CN116749078A - Abrasive flow clamp for centrifugal impeller - Google Patents
Abrasive flow clamp for centrifugal impeller Download PDFInfo
- Publication number
- CN116749078A CN116749078A CN202310720836.8A CN202310720836A CN116749078A CN 116749078 A CN116749078 A CN 116749078A CN 202310720836 A CN202310720836 A CN 202310720836A CN 116749078 A CN116749078 A CN 116749078A
- Authority
- CN
- China
- Prior art keywords
- centrifugal impeller
- pressing ring
- columnar body
- guide sleeve
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003825 pressing Methods 0.000 claims abstract description 80
- 239000002245 particle Substances 0.000 claims abstract description 8
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 238000000227 grinding Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 230000006978 adaptation Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 description 10
- 238000005498 polishing Methods 0.000 description 7
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000006061 abrasive grain Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003190 viscoelastic substance Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
- B24B31/116—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using plastically deformable grinding compound, moved relatively to the workpiece under the influence of pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention relates to a centrifugal impeller abrasive particle flow clamp, which comprises an upper guide sleeve, a lower guide sleeve, an upper pressing plate and an upper pressing ring which are arranged in the upper guide sleeve, and a lower pressing ring and a lower pressing block which are arranged in the lower guide sleeve; the center of going up the clamping ring is equipped with the through-hole with centrifugal impeller boss tight fit, down the briquetting include with centrifugal impeller inlet rim plate lateral surface matched with first column body, the top of this first column body is equipped with centrifugal impeller shaft hole tight fit's second column body, down the center of clamping ring be equipped with down the first column body tight fit's of briquetting through-hole, the up end of this clamping ring be equipped with centrifugal impeller inlet side looks adaptation horn mouth down, centrifugal impeller's annular boss is pegged graft in the through-hole of last clamping ring during the assembly, down the horn mouth cover of clamping ring is at centrifugal impeller inlet rim plate's lateral surface, the second column body of clamping ring inserts centrifugal impeller shaft hole down, can effectively prevent centrifugal impeller along its axial displacement or deflection in the grinding process, the impeller surface after the grinding is more even.
Description
Technical Field
The invention relates to the technical field of polishing of key parts of aeroengines, in particular to a centrifugal impeller abrasive flow clamp.
Background
In the aeroengine, as shown in fig. 1, a centrifugal impeller as a key part is composed of an exhaust side wheel disc 31, an intake side wheel disc 32, a plurality of twisting blades 33 and a plurality of dividing blades 34 which are coaxially arranged, shaft holes 35 penetrating through the shaft centers of the intake side wheel disc and the exhaust side wheel disc are formed in a protruding mode on the outer side of the exhaust side wheel disc to form an annular boss 36; the blade profile is mostly a complex free-form surface, and the blade body has the characteristics of bending, wide, glancing, twisting and thinness. With the development of the aviation industry, the number of blades in a centrifugal impeller mounted on an aeroengine is increased, the working condition is worse, with the improvement of the aerodynamic performance requirement, the space curved surface of the blade is more complex, and a plurality of factors determine that the surface of the blade must be polished after milling so as to meet the higher and higher blade profile processing requirement.
At present, the traditional mechanical special processing equipment mainly adopted for polishing the blade profile in China is manually finished by workers. The machining mode is unstable, the machining precision is not high, the consistency and the transplantability of the blade quality are difficult to ensure, the manual polishing is in place by one-time machining, the grinding allowance is large, the machining residual stress is also large, and the tissue structure of the blade material is easily damaged due to blade burn. The adoption of the abrasive particle flow polishing technology is an important development direction of the blade disc and blade polishing technology. Abrasive flow machining (Abrasive Flow Machining, AFM for short) is a new process technique for surface polishing and deburring a workpiece with a viscoelastic material having fluidity composed of a polymer carrier and abrasive, also referred to as extrusion honing or abrasive flow machining in China. In the process of polishing abrasive particle flow, the clamp is a very important part, and the quality, efficiency and the like of the process are related. The abrasive flow fixture is used to secure a workpiece and direct abrasive to a surface to be machined. The clamp also serves as a sealing runner to bear the pressing force on the workpiece which cannot bear the pressing force. A simple workpiece may not require a fixture, but for abrasive particle stream machining of a complex geometry workpiece, a fixture is an important factor in the success or failure of the machining.
