On-line detection device for temperature and reduction during friction stir welding

Abstract

The invention discloses an online detection device for temperature and downward-press amount in a friction stir welding process. The online detection device comprises a circular fixture, a frame typesupport, an adjusting assembly, a temperature detection module, a downward-press amount detection module and an industrial personal computer, wherein the circular fixture, the frame type support and the adjusting assembly are mounted on a friction stir welding main shaft, the temperature detection module and the downward-press amount detection module are mounted on the adjusting assembly, the industrial personal computer is in communication connection through data wires, the circular fixture comprises semicircular fixtures, an adjusting fixing device and a silica gel pad, and is located abovethe frame type support, and the adjusting assembly comprises guide rails, sliding blocks, a fixed shaft, a rotating shaft, an adjusting block, a shaft seat, a shaft sleeve and a sensor support. According to the detection device, through the frame type support, an infrared thermal imager and a laser ranging sensor move along with a stirring needle in the friction stir welding process, so that the effect of being influenced by a welding base material and a welding process is avoided, and the temperature and the downward-press amount of the friction stir welding process can be detected online sothat the welding state can be conveniently analyzed in time, and the welding quality can be ensured.

Description

Technical field [0001] The invention relates to a detection device for temperature and reduction, in particular to an online detection device for temperature and reduction in a friction stir welding process. Background technique [0002] Friction stir welding is a key connection technology for lightweight metal structures invented by Wayne Thomas and others in the Cambridge Welding Association of the United Kingdom in 1991. Compared with the original welding process, this technology has simple principles, fewer control parameters, and reduces the welding process. The influence of human factors has improved the safety conditions and welding quality. It is widely used in aerospace manufacturing, shipbuilding, nuclear energy industry and other fields. The research on friction stir welding technology is attached great importance to the research of friction stir welding technology at home and abroad. The research mainly focuses on the friction between the stirring head and the workpiec...

AI Technical Summary

Problems solved by technology

Existing friction stir welding equipment mainly measures the rotation angle of the output shaft of the executive motor or the coordinate space of the head moving on the guide rail through the encoder installed on the executive motor or the grating scale installed on the guide rail. The position in , calculate the depression of the stirring head, this calculation is accurate for ideal rigid bodies, but for most welding base metals, when unexpected deformation occurs due to flexibility, the depression will be offset

Images