Method for eliminating brazing blockage of tube-seat ring-shaped workpiece of stainless steel sandwich structure

A sandwich structure and ring-shaped workpiece technology, applied in welding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of reducing product quality reliability, reducing product production efficiency, and increasing production costs, so as to improve product quality reliability, Guarantee the production progress and eliminate the effect of brazing blockage

Active Publication Date: 2021-08-06
XIAN SPACE ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Brazing blockage reduces product quality and reliability, reduces product production efficiency, and increases production costs

Method used

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  • Method for eliminating brazing blockage of tube-seat ring-shaped workpiece of stainless steel sandwich structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) The inner wall is a quasi-conical workpiece with rib grooves processed on the outer surface, the groove depth is 2mm; the outer wall is a quasi-conical workpiece formed by three-section tailor welding, and the wall thickness is 1mm; the diameter of the small end of the inner wall and the outer wall is 800mm , the diameter of the large end of the inner wall and the outer wall is 1200mm, and the axial height is 600mm. The inner wall material is 1Cr18Ni9Ti stainless steel, and the outer wall material is 1Cr21Ni5Ti stainless steel. Measure the axial distance L1 between the center of the big end ring groove on the inner wall and the end face of the big end, and record it; after the surface grinding of the outer surface of the inner wall and the inner surface of the outer wall Press the outer wall, measure the height difference L2 between the big end of the inner wall and the outer wall, and record it. After disassembly, check the area where the chalk powder on the inner...

Embodiment 2

[0041] (1) The inner wall is a quasi-conical workpiece with rib grooves processed on the outer surface, the groove depth is 2.5mm; the outer wall is a quasi-conical workpiece formed by three-section tailor welding, and the wall thickness is 2mm; the diameter of the small end of the inner wall and the outer wall is 900mm, the diameter of the large end of the inner wall and outer wall is 1300mm, and the axial height is 700mm. The inner wall material is 1Cr18Ni9Ti stainless steel, and the outer wall material is 1Cr21Ni5Ti stainless steel. Measure the axial distance L1 between the center of the big end ring groove on the inner wall and the end face of the big end, and record it; after the surface grinding of the outer surface of the inner wall and the inner surface of the outer wall Press the outer wall, measure the height difference L2 between the big end of the inner wall and the outer wall, and record it. After disassembly, check the area where the chalk powder on the inner su...

Embodiment 3

[0047](1) The inner wall is a quasi-conical workpiece with rib grooves processed on the outer surface, the groove depth is 2.2mm; the outer wall is a quasi-conical workpiece formed by three-section tailor welding, and the wall thickness is 1.5mm; the diameter of the small end of the inner wall and outer wall The diameter of the large end of the inner wall and the outer wall is 1250mm, and the axial height is 650mm. The inner wall material is 1Cr18Ni9Ti stainless steel, and the outer wall material is 1Cr21Ni5Ti stainless steel. Measure the axial distance L1 between the center of the big end ring groove on the inner wall and the end face of the big end, and record it; after the surface grinding of the outer surface of the inner wall and the inner surface of the outer wall Press the outer wall, measure the height difference L2 between the big end of the inner wall and the outer wall, and record it. After disassembly, check the area where the chalk powder on the inner surface of ...

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Abstract

The invention relates to a method for eliminating the brazing blockage of a tube-seat ring-shaped workpiece of a stainless steel sandwich structure. The method comprises the following steps: measuring and recording the axial distance L1 between the inner-wall large-end ring-shaped groove center and the large-end surface; marking out an outer-wall drilling position line on the outer-wall outer surface according to the axial size L1-L2 with the outer-wall large-end surface as a reference, and carrying out drilling with the position line as a reference; carrying out seal welding on the open end of a tube seat by the adoption of manual argon arc welding, and grinding the welded open end to be level; welding the tube seat to the outer-wall drilling part, and sawing the closed end of the tube seat so as to turn the tube seat into an open state; electroplating nickel on the outer-wall inner surface and the inner-wall outer surface, and and carrying out spot welding on the inner-wall rib surface by using a brazing material; pressing the inner and outer walls, and carrying out seal welding on the large and small ends through manual argon arc welding; and carrying out brazing on the inner and outer walls, and carrying out X-ray inspection. Through the method, the brazing blockage can be eliminated; the adoption of a mechanical method for blockage elimination as well as manual argon repair welding or repeated brazing can be avoided; the product production progress can be guaranteed; the production cost can be reduced; and the product quality reliability can be improved.

Description

technical field [0001] The invention relates to a method for eliminating brazing blockage of a stainless steel sandwich structure, in particular to a method for eliminating brazing blockage of an annular workpiece of a stainless steel sandwich structure with a pipe seat. Background technique [0002] In order to realize that after the product test run, the residual fuel in the stainless steel regenerative cooling sandwich structure can be unloaded smoothly. A pipe seat is welded on the outer wall corresponding to the large end annular groove of the inner wall of the large-scale sandwich structure annular workpiece, and is used for discharging fuel. The inner wall adopts the milling method to process the groove structure, and the outer wall is a tailor-welded structure of sheet metal parts and forgings. [0003] The existing method is: before brazing, directly weld the open end of the pipe seat to the drilled part of the large end of the outer wall; Inside the channel, X-ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23K1/00
CPCB23P15/00B23K1/0008
Inventor 王英杰张勤练王未有朱笑睿张文博李洪托张明波
Owner XIAN SPACE ENGINE CO LTD
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