Static shaft shoulder stirring friction welding method

Abstract

The invention relates to a static shaft shoulder stirring friction welding method. The method is characterized in that non-zero angle welding is adopted, a stirring tool is lifted by a certain angle along the welding direction, so that an included angle between the axis of the stirring tool and the welding plane is 90-alpha, wherein the alpha is a lifting angle, and the alpha is equal to 1-2.5 degrees, so that the front half part of the static shaft shoulder is slightly away from the welding plane, a certain gap exists between the surface of the static shaft shoulder and the weld joint. According to the static shaft shoulder stirring friction welding method, the welding seam forming of the static shaft shoulder stirring friction welding is greatly improved, the probability that the weldingseam has a tunnel is reduced, no influence is caused to the forming of the weld joint whether a welding flux is attached to the static shaft shoulder or not in the welding process, meanwhile, the process window of the static shaft shoulder stirring friction welding is expanded, so that the influence of the welding process parameters on the welding effect is really reflected by ensuring the forming condition of the weld joint.

Description

technical field [0001] The invention relates to a static shaft shoulder friction stir welding method, which belongs to the technical field of friction stir welding. Background technique [0002] Static shoulder friction stir welding is a new type of friction stir welding technology. Since the shoulder does not rotate with the stirring tool during the welding process, the heat input generated is small. It is suitable for materials with low thermal conductivity, and the smoothing effect of the static shoulder makes The surface of the weld seam is flat and smooth. However, static shoulder friction stir welding is an emerging technology. The published data at home and abroad show that this technology only stays in the laboratory, and there are no examples of large-scale engineering applications. The research and application are still immature. [0003] At present, in the research of static shaft shoulder friction stir welding welding method at home and abroad, zero-angle weldin...

AI Technical Summary

Problems solved by technology

However, static shoulder friction stir welding is an emerging technology. The published data at home and abroad show that this technology only stays in the laboratory, and there are no examples of large-scale engineering applications. The research and application are still immature.

[0003] At present, in the research of static shaft shoulder friction stir welding welding method at home and abroad, zero-angle welding is mostly used, that is, the stirring tool is perpendicular to the weld plane, but the disadvantage of this method is that at the initial stage of welding, some materials of the weldment will stick "Scratches" the weld on the shoulder surface, causing severe tunneling on the weld surface

[0004] However, the above method does not take into account the welding angle of the machine head, the success rate is not high, and it will also reduce the process window of static shoulder friction stir welding, so that some applicable process parameters cannot be used

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