CN110315358B - Low-pressure turbine guide blade clamping mechanism and clamping method - Google Patents
Low-pressure turbine guide blade clamping mechanism and clamping method Download PDFInfo
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- CN110315358B CN110315358B CN201910543800.0A CN201910543800A CN110315358B CN 110315358 B CN110315358 B CN 110315358B CN 201910543800 A CN201910543800 A CN 201910543800A CN 110315358 B CN110315358 B CN 110315358B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000003825 pressing Methods 0.000 claims abstract description 80
- -1 polytetrafluoroethylene Polymers 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
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Abstract
The invention relates to a clamping mechanism and a clamping method for guide vanes of a low-pressure turbine, which comprises a base, wherein the upper surface of the base is provided with a plurality of positioning blocks, positioning pins, a jacking mechanism and a shape following pressing mechanism, the positioning blocks are arranged on the right side and the front side of the base, the positioning pins are arranged on the left side and the right side of the base, the jacking mechanism is arranged on the left side of the base, the shape following pressing mechanism is arranged in the middle of the base, the shape following pressing mechanism comprises a pressing base, the pressing base is fixedly connected to the upper surface of the base and extends upwards, a pressing block is arranged above the pressing base, a through hole is formed in the pressing block, a threaded hole is formed in the upper surface of the pressing base, and the pressing block and the pressing base are connected; the invention aims to solve the problems that the conventional guide vane of a low-pressure turbine needs to be clamped for multiple times during processing, wastes time and labor, generates reference conversion and influences the processing precision of parts.
Description
Technical Field
The invention belongs to the field of manufacturing of guide blades of an aircraft engine wheel, and particularly relates to a clamping mechanism and a clamping method for guide blades of a low-pressure turbine.
Background
Turbine guide vanes are important components of the turbine section of a turbine engine. The blades rotating at high speed are responsible for drawing high-temperature and high-pressure airflow into the combustor to maintain the operation of the engine. The guide vane of the low-pressure turbine usually adopts a multi-connection structure, the common structure is 4-6 vane groups, the radial span of a vane body is large, the chord length is short, and the integral structure of parts is long, wide and flat. The blade body of the turbine guide blade is subjected to zero-allowance precision casting, and various mounting matching surfaces of parts need to be machined.
Current low pressure turbine guide vane is when processing both end faces, generally adopts bridge structure anchor clamps, spanes whole blade, and an terminal surface of blade is got to anchor clamps clamp, processes another terminal surface, treats to add the good back of processing, gets the terminal surface of processing again to press from both sides, processes the unprocessed terminal surface of the other end, and this kind of clamping mode need carry out twice clamping to the blade when processing the terminal surface, and troublesome poeration, waste time and energy, the work load that increases blade processing to can produce the benchmark conversion, influence the part machining precision.
Disclosure of Invention
The invention provides a clamping mechanism and a clamping method for a guide blade of a low-pressure turbine, and aims to solve the problems that the guide blade of the low-pressure turbine needs to be clamped for multiple times during processing, time and labor are wasted, reference conversion can be generated, and the processing precision of parts is influenced.
The embodiment of the invention provides a clamping mechanism and a clamping method for a guide blade of a low-pressure turbine, which comprises a base, wherein the upper surface of the base is provided with a plurality of positioning blocks, positioning pins, a jacking mechanism and a shape following pressing mechanism; the tight mechanism in top includes the knock pin, set up porose A on the base, the knock pin passes hole A and upwards extends, hole A's below processing has the internal thread, and its inside threaded connection has the plug screw, the plug screw upper surface with install the pressure spring between the bottom of knock pin, the outside cover in top of knock pin is equipped with the connecting block, connecting block fixed connection in on the base, set up the hole B of vertical direction on the connecting block, hole B is the through-hole, the knock pin suit in inside hole B, the side of connecting block seted up with hole B looks vertically hole C, hole C communicates with each other with hole B, hole C is the screw hole, hole C's internal thread is connected with screw C.
