CN112192125B - Electron beam welding protector - Google Patents
Electron beam welding protector Download PDFInfo
- Publication number
- CN112192125B CN112192125B CN202011052893.6A CN202011052893A CN112192125B CN 112192125 B CN112192125 B CN 112192125B CN 202011052893 A CN202011052893 A CN 202011052893A CN 112192125 B CN112192125 B CN 112192125B
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- Prior art keywords
- inner ring
- gland
- electron beam
- protection plates
- top surface
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- 238000003466 welding Methods 0.000 title claims abstract description 30
- 238000010894 electron beam technology Methods 0.000 title claims abstract description 21
- 230000001012 protector Effects 0.000 title description 2
- 210000004907 gland Anatomy 0.000 claims abstract description 39
- 238000003825 pressing Methods 0.000 claims description 35
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 239000000696 magnetic material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- 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
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
-
- 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
- B23K15/00—Electron-beam welding or cutting
- B23K15/0046—Welding
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an electron beam welding protection device, which comprises an inner ring clamp and a gland; the top surface of the inner ring clamp is circular, a plurality of lower protection plates are uniformly distributed on the top surface for one circle, the lower protection plates are perpendicular to the top surface of the inner ring clamp, and the number of the lower protection plates is the same as that of the blades in the fan casing; one side of the lower protection plate is a binding surface of the lower protection plate, and the binding surface of the lower protection plate is the same as the shape of the basin side of the blade; the bottom surface of the gland is circular, a plurality of upper protection plates are uniformly distributed on the bottom surface for one circle, the upper protection plates are perpendicular to the bottom surface of the gland, the number of the upper protection plates is the same as that of the lower protection plates, and the distance between every two adjacent upper protection plates is the same as that between every two adjacent lower protection plates; go up guard plate one side and be its binding face, the binding face of going up the guard plate is the same with blade dorsal part shape, and gland bottom surface lock is at inner ring anchor clamps top surface, goes up the crisscross setting of guard plate and lower guard plate. Can be with last guard plate and the crisscross setting of guard plate down between the blade, protect fan machine casket, improve welding efficiency.
Description
Technical Field
The invention belongs to the field of welding of fan casings, and relates to an electron beam welding protection device.
Background
With the continuous development of science and technology, new processes and methods are developed, the production speed is increased, the requirement on the production period is shortened, and the welding quality is improved continuously. In the whole welding process of the parts, due to various reasons such as part materials and the like, the electron beam current cannot be adjusted to accurate parameters, and a corresponding protection device needs to be arranged in the tool clamp aiming at the welding electron beam current. The method comprises the steps that before a fan casing assembly is welded by an electron beam in a part workshop, positioning-welded parts are installed into an electron beam welding fixture and fixed by an operator, then protection plates are installed one by one, the condition that each protection plate is installed in place is checked, if the protection plates are not installed in place, the protection plates need to be disassembled and reinstalled until the gap between the protection plates and the blade molded surfaces is 0.1-0.3 mm, welding can be carried out, and the protection plates are disassembled one by one after welding is completed. The number of the blades to be welded in the fan casing assembly is large (45-140 blades), a protection plate needs to be installed on the basin back of each blade and fixed on the clamp body through screws, dozens of or even hundreds of protection plates need to be installed repeatedly before each part is welded, the protection plates are dismantled after welding is completed, the whole process needs 20-30 minutes, and operation is very complicated. Low efficiency and high labor intensity.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned disadvantages of the prior art, and to provide an electron beam welding protective device, which can be assembled or disassembled for all protective plates only by one time.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
an electron beam welding protection device comprises an inner ring clamp and a gland;
the top surface of the inner ring clamp is circular, a plurality of lower protection plates are uniformly distributed on the top surface for one circle, the lower protection plates are perpendicular to the top surface of the inner ring clamp, and the number of the lower protection plates is the same as that of the blades in the fan casing; one side of the lower protection plate is a binding surface of the lower protection plate, and the binding surface of the lower protection plate is the same as the shape of the basin side of the blade; the bottom surface of the gland is circular, a plurality of upper protection plates are uniformly distributed on the bottom surface for one circle, the upper protection plates are perpendicular to the bottom surface of the gland, the number of the upper protection plates is the same as that of the lower protection plates, and the distance between every two adjacent upper protection plates is the same as that between every two adjacent lower protection plates; go up guard plate one side and be its binding face, the binding face of going up the guard plate is the same with blade dorsal part shape, and gland bottom surface lock is at inner ring anchor clamps top surface, goes up the crisscross setting of guard plate and lower guard plate.
