CN102922121B - The vacuum electron beam welding method of brush seal ring assemblies - Google Patents
The vacuum electron beam welding method of brush seal ring assemblies Download PDFInfo
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- CN102922121B CN102922121B CN201210363573.1A CN201210363573A CN102922121B CN 102922121 B CN102922121 B CN 102922121B CN 201210363573 A CN201210363573 A CN 201210363573A CN 102922121 B CN102922121 B CN 102922121B
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Abstract
The vacuum electron beam welding method of brush seal ring assemblies, the welding point of brush seal ring assemblies requires: the width of welded part weld seam is each other between 4.0 ~ 4.5mm, and fusion penetration is between 3.2 ~ 3.8mm; Welding condition is: accelerating potential is 150kV, and focus current is 1928mA, and sweep waveform is triangular wave, and scan frequency is 200Hz, and scan amplitude is 2.5mm, and speed of welding is 10mm/s, and welding line is 2.0-4.0mA.One, by forming.This, change, improve.Can be applied to.Welding process of the present invention is stablized controlled, and welding parameter can accurate adjustment, welds reproducible; Joint defect is few, quality is high, and weld seam uniformity is good; Strength of joint is high, and the fusion of brush silk is abundant, and backboard bond strength is high; Welding process is simple, is applicable to batch production.
Description
Technical field
In prior art, brush seal ring assemblies commonly uses connection technique following two kinds:
1) argon arc welding connection technique due to argon arc welding thermal weld stress comparatively large, welding deformation is serious, and fuse the degree of depth more shallow, joint defect is more, and brush silk easily ruptures, and sealing effectiveness is poor, and assembly qualification rate is low simultaneously.
2) mechanical attachment technology ensures the closely fixing of brush silk by the special design structure of backboard, this technology is owing to requiring higher to the arrangement of brush silk, and Shua Si bearing needs wide-angle to bend simultaneously, easily ruptures, manufacturability is poor, present stage plant produced be difficult to meet small lot batch manufacture requirement.
People urgently wish the vacuum electron beam welding method obtaining the excellent brush seal ring assemblies of a kind of technique effect.
Background technology
People urgently wish the vacuum electron beam welding method obtaining the excellent brush seal ring assemblies of a kind of technique effect.
Summary of the invention
The object of this invention is to provide the vacuum electron beam welding method of the excellent brush seal ring assemblies of a kind of technique effect.
The invention provides a kind of vacuum electron beam welding method of brush seal ring assemblies, brush seal ring assemblies is arranged in the frock 1 of the Split type structure of auxiliary clamp, described brush seal ring assemblies and frock 1 is fixed together by screw 1; Brush seal ring assemblies is by brushing silk 4 and forming for the backboard 5 of stationary brush silk 4; Wherein: backboard 5 is relative with frock 1 fixing by screw 23, brush silk 4 fixed and arranged on backboard 5, as shown in Figure 1; It is characterized in that: the welding point of brush seal ring assemblies requires: the width of welded part weld seam is each other between 4.0 ~ 4.5mm, and fusion penetration is between 3.2 ~ 3.8mm; Welding point is smooth simultaneously, and brush silk is without the phenomenon of incomplete fusion, fracture;
Welding condition is: accelerating potential is 150kV, and focus current is 1928mA, and sweep waveform is triangular wave, and scan frequency is 200Hz, and scan amplitude is 2.5mm, and speed of welding is 10mm/s, and welding line is 2.0-4.0mA.
After the vacuum electron beam welding of brush seal ring assemblies, carry out the modification weldering operation of local, welding condition is: accelerating potential is 150kV, focus current is 1928mA, sweep waveform is triangular wave, and scan frequency is 200Hz, and scan amplitude is 2.5mm, speed of welding is 10mm/s, and welding line is 2.2mA.
The vacuum electron beam welding method of described brush seal ring assemblies also meets following requirement:
First Ultrasonic Cleaning is carried out to brush seal ring assemblies before welding, then dry: bake out temperature is 120 ± 5 DEG C, and the time is 0.5-1.5 hour;
Check it after carrying out vacuum electron beam welding to brush seal ring assemblies, inspection method is following two kinds of methods one or a combination set of: one visual examination: check face of weld quality; Its two, ultrasonic examination: check inner with or without following defect: pore, crackle.
