Ultrasound-assisted resistance spot-welding device and method used for sheet metal materials
A resistance spot welding and ultrasonic-assisted technology, applied in the field of welding manufacturing, can solve problems such as large changes, electrode wear, and complicated devices, and achieve the effects of small ultrasonic vibration resistance, promotion of mass transfer and heat transfer, and high method adaptability.
Inactive Publication Date: 2019-07-19
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Abstract
The invention discloses an ultrasound-assisted resistance spot-welding device and method used for sheet metal materials, and belongs to the technical field of welding manufacturing. The ultrasound-assisted resistance spot-welding device comprises a resistance spot-welding electrode and an ultrasonic tool head located on one side of the resistance spot-welding electrode. The distance from the axisof the ultrasonic tool head to the axis of the spot-welding electrode is 2-15cm. The ultrasound-assisted resistance spot-welding method comprises the steps that (1) an electrode pressure is applied toclamp a welded workpiece, and the ultrasonic tool head is closely attached to the welded workpiece through a pressurization device, and an ultrasonic generator is started; (2) a resistance spot-welding power supply is turned on to output currents to form a spot-welding nugget; (3) output of the currents is stopped, and the welded workpiece is cooled and crystallized under the combined effect of the electrode pressure and ultrasonic vibration; and (4) after output of the currents is stopped for 50-200s, the ultrasonic generator is stopped. According to the ultrasound-assisted resistance spot-welding device and method, original resistance spot-welding equipment is not changed, and ultrasounds are directly applied to the welded workpiece; and after welding, the structure of the nugget is refined, and the porosity is reduced; and high-quality spot-welding connection of lightweight metal materials such as aluminum alloy is achieved.
Application Domain
Welding apparatus
Technology Topic
Ultrasonic generatorPower flow +12
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PUM
Property | Measurement | Unit |
Diameter | 8.0 | mm |
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