Preferably, the top surface of the inner ring clamp is provided with a positioning rod perpendicular to the top surface, and the gland is provided with a positioning hole corresponding to the positioning rod.
Preferably, the center of the inner ring clamp is provided with a convex ring, the diameter of the convex ring is smaller than that of the inner ring of the fan casing, a radial bolt hole is formed in the inner circle of the convex ring, and a bolt is arranged on the bolt hole.
Furthermore, a plurality of first pressing assemblies are uniformly distributed in the convex ring and used for fixedly connecting the convex ring with the inner ring of the fan casing.
Preferably, the bottom of the inner ring clamp is provided with a base, a pressing shaft is arranged at the center of the base and penetrates through the inner ring clamp and the gland, an external thread is arranged at the free end of the pressing shaft, and a pressing nut is connected with the external thread.
Furthermore, a plurality of second pressing assemblies are uniformly distributed on the top surface of the base close to the edge, and the fan casing and the base are fixed through the second pressing assemblies.
Further, all the components are made of nonmagnetic materials.
Preferably, after the gland and the inner ring clamp are buckled, the total width of the adjacent upper protection plate and the lower protection plate is smaller than the distance between the adjacent blades.
Preferably, the distance between the surface of the blade and the upper protection plate or the lower protection plate is 0.10 mm-0.30 mm.
Preferably, the length of each of the upper and lower guard plates is greater than the width of the blade.
Compared with the prior art, the invention has the following beneficial effects:
according to the device, the protection plates on all the blade basin sides are integrated, the upper protection plates and the lower protection plates are arranged between the blades in a staggered mode through the pressing cover and the inner ring clamp, the fan casing is protected, the operation is convenient, the speed and the labor are saved, the number of operators is reduced, and the welding efficiency is improved.
Furthermore, the gland and the inner ring clamp are concentric through the matching of the positioning rod and the positioning hole, and the only position is ensured.
Furthermore, through the bolt on the bulge loop, can make the inner ring anchor clamps and the inner ring interference fit of fan machine casket, stability when guaranteeing the welding.
Further, the first subassembly that compresses tightly can be connected the inner ring of bulge loop and fan machine casket fixedly, stability when guaranteeing the welding.
Further, through hold-down shaft and gland nut, can fix gland and inner ring anchor clamps.
Furthermore, the fan casing and the base are fixed through the second pressing component, and stability during welding is guaranteed.
Drawings
FIG. 1 is a schematic structural diagram of a fan case according to the present invention;
FIG. 2 is a schematic view of the structure of the protection device of the present invention;
FIG. 3 is an exploded view of the shield structure of the present invention;
FIG. 4 is a schematic view of a base structure of the present invention;
FIG. 5 is a schematic structural view of an inner ring fixture body according to the present invention;
FIG. 6 is a schematic view of the inner ring clamp of the present invention;
FIG. 7 is a schematic view of the structure of the lower guard plate of the present invention;
FIG. 8 is a schematic structural view of the gland body of the present invention;
FIG. 9 is a schematic view of the gland structure of the present invention;
fig. 10 is a schematic structural view of an upper protection plate according to the present invention.
Wherein: 1-a base; 2-an inner ring clamp; 3-pressing the cover; 4-a second hold-down assembly; 5-a pressing shaft; 6-a first rectangular groove; 7-lower guard plate; 8-convex ring; 9-positioning the rod; 10-a positioning ring; 11-a first hold-down assembly; 12-a bolt; 13-a second rectangular slot; 14-upper guard plate; 15-positioning holes; 16-a guide sleeve; 17-a positioning sleeve; 18-a pressure ring; 19-a compression nut; 20-a casing; 21-inner ring; 22-blade.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, which is a structural schematic view of a fan casing, the fan casing includes an outer casing 20, an inner ring 21, and a plurality of blades 22 disposed between the casing 20 and the inner ring 21.
