CN111822892A - Tool clamp for laser welding of C-shaped thin-wall part and using method thereof - Google Patents

Tool clamp for laser welding of C-shaped thin-wall part and using method thereof Download PDF

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Publication number
CN111822892A
CN111822892A CN202010721890.0A CN202010721890A CN111822892A CN 111822892 A CN111822892 A CN 111822892A CN 202010721890 A CN202010721890 A CN 202010721890A CN 111822892 A CN111822892 A CN 111822892A
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China
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shaped thin
wall part
block
locking
connecting rod
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CN202010721890.0A
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CN111822892B (en
Inventor
谢吉林
陈玉华
张体明
王善林
黄永德
胡锦扬
阳纯杨
刘文阔
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Digital Intelligence Holdings Ltd
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Nanchang Hangkong University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70Auxiliary operations or equipment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20Bonding
    • B23K26/21Bonding by welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70Auxiliary operations or equipment
    • B23K26/702Auxiliary equipment

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention discloses a tooling fixture for laser welding of a C-shaped thin-wall part and a use method thereof, and relates to the technical field of welding of the C-shaped thin-wall part.

Description

Tool clamp for laser welding of C-shaped thin-wall part and using method thereof
Technical Field
The invention relates to the technical field of welding of C-shaped thin-wall parts, in particular to a tool clamp for laser welding of C-shaped thin-wall parts and a using method thereof.
Background
The pulse laser micro-welding has the advantages of high energy density, easy realization of accurate control, high welding efficiency, narrow welding line, small welding deformation and the like, and is widely applied to the filler-free butt welding of ultrathin parts. The thin-wall part with the C-shaped cross section is a part widely applied in the field of mechanical sealing, and is characterized in that the cross section is C-shaped, the wall thickness is thin, the whole part is annular, for example, a C-shaped metal sealing ring, the welding line is in a spatial arc butt joint mode, and the following welding difficulties mainly exist in the welding process:
firstly, the thickness of a part to be welded is thin, usually only 0.1mm-0.2mm, high-precision clamping and positioning cannot be realized only by clamping and positioning a female die in the laser welding process, and the defects of welding seam misalignment and burn-through are easily generated;
secondly, the back of the weld lacks protection, and back oxidation easily occurs to generate weld oxide inclusion defects.
Therefore, how to provide a tooling fixture for laser welding of C-shaped thin-walled parts, which is not easy to have misaligned, burn-through and oxidize, is a problem to be solved by those skilled in the art.
Disclosure of Invention
In order to solve the technical problems, the invention provides a tool clamp for laser welding of a C-shaped thin-wall part, and a use method thereof, wherein welding seams are not easy to stagger, burn through and oxidize.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a tool clamp for laser welding of a C-shaped thin-wall part, which comprises: a frame body; the rotating assembly comprises a rotating table and a female die, the rotating table is rotatably arranged on the frame body, the rotating table is provided with a concave part matched with the female die in shape, the female die is arranged in the concave part, and the female die is provided with a circular groove for accommodating the C-shaped thin-walled part; the power device is in transmission connection with the rotating platform so as to drive the rotating platform to rotate; the pressing assembly comprises a plurality of pressing devices, the pressing devices are arranged along the circumferential direction of the female die and are connected with the rotating table, and the first ends of the pressing devices are arranged above the female die and the circular groove to press the female die and the C-shaped thin-walled part; the flexible clamp comprises a central rod, a sliding block, a locking device and a plurality of connecting rod assemblies, the sliding block is slidably sleeved on the central rod, the connecting rod assemblies are arranged along the circumferential direction of the central rod, each connecting rod assembly comprises a first connecting rod, a second connecting rod and a jacking block used for jacking the C-shaped thin-walled part tightly against the side wall of the circular groove, the first end of the first connecting rod and the first end of the second connecting rod are hinged with the jacking blocks, the second end of the first connecting rod is hinged with the sliding block, the second end of the second connecting rod is hinged with the central rod, the second end of the first connecting rod and the second end of the second connecting rod are arranged up and down along the axis of the central rod, the locking device is arranged on the central rod, and the locking device can unlock or lock the sliding block, the top block is provided with a vent hole, and the vent hole is used for conveying protective gas to the interior of the C-shaped thin-wall part.
