Method of Vacuum Electron Beam Welding of Chromium Bronze Butt Joints of Annular Workpieces with Sandwich Structure

A vacuum electron beam, butt joint technology, applied in electron beam welding equipment, welding equipment, welding equipment and other directions, can solve the problems of reducing production efficiency, reducing the bearing capacity of the welding seam, increasing the production cost, etc., to improve the effective thickness and The effect of bearing capacity, reducing the number of rework and welding, and reducing production costs

Active Publication Date: 2021-10-15
XIAN SPACE ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The back of the direct electron beam welding of the chromium bronze butt joint of the circular workpiece is prone to depression, which reduces the effective wall thickness of the weld and reduces the bearing capacity of the weld
At the same time, the X-ray inspection of chrome bronze electron beam welds is prone to produce pores, which can easily exceed the requirements of electron beam welding standards, resulting in the frequent need for electron beam repair welding to ensure that the internal quality of the weld is qualified
Rework welding reduces production efficiency and increases production costs

Method used

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  • Method of Vacuum Electron Beam Welding of Chromium Bronze Butt Joints of Annular Workpieces with Sandwich Structure
  • Method of Vacuum Electron Beam Welding of Chromium Bronze Butt Joints of Annular Workpieces with Sandwich Structure
  • Method of Vacuum Electron Beam Welding of Chromium Bronze Butt Joints of Annular Workpieces with Sandwich Structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) The outer walls of the A workpiece and the B workter are brazed and soldered, respectively, the inner wall is a sandwich structure annular structure of chrome bronze. The walls of the a workpiece and the B-workpiece have a wall thickness of 1.2 mm, and the grades are qcr0.8, and the weld diameter is φ260mm. The surface of the A workpiece and the B-workpiece chrome bronze bobbin on the blade are cleaned, and the metal gloss is exposed, welding in 24 hours.

[0054] (2) Positioning the positioning sheet in the outer wall by manual argon arc welding, and the spacing between adjacent positioning sheets is 180 mm. The displacement of the chrome bronze on the back surface of the chrome bronze on the A workpiece and B workpiece is 0.1 mm, and the gap is 0.1 mm. The copper pad material of the weld back surface is consistent with the inner wall of the workpiece, the width is 12mm, each layer has a thickness of 1 mm, and after the two-layer copper pad is placed, it is connected w...

Embodiment 2

[0059] (1) The outer walls of the A workpiece and the B workter are brazed and soldered, respectively, the inner wall is a sandwich structure annular structure of chrome bronze. The walls of the a workpiece and the B-workpiece have a wall thickness of 2 mm, and the grade is qcr0.8, and the weld is φ120 mm. The surface of the A workpiece and the B-workpiece chrome bronze bobbin on the blade are cleaned, and the metal gloss is exposed, welding in 24 hours.

[0060] (2) Positioning the positioning sheet in the outer wall in the outer wall to position the A workpiece and the B workpiece, the spacing between adjacent positioning sheets is 150 mm. The dislocation of the back surface of the chrome bronze on the back surface of the a workpiece and the B-workpiece is 0.05 mm, and the gap is 0.05 mm. The copper pad material of the weld back surface is consistent with the inner wall of the workpiece, the width is 10mm, each layer has a thickness of 1 mm, and the two-layer copper pad is place...

Embodiment 3

[0065] (1) The outer walls of the A workpiece and the B workter are brazed and soldered, respectively, the inner wall is a sandwich structure annular structure of chrome bronze. The walls of the a workpiece and the B-workpiece have a wall thickness of 3 mm, the grade of the material is qcr0.8, and the weld is diameter is φ800mm. The surface of the A workpiece and the B-workpiece chrome bronze bobbin on the blade are cleaned, and the metal gloss is exposed, welding in 24 hours.

[0066](2) Positioning the positioning sheet in the outer wall by manual argon arc welding, the spacing of the adjacent positioning sheet is 200 mm. The displacement of the chrome bronze on the back surface of the chrome bronze on the A workpiece and B workpiece is 0.1 mm, and the gap is 0.1 mm. The copper pad material of the weld back surface is consistent with the inner wall of the workpiece. The width is 14mm, each layer has a thickness of 1 mm, and the two-layer copper pad is overlapped, and the manual ...

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Abstract

The vacuum electron beam welding method for the chromium bronze butt joint of the sandwich structure circular workpiece is to use the first clamping tool to clamp the workpiece, so that the copper backing plate is closely attached to the back of the weld seam of the workpiece, and after the electron beam segmental positioning welding, the workpiece and The first clamping tool is disassembled, and the copper backing plate on the back of the weld is corrected so that the back of the weld and the copper backing plate are closely attached. Use the second clamping tool to clamp the workpiece for formal welding. The second clamping tool allows the chrome bronze butt weld and copper backing plate of the workpiece to be welded through. After welding, the copper backing plate on the back of the workpiece weld is removed by manual grinding. . The invention solves the easy-to-produce depression on the back of the chrome bronze electron beam weld, and at the same time significantly reduces the probability of air holes inside the chrome bronze electron beam weld, so that the first pass rate of the X-ray inspection of the workpiece is significantly improved, and the number of rework welding of the workpiece is reduced , reducing production costs.

Description

Technical field [0001] The present invention relates to a method of chromium bronze vacuum electron beam welding, and more particularly to a method of laminated a vacuum electron beam welding of a sandwich joint vacuum electron beam welding, belonging to the field of machining. Background technique [0002] The back surface of the weld joint of the annular workpiece chrome bronze docking joint is easily depressed, so that the weld portion has an effective wall thickness and reduces the load capacity of the weld site. At the same time, chrome bronze electron beam weld X-ray examination is easy to generate pores, which is easy to exceed electron beam welding standards, resulting in the need for electron beam renovation, in order to ensure that the internal quality of the weld is qualified. Repair welding reduces production efficiency and improves production costs. Inventive content [0003] The technical solution of the present invention is to overcome the shortcomings of the prio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K15/04B23K37/00B23K37/04B23K103/12
CPCB23K15/04B23K37/00B23K37/0435B23K2103/12
Inventor 杨卫鹏薄佑锋王英杰
Owner XIAN SPACE ENGINE CO LTD
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