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An electron gun device for fused wire additive manufacturing

An additive manufacturing, electron gun technology, applied in electrode devices and related components, cathode ray/electron beam tube electron guns, additive manufacturing, etc., can solve the problem of affecting the stability of the working process, reducing the freedom of fuse forming, and shortening the service life of the cathode and other problems, to achieve the effect of improving the fuse forming efficiency, ensuring long-term stable work, and improving the service life

Active Publication Date: 2022-04-29
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The metal vapor generated during the processing is easy to contaminate the cathode and insulator, which shortens the service life of the cathode, and the pollution of the insulator is prone to discharge, which affects the stability of the working process
In addition, the shaft-side wire feeding mode has a shadow area heated by energy, which reduces the degree of freedom of fuse forming; the bending disturbance of the metal wire is constantly changing, and the centering of the wire bundle is difficult, which affects the forming efficiency; compared with the forming area, the wire material The area is very small, the electron beam energy received by the wire is much smaller than that received by the formed part, and a large amount of heat input can easily lead to a coarse microstructure of the formed part

Method used

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  • An electron gun device for fused wire additive manufacturing
  • An electron gun device for fused wire additive manufacturing
  • An electron gun device for fused wire additive manufacturing

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0036] figure 1 It is a schematic diagram of the overall structure of an electron gun device for fuse additive manufacturing according to an embodiment of the present invention, such as figure 1As shown, it includes a slide plate 17 installed on the electron gun movement mechanism inside the vacuum chamber, and an electron gun A 100 installed upside down on the slide plate 17, and the electron beam outlet position of the electron gun A 100 is communicated through a flange assembly The beam guiding channel A 10 arranged horizontally, the output beam side of the electron gun A 100 is sequentially provided with a wire feeding mechanism 11 and a wire nozzle 13 from top to bottom, and the wire feeding mechanism 11 is used for the wire feeding The material 12 is fed from the wire nozzle 13 to the upper surface of the workpiece.

[0037] Specifically, in this embodiment, the electron gun A 100 includes a gun body 9, and a cathode 1, a grid 2, an anode 3 and a first focusing coil 4 a...

no. 2 example

[0054] see Image 6 , two electron guns A 100 and B 200 with the same structure are installed on the slide 17 upside down symmetrically with the metal wire 12 as the center.

[0055] Specifically, in this embodiment, the sliding plate 17 is installed on the electron gun moving mechanism inside the vacuum chamber, the electron gun A 100 and the beam guide channel A 10 are connected by flanges; the electron gun B 200 and the beam guide channel A 10 are connected by flanges; The lead channel B 20 is connected by a flange; the electron gun A 100 is connected to the external power supply A of the vacuum chamber through a high-voltage cable A 108; the electron gun B 200 is connected to the external power supply B of the vacuum chamber through a high-voltage cable B 208; the electron gun A 100 The gun body of the electron gun is connected with the water cooling system outside the vacuum chamber through the water inlet A 106 and the water outlet A 107; the gun body of the electron gun...

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Abstract

An electron gun device for fuse additive manufacturing, including a slide plate, and at least one electron gun installed upside down on the slide plate, the electron gun communicates with a beam guide channel arranged laterally through a flange assembly, and the electron gun outputs a beam current of The side is provided with a wire feeding mechanism and a wire guide from top to bottom; the electron gun includes a gun body, and the interior of the gun body is coaxially arranged with a cathode, a grid, an anode, a first focusing coil, and an insulator from bottom to top; The flow guide channel includes a casing, and a first deflection coil, a second focus coil and a second deflection coil are arranged in sequence in the casing. In the present invention, the electron gun installed in the vacuum chamber is turned upside down so that the beam outlet is facing away from the forming part, and the strong magnetic deflection system is used to deflect the electron beam to the metal wire at a large angle for fuse forming, avoiding the direct intrusion of metal vapor into the electron gun. Contaminate the cathode of the electron gun, increase the service life of the cathode, reduce discharge, and ensure the long-term stable operation of the electron gun.

Description

technical field [0001] The invention relates to the technical field of fuse additive manufacturing, in particular to an electron gun device for fuse additive manufacturing. Background technique [0002] Electron beam fuse additive manufacturing technology has the advantages of fast forming speed, controllable defects, and excellent mechanical properties. It is suitable for the manufacture of high-performance large-scale metal components, which can effectively shorten the production cycle and reduce manufacturing costs. At present, the size and length of electron beam fuse forming parts range from hundreds of millimeters to several meters, and the deposition efficiency reaches 1000cm 3 / h or more, the forming material includes stainless steel, titanium alloy, etc. The size of the formed parts is large and the deposition efficiency is high, which requires long-term stable operation of the fuse forming equipment, especially the electron beam source system that provides high-po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J29/48H01J29/70B22F3/105B33Y30/00
CPCH01J29/485H01J29/707B22F3/003B33Y30/00H01J2229/48H01J2229/703B22F10/00B22F12/90B22F12/44B22F12/49B22F10/25B22F12/00B22F12/20B22F12/41B22F12/53B22F12/45Y02P10/25
Inventor 许海鹰巩水利左从进桑兴华
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST