CN114799679B - Welding process for process window of thin-wall casing - Google Patents
Welding process for process window of thin-wall casing Download PDFInfo
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- CN114799679B CN114799679B CN202210349666.2A CN202210349666A CN114799679B CN 114799679 B CN114799679 B CN 114799679B CN 202210349666 A CN202210349666 A CN 202210349666A CN 114799679 B CN114799679 B CN 114799679B
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- process window
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a welding process for a process window of a thin-wall casing, which comprises the steps of inserting an anti-deformation tool between an outer ring and an inner ring of the casing, attaching the surface of the anti-deformation tool to the inner wall of the outer ring, arranging the anti-deformation tool corresponding to the process window, fixing a patch block by the assembly tool, placing the patch block into the process window, fixing the patch block and the process window by adopting a spot welding mode, removing the assembly tool, welding the patch block and the inner wall of the process window by adopting a single welding mode, introducing argon gas into the back surface of the process window during welding, and taking down the anti-deformation tool after the welding position is cooled to room temperature; according to the invention, the deformation-preventing tool is used for supporting the inner wall of the outer ring of the casing, the patch is clamped and fixed by the assembly tool, and the patch is welded and fixed on the outer ring of the casing by adopting spot welding and single-pass welding, so that the deformation caused by welding stress is effectively controlled, the quality of the outer pipe on the welding surface is improved, the production operation is convenient, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of casing repair welding, in particular to a welding process for a process window of a thin-wall casing.
Background
In the field of aero-engines, engine casing castings often have complex structures, irregular shapes, high dimensional accuracy requirements and extremely high casting difficulty. As shown in fig. 2, the casing leaves a process window on the outer ring according to the requirement during production, and the process window needs to be sealed and welded at the later stage of casing production. When the existing thin-wall casing process window is in sealing welding, two persons are required to operate in a matched mode, the welding line is large in size deformation, the sizes of the staggered edges and the like are not well controlled, the welding line appearance quality is poor, and the welding efficiency is low.
Disclosure of Invention
The invention mainly aims to provide a welding process for a process window of a thin-wall casing, which supports the inner wall of an outer ring of the casing through an anti-deformation tool, clamps patch blocks by utilizing an assembly tool to clamp the patch blocks, and fixes the patch blocks on the outer ring of the casing in a spot welding and single-pass welding mode, so that the deformation caused by welding stress is effectively controlled, the quality of an outer pipe on the welding surface is improved, the production operation is convenient, the production efficiency is improved, and the problems in the background art can be effectively solved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a welding process for a process window of a thin-wall casing comprises the following steps:
step one, determining a process window welding workpiece, wherein the process window welding workpiece comprises a casing with a process window, a patch block, an anti-deformation tool and an assembly tool;
step two, determining a welding groove of a process window, wherein the bevel angle of the process window is 45-55 degrees, the bevel angle of the patch block is 30-40 degrees, and the included angle between the groove of the process window and the groove of the patch block is 80-90 degrees;
inserting an anti-deformation tool between the outer ring and the inner ring of the casing, wherein the surface of the anti-deformation tool is attached to the inner wall of the outer ring, and the anti-deformation tool is arranged corresponding to the process window;
fourthly, fixing the patch block by the assembly fixture and placing the patch block into the process window;
fixing the patch block and the process window in a spot welding mode, and introducing argon into the back of the process window during welding;
step six, dismantling the assembly tool, welding the patch block with the inner wall of the process window in a single-pass welding mode, and introducing argon into the back of the process window during welding;
and seventhly, taking down the deformation-preventing tool after the repair welding position is cooled to room temperature, and checking the welding line.
The deformation-preventing tool comprises a supporting plate matched with the inner side wall of the casing, a through groove is formed in the supporting plate, and a wedging block is inserted into the through groove and is inserted into the through groove, so that the supporting plate is tightly attached to the inner wall of the casing with a process window.
An annular groove is formed in one side face, close to the process window, of the supporting plate, a protruding table is formed in the annular groove, patch blocks are placed on the protruding table, and argon is introduced into the annular groove.
