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Welding method of aero-engine high-energy ignition device

An aero-engine, high-energy ignition technology, applied in welding equipment, liquid chemical plating, coating, etc., to achieve the effects of easy operation, guaranteed work reliability, and guaranteed shielding

Inactive Publication Date: 2018-03-09
哈尔滨东安高精管轴制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a welding method for a high-energy ignition device of an aero-engine, which solves the difficulty of aluminum alloy tin brazing, ensures the sealing and welding quality of the aluminum alloy shell and cover, and protects the ignition coil from heat damage during the welding process. And achieve the purpose of electromagnetic shielding of high energy ignition device

Method used

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Examples

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Embodiment 1

[0041] An aircraft high-energy ignition device, the product model is DHZ-119, the specific steps of welding are as follows:

[0042] 1) Electroless nickel plating is performed on the surface of all aluminum alloy parts that require tin brazing, and the surface electroless nickel plating is carried out according to the following steps:

[0043] a) Cleaning: Soak the parts in No. 180 gasoline for 10 minutes, take them out, clean them with a clean soft brush and dry them naturally;

[0044] b) Chemical degreasing: Soak the parts in a solution of 10 g / L, 18 g / L sodium phosphate, 31 g / L sodium silicate, 24 g / L sodium carbonate, and the rest of water for 3 minutes. The temperature is 70°C;

[0045] c) Alkali etching: Put the parts into a solution whose composition is 60 g / l of sodium hydroxide and the rest is water for 0.8 minutes, and the immersion temperature is 60°C;

[0046] d) Acid etching: put the parts into a solution whose composition is 500 ml / liter of nitric acid and the r...

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Abstract

The invention relates to a welding method for a high-energy ignition device of an aero-engine. Chemical nickel-plating is conducted on the surface of an aluminium alloy part, wetting and combining of brazing filler metal and base metal are guaranteed, and it is guaranteed that welding can be conducted effectively. Multiple kinds of welding modes are combined, so that the difficult problems that operation space is small, and welding can not be conducted are solved, the shielding performance of the high-energy ignition device is guaranteed, welding deformation of aluminium alloy thin sheets is effectively controlled, operation can be conducted in narrow space conveniently, and it is guaranteed that a high-energy ignition coil is not burnt in the welding process. The difficult problem of aluminium tin soldering and brazing is well solved, and the special requirement for electromagnetic shielding of the high-energy ignition device can be met.

Description

technical field [0001] The invention relates to a welding method, in particular to a welding method for a high-energy ignition device of an aero-engine. Background technique [0002] Since the founding of the People's Republic of China, my country's aero-engine ignition devices have been developed in imitation of the prototypes of the former Soviet Union, and the platinum contact point ignition method is adopted. The shell and cover of the entire device are made of aluminum alloy casting, with a thickness of about 3-5mm. , the weight is not more than 3.35Kg, and the overall dimensions are 246mm×184mm×126mm. The housing and lugs are riveted, the final assembly of the housing and the cover is bolted, and some of the connections between the entire device and the aero-engine are argon arc welding. Platinum contacts will be burned every time they are ignited. After more ignition times, the platinum contacts will become thinner, and the gap between the upper and lower contact poin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/008B23K1/20C23C18/32
CPCB23K1/008B23K1/20C23C18/32
Inventor 刘文波郭泽麟贾云兰辛旭生田鹏刘江涛
Owner 哈尔滨东安高精管轴制造有限公司
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