Gas protection device for front side of titanium alloy material weld joint

Abstract

The invention discloses a gas protection device for the front side of a titanium alloy material weld joint. The gas protection device comprises a threaded rod and two ventilation sliding blocks. The two ventilation sliding blocks are connected through the threaded rod, and the distance between the two ventilation sliding blocks is adjusted through nuts matched with the threaded rod. Each ventilation sliding block is provided with an air inlet, and an air inlet channel is machined in the ventilation sliding block along the air inlet. One or more vent hole sets are machined in the opposite faces of the two ventilation sliding blocks. Each vent hole set comprises one or more vent holes. The vent holes communicate with the air inlet channels. The axes of the vent holes of each vent hole set are distributed in a radial mode on the section perpendicular to the axis of the corresponding air inlet channel with the projection point of the axis of the air inlet channel as the center. By the adoption of the gas protection device, the effect that the gas protection device is separated from a welding gun is achieved, welding operation is not affected by the gas protection device, and flexible operation as conventional welding can be achieved.

Description

technical field [0001] The invention belongs to the technical field of engine manufacturing, and in particular relates to a front gas protection device for a welding seam of a titanium alloy material. Background technique [0002] The chemical properties of titanium alloys are extremely active at high temperatures. Tests show that titanium quickly absorbs hydrogen at 300 °C, oxygen at 600 °C, and nitrogen at 700 °C, and the main components of air are oxygen and nitrogen, so reliable inert gas protection is the key to titanium alloy welding. At present, there are two forms of protecting titanium alloys with inert gas during the welding process: one is to weld in a vacuum argon-filled welding chamber, and the other is to fix a special support cover on the welding torch. The vacuum argon-filled welding chamber is limited by the equipment space, which has constraints on the size of the product, and the operability of welding in the chamber is poor, and the production efficiency...

AI Technical Summary

Problems solved by technology

The vacuum argon-filled welding cabin is limited by the space of the equipment, which has restrictions on the size of the product, and the operability of welding in the cabin is poor, and the production efficiency is low; the special support method is better for automatic welding, and the manual welding The cover affects the operating angle of the welding torch and the sight line of the welding operator, and due to the instability of manual operation, the quality of manual welding of titanium alloys is unqualified and the reliability is poor

[0003] At present, the structure of the conventional titanium alloy manual argon arc welding cover is as follows: figure 1 As shown, there are the following defects in use: (1) To ensure the protective effect of the weld pool and the heat-affected zone, the welding torch must be kept perpendicular to the weld bead during welding operations, which affects the sight of the welding operator and is not conducive to observing the weld pool and heat-affected zone. Wire feeding operation can easily cause fluctuations in the welding process and lead to unstable quality; (2) This method has a short protection distance and is not suitable for continuous welding

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