CN103586560B - The repair method of crackle at a kind of combustion box mounting bracket - Google Patents
The repair method of crackle at a kind of combustion box mounting bracket Download PDFInfo
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- CN103586560B CN103586560B CN201310560944.XA CN201310560944A CN103586560B CN 103586560 B CN103586560 B CN 103586560B CN 201310560944 A CN201310560944 A CN 201310560944A CN 103586560 B CN103586560 B CN 103586560B
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- welding
- argon
- weld
- crackle
- mounting bracket
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/206—Cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention relates to a kind of repair method of crackle at combustion box mounting bracket, this method passes through while electric arc heated matrix, adjust welding current, reach the purpose of control heat input, that is, prevent mother metal from melting, cause that mother metal is fully heated again, to obtain abundant spreading wetting after ensureing the wire meltings of BNi 2, in welding, inert gas is passed through to weld zone, prevents face of weld oxidation stain or scaling loss.Postwelding carries out fluorescent inspection to its surface, the defects of face of weld flawless, pore-free.The use of welding tooling is eliminated, production efficiency is improved, reduces cost.
Description
Technical field
The present invention relates to a kind of repair method, the repair method of crackle at especially a kind of combustion box mounting bracket.
Background technology
Combustion box in aeronautical product is high-temperature alloy material a bit, and the mounting bracket outside casing barrel uses vacuum
In method for welding connection.After flight use after a while, it is often cracked at the soldered seam the defects of.If
The crackle of commissure is repaired using vacuum brazing method, it is necessary to make complicated frock by the modular construction of combustion box, it is raw
It is high to produce cost, efficiency is low.And the solder of original commissure is likely to occur trickling problem, the inside group of material during secondary vacuum soldering
Knitting structure may also have a negative impact, and not meet the basic principle of weld repairs.Carried out using this fusion welding method of argon arc welding
Repair, the local deformation of support is larger, and after back of weld penetration, scaling loss can be formed on wheel chamber casing surface when back-protective is bad
Defect, have a strong impact on the service life of product.In order to reduce shadow of the excessive heat input to accessory size surface quality as far as possible
Ring, at the same it is easy to operation, production efficiency is improved, it is technique skill the most rational to carry out weld repairs using arc brazing in argon method
Art.So-called arc brazing in argon is：Electric arc is produced as heating source by the use of tungsten electrode, by brazing filler metal melts, the defects of to repair place to be repaired,
And mother metal and a kind of infusible method for welding.The advantages of this method is：Without tool locating during welding, heat input is small, weldering
Jointing temp is less than argon arc welding, can reduce welding deformation.And the non-fusible oxidization burning loss problem that also effectively prevent the back side of mother metal.
But the welding method requires brazing filler metal melts, and mother metal will be fully warmed-up in electric arc heated to ensure that solder obtains effective wetting
Sprawl, matrix melts can not be made again.This just needs welder to be realized by reasonable control electric current and shield gas flow rate to heat input
Effective control of amount, high to the skill set requirements of welder, welding difficulty is larger, and China there is no to be repaired using arc brazing in argon and burn at present
The ripe repair method of crackle at the casing support of room.
The content of the invention
The technical problem to be solved in the present invention is：By adjusting welding current and shield gas flow rate these influence factors,
Rational welding parameter is found out, is realized in air ambient, the arc brazing in argon purpose under no frock protective condition, solves combustion
When soldered seam places under repair at mounting bracket outside burning room wheel chamber casing, Fixture Design manufacture is complicated, and welding deformation is big, production
The low technical problem of efficiency.
The present invention concrete technical scheme be, at described combustion box mounting bracket the repair method of crackle include with
Lower step：
1) pre weld inspection：Fluorescent inspection is carried out to combustion box to be repaired, determines crack defect at mounting bracket
Particular location；
2) mechanical chipping：The crackle on soldered seam at mounting bracket is polished totally, with white dacron with pneumatic grinder
Cloth dips in alcohol or acetone by polishing region wiped clean, untill calico not blackening；
3) ultrasonic wave cleans：Combustion box and soldering wire to be repaired are cleaned by ultrasonic, until removing whole
Untill the foul of part and welding wire surface；
4) arc brazing in argon：Arc brazing in argon welding is carried out using the welding equipment of argon arc welding, BNi-2 welding wires are as solder, weldering
When connecing repairing by welding current control in the range of 10A~30A, and inert gas is passed through to weld zone, gas flow scope is 8
~15L/min, nozzle diameter scope are 6mm~12mm；
5) postwelding is cleared up：Polishing welding seams surface after arc brazing in argon, unnecessary weld metal is removed, until obtaining round and smooth mistake
The arc brazing in argon weld seam crossed；
6) final inspection：Fluorescent inspection is carried out to arc brazing in argon position, to determine whether original crackle has repaired conjunction
Lattice, if linear discontinuities be present.