As shown in fig. 2 and 3, the electron beam welding protection device of the present invention includes a base 1, an inner ring fixture 2, and a gland 3 from bottom to top.
As shown in fig. 4, a plurality of second pressing components 4 are uniformly distributed on the top surface of the base 1 near the edge, and the fan casing and the base 1 are fixed by the second pressing components 4. The center of the base 1 is provided with a pressing shaft 5, the free end of the pressing shaft 5 is provided with an external thread, the external thread is connected with a pressing nut 19, and the pressing shaft 5 is used for determining that the pressing cover 3 is in the correct position in the base 1 and fixing the same. In this embodiment, a circular boss is arranged in the middle of the top surface of the base 1, and the inner ring clamp 2 is fixed on the boss.
As shown in fig. 5, the body of the inner ring clamp 2 is a circular disc with a circular hole in the middle, and a plurality of first rectangular grooves 6 are uniformly distributed on the top surface of the inner ring clamp 2 for one circle. As shown in fig. 6, a lower protection plate 7 is arranged in each first rectangular groove 6, the size of each first rectangular groove 6 needs to be in clearance fit with a lower boss of the lower protection plate 7, the fit clearance is guaranteed to be 0.01-0.05 mm, and the first rectangular grooves are fixed through screws and washers; the lower protection plates 7 are perpendicular to the top surface of the inner ring fixture 2, and the number of the lower protection plates 7 is the same as that of the blades 22 in the fan casing. As shown in FIG. 7, one side of the lower protection plate 7 is a joint surface, the shape of the joint surface is the same as that of the basin side of the blade 22, and the profile degree is 0.05 mm.
The top surface of the inner ring clamp 2 is provided with a positioning rod 9 perpendicular to the top surface, the positioning rod 9 is located at the eccentric position of the inner ring clamp 2, the center of the inner ring clamp 2 is provided with a convex ring 8, the diameter of the convex ring 8 is smaller than the diameter of an inner ring 21 of a fan case, a radial bolt 12 hole is formed in the inner circle of the convex ring 8, and a bolt 12 is arranged on the bolt 12 hole. 6-12 first pressing components 11 are uniformly distributed in the convex ring 8, and the first pressing components 11 are used for connecting and fixing the convex ring 8 and an inner ring 21 of the fan casing. A positioning ring 10 is arranged between the outer contour of the top of the inner ring clamp 2 and the convex ring 8, the positioning ring 10 is used for positioning the fan casing, the fan casing is prevented from being deformed and damaged in the welding process, and the positioning ring 10 is made of rubberized wood added with cloth.
As shown in fig. 8, the gland 3 body is a circular disk with a circular hole in the middle, and the bottom surface of the gland 3 is provided with a plurality of second rectangular grooves 13 uniformly distributed around the bottom surface. As shown in fig. 9, an upper protection plate 14 is arranged in each second rectangular groove 13, the size of each second rectangular groove 13 needs to be in clearance fit with an upper boss of the upper protection plate 14, the fit clearance is guaranteed to be 0.01-0.05 mm, the second rectangular grooves are fixed through screws and washers, and the position degree of each second rectangular groove 13 needs to be 0.05 mm; the upper protection plates 14 are vertical to the bottom surface of the gland 3, the number of the upper protection plates 14 is the same as that of the lower protection plates 7, and the distance between every two adjacent upper protection plates 14 is the same as that between every two adjacent lower protection plates 7; as shown in fig. 10, one side of the upper protection plate 14 is a joint surface, the joint surface of the upper protection plate 14 has the same shape as the back side of the vane 22, the bottom surface of the gland 3 is fastened on the top surface of the inner ring fixture 2, and the upper protection plate 14 and the lower protection plate 7 are arranged in a staggered manner.
The gland 3 is provided with a positioning hole 15 corresponding to the positioning rod 9, a guide sleeve 16 needs to be arranged in the positioning hole 15, the guide sleeve 16 is in interference fit with the positioning rod 9, and the positioning rod 9 and the positioning hole 15 are used for angular positioning of the gland 3 and the inner ring clamp 2 by adopting a tolerance p 6.
