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Electron gun and its working method

A working method and technology of electron guns, applied in the field of electron guns, can solve the problems of easy breakage, shorten the life of lampshade, etc., and achieve the effect of prolonging life.

Active Publication Date: 2019-10-25
宁波创润新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The molybdenum pin of the existing electron gun is prone to breakage during the process of emitting electrons, which reduces the life of the lampshade

Method used

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  • Electron gun and its working method
  • Electron gun and its working method
  • Electron gun and its working method

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] There are many problems with the electron gun lampshade, for example, the lampshade of the electron gun has a short service life.

[0026] Combined with a method of using the electron gun lampshade, the reasons for the short life of the electron gun lampshade are analyzed:

[0027] During the process of smelting metal raw materials by electron gun, the emission cathode of electron gun is fixed on the bottom bracket, and the bottom bracket is fixed on the lampshade through the main bolt, and the heat-resistant and insulated spiral filament cathode is placed under the bottom bracket. Current flows through the filament cathode, which heats the emitter cathode, and when the emitter cathode reaches the temperature at which electrons are emitted, a beam of electrons is emitted. The electron beam concentrates on the surface of the metal raw material to melt the metal raw material. During the smelting process, due to the heating of the cathode by the filament, the main pin is ...

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PUM

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Abstract

The invention provides an electronic gun and a working method. The electronic gun comprises an emission cathode, a collet, a lampshade and a main bolt, wherein the collet is fixedly connected to the emission cathode; the lampshade has a main bolt hole and a standby bolt hole; and the main bolt is used for connecting the lampshade of the electronic gun and the collet through the main bolt hole andmaking the emission cathode be located in the lampshade. The lampshade has the standby bolt hole. When the electronic gun is used, the main bolt is in a high temperature environment. The main bolt iseasy to become brittle and hard at a high temperature so that the main bolt is easy to fracture during a disassembling process. If the main bolt hole generates deformation or the main bolt is fractured, a part of the main bolt is easy to be left in the main bolt hole so that the main bolt hole is blocked. If the main bolt hole is blocked, the lampshade can be installed through the standby bolt hole so that the service life of the lampshade can be prolonged.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to an electron gun and its working method. Background technique [0002] The electron gun is the electron injector of the accelerator, which emits an electron beam with a certain energy, a certain current intensity, a certain beam diameter and a certain emission angle and injects it into the accelerating tube. [0003] Electron gun is the energy source of electron beam melting (Electron Beam Melting, EBM), a vacuum melting method for metal melting by converting the kinetic energy of high-speed electron beams into heat energy as a heat source. Under vacuum, the cathode of the electron gun is heated to generate thermal electrons. Under the action of accelerating voltage, the thermal electrons accelerate towards the anode. Due to the effect of the focusing pole, the electron beam passes through the center hole of the anode and continues to move downwards. Through the multiple ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J29/48H01J29/02
CPCH01J29/02H01J29/48
Inventor 吴景晖姚力军雷孝吕
Owner 宁波创润新材料有限公司