In the abrasive flow clamp in the prior art, an upper pressing plate and a lower pressing plate are generally adopted to press a part to be processed, so that the displacement of the part in the flowing direction of an abrasive is prevented, and the surface quality of the part is prevented from being influenced; however, due to the structural specificity of the centrifugal impeller, the axial flowing state of the abrasive in the fixture is not fully considered during abrasive flow machining, so that the centrifugal impeller is displaced, uneven grinding is caused, a sunny and shady surface is extremely easy to cause, and the surface quality cannot meet the use requirement.
Disclosure of Invention
The invention aims to solve the technical problem of providing the abrasive flow clamp for the centrifugal impeller, which has a simple structure, is easy to assemble and can effectively prevent the centrifugal impeller from axially displacing.
In order to solve the problems, the invention provides a centrifugal impeller abrasive particle flow clamp, which comprises an upper guide sleeve and a lower guide sleeve, wherein the inner cavity of the upper guide sleeve is cylindrical, an upper pressing plate and an upper pressing ring are arranged in the upper guide sleeve, and a lower pressing ring and a lower pressing block are arranged in the lower guide sleeve; the center of going up the clamping ring is equipped with the through-hole with centrifugal impeller annular boss tight fit, down the briquetting include with centrifugal impeller inlet rim plate lateral surface matched with first column body, the top of this first column body be equipped with centrifugal impeller shaft hole tight fit's second column body, down the center of clamping ring be equipped with down the first column body tight fit's of briquetting through-hole, the up end of this lower clamping ring be equipped with centrifugal impeller inlet side looks adaptation horn mouth, the annular boss of centrifugal impeller is pegged graft in the through-hole of last clamping ring during the assembly, the lower terminal surface of going up the clamping ring compresses tightly to centrifugal impeller exhaust rim plate's lateral surface, the up end of upper clamping plate and last clamping ring is fixed to link to each other, the horn mouth cover of lower clamping ring is at centrifugal impeller inlet rim plate's lateral surface, the second column body of lower clamping ring inserts centrifugal impeller shaft hole, the up end of first column body forms to compress tightly with centrifugal impeller inlet rim plate's lower terminal surface fixedly, down the clamping ring links to each other with lower terminal surface down, go up clamping ring, down clamping ring and lower matched with compresses tightly centrifugal impeller, can prevent effectively that centrifugal impeller from being in grinding the process along its axial displacement or deflection back surface more evenly.
Further, the upper pressing plate and the upper pressing ring are provided with threaded holes uniformly distributed in the circumferential direction, and the upper pressing plate and the upper pressing ring are fixedly connected through bolts.
Further, the bottom of the first columnar body of the lower pressing block is provided with an annular lower baffle, the diameter of the annular lower baffle is larger than that of the first columnar body, the lower end face of the lower pressing ring and the annular lower baffle are provided with threaded holes uniformly distributed in the circumferential direction, and the lower pressing block is fixedly connected with the annular lower baffle by bolts.
Further, the inner walls of the upper flow guiding sleeve and the lower flow guiding sleeve are made of polytetrafluoroethylene plastic, the outer walls of the upper flow guiding sleeve and the lower flow guiding sleeve are made of 45# steel, the shapes of the upper flow guiding sleeve and the lower flow guiding sleeve are guaranteed, meanwhile, the wear resistance is good, the lubricity is high, and the abrasive materials can pass through easily.
Further, the upper pressing plate, the upper pressing ring, the lower pressing block and the lower pressing ring are integrally turned and formed by adopting PA6 nylon, so that the wear resistance is good, the structure is simple, the manufacturing is easy, and the cost is low.
Further, the first columnar body and the second columnar body are coaxially arranged, at least a threaded blind hole is formed in the second columnar body, and a bolt penetrates through a shaft hole of the centrifugal impeller to be matched with the threaded blind hole during assembly, so that the centrifugal impeller is fixedly connected with the lower pressing block.
