CN105345230A - Argon arc brazing method for patch welding brazing seams of rotor connecting ring of shielding motor - Google Patents
Argon arc brazing method for patch welding brazing seams of rotor connecting ring of shielding motor Download PDFInfo
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- CN105345230A CN105345230A CN201510795251.8A CN201510795251A CN105345230A CN 105345230 A CN105345230 A CN 105345230A CN 201510795251 A CN201510795251 A CN 201510795251A CN 105345230 A CN105345230 A CN 105345230A
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- welding
- brazing
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- connecting ring
- shortcoming
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
- B23K35/0227—Rods, wires
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/302—Cu as the principal constituent
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to an argon arc brazing method for patch welding brazing seams of a rotor connecting ring of a shielding motor. A manual argon tungsten-arc welding method is utilized to patch weld the defect which is found after brazing seams between a rotor copper stripe and connecting induction brazing is finally processed; and a finally-processed defect area to be patch welded is heated through the manual argon tungsten-arc welding method to achieve the brazing temperature, and filling metal is fed continuously at the same to obtain full brazing seams. The argon arc brazing method has the beneficial effects of avoiding preheating in patch welding, being small in effect on peripheral brazing seam areas, being simple in welding operation, being attractive in brazing seam shape and being high in welding quality.
Description
Technical field: the arc brazing in argon method that the present invention relates to the repair welding of a kind of shielding motor rotor connecting ring brazed seam.
Background technology: main pump shield electric machine is the key equipment in the non-active nuclear island of nuclear power station of third generation AP1000, its integrality is to the safe operation important of primary Ioops, and be directly connected to the success or failure of the non-active nuclear power station technology transfer of third generation AP1000, wherein the induction brazing of rotor bar and connecting ring brazed seam is the critical process that main pump shield electric machine manufactures in link.Soldering is carried out owing to adopting monoblock type induction brazing mode, control by parts assembly precision, workpiece and inductor are fitted not exclusively, cause heating temperature rise inconsistent, joint gap changes greatly, obstruction is filled up brazed seam, after causing the processing of brazed seam exposed metal not full, there is the problem that crackle or joint are mixed into impurity effect joint quality.Weldquality is required that high one loop of nuclear power station main pump motor rotor pole is inapplicable.Still there are some problems in common rotor copper bar and the connecting ring induction brazing brazed seam method for repairing and mending that lacks, as gas brazing, welding region will adopt higher uniform heating temperature welding, and the heat time is long.But also to ensure that welding process is carried out continuously.Shortcoming is: welding temperature is high, and the condition of work of workman is very severe, heating-up temperature more difficult grasp during manual operations, and welding needs many people operation simultaneously, high to the technical requirement of workman; The thermal capacity of input is large, and welding heat affected zone is comparatively large, and structure and properties changes greatly.
Summary of the invention: the arc brazing in argon method that the object of this invention is to provide the repair welding of a kind of shielding motor rotor connecting ring brazed seam, pore, crackle, the discontinuous shortcoming that exceeds standard of incomplete fusion and surface are existed to brazed seam, is found after connecting ring is finally processed and carry out repair welding.
Technical scheme of the present invention is: the arc brazing in argon method of a kind of shielding motor rotor connecting ring brazed seam repair welding:
(1) adopt GTAW method for welding repair welding main pump motor rotor bar and connecting ring induction brazing to fill joint and finally process the rear shortcoming found;
(2) main pump motor rotor bar and connecting ring induction brazing fill joint lack the exposed metal that refers to the filling joint caused in rotor bar and connecting ring induction brazing process not full, there is the problem that crackle or joint are mixed into impurity effect joint quality, these joints shortcoming is found and is carried out repair welding after connecting ring is finally processed;
(3) welding parameter: to lack concrete size according to repair welding, select current range in 70A-200A, the minimum 9V of voltage, wire feed rate and speed of welding, adjustment is filled metal and is sent angle to reach best continuous fill conditions, obtains optimal filling joint quality;
(4) main pump motor rotor bar and connecting ring adopt the UNS-C10700 material in the Unified Numbering System (UNS) of U.S. automotive engineer association (SAE) and American Society Testing and Materials (ASTM) Joint Designing, select copper-phosphorus alloy (American Welding Society (AWS) (AWS) standard A 5.8/A5.8MBCuP-5) welding wire of answering solder consistent with original sense, in conjunction with the requirement of repair welding joint area, select the packing material of taproot form, minimum gage of wire is 1/16 " (1.6mm), carry out continuous wire feed by hand-held;
This kind of new process is applied in product piece, and weldquality is good, reaches expection requirement.
