CN114800161A - Clamping fixture and clamping method for machining tenon of turbine working blade - Google Patents
Clamping fixture and clamping method for machining tenon of turbine working blade Download PDFInfo
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- CN114800161A CN114800161A CN202210659103.3A CN202210659103A CN114800161A CN 114800161 A CN114800161 A CN 114800161A CN 202210659103 A CN202210659103 A CN 202210659103A CN 114800161 A CN114800161 A CN 114800161A
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- 238000003754 machining Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000003825 pressing Methods 0.000 claims abstract description 31
- 230000008093 supporting effect Effects 0.000 claims description 46
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 claims description 14
- 238000001125 extrusion Methods 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 12
- 238000005096 rolling process Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 8
- 244000309464 bull Species 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 210000004027 cell Anatomy 0.000 claims 1
- 210000002421 cell wall Anatomy 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910001152 Bi alloy Inorganic materials 0.000 description 1
- JWVAUCBYEDDGAD-UHFFFAOYSA-N bismuth tin Chemical compound [Sn].[Bi] JWVAUCBYEDDGAD-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/14—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding turbine blades, propeller blades or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention discloses a clamping fixture and a clamping method for processing a tenon of a turbine working blade, the clamping fixture for processing the tenon of the turbine working blade comprises a machine tool, a base is fixedly arranged on the machine tool, a first support is fixedly arranged on the base, a second support is fixedly arranged on the first support, a third support is fixedly arranged on the second support, a movable positioning block is arranged on the third support, a pressing plate is rotatably arranged on the second support, an auxiliary groove is arranged at the connecting part of the first support and the second support, a pressure spring is fixedly arranged in the auxiliary groove, a first auxiliary support block is fixedly arranged at the end part of the pressure spring close to the pressing plate, the clamping of the low-pressure turbine working blade can be rapidly completed, the tenon tooth and the flange plate processing area thereof are exposed to the maximum extent, and the multi-station processing can be completed on a numerical control grinding center with a tool magazine, the machining efficiency is improved, the machining precision of the blades is improved, and the machining method can be popularized to machining of low-pressure turbine blades of other aero-engines.
Description
Technical Field
The invention relates to the technical field of clamping fixtures for blade tenon machining, in particular to a clamping fixture and a clamping method for machining a turbine working blade tenon.
Background
The low-pressure turbine working blade is usually of a narrow chord length shrouded structure, the radial span of a blade body is large, the chord length is short, the whole structure of a part is long and thin, the blade body of the blade is subjected to allowance-free precision casting, the tenon, the edge plate and the blade shroud are partially left with allowance, and the tenon, the edge plate and the blade shroud of the part need to be machined, and the rough material positioning reference of the turbine working blade is a 6-point positioning system, usually 2 points of the root of the tenon, 1 point of the tooth side of the tenon, 1 point of the blade back of the blade body, 1 point of the air inlet side of the blade body and 1 point of the flow passage surface of the edge plate.
The existing clamping fixture is used for processing parts by adopting a precision positioning method and a hard mounting method, the precision positioning method is that a tin-bismuth alloy or other media is adopted, a 6-point positioning system is transferred through a positioning block for pouring a wrapped part, but because of the slender structure of a low-pressure turbine working blade, the wrapped block is too large and is not beneficial to operation, the hard mounting method is that a 6-point positioning system tool is directly designed, but because of the position of a positioning point, in the processing process of the blade, the problem of processing interference needs to be considered, a plurality of processing procedures need to be designed, the processing mode cannot be efficiently utilized, the grinding processing center with a tool magazine is advanced firstly, and meanwhile, the datum conversion is also generated, and the processing precision of the parts is influenced.
Disclosure of Invention
The invention aims to provide a clamping fixture and a clamping method for machining a turbine working blade tenon, so as to solve the problems in the background art.
In order to solve the technical problems, the invention provides the following technical scheme: a clamping fixture and a clamping method for machining a turbine working blade tenon are disclosed, the clamping fixture for machining the turbine working blade tenon comprises a machine tool, a base is fixedly mounted on the machine tool, a first support is fixedly mounted on the base, a second support is fixedly mounted on the first support, a third support is fixedly mounted on the second support, a limiting groove is formed in the third support, a movable positioning block is mounted in the limiting groove, positioning pins are fixedly mounted on the third support and the movable positioning block respectively, a pressing plate is rotatably mounted on the second support, an auxiliary groove is formed in the connecting position of the first support and the second support, a pressure spring is fixedly mounted in the auxiliary groove, a first auxiliary support block is fixedly mounted at the end part of the pressure spring close to the pressing plate, the first auxiliary support block is in sliding fit with the auxiliary groove, and an adjusting hole is formed in the auxiliary groove, a first square head screw is arranged in the adjusting hole, a fastening hole is formed in the second support, a compression screw is inserted in the fastening hole, a knurled nut is fixedly mounted on the compression screw, a second auxiliary support block and a second square head screw are arranged on the second support, the second square head screw is matched with the second auxiliary support block, the base is fixed on the machine tool, the first support is fixed on the machine tool through an inner hexagonal cylindrical head screw and a cylindrical pin, the second support is fixed on the first support through an inner hexagonal cylindrical head screw, the knurled nut and the compression screw are mounted on the second support, the pressing plate is fixed on the second support through the cylindrical pin to form a hinge mechanism, the hexagonal cylindrical head screw is mounted on the pressing plate and the second support to form a compression mechanism, the third support is mounted on the second support through a hexagonal head screw, a pressure spring is mounted on the second support through a hexagonal head screw, and the pressure spring, The first auxiliary supporting block and the first square head screw are arranged on the second support to form an auxiliary supporting mechanism, the pressing plate is fixed on the second support through a cylindrical pin to form a dumpling chain mechanism, the hexagonal cylindrical head screw is arranged on the pressing plate and the second support to form a pressing mechanism, the second square head screw and the second auxiliary supporting block are arranged on the second support to form an auxiliary supporting structure, the movable positioning block, the inner hexagonal cylindrical head screw and the inner hexagonal cylindrical head screw are arranged on the third support to form a detachable and creep positioning mechanism, and the positioning pin is arranged on the third support, can quickly finish the clamping of the working blade of the low-pressure turbine, furthest expose the tenon tooth and the processing area of the edge plate thereof, the multi-station machining can be completed on a numerical control grinding center with a tool magazine, the machining efficiency is improved, the machining precision of blades is improved, and the method can be applied and popularized to machining of low-pressure turbine blades of other aero-engines.