Adopt the vacuum electron beam welding method of brush seal ring assemblies of the present invention, solve following technical problem:
1) because vacuum electron beam welding butt welded seam surface quality requirements is higher, butt welded seam is needed to clear up, to reduce the defect produced in welding process.Determine the welding procedure route of brush seal ring assemblies: Ultrasonic Cleaning before weldering---dries---electron-bombardment welding---postwelding inspection---vacuum heat;
2) structure due to brush seal ring assemblies is special, and the width of butt welded seam, the degree of depth have strict requirement, determines the vacuum electron beam welding technological parameter of brush seal ring assemblies;
3) because brush seal ring assemblies is strict to welding deformation requirements, while optimizing welding process parameter, devise the frock of vacuum electron beam welding and heat treatment one, welding deformation is accurately controlled;
4) brush seal ring assemblies structure is special, and welding point cannot adopt X-ray inspection, and have employed ultrasonic examination can the weld defect of effective detection tabs inside.
Important innovations point of the present invention is as follows:
1) in the welds prepares process of assembly: due to brush silk and backboard, between brush silk and brush silk arrangement closely, be difficult to by routine cleaning means, assembly be cleaned out.This technology, by the Ultrasonic Cleaning to assembly, decreases the impurity such as the greasy dirt in weld seam, oxide, dust, has cleaned and dried, ensure that the quality of welding point.
2) the vacuum electron beam welding technological parameter of brush seal ring assemblies: by the electron beam welding of repeatedly little heat input, ensure that width and the degree of depth of welding point, brush silk and backboard can fully be fused, decreases the distortion that welding produces simultaneously.
3) design of vacuum electron beam welding frock: by the design of electron beam welding tool, in the process of welding, keeps the pressure to backboard, after having welded, related welding tooling carries out vacuum heat together, while elimination welding stress, significantly reduces the distortion of welding and causing.
4) ultrasound examination of welding point: postwelding adopts ultrasound examination welding point, the main weld defect such as pore, crackle checking joint inside.
Technological merit of the present invention is as follows:
1) vacuum electron beam welding process stabilization is controlled, and welding parameter can accurate adjustment, welds reproducible;
2) weld under vacuum environment, joint defect is few, quality is high, and weld seam uniformity is good;
3) strength of joint is high, and the fusion of brush silk is abundant, and backboard bond strength is high;
4) welding process is simple, is applicable to batch production.
The present invention by brush silk and backboard close-coupled, can reach fixing requirement by vacuum electron beam welding, simultaneously because during welding, heat input is less, speed of welding is fast, welding process is stable, joint quality is high, the requirement that can meet design and produce.This technology in advance equipment investment is comparatively large, and early stage need do a large amount of soldering test determination welding condition, simultaneously higher to the assembling quality requirement of assembly.。
Adopt technical method of the present invention can complete the vacuum electron beam welding of brush seal ring assemblies, solve in conventional method and brush silk and backboard linking intensity is low, components welding is out of shape large problem, while guarantee joint quality, improve the structural strength of assembly, enhance the sealing effectiveness of assembly.
Accompanying drawing explanation
Below in conjunction with drawings and the embodiments, the present invention is further detailed explanation:
Fig. 1 is brush seal ring assemblies structure and welding tooling schematic diagram.
Detailed description of the invention
Embodiment 1
1) Ultrasonic Cleaning before weldering: before welding, adopts Ultrasonic Cleaning to brush seal ring assemblies, scavenging period 2 hours.
2) drying: after having cleaned, dry for 120 DEG C in drying oven, 1 hour time, drying remaining cleaning fluid in brush silk gap.
3) electron-bombardment welding: due to the special construction of brush silk, strictly will control fusion penetration and the cool time of electron beam welding in electron beam welding process.Welding penetration is excessive, cooling velocity is too fast, easily causes the fracture of brush silk, and face of weld easily produces and subsides simultaneously, unfavorable to follow-up processing.In electron beam welding process, adopt multiple welding, increase welding current gradually, control the process of each fusion penetration, extend the cool time of part, effectively can avoid the fracture of brushing silk in welding process.
Weld because front and back backboard spacing is larger, be generally 2.5 ~ 3.0mm, simultaneously because brush silk reason backboard spacing is uneven, the strict width controlling weld seam is required in welding process, prevent the phenomenon of brush silk incomplete fusion, therefore welding process should improve the scan amplitude of electron beam, suitably strengthens the width of weld seam.Vacuum electron beam welding technological parameter is in table 1.
Table 1 brush seal ring vacuum electron beam welding technological parameter
4) postwelding inspection
After the electron beam welding of brush seal ring completes, main employing visual examination and ultrasonic examination.Visual examination mainly checks face of weld quality, requires to meet relevant standard-required.Ultrasonic examination mainly checks the weld defect such as pore, crackle of weld seam inside.