Preferably, the shape following pressing mechanism comprises a pressing base, the pressing base is fixedly connected to the upper surface of the base and extends upwards, a pressing block is mounted above the pressing base, a through hole is formed in the pressing block, a threaded hole is formed in the upper surface of the pressing base, a hexagonal bolt penetrates through the through hole and the threaded hole, and the pressing block is connected with the pressing base through the hexagonal bolt.
Preferably, a gasket is bonded to the lower surface of the pressing block, and the gasket is made of polytetrafluoroethylene.
Preferably, a positioning mechanism is fixedly connected below the base.
Preferably, the positioning block is fixedly connected to the base through a pin and a screw a.
Preferably, the number of the positioning blocks is at least three.
Preferably, the number of the positioning pins is at least three.
Preferably, the number of the jacking mechanism and the form-following pressing mechanism is at least two respectively.
A clamping method using the low-pressure turbine guide vane clamping mechanism comprises the following steps:
A. before the guide vane of the low-pressure turbine is installed, the ejector pin is pressed down, and a screw C is locked;
B. the guide vane of the low-pressure turbine is placed on the base, each positioning point of the vane is in contact with each positioning block and each positioning pin, and each pressing base arranged on the base penetrates out of a yielding groove formed in the vane;
C. placing the pressing block above the pressing base, and pre-tightening the hexagon bolt;
D. loosening the screw C, and jacking the jacking pin upwards under the action of the pressure spring to be in contact with the blade;
E. locking the screw C;
F. locking a hexagon bolt;
G. and (3) checking the fitting condition of each positioning point of the blade with the positioning block and the positioning pin by using a 0.03mm feeler gauge, determining that the blade is clamped in place, and finishing the blade clamping.
The technical scheme provided by the application at least has the following technical effects:
1. the invention comprises the technical scheme that the upper surface of a base is provided with a plurality of positioning blocks, positioning pins, a jacking mechanism and a conformal pressing mechanism, the conformal pressing mechanism comprises a pressing base, the pressing base is fixedly connected with the upper surface of the base and extends upwards, a pressing block is arranged above the pressing base, and the pressing block and the pressing base are connected through a hexagon bolt, the conformal pressing mechanism is arranged on the base, so that the pressing base in the conformal pressing mechanism passes through a abdicating groove on a blade and extends upwards, when the blade needs to be clamped, the pressing block is only required to be buckled above the pressing base and pressed by the hexagon bolt, thereby realizing the rapid clamping of the blade, exposing the processing area of the blade to the maximum extent, processing all processing surfaces only by one-time clamping, and reducing the labor intensity, meanwhile, the conversion frequency of the blade processing reference is reduced, and the processing precision of the blade is enhanced.
2. The invention comprises the technical scheme that a plurality of jacking mechanisms are arranged on the upper surface of a base, each jacking mechanism comprises a jacking pin, a hole A is formed in the base, the jacking pin penetrates through the hole A and extends upwards, an internal thread is processed below the hole A, a screw plug is connected with the internal thread of the hole A, a pressure spring is arranged between the upper surface of the screw plug and the bottom of the jacking pin, a connecting block is sleeved outside the upper part of the jacking pin and is fixedly connected to the base, a hole B in the vertical direction is formed in the connecting block, the hole B is a through hole, the jacking pin is sleeved inside the hole B, a hole C perpendicular to the hole B is formed in the side surface of the connecting block and is communicated with the hole B, the hole C is a threaded hole, and the internal thread of the hole C is connected with a screw C', and the jacking mechanisms are arranged on the base, when carrying out the clamping to the blade, only need loosen screw C, the knock pin alright jack-up that makes progress under the effect of pressure spring, with blade bottom in close contact with, locking screw C again, can fix the knock pin, because it is blank to treat to process the blade, has certain precision error, the bottom surface unevenness, the mode that uses the knock pin jack-up that makes progress can make the knock pin contact with the blade bottom all the time to avoid the blade because unevenness and bottom sprag mechanism produce the clearance, and the unstable problem of location that leads to.