As preferred technical scheme, be provided with the bits subassembly of removing on lathe and the base, can carry out automatic clearance to the piece that produces in the course of working through removing the bits subassembly.
As a preferred technical scheme, the chip removing assembly comprises an air pump, an air cavity, a chip collecting groove, a partition plate, a chip discharging hole, an air inlet hole, an exhaust pipe, a box body, an air conveying pipe, a cavity, a first falling hole, a second falling hole and a chip discharging hole;
the machine tool is characterized in that an air pump is fixedly arranged on the machine tool, an air outlet pipe is connected to the output end of the air pump, an air cavity is arranged in the base, a scrap collecting groove is formed in the upper surface of the base and located above the air cavity, a plurality of partition plates are fixedly arranged in the scrap collecting groove, the bottom of the scrap collecting groove is communicated with the air cavity through a scrap discharging hole, an air inlet hole is formed in the inner wall, close to the air pump, of the air cavity, an exhaust pipe is fixedly arranged on the outer port of the air inlet hole, the output end of the exhaust pipe is connected with the air inlet hole, a box body is fixedly arranged on one side, close to the air pump, of the machine tool, an air flow utilization assembly is arranged on the box body, the input end of the box body is connected with the air outlet pipe, the output end of the box body is connected with the input end of the exhaust pipe through an air pipe, a cavity is formed in the table surface of the machine tool, and a first falling hole and a second falling hole are formed between the air cavity and the cavity, the first falling hole is butted with the second falling hole, one side of the cavity far away from the bottom of the box body cavity is provided with a chip removal hole, a fixed frame is fixedly arranged below the machine tool, a collecting box is arranged in the fixed frame, a collecting opening of the collecting box is positioned below the chip removing hole, when multi-station processing is carried out, the air pump is started, the air outlet pipe leads the generated high-speed airflow into the box body, the high-speed airflow entering the box body enters the exhaust pipe through the air delivery pipe, thereby entering the air cavity, when the high-speed air flow flows in the air cavity at high speed, the chips in the chip collecting grooves can be sucked into the air cavity through the chip falling holes by utilizing the air flow suction force generated by the high-speed air flow, and then enter the cavity through the first falling holes and the second falling holes along with the flow of the air flow, the chips can fall into the collecting box through the chip removing holes under the pushing of the air flow, so that the automatic cleaning of the chips is completed.
According to the preferable technical scheme, the plurality of the partition plates are triangular plates, the cross sections of the partition plates are isosceles triangles, one side of each partition plate is fixedly connected with the bottom of the chip collecting groove, the bottom between every two adjacent partition plates is provided with the chip discharging hole, and the chips falling into the chip collecting grooves can be completely located at the bottom of the grooves through the plurality of the partition plates, so that the chips can be sucked conveniently.
As the preferred technical scheme, the airflow utilization assembly comprises a rotating shaft, a fan plate and a driving gear;
the front side wall and the rear side wall of the box body are symmetrically provided with first rotating holes, rotating shafts are rotatably arranged in the rotating holes, fan plates are fixedly arranged on the shaft side wall of the rotating shafts along the circumferential direction, driving teeth are fixedly arranged at both ends of the rotating shafts, a movable cavity is arranged in the table top of the machine tool and is positioned between the cavity and the box body, second rotating holes are symmetrically arranged on the front cavity wall and the rear cavity wall of the movable cavity, rotating rods are rotatably arranged in the second rotating holes, the adjacent ends of the two rotating rods are connected through an extrusion roller, the extrusion roller is of an elliptical structure, driven teeth are fixedly arranged at the back ends of the two rotating rods, the driven teeth are matched with the driving teeth, when high-speed air enters the input end and flows out of the box body, the high-speed air can generate driving force on the fan plates in the flowing process, so that the fan plates can drive the driving teeth to rotate through the rotating shafts under the action force of the air flow, through driven tooth and drive tooth mesh mutually for when drive tooth drives driven tooth pivoted, let driven tooth can drive the squeeze roll through the bull stick and carry out periodic rotation, thereby can provide the operation drive power for chip removal clearance subassembly.
As a preferred technical scheme, a chip removal cleaning assembly is arranged in the cavity.