The assembly fixture comprises a negative pressure sucker and a negative pressure device, wherein the negative pressure sucker is connected with a hose through a locating piece, and the hose is connected with the negative pressure device.
The locating piece comprises a rigid through pipe, the flexible pipe is connected with the negative pressure sucker through the rigid through pipe, the outer side of the rigid through pipe is limited and rotatably connected with the rotary table, locating columns connected into a whole are arranged on two sides of the rotary table, the negative pressure sucker adsorbs patch blocks to be fixed, when the patch blocks are installed on a process window, the two locating columns are respectively located on two sides of the patch blocks, the bottom surfaces of the locating columns are attached to the surface of the casing and the top surface of the patch blocks, and the patch blocks are located and placed on the process window.
The minimum distance between the patch block and the process window is not more than 0.5mm, and the distance between the slope toe of the process window and the inner wall of the casing is not more than 0.5mm.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the deformation-preventing tool is used for supporting the inner wall of the outer ring of the casing, the patch block is clamped and fixed by the assembly tool, and the patch block is welded and fixed on the outer ring of the casing by adopting spot welding and single-pass welding modes, so that the deformation caused by welding stress is effectively controlled, the quality of the outer pipe on the welding surface is improved, the production operation is convenient, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a process window repair weld of the present invention;
FIG. 2 is a schematic view of a process window to be repaired of a casing according to the present invention;
FIG. 3 is a schematic view of a patch and a case process window of the present invention to be spot welded;
FIG. 4 is a schematic plan view of the structure of the anti-deformation tooling of the present invention;
fig. 5 is a schematic structural diagram of an assembly fixture according to the present invention.
In the figure: 1. a casing; 2. a process window; 3. patch blocks; 4. an anti-deformation tool; 41. a support plate; 42. a through groove; 43. wedging blocks; 44. an annular groove; 45. a boss; 46. a vent groove; 5. assembling a tool; 51. a negative pressure suction cup; 52. a negative pressure device; 53. a positioning piece; 531. a rigid tube; 532. a turntable; 533. positioning columns; 54. and (3) a hose.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
A welding process for a process window of a thin-wall casing comprises the following steps:
step one, as shown in fig. 1-2, determining a process window welding workpiece, wherein the process window welding workpiece comprises a case 1 with a process window 2, a patch 3, an anti-deformation tool 4 and an assembly tool 5;
step two, determining a welding groove of the process window 2, wherein the bevel angle of the process window 2 is 45-55 degrees, the bevel angle of the patch 3 is 30-40 degrees, and the included angle between the groove of the process window 2 and the groove of the patch 3 is 80-90 degrees;
step three, inserting a deformation preventing tool 4 between the outer ring and the inner ring of the casing 1, wherein the surface of the deformation preventing tool 4 is attached to the inner wall of the outer ring, and the deformation preventing tool 4 is arranged corresponding to the process window 2;
step four, as shown in fig. 3, the assembly fixture 5 fixes the patch 3 and places the patch 3 into the process window 2;
fixing the patch 3 and the process window 2 in a spot welding mode, wherein the maximum spot welding current is 30 amperes, the welding wire is a straight bar with the diameter of 0.8mm, the maximum height of the welding spot is 1.5mm, the subsequent welding is influenced too much, and argon is introduced into the back of the process window 2 during the welding;
step six, dismantling the assembly fixture 5, welding the patch 3 with the inner wall of the process window 2 in a single-pass welding mode, finishing one layer at a time when welding in a single-pass mode, finishing the welding in two layers, wherein the maximum welding current is 45 amperes, the welding wire adopts straight bars with the diameter of 1.6mm, and argon is introduced into the back of the process window 2 for welding protection when welding;
and seventhly, taking down the deformation-preventing tool after the repair welding position is cooled to room temperature, and checking the welding line.
