Tool and processing method used for precise induction brazing of annular thin-walled part

A technology for induction brazing of thin-walled parts, applied in auxiliary devices, manufacturing tools, welding equipment, etc., can solve problems such as deformed structures, welding failures, scrapped parts, etc., and achieve the effects of small deformation, reliable quality, and low cost

Inactive Publication Date: 2016-06-08
FLIGHT AUTOMATIC CONTROL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the part has a thin-walled structure, the too fast heating rate at this time can easily cause the weak heat capacity area of ​​the base metal to heat up too quickly before the solder melts, resulting in large deformation and even structural burnout, resulting in scrapped parts and welding failures

Method used

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  • Tool and processing method used for precise induction brazing of annular thin-walled part

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Embodiment 1

[0022] When welding the feedback assembly of the jet pipe valve, the position of the feedback wire and the sleeve is required to be within 0.2mm. Pure asbestos cement tooling is used. The tooling accuracy is low and some positioning structures cannot be processed, and the technological requirements of the position of 0.2mm cannot be guaranteed; only Carbon steel metal tooling is used, the parts and tooling are easy to stick, and it is easy to be scrapped; the parts are directly placed in the coil for induction heating, and the thin-walled annular area is easy to be burned and scrapped due to the small heat capacity and fast heating speed.

[0023] Use this tool:

[0024] (1) The annular thin-walled part 6 to be welded is bonded to one side of the cement tooling 1, and the other side of the cement tooling 1 is bonded to the carbon steel tooling 2; the cement tooling 1 and the carbon steel tooling 2 are fixed by the connecting pin 3.

[0025] (2) Place the heat conducting rod 4 ...

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Abstract

The invention discloses a tool and processing method used for precise induction brazing of an annular thin-walled part and relates to the field of induction welding. The tool used for precise induction brazing of the annular thin-walled part comprises a combination tool body of asbestos cement and carbon steel and a heating rod. An asbestos cement tool body directly makes contact with the to-be-welded surface of the part without precision requirements, a carbon steel tool body directly makes contact with the non-welded portion of the part, and the positioning precision is ensured. The heating rod is placed in an induction coil, and one end of the heating rod makes contact with the part. After induction heating of the heating rod is conducted, heat is uniformly and gently input into the to-be-welded annular thin-walled part through heat conduction to complete welding. According to the tool and processing method used for precise induction brazing of the annular thin-walled part, reliable and high-frequency induction welding of the annular thin-walled part is achieved, the problem that a traditional nonmetal tool is low in positioning precision is solved, and the problem that the annular thin-walled part is prone to oversintering and partial fusing through high-frequency brazing is solved. The processing method is simple, low in cost, easy to achieve and capable of providing a new method for machining of other similar parts.

Description

Technical field: [0001] The invention belongs to welding technology and relates to the field of induction brazing. Background technique: [0002] Ceramics, graphite, asbestos cement, etc. are the first choice for making induction brazing positioning tools, which will not be heated by induction coils and are not easy to stick to parts. However, the machinability of the above materials is not good, some structures cannot be realized and the geometric accuracy is low, which cannot meet the induction brazing positioning requirements of some high-precision and complex structural parts. However, if a pure metal positioning tool is used, although the geometric positioning accuracy is high, the metal material tooling absorbs a lot of heat, which affects the temperature and thermal field of the part, and at the same time, the risk of adhesion between the part and the tooling is also great. [0003] Based on the principle of induction brazing eddy current effect and skin effect, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K3/08B23K1/002
Inventor 李海东韩宪军稽曦明
Owner FLIGHT AUTOMATIC CONTROL RES INST
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