As a preferred technical scheme, the chip removal cleaning assembly comprises an extrusion air bag, a sliding groove, a fixed rod, a sliding block, a sliding hole, a pressurization air bag, a supporting spring, a moving block and a push shovel;
the inner wall of the movable cavity, which is close to the cavity, is fixedly provided with an extrusion air bag, the front cavity wall and the rear cavity wall of the cavity are symmetrically provided with sliding grooves, fixed rods are fixedly arranged in the sliding grooves, sliding blocks are slidably arranged on the fixed rods, sliding holes are formed in the sliding blocks, the fixed rods penetrate through the sliding holes and are in sliding fit, a pressurization air bag is sleeved on the fixed rods, one end of the pressurization air bag is connected with one side, which is close to the movable cavity, of the sliding block, the other end of the pressurization air bag is connected with the groove wall, which is close to the movable cavity, of the sliding block, a supporting spring is sleeved on the fixed rods, one end of the supporting spring is connected with one side, which is far away from the pressurization air bag, of the sliding blocks, the other end of the supporting spring is connected with the groove wall, which is far away from the pressurization air bag, of the pressurization air bag and the extrusion air bag are connected through a hose, the two sliding blocks are connected through a moving block, and the bottom of one side, which is far away from the movable cavity, of the moving block is provided with a push shovel, when the squeeze roller rotates, the oval characteristic of the squeeze roller is utilized in each rotation period of the squeeze roller, the squeeze airbag can be squeezed once in each rotation period, when the squeeze airbag is compressed by the squeeze roller, air flow in the squeeze airbag can enter the pressurizing airbag through the hose, the sliding block can be pushed to compress the supporting spring on the fixed rod along with the volume expansion of the pressurizing airbag, and the sliding block can move transversely on the fixed rod, so that the moving block can be driven to move synchronously, the moving block drives the push shovel to push chips accumulated in the cavity into the chip removal hole in the moving process, the cleaning effect of the chips is improved, the chips cannot be accumulated in the cavity, when the squeeze roller passes through the squeeze airbag, the sliding block can be pushed to squeeze the pressurizing airbag under the elastic force of the supporting spring, and the gas in the pressurizing airbag can flow back into the squeeze airbag through the hose, let the extrusion gasbag recover, can accomplish the preparation for the spin cycle process of next squeeze roll to the guarantee pushes away the shovel and can all carry out the chip removal operation in every spin cycle of squeeze roll.
According to a preferable technical scheme, a rolling groove is formed in the inner wall of the hole of the sliding hole, a ball is embedded in the rolling groove in a rolling mode, the ball is in point contact with the rod wall of the fixed rod, moving friction force between the sliding block and the fixed rod can be weakened through the ball, and the sliding block can move on the fixed rod smoothly.
As preferred technical scheme, the dozer articulates on the movable block, and the dozer is the arc shovel, the intrados of dozer is towards the chip removal hole, and the extrados of dozer is towards movable chamber for when the dozer moves towards the chip removal hole, the dozer receives the supporting role of movable block and can push the piece of the interior long-pending of chamber downthehole to the chip removal, when the dozer resets along with the movable block, because the dozer is articulated with the movable block, can shift up when the dozer receives the piece and hinders, thereby can avoid driving the piece and remove together.
A clamping method of a clamping fixture for machining a turbine working blade tenon comprises the following steps:
s1, mounting the movable positioning block in a limiting groove on the third support, and screwing an inner hexagonal socket head cap screw to ensure that the movable positioning block is mounted in place;
s2, placing the part in a tool, screwing the hexagonal socket head cap screw and the hexagonal socket head cap screw, and slightly compressing the part by the pressure plate;
s3, adjusting the first square head screw to enable the first auxiliary supporting block to bounce, screwing down the first square head screw, and adjusting the knurled nut to enable the compression screw to slightly push against the part;
s4, tightening the hexagonal socket head cap screw, the hexagonal socket head cap screw and the knurled nut to enable the pressing plate and the pressing screw to tightly press the part;
s5, screwing a second lag screw to enable a second auxiliary supporting block to contact the part;
s6, loosening the socket head cap screw and the socket head cap screw, removing the movable positioning block, and completing the part clamping action.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can quickly finish the clamping of the working blade of the low-pressure turbine, expose the processing area of the tenon tooth and the flange plate thereof to the maximum extent, finish multi-station processing on a numerical control grinding center with a tool magazine, improve the processing efficiency, improve the processing precision of the blade and be applied and popularized to the processing of low-pressure turbine blades of other aero-engines.
2. When carrying out the multistation and adding man-hour, start the air pump, the high-speed draught that makes the outlet duct produce lets in the box body, the high-speed draught that enters into in the box body passes through the gas-supply pipe and gets into in the exhaust duct to can enter into the air cavity, when the high-speed draught flows at a high speed in the air cavity, utilize the produced air current suction of high-speed draught, can be with the piece in the chip groove through lower bits hole by the suction in the air cavity, and then in first whereabouts hole and the second whereabouts hole entering into the cavity along with the flow of air current, can fall into in the collection box through the chip removal hole in the promotion of process air current, thereby accomplish clastic automatic clearance.
3. When the input that high-speed air current entered into the box body gets into the output and flows out, high-speed air current can produce the motive force to the fan board at the flow in-process to make the fan board drive the drive tooth through the pivot under the air current effort and rotate, mesh mutually with the drive tooth through driven tooth, when making the drive tooth drive driven tooth pivoted, let driven tooth can drive the squeeze roll through the bull stick and carry out periodic rotation, thereby can provide the operation drive power for chip removal clearance subassembly.
4. When the squeeze roller rotates, the oval characteristic of the squeeze roller is utilized in each rotation period of the squeeze roller, the squeeze airbag can be squeezed once in each rotation period, when the squeeze airbag is compressed by the squeeze roller, air flow in the squeeze airbag can enter the pressurizing airbag through the hose, the sliding block can be pushed to compress the supporting spring on the fixed rod along with the volume expansion of the pressurizing airbag, and the sliding block can move transversely on the fixed rod, so that the moving block can be driven to move synchronously, the moving block drives the push shovel to push chips accumulated in the cavity into the chip removal hole in the moving process, the cleaning effect of the chips is improved, the chips cannot be accumulated in the cavity, when the squeeze roller passes through the squeeze airbag, the sliding block can be pushed to squeeze the pressurizing airbag under the elastic force of the supporting spring, and the gas in the pressurizing airbag can flow back into the squeeze airbag through the hose, let the extrusion gasbag recover, can accomplish the preparation for the spin cycle process of next squeeze roll to the guarantee pushes away the shovel and can all carry out the chip removal operation in every spin cycle of squeeze roll.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a front view cut-away schematic of the present invention;
FIG. 4 is a schematic bottom view of the structure of FIG. 3 taken at A-A;
FIG. 5 is a sectional top view of the structure of FIG. 3 at B-B;
FIG. 6 is an enlarged schematic view of FIG. 3 at a;
FIG. 7 is an enlarged view of the structure at b of FIG. 6;
fig. 8 is an enlarged schematic view of fig. 3 at c.