The present invention establishes a kind of GTAW method for welding for main pump shield electric machine critical component rotor bar and the repair welding of connecting ring brazed seam, by adopting GTAW method, shortcoming after final processing is treated that repair welding region is heated, it is made to reach brazing temperature, continue to send filling metal to simultaneously, obtain full soldered seam.Advantage of the present invention is: 1. weld with the without preheating of connecting ring brazed seam repair welding with the rotor bar that this method can realize under GTAW.2. adopt copper-phosphorus alloy (American Welding Society (AWS) (AWS) standard A 5.8/A5.8MBCuP-5) welding wire, brazing temperature is at 1300 ~ 1500 below ℉, effectively can reduce mother metal fusing little on neighboring area impact, after rotor is finally processed, can treat that repair welding region is welded to shortcoming.3. repair welding front surface is only cleared up, and without the need to specially treated, simple to operate, joint is reliable.4. utilize argon arc welding heat to concentrate, larger fusion penetration can be obtained, be out of shape little, brazed seam forming.
Detailed description of the invention:
An arc brazing in argon method for shielding motor rotor connecting ring brazed seam repair welding, detailed description of the invention is:
(1) adopt GTAW method for welding repair welding main pump motor rotor bar and is connected induction brazing brazed seam and is processing final the shortcoming found afterwards;
(2) rotor copper bar and connecting ring induction brazing brazed seam lack the exposed metal that refers to the filling joint caused in rotor bar and connecting ring induction brazing process not full, there is the problem that crackle or joint are mixed into impurity effect joint quality, these joints shortcoming is found and is needed repair welding after connecting ring is finally processed;
(3) welding parameter: to lack concrete size according to repair welding, select current range in 70A-200A, the minimum 9V of voltage, wire feed rate and speed of welding, adjustment is filled metal and is sent angle to reach best continuous fill conditions, obtains optimal filling joint quality;
(4) main pump motor rotor bar and connecting ring adopt the UNS-C10700 material in the Unified Numbering System (UNS) of U.S. automotive engineer association (SAE) and American Society Testing and Materials (ASTM) Joint Designing, select copper-phosphorus alloy (American Welding Society (AWS) (AWS) standard A 5.8/A5.8MBCuP-5) welding wire of answering solder consistent with original sense, in conjunction with the requirement of repair welding joint area, select the packing material of taproot form, minimum gage of wire is 1/16 " (1.6mm), carry out continuous wire feed by hand-held;
(5) welding method: 1) adopt tungsten argon arc method for welding; 2) mend preweld cleaning: first utilize wire brush, file, scraper or the cloth speckling with aluminium oxide process, and then clean the oxide skin and other objectionable impurities of filling metal and repair welding region by the method for alcohol or acetone soln wiping; 3) shortcoming processing: adopt polishing or the associated methods that adds of machine, remove crackle or injurous defect, links together underproof braze filler joint shortcoming, for repair welding provides a suitable condition; 4) tungsten argon arc soldering method is adopted to carry out soldering, electric current, the voltage of adjustment coupling before welding, adjustment welding gun and wire feed angle are to reach best continuous fill conditions, adopt high frequency starting the arc mode, welding gun does linear reciprocating motion in region to be welded, by the electric arc produced between tungsten electrode and weldment, heating and melting fills metal, in welding process, operator carries out wire feed fine position according to seam appearance situation, wire feed position is kept to be positioned at welding pool center, welding line joint cool to room temperature in atmosphere after welding; 5) check after repair welding: postwelding checks repair welding brazing quality, five times of magnifying glass butt welded seam joint outer surfaces are utilized to check, should there is not crackle, mother metal fusing, not melt the discontinuous shortcoming that exceeds standard of solder and surface, also need to carry out liquid penetrant inspection (PT) to check that surface does not exist crackle, surface pores shortcoming.