5) vacuum heat
The part of postwelding passed examination together carries out vacuum heat together with welding tooling.
Embodiment 2
A vacuum electron beam welding method for brush seal ring assemblies, brush seal ring assemblies is arranged in the frock 1 of the Split type structure of auxiliary clamp, described brush seal ring assemblies and frock 1 is fixed together by screw 1; Brush seal ring assemblies is by brushing silk 4 and forming for the backboard 5 of stationary brush silk 4; Wherein: backboard 5 is relative with frock 1 fixing by screw 23, brush silk 4 fixed and arranged on backboard 5, as shown in Figure 1; The welding point of brush seal ring assemblies requires: the width of welded part weld seam is each other between 4.0 ~ 4.5mm, and fusion penetration is between 3.2 ~ 3.8mm; Welding point is smooth simultaneously, and brush silk is without the phenomenon of incomplete fusion, fracture;
Welding condition is: accelerating potential is 150kV, and focus current is 1928mA, and sweep waveform is triangular wave, and scan frequency is 200Hz, and scan amplitude is 2.5mm, and speed of welding is 10mm/s, and welding line is 2.0-4.0mA.
After the vacuum electron beam welding of brush seal ring assemblies, carry out the modification weldering operation of local, welding condition is: accelerating potential is 150kV, focus current is 1928mA, sweep waveform is triangular wave, and scan frequency is 200Hz, and scan amplitude is 2.5mm, speed of welding is 10mm/s, and welding line is 2.2mA.
The vacuum electron beam welding method of described brush seal ring assemblies also meets following requirement:
First Ultrasonic Cleaning is carried out to brush seal ring assemblies before welding, then dry: bake out temperature is 120 DEG C, and the time is 1 hour;
Check it after carrying out vacuum electron beam welding to brush seal ring assemblies, inspection method is following two kinds of methods one or a combination set of: one visual examination: check face of weld quality; Its two, ultrasonic examination: check inner with or without following defect: pore, crackle.
Adopt the vacuum electron beam welding method of described brush seal ring assemblies, solve following technical problem:
1) because vacuum electron beam welding butt welded seam surface quality requirements is higher, butt welded seam is needed to clear up, to reduce the defect produced in welding process.Determine the welding procedure route of brush seal ring assemblies: Ultrasonic Cleaning before weldering---dries---electron-bombardment welding---postwelding inspection---vacuum heat;
2) structure due to brush seal ring assemblies is special, and the width of butt welded seam, the degree of depth have strict requirement, determines the vacuum electron beam welding technological parameter of brush seal ring assemblies;
3) because brush seal ring assemblies is strict to welding deformation requirements, while optimizing welding process parameter, devise the frock of vacuum electron beam welding and heat treatment one, welding deformation is accurately controlled;
4) brush seal ring assemblies structure is special, and welding point cannot adopt X-ray inspection, and have employed ultrasonic examination can the weld defect of effective detection tabs inside.
The important innovations point of the present embodiment is as follows:
1) in the welds prepares process of assembly: due to brush silk and backboard, between brush silk and brush silk arrangement closely, be difficult to by routine cleaning means, assembly be cleaned out.This technology, by the Ultrasonic Cleaning to assembly, decreases the impurity such as the greasy dirt in weld seam, oxide, dust, has cleaned and dried, ensure that the quality of welding point.
2) the vacuum electron beam welding technological parameter of brush seal ring assemblies: by the electron beam welding of repeatedly little heat input, ensure that width and the degree of depth of welding point, brush silk and backboard can fully be fused, decreases the distortion that welding produces simultaneously.
3) design of vacuum electron beam welding frock: by the design of electron beam welding tool, in the process of welding, keeps the pressure to backboard, after having welded, related welding tooling carries out vacuum heat together, while elimination welding stress, significantly reduces the distortion of welding and causing.
4) ultrasound examination of welding point: postwelding adopts ultrasound examination welding point, the main weld defect such as pore, crackle checking joint inside.
The technological merit of the present embodiment is as follows:
1) vacuum electron beam welding process stabilization is controlled, and welding parameter can accurate adjustment, welds reproducible;
2) weld under vacuum environment, joint defect is few, quality is high, and weld seam uniformity is good;
3) strength of joint is high, and the fusion of brush silk is abundant, and backboard bond strength is high;
4) welding process is simple, is applicable to batch production.