In the figure: 1. a machine tool; 2. a base; 3. a first support; 4. a second support; 5. a third support; 6. a movable positioning block; 7. positioning pins; 8. pressing a plate; 9. an auxiliary groove; 10. a first auxiliary support block; 11. a pressure spring; 12. a first lag screw; 13. knurling the nut; 14. a compression screw; 15. a second auxiliary support block; 16. a second lag screw;
17. a chip removal assembly; 1701. an air pump; 1702. an air outlet pipe; 1703. an air cavity; 1704. a chip collecting groove; 1705. a partition plate; 1706. a lower chip hole; 1707. an air inlet; 1708. an exhaust pipe; 1709. a box body; 1710. a gas delivery pipe; 1711. a chamber; 1712. a first drop hole; 1713. a second drop hole; 1714. chip removal holes; 1715. a fixing frame; 1716. a collection box;
18. an airflow utilization assembly; 1801. a rotating shaft; 1802. a fan plate; 1803. a drive tooth; 1804. a movable cavity; 1805. a rotating rod; 1806. a driven tooth; 1807. a squeeze roll;
19. a chip removal cleaning assembly; 1901. extruding the air bag; 1902. a chute; 1903. fixing the rod; 1904. a slider; 1905. a slide hole; 1906. a pressurizing air bag; 1907. a support spring; 1908. a moving block; 1909. rolling a groove; 1910. a ball bearing; 1911. and (5) pushing the shovel.
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.
Example (b): as shown in fig. 1 to 8, the present invention provides the following technical solutions: a clamping fixture for machining a turbine working blade tenon and a clamping method are provided, the clamping fixture for machining the turbine working blade tenon comprises a machine tool 1, a base 2 is fixedly installed on the machine tool 1, a first support 3 is fixedly installed on the base 2, a second support 4 is fixedly installed on the first support 3, a third support 5 is fixedly installed on the second support 4, a limit groove is formed in the third support 5, a movable positioning block 6 is installed in the limit groove, positioning pins 7 are fixedly installed on the third support 5 and the movable positioning block 6, a pressing plate 8 is rotatably installed on the second support 4, an auxiliary groove 9 is formed in the joint of the first support 3 and the second support 4, a pressure spring 11 is fixedly installed in the auxiliary groove 9, and a first auxiliary supporting block 10 is fixedly installed at the end part, close to the pressing plate 8, of the pressure spring 11, the first auxiliary supporting block 10 is in sliding fit with the auxiliary groove 9, an adjusting hole is formed in the auxiliary groove 9, a first square screw 12 is arranged in the adjusting hole, a fastening hole is formed in the second support 4, a compression screw 14 is inserted in the fastening hole, a knurled nut 13 is fixedly mounted on the compression screw 14, a second auxiliary supporting block 15 and a second square screw 16 are arranged on the second support 4, the second square screw 16 is matched with the second auxiliary supporting block 15, wherein the base 2 is fixed on the machine tool 1, the first support 3 is fixed on the machine tool 1 through an inner hexagonal cylindrical head screw and a cylindrical pin, the second support 4 is fixed on the first support 3 through an inner hexagonal cylindrical head screw, the knurled nut 13 and the compression screw 14 are mounted on the second support 4, and the pressing plate 8 is fixed on the second support 4 through the cylindrical pin to form a hinge mechanism, hexagonal socket head cap screws are arranged on a pressing plate 8 and a second support 4 to form a pressing mechanism, a third support 5 is arranged on the second support 4 through the hexagonal socket head cap screws, a pressure spring 11, a first auxiliary supporting block 10 and a first square head screw 12 are arranged on the second support 4 to form an auxiliary supporting mechanism, the pressing plate 8 is fixed on the second support 4 through a cylindrical pin to form a hinge mechanism, the hexagonal socket head cap screws are arranged on the pressing plate 8 and the second support 4 to form the pressing mechanism, a second square head screw 16 and a second auxiliary supporting block 15 are arranged on the second support 4 to form an auxiliary supporting structure, a movable positioning block 6, an inner hexagonal socket head cap screw and an inner hexagonal socket head cap screw are arranged on the third support 5 to form a detachable and creep positioning mechanism, a positioning pin 7 is arranged on the third support 5 to quickly complete the clamping of a low-pressure turbine working blade, and expose a tenon tooth and a flange plate processing area to the maximum extent, the multi-station machining can be completed on a numerical control grinding center with a tool magazine, the machining efficiency is improved, the machining precision of the blade is improved, and the method can be applied and popularized to machining of low-pressure turbine blades of other aero-engines.
Be provided with on lathe 1 and the base 2 and remove bits subassembly 17, can carry out automatic clearance to the piece that produces in the course of working through removing bits subassembly 17.
