CN108608195B - Bush press-fitting device - Google Patents
Bush press-fitting device Download PDFInfo
- Publication number
- CN108608195B CN108608195B CN201810905841.5A CN201810905841A CN108608195B CN 108608195 B CN108608195 B CN 108608195B CN 201810905841 A CN201810905841 A CN 201810905841A CN 108608195 B CN108608195 B CN 108608195B
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- China
- Prior art keywords
- press
- fit
- cylinder
- bushing
- shifting fork
- 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.)
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- 239000000463 material Substances 0.000 claims abstract description 97
- 230000007246 mechanism Effects 0.000 claims abstract description 44
- 230000000903 blocking effect Effects 0.000 claims description 24
- 238000005452 bending Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 8
- 230000003139 buffering effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/001—Article feeders for assembling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/001—Article feeders for assembling machines
- B23P19/004—Feeding the articles from hoppers to machines or dispensers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
Abstract
The invention discloses a bushing press-fitting device, which comprises a rack, wherein a shifting fork fixing jig is arranged in the middle of the upper end of the rack, and a profiling groove corresponding to a shifting fork is formed in the surface of the shifting fork fixing jig; the automatic shifting fork fixing device is characterized in that press-fitting mechanisms are arranged on two transverse sides of the shifting fork fixing jig, feeding mechanisms are arranged on one longitudinal side of each press-fitting mechanism, and material moving mechanisms are longitudinally distributed between the feeding mechanisms and the press-fitting mechanisms. The beneficial effects are that: adopt duplex operation, can realize the automatic feed of bush, move material and pressure equipment, easy operation is convenient, greatly reduced operating personnel's amount of labour, improved the operation security, help improving production efficiency.
Description
Technical Field
The invention relates to the technical field of automobile part production devices, in particular to a bushing press-fitting device.
Background
In the production process of a shifting fork for shifting an automobile gearbox, the pin holes at the two ends of a shifting fork body are required to be pressed into a bushing. Because the shape of the product is quite different, the shifting fork body is manually taken at present, the shifting fork body is put into the bushing and then put into the press for press fitting in place, and then the other bushing is turned over and pressed, so that the production efficiency is influenced, and the safety risk of operators is improved.
Disclosure of Invention
The invention aims to solve the problems and provide a bushing press-fitting device, which solves the technical problems that in the prior art, a shifting fork body is manually taken, a bushing is put into a press for press-fitting in place, and then another bushing is turned over and pressed, so that the production efficiency is influenced, the safety risk of an operator is improved, and the like. According to the technical scheme, the double-station operation is adopted, so that automatic feeding, material moving and press fitting of the bushing can be realized, the operation is simple and convenient, the labor capacity of operators is greatly reduced, the operation safety is improved, the production efficiency is improved, and the like are facilitated.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides a bushing press-fitting device which comprises a rack, wherein a shifting fork fixing jig is arranged in the middle of the upper end of the rack, and a profiling groove corresponding to a shifting fork is formed in the surface of the shifting fork fixing jig; the device comprises a shifting fork fixing jig, a pressing mechanism, a feeding mechanism, a shifting mechanism and a shifting mechanism, wherein the pressing mechanism is arranged on two lateral sides of the shifting fork fixing jig, the feeding mechanism is arranged on one longitudinal side of the pressing mechanism, and the shifting mechanism is longitudinally distributed between the feeding mechanism and the pressing mechanism;
the press-mounting mechanism comprises a press-mounting cylinder, wherein the output end of the press-mounting cylinder is provided with a mounting clamping head, the inside of the mounting clamping head is provided with a press-mounting column, and the outer end part of the press-mounting column is provided with a clamping column;
the feeding mechanism comprises a vibration feeding disc, a material guide pipe is arranged at the outlet end of the vibration feeding disc, the end part of the material guide pipe is of a bending structure, and the outlet end of the material guide pipe is vertically downward;
the material moving mechanism comprises a material moving cylinder, a bearing plate is arranged at the upper end of the material moving cylinder, a jacking cylinder and a bearing block are respectively arranged at the transverse end part and the longitudinal end part of the bearing plate, material blocking rods are arranged at the upper end of the bearing block, the material blocking rods are distributed along the longitudinal direction, and the material blocking rods are positioned below the outlet end of the material guiding pipe; the lifting cylinder is vertically arranged, a placement seat is arranged at the output end of the lifting cylinder, the placement seat is collinear with the material blocking rod in the longitudinal direction, and a clamping groove is formed in the surface of the placement seat.
