Aluminum alloy friction welding technology

Abstract

The invention relates to an aluminum alloy friction welding technology. The aluminum alloy friction welding technology includes the following steps that firstly, two parts are put on an equipment tool and are controlled by a computer program, the welding interfaces of the two parts are in contact through a servo motor and a main shaft on the equipment tool and move relatively for friction under the action of friction pressure, and mechanical energy is changed into heat energy; secondly, high-temperature thermal plasticity and friction pressure which are generated by friction heat are used for removing oxides on the welding interfaces, and after abrasion for a period of set time or a set length, a certain interface temperature and a certain temperature gradient are reached; and thirdly, braking and upsetting pressure applying are conducted and are kept for a period of time, welding is conducted under the effect that gravitation among atoms is larger than repulsion among atoms, and a firmly-combined reliable welding connector is formed through atom diffusion and recrystallization. The aluminum alloy friction welding technology has the beneficial effects of being good in welding quality and stability, convenient and safe to operate and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of friction welding welding technology, in particular to an aluminum alloy friction welding welding technology. Background technique [0002] Gas-shielded welding is widely used in the current industry. Gas welding is to connect two or several parts into a non-detachable integral component under the condition of heating (or simultaneous pressure) and relying on the bonding force between molecules in the molten metal state. process; the product structure of the above-mentioned gas shielded welding process is as attached figure 1 As shown, it has the following disadvantages: [0003] 1. The wide stress and deformation of the welding heat-affected zone is large, and the straightness deviation of the assembly is large; [0004] 2. The uneven size of the welding seam affects the appearance; [0005] 3. The surface of the weld is prone to defects such as undercut, pores, spatter, and arc craters; [0006] 4. D...

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Problems solved by technology

[0003] 1. The wide stress and deformation of the welding heat-affected zone is large, and the straightness deviation of the assembly is large;

[0004] 2. The uneven size of the welding seam affects the appearance;

[0005] 3. The surface of the weld is prone to defects such as undercut, pores, spatter, and arc craters;

[0006] 4. Due to welding deformation, the straightness deviation of the assembly is large, which eventually leads to a large initial unbalance of the drive shaft, and more counterweights affect the appearance and increase the production cost of bump welding;

[0007] 5. There are harmful substances such as light radiation, smoke, waste gas and waste residue in the fusion welding process, which has certain pollution to the environment and certain occupational hazards to the operators.

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