As shown in fig. 4, the anti-deformation tooling 4 comprises two supporting plates 41 matched with the inner side wall of the casing 1, wherein two supporting plates 41 are respectively attached to the inner side wall of the outer ring of the casing and the inner side surface of the inner ring of the casing, through grooves 42 are formed in opposite sides of the two supporting plates 41, wedge blocks 43 are inserted into the through grooves 42 of the two supporting plates 41, the wedge blocks 43 are inserted into the through grooves 43 so that the two supporting plates 41 are respectively attached to the inner side wall of the outer ring of the casing 1 with the process window 2 and the inner side surface of the inner ring, and are similar to the process window 1, two plates are inserted into an annular groove and are tightly attached to the upper ring and the lower ring by utilizing an intermediate block, an annular groove 44 is formed in one side surface of the supporting plate 41 close to the process window 2, a raised table 45 is formed in the annular groove 44, the patch block 3 is placed on the raised table 45, and argon is introduced into the annular groove 44, and both ends of the annular groove 44 are provided with a ventilation groove 46 for protecting welding.
As shown in fig. 5, the assembly fixture 5 includes a negative pressure suction cup 51 and a negative pressure device 52, the negative pressure suction cup 51 is connected with a hose 54 through a positioning piece 53, the hose 54 is connected with the negative pressure device 52, the negative pressure device 52 is connected with a vacuum pump, so that the negative pressure suction cup 51 is tightly attached to the surface of the patch block 3, the positioning piece 53 includes a rigid through pipe 531, the hose 54 and the negative pressure suction cup 51 are connected together by the rigid through pipe 531, the outer side of the rigid through pipe 531 is limited and rotatably connected with a turntable 532, positioning columns 533 which are integrally connected are arranged on two sides of the turntable 532, the negative pressure suction cup 51 adsorbs the patch block 3 to be fixed, when the assembly fixture is mounted on the process window 2, the two positioning columns 533 are respectively located on two sides of the patch block 3, the bottom surface of the positioning columns 533 is attached to the outer ring surface of the casing 1 and the top surface of the patch block 3, so that the patch block 3 is positioned and placed on the process window 2, the minimum distance between the patch block 3 and the surface of the process window 2 is not greater than 0.5mm, and the distance between the sloping foot of the process window 2 and the outer ring inner wall of the casing 1 is not greater than 0.5mm.
According to the invention, the deformation-preventing tool 4 is used for supporting the inner wall of the outer ring of the casing 1 to prevent deformation, the patch 3 is clamped and fixed by the assembly tool 4, the patch 3 is welded and fixed on the outer ring of the casing 1 by adopting spot welding and single-pass welding modes, the deformation caused by welding stress is effectively controlled, the quality of the outer pipe on the welding surface is improved, the production operation is convenient, and the production efficiency is improved.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (6)
1. A welding process for a process window of a thin-wall casing is characterized in that: the method comprises the following steps:
step one, determining a process window welding workpiece, wherein the process window welding workpiece comprises a casing with a process window, a patch block, an anti-deformation tool and an assembly tool;
step two, determining a welding groove of a process window, wherein the bevel angle of the process window is 45-55 degrees, the bevel angle of the patch block is 30-40 degrees, and the included angle between the groove of the process window and the groove of the patch block is 80-90 degrees;
inserting an anti-deformation tool between the outer ring and the inner ring of the casing, wherein the surface of the anti-deformation tool is attached to the inner wall of the outer ring, and the anti-deformation tool is arranged corresponding to the process window;
fourthly, fixing the patch block by the assembly fixture and placing the patch block into the process window;
fixing the patch block and the process window in a spot welding mode, and introducing argon into the back of the process window during welding;
step six, dismantling the assembly tool, welding the patch block with the inner wall of the process window in a single-pass welding mode, and introducing argon into the back of the process window during welding;
and seventhly, taking down the deformation-preventing tool after the repair welding position is cooled to room temperature, and checking the welding line.
2. The thin-wall casing process window welding process according to claim 1, wherein: the deformation-preventing tool comprises a supporting plate matched with the inner side wall of the casing, a through groove is formed in the supporting plate, a wedging block is inserted into the through groove, and the wedging block is inserted so that the supporting plate is clung to the inner wall of the casing with a process window.
3. The thin-wall casing process window welding process according to claim 2, wherein: an annular groove is formed in one side face, close to the process window, of the supporting plate, a protruding table is formed in the annular groove, patch blocks are placed on the protruding table, and argon is introduced into the annular groove.
