CN103045987B - For there being the narrow deep trouth profile heat spraying method in multiple spraying area face - Google Patents
For there being the narrow deep trouth profile heat spraying method in multiple spraying area face Download PDFInfo
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Abstract
The invention discloses a kind of for there being the narrow deep trouth profile heat spraying method of multiple spraying area, its main contents comprise: according to the different spraying area profile of the narrow deep trouth of simulation, determine the spray gun spraying walking path that different spraying area profile is corresponding, to ensure that each spraying area can spray with maximum spray angle, ensure coating quality and sedimentation effect; According to narrow deep trouth different spraying area profile coating thickness requirement, determine the walking parameter of the spray gun spraying walking path spraying different spraying area profile, to control coat-thickness; Spray gun is difficult to the channel profile switching transitional region be sprayed directly into, flows through by spraying flame stream is injected into spraying flame the profile that bounce-back can be sprayed at this transitional region, utilize flame stream to rebound and this switching transitional region profile is sprayed.Adopt method of the present invention to spray narrow deep trouth profile, each spraying area coat-thickness controls stable, and coating quality is good, and repeatability is high.<!--1-->
Description
Technical field
The present invention relates to hot spray coating processing technique field, particularly include the narrow and dark again structure grooves profile spraying method in multiple spraying area face.
Background technology
Along with the development of aero engine technology, in order to meet the requirement of overall engine performance, more and more higher to the performance requriements of its component, therefore the design of engine component is constantly weeded out the old and bring forth the new, and structure is more complicated, and performance is continued to optimize.Because stuctures and properties needs, some parts with narrow V-type or U-shaped structure grooves of aircraft engine need hot spray coating, to improve, component are wear-resisting, corrosion resistance nature etc., and improve its performance by the coat-thickness or metallographic structure controlling each spraying area, meet assembling and service requirements.
At aircraft engine manufacture field, the utilization of hot-spraying techniques in aircraft engine gets more and more, but at traditional aerial motor spare part manufacture field, generally need the part of thermal spray process, its spraying area only has 1-2 spray-coating surface, and the structure of spraying area is relatively simple, is easy to spray process, automatic coating machine is only needed to work out simple mechanical manipulator walking program, or by operating personnel's pistol up and down or move left and right and can implement spraying.But for having the narrow of more than 3 or 3 spraying areas and deep structure groove again, large and the V-type that width is little or U-shaped structure grooves as dark/wide ratio, the spraying coating process mode of prior art routine is adopted to be difficult to spray the region having covered the spraying of all needs, as the bottom land of U-shaped structure grooves and cell wall are transferred transitional region, let alone the coat-thickness in each region is controlled.Therefore, aircraft engine production practice are badly in need of providing a kind of method can carrying out spray process to the narrow deep structure channel profile with multiple spraying area, to meet the aero engine technology development requirement more and more higher to its component performance.
Summary of the invention
For the state of the art of the aerial motor spare part thermal spray process of prior art, object of the present invention aims to provide a kind of for there being the narrow deep trouth profile heat spraying method in multiple spraying area face, effectively control each spraying area coat-thickness and coating metallographic structure to reach, meet aero engine technology development to its component performance requirement.
Provided by the invention for there being the narrow deep structure channel profile spraying method in multiple spraying area face, its main contents comprise:
(1) according to the different spraying area profile of the narrow deep structure groove of simulation, determine the spray gun spraying walking path of corresponding different spraying area profile, to ensure that each spraying area can spray with maximum spray angle, ensure coating quality and sedimentation effect;
(2) according to narrow deep structure groove different spraying area profile coating thickness requirement, the walking parameter of the spray gun spraying walking path spraying different spraying area profile is determined, to control coat-thickness;
(3) spray gun is difficult to the structure grooves profile switching transitional region be sprayed directly into, spraying flame stream is injected into spraying flame and flows through the profile that bounce-back can be sprayed at this transitional region, utilize flame stream to rebound and this switching transitional region profile is sprayed.
In technique scheme, the injection angle between spraying flame stream injection direction and spraying area profile is preferably not less than 45 °, to ensure quality and the sedimentation effect of coating.