The welding method of the present invention uses the technique of arc brazing in argon, repairs the crack defect of soldered seam at mounting bracket.
While electric arc heated matrix, by adjusting welding current, reach the purpose of control heat input, that is, prevent mother metal from melting,
Cause that mother metal is fully heated again, to obtain abundant spreading wetting after ensureing BNi-2 wire meltings, in welding, to welding
Area is passed through inert gas, prevents face of weld oxidation stain or scaling loss.Postwelding to its surface carry out fluorescent inspection, face of weld without
The defects of crackle, pore-free.The use of welding tooling is eliminated, production efficiency is improved, reduces cost.
Brief description of the drawings
Fig. 1 is the structural representation for the combustion chamber for implementing technical solution of the present invention；
Fig. 2 is Fig. 1 left view.
Embodiment
As illustrated, the repair method of crackle comprises the following steps at combustion box mounting bracket：
1) pre weld inspection：Fluorescent inspection is carried out to combustion box 1 to be repaired, determines crack defect at mounting bracket 2
Particular location；
2) mechanical chipping：The crackle on soldered seam at mounting bracket 3 is polished totally, with white dacron with pneumatic grinder
Cloth dips in alcohol or acetone by polishing region wiped clean, untill calico not blackening；
3) ultrasonic wave cleans：Combustion box 1 to be repaired and soldering wire are cleaned by ultrasonic, until removing whole
Untill the foul of part and welding wire surface；
4) arc brazing in argon：Arc brazing in argon welding is carried out using the welding equipment of argon arc welding, BNi-2 welding wires are as solder, weldering
When connecing repairing by welding current control in the range of 10A~30A, and inert gas is passed through to weld zone, gas flow scope is 8
~15L/min, nozzle diameter scope are 6mm~12mm；
5) postwelding is cleared up：The surface of polishing welding seams 3 after arc brazing in argon, removes unnecessary weld metal, until obtaining round and smooth
The arc brazing in argon weld seam of transition；
6) final inspection：Fluorescent inspection is carried out to arc brazing in argon position, to determine whether original crackle has repaired conjunction
Lattice, if linear discontinuities be present.
Embodiment one
Certain aeroengine combustor buring room casing, in use for some time, mounting bracket is cracked, and it is repaiied
Reason, and flawless and linear discontinuities after repairing are required, its specific implementation steps is：
1) pre weld inspection：Fluorescent inspection is carried out to casing to be repaired, determines the particular location of crack defect at support；Should
Crackle is located at the vacuum brazing solder design of mounting bracket and casing main body.；
2) mechanical chipping：The crackle on soldered seam at mounting bracket is polished totally, with white dacron with pneumatic grinder
Cloth dips in alcohol or acetone by polishing region wiped clean, untill calico not blackening；
3) ultrasonic wave cleans：Combustion box and soldering wire to be repaired are cleaned by ultrasonic, until removing whole
Untill the foul of part and welding wire surface；
4) arc brazing in argon：Arc brazing in argon welding is carried out using the welding equipment of argon arc welding, the equipment is handed over for TIG375 Lincolns
Welding current is 10A during weld repairs, and be passed through indifferent gas to weld zone as solder by direct-flow argon-arc welder, BNi-2 welding wires
Body high-purity argon gas, gas flow scope are 15L/min, nozzle diameter 8mm；
5) postwelding is cleared up：Polishing welding seams surface after arc brazing in argon, unnecessary weld metal is removed, until obtaining round and smooth mistake
The arc brazing in argon weld seam crossed；
6) final inspection：With model YGST-1200 fluorescent penetration test equipment, fluorescence inspection is carried out to arc brazing in argon position
Test, do not find crackle and linear discontinuities, weldquality meets the requirement of related repair standard.
Embodiment two
Certain another aeroengine combustor buring room casing, in use for some time, mounting bracket is cracked, and it is entered
Row is repaired, and requires flawless and linear discontinuities after repairing, and its specific implementation steps is：
1) pre weld inspection：Fluorescent inspection is carried out to casing to be repaired, determines the particular location of crack defect at support；Should
Crackle is located at the vacuum brazing solder design of mounting bracket and casing main body.；
2) mechanical chipping：The crackle on soldered seam at mounting bracket is polished totally, with white dacron with pneumatic grinder
Cloth dips in alcohol or acetone by polishing region wiped clean, untill calico not blackening；
3) ultrasonic wave cleans：Combustion box and soldering wire to be repaired are cleaned by ultrasonic, until removing whole
Untill the foul of part and welding wire surface；
4) arc brazing in argon：Arc brazing in argon welding is carried out using the welding equipment of argon arc welding, the equipment is handed over for TIG375 Lincolns
Welding current is 10A during weld repairs, and be passed through indifferent gas to weld zone as solder by direct-flow argon-arc welder, BNi-2 welding wires
Body high-purity argon gas, gas flow scope are 10L/min, nozzle diameter 10mm；
5) postwelding is cleared up：Polishing welding seams surface after arc brazing in argon, unnecessary weld metal is removed, until obtaining round and smooth mistake
The arc brazing in argon weld seam crossed；
6) final inspection：With model YGST-1200 fluorescent penetration test equipment, fluorescence inspection is carried out to arc brazing in argon position
Test, do not find crackle and linear discontinuities, weldquality meets the requirement of related repair standard.