4. The thin-wall casing process window welding process according to claim 1, wherein: the assembly fixture comprises a negative pressure sucker and a negative pressure device, wherein the negative pressure sucker is connected with a hose through a locating piece, and the hose is connected with the negative pressure device.
5. The thin-wall casing process window welding process according to claim 4, wherein: the locating piece comprises a rigid through pipe, the flexible pipe is connected with the negative pressure sucker through the rigid through pipe, the outer side of the rigid through pipe is limited and rotatably connected with the rotary table, and locating columns connected into a whole are arranged on two sides of the rotary table.
6. The thin-wall casing process window welding process according to claim 1, wherein: the minimum distance between the patch block and the process window is not more than 0.5mm, and the distance between the slope toe of the process window and the inner wall of the casing is not more than 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210349666.2A CN114799679B (en) | 2022-04-02 | 2022-04-02 | Welding process for process window of thin-wall casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210349666.2A CN114799679B (en) | 2022-04-02 | 2022-04-02 | Welding process for process window of thin-wall casing |
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| Publication Number | Publication Date |
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| CN114799679A CN114799679A (en) | 2022-07-29 |
| CN114799679B true CN114799679B (en) | 2023-04-25 |
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| CN202210349666.2A Active CN114799679B (en) | 2022-04-02 | 2022-04-02 | Welding process for process window of thin-wall casing |
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| CN105290571A (en) * | 2015-11-17 | 2016-02-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Manual welding device and method for barrel and mounting edge of thin-wall casing |
| CN110340495A (en) * | 2019-08-01 | 2019-10-18 | 中国航发成都发动机有限公司 | A kind of integrated frock clamp and its assembly method for Thin-Wall Outer Casing welding heat treatment |
| CN113145978A (en) * | 2021-04-16 | 2021-07-23 | 鞍钢股份有限公司 | Intermediate transition welding method for titanium steel composite plate |
| CN214444220U (en) * | 2021-02-23 | 2021-10-22 | 贵州安吉航空精密铸造有限责任公司 | Repair welding tool for large-sized casing casting |
| CN113681183A (en) * | 2021-10-27 | 2021-11-23 | 中国航发沈阳黎明航空发动机有限责任公司 | Special fixture for welding multi-weld-seam leaf-ring parts and welding deformation control method |
| CN113681125A (en) * | 2021-08-31 | 2021-11-23 | 北京星航机电装备有限公司 | Defect repairing method for special-shaped thin-wall oil storage structural part |
| CN113909724A (en) * | 2021-10-20 | 2022-01-11 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for controlling straightness and position of titanium alloy thin-wall welding casing support plate |
-
2022
- 2022-04-02 CN CN202210349666.2A patent/CN114799679B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105290571A (en) * | 2015-11-17 | 2016-02-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Manual welding device and method for barrel and mounting edge of thin-wall casing |
| CN110340495A (en) * | 2019-08-01 | 2019-10-18 | 中国航发成都发动机有限公司 | A kind of integrated frock clamp and its assembly method for Thin-Wall Outer Casing welding heat treatment |
| CN214444220U (en) * | 2021-02-23 | 2021-10-22 | 贵州安吉航空精密铸造有限责任公司 | Repair welding tool for large-sized casing casting |
| CN113145978A (en) * | 2021-04-16 | 2021-07-23 | 鞍钢股份有限公司 | Intermediate transition welding method for titanium steel composite plate |
| CN113681125A (en) * | 2021-08-31 | 2021-11-23 | 北京星航机电装备有限公司 | Defect repairing method for special-shaped thin-wall oil storage structural part |
| CN113909724A (en) * | 2021-10-20 | 2022-01-11 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for controlling straightness and position of titanium alloy thin-wall welding casing support plate |
| CN113681183A (en) * | 2021-10-27 | 2021-11-23 | 中国航发沈阳黎明航空发动机有限责任公司 | Special fixture for welding multi-weld-seam leaf-ring parts and welding deformation control method |
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| CN114799679A (en) | 2022-07-29 |
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