By adopting the bushing press-fitting device, when the device is in an initial state, the placing seat is positioned below the outlet end of the material guide pipe, and when the device is used, the shifting fork is placed in the profiling groove on the surface of the shifting fork fixing jig, under the vibration action of the vibration feeding disc, the bushing falls into the clamping groove through the material guide pipe, the material moving cylinder works to drive the placing seat and the material blocking rod to move until the axis of the clamping groove on the surface of the placing seat is in the same plane with the axis of the press-fitting column, in the moving process, the outlet end of the material guide pipe is sealed through the material blocking rod, the jacking cylinder works to drive the placing seat to ascend until the axis of the clamping groove on the surface of the placing seat is collinear with the axis of the press-fitting column, at the moment, the press-fitting cylinder is pushed to enable the clamping column to be inserted into the inside, the jacking cylinder and the material blocking rod are sequentially restored to be in the same, and the shifting fork is driven to be pressed into the two press-fitting cylinders through the pin holes to complete the press-fitting of the bushing; the device adopts duplex operation, can realize automatic feed, material removal and the pressure equipment of bush, and easy operation is convenient, greatly reduced operating personnel's amount of labour, improved the operation security, help improving production efficiency.
Preferably, the outer diameter of the clamping column is equal to the inner diameter of the bushing, and the outer diameter of the press-fit column is larger than the inner diameter of the bushing.
Preferably, a buffer plate is arranged between the vibration feeding disc and the surface of the frame.
Preferably, a supporting frame for supporting the material guiding pipe is installed at the upper end of the buffer plate.
Preferably, the width dimension of the inner wall of the material guiding pipe is equal to the maximum outer diameter dimension of the lining.
Preferably, the material moving cylinder is a double-shaft cylinder, two output ends of the material moving cylinder are fixedly arranged, and a cylinder body of the material moving cylinder moves.
Preferably, the upper surface of the blocking rod is flush with the outlet end of the material guiding pipe.
Preferably, a dislocation cylinder is installed at the upper end of the frame, the dislocation cylinder is located on one lateral side of the outlet end of the material guiding pipe, and the height position of the output end of the dislocation cylinder is located at a position, above the bushing station, of the outlet end of the material guiding pipe.
Preferably, the clamping groove is in clearance fit with the bushing.
Preferably, an even number of height-adjusting support legs are symmetrically arranged at the bottom end of the frame.
The beneficial effects are that: adopt duplex operation, can realize the automatic feed of bush, move material and pressure equipment, easy operation is convenient, greatly reduced operating personnel's amount of labour, improved the operation security, help improving production efficiency.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is an enlarged schematic view of the three-dimensional structure of the feeding mechanism and the shifting mechanism of the invention;
FIG. 3 is an enlarged schematic top view of the placement base structure of the present invention;
fig. 4 is an enlarged schematic view of the press-fitting mechanism of the present invention.