Embodiment three
The third certain aeroengine combustor buring room casing, in use for some time, mounting bracket is cracked, and it is entered
Row is repaired, and requires flawless and linear discontinuities after repairing, and its specific implementation steps is：
1) pre weld inspection：Fluorescent inspection is carried out to casing to be repaired, determines the particular location of crack defect at support；Should
Crackle is located at the vacuum brazing solder design of mounting bracket and casing main body.；
2) mechanical chipping：The crackle on soldered seam at mounting bracket is polished totally, with white dacron with pneumatic grinder
Cloth dips in alcohol or acetone by polishing region wiped clean, untill calico not blackening；
3) ultrasonic wave cleans：Combustion box and soldering wire to be repaired are cleaned by ultrasonic, until removing whole
Untill the foul of part and welding wire surface；
4) arc brazing in argon：Arc brazing in argon welding is carried out using the welding equipment of argon arc welding, the equipment is handed over for TIG375 Lincolns
Welding current is 24A during weld repairs, and be passed through indifferent gas to weld zone as solder by direct-flow argon-arc welder, BNi-2 welding wires
Body high-purity argon gas, gas flow scope are 10L/min, nozzle diameter 7mm；
5) postwelding is cleared up：Polishing welding seams surface after arc brazing in argon, unnecessary weld metal is removed, until obtaining round and smooth mistake
The arc brazing in argon weld seam crossed；
6) final inspection：With model YGST-1200 fluorescent penetration test equipment, fluorescence inspection is carried out to arc brazing in argon position
Test, do not find crackle and linear discontinuities, weldquality meets the requirement of related repair standard.
Claims (1)
- A kind of 1. repair method of crackle at combustion box mounting bracket, it is characterised in that described repair method include with Lower step：1) pre weld inspection：Fluorescent inspection is carried out to combustion box (1) to be repaired, determines mounting bracket (2) place crack defect Particular location；2) mechanical chipping：The crackle on soldered seam at mounting bracket (3) is polished totally, with white dacron cloth with pneumatic grinder Alcohol or acetone are dipped in by polishing region wiped clean, untill calico not blackening；3) ultrasonic wave cleans：Combustion box (1) to be repaired and soldering wire are cleaned by ultrasonic, until removing whole zero Untill the foul of part and welding wire surface；4) arc brazing in argon：Arc brazing in argon welding is carried out using the welding equipment of argon arc welding, BNi-2 welding wires are repaiied as solder, welding During reason by welding current control in the range of 10A~30A, and inert gas is passed through to weld zone, gas flow scope be 8~ 15L/min, nozzle diameter scope are 6mm~12mm；5) postwelding is cleared up：Polishing welding seams (3) surface, removes unnecessary weld metal after arc brazing in argon, until obtaining round and smooth The arc brazing in argon weld seam of transition；6) final inspection：Fluorescent inspection is carried out to arc brazing in argon position, to determine that whether original crackle has been repaired qualified, is It is no linear discontinuities to be present.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310560944.XA CN103586560B (en) | 2013-11-12 | 2013-11-12 | The repair method of crackle at a kind of combustion box mounting bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310560944.XA CN103586560B (en) | 2013-11-12 | 2013-11-12 | The repair method of crackle at a kind of combustion box mounting bracket |
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| Publication Number | Publication Date |
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| CN103586560A CN103586560A (en) | 2014-02-19 |
| CN103586560B true CN103586560B (en) | 2018-01-23 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345230A (en) * | 2015-11-18 | 2016-02-24 | 哈尔滨电气动力装备有限公司 | Argon arc brazing method for patch welding brazing seams of rotor connecting ring of shielding motor |
| CN105290632A (en) * | 2015-11-22 | 2016-02-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for repairing high-temperature alloy thin-walled cartridge receiver part through precision pulse welding |
| CN106392269A (en) * | 2016-09-20 | 2017-02-15 | 哈尔滨东安发动机（集团）有限公司 | Method for repairing brazing seams of different brazing filler metal vane structures |
| CN106583883B (en) * | 2017-01-18 | 2019-04-12 | 新兴能源装备股份有限公司 | A kind of thin-wall stainless steel leak hole method for welding |
| CN106914670B (en) * | 2017-01-18 | 2019-04-12 | 新兴能源装备股份有限公司 | A kind of Steel Thin-Wall leak hole method for welding |
| CN110328435B (en) * | 2019-06-11 | 2021-10-19 | 中国人民解放军第五七一九工厂 | Titanium alloy narrow space welding method |
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