Aluminum alloy double-sided friction stir welding process

Abstract

The invention relates to the technical field of welding. An aluminum alloy double-sided friction stir welding process comprises the following steps that firstly, two aluminum alloy plates to be welded are conveyed to a welding station through a feeding frame; a first side pushing mechanism and a second side pushing mechanism which are used for gathering two to-be-welded aluminum alloy plates are mounted on the welding station; a first pressing mechanism and a second pressing mechanism are mounted on the welding station; and secondly, a first side pushing mechanism and a second side pushing mechanism work, a first downward pressing mechanism and a second downward pressing mechanism conduct downward pressing, a welding assembly conducts welding work, the two stirring welding heads synchronously operate up and down, and the two to-be-welded aluminum alloy plates are welded to form a first assembly. By means of the method, the flatness of the welded part can be guaranteed to the maximum extent and can be controlled within 1 mm, resource waste caused by adjustment and repair in the later period is reduced, meanwhile, one-time clamping and point alignment processes can be reduced compared with single-face FSW welding, and efficiency is improved by more than one time.

Description

Technical field [0001] The present invention relates to the field of welding technologies, and is specifically a welding process. Background technique [0002] With the light weight of the car and the rapid development of rail transit, the proportion of aluminum alloy has increasingly larger, now today's high-speed rail compartment, automotive white car, aluminum alloy battery packs, etc., etc., thereby promoting The application of various welding methods of aluminum alloys, where FSW is particularly remarkable in recent years. [0003] At present, the manufacturing process of the mainstream battery pack on the market is a single-sided FSW for multi-bottom plate welding, and the bottom plate and the border are single-sided FSW or arc welding, and this method is limited to the bottom plate. Single FSW welding needs. Positive, anti-two welding, which leads to high welding deformation, low welding efficiency, and high welding tooling. Inventive content [0004] For problems in the ...

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Problems solved by technology

[0003] At present, the mainstream battery pack manufacturing process in the market is to use single-sided FSW to weld multiple base plates, and use single-side FSW or arc welding to connect the base plate and frame, but this method is limited to the need for single-sided FSW welding of the base plate. Front and back welding twice, which leads to problems such as large welding deformation, low welding efficiency, and high investment cost of welding equipment.

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