In technique scheme, the connection that the spray gun spraying adjacent different spraying area profile is walked between subpath is preferably round and smooth connection.
Provided by the invention for there being the narrow deep structure channel profile spraying method in multiple spraying area face, be a kind of new spraying coating process method that contriver has been developed by repetition test and improvement, method of the present invention has following characteristics:
1, spraying area profile profiling spraying is simulated.In hot-spraying techniques method of the present invention, the path of spray gun spraying walking is not simple translational motion, but the round and smooth action of spraying area profile of simulation part, to ensure that each region can spray with maximum spray angle, ensure coating quality and sedimentation effect.
2, segmentation adopts different spray parameters.Need the narrow deep structure groove of spray process to have multiple spray-coating surface, and each spray-coating surface may have specific coating thickness requirement.The path of spray gun spraying walking is formed by connecting by sectional subpath is round and smooth, and for the thickness requirement of each spray-coating surface, each subpath sets corresponding spray gun walking parameter, to control coat-thickness.
3, spraying flame stream bounce-back spraying is utilized.Spraying flame stream is ejected into structure grooves spray-coating surface, and the bounce-back of spraying flame stream cannot be avoided.For narrow and spraying that is deep structure channel profile, bottom land and cell wall are transferred transitional region, and be difficult to be sprayed directly into this region owing to covering spraying flame stream, namely allow to coating, coat-thickness is also difficult to reach requirement.The present invention, according to principle of reflection, utilizes the inevitably spraying flame stream bounce-back region reached direct spraying can not spray to spray, realizes spraying all spraying areas of narrow deep structure groove.
Processing method of the present invention is adopted to carry out thermospray to the narrow deep structure channel profile with multiple spray-coating surface, intactly can apply V-type groove or all spray-coating surfaces of U-type groove, the coat-thickness of each spraying area can be controlled in target thickness 0.10mm, through production actual verification, each spraying area coat-thickness controls stable, coating quality is good, repeatability is high, achieve the coat-thickness and coating metallographic structure that effectively control each spraying area, improved by thermospray that aerial motor spare part is wear-resistant, the object of corrosion resistance nature.
Accompanying drawing explanation
Accompanying drawing 1 is the cross-section structure of the narrow deep structure groove on aircraft engine aft-fan casing.
Accompanying drawing 2 adopts narrow deep structure channel profile spray gun spraying walking path piecewise graph described in the inventive method thermospray accompanying drawing 1.
Accompanying drawing 3 adopts the inventive method according to the process route chart of each spraying area of narrow deep structure groove in the spraying walking path segmentation thermospray accompanying drawing 1 of accompanying drawing 2.
Accompanying drawing 4 is the schematic diagram utilizing narrow deep trouth transition region described in bounce-back thermospray accompanying drawing 1.
Embodiment
Be specifically described, so that personnel's the understanding of the present invention of art to conjunction embodiment below to the present invention.Be necessary at this it is emphasized that; embodiment is just for the present invention will be further described; limiting the scope of the invention can not be interpreted as; affiliated art skilled person; according to improvement and adjustment that the invention described above content makes non-intrinsically safe to the present invention, still protection scope of the present invention should be belonged to.