As shown in fig. 1-3, 6 and 8, the chip removing assembly 17 comprises an air pump 1701, an air chamber 1703, a chip collecting groove 1704, a partition 1705, a lower chip hole 1706, an air inlet 1707, an exhaust pipe 1708, a box body 1709, an air pipe 1710, a chamber 1711, a first drop hole 1712, a second drop hole 1713 and a chip exhaust hole 1714;
an air pump 1701 is fixedly installed on the machine tool 1, an air outlet pipe 1702 is connected to the output end of the air pump 1701, an air cavity 1703 is arranged in the base 2, a chip collecting groove 1704 is formed in the upper surface of the base 2, the chip collecting groove 1704 is located above the air cavity 1703, a plurality of partition plates 1705 are fixedly installed in the chip collecting groove 1704, the bottom of the chip collecting groove 1704 is communicated with the air cavity 1703 through a chip lower hole 1706, an air inlet hole 1707 is formed in the inner wall, close to the air pump 1701, of the air cavity 1703, an exhaust pipe 1708 is fixedly installed on the outer port of the air inlet hole 1707, the output end of the exhaust pipe 1708 is connected with the air inlet hole 1707, a box body 1709 is fixedly installed on one side, close to the air pump 1701, of the table top of the machine tool 1, an air flow utilization assembly 18 is arranged on the box body 1709, the input end of the box body 1709 is connected with the air outlet pipe 1702, the output end of the box body 1709 is connected with the input end of the exhaust pipe 1708 through an air pipe 1710, a chamber 1711 is arranged in the table top of the machine tool 1, a first falling hole 1712 and a second falling hole 1713 are arranged between the air chamber 1703 and the chamber 1711, the first falling hole 1712 is butted with the second falling hole 1713, a chip removing hole 1714 is arranged on one side of the chamber 1711, which is far away from the bottom of the chamber 1709 of the box body 1709, a fixed frame 1715 is fixedly arranged under the machine tool 1, a collecting box 1716 is arranged in the fixed frame 1715, a collecting port of the collecting box 1716 is positioned below the chip removing hole 1714, when the multi-station processing is carried out, the air pump 1701 is started, the high-speed air flow generated by the air outlet pipe 1702 is led into the box body 1709, the high-speed air flow entering the box body 1709 enters the air outlet pipe 1708 through the air conveying pipe 1710, so as to enter the air chamber 1703, when the high-speed air flow flows in the air chamber 1703, the chips in the chip collecting groove 1704 can be sucked into the air chamber 1703 through the chip removing hole 1706 by the air suction force generated by the high-speed air flow generated by the high-flow, and then enters the chamber 1711 through the first and second falling holes 1712 and 1713 along with the flowing of the air flow, and can fall into the collecting box 1716 through the dust exhaust holes 1714 under the pushing of the air flow, thereby completing the automatic cleaning of the chips.
Many the baffle 1705 is the set-square, and the cross section is isosceles triangle, one of them limit of baffle 1705 and the tank bottom fixed connection of collection bits groove 1704, adjacent two chip hole 1706 down has been seted up to the tank bottom between the baffle 1705, can ensure through many baffles 1705 that the piece that falls into in collection bits groove 1704 is all located the tank bottom, is favorable to the suction of chip hole 1706 down.
As shown in fig. 1-3 and 6, the airflow utilization assembly 18 includes a rotating shaft 1801, a fan plate 1802, and a driving tooth 1803;
first rotating holes are symmetrically formed in the front side wall and the rear side wall of the box body 1709, a rotating shaft 1801 is rotatably mounted in the rotating holes, fan plates 1802 are fixedly mounted on the shaft side wall of the rotating shaft 1801 along the circumferential direction, driving teeth 1803 are fixedly mounted at the two ends of the rotating shaft 1801, a movable cavity 1804 is arranged in the table board of the machine tool 1, the movable cavity 1804 is located between a cavity 1711 and the box body 1709, second rotating holes are symmetrically formed in the front cavity wall and the rear cavity wall of the movable cavity 1804, rotating rods 1805 are rotatably mounted in the second rotating holes, the adjacent ends of the rotating rods 1805 are connected through extrusion rollers 1807, the extrusion rollers 1807 are of an oval structure, driven teeth 1806 are fixedly mounted at the opposite back ends of the rotating rods 1805, the driven teeth 1806 are matched with the driving teeth 1803, when high-speed air enters the input end of the box body 1709 and flows out, the high-speed air can generate driving force on the fan plates 1802 in the flowing process, thereby make fan board 1802 drive tooth 1803 through pivot 1801 drive under the air current effort and rotate, mesh mutually with drive tooth 1803 through driven tooth 1806 for drive tooth 1803 drives driven tooth 1806 pivoted in, let driven tooth 1806 drive squeeze roll 1807 through bull stick 1805 and carry out periodic rotation, thereby can provide the operation drive power for chip removal clearance subassembly 19.
A chip removal cleaning assembly 19 is arranged in the cavity 1711.
