Nickel brush-plating technology for diffuser of aero-engine
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A technology for aero-engines and diffusers, which is used in manufacturing tools, metal processing equipment, electrodes, etc., can solve problems such as poor brazing performance, low welding rate, and lack of welding, so as to meet the appearance of brazing and welding. rate requirements, the effect of improving wettability
Active Publication Date: 2021-10-22
CHINA HANGFA SOUTH IND CO LTD
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[0003] The invention provides a brush nickel-plating process for an aero-engine diffuser to solve the technical problems of a certain type of diffuser that is prone to low welding rate and non-welding due to poor brazing performance
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Embodiment 1
[0069] The specific process of brush nickel plating for aero-engine diffuser includes the following steps:
[0070] S1. Cleaning. Use acetone to clean the surface of the diffuser, so that the surface of the diffuser is free of oil and other foreign matter, and prevent foreign matter from being embedded in the base of the diffuser after sand blowing;
[0071] S2, protection, use protective tape to protect the non-brazed surface of the diffuser, so as to avoid damaging the surface state of other non-brazed surfaces;
[0072] S3. Sand blowing, using corundum sand with a particle size of 200 mesh, the sand blowing angle is 45°~90°, the compressed air pressure of sand blowing is less than or equal to 0.25MPa, until the surface to be brazed is gray and white, and there is no bright spot of metal reflection in the light inspection. After sanding, use clean compressed air to clean the sand particles on the surface of the parts;
[0073] S4. Brush-plate special nickel, prepare a plati...
Embodiment 2
[0082] The specific process of brush nickel plating for aero-engine diffuser includes the following steps:
[0083] S1. Cleaning. Use acetone to clean the surface of the diffuser, so that the surface of the diffuser is free of oil and other foreign matter, and prevent foreign matter from being embedded in the base of the diffuser after sand blowing;
[0084] S2, protection, use protective tape to protect the non-brazed surface of the diffuser, so as to avoid damaging the surface state of other non-brazed surfaces;
[0085] S3. Sand blowing, using corundum sand with a particle size of 220 mesh, the sand blowing angle is 45°~90°, the compressed air pressure of sand blowing is less than or equal to 0.25MPa, until the surface to be brazed is gray and white, and there is no bright spot of metal reflection in the light inspection, blow After sanding, use clean compressed air to clean the sand particles on the surface of the parts;
[0086] S4. Brush-plate special nickel, prepare a ...
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Abstract
The invention discloses a nickel brush-plating technology for a diffuser of an aero-engine. The technology comprises the following steps that cleaning is carried out, specifically, the diffuser is cleaned to enable the surface of the diffuser to be free of oil stains and foreign matter; protection is carried out, specifically, a non-brazing face of the diffuser is protected; sand blasting is carried out, specifically, sand blasting roughening is carried out on the to-be-brazed face till the to-be-brazed face is even in greyish white, and then the surface of the to-be-brazed face is cleaned; special nickel brush-plating of is carried out, specifically, special nickel brush-plating is carried out by adopting a plating pen; rapid nickel brush-plating is carried out, specifically, rapid nickel brush-plating is carried out by adopting the plating pen; and cleaning is carried out, specifically, a nickel-plated diffuser body and a nickel-plated outer cover are cleaned until a nickel layer is exposed. According to the nickel brush-plating technology for the diffuser of the aero-engine, the plating pen serves as an anode, the diffuser body and the outer cover serve as a cathode, special nickel liquid or rapid nickel liquid serves as electrolyte, electrolytic reaction is carried out after electrification, nickel moves towards the cathode in the electrolysis process and is finally attached to the brazed face of the diffuser body and the brazed face of the outer cover, and the nickel brush-plating process of the to-be-brazed face is completed.
Description
technical field [0001] The invention relates to the field of nickel plating, in particular to a brush nickel plating process for an aeroengine diffuser. Background technique [0002] A certain type of diffuser is composed of a body and an outer cover. There are 27 blades on the diffuser body, and 27 brazing surfaces are formed after being combined with the outer cover. It is necessary to carry out visual inspection and water ultrasonography inspection, and the following indicators need to be met: (1) cracks are not allowed on the brazing surface of the diffuser; (2) no defects are allowed within the 10mm area of the inlet edge; (3) brazing There shall be no penetrating defects on the welding surface, and the welding rate shall be higher than 75%. Due to the difficulty of processing a certain type of diffuser and the limitation of its own structure, it can only be fed by sticking solder on the blade, and the wettability of the solder is relatively poor. In addition, becau...
Claims
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Application Information
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