Electron Beam Welding Method of Tube and Tube Sheet in Titanium Alloy Heat Exchanger

A technology of electron beam welding and electron beam welding, which is applied in the direction of electron beam welding equipment, welding equipment, welding/welding/cutting items, etc., can solve problems such as inability to weld, achieve energy concentration, reliable welding, and improve overall performance.

Active Publication Date: 2018-10-26
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When welding a large number of small-pitch tubes and tube sheets, because the electron beam must always be inclined at a small angle with the tubes to be welded, when the tubes are moved and welded, the occlusion between adjacent tubes will lead to welding failure. become a problem for the industry

Method used

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  • Electron Beam Welding Method of Tube and Tube Sheet in Titanium Alloy Heat Exchanger
  • Electron Beam Welding Method of Tube and Tube Sheet in Titanium Alloy Heat Exchanger
  • Electron Beam Welding Method of Tube and Tube Sheet in Titanium Alloy Heat Exchanger

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Embodiment 1

[0029] In this embodiment, the material of the tube sheet 1 and the tube 2 in the heat exchanger is TA2, and there are 9 tubes 2 in total. The specifications and spacing of the tubes 2 are the same. The inner diameter D2=11mm, the pipe radius R refers to half of the outer diameter, that is, R=7.5mm, the distance between the pipes refers to the distance between the centers of the two pipes, and the minimum distance d between the centers of two adjacent pipes =20mm, then, the minimum distance k=d-2R=d-D1=5mm between the outer walls of two adjacent tubes, and the length of the tube protruding from the tube sheet is 500mm. In this embodiment, select L= , the specific welding process is:

[0030] (1) Clean the tube 2 and the tube sheet 1, and use acetone and alcohol solvents to ultrasonically clean them to remove oil stains;

[0031] (2) Assemble the tube 2 and the tube sheet 1, the assembly structure is as follows figure 2 As shown, ensure that the tube wall is perpendicular ...

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Abstract

The invention provides an electron beam welding method for a pipe and a pipe sheet in a titanium alloy heat exchanger, which comprises the following steps: under the conditions that the coordinates of the center of a circle of the pipe to be welded are (x1, y1) and the coordinates of the center of a circle of a rotating table are (x0, y0), firstly, moving an XY worktable so as to enable the center of an electron gun to be positioned at (x1+R+L, y1); then, adjusting the electron gun so as to enable the beam spot of the electron gun to move to the position (x1+R, y1); adjusting the XY worktable while the rotating table rotates at a uniform speed so as to enable the rotating table to move along an X track and an Y track, so that the center of the circle of the pipe to be welded is kept in the position (x1, y1) and the pipe to be welded rotates at a uniform speed; and welding the joint of the pipe to be welded, which rotates to the position (x1+R, y1), and the pipe sheet by the electron gun with a fixed emission position and a fixed direction, wherein welding of one pipe is finished after the pipe to be welded rotates for a circle. The method provided by the invention can realize reliable welding of large-batch small-interval pipes and pipe sheets.

Description

technical field [0001] The invention belongs to the field of metal material welding, in particular to an electron beam welding method for tubes and tube plates in a titanium alloy heat exchanger. Background technique [0002] Heat pipe heat exchangers have a series of advantages such as extremely high thermal conductivity, good isothermal properties, compact structure, and controllable temperature. They are currently widely used in metallurgy, chemical industry, oil refining, boilers, machinery and other industries, and have achieved significant economic benefits. It also has a very broad application prospect in the field of marine ships and submarines. In traditional heat exchangers, the tube and tube sheet structure is only a simple form of end sealing welding, such as automatic or manual TIG welding, which can meet the requirements. [0003] However, a new type of titanium alloy heat exchanger has a special connection structure between the tube and the tube sheet, such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K15/04B23K103/14
CPCB23K15/0006B23K15/04B23K2103/14
Inventor 刘希林耿永亮熊进辉王莹郭立栋
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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