The chip removal cleaning assembly 19 shown in fig. 3 and fig. 6-8 comprises an extrusion air bag 1901, a sliding groove 1902, a fixed rod 1903, a sliding block 1904, a sliding hole 1905, a pressurization air bag 1906, a supporting spring 1907, a moving block 1908 and a push shovel 1911;
an extrusion air bag 1901 is fixedly installed on the inner wall of the movable cavity 1804 close to the cavity 1711, sliding grooves 1902 are symmetrically formed in the front wall and the rear wall of the cavity 1711, a fixing rod 1903 is fixedly installed in the sliding groove 1902, a sliding block 1904 is slidably installed on the fixing rod 1903, a sliding hole 1905 is formed in the sliding block 1904, the fixing rod 1903 penetrates through the sliding hole 1905 and is in sliding fit, a pressurization air bag 1906 is sleeved on the fixing rod 1903, one end of the pressurization air bag 1906 is connected with one side of the sliding block 1904 close to the movable cavity 1804, the other end of the pressurization air bag 1906 is connected with the groove wall of the sliding groove 1902 close to the movable cavity 1804, the pressurization air bag 1906 is connected with the extrusion air bag 1901 through a hose, a supporting spring 1907 is sleeved on the fixing rod 1903, one end of the supporting spring 1907 is connected with one side of the sliding block 1904 far away from the pressurization air bag 1906, and the other end of the sliding groove 1902 is connected with the groove wall of the pressurization air bag 1906, the two sliding blocks 1904 are connected through a moving block 1908, a push shovel 1911 is installed at the bottom of one side of the moving block 1908, which is far away from the movable cavity 1804, when the squeeze roller 1807 rotates, in each rotation period of the squeeze roller 1807, the squeeze air bag 1901 can be squeezed once in each rotation period by using the elliptic characteristic of the squeeze roller 1807, when the squeeze air bag 1901 is compressed by the squeeze roller 1807, the air flow in the squeeze air bag 1901 can enter the pressurized air bag 1906 through the hose, the sliding block 1904 can be pushed to compress the supporting spring 1907 on the fixed rod 1903 along with the volume expansion of the pressurized air bag 1906, and the moving block 1903 is moved laterally, so that the moving block 1908 can be driven to move synchronously, the push shovel 1911 is driven to push the chips accumulated in the cavity 1711 into the chip removal hole 1714 during the moving process, the cleaning effect of the chips is improved, and the chips 1711 are prevented from being accumulated in the cavity 1711, when the squeeze roller 1807 passes by the squeeze airbag 1901, the slider 1904 can be pushed to squeeze the pressurized airbag 1906 under the action of the elastic force of the supporting spring 1907, so that the gas in the pressurized airbag 1906 can flow back into the squeeze airbag 1901 through the hose, the squeeze airbag 1901 can recover, preparation can be completed for the progress of the rotation period of the next squeeze roller 1807, and the push shovel 1911 can perform chip removal operation in each rotation period of the squeeze roller 1807.
A rolling groove 1909 is formed in the inner wall of the slide hole 1905, a ball 1910 is engaged in the rolling groove 1909 in a rolling manner, the ball 1910 is in point contact with the shaft wall of the fixing shaft 1903, and the moving friction force between the slider 1904 and the fixing shaft 1903 can be weakened by the ball 1910, so that the slider 1904 can move smoothly on the fixing shaft 1903.
The push shovel 1911 is hinged to the moving block 1908, the push shovel 1911 is an arc shovel, an inner arc surface of the push shovel 1911 faces the chip removal hole 1714, an outer arc surface of the push shovel 1911 faces the movable cavity 1804, so that when the push shovel 1911 moves towards the chip removal hole 1714, chips accumulated in the cavity 1711 can be pushed into the chip removal hole 1714 under the supporting effect of the moving block 1908 of the push shovel 1911, and when the push shovel 1911 resets along with the moving block 1908, the push shovel 1911 can move upwards when being blocked by the chips due to the fact that the push shovel 1911 is hinged to the moving block 1908, and therefore the chips can be prevented from being driven to move together.
A clamping method of a clamping fixture for machining a turbine working blade tenon comprises the following steps:
s1, mounting the movable positioning block 6 in a limiting groove on the third support 5, and screwing an inner hexagonal socket head cap screw to ensure that the movable positioning block 6 is mounted in place;
s2, placing the part in a tool, screwing the hexagonal socket head cap screw and the hexagonal socket head cap screw, and slightly compressing the pressing plate 8 on the part;
s3, adjusting the first square head screw 12 to enable the first auxiliary supporting block 10 to bounce, screwing down the first square head screw 12, and adjusting the knurled nut 13 to enable the compression screw 14 to slightly push against the part;
s4, tightening the hexagonal socket head cap screw, the hexagonal socket head cap screw and the knurled nut 13 to enable the pressing plate 8 and the pressing screw 14 to tightly press the parts;
s5, screwing the second lag screw 16 to enable the second auxiliary supporting block 15 to contact the part;
s6, loosening the socket head cap screws and the socket head cap screws, removing the movable positioning blocks 6, and completing the part clamping action.
The working principle of the invention is as follows: the base 2 is fixed on a machine tool 1, a first support 3 is fixed on the machine tool 1 through an inner hexagonal socket head cap screw and a cylindrical pin, a second support 4 is fixed on the first support 3 through an inner hexagonal socket head cap screw, a knurled nut 13 and a compression screw 14 are installed on the second support 4, a pressing plate 8 is fixed on the second support 4 through a cylindrical pin to form a dumpling chain mechanism, the hexagonal socket head cap screw is installed on the pressing plate 8 and the second support 4 to form a compression mechanism, a third support 5 is installed on the second support 4 through an outer hexagonal socket head cap screw, a pressure spring 11, a first auxiliary supporting block 10 and a first square head screw 12 are installed on the second support 4 to form an auxiliary supporting mechanism, the pressing plate 8 is fixed on the second support 4 through a cylindrical pin to form a dumpling chain mechanism, the hexagonal socket head cap screw is installed on the pressing plate 8 and the second support 4 to form a compression mechanism, and a second square head screw 16, The second auxiliary supporting block 15 is installed and is formed auxiliary supporting structure on second support 4, movable positioning piece 6, hexagon socket head cap screw install and form removable positioning mechanism that slowly on third support 5, locating pin 7 is installed on third support 5, can accomplish low pressure turbine working blade clamping fast, furthest exposes tenon tooth and flange plate machining area, can accomplish multistation processing on the numerical control grinding center who has the tool magazine, and the machining efficiency is improved, and the blade machining precision is promoted, can apply and popularize to other aeroengine's low pressure turbine blade processing.
