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A kind of brazing method of sealing seat assembly

A brazing method and sealing seat technology, which are used in welding media, welding equipment, welding/welding/cutting items, etc., can solve the problem that the assembly and positioning requirements of sealing seat components are also very high, the seat body is easily deformed, and the chemical composition Different problems, to achieve the effect of high production efficiency, high qualification rate of brazing, and ensuring sealing requirements

Active Publication Date: 2016-03-30
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the actual brazing process of the catheter and the seat body, there will be unavoidable technical problems, that is, the welding of titanium alloy and stainless steel dissimilar materials. Due to the large difference in physical and chemical properties between titanium alloy and stainless steel, especially the two The chemical composition of the pipe is completely different, and it is difficult to connect by the traditional welding method. Therefore, the brazing method must be used to connect the conduit and the seat body. However, the brazing method will involve the selection of brazing material, the setting of brazing process parameters and the brazing In many aspects, such as the sealing requirements of the solder joints, since the seat body is prone to deformation during the brazing process, the assembly and positioning requirements for the sealing seat components are also very high during the brazing process, so a set of practical brazing methods is urgently needed. Meet the production needs of sealing seat components

Method used

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  • A kind of brazing method of sealing seat assembly
  • A kind of brazing method of sealing seat assembly

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The seat body of the sealing seat assembly is TC4 titanium alloy, the conduit is 1Cr18Ni9Ti stainless steel, the conduit diameter is φ5mm, the depth of the two ends of the conduit inserted into the upper and lower mounting side holes of the seat body is 3mm, the upper and lower mounting edge holes of the seat body are The height difference is 120.5mm.

[0033] The type of vacuum furnace used in the brazing process is VBFV-300, the working temperature of the equipment is 550-1350°C, the temperature uniformity is ±5°C, and the ultimate vacuum pressure is 0.001Pa.

[0034] The brazing method of the above-mentioned sealing seat assembly includes the following steps:

[0035] Step 1: Preparation before welding

[0036] ① Prepare a BAg71CuNiLi strip-shaped finished solder with a thickness of 0.1mm, and then use emery gauze to clean the oxide film on the surface of the solder until it shows a metallic luster;

[0037] ② Use emery gauze to clean the oxide film at the two ends...

Embodiment 2

[0056] The seat body of the sealing seat assembly is TC4 titanium alloy, the conduit is 1Cr18Ni9Ti stainless steel, the conduit diameter is φ5mm, the depth of the two ends of the conduit inserted into the upper and lower mounting side holes of the seat body is 3.5mm, the upper and lower mounting sides of the seat body are The height difference is 120.8mm.

[0057] The type of vacuum furnace used in the brazing process is VBFV-300, the working temperature of the equipment is 550-1350°C, the temperature uniformity is ±5°C, and the ultimate vacuum pressure is 0.001Pa.

[0058] The brazing method of the above-mentioned sealing seat assembly includes the following steps:

[0059] Step 1: Preparation before welding

[0060] ① Prepare a BAg71CuNiLi strip-shaped finished solder with a thickness of 0.1mm, and then use emery gauze to clean the oxide film on the surface of the solder until it shows a metallic luster;

[0061] ② Use emery gauze to clean the oxide film at the two ends of...

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Abstract

The invention relates to a brazing method of a hermetically sealed seat component and belongs to the technical field of manufacture of aircraft engine parts. The hermetically sealed seat component comprises a seat body and a guide pipe, wherein the seat body is made of titanium alloy materials; the guide pipe is made of stainless steel materials. As the welding is hard to perform by adopting a traditional fusion welding method, and the selection of solders, the setting of brazing process parameters, the brazing position sealing requirements, the assembling and the positioning of the seat sealing component in the brazing process and other aspects can be involved when the brazing method is adopted, a set of feasible brazing method is urgently needed to meet the production demands of the hermetically sealed seat component. The brazing method has the benefits that the invention overcomes the technical problems encountered by the hermetically sealed seat component in the brazing process and provides the solder with good weldability; meanwhile, the brazing process parameters are provided, the sealing requirements after brazing at brazing positions are ensured, the positioning precision during brazing is high, and smooth and continuous brazing seams can be obtained; the brazing method has the characteristics of strong maneuverability, high production efficiency and high brazing pass rate.

Description

technical field [0001] The invention belongs to the technical field of manufacturing aero-engine components, in particular to a brazing method for a sealing seat assembly. Background technique [0002] As an important part of the aero-engine, the sealing seat assembly is composed of a seat body and a conduit, the seat body is made of titanium alloy, and the conduit is made of stainless steel. The sealing seat assembly is a welded component, one end of the conduit is inserted horizontally into the upper mounting side hole of the seat body, the conduit body extends and bends along the outer wall of the seat and the lower mounting edge, and the other end of the conduit is vertically inserted into the lower mounting side hole of the seat body , and the two ends of the conduit and the seat body must be connected as one by brazing. [0003] However, in the actual brazing process of the catheter and the seat body, there will be unavoidable technical problems, that is, the welding ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/00
CPCB23K1/008B23K1/19B23K1/20B23K1/206B23K35/0227B23K2103/04B23K2103/14
Inventor 孔庆吉杨涧石李文学杜静李晓光
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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