Novel friction stir welding stirring head

Abstract

The invention provides a novel friction stir welding stirring head. The stirring head comprises a connecting part, a stirring needle, a clamping part, a shaft shoulder, a threaded rod and two nuts. The connecting part is a cylinder. The stirring needle is mounted at one end of the shaft shoulder, and the stirring needle and the connecting part are coaxially arranged. The connecting part is provided with an inner threaded hole capable of being matched with the threaded rod. A mounting groove capable of being matched with the side, far away from the stirring needle, of the connecting part is formed in one end of the clamping part. The clamping part is further provided with an inner threaded hole capable of being matched with the threaded rod, and the inner threaded hole of the connecting part can correspond to the inner threaded hole of the clamping part in position. The shaft shoulder is mounted on the stirring needle, and the shaft shoulder and the stirring needle are coaxially arranged. The nuts are matched with the threaded rod. The using cost of the stirring head can be effectively reduced, and abrasion of the stirring head is effectively reduced as well.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a novel friction stir welding stirring head. Background technique [0002] Friction welding is a method of using the heat generated by the mutual movement and friction of the workpiece ends to make the ends reach a thermoplastic state, and then quickly upset to complete the welding. Friction welding can easily join the same or dissimilar materials, including metals, some metal matrix composites, ceramics and plastics. The friction welding method has been widely used in engineering because of its high productivity and good quality. The friction stir welding method is the same as the conventional friction welding, which uses friction heat and plastic deformation heat as the welding heat source. The difference is that the welding process of friction stir welding is that the stirring needle is inserted into the joint of the workpiece, and the high-speed rotation of the welding sti...

AI Technical Summary

Problems solved by technology

However, the one-piece type in the prior art has the need to replace the entire stirring head after the stirring needle is worn out, which leads to an increase in the cost of the friction stirring equipment used by the enterprise, while most of the split type stirring heads are complicated to install and it is not suitable to realize that the center of gravity of the stirring head is in the stirring position after installation. centerline of the needle

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