Preferably, the pressing device comprises a pressing block and a first spring, the pressing block is hinged to the rotating table, a first end of the pressing block extends to the position above the circular groove, and a second end of the pressing block is connected with the opposite surface of the rotating table through the first spring.
Preferably, the first end of the pressing block is provided with a slope.
Preferably, the locking device comprises a second spring and a locking block, a locking hole is formed in the center rod, the second spring is arranged in the locking hole, the locking block is connected with the second spring, the locking block is partially embedded into the locking hole in a locking state, and the locking block is completely embedded into the locking hole in an unlocking state.
Preferably, one surface of the top block, which is close to the C-shaped thin-wall part, is a curved surface, and the radian of the curved surface is consistent with that of the inner side wall of the C-shaped thin-wall part.
Preferably, the power device is a motor.
Preferably, the support body includes bottom plate and riser, the one end perpendicular to of riser the bottom plate with bottom plate fixed connection, the revolving stage rotationally set up in on the riser.
The invention also provides a use method of the tool clamp for laser welding of the C-shaped thin-wall part, which comprises the following steps: step one, placing the C-shaped thin-wall part in the circular groove, and enabling the pressing device to press the C-shaped thin-wall part; secondly, placing the flexible clamp in the circular groove, unlocking the sliding block by the locking device, and sliding the sliding block until the top block abuts against the inner side wall of the C-shaped thin-wall part, wherein the sliding block is locked by the locking device; driving the rotating table to rotate by the power device, starting welding the C-shaped thin-wall part, and conveying shielding gas to the interior of the C-shaped thin-wall part through the vent hole during welding; and fourthly, after welding is finished, unlocking the sliding block again by the locking device, sliding the sliding block again, taking out the flexible clamp from the circular groove when the top block of the flexible clamp is separated from the inner side wall of the C-shaped thin-wall part, simultaneously loosening the C-shaped thin-wall part by the pressing device, and then taking out the C-shaped thin-wall part from the circular groove.
Compared with the prior art, the invention has the following technical effects:
1. according to the tool clamp for laser welding of the C-shaped thin-wall part and the using method thereof, the positioning of the C-shaped thin-wall part is realized through the matching of the female die, the pressing device and the flexible clamp, compared with the method of positioning only by adopting the female die, the positioning precision of the tool clamp for laser welding of the C-shaped thin-wall part and the using method thereof is greatly improved, and the situations of welding seam misalignment and burning-through are effectively avoided;
2. according to the tool clamp for laser welding of the C-shaped thin-wall part and the using method thereof, the protective gas is introduced to the back of the C-shaped thin-wall part through the vent hole in the welding process, the protective gas protects the back of the welding seam, and the welding seam oxidation condition is effectively avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a tooling fixture for laser welding of a C-shaped thin-wall part, provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a flexible fixture provided in an embodiment of the present invention.
Description of reference numerals: 1. a rotating table; 2. a female die; 3. a circular groove; 4. a center pole; 5. a slider; 6. a first link; 7. a second link; 8. a top block; 9. briquetting; 10. a slope; 11. a second spring; 12. a locking block; 13. a power plant; 14. a base plate; 15. a vertical plate; 16. c type thin wall part.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a tool clamp for laser welding of a C-shaped thin-wall part, which is not easy to stagger, burn through and oxidize a welding seam, and a using method thereof.