Electron gun protection device for vacuum preheating electron beam welding device

Abstract

An electron gun protection device for a vacuum preheating electron beam welding device comprises an electric control sliding rail arranged on the inner wall of a vacuum chamber, the electric control sliding rail can drive a supporting block to move in the vertical direction through a drag chain, the end, away from the electric control sliding rail, of the supporting block is connected with a heat screen, and a connecting block is arranged on the side, facing an electron gun, of the heat screen. The connecting block is connected with one end of the heat insulation cylinder, the axial direction of the heat insulation cylinder is parallel to the axial direction of the electronic gun, the heat insulation cylinder can be driven by the electric control sliding rail to the position aligned with the electronic gun in the axial direction, and the electric control sliding rail, the supporting block and the electronic gun are all located in the projection of the heat insulation screen in the axial direction of the electronic gun. Double heat insulation of the heat insulation screen and the heat insulation cylinder can effectively protect the electron gun, the heat insulation screen can conduct heat insulation protection on the electric control sliding rail, the electron gun protection device can be matched with the welding process to move, heat insulation protection needed by the electron gun can be continuously provided at any time, it is guaranteed that the vacuum preheating electron beam welding process is smoothly and efficiently conducted, and the welding efficiency is improved. The service life of the welding device is prolonged.

Description

technical field [0001] The invention relates to the field of vacuum preheating electron beam welding devices, in particular to an electron gun protection device used for vacuum preheating electron beam welding devices. Background technique [0002] High-strength alloys have high strength, and with the development of metal material science and the wide application of new high-strength alloys, the application demand is increasing. However, in the face of the improvement of material strength, high-strength alloys have high cold crack sensitivity during welding, and rapid cooling after welding will cause a large amount of internal martensite to form, and the plastic and toughness of the weld area will be seriously reduced, which is difficult to meet the requirements of engineering applications. . The use of preheating welding method can effectively improve the welding performance, but when the preheating temperature is high, the difficulty of manual welding is significantly inc...

AI Technical Summary

Problems solved by technology

When the workpiece needs to be preheated at a high temperature before welding, the heat radiation generated by the heating device is likely to cause thermal damage to the internal devices, especially the electron gun, and affect the service life of the welding device.

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