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Brazing filler metal presetting method for guide pipe brazing connection piece

A brazing material and preset technology, applied in welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problems of inability to guarantee assembly accuracy, low brazing qualification rate, and high brittleness of brazing material, so as to improve the brazing performance. Welding quality and pass rate, saving production, processing and blanking costs, and the effect of simple presetting

Inactive Publication Date: 2015-12-23
SHENYANG AIRCRAFT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because some solders cannot or are difficult to be made into foil strips; some solders are very brittle and cannot be bent into a ring; on the other hand, the solder foils are very thin, and will be twisted, deformed or even broken after cutting, which cannot be guaranteed. Assembly accuracy
The above presetting method of brazing material is difficult to realize, and the qualified rate of brazing is low

Method used

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  • Brazing filler metal presetting method for guide pipe brazing connection piece
  • Brazing filler metal presetting method for guide pipe brazing connection piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for presetting brazing filler metal for conduit brazing connections, comprising the following steps:

[0027] 1) Weigh the acrylic resin and acetone solvent with a balance, seal and stir according to the weight ratio of 1:2, and prepare the adhesive;

[0028] 2) Mix the solder powder and the binder according to the weight ratio of 1:0.3, adjust the viscosity with acetone solvent after mixing, and prepare the solder paste. The composition of the solder powder is Ti-Cu-Zr-Ni;

[0029] 3) Fill the casing with solder paste: clean the casing with a ring groove with acetone solvent, and dry it at room temperature for 1-2 minutes until the solvent is completely evaporated; wipe the casing again with a cotton cloth moistened with alcohol solvent; Fill the solder paste into the ring groove, and fill the ring groove; let the sleeve dry at room temperature for 10-20 minutes, until the solvent is completely evaporated, and remove the excess solder paste on the inner surfac...

Embodiment 2

[0034] A method for presetting brazing filler metal for conduit brazing connections, comprising the following steps:

[0035] 1) Weigh the acrylic resin and xylene solvent with a balance, seal and stir according to the weight ratio of 1:2.5, and prepare the adhesive;

[0036] 2) Mix the solder powder and the binder according to the weight ratio of 1:0.35, adjust the viscosity with xylene solvent after mixing, and prepare a solder paste. The composition of the solder powder is Ti-Cu-Zr-Ni;

[0037] 3) Fill the casing with solder paste: clean the casing with a ring groove with acetone solvent, and dry it at room temperature for 1-2 minutes until the solvent is completely evaporated; wipe the casing again with a cotton cloth moistened with alcohol solvent; Fill the solder paste into the ring groove, and fill the ring groove; let the sleeve dry at room temperature for 10-20 minutes, until the solvent is completely evaporated, and remove the excess solder paste on the inner surface...

Embodiment 3

[0042] A method for presetting brazing filler metal for conduit brazing connections, comprising the following steps:

[0043] 1) Weigh the acrylic resin and acetone solvent with a balance, seal and stir according to the weight ratio of 1:3, and prepare the adhesive;

[0044] 2) Mix the solder powder and the binder according to the weight ratio of 1:0.4, adjust the viscosity with acetone solvent after mixing, and prepare a solder paste. The composition of the solder powder is Ti-Cu-Zr-Ni;

[0045] 3) Fill the casing with solder paste: clean the casing with a ring groove with acetone solvent, and dry it at room temperature for 1-2 minutes until the solvent is completely evaporated; wipe the casing again with a cotton cloth moistened with alcohol solvent; Fill the solder paste into the ring groove, and fill the ring groove; let the sleeve dry at room temperature for 10-20 minutes, until the solvent is completely evaporated, and remove the excess solder paste on the inner surface ...

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PUM

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Abstract

The invention relates to a brazing filler metal presetting method for a guide pipe brazing connection piece. The brazing filler metal presetting method comprises the following steps: (1) brazing filler metal powder and adhesive are mixed according to parts by weight of 1:0.3-0.5, and the viscosity is adjusted by a solvent after mixing to prepare brazing filler metal paste; (2) a sleeve is filled with the brazing filler metal paste; (3) brazing filler metal is sintered; (4) the sintering quality of the brazing filler metal is checked visually; and (5) when brazing is prepared, the sleeve provided with the sintering brazing filler metal and two to-be-connected guide pipe end sockets are assembled together to complete presetting. According to the method, a layer of brazing filler metal is preset into the guide pipe brazing connection piece; the operation is accurate, economic, feasible and efficient, so that the uniformity of spreading and flowing of the brazing filler metal in the guide pipe brazing process can be ensured; a qualified brazing seam meeting the technical requirement can be obtained; and the difficulties in the prior art can be effectively solved.

Description

technical field [0001] The invention relates to a method for presetting brazing material of a conduit brazing connector, which is used for induction brazing connection of conduits. Background technique [0002] Various piping systems in aircraft and aero-engines are criss-crossed and play an important role in transmitting hydraulic pressure, fuel oil, and gas. Realizing the reliable connection of pipeline joints is the key to ensure the normal function of the system. For some of these pipe joints, induction brazing techniques can be used to achieve a permanent connection. [0003] A key element affecting the quality of induction brazing is the presetting of the solder. Depending on the construction of the brazed connection (sleeve), it is necessary to pre-set the solder in the grooves in the sleeve. Solder is generally supplied in the form of cast rods, wires, powders, pastes, foils, tapes and pellets. For the above-mentioned sleeve structure, the traditional solder pres...

Claims

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Application Information

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IPC IPC(8): B23K1/008B23K35/40B23K101/06
CPCB23K1/008B23K35/025B23K35/40
Inventor 王志敏
Owner SHENYANG AIRCRAFT CORP