The invention has the technical effects that: (1) Compared with the prior art, the abrasive particle flow clamp for the centrifugal impeller has the advantages that the upper pressing plate, the upper pressing ring, the lower pressing block and the lower pressing ring are matched to simultaneously compress the radial direction and the axial direction of the centrifugal impeller, so that the phenomenon that the surface of a blade is uneven due to displacement of the centrifugal impeller during grinding is avoided; (2) The inner walls of the upper guide sleeve and the lower guide sleeve are made of polytetrafluoroethylene plastic, so that the abrasive is good in wear resistance and high in lubricity, and the abrasive can pass through the guide sleeve and the lower guide sleeve conveniently; (3) The upper pressing plate, the upper pressing ring, the lower pressing block and the lower pressing ring are integrally turned and formed by adopting PA6 nylon, so that the wear resistance is good, the structure is simple, the manufacturing is easy, and the cost is low.
Drawings
The invention is described in further detail below with reference to the drawings of the specification:
FIG. 1 is a schematic perspective view of a centrifugal impeller;
FIG. 2 is a sectional view of the assembled structure of the abrasive flow clamp of the centrifugal impeller of the present invention;
FIG. 3 is a schematic perspective view of a lower press block of the present invention;
FIG. 4 is a schematic perspective view of an upper press ring of the present invention;
fig. 5 is a schematic perspective view of the lower pressure ring of the present invention.
In the figure: the upper flow guiding sleeve 1, the lower flow guiding sleeve 2, the centrifugal impeller 3, the exhaust side wheel disc 31, the intake side wheel disc 32, the twisted blades 33, the splitter blades 34, the shaft hole 35, the annular boss 36, the upper pressing plate 4, the upper pressing ring 5, the threaded hole 51, the bolt 52, the lower pressing block 6, the lower baffle 61, the first columnar body 62, the second columnar body 63, the threaded blind hole 64, the lower pressing ring 7 and the horn mouth 71.
Detailed Description
Example 1
As shown in fig. 2, the abrasive grain flow clamp for the centrifugal impeller of the embodiment comprises an upper guide sleeve 1 and a lower guide sleeve 2, wherein the inner cavities of the upper guide sleeve 1 and the lower guide sleeve 2 are cylindrical, the inner walls of the upper guide sleeve 1 and the lower guide sleeve 2 are made of polytetrafluoroethylene plastics, and the outer walls of the upper guide sleeve 1 and the lower guide sleeve 2 are made of 45# steel; an upper pressing plate 4 and an upper pressing ring 5 which are arranged in the upper diversion sleeve 1, and a lower pressing ring 7 and a lower pressing block 6 which are arranged in the lower diversion sleeve 2; the upper pressing plate 4, the upper pressing ring 5, the lower pressing block 6 and the lower pressing ring 7 are integrally turned and formed by adopting PA6 nylon; as shown in fig. 4, a through hole tightly matched with the annular boss 36 of the centrifugal impeller is arranged in the center of the upper pressing ring 5, the upper pressing plate 4 and the upper pressing ring 5 are provided with threaded holes 51 uniformly distributed in the circumferential direction, and the upper pressing plate 4 and the upper pressing ring 5 are fixedly connected by bolts 52; as shown in fig. 3, the lower pressing block 6 includes a first columnar body 62 matched with the outer side surface of the inlet rim plate 31 of the centrifugal impeller, a second columnar body 63 tightly matched with the axial hole 35 of the centrifugal impeller is arranged at the top end of the first columnar body 62, the first columnar body 62 and the second columnar body 63 are coaxially arranged, a threaded blind hole 64 is arranged in the second columnar body 63, an annular lower baffle 61 is arranged at the bottom end of the first columnar body 62 of the lower pressing block 6, the diameter of the annular lower baffle 61 is larger than that of the first columnar body 62, a through hole tightly matched with the first columnar body 62 of the lower pressing block 6 is arranged at the center of the lower pressing ring 7, a horn mouth 71 matched with the inlet side of the centrifugal impeller 3 is arranged at the upper end surface of the lower pressing ring 7, the annular lower baffle 61 is provided with a threaded hole uniformly distributed circumferentially, and the lower pressing block 6 is fixedly connected with the lower annular lower baffle 61 by bolts.