The middle round hole of gland 3 is provided with position sleeve 17, and position sleeve 17 is located gland 3 bottom surface, and position sleeve 17 and round hole interference fit adopt tolerance H7. The positioning sleeve 17 is in clearance fit with the pressing shaft 5, and the fit clearance is ensured to be 0.05 mm-0.10 mm. The length of the positioning sleeve 17 needs to be slightly larger, so that when the compressing shaft 5 and the positioning sleeve 17 start to be matched, a gap of 15 mm-20 mm is reserved between the upper protection plate 14 on the gland 3 and the highest point of the blade 22, and parts are prevented from being gouged.
The bottom surface of the gland 3 is provided with a ring of pressing ring 18, the pressing ring 18 is used for pressing a casing 20, the casing 20 is usually made of titanium alloy and is not allowed to contact with pollution materials such as copper and aluminum, the pressing ring 18 is made of 45 steel subjected to demagnetization treatment, and the pressing ring 18 is connected and fastened with the bottom surface of the gland 3 through 8-12 bolts 12.
In the embodiment, the lengths of the upper protection plate 14 and the lower protection plate 7 are both greater than the width of the blade 22, the materials of the upper protection plate 14 and the lower protection plate 7 are the same as those of the blade 22, and the upper protection plate 14 and the lower protection plate 7 are arranged close to the outer ring of the fan casing. The rest parts of the protection device are made of nonmagnetic materials.
During the use, install inner ring anchor clamps 2 on base 1 earlier, fix the fan machine casket on base 1 through second hold-down assembly 4 again, guarantee that lower guard plate 7 in the inner ring anchor clamps 2 is close to blade 22 basin side and sets up, and lower guard plate 7 and blade 22 basin side clearance are 0.10mm ~ 0.30mm, fix the bulge loop 8 and the fan machine casket inner ring 21 of inner ring anchor clamps 2 through first hold-down assembly 11. And covering the gland 3 on the inner ring fixture 2, ensuring that the upper protection plate 14 in the gland 3 is arranged close to the back side of the blade 22, ensuring that the gap between the lower protection plate 7 and the back side of the blade 22 is 0.10-0.30 mm, enabling the pressing shaft 5 on the base 1 to penetrate through the gland 3, fixing the gland 3 by using a pressing nut 19, and finishing the installation.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The electron beam welding protection device is characterized by comprising an inner ring clamp (2) and a gland (3);
the top surface of the inner ring clamp (2) is circular, a plurality of lower protection plates (7) are uniformly distributed on the top surface in a circle, the lower protection plates (7) are perpendicular to the top surface of the inner ring clamp (2), and the number of the lower protection plates (7) is the same as that of the blades (22) in the fan casing; one side of the lower protection plate (7) is a binding surface of the lower protection plate, and the binding surface of the lower protection plate (7) is the same as the shape of the basin side of the blade (22); the bottom surface of the gland (3) is circular, a plurality of upper protection plates (14) are uniformly distributed on the bottom surface for one circle, the upper protection plates (14) are vertical to the bottom surface of the gland (3), the number of the upper protection plates (14) is the same as that of the lower protection plates (7), and the distance between every two adjacent upper protection plates (14) is the same as that between every two adjacent lower protection plates (7); one side of the upper protection plate (14) is a binding surface of the upper protection plate, the binding surface of the upper protection plate (14) is the same as the shape of the back side of the blade (22), the bottom surface of the gland (3) is buckled on the top surface of the inner ring fixture (2), and the upper protection plate (14) and the lower protection plate (7) are arranged in a staggered mode.
2. The electron beam welding protection device according to claim 1, characterized in that the top surface of the inner ring fixture (2) is provided with a positioning rod (9) perpendicular to the top surface, and the gland (3) is provided with a positioning hole (15) corresponding to the positioning rod (9).
3. The electron beam welding protection device according to claim 1, characterized in that the inner ring clamp (2) is centrally provided with a protruding ring (8), the diameter of the protruding ring (8) is smaller than the diameter of the inner ring (21) of the fan casing, the inner circle of the protruding ring (8) is provided with radial bolt (12) holes, and the bolt (12) holes are provided with bolts (12).
