Combined double-shaft-shoulder friction stir welding fixture

Abstract

The invention discloses a combined double-shaft-shoulder friction stir welding fixture which comprises a clamping die block and a heat sink die block. The clamping die block comprises a fixed plate, a lower platform, a supporting plate and an upper platform which are fixedly connected from bottom to top in sequence. The supporting plate is provided with an exposed bearing end corresponding to the upper platform and the lower platform. The heat sink die block is a cooling panel and is placed on the bearing end of the supporting plate. The combined double-shaft-shoulder friction stir welding fixture is capable of meeting clamping requirements of trial panels with different thicknesses and different sizes, prevents the trial panels from distorting and moving up and down in the welding process due to axial acting force of a stir-welding head, is capable of achieving a test of extrusion force of the stir-welding head to a workpiece, and is simple in structure and strong in practicality.

Description

technical field [0001] The invention belongs to the technical field of technical material processing and welding, and in particular relates to a clamping tool for a welded workpiece of a friction stir welding machine. Background technique [0002] Double-shoulder friction stir welding is a new type of friction stir welding technology. During the welding process, the workpiece is clamped by the upper and lower shoulders. The lower shoulder replaces the backing plate device of conventional friction stir welding, so it does not need welding equipment to provide a lot At the same time, this friction stir head structure makes the upsetting force of the upper and lower shoulders equal in opposite directions, and the resultant force on the entire workpiece in the direction perpendicular to the plate is zero, which is very suitable for the welding of hollow components. Therefore, this method It has broad application prospects in shipbuilding, aerospace, rail transit and other fields...

AI Technical Summary

Problems solved by technology

[0003] The structure of the double-shaft-shouldered friction stirring head makes the stirring needle bear a great tension. At the same time, due to the travel resistance and lateral pressure in the welding direction and transverse direction, the stirring needle is easy to break, which not only affects the welding process, but also affects the welding process. Therefore, the force borne by the stirring needle is worthy of research and exploration; compared with the traditional friction stir welding fixture, the double-shouldered friction stir welding fixture not only needs to fix the material to be welded, but also needs to have sufficient internal space for easy installation Lower shoulder: the current domestic and foreign research on friction stir welding of double-shaft shoulders has just started, and the fixtures used are all simple pads, pressure blocks and calipers, which is not conducive to conveniently extracting the travel resistance and lateral pressure. Therefore, it is necessary to develop a set of fixtures that can detect the travel resistance and lateral pressure of double-shaft shoulder friction stir welding.

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