Vacuum brazing method for slender weld joint of hole-shaft matched part

A technology of hole-shaft matching and brazing method, which is applied in welding equipment, metal processing equipment, manufacturing tools, etc. Easy to assemble and easy to operate

Active Publication Date: 2021-04-09
西安成立航空制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After welding, cut and check that there are many unwelded areas of solder in 5 and 4 places, which do not meet the welding seam requirements

Method used

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  • Vacuum brazing method for slender weld joint of hole-shaft matched part

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Embodiment Construction

[0036] A preferred embodiment of the present invention will be described below in conjunction with the accompanying drawings, and the technical solution in a preferred embodiment of the present invention will be clearly and completely described.

[0037] figure 1 It is a schematic diagram of the assembly of the hole-shaped part 1 and the shaft-shaped part 2. The shaft-shaped part 2 includes a large-diameter part 3, a small-diameter part 5 and a conical part 4 connecting the two. There is a welding gap of 0.05-0.1 cm on one side, and the front end of the small diameter part 5 has a clamping part 6 that can be tightly matched with the hole type part 1. The vacuum brazing method of the above-mentioned hole and shaft matching part slender welding seam includes the following steps,

[0038] 1. Check parts:

[0039] (1) Spare parts: get the hole type part 1 and the shaft type part 2, nickel-based alloy powder solder, adhesive, nickel foil with a thickness of 0.05cm; in the present ...

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PUM

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Abstract

The invention discloses a vacuum brazing method for a slender weld joint of a hole-shaft matched part. The method comprises the following steps of assembling the part, and spraying brazing filler metal, specifically, spot-welding a sheared nickel sheet to a conical surface part of a shaft-shaped part, and uniformly distributing the nickel sheet at 3-5 parts along the circumferential direction of the conical surface part; assembling, specifically, putting the shaft-shaped part in a hole-shaped part and assembling to the bottom, and enabling a clamping part to be in close fit with the inner wall of the hole-shaped part; coating and injecting the brazing filler metal, specifically, uniformly coating and injecting the prepared paste brazing filler metal on the edge of a gap formed by the shaft-shaped part and the hole-shaped part for a circle by using an injector; drying, specifically, cleaning the part, putting the part into a drying oven at (80+/-10) DEG C, and keeping the temperature for (40+/-10) minutes; and conducting brazing in a furnace. According to the vacuum brazing method, the front end of the hole-shaft matched part is in close fit, and the nickel sheets with the same thickness are uniformly distributed on the conical surface along the circumference for spot welding, so that the welding clearance is doubly ensured, the conical surface is prevented from being stuck in the assembling process, and the brazing quality of the slender weld joint is better ensured; and the process is easy to operate, parts are easy to assemble, and part assembly is not affected after the nickel sheets are preset on the conical surface.

Description

technical field [0001] The invention belongs to the technical field of vacuum brazing, in particular to a vacuum brazing method for a slender welding seam of a hole-shaft matching part. Background technique [0002] Vacuum brazing is a welding method in which the solder spreads and diffuses to the base metal to form a welded joint with a certain strength under its own fluidity and capillary action in a vacuum state. Since it is carried out under vacuum conditions, it will not Oxidation, decarburization, carburization, pollution, deterioration and other phenomena occur in parts without adding flux. However, the input cost and maintenance cost of this technology are relatively high, so it is generally used in aviation and aerospace industries. [0003] In general, for hole-shaft fittings, the matching tolerance of the machined parts is mainly controlled to control the welding gap after assembly. Sometimes tooling positioning, burr positioning, direct spot welding positioning ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/00
CPCB23K1/00
Inventor 杨冰彭建科苏展屈乐
Owner 西安成立航空制造有限公司
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