3. According to the technical scheme, the gasket is bonded on the lower surface of the pressing block and is made of polytetrafluoroethylene, and the blade is pressed by the polytetrafluoroethylene, so that the pressing block is prevented from being in direct hard contact with the blade, the damage of clamping on the surface of the blade is reduced, and the blade is protected.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a sectional view taken along line A-A in FIG. 1;
FIG. 4 is a sectional view taken along line B-B of FIG. 1;
in the figure, 1, a base, 2, a positioning mechanism, 3, a positioning block, 4, a pin, 5, a screw A.6, a positioning pin, 11, a low-pressure turbine guide vane, 12, a jacking mechanism, 13, a pressing block, 14, a gasket, 15, a hexagon bolt, 16, a conformal pressing mechanism, 17, a pressing base, 18, a screw B, 19, a jacking pin, 20, a screw C, 21, a screw plug, 22, a pressure spring, 23, a connecting block, 24, a screw D,25, a hole A, 26, a hole B, 27 and a hole C are arranged.
Detailed Description
The embodiment of the invention provides a clamping mechanism and a clamping method for a guide blade of a low-pressure turbine, and aims to solve the problems that the guide blade of the low-pressure turbine needs to be clamped for multiple times during processing, time and labor are wasted, reference conversion can be generated, and the processing precision of parts is influenced.
According to the invention, the shape following pressing mechanism 16 is arranged on the base 1, so that the pressing base 17 in the shape following pressing mechanism 16 passes through the abdicating groove on the blade and extends upwards, when the blade needs to be clamped, only the pressing block 13 is required to be buckled above the pressing base 17 and pressed by the hexagon bolt 15, thus the rapid clamping of the blade can be realized, the processing area of the blade can be exposed to the maximum extent, all processing surfaces can be processed only by one-time clamping, the labor intensity of workers is reduced, the conversion times of the blade processing datum are reduced, and the processing precision of the blade is enhanced.
According to the invention, the jacking mechanism 12 is arranged on the base 1, when the blade is clamped, only the screw C20 needs to be loosened, the jacking pin 19 can be jacked upwards under the action of the pressure spring 22 and is tightly contacted with the bottom of the blade, and then the screw C20 is locked, so that the jacking pin 19 can be fixed.
According to the invention, the gasket 14 made of polytetrafluoroethylene is bonded on the lower surface of the pressing block 13, and the blade is pressed tightly by using the polytetrafluoroethylene, so that the pressing block 13 is prevented from being in direct hard contact with the blade, the damage of clamping on the surface of the blade is reduced, and the blade is protected.
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the technical solutions of the present invention are provided with reference to the accompanying drawings and examples:
the embodiment of the invention provides a clamping mechanism and a clamping method for a low-pressure turbine guide vane, as shown in fig. 1 and fig. 2, the clamping mechanism mainly comprises a base 1, three positioning blocks 3, three positioning pins 6, two groups of jacking mechanisms 12 and two groups of conformal pressing mechanisms 16 are arranged on the upper surface of the base 1, the positioning blocks 3 are fixedly connected to the base 1 through pins 4 and screws A5, the positioning blocks 3 and the positioning pins 6 are both arranged on the positions of the positioning points of the low-pressure turbine guide vane 11 to be processed, wherein two positioning blocks 3 are arranged on the right side of the base 1 and are used as reference surfaces for placing the low-pressure turbine guide vane 11, and two positioning pins 6 are arranged on the right side of the base 1 and play a role of positioning reference, one positioning block 3 is arranged on the front side of the base 1 and is used for blocking the low-pressure turbine guide vane 11 to prevent the low-pressure turbine guide, the positioning pin 6 is arranged on the left side of the base 1 and used for preventing the guide vane 11 of the low-pressure turbine from moving towards the left side, the two groups of jacking mechanisms 12 are arranged on the left side of the base 1 and used for supporting the guide vane 11 of the low-pressure turbine, and the two groups of shape following pressing mechanisms 16 are arranged in the middle of the base 1 and used for clamping the guide vane 11 of the low-pressure turbine.