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-2, the present embodiment provides a tooling fixture for laser welding of C-shaped thin-walled parts, including: a frame body; the rotating assembly comprises a rotating table 1 and a female die 2, the rotating table 1 is rotatably arranged on the frame body, the rotating table 1 is provided with a concave part matched with the female die 2 in shape, the female die 2 is arranged in the concave part, and the female die 2 is provided with a circular groove 3 for accommodating a C-shaped thin-walled part 16; the power device 13 is in transmission connection with the rotating platform 1 to drive the rotating platform 1 to rotate, so that matching welding among different welding parameters is realized; the pressing assembly comprises a plurality of pressing devices, the pressing devices are arranged along the circumferential direction of the female die 2 and are connected with the rotating table 1, and the first ends of the pressing devices are arranged above the female die 2 and the circular groove 3 so as to press the female die 2 and the C-shaped thin-wall part 16; the flexible clamp comprises a central rod 4, a sliding block 5, a locking device and a plurality of connecting rod assemblies, wherein the sliding block 5 is slidably sleeved on the central rod 4, the connecting rod assemblies are arranged along the circumferential direction of the central rod 4, each connecting rod assembly comprises a first connecting rod 6, a second connecting rod 7 and a jacking block 8 for jacking a C-shaped thin-wall part 16 tightly against the side wall of the circular groove 3, the first end of the first connecting rod 6 and the first end of the second connecting rod 7 are hinged with the jacking blocks 8, the second end of the first connecting rod 6 is hinged with the sliding block 5, the second end of the second connecting rod 7 is hinged with the central rod 4, and the second end of the first connecting rod 6 and the second end of the second connecting rod 7 are arranged up and down along the axis of the central rod 4, the locking device is arranged on the central rod 4, the locking device can unlock or lock the sliding block 5, the top block 8 is provided with a vent hole, and the vent hole is used for conveying shielding gas to the inside of the C-shaped thin-wall part 16. The clamping tool for the laser welding of the C-shaped thin-wall part is compact and simple in structure, free of complex mechanisms and electrical control equipment, convenient to operate and high in adaptability, and can be used for realizing precise assembly, reducing misalignment and improving welding quality. The tool clamp for laser welding of the C-shaped thin-wall part can effectively solve the problems that ultrathin weak-rigidity annular parts of 0.1mm and 0.2mm are easy to deform and have staggered edges and no protection on the back surface during welding, and realizes defect-free welding of the weak-rigidity annular parts.
In this embodiment, closing device includes briquetting 9 and first spring, and briquetting 9 is connected with revolving stage 1 is articulated, and the first end of briquetting 9 extends to circular recess 3 top, and the second end of briquetting 9 and revolving stage 1 the two relative faces pass through first spring coupling, and the first end of first spring links to each other with the second end of briquetting 9, and the second end of first spring links to each other with revolving stage 1. So arranged, the pressing device can conveniently loosen and press the C-shaped thin-wall part 16. The hinge joint position of the pressing block 9 and the rotating table 1 serves as a fulcrum in a specific using process, an upward acting force is applied to the first end of the pressing block 9 by the first spring in a pressing state, at the moment, a downward acting force is correspondingly applied to the C-shaped thin-wall part 16 by the second end of the pressing block 9 so as to press the C-shaped thin-wall part 16, when the C-shaped thin-wall part 16 needs to be taken out, the first end of the pressing block 9 is shifted upwards, the first end of the pressing block 9 is separated from the C-shaped thin-wall part 16, and the C-shaped thin-wall part 16 can be conveniently taken.
In the present embodiment, as shown in fig. 1, in order to increase the operation space between the pressing piece 9 and the central rod 4, the first end of the pressing piece 9 is provided with a slope 10.
In this embodiment, in order to conveniently and quickly realize the locking and unlocking of the slider 5, as shown in fig. 2, the locking device includes a second spring 11 and a locking block 12, a locking hole is formed in the center rod 4, the second spring 11 is disposed in the locking hole, the locking block 12 is connected to the second spring 11, a first end of the second spring 11 is connected to the bottom of the locking hole, a second end of the second spring 11 is connected to the locking block 12, when the locking state is performed, the locking block 12 is partially embedded into the locking hole, and when the unlocking state is performed, the locking block 12 is completely embedded into the locking hole. In the specific use process, a user can conveniently and quickly realize the locking and unlocking of the sliding block 5 by pressing the locking block 12. In addition, the position of the locking device on the central rod 4 is set as required, in this embodiment, when the top block 8 abuts against the inner side wall of the C-shaped thin-walled part 16, the locking block 12 is just above the slider 5, and the bottom end of the locking block 12 abuts against the top end of the slider 5, so as to limit the slider 5 to move upwards continuously. When the locking block 12 is pressed and the locking block 12 is completely inserted into the locking hole, the sliding block 5 is out of the limit and can freely slide.