Embodiment 1
The narrow deep trouth of the present embodiment thermal spray process is the structure grooves on aircraft engine aft-fan casing, the shape and structure size of groove as shown in Figure 1, groove depth is about 18mm, slot bottom width is about 7mm, depth-to-width ratio is 2.57, the all channel profile of this structure grooves carries out thermospray, bottom is nickel aluminum coating, wherein the coat-thickness of cell wall A-B flat segments is 0.14 ± 0.06mm, the switching zone of transition B-B1 coat-thickness of cell wall A-B and bottom land B1-C is 0.16 ± 0.09mm, the switching zone of transition C-C1 coat-thickness of bottom land B1-C and bottom land B1-C and cell wall C1-D flat segments is 0.29 ± 0.22mm, cell wall C1-D flat segments coat-thickness is 0.14 ± 0.06mm.Surface layer is copper nickel phosphide material coating, wherein the coat-thickness of cell wall A-B flat segments is 0.15 ± 0.07mm, the switching zone of transition B-B1 coat-thickness of cell wall A-B and bottom land B1-C is 0.19 ± 0.11mm, the switching zone of transition C-C1 coat-thickness of bottom land B1-C and bottom land B1-C and cell wall C1-D flat segments is 0.29 ± 0.22mm, and the coat-thickness of cell wall C1-D flat segments is 0.15 ± 0.07mm.Spraying coating process as shown in Figure 3, first according to the spray gun translational speed 1 that A-B section coat-thickness calculates, along B point, structure grooves A-B flat segments trough wall surface is sprayed under moving laterally to cell wall by A point, round and smooth rotation spray gun spraying direction after spray gun spraying to B point, again according to the spray gun translational speed 2 that B1-C section coat-thickness calculates, vertically move to C point by B1 point to spray structure grooves B1-C flat segments groove bottom, round and smooth rotation spray gun spraying direction after spray gun spraying to C point, again according to the spray gun translational speed 3 that C1-D flat segments coat-thickness calculates, cell wall outer D point is moved laterally to along C1 point by under this side channel wall, structure grooves C1-D flat segments trough wall surface is sprayed.Wherein the switching zone of transition B-B1 of cell wall A-B and bottom land B1-C and bottom land B1-C and cell wall C1-D transfers zone of transition C-C1, adopts bounce-back spraying method as shown in Figure 4 to spray.After primer coat material spraying terminates solidification, repeat primer coat material spraying process, spraying surface coated material.Injection angle between spraying process spraying flame stream injection direction and spraying area profile controls to be not less than 45 °.
Structure grooves on aft-fan casing not only meets the requirement of aerial motor spare part metallographic after adopting spraying method of the present invention to spray, and thickness also meets the different requirement in each region.
Claims (1)
1. one kind for there being the narrow deep trouth profile heat spraying method in multiple spraying area face, it is characterized in that: spray from cell wall outer, the side A point of narrow deep trouth, according to the spray gun translational speed 1 that this side channel wall A-B flat segments coat-thickness calculates, along B point, this side channel wall A-B flat segments trough wall surface is sprayed under moving laterally to cell wall by A point, round and smooth rotation spray gun spraying direction after spray gun spraying to B point, again according to the spray gun translational speed 2 that bottom land B1-C flat segments coat-thickness calculates, vertically move to bottom land C point by bottom land B1 point to spray B1-C flat segments groove bottom, round and smooth rotation spray gun spraying direction after spray gun spraying to C point, again according to the spray gun translational speed 3 that opposite side cell wall C1-D flat segments coat-thickness calculates, cell wall outer D point is moved laterally to along C1 point by under this side channel wall, the C1-D flat segments trough wall surface of this side channel wall is sprayed, the spraying of each flat segments spraying area, injection angle between spraying flame stream injection direction and spraying area profile is not less than 45 °, two zone of transition B-B1 and C-C1 that transfer of bottom land and both sides cell wall, bounce-back spraying method is adopted to spray.
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CN107142443B (en) * | 2017-05-12 | 2019-06-04 | 中国航发北京航空材料研究院 | A method of blocking groove shape part bottom surface Velocity Oxygen Flame Sprayed Coatings |
CN109266994A (en) * | 2018-11-27 | 2019-01-25 | 广东省新材料研究所 | A kind of preparation method of the outer surface supersonic spray coating coating of complex parts |
CN109536868A (en) * | 2018-11-27 | 2019-03-29 | 广东省新材料研究所 | The method of the inner hole supersonic flame spraying metal-cermic coating of oil transportation flow splitter |
CN112403746A (en) * | 2019-08-21 | 2021-02-26 | 成都飞机工业(集团)有限责任公司 | Spraying process method of multi-frame groove part |
CN114713468A (en) * | 2022-03-03 | 2022-07-08 | 柳州五菱汽车工业有限公司 | Technological method for spraying pearlescent paint on bumper |
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EP1350862A1 (en) * | 2002-04-04 | 2003-10-08 | Sulzer Metco AG | Process and apparatus for thermally coating a surface |
EP2145974A1 (en) * | 2008-07-16 | 2010-01-20 | Siemens Aktiengesellschaft | Method for high speed flame spraying |
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