A device and method for laterally applying ultrasonic energy based on a combination of rollers and stirring heads

Abstract

The invention discloses an ultrasonic energy transverse applying device and method based on rolling column and stirring head combination, solves the problem of time delay of ultrasonic vibration and amechanical effect of a stirring head or incapability of realizing effective coupling of the two in the prior art, and has the beneficial effects of improving plastic flowing of metal in the welding process and realizing synchronous coupling of a thermal effect of the stirring head and an ultrasonic softening effect. The ultrasonic energy transverse applying device based on rolling column and stirring head combination comprises a sleeve fixture; the sleeve fixture is connected with an ultrasonic generation mechanism; one end of the sleeve fixture is connected with a pushing mechanism, and a rolling column tool head is arranged at the other end; the stirring head for welding workpieces is arranged at the side part of the rolling column tool head; the axis direction of the stirring head is perpendicular to the axis direction of the rolling column tool head; the pushing mechanism drives the sleeve fixture to move towards the stirring head; and ultrasonic energy is transferred to the stirring head through contact between the rolling column tool head and the stirring head.

Description

technical field [0001] The invention relates to the field of friction stir welding, in particular to an ultrasonic energy lateral application device and method based on a combination of a roller and a stirring head. Background technique [0002] Friction Stir Welding (FSW) is a solid-phase welding technology that can obtain high-quality joints that are difficult to weld by conventional methods. It is currently mostly used in the field of aluminum alloy structure manufacturing. Conventional FSW relies on the frictional heat between the stirring head and the material to be welded and the heat generated by the plastic deformation of the material to soften the material to be welded. There are problems such as low welding speed and large welding load. The bearing capacity of the welding machine, the accuracy and rigidity of the welding fixture , The wear resistance of the mixing head puts forward very high requirements. The method of applying ultrasonic energy to the FSW process...

AI Technical Summary

Problems solved by technology

However, in this scheme, the ultrasonic vibration is applied to the direct mode of the workpiece in front of the stirring head, which will cause the ultrasonic softening to occur earlier than the FSW thermal-mechanical process, and there is a time lag in the local action of the ultrasonic tool head and the stirring head on the workpiece, which cannot be realized Simultaneous coupling of the mechanical action of the stirring head and the ultrasonic softening effect, so that the role of ultrasonic vibration in improving welding quality cannot be fully utilized

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