Specifically, as shown in fig. 4, the tightening mechanism 12 includes a knock pin 19, a hole a25 is provided on the base 1, the knock pin 19 passes through the hole a25 and extends upward, an internal thread is processed below the hole a25, a plug screw 21 is screwed in the hole a25, a pressure spring 22 is installed between the upper surface of the plug screw 21 and the bottom of the knock pin 19, and the knock pin 19 can be pushed up under the action of the pressure spring 22. The outside cover in top of knock pin 19 is equipped with connecting block 23, connecting block 23 pass through screw D24 fixed connection in on the base 1, set up vertical direction hole B26 on connecting block 23, hole B26 is the through-hole, knock pin 19 suit in hole B26 is inside, and can slide in hole B26. A hole C27 perpendicular to the hole B26 is formed in the side face of the connecting block 23, the hole C27 is communicated with the hole B26, the hole C27 is a threaded hole, a screw C20 is connected to the inner thread of the hole C27, and the screw C20 can tightly push the ejector pin 19 to fix the ejector pin 19. When the bottom support is needed to be provided for the low-pressure turbine guide vane 11, only the screw C20 needs to be loosened, the ejector pin 19 can be jacked upwards under the action of the pressure spring 22 and is in close contact with the bottom of the low-pressure turbine guide vane 11, then the screw C20 is locked, the ejector pin 19 can be fixed, the low-pressure turbine guide vane 11 to be processed is a blank, certain precision error exists, the bottom surface is uneven, the ejector pin 19 can be always in contact with the bottom of the low-pressure turbine guide vane 11 by using the mode that the ejector pin 19 is jacked upwards, and therefore the problem that the low-pressure turbine guide vane 11 is unstable in positioning due to the fact that the uneven bottom support mechanism generates a gap is avoided.
Specifically, as shown in fig. 3, the conformal compression mechanism 16 includes a compression base 17, and the compression base 17 is fixedly connected to the upper surface of the base 1 through a screw B18. A plurality of abdicating grooves are formed in the low-pressure turbine guide vane 11, and the pressing base 17 can penetrate the abdicating grooves formed in the low-pressure turbine guide vane 11 and extend upwards. A pressing block 13 is installed above the pressing base 17, a through hole is formed in the pressing block 13, a threaded hole is formed in the upper surface of the pressing base 17, a hexagon bolt 15 penetrates through the through hole and the threaded hole, and the pressing block 13 is connected with the pressing base 17 through the hexagon bolt 15. The hexagonal bolt 15 is locked, so that the pressing block 13 clamps the low-pressure turbine guide vane 11, and the processing area of the low-pressure turbine guide vane 11 is exposed to the maximum. The lower surface of briquetting 13 bonds there is gasket 14, the material of gasket 14 is polytetrafluoroethylene, compresses tightly the blade through utilizing polytetrafluoroethylene, can avoid briquetting 13 and direct hard contact of blade to reduce the damage of clamping to the blade surface, play the effect of protection blade.
Specifically, a positioning mechanism 2 is fixedly connected to the lower portion of the base 1, and the positioning mechanism 2 is an EROWA tray, and is available on the market, and the specific model of the EROWA tray is ER-015777. The positioning mechanism 2 is used for fixing the base 1 on the processing machine tool.
