Double-mold key hole-free stirring friction spot welding equipment

Abstract

The invention discloses double-mold key hole-free stirring friction spot welding equipment which comprises an outer shell (5), wherein a grip (6) is arranged on the top of the outer shell (5), and a power motor (1) is mounted in the outer shell (5); the power motor (1) is connected to a driving shaft (25) through a bush coupling (7), the driving shaft (25) is engaged to a driven shaft gear (9) ona driven shaft (26) through a driving shaft gear (8) on the driving shaft (25), and the driven shaft (26) is connected to the upper end of a main shaft (11) through a guide flat key (10); and a probe(12) is mounted at the lower end of the main shaft (11) through a thread. On the basis that key hole-free stirring friction spot welding is achieved, the size and weight of the equipment are reduced greatly, the demand on physical agility and skill of an operator is reduced, and meanwhile, the equipment has two welding modes which can be selected preferentially according to the welding condition,so that the equipment fully exerts a welding potential.

Description

technical field [0001] The invention belongs to the technical field of spot welding, in particular to a dual-mode keyhole-less friction stir spot welding equipment. Background technique [0002] In recent years, aluminum, magnesium and other lightweight alloys have been widely used in automobiles, locomotives, aerospace and other fields, and their connection technology has inevitably become the focus of research. At present, the more common aluminum alloy welding technology is resistance spot welding. The characteristics of resistance spot welding determine that it has the advantages of less consumables and lower product quality. However, the resistance spot welding of aluminum alloys, especially high-strength aluminum alloys, faces some difficulties: first, metallurgical defects such as pores and cracks are prone to appear in the joints, which significantly reduces the quality of the joints; second, the electrode life of aluminum alloy resistance spot welding is longer than...

AI Technical Summary

Problems solved by technology

The current keyhole friction stir spot welding equipment is mainly developed by the German GKSS Research Institute and Riftic Company. Its disadvantages are that the equipment is bulky, the control system is complicated, and the price is expensive. When the needle moves up, the sleeve and the probe need to be equipped with control systems to achieve the desired effect

[0005] Due to the large size of the current friction stir spot welding equipment, complex control, limited working dimensions, and less dense joints, the flexibility is poor when welding small areas or large complex structural parts, and the welding mode cannot be adjusted according to the actual situation. regulation, in which case the present invention applies

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