The annular boss 36 of the centrifugal impeller 3 is inserted into the through hole of the upper pressure ring 5 during assembly, the lower end surface of the upper pressure ring 5 is tightly pressed against the outer side surface of the centrifugal impeller exhaust side wheel disc 32, the upper pressure plate 4 is fixedly connected with the upper end surface of the upper pressure ring 5 through bolts 52, the horn mouth 71 of the lower pressure ring 7 is sleeved on the outer side surface of the centrifugal impeller intake side wheel disc 31, the second cylindrical body 63 of the lower pressure block 6 is inserted into the centrifugal impeller shaft hole 35, the upper end surface of the first cylindrical body 62 is tightly pressed against the outer side surface of the centrifugal impeller intake side wheel disc 32, the lower pressure block 6 is fixedly connected with the lower end surface of the lower pressure ring 7 through bolts, and the bolts penetrate through the shaft hole 35 of the centrifugal impeller 3 and are matched with the threaded blind holes 64 so as to fixedly connect the centrifugal impeller 3 with the lower pressure block 6; the exhaust side wheel disc 31 of the centrifugal impeller 3, the upper pressing plate 4 and the upper pressing ring 5 on the outer side of the exhaust side wheel disc 31 of the centrifugal impeller are arranged in the upper diversion sleeve 1, and the air inlet side wheel disc 32, the twisted blades 33, the splitter blades 34, the lower pressing ring 7 and the lower pressing block 6 on the inner side of the exhaust side wheel disc 31 of the centrifugal impeller are arranged in the lower diversion sleeve 2; the gap between the inner wall of the bottom end of the upper guide sleeve 1 and the exhaust side wheel disc 31 of the centrifugal impeller 3 is 0.5mm, the gap between the horn mouth 71 of the lower pressing ring 7 and the outer side surface of the intake side wheel disc 32 of the centrifugal impeller is 0.5mm, the parts are convenient to take and place, and meanwhile, abrasive materials are prevented from flowing in assembled gaps, and then the blades are extruded, so that the blades deform.
It is apparent that the above examples are merely illustrative of the present invention and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While remaining within the scope of the invention, obvious variations or modifications are incorporated by reference herein.
Claims (4)
1. A centrifugal impeller abrasive flow fixture, comprising: an upper guide sleeve (1) and a lower guide sleeve (2) with cylindrical inner cavities, an upper pressing plate (4) and an upper pressing ring (5) which are arranged in the upper guide sleeve (1), and a lower pressing ring (7) and a lower pressing block (6) which are arranged in the lower guide sleeve (2); the center of the upper pressing ring (5) is provided with a through hole tightly matched with the annular boss (36) of the centrifugal impeller, the lower pressing ring (6) comprises a first columnar body (62) matched with the outer side surface of the air inlet side wheel disc (32) of the centrifugal impeller, the top end of the first columnar body (62) is provided with a second columnar body (63) tightly matched with the shaft hole (35) of the centrifugal impeller, the center of the lower pressing ring (7) is provided with a through hole tightly matched with the first columnar body (62) of the lower pressing ring (6), and the upper end surface of the lower pressing ring (7) is provided with a horn mouth (71) matched with the air inlet side of the centrifugal impeller;
the first columnar body (62) and the second columnar body (63) are coaxially arranged, and at least the second columnar body (63) is internally provided with a threaded blind hole (64); when in assembly, the bolts pass through the shaft holes (35) of the centrifugal impeller (3) to be matched with the threaded blind holes (64).
2. The centrifugal impeller abrasive particle flow clamp according to claim 1, wherein the upper pressing plate (4) and the upper pressing ring (5) are provided with threaded holes (51) which are uniformly distributed in the circumferential direction, and bolts (52) are used for fixedly connecting the upper pressing plate (4) and the upper pressing ring (5).