The reference numerals are explained as follows:
1. a frame; 101. height-adjusting support legs; 2. a shifting fork fixing jig; 3. a material moving mechanism; 301. a material moving cylinder; 302. a carrying plate; 303. a dislocation cylinder; 304. a material blocking rod; 305. a bearing block; 306. a placement seat; 307. jacking the air cylinder; 308. a clamping groove; 4. a press-fitting mechanism; 401. a cylinder is pressed and assembled; 402. clamping head; 403. press-fitting the column; 404. a clamping column; 5. a feeding mechanism; 501. a support frame; 502. a buffer plate; 503. vibrating the feeding tray; 504. and a material guiding pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
Referring to fig. 1-4, the invention provides a bushing press-fitting device, which comprises a frame 1, wherein a shifting fork fixing jig 2 is arranged in the middle of the upper end of the frame 1, and a profiling groove corresponding to a shifting fork is formed in the surface of the shifting fork fixing jig 2; the pressing mechanism 4 is arranged on two lateral sides of the shifting fork fixing jig 2, the feeding mechanism 5 is arranged on one longitudinal side of the pressing mechanism 4, and the material moving mechanism 3 is longitudinally distributed between the feeding mechanism 5 and the pressing mechanism 4;
the press-fitting mechanism 4 comprises a press-fitting cylinder 401, a press-fitting chuck 402 is arranged at the output end of the press-fitting cylinder 401, a press-fitting column 403 is arranged in the press-fitting chuck 402, and a clamping column 404 is arranged at the outer end part of the press-fitting column 403;
the feeding mechanism 5 comprises a vibration feeding disc 503, a material guiding pipe 504 is arranged at the outlet end of the vibration feeding disc 503, the end part of the material guiding pipe 504 is in a bending structure, and the outlet end of the material guiding pipe 504 is vertically downward;
the material moving mechanism 3 comprises a material moving cylinder 301, a bearing plate 302 is arranged at the upper end of the material moving cylinder 301, a jacking cylinder 307 and a bearing block 305 are respectively arranged at the transverse end and the longitudinal end of the bearing plate 302, material blocking rods 304 are arranged at the upper end of the bearing block 305, the material blocking rods 304 are distributed along the longitudinal direction, and the material blocking rods 304 are positioned below the outlet end of the material guiding pipe 504; the jacking cylinder 307 is vertically installed, a placing seat 306 is installed at the output end of the jacking cylinder 307, the placing seat 306 is collinear with the material blocking rod 304 in the longitudinal direction, and a clamping groove 308 is formed in the surface of the placing seat 306.
As an alternative embodiment, the outer diameter of the clamping column 404 is equal to the inner diameter of the bushing, and the outer diameter of the press-fitting column 403 is larger than the inner diameter of the bushing, so that the accuracy of inserting the clamping column 404 into the bushing can be ensured, and the accuracy of press-fitting the clamping column 403 into the bushing can be ensured;
a buffer plate 502 is arranged between the vibration feeding disc 503 and the surface of the frame 1, so that the vibration feeding disc 503 can play a role in buffering, and the working stability of the vibration feeding disc 503 is ensured;
the upper end of the buffer plate 502 is provided with a supporting frame 501 for supporting the material guide pipe 504, so that the stability of the material guide pipe 504 can be improved, and the feeding stability of the feeding mechanism 5 is ensured;
the width dimension of the inner wall of the material guide pipe 504 is equal to the maximum outer diameter dimension of the bushing, so that the bushing can slide in the material guide pipe 504 conveniently, the bushing is prevented from overlapping, the feeding of a single bushing is ensured, and the normal operation of the device is ensured;
the material moving cylinder 301 is a double-shaft cylinder, two output ends of the material moving cylinder 301 are fixedly arranged, and a cylinder body of the material moving cylinder 301 moves, so that the material moving cylinder 301 can drive the bearing plate 302 to reciprocate stably, and automatic material moving of the bushing is assisted;
the upper surface of the blocking rod 304 is flush with the outlet end of the material guide pipe 504, so that the sealing effect of the blocking rod 304 on the outlet end of the material guide pipe 504 can be ensured;
the upper end of the frame 1 is provided with a dislocation cylinder 303, the dislocation cylinder 303 is positioned at one lateral side of the outlet end of the material guiding pipe 504, the height position of the outlet end of the dislocation cylinder 303 is positioned at the position of a bushing station upwards from the outlet end of the material guiding pipe 504, and the arrangement is that when feeding is carried out, the dislocation cylinder 303 is used for pressing the material guiding pipe 504, so that only one bushing is ensured to slide out from the outlet end of the material guiding pipe 504, and the normal operation of the device is ensured;
the clamping groove 308 is in clearance fit with the bushing, so that the fixing stability of the clamping groove 308 to the bushing can be ensured, and the accuracy of the bushing press fitting can be ensured;
an even number of height-adjusting support legs 101 are symmetrically arranged at the bottom end of the frame 1, leveling of the device can be achieved through the height-adjusting support legs 101, and stable operation of the device is guaranteed.
