Method for welding and repairing copper surface defect of aluminum-copper composite board transition joint

A transition joint and welding repair technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of reducing production efficiency and increasing production costs, and achieve the effects of reducing labor intensity, increasing penetration depth, and reducing costs

Active Publication Date: 2013-06-05
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This production method not only increases the production cost, but also greatly reduces the production efficiency.

Method used

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  • Method for welding and repairing copper surface defect of aluminum-copper composite board transition joint
  • Method for welding and repairing copper surface defect of aluminum-copper composite board transition joint

Examples

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Embodiment 1

[0021] Such as figure 1 and figure 2 As shown, an aluminum-copper composite plate transition joint is prepared by explosive welding of copper plate and aluminum plate. The thickness of copper plate and aluminum plate is 15mm and 12mm respectively, and the depth of the pit on the copper surface of aluminum-copper cross-composite plate transition joint is 4.0mm. , first clean up the impurities in the area to be welded in the pits on the copper surface of the aluminum-copper cross-composite joint, preheat the welding start position of the area to be welded to 185°C, and start welding when the welding wire is made of the same material as the base metal (copper). Welding wire HSCu, the diameter of the welding wire is 1.0mm. During welding, tap water is introduced on the aluminum surface of the aluminum-copper composite plate transition joint for cooling. When the temperature of the copper surface welding area of ​​the aluminum-copper composite plate transition joint reaches 296 ° ...

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Abstract

The invention relates to a method for welding and repairing copper surface defects of an aluminum-copper composite board transition joint. The method comprises the following steps of: before welding, preheating a part to be welded at the temperature of 20020 DEG C so as to slow down heat loss of a welding area; filling and welding pit defects on a copper surface by utilizing an inert gas arc welding method, wherein the inert gas is a mixed gas of argon and helium; and introducing cooling water to an aluminum surface of the aluminum-copper composite board transition joint so as to reduce the heat introduced to a combination area interface of the aluminum-copper composite board transition joint. The welding method of the invention is simple and practical, not only improves the work environment, reduces the labor intensity of workers and the production cost, but also ensures that the partial peeling phenomenon does not occur in the welded aluminum-copper composite board transition joint.

Description

technical field [0001] The invention relates to a technique in the welding field of explosive welding composite materials, in particular to a welding repair method for copper surface defects of transition joints of aluminum-copper composite plates. Background technique [0002] Both aluminum and copper are good conductors of electricity and materials for making conductors. Copper reserves are small, output is small, processing is difficult and the price is high, while aluminum is the opposite. Therefore, in many cases in the power industry, it is necessary to replace copper with aluminum . Replacing copper with aluminum is an important technical measure for the development of the electric power industry. In many cases, the transition connection between copper and aluminum is an important issue to promote aluminum conductors and save copper. The mechanical connection between aluminum and copper is unreliable, and welding is required to reduce the resistance and power co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/04B23K9/16B23K9/235
Inventor 王小华徐宇皓郑晓军
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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