In the present embodiment, in order to avoid losing the inner sidewall of the C-shaped thin-walled part 16, as shown in fig. 2, one surface of the top block 8 close to the C-shaped thin-walled part 16 is a curved surface, and the radian of the curved surface is consistent with the radian of the inner sidewall of the C-shaped thin-walled part 16.
In the present embodiment, specifically, the power device 13 is a motor; the support body includes bottom plate 14 and riser 15, refers to fig. 1, and the one end perpendicular to bottom plate 14 of riser 15 and with bottom plate 14 fixed connection, revolving stage 1 rotationally sets up on riser 15, and the output shaft of motor is connected with revolving stage 1 to drive revolving stage 1 rotates.
In the present embodiment, specifically, as shown in fig. 2, the first end of the first link 6 and the first end of the second link 7 are both hinged to the same position of the top block 8, and the specific number of link assemblies is determined according to actual requirements.
In this embodiment, the shielding gas is argon.
The embodiment also provides a use method of the tool clamp for laser welding of the C-shaped thin-wall part, which comprises the following steps:
the method comprises the following steps that firstly, the surface of a female die 2 is taken as a reference, a C-shaped thin-wall part 16 is placed in a circular groove 3, the C-shaped thin-wall part 16 is attached and pressed by a pressing block 9, the circumferential direction of the C-shaped thin-wall part 16 is ensured to be in the same plane, and the circumferential direction of the part is ensured to be in the same horizontal plane through the manufacturing precision of the female die 2;
secondly, the flexible clamp is positioned in the circular groove 3, the locking device unlocks the sliding block 5, the sliding block 5 slides, until the top block 8 abuts against the inner side wall of the C-shaped thin-wall part 16, the locking device locks the sliding block 5 (when the sliding block 5 slides over the locking block 12, the locking block 12 bounces under the action of the second spring 11 to clamp the sliding block 5), the flexible clamp is in contact with the inner surface of the C-shaped thin-wall part 16 in a multi-point contact mode, the C-shaped thin-wall part 16 is attached to and compacted with the female die 2, the radial roundness size of the C-shaped thin-wall part 16 is ensured to meet requirements, and the fault-free clamping of a contact surface to be welded is;
thirdly, the power device 13 drives the rotating platform 1 to rotate, the welding of the C-shaped thin-wall part 16 is started, the matching welding among different welding parameters is realized by adjusting the rotating speed of the rotating platform 1, and the vent hole conveys shielding gas to the inside of the C-shaped thin-wall part 16 during welding;
and step four, after welding is finished, unlocking the sliding block 5 again by the locking device, sliding the sliding block 5 again, taking out the flexible fixture from the circular groove 3 when the top block 8 of the flexible fixture is separated from the inner side wall of the C-shaped thin-wall part 16, simultaneously loosening the C-shaped thin-wall part 16 by the pressing device, and then taking out the C-shaped thin-wall part 16 from the circular groove 3.
This frock clamp for laser welding of C type thin wall part can effectively avoid the problem that thin wall weak rigidity annular part assembly and welding process appear before welding, improves the quality of assembly efficiency before welding and welded joint. The clamping tool for the laser welding of the C-shaped thin-wall parts is compact in structure, simple and convenient to operate, high in assembly precision, reliable in clamping and high in universality, and can be suitable for clamping thin-wall weak-rigidity annular parts of different sizes and shapes before welding by replacing the female die 2.
It should be noted that the tool clamp for laser welding of the C-shaped thin-walled part provided by the invention is mainly suitable for laser welding of the C-shaped metal sealing ring, but is not limited to laser welding of the C-shaped metal sealing ring, and is also suitable for laser welding of other C-shaped thin-walled parts 16; the female die 2 refers to a split die with a concave die cavity, and the middle cavity of the female die 2 is a circular groove 3.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (8)