With the structure, when the device is in the initial state, the placing seat 306 is positioned below the outlet end of the material guide pipe 504, and when the device is used, the shifting fork is placed in the profiling groove on the surface of the shifting fork fixing jig 2, under the vibration action of the vibration feeding disc 503, the bushing falls into the clamping groove 308 through the material guide pipe 504, the material moving cylinder 301 works to drive the placing seat 306 and the material blocking rod 304 to move until the axis of the clamping groove 308 on the surface of the placing seat 306 is in the same plane with the axis of the press-fitting column 403, in the moving process, the outlet end of the material guide pipe 504 is sealed through the material blocking rod 304, the jacking cylinder 307 works to drive the placing seat 306 to ascend until the axis of the clamping groove 308 on the surface of the placing seat 306 is collinear with the axis of the press-fitting column 403, at this moment, the press-fitting cylinder 401 is pushed to enable the clamping column 404 to be inserted into the bushing, at this moment, the jacking cylinder 307 and the material moving cylinder 301 are sequentially restored to the original position, the press-fitting cylinder 401 continues to drive the press-fitting column 403 to move until the shifting fork 403 is pressed into the pin holes at the two ends of the bushing body through the press-fitting column 403; the device adopts duplex operation, can realize automatic feed, material removal and the pressure equipment of bush, and easy operation is convenient, greatly reduced operating personnel's amount of labour, improved the operation security, help improving production efficiency.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. Bushing press-fitting device, including frame (1), its characterized in that: a shifting fork fixing jig (2) is arranged in the middle of the upper end of the frame (1), and a profiling groove corresponding to the shifting fork is formed in the surface of the shifting fork fixing jig (2); the automatic feeding device is characterized in that press-fitting mechanisms (4) are arranged on two lateral sides of the shifting fork fixing jig (2), a feeding mechanism (5) is arranged on one longitudinal side of each press-fitting mechanism (4), and a material moving mechanism (3) is longitudinally distributed between each feeding mechanism (5) and each press-fitting mechanism (4);
the press-fit mechanism (4) comprises a press-fit cylinder (401), a press-fit clamp head (402) is arranged at the output end of the press-fit cylinder (401), a press-fit column (403) is arranged in the press-fit clamp head (402), and a clamp column (404) is arranged at the outer end part of the press-fit column (403);
the feeding mechanism (5) comprises a vibration feeding disc (503), a material guide pipe (504) is arranged at the outlet end of the vibration feeding disc (503), the end part of the material guide pipe (504) is in a bending structure, and the outlet end of the material guide pipe (504) is vertically downward;
the material moving mechanism (3) comprises a material moving cylinder (301), a bearing plate (302) is arranged at the upper end of the material moving cylinder (301), a jacking cylinder (307) and a bearing block (305) are respectively arranged at the transverse end and the longitudinal end of the bearing plate (302), material blocking rods (304) are arranged at the upper end of the bearing block (305), the material blocking rods (304) are distributed along the longitudinal direction, and the material blocking rods (304) are positioned below the outlet end of the material guide pipe (504); the jacking cylinder (307) is vertically arranged, a placing seat (306) is arranged at the output end of the jacking cylinder (307), the placing seat (306) and the material blocking rod (304) are collinear in the longitudinal direction, a clamping groove (308) is arranged on the surface of the placing seat (306),
the material moving cylinder (301) is a double-shaft cylinder, two output ends of the material moving cylinder (301) are fixedly arranged, a cylinder body of the material moving cylinder (301) moves,