The present embodiment by brush silk and backboard close-coupled, can reach fixing requirement by vacuum electron beam welding, simultaneously because during welding, heat input is less, speed of welding is fast, welding process is stable, joint quality is high, the requirement that can meet design and produce.This technology in advance equipment investment is comparatively large, and early stage need do a large amount of soldering test determination welding condition, simultaneously higher to the assembling quality requirement of assembly.。
Adopt technical method described in the present embodiment can complete the vacuum electron beam welding of brush seal ring assemblies, solve in conventional method and brush silk and backboard linking intensity is low, components welding is out of shape large problem, while guarantee joint quality, improve the structural strength of assembly, enhance the sealing effectiveness of assembly.
Claims (3)
1. the vacuum electron beam welding method of brush seal ring assemblies, brush seal ring assemblies is arranged in the frock (1) of the Split type structure of auxiliary clamp, described brush seal ring assemblies and frock (1) is fixed together by screw one (2); Brush seal ring assemblies is by brushing silk (4) and forming for the backboard (5) of stationary brush silk (4); Wherein: backboard (5) is relative fixing with frock (1) by screw two (3), brush silk (4) fixed and arranged is on backboard (5); It is characterized in that: the welding point of brush seal ring assemblies requires: the width of welded part weld seam is each other between 4.0 ~ 4.5mm, and fusion penetration is between 3.2 ~ 3.8mm;
Welding condition is: accelerating potential is 150kV, and focus current is 1928mA, and sweep waveform is triangular wave, and scan frequency is 200Hz, and scan amplitude is 2.5mm, and speed of welding is 10mm/s, and welding line is 2.0-4.0mA.
2. according to the vacuum electron beam welding method of brush seal ring assemblies described in claim 1, it is characterized in that: after the vacuum electron beam welding of brush seal ring assemblies, carry out the modification weldering operation of local, welding condition is: accelerating potential is 150kV, and focus current is 1928mA, and sweep waveform is triangular wave, scan frequency is 200Hz, scan amplitude is 2.5mm, and speed of welding is 10mm/s, and welding line is 2.2mA.
3. according to the vacuum electron beam welding method of brush seal ring assemblies described in claim 1 or 2, it is characterized in that: the vacuum electron beam welding method of described brush seal ring assemblies also meets following requirement:
First Ultrasonic Cleaning is carried out to brush seal ring assemblies before welding, then dry: bake out temperature is 120 ± 5 DEG C, and the time is 0.5-1.5 hour;
Check it after carrying out vacuum electron beam welding to brush seal ring assemblies, inspection method is following two kinds of methods one or a combination set of: one visual examination: check face of weld quality; Its two, ultrasonic examination: check inner with or without following defect: pore, crackle.
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| CN103358014B (en) * | 2013-07-31 | 2016-01-13 | 成都国光电气股份有限公司 | A kind of Terahertz TWT slow wave component vacuum electron beam welding technique |
| CN103551720B (en) * | 2013-11-18 | 2015-06-17 | 沈阳黎明航空发动机(集团)有限责任公司 | Electron beam deflection welding method for short pipe |
| CN103612006B (en) * | 2013-11-25 | 2016-05-18 | 北方材料科学与工程研究院有限公司 | Sun wing mechanism connecting rod vacuum electron beam welding method |
| CN104668763A (en) * | 2015-03-10 | 2015-06-03 | 江苏透平密封高科技股份有限公司 | Sealing brush copying type automatic welding device |
| CN105562885B (en) * | 2016-02-19 | 2017-11-10 | 江苏拓平密封科技有限公司 | Brush seal welding method based on cobalt powder joint filling and 3D printing technique |
| CN106513972A (en) * | 2016-11-23 | 2017-03-22 | 沈阳黎明航空发动机(集团)有限责任公司 | Vacuum electronic beam welding method of brush sealing ring assemblies |
| CN109352120A (en) * | 2018-11-27 | 2019-02-19 | 中国航发贵州黎阳航空动力有限公司 | One kind obturaging ring parts vacuum brazing clamp |
| CN109483037A (en) * | 2018-12-22 | 2019-03-19 | 山西汾西重工有限责任公司 | The one step welding method of aluminium alloy thick plate vacuum electron beam of gas hole defect can be overcome |
| CN112077428A (en) * | 2020-09-18 | 2020-12-15 | 中国航发沈阳黎明航空发动机有限责任公司 | Brush type sealing ring electron beam weld defect control method |
| CN114012231B (en) * | 2021-11-12 | 2023-06-06 | 沈阳航天新光集团有限公司 | Electron beam welding method of electric explosion valve |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |
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