In use, prior to installation of the low pressure turbine guide vane 11, the knock pin 19 is first depressed and the screw C20 is locked. The guide vane 11 of the low-pressure turbine is placed on the base 1, each positioning point of the vane is contacted with each positioning block 3 and each positioning pin 6, and each pressing base 17 arranged on the base 1 penetrates out of a yielding groove formed in the vane. The pressing block 13 is placed above the pressing base 17, and the hexagon bolt 15 is pre-tightened. The screw C20 is loosened, and the knock pin 19 is pushed up by the compression spring 22 to contact the blade. The bolt C20 is locked to fix the knock pin 19. The blade is clamped by locking the hexagon bolts 15. And (3) checking the fitting condition of each positioning point of the blade with the positioning block 3 and the positioning pin 6 by using a 0.03mm feeler gauge, determining that the blade is clamped in place, and finishing the blade clamping. And (4) installing the clamp for clamping the blade on equipment through the positioning mechanism 2, and processing the blade. The clamping mode can realize rapid clamping of the blade, can expose the processing area of the blade to the maximum extent, can process all processing surfaces by only one-time clamping, reduces the labor intensity of workers, reduces the conversion times of the blade processing benchmark, enhances the processing precision of the blade, and can also be applied and popularized to the processing of low-pressure turbine blades of other aero-engines.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. The clamping mechanism for the guide vane of the low-pressure turbine comprises a base (1) and is characterized in that a plurality of positioning blocks (3), positioning pins (6), a jacking mechanism (12) and a shape following pressing mechanism (16) are mounted on the upper surface of the base (1), the positioning blocks (3) are mounted on the right side and the front side of the base (1), the positioning pins (6) are mounted on the left side and the right side of the base (1), the jacking mechanism (12) is mounted on the left side of the base (1), and the shape following pressing mechanism (16) is mounted in the middle of the base (1); the jacking mechanism (12) comprises a jacking pin (19), a hole A (25) is formed in the base (1), the jacking pin (19) penetrates through the hole A (25) and extends upwards, an internal thread is processed below the hole A (25), a screw plug (21) is in threaded connection with the internal thread, a pressure spring (22) is installed between the upper surface of the screw plug (21) and the bottom of the jacking pin (19), a connecting block (23) is sleeved outside the upper part of the jacking pin (19), the connecting block (23) is fixedly connected onto the base (1), a hole B (26) in the vertical direction is formed in the connecting block (23), the hole B (26) is a through hole, the jacking pin (19) is sleeved inside the hole B (26), a hole C (27) which is vertical to the hole B (26) is formed in the side surface of the connecting block (23), and the hole C (27) is communicated with the hole B (26), the hole C (27) is a threaded hole, and a screw C (20) is connected to the inner thread of the hole C (27).
2. The clamping mechanism for the guide vane of the low-pressure turbine as claimed in claim 1, wherein the conformal pressing mechanism (16) comprises a pressing base (17), the pressing base (17) is fixedly connected to the upper surface of the base (1) and extends upwards, a pressing block (13) is mounted above the pressing base (17), a through hole is formed in the pressing block (13), a threaded hole is formed in the upper surface of the pressing base (17), a hexagonal bolt (15) penetrates through the through hole and the threaded hole, and the pressing block (13) and the pressing base (17) are connected through the hexagonal bolt (15).
3. The clamping mechanism for the guide vane of the low-pressure turbine as claimed in claim 2, wherein a gasket (14) is bonded to the lower surface of the pressing block (13), and the gasket (14) is made of polytetrafluoroethylene.
4. The clamping mechanism for the guide vanes of the low-pressure turbine as claimed in any one of claims 1 to 3, characterized in that a positioning mechanism (2) is fixedly connected below the base (1).
5. The clamping mechanism for the guide vane of the low-pressure turbine as claimed in any one of claims 1 to 3, characterized in that the positioning block (3) is fixedly connected to the base (1) by a pin (4) and a screw A (5).
6. The clamping mechanism for the guide vane of the low-pressure turbine as claimed in any one of claims 1 to 3, characterized in that the number of the positioning blocks (3) is at least three.