4. The electron beam welding protection device according to claim 3, characterized in that a plurality of first pressing assemblies (11) are uniformly distributed in the convex ring (8), and the first pressing assemblies (11) are used for connecting and fixing the convex ring (8) and the inner ring (21) of the fan casing.
5. The electron beam welding protection device according to claim 1, characterized in that a base (1) is arranged at the bottom of the inner ring clamp (2), a pressing shaft (5) is arranged at the center of the base (1), the pressing shaft (5) penetrates through the inner ring clamp (2) and the gland (3), an external thread is arranged at the free end of the pressing shaft (5), and the external thread is connected with a pressing nut (19).
6. The electron beam welding protection device according to claim 5, characterized in that a plurality of second pressing components (4) are uniformly distributed on the top surface of the base (1) near the edge, and the fan casing and the base (1) are fixed through the second pressing components (4).
7. The electron beam weld guard of claim 5, wherein all of the components are made of non-magnetic material.
8. The electron beam welding protection device according to claim 1, characterized in that after the gland (3) and the inner ring fixture (2) are fastened, the total width of the adjacent upper and lower shielding plates (14, 7) is smaller than the distance between the adjacent blades (22).
9. The electron beam welding shield according to claim 1, wherein the surface of the blade (22) is spaced from the upper shield plate (14) or the lower shield plate (7) by 0.10mm to 0.30 mm.
10. The electron beam welding shield according to claim 1, wherein the upper shield plate (14) and the lower shield plate (7) each have a length greater than the width of the blade (22).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202011052893.6A CN112192125B (en) | 2020-09-29 | 2020-09-29 | Electron beam welding protector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202011052893.6A CN112192125B (en) | 2020-09-29 | 2020-09-29 | Electron beam welding protector |
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CN112192125A CN112192125A (en) | 2021-01-08 |
CN112192125B true CN112192125B (en) | 2022-02-11 |
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CN202011052893.6A Active CN112192125B (en) | 2020-09-29 | 2020-09-29 | Electron beam welding protector |
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Families Citing this family (1)
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CN113894400B (en) * | 2021-09-29 | 2023-03-14 | 中国航发成都发动机有限公司 | Electron beam welding device for stator assembly of aero-engine and clamping method thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2132512A (en) * | 1982-12-24 | 1984-07-11 | Rolls Royce | Welded stator vane assemblies for turbomachines |
US5383593A (en) * | 1992-11-04 | 1995-01-24 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" | Method for weld-assembling a disk fitted with small wings by an energy beam |
CN104439730A (en) * | 2014-11-10 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Fan casing assembly welding method and tool for fan casing assembly welding method |
CN109202254A (en) * | 2018-03-13 | 2019-01-15 | 中国航空制造技术研究院 | A kind of electro-beam welding method of the intensive rectangle girth joint of outer ring surface |
CN111633368A (en) * | 2020-06-11 | 2020-09-08 | 中国航发航空科技股份有限公司 | Welding and heat treatment integrated tool clamp for bearing frame and assembling method thereof |
-
2020
- 2020-09-29 CN CN202011052893.6A patent/CN112192125B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2132512A (en) * | 1982-12-24 | 1984-07-11 | Rolls Royce | Welded stator vane assemblies for turbomachines |
US5383593A (en) * | 1992-11-04 | 1995-01-24 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" | Method for weld-assembling a disk fitted with small wings by an energy beam |
CN104439730A (en) * | 2014-11-10 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Fan casing assembly welding method and tool for fan casing assembly welding method |
CN109202254A (en) * | 2018-03-13 | 2019-01-15 | 中国航空制造技术研究院 | A kind of electro-beam welding method of the intensive rectangle girth joint of outer ring surface |
CN111633368A (en) * | 2020-06-11 | 2020-09-08 | 中国航发航空科技股份有限公司 | Welding and heat treatment integrated tool clamp for bearing frame and assembling method thereof |
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Effective date of registration: 20240528 Address after: 710000, Room 401, 4th Floor, Building 7, Dapu Industrial Park, No. 4955 Shangyuan Road, Economic Development Zone, Xi'an City, Shaanxi Province Patentee after: XI'AN Xaec Suntimes HIGH-TECH Co.,Ltd. Country or region after: China Address before: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee before: AECC AVIATION POWER CO,LTD. Country or region before: China |