When multi-station processing is carried out, the air pump 1701 is started, the air outlet pipe 1702 leads generated high-speed air flow into the box body 1709, the high-speed air flow entering the box body 1709 enters the air outlet pipe 1708 through the air conveying pipe 1710, so that the air cavity 1703 can be led into, when the high-speed air flow flows in the air cavity 1703 at high speed, the air flow suction force generated by the high-speed air flow is utilized, chips in the chip collecting groove 1704 can be sucked into the air cavity 1703 through the chip falling holes 1706, further, the chips enter the chamber 1711 through the first falling holes 1712 and the second falling holes 1713 along with the flowing of the air flow, the chips can fall into the collecting box 1716 through the chip discharging holes 1714 under the pushing of the air flow, and therefore the automatic cleaning of the chips is completed.
When the input that enters into box body 1709 when the output flows, high-speed air can produce the motive force to sector 1802 at the flow in-process, thereby make sector 1802 drive tooth 1803 through pivot 1801 under the air current effort and rotate, mesh mutually with drive tooth 1803 through driven tooth 1806, make drive tooth 1803 drive driven tooth 1806 pivoted in, let driven tooth 1806 can drive squeeze roll 1807 through bull stick 1805 and carry out periodic rotation, thereby can provide the operation drive power for chip removal clearance subassembly 19.
When the squeezing roller 1807 rotates, the squeezing air bag 1901 can be squeezed once in each rotation period of the squeezing roller 1807 by using the elliptical characteristic of the squeezing roller 1807, and when the squeezing air bag 1901 is compressed by the squeezing roller 1807, the air flow in the squeezing air bag 1901 can enter the pressurizing air bag 1906 through the hose, and as the volume of the pressurizing air bag 1906 expands, the slider 1904 can be pushed to compress the supporting spring 1907 on the fixing rod 1903 and move transversely on the fixing rod 1903, so that the moving block 1908 can be driven to move synchronously, so that the moving block 1908 drives the shovel 1911 to push the debris accumulated in the chamber 1711 to the debris exhaust hole 1714 in the moving process, thereby improving the cleaning effect of the debris, ensuring that the debris cannot be accumulated in the chamber 1711, when the squeezing roller 1807 skips over the squeezing air bag 1901, the slider 1904 can be pushed to squeeze the pressurizing air bag 1906 under the elastic force of the supporting spring 1907, the gas in the pressurized air bag 1906 can flow back into the squeezing air bag 1901 through the hose, so that the squeezing air bag 1901 is restored, preparation can be completed for the progress of the rotation period of the next squeezing roller 1807, and the push shovel 1911 can be guaranteed to perform chip removal operation in each rotation period of the squeezing roller 1807.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a turbine working blade is clamping anchor clamps for tenon processing which characterized in that: the clamping fixture for machining the tenons of the turbine working blades comprises a machine tool (1), wherein a base (2) is fixedly mounted on the machine tool (1), a first support (3) is fixedly mounted on the base (2), a second support (4) is fixedly mounted on the first support (3), a third support (5) is fixedly mounted on the second support (4), a limiting groove is formed in the third support (5), a movable positioning block (6) is mounted in the limiting groove, positioning pins (7) are fixedly mounted on the third support (5) and the movable positioning block (6), a pressing plate (8) is rotatably mounted on the second support (4), an auxiliary groove (9) is formed in the connecting position of the first support (3) and the second support (4), a pressure spring (11) is fixedly mounted in the auxiliary groove (9), and a first auxiliary supporting block (10) is fixedly mounted at the end part, close to the pressing plate (8), of the pressure spring (11), the first auxiliary supporting block (10) is in sliding fit with the auxiliary groove (9), an adjusting hole is formed in the auxiliary groove (9), a first square head screw (12) is arranged in the adjusting hole, a fastening hole is formed in the second support (4), a compression screw (14) is inserted into the fastening hole, a knurled nut (13) is fixedly mounted on the compression screw (14), a second auxiliary supporting block (15) and a second square head screw (16) are arranged on the second support (4), and the second square head screw (16) is matched with the second auxiliary supporting block (15).
2. The clamping fixture for machining the tenons of the turbine working blades as claimed in claim 1, wherein: and chip removing assemblies (17) are arranged on the machine tool (1) and the base (2).
3. The clamping fixture for machining the tenons of the turbine working blades as claimed in claim 2, wherein: the chip removing assembly (17) comprises an air pump (1701), an air cavity (1703), a chip collecting groove (1704), a partition plate (1705), a chip discharging hole (1706), an air inlet hole (1707), an exhaust pipe (1708), a box body (1709), an air conveying pipe (1710), a chamber (1711), a first falling hole (1712), a second falling hole (1713) and a chip discharging hole (1714);
an air pump (1701) is fixedly mounted on the machine tool (1), an air outlet pipe (1702) is connected to the output end of the air pump (1701), an air cavity (1703) is arranged in the base (2), a chip collecting groove (1704) is formed in the upper surface of the base (2), the chip collecting groove (1704) is located above the air cavity (1703), a plurality of partition plates (1705) are fixedly mounted in the chip collecting groove (1704), the bottom of the chip collecting groove (1704) is communicated with the air cavity (1703) through a chip discharging hole (1706), an air inlet hole (1707) is formed in the inner wall, close to the air pump (1701), of the air cavity (1703), an exhaust pipe (1708) is fixedly mounted on the outer port of the air inlet hole (1707), the output end of the exhaust pipe (1708) is connected with the air inlet hole (1707), a box body (1709) is fixedly mounted on one side, close to the air pump (1701), of the table top of the machine tool (1), and an air flow utilization assembly (18) is arranged on the box body (1709), the input of box body (1709) is connected with outlet duct (1702), and the output of box body (1709) is connected through gas-supply pipe (1710) with the input of blast pipe (1708) through the output pipe, be equipped with cavity (1711) in the mesa of lathe (1), first fall hole (1712) and second fall hole (1713) have been seted up between air cavity (1703) and cavity (1711), first fall hole (1712) and second fall hole (1713) dock mutually, cavity (1711) is kept away from box body (1709) chamber bottom one side and has been seted up chip removal hole (1714), fixed mounting has fixed frame (1715) under lathe (1), install in fixed frame (1715) and collect box (1716), the collection mouth of collecting box (1716) is located the below of chip removal hole (1714).