7. The low-pressure turbine guide vane clamping mechanism as claimed in any one of claims 1 to 3, characterized in that the number of the positioning pins (6) is at least three.
8. The clamping mechanism for the guide vanes of the low-pressure turbine as claimed in any one of claims 1 to 3, characterized in that the number of the jacking mechanisms (12) and the form-following pressing mechanisms (16) is at least two respectively.
9. A clamping method using the low-pressure turbine guide vane clamping mechanism as claimed in claim 3, characterized by comprising the following steps:
A. before the guide vane of the low-pressure turbine is installed, a top pin (19) is pressed down, and a screw C (20) is locked;
B. the guide vane of the low-pressure turbine is placed on a base (1), each positioning point of the vane is in contact with each positioning block (3) and each positioning pin (6), and each pressing base (17) arranged on the base (1) penetrates out of a yielding groove formed in the vane;
C. placing the pressing block (13) above the pressing base (17), and pre-tightening the hexagon bolt (15);
D. loosening the screw C (20), and jacking the jacking pin (19) upwards under the action of the pressure spring (22) to be in contact with the blade;
E. a locking screw C (20);
F. a locking hexagon bolt (15);
G. and (3) inspecting the fitting condition of each positioning point of the blade with the positioning block (3) and the positioning pin (6) by using a 0.03mm feeler gauge, determining that the blade is clamped in place, and finishing the blade clamping.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910543800.0A CN110315358B (en) | 2019-06-21 | 2019-06-21 | Low-pressure turbine guide blade clamping mechanism and clamping method |
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| CN201910543800.0A CN110315358B (en) | 2019-06-21 | 2019-06-21 | Low-pressure turbine guide blade clamping mechanism and clamping method |
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| CN110315358A CN110315358A (en) | 2019-10-11 |
| CN110315358B true CN110315358B (en) | 2020-06-23 |
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| CN112355948B (en) * | 2020-10-29 | 2022-08-26 | 中国航发南方工业有限公司 | Guide vane equipment protection anchor clamps |
| CN113910104B (en) * | 2021-09-29 | 2022-09-13 | 中国航发动力股份有限公司 | Throat equivalent adjusting device in turbine guide vane processing |
| CN114227536A (en) * | 2021-12-30 | 2022-03-25 | 无锡透平叶片有限公司 | Grinding fixture suitable for turbine multi-connected guide vane part assembly |
| CN114274058A (en) * | 2021-12-31 | 2022-04-05 | 无锡透平叶片有限公司 | Adjustable universal shot blasting clamp for multi-model turbine blades |
| CN114800161B (en) * | 2022-06-13 | 2023-08-15 | 西安朋邦工贸有限公司 | Clamping fixture and clamping method for machining tenon of turbine working blade |
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| US4033569A (en) * | 1976-10-15 | 1977-07-05 | Dunn Garf L | Deformation-preventing workpiece-holding fixture for machine tools |
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| CN110315358A (en) | 2019-10-11 |
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Denomination of invention: Low pressure turbine guide vane clamping mechanism and clamping method Effective date of registration: 20211210 Granted publication date: 20200623 Pledgee: Xixian New District Financing Guarantee Co.,Ltd. Pledgor: Xi'an Peng Bang industry and Trade Co.,Ltd. Registration number: Y2021610000409 |
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Date of cancellation: 20230110 Granted publication date: 20200623 Pledgee: Xixian New District Financing Guarantee Co.,Ltd. Pledgor: Xi'an Peng Bang industry and Trade Co.,Ltd. Registration number: Y2021610000409 |
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Denomination of invention: A clamping mechanism and clamping method for low-pressure turbine guide blades Granted publication date: 20200623 Pledgee: Pudong Development Bank of Shanghai Limited by Share Ltd. Xi'an branch Pledgor: Xi'an Peng Bang industry and Trade Co.,Ltd. Registration number: Y2024980000588 |
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