1. The utility model provides a frock clamp for C type thin wall part laser welding which characterized in that includes:
a frame body;
the rotating assembly comprises a rotating table and a female die, the rotating table is rotatably arranged on the frame body, the rotating table is provided with a concave part matched with the female die in shape, the female die is arranged in the concave part, and the female die is provided with a circular groove for accommodating the C-shaped thin-walled part;
the power device is in transmission connection with the rotating platform so as to drive the rotating platform to rotate;
the pressing assembly comprises a plurality of pressing devices, the pressing devices are arranged along the circumferential direction of the female die and are connected with the rotating table, and the first ends of the pressing devices are arranged above the female die and the circular groove to press the female die and the C-shaped thin-walled part;
the flexible clamp comprises a central rod, a sliding block, a locking device and a plurality of connecting rod assemblies, the sliding block is slidably sleeved on the central rod, the connecting rod assemblies are arranged along the circumferential direction of the central rod, each connecting rod assembly comprises a first connecting rod, a second connecting rod and a jacking block used for jacking the C-shaped thin-walled part tightly against the side wall of the circular groove, the first end of the first connecting rod and the first end of the second connecting rod are hinged with the jacking blocks, the second end of the first connecting rod is hinged with the sliding block, the second end of the second connecting rod is hinged with the central rod, the second end of the first connecting rod and the second end of the second connecting rod are arranged up and down along the axis of the central rod, the locking device is arranged on the central rod, and the locking device can unlock or lock the sliding block, the top block is provided with a vent hole, and the vent hole is used for conveying protective gas to the interior of the C-shaped thin-wall part.
2. The tooling fixture for laser welding of the C-shaped thin-walled parts as claimed in claim 1, wherein the pressing device comprises a pressing block and a first spring, the pressing block is hinged to the rotating table, a first end of the pressing block extends above the circular groove, and a second end of the pressing block is connected to a surface of the rotating table opposite to the first end of the pressing block through the first spring.
3. The tool clamp for laser welding of the C-shaped thin-walled part as claimed in claim 2, wherein a slope is provided at a first end of the pressing block.
4. The tooling fixture for laser welding of the C-shaped thin-walled part according to claim 1, wherein the locking device comprises a second spring and a locking block, a locking hole is formed in the center rod, the second spring is arranged in the locking hole, the locking block is connected with the second spring, the locking block is partially embedded into the locking hole in a locking state, and the locking block is completely embedded into the locking hole in an unlocking state.
5. The tool clamp for laser welding of the C-shaped thin-wall part according to claim 1, wherein one surface, close to the C-shaped thin-wall part, of the top block is a curved surface, and the radian of the curved surface is consistent with that of the inner side wall of the C-shaped thin-wall part.
6. The tool clamp for laser welding of the C-shaped thin-walled parts as claimed in claim 1, wherein the power device is a motor.
7. The tooling fixture for laser welding of the C-shaped thin-walled parts according to claim 1, wherein the frame body comprises a bottom plate and a vertical plate, one end of the vertical plate is perpendicular to the bottom plate and is fixedly connected with the bottom plate, and the rotating table is rotatably arranged on the vertical plate.
8. The use method of the tool clamp for laser welding of the C-shaped thin-walled part as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
step one, placing the C-shaped thin-wall part in the circular groove, and enabling the pressing device to press the C-shaped thin-wall part;
secondly, placing the flexible clamp in the circular groove, unlocking the sliding block by the locking device, and sliding the sliding block until the top block abuts against the inner side wall of the C-shaped thin-wall part, wherein the sliding block is locked by the locking device;
driving the rotating table to rotate by the power device, starting welding the C-shaped thin-wall part, and conveying shielding gas to the interior of the C-shaped thin-wall part through the vent hole during welding;
and fourthly, after welding is finished, unlocking the sliding block again by the locking device, sliding the sliding block again, taking out the flexible clamp from the circular groove when the top block of the flexible clamp is separated from the inner side wall of the C-shaped thin-wall part, simultaneously loosening the C-shaped thin-wall part by the pressing device, and then taking out the C-shaped thin-wall part from the circular groove.
CN202010721890.0A 2020-07-24 2020-07-24 Tool clamp for laser welding of C-shaped thin-wall part and using method thereof Active CN111822892B (en)