Claims (1)
1. an arc brazing in argon method for shielding motor rotor connecting ring brazed seam repair welding, is characterized in that:
(1) adopt GTAW method for welding repair welding main pump motor rotor bar and is connected induction brazing brazed seam and is processing final the shortcoming found afterwards;
(2) rotor copper bar and connecting ring induction brazing brazed seam lack the exposed metal that refers to the filling joint caused in rotor bar and connecting ring induction brazing process not full, there is the problem that crackle or joint are mixed into impurity effect joint quality, these joints shortcoming is found and is needed repair welding after connecting ring is finally processed;
(3) welding parameter: to lack concrete size according to repair welding, select current range in 70A-200A, the minimum 9V of voltage, wire feed rate and speed of welding, adjustment is filled metal and is sent angle to reach best continuous fill conditions, obtains optimal filling joint quality;
(4) main pump motor rotor bar and connecting ring adopt the UNS-C10700 material in the Unified Numbering System (UNS) of U.S. automotive engineer association (SAE) and American Society Testing and Materials (ASTM) Joint Designing, select copper-phosphorus alloy (American Welding Society (AWS) (AWS) standard A 5.8/A5.8MBCuP-5) welding wire of answering solder consistent with original sense, in conjunction with the requirement of repair welding joint area, select the packing material of taproot form, minimum gage of wire is 1/16 " (1.6mm), carry out continuous wire feed by hand-held;
(5) welding method: 1) adopt tungsten argon arc method for welding; 2) mend preweld cleaning: first utilize wire brush, file, scraper or the cloth speckling with aluminium oxide process, and then clean the oxide skin and other objectionable impurities of filling metal and repair welding region by the method for alcohol or acetone soln wiping; 3) shortcoming processing: adopt polishing or the associated methods that adds of machine, remove crackle or injurous defect, links together underproof braze filler joint shortcoming, for repair welding provides a suitable condition; 4) tungsten argon arc soldering method is adopted to carry out soldering, electric current, the voltage of adjustment coupling before welding, adjustment welding gun and wire feed angle are to reach best continuous fill conditions, adopt high frequency starting the arc mode, welding gun does linear reciprocating motion in region to be welded, by the electric arc produced between tungsten electrode and weldment, heating and melting fills metal, in welding process, operator carries out wire feed fine position according to seam appearance situation, wire feed position is kept to be positioned at welding pool center, welding line joint cool to room temperature in atmosphere after welding; 5) check after repair welding: postwelding checks repair welding brazing quality, five times of magnifying glass butt welded seam joint outer surfaces are utilized to check, should there is not crackle, mother metal fusing, not melt the discontinuous shortcoming that exceeds standard of solder and surface, also need to carry out liquid penetrant inspection (PT) to check that surface does not exist crackle, surface pores shortcoming.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510795251.8A CN105345230A (en) | 2015-11-18 | 2015-11-18 | Argon arc brazing method for patch welding brazing seams of rotor connecting ring of shielding motor |
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| CN201510795251.8A CN105345230A (en) | 2015-11-18 | 2015-11-18 | Argon arc brazing method for patch welding brazing seams of rotor connecting ring of shielding motor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106425044A (en) * | 2016-11-28 | 2017-02-22 | 哈尔滨电气动力装备有限公司 | Method for connecting temperature measuring lines of nuclear main pump shielding motor resistance type temperature detector |
| CN106583883A (en) * | 2017-01-18 | 2017-04-26 | 新兴能源装备股份有限公司 | Braze-welding method for thin-wall stainless steel leakage holes |
| CN117620506A (en) * | 2024-01-24 | 2024-03-01 | 大连环友屏蔽泵有限公司 | Copper bar rotor welding tool for shielding pump and welding method of copper bar rotor welding tool |
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| EP0744812A2 (en) * | 1995-05-26 | 1996-11-27 | General Motors Corporation | Brazing copper end rings and bars in an induction motor rotor by induction heating |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106425044A (en) * | 2016-11-28 | 2017-02-22 | 哈尔滨电气动力装备有限公司 | Method for connecting temperature measuring lines of nuclear main pump shielding motor resistance type temperature detector |
| CN106583883A (en) * | 2017-01-18 | 2017-04-26 | 新兴能源装备股份有限公司 | Braze-welding method for thin-wall stainless steel leakage holes |
| 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 |
| CN117620506A (en) * | 2024-01-24 | 2024-03-01 | 大连环友屏蔽泵有限公司 | Copper bar rotor welding tool for shielding pump and welding method of copper bar rotor welding tool |
| CN117620506B (en) * | 2024-01-24 | 2024-03-29 | 大连环友屏蔽泵有限公司 | Copper bar rotor welding tool for shielding pump and welding method of copper bar rotor welding tool |
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Application publication date: 20160224 |
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