4. The clamping fixture for machining the tenons of the turbine working blades as claimed in claim 3, wherein: many baffle (1705) are the set-square, and the cross section is isosceles triangle, wherein one side and the tank bottom fixed connection of chip-collecting groove (1704) of baffle (1705), two adjacent chip hole (1706) down have been seted up to the tank bottom between baffle (1705).
5. The clamping fixture for machining the tenons of the turbine working blades as claimed in claim 3, wherein: the airflow utilization assembly (18) comprises a rotating shaft (1801), a fan plate (1802) and a driving tooth (1803);
first rotating holes are symmetrically formed in the front side wall and the rear side wall of the box body (1709), a rotating shaft (1801) is rotatably installed in the rotating holes, the fan plate (1802) is fixedly arranged on the shaft side wall of the rotating shaft (1801) along the circumferential direction, the driving teeth (1803) are fixedly arranged at the two ends of the rotating shaft (1801), a movable cavity (1804) is arranged in the table board of the machine tool (1), the movable cavity (1804) is positioned between the chamber (1711) and the box body (1709), second rotating holes are symmetrically formed in the front cavity wall and the rear cavity wall of the movable cavity (1804), rotating rods (1805) are rotatably mounted in the second rotating holes, the adjacent ends of the two rotating rods (1805) are connected through an extrusion roller (1807), squeeze roll (1807) are oval column structure, two the equal fixed mounting in back of the body end of bull stick (1805) has driven tooth (1806), driven tooth (1806) cooperate with drive tooth (1803).
6. The clamping fixture for machining the tenons of the turbine working blades as claimed in claim 5, wherein: a chip removal cleaning assembly (19) is arranged in the cavity (1711).
7. The clamping fixture for machining the tenons of the turbine working blades as claimed in claim 6, wherein: the chip removal cleaning assembly (19) comprises an extrusion air bag (1901), a sliding groove (1902), a fixed rod (1903), a sliding block (1904), a sliding hole (1905), a pressurization air bag (1906), a supporting spring (1907), a moving block (1908) and a push shovel (1911);
the utility model discloses a pneumatic control device, including activity chamber (1804), cell (1711), spout (1902) have been seted up on the intracavity wall that activity chamber (1804) is close to chamber (1711) fixed mounting on the intracavity wall, spout (1902) internal fixation has dead lever (1903), slidable mounting has slider (1904) on dead lever (1903), sliding hole (1905) have been seted up on slider (1904), dead lever (1903) run through sliding hole (1905), and be sliding fit, the cover is equipped with pressure boost gasbag (1906) on dead lever (1903), the one end of pressure boost gasbag (1906) is connected with one side that slider (1904) is close to activity chamber (1804), and the other end is connected with the cell wall that spout (1902) is close to activity chamber (1902), the cover is equipped with supporting spring (1907) on dead lever (1903), the one end of supporting spring (1907) is connected with one side that slider (1904) kept away from pressure boost gasbag (1906), the other end of the sliding block is connected with a groove wall of the sliding groove (1902) far away from the pressurizing air bag (1906), the two sliding blocks (1904) are connected through a moving block (1908), and a push shovel (1911) is installed at the bottom of one side, far away from the movable cavity (1804), of the moving block (1908).
8. The clamping fixture for machining the tenons of the turbine working blades as claimed in claim 7, wherein: a rolling groove (1909) is formed in the inner wall of the sliding hole (1905), a ball (1910) is embedded in the rolling groove (1909) in a rolling mode, and the ball (1910) is in point contact with the rod wall of the fixing rod (1903).
9. The clamping fixture for machining the tenons of the turbine working blades as claimed in claim 7, wherein: the push shovel (1911) is hinged to the moving block (1908), the push shovel (1911) is an arc shovel, the inner arc surface of the push shovel (1911) faces the chip removal hole (1714), and the outer arc surface of the push shovel (1911) faces the movable cavity (1804).
10. A clamping method for applying the clamping fixture for processing the tenon of the turbine working blade as claimed in any one of claims 1 to 9, which is characterized in that:
s1, mounting the movable positioning block (6) in a limiting groove on the third support (5), and screwing a socket head cap screw to ensure that the movable positioning block (6) is mounted in place;
s2, placing the part in a tool, screwing the hexagonal socket head cap screw and the hexagonal socket head cap screw, and slightly compressing the part by the pressure plate (8);
s3, adjusting the first square head screw (12) to enable the first auxiliary supporting block (10) to bounce, screwing down the first square head screw (12), and adjusting the knurled nut (13) to enable the compression screw (14) to slightly push against the part;
s4, tightening the hexagonal socket head cap screw, the hexagonal socket head cap screw and the knurled nut (13) to enable the pressing plate (8) and the pressing screw (14) to tightly press the parts;
s5, screwing a second lag screw (16) to enable a second auxiliary supporting block (15) to contact a part;
s6, loosening the socket head cap screw and the socket head cap screw, removing the movable positioning block (6), and completing the part clamping action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210659103.3A CN114800161B (en) | 2022-06-13 | 2022-06-13 | Clamping fixture and clamping method for machining tenon of turbine working blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210659103.3A CN114800161B (en) | 2022-06-13 | 2022-06-13 | Clamping fixture and clamping method for machining tenon of turbine working blade |
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| CN114800161B CN114800161B (en) | 2023-08-15 |
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| CN114800161B (en) | 2023-08-15 |
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Denomination of invention: A clamping fixture and clamping method for machining tenon joints of turbine working blades Granted publication date: 20230815 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 |