Friction stir welding tool posture and position calibration device and calibration method

Abstract

The invention discloses a friction stir welding tool posture and position calibration device and calibration method.The device comprises a camera, four prisms and a convex lens; the camera is located in the center of a main body support and fixed to the main body support through a camera fixing plate; a through hole is formed in the center of the convex lens, the convex lens is arranged on the camera fixing plate in a sleeving mode, a gap is reserved between the inner wall of the convex lens and the camera fixing plate, and the convex lens is connected with the main body support through a lens fixing plate and installed on the main body support through a base; the main body support is provided with a cover plate, the four prisms are circumferentially and uniformly distributed around the central axis of the camera, and laser heads corresponding to the prisms are arranged on the cover plate.The friction stir welding tool posture and position calibration device automatically simulates and corrects the angle and height of a stir head before welding without needing to destroy a surface structure of a weldment, is beneficial for further improving the welding quality and can conveniently change the pressing amount and the inclination angle according to the specific welding requirements.

Description

technical field [0001] The invention relates to a posture and position calibration device and a calibration method of a friction stir welding tool, belonging to the field of welding. Background technique [0002] Since the British Welding Institute (TWI) invented the friction stir welding method in 1991, this technology can eliminate welding defects such as pores, inclusions, cracks, etc. And it does not produce arc light, smoke, noise pollution, etc., and at the same time can significantly reduce costs, save materials, optimize structures, and reduce the structural weight of aircraft, etc., which have attracted the attention of scientific research institutions in various countries. Because this technology has many remarkable features that other methods do not have, it will soon be used in the aerospace field, and this method is selected for the welding of the longitudinal seam of the core tank section of the new generation of launch vehicles. Although high-quality welded j...

AI Technical Summary

Problems solved by technology

Although high-quality welded joints can be obtained by using the friction stir welding method, in actual engineering operations, the shape of the area to be welded is complex, and the traditional lathe-type friction stir welding is severely limited. It can only weld flat surfaces and cannot achieve complex workpiece surfaces. welding

Due to the complexity of the workpiece, the position of the welding tool needs to be changed and calibrated in time during welding, as described in the patent (application number 201510675554.6), but this calibration method has a small scope of application, and requires cumbersome preparations before welding. The equipment is huge and it is difficult to ensure the weld seam The strength consistency before and after is difficult to achieve on general friction stir welding equipment

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