Method used for shielding vacuum electron beam welding machine magnetic field

A vacuum electron beam welding and magnetic field technology, applied in electron beam welding equipment, magnetic field/electric field shielding, electrical components, etc., can solve problems such as inability to carry out, difficult demagnetization, etc., and achieve the effect of eliminating interference, significant effect, and obvious effect.

Inactive Publication Date: 2016-01-06
AECC AVIATION POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the magnetic induction intensity of some large parts or certain mechanical devices in the equipment is greater than the welding requirements, demagnetization becomes very difficult or impossible at all.

Method used

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  • Method used for shielding vacuum electron beam welding machine magnetic field
  • Method used for shielding vacuum electron beam welding machine magnetic field

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Embodiment Construction

[0018] The invention provides a method for shielding the magnetic field of a vacuum electron beam welding machine. When the magnetic induction intensity of some large parts or some mechanical devices in the equipment is greater than the welding requirement, demagnetization becomes very difficult or impossible. The method of the invention can be used on the path of the electron beam. Steps include:

[0019] (1) Measure the outer diameter of the focusing coil of the electron gun.

[0020] (2) Roll the foil-shaped stainless steel sheet into a cylindrical shielding cover, the inner diameter of the shielding cover is adapted to the outer diameter of the focusing coil, and the seams of the shielding cover are connected by energy storage spot welding. Shield structure see figure 1 and figure 2 .

[0021] Specifically, the thickness of the foil-shaped stainless steel sheet is 0.3-0.6 mm.

[0022] (3) Use clamps to fix the shield on the outer circumference of the focusing coil. ...

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Abstract

The invention belongs to the electron beam welding field and provides a method used for shielding a vacuum electron beam welding machine magnetic field. The method comprises steps that, (1) an outer diameter of a focusing coil of an electron gun is measured; (2), a foil-like stainless steel sheet is rolled to form a cylindrical shielding cover, an inner diameter of the shielding cover adapts to the outer diameter of the focusing coil, and seaming portions of the shielding cover are connected through energy storage spot welding; and (3), the shielding cover is fixed at periphery of the focusing coil by utilizing hoops. Through the method, interference of a magnetic field in a welding zone exerted on electron beam locus can be eliminated.

Description

technical field [0001] The invention belongs to electron beam welding, and in particular relates to a method for shielding the magnetic field of a vacuum electron beam welding machine. Background technique [0002] With its high energy density and excellent weld seam quality, electron beam welding technology is playing an increasingly important role in modern industry and has achieved good social benefits. Compared with other methods of fusion welding, electron beam welding has the following advantages: (1) high power density, small beam diameter, can form deep and narrow welds, weld depth-to-width ratio can reach 30:1, and the heat-affected zone is narrow , the deformation of the workpiece is small; (2) The highly focused electron beam can weld special refractory metals, metals with strong heat sensitivity and dissimilar metal materials that are difficult to weld in general fusion welding; (3) Electron beam welding parameters can be precisely controlled, and the welding par...

Claims

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Application Information

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IPC IPC(8): H05K9/00B23K15/06B23K37/00
Inventor 康文军韦瑾阮成勇杨磊王建涛陈涛
Owner AECC AVIATION POWER CO LTD
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