Method for increasing service life of aluminium alloy spot-welding electrode

A spot welding electrode, aluminum alloy technology, applied in welding equipment, resistance welding equipment, metal processing equipment and other directions, can solve the problem of insignificant effect, and achieve the effect of low cost, easy realization and wide source.

Inactive Publication Date: 2012-05-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, compared with the spot welding connection of low carbon steel, the effect of the above measures is still not significant. Therefore, on the basis of the existing technology, how to further improve the service life of the electrode, reduce the influence of the non-conductive medium, and prevent the electrode-aluminum plate Interval arcing is the key to further research

Method used

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  • Method for increasing service life of aluminium alloy spot-welding electrode
  • Method for increasing service life of aluminium alloy spot-welding electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The thickness of the 2024 aluminum alloy plate to be welded is 0.5mm, using 800 # Grind the contact part of the aluminum plate to be welded with the electrode with sandpaper or a grinding wheel until the oxide film on the surface is removed and the wear debris is removed, and the part of the ground aluminum alloy plate that is in contact with the electrode is coated with graphite-oil paint, graphite-oil paint, etc. 20W-30 engine oil is used as a dispersant, which contains 2wt% of flake graphite, and the graphite particle size is 0.2μm. Then the electrode is brought into contact with the aluminum alloy plate to be welded at a moving speed of 1mm / s, and the aluminum alloy plate to be welded is clamped in the Between the spot welding electrodes, current spot welding is used, using a capacitor voltage of 200V, a welding current of 8000A, a welding time of 0.04s, and an electrode pressure of 500N. After completion, change to another spot to be welded and repeat the above oper...

Embodiment 2

[0021] The thickness of the LF6 aluminum alloy plate to be welded is 0.8mm, using 1000 # Grind the contact part of the aluminum plate to be welded with the electrode with sandpaper or a grinding wheel until the oxide film on the surface is removed and the wear debris is removed, and the part of the ground aluminum alloy plate that is in contact with the electrode is coated with graphite-oil paint, graphite-oil paint, etc. 10W-40 engine oil is used as a dispersant, which contains 4wt% flake graphite, and the graphite particle size is 0.8μm. Then the electrode is brought into contact with the aluminum alloy plate to be welded at a moving speed of 30mm / s, and the aluminum alloy plate to be welded is clamped in the Between the spot welding electrodes, conduct current spot welding, adopt capacitive voltage 300V, welding current 15000A, welding time 0.02s, electrode pressure 1200N, change to another spot to be welded after completion, repeat the above operation 600 times, the surface...

Embodiment 3

[0023] The thickness of the 6061 aluminum alloy plate to be welded is 1.2mm. Use 1000 # Grind the contact part of the aluminum plate to be welded with the electrode with sandpaper or a grinding wheel until the oxide film on the surface is removed and the wear debris is removed, and the part of the ground aluminum alloy plate that is in contact with the electrode is coated with graphite-oil paint, graphite-oil paint, etc. 15W-50 engine oil is used as a dispersant, which contains 5wt% flake graphite, and the graphite particle size is 1.2μm. Then the electrode is brought into contact with the aluminum alloy plate to be welded at a moving speed of 60mm / s, and the aluminum alloy plate to be welded is clamped in the Between the spot welding electrodes, conduct current spot welding, use a capacitor voltage of 350V, a welding current of 30000A, a welding time of 0.03s, and an electrode pressure of 2000N. After completion, replace another spot to be welded. Repeat the above operation 7...

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Abstract

The invention relates to a spot-welding electrode, in particular to a method for increasing the service life of an aluminium alloy spot-welding electrode, which is characterized by comprising the following steps of: grinding a part of an aluminium alloy plate to be welded to be contacted with the electrode and coating graphite-engine oil paint on the part, enabling the electrode to contact with the aluminium alloy plate to be welded with the movement speed of 1-100 mm/s, clamping the aluminium alloy plate to be welded between the spot-welding electrodes, carrying out spot welding by electrifying, and replacing another point to be welded after completing, thus, repeating above operations, wherein the spot-welding electrode can be ensured to have longer service life.

Description

technical field [0001] The invention relates to a spot welding electrode, in particular to a method for improving the service life of an aluminum alloy spot welding electrode. technical background [0002] Spot welding is a high-speed and economical connection method, which is suitable for thin plate members whose joints do not require airtightness and small thickness. The spot welding process consists of four basic procedures: preloading, welding, maintenance and rest. Additional procedures can be added if necessary ; At present, two kinds of electrodes are mainly used in spot welding, frustum-shaped and spherical electrodes. The diameter d of the end face of the truncated cone-shaped or the arc radius R of the spherical end determines the contact area between the electrode and the weldment. , which determines the size of the current density and the distribution range of the electrode pressure; generally choose the end size required for the diameter of the working surface a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/34B23K11/11
Inventor 陈刚侯文胜赵玉涛周小亮
Owner JIANGSU UNIV
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