Resistance welding method

A technology of resistance welding and resistance spot welding, applied in the direction of resistance welding equipment, welding equipment, electrode characteristics, etc., can solve the problems of low welding efficiency, failure to achieve welding effect, easy sticking of spot welding head to aluminum electrodes, etc., and improve the use of The effect of life and production efficiency

Inactive Publication Date: 2011-07-27
HUATING HEFEI POWER TECH
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Problems solved by technology

When CD spot welding thin aluminum electrodes in the production process, due to the small thickness of the welded aluminum foil, when the contact point is in a molten state, it is very easy to weld through the aluminum foil. Generally, after 10 to 15 times of spot welding, the spot welding head is easy to stick to aluminum. electrode, and the aluminum foil is welded through, so that the welding effect cannot be achieved
In order to make the spot welding head not stick to the electrode, the spot welding head must be cleaned frequently, and the welding efficiency is low

Method used

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Embodiment Construction

[0009] The resistance welding method of the invention can be used for resistance welding of aluminum electrodes of electric vehicle batteries. ， Adjust the parameters before welding, set the preload time to 650ms, the first time to 2s, the current to be 25% of the whole, and the number of pulses to 1. Install the aluminum electrode to be spot welded on the CD spot welding platform 4, and then put the The thin aluminum foil 5 is placed on the aluminum electrode 3, and then a thin copper foil 2 with a thickness of about 0.2mm is placed on the thin aluminum foil. Press the control pedal, and the CD spot welding head 1 welds the thin aluminum foil and the aluminum electrode. After the spot welding is completed Peel off the thin copper foil on the aluminum foil, and the soldering is complete. Because when welding thin aluminum electrodes, a thin copper sheet is separated between the spot welding head and the electrode, and the part that the spot welding head contacts during w...

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Abstract

The invention discloses a resistance welding method. When aluminum is spot-welded on a spot welding machine, the aluminum to be spot-welded is placed on a spot welding platform and is covered by a thin aluminum foil, the thin aluminum foil is covered by a thin copper foil, and welding parameters are adjusted to control a spot welding head to perform resistance spot welding. When a thin aluminum electrode is welded, the spot welding head is separated from the electrode by a thin copper sheet, and the part in contact with the spot welding head is the copper foil during welding, so that the welding head of the spot welding machine does not stick the thin aluminum electrode when the copper foil is used as a sacrificial layer. Therefore, after the copper foil is used as the sacrificial layer, the spot welding head does not stick the aluminum foil, so that the service life of the spot welding head is prolonged and the production efficiency is improved.

Description

[0001] technical field [0002] The present invention relates to a resistance welding method. Background technique [0003] Resistance welding is a pressure welding that makes the metal overlap and butt joints flow current, uses the contact resistance of the metal and the heating of the inherent resistance to make the contact part reach the melting temperature of the metal, and pressurizes the welded part in an appropriate way. When CD spot welding thin aluminum electrodes in the production process, due to the small thickness of the welded aluminum foil, when the contact point is in a molten state, it is very easy to weld through the aluminum foil. Generally, after 10-15 spot welding, the spot welding head is easy to stick to aluminum. electrode, and the aluminum foil is welded through, so that the welding effect cannot be achieved. In order to make the spot welding head not stick to the electrode, the spot welding head must be cleaned frequently, and the welding efficien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/11B23K11/30
Inventor 汪俊峰王昌友
Owner HUATING HEFEI POWER TECH
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