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Spot welding electrode

A spot welding electrode and tungsten alloy technology, applied in the direction of electrode characteristics, welding equipment, welding medium, etc., can solve the problems of welding electrode wear, cost increase, energy consumption increase, etc.

Inactive Publication Date: 2016-04-20
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such high welding currents lead to higher costs, higher energy consumption and possible wear of the welding electrodes
The spot welding electrode of the related art has room for improving the durability of the electrode, and it is desired to provide an electrode with a longer service life

Method used

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Embodiment Construction

[0016] Hereinafter, embodiments of the present invention will be described in detail.

[0017] Embodiments of the present invention relate to a spot welding electrode comprising a copper alloy and a sintered tungsten alloy.

[0018] The copper alloy contained in the spot welding electrode of the embodiment of the present invention is an alloy containing copper (Cu) as a main metal. The elements other than copper contained in the copper alloy are not limited to specific elements. Examples of elements other than copper contained in the copper alloy include chromium (Cr), zirconium (Zr), nickel (Ni), silicon (Si), zinc (Zn), and beryllium (Be). From the viewpoint of preventing deformation of the electrode, the copper alloy preferably contains chromium and / or beryllium. The copper alloy may contain two or more of the above elements as elements other than copper.

[0019] The sintered tungsten alloy contained in the spot welding electrode of the embodiment of the present inventi...

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Abstract

A spot welding electrode (1) is provided and includes a copper alloy (3), and a sintered tungsten alloy (2) disposed in a tip portion of the spot welding electrode (1), with the tip portion of the spot welding electrode (1) being brought into contact with an object to be welded. The sintered tungsten alloy (2) is connected only at a single flat surface to the copper alloy (3). A thermal conductivity of the spot welding electrode (1) is within a range from 60 W / mK to 120 W / mK. Uses of the spot welding electrode (1) for spot welding alloy materials are provided.

Description

technical field [0001] The invention relates to a spot welding electrode. Background technique [0002] Spot welding is a highly efficient welding method among resistance welding methods, which is frequently used in assembly lines for assembling, for example, automobiles, airplanes, and rail vehicles. Electrodes used in spot welding need to have high electrical conductivity, high thermal conductivity, high strength and high wear resistance. Additionally, the material used for the electrodes needs to resist deformation to withstand continuous spot welding. Copper alloys such as Cu-Cr and Cu-Cr-Zr or with hard substances dispersed in them such as Al 2 o 3 Copper materials are used as materials for spot welding electrodes. [0003] In addition, spot welding electrodes each made of a composite material formed by combining two or more metal materials are known. For example, as a spot welding electrode made of a composite material, Japanese Patent Application Laid-Open No. 04...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/30
CPCB23K35/0205B23K11/30B23K35/222
Inventor 小仓修平尾楠和幸
Owner TOYOTA JIDOSHA KK
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