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CN202010721890.0A CN111822892B (en) 2020-07-24 2020-07-24 Tool clamp for laser welding of C-shaped thin-wall part and using method thereof

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CN109128645A (en) * 2018-09-25 2019-01-04 中国航空制造技术研究院 A kind of the laser welding clamping and positioning device and method of curve cylinder class formation
CN109277841A (en) * 2018-09-22 2019-01-29 中船澄西船舶修造有限公司 A kind of thin-wall tube inner support tooling
CN209424836U (en) * 2019-01-22 2019-09-24 河南科创数控机械有限公司 A kind of Cylinder shape constructional element girth welding inner support clamp

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202985151U (en) * 2012-12-20 2013-06-12 贵州航天乌江机电设备有限责任公司 Tool for processing thin-wall ring-shaped work pieces
US20170014948A1 (en) * 2015-07-17 2017-01-19 Shanghai Seeyao Electronics Co., Ltd. Process and device for simultaneous laser welding
CN105904091A (en) * 2016-06-30 2016-08-31 天津成立航空技术有限公司 Engine fastener tool clamp for laser welding and clamping method of engine fastener tool clamp
CN206305623U (en) * 2016-09-27 2017-07-07 莆田学院 A kind of thin cylinder crack laser is repaiied and covers anti-deformation fixture
CN106425273A (en) * 2016-12-23 2017-02-22 贵州黎阳航空动力有限公司 Annular welding seam supporting clamp used for thin-wall cylindrical part machining
CN107160025A (en) * 2017-05-15 2017-09-15 中国船舶重工集团公司第七二五研究所 A kind of thin-wall barrel high energy beam precision welding manufacture method
CN108838534A (en) * 2018-07-23 2018-11-20 中国航空制造技术研究院 A kind of aluminium alloy sliding rail sleeve laser soldering device and method
CN109277841A (en) * 2018-09-22 2019-01-29 中船澄西船舶修造有限公司 A kind of thin-wall tube inner support tooling
CN109128645A (en) * 2018-09-25 2019-01-04 中国航空制造技术研究院 A kind of the laser welding clamping and positioning device and method of curve cylinder class formation
CN209424836U (en) * 2019-01-22 2019-09-24 河南科创数控机械有限公司 A kind of Cylinder shape constructional element girth welding inner support clamp

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CN111822892B (en) 2021-09-10

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Effective date of registration: 20220523

Address after: 1938, building A2, No. 2009, Lihu Avenue, Wuxi City, Jiangsu Province, 214000

Patentee after: Digital intelligence Holdings Ltd.

Address before: 330063 No. 696 Feng Nan Road, Jiangxi, Nanchang

Patentee before: NANCHANG HANGKONG University