A laser hot wire tig hybrid welding system suitable for titanium alloy

Abstract

The invention discloses a laser hot wire TIG composite intelligent welding system suitable for titanium alloys, including an industrial robot, a laser welding head, a TIG welding power supply, a hot wire power supply, a TIG welding torch, a TIG wire filling mechanism, a wire filling copper pipe, a welding Seam tracking sensor, CCD camera, inert gas shielding device, switch; industrial machine is connected with laser welding head; TIG welding torch is connected with welding torch angle adjustment mechanism; welding torch angle adjustment mechanism is connected with laser welding head; TIG wire filling mechanism is fixed on On the laser welding head; the wire-filling copper tube is set at the lower end of the TIG wire-filling mechanism and connected to the laser welding head; the welding seam tracking sensor is connected to the wire-filling copper tube adjustment mechanism; the CCD camera is connected to the welding seam tracking sensor; the inert gas shielding gas The cover device is connected with the linear adjustment mechanism; the industrial robot is connected with the TIG welding power supply, the hot wire power supply, the seam tracking sensor and the laser welding head through the switchboard; this system is suitable for titanium alloy welding.

Description

technical field [0001] The invention belongs to the technical field of robot intelligent welding, in particular to a laser hot wire TIG composite intelligent welding system suitable for titanium alloys. Background technique [0002] Titanium is an important structural metal that developed rapidly in the middle of the 20th century. Because of its low density, high strength, heat resistance and corrosion resistance, it has advantages that other metals cannot improve structural efficiency, improve part reliability and reduce equipment quality. Alternative advantage. At present, titanium alloy has been widely used in aerospace, shipbuilding industry, chemical industry and medical equipment and other fields. However, the chemical properties of titanium alloy are lively, and it is very easy to have metallurgical reactions with the surrounding environment, causing problems such as cracks, pores, and embrittlement of welded joints. Due to the slow welding speed, the welding quality...

AI Technical Summary

Problems solved by technology

However, for titanium alloys, laser-TIG arc hybrid welding has certain disadvantages. At present, it is basically in the laboratory research stage and has not been widely used in the market. It is mainly reflected in the following aspects: (1) At present, laser-TIG arc hybrid welding Basically use cold wire filling, low deposition efficiency, slow welding speed, large heat-affected zone, and many welding passes, which will easily lead to large welding stress and residual deformation; (2) During the welding process of titanium alloy, the welded Due to the incomplete cooling of the temperature and the metallurgical reaction between the titanium alloy and the surrounding environment without inert gas protection, the welding quality is affected; (3) laser-TIG arc hybrid welding requires high precision of welding equipment, and at the same time has high requirements for the deformation of the welding workpiece. Accuracy adaptability; (4) Process parameters such as laser pulse energy, laser defocus, light wire spacing, light wire angle and welding speed are the main factors affecting the quality of laser-TIG arc hybrid welding. Basically, it is a customized design for a specific metal (such as aluminum alloy), and the parameters such as the distance between the light wires and the angle of the light wires cannot be adjusted. Pool and welding process status, unable to monitor the welding process quality in real time

CN110756995A only discloses a multi-degree-of-freedom adjustment laser arc composite welding torch structure, which is a combination of simple laser and arc welding torch, does not provide the welding system of composite robot laser hot wire, and does not have other tracking devices and corresponding welding processes. position adjustment device

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