copper-clad aluminum bar busway blank consists of two half-moulds, namely half-mould I3 and half-mould II4, and the half-moulds are in an inverted trapezoidal shape. The cross-sectional shape of the cavity is a special-shaped structure, and the special-shaped structure is a rectangle in the middle, and the two sides are connected by arcs. There is an ejector 5 under the half-mould I3 and half-mould II4, and the upper part of the two half-moulds has a punch 6.

[0016] Preparation before squeeze casting: pre-treat the copper pipe to remove oil stains (degreasing-cleaning-neutralization-cleaning-passivation-cleaning-drying), and preheat the squeeze casting mold to 450°C. At the same time, the aluminum alloy is smelted, refined at 750°C, and left to stand for 30 minutes.

[0017] Squeeze casting: figure 1 Lift the punch 6 in the mold shown, put the special-shaped copper pipe with a length of 100 ...

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Abstract

The invention relates to a preparation method and a mould of a liquid-solid composite forming copper cladding aluminum bus duct platoon blank, belonging to the field of the preparation technique of double-metal composite materials. The mould of the liquid-solid composite forming copper cladding aluminum bus duct platoon blank comprises two half dies which are in a reverse trapezoid shape, and a cross section of a mould cavity is in an irregular-shaped structure. The preparation method of the liquid-solid composite forming copper cladding aluminum bus duct platoon blank comprises the followingsteps: before the liquid-solid composite forming copper cladding aluminum bus duct platoon blank is formed, an irregular-shaped copper pipe is chemically processed and placed into the mould, and thenthe mould is preheated; an aluminum alloy is smelted, and aluminum liquid is poured into the irregular-shaped copper pipe after being stayed; pressure is released; stocks are pushed out; finally, thestocks are heated, and the stocks are also annealed after heat preservation and then cooled to room temperature. The invention enhances the productivity and the qualification of products, and the designed liquid-solid composite extrusion casting mould has simple structure and convenient operation.

Description

technical field [0001] The invention belongs to the field of preparation technology of bimetallic composite materials, and in particular relates to a method for preparing liquid-solid composite copper-clad aluminum busway blanking and a mold. Background technique [0002] Copper-clad aluminum busbar is a copper-aluminum bimetallic composite material, which is green, environmentally friendly, economical and applicable, and saves copper resources. Cabinets, high and medium frequency heating equipment, transformers and other industries. The copper-clad aluminum busway blank is the pre-finished product of the copper-clad aluminum busway, and its quality determines the quality of the final product. At present, there are electroplating method, rolling crimping method, cladding welding method and hydrostatic extrusion method for the preparation of copper-clad aluminum bus duct. The above methods all adopt the principle of solid-phase bonding, that is, through electrochemical or p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B5/02
Inventor 于宝义王峰李强陈岩邹良利
Owner SHENYANG POLYTECHNIC UNIV
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