3. The centrifugal impeller abrasive particle flow clamp according to claim 2, wherein an annular lower baffle (61) is arranged at the bottom end of the first columnar body (62) of the lower pressing block, the diameter of the annular lower baffle (61) is larger than that of the first columnar body (62), the lower end face of the lower pressing ring (7) and the annular lower baffle (61) are provided with threaded holes uniformly distributed in the circumferential direction, and the annular lower baffle (61) is fixedly connected with the lower pressing ring (7) through bolts.
4. A centrifugal impeller abrasive flow clamp according to claim 3, wherein the upper pressing plate (4), the upper pressing ring (5), the lower pressing block (6) and the lower pressing ring (7) are integrally turned and formed by PA6 nylon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310720836.8A CN116749078A (en) | 2016-06-16 | 2016-06-16 | Abrasive flow clamp for centrifugal impeller |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310720836.8A CN116749078A (en) | 2016-06-16 | 2016-06-16 | Abrasive flow clamp for centrifugal impeller |
| CN201610430312.5A CN107511755B (en) | 2016-06-16 | 2016-06-16 | Abrasive flow clamp for centrifugal impeller |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610430312.5A Division CN107511755B (en) | 2016-06-16 | 2016-06-16 | Abrasive flow clamp for centrifugal impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116749078A true CN116749078A (en) | 2023-09-15 |
Family
ID=60720659
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610430312.5A Active CN107511755B (en) | 2016-06-16 | 2016-06-16 | Abrasive flow clamp for centrifugal impeller |
| CN202310721140.7A Pending CN116533137A (en) | 2016-06-16 | 2016-06-16 | Abrasive flow clamp for centrifugal impeller |
| CN202310720836.8A Pending CN116749078A (en) | 2016-06-16 | 2016-06-16 | Abrasive flow clamp for centrifugal impeller |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610430312.5A Active CN107511755B (en) | 2016-06-16 | 2016-06-16 | Abrasive flow clamp for centrifugal impeller |
| CN202310721140.7A Pending CN116533137A (en) | 2016-06-16 | 2016-06-16 | Abrasive flow clamp for centrifugal impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN107511755B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108326724B (en) * | 2017-12-28 | 2019-12-24 | 西安航天发动机有限公司 | 3D prints air turbine casing abrasive particle stream finishing processingequipment |
| CN109352892B (en) * | 2018-09-29 | 2023-09-08 | 鸿浩泵业有限公司 | Pressing die and pressing method for vinylidene fluoride impeller with movable ring |
| CN110026880A (en) * | 2019-04-15 | 2019-07-19 | 中国电子科技集团公司第二十研究所 | The inner surface abrasive Flow of 3D printing thin wall special-shaped electromagnetic horn polishes tooling |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003415B (en) * | 2010-11-24 | 2012-11-21 | 无锡杰尔压缩机有限公司 | Structure for clamping single-stage high-speed centrifugal fan impeller |
| CN102152244B (en) * | 2010-12-27 | 2012-11-14 | 大连工业大学 | Special clamp for abrasive flow polishing of narrow flow passage closed impeller flow passage |
| CN202037425U (en) * | 2011-03-22 | 2011-11-16 | 无锡太博泵业有限公司 | Die used for impeller welding |
| CN103707198B (en) * | 2014-01-10 | 2016-02-24 | 常州兰翔机械有限责任公司 | A kind of centrifugal impeller combination blast shield jig |
| CN104786080B (en) * | 2015-05-07 | 2017-03-01 | 哈尔滨理工大学 | Based on the integral wheel shock reducing type flexible jig of five-axis robot and the method for vibration damping |
| CN205685186U (en) * | 2016-06-16 | 2016-11-16 | 常州兰翔机械有限责任公司 | A kind of centrifugal impeller abrasive Flow fixture |
-
2016
- 2016-06-16 CN CN201610430312.5A patent/CN107511755B/en active Active
- 2016-06-16 CN CN202310721140.7A patent/CN116533137A/en active Pending
- 2016-06-16 CN CN202310720836.8A patent/CN116749078A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN116533137A (en) | 2023-08-04 |
| CN107511755B (en) | 2023-07-18 |
| CN107511755A (en) | 2017-12-26 |
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