when the device is used, the shifting fork is placed in the profiling groove on the surface of the shifting fork fixing jig (2), under the vibration action of the vibration feeding disc (503), the lining falls into the clamping groove (308) through the material guide pipe (504),
the material moving cylinder (301) works to drive the placing seat (306) and the material blocking rod (304) to move until the axis of the clamping groove (308) on the surface of the placing seat (306) and the axis of the press-fit column (403) are positioned in the same plane, in the moving process, the outlet end of the material guiding pipe (504) is sealed through the material blocking rod (304),
the lifting air cylinder (307) works to drive the placing seat (306) to ascend until the axis of the clamping groove (308) on the surface of the placing seat (306) is collinear with the axis of the press-fit column (403),
at the moment, the press-fit cylinder (401) works, the press-fit column (403) is pushed, the clamping column (404) is inserted into the bushing, at the moment, the jacking cylinder (307) and the material moving cylinder (301) are sequentially restored to the original positions, the press-fit cylinder (401) continues to drive the press-fit column (403) to move until the bushing is pressed into pin holes at two ends of the shifting fork body through the press-fit column (403), and therefore press-fit of the bushing is completed;
a buffer plate (502) is arranged between the vibration feeding disc (503) and the surface of the frame (1),
the upper end of the buffer plate (502) is provided with a supporting frame (501) for supporting the material guide pipe (504).
2. The bushing press-fit device of claim 1, wherein: the outer diameter of the clamping column (404) is equal to the inner diameter of the bushing, and the outer diameter of the press-fit column (403) is larger than the inner diameter of the bushing.
3. The bushing press-fit device of claim 1, wherein: the inner wall width dimension of the material guiding pipe (504) is equal to the maximum outer diameter dimension of the lining.
4. The bushing press-fit device of claim 1, wherein: the upper surface of the material blocking rod (304) is flush with the outlet end of the material guiding pipe (504).
5. The bushing press-fit device of claim 1, wherein: the upper end of the frame (1) is provided with a dislocation cylinder (303), the dislocation cylinder (303) is positioned at one lateral side of the outlet end of the material guiding pipe (504), and the height position of the output end of the dislocation cylinder (303) is positioned at the position, above the bushing station, of the outlet end of the material guiding pipe (504).
6. The bushing press-fit device of claim 1, wherein: the snap-fit groove (308) is in clearance fit with the bushing.
7. The bushing press-fit device of claim 1, wherein: an even number of height-adjusting support legs (101) are symmetrically arranged at the bottom end of the frame (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810905841.5A CN108608195B (en) | 2018-08-10 | 2018-08-10 | Bush press-fitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810905841.5A CN108608195B (en) | 2018-08-10 | 2018-08-10 | Bush press-fitting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108608195A CN108608195A (en) | 2018-10-02 |
| CN108608195B true CN108608195B (en) | 2024-01-19 |
Family
ID=63666914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810905841.5A Active CN108608195B (en) | 2018-08-10 | 2018-08-10 | Bush press-fitting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108608195B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109514492B (en) * | 2018-11-08 | 2021-01-12 | 安徽岳塑汽车工业股份有限公司 | Bush press-fitting device |
| CN113909858A (en) * | 2021-09-30 | 2022-01-11 | 徐州云泰精密技术有限公司 | Automatic pressing device for automotive shifting fork pad assembly insert |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104690537A (en) * | 2015-02-26 | 2015-06-10 | 南通江华热动力机械有限公司 | Radiator bushing pressing machine |
| CN204997303U (en) * | 2015-09-27 | 2016-01-27 | 上海安宇峰实业有限公司 | Automatic bush device is worn to storage formula |
| CN106925975A (en) * | 2017-04-27 | 2017-07-07 | 安徽江淮汽车集团股份有限公司 | Bushing feed mechanism |
| CN208713317U (en) * | 2018-08-10 | 2019-04-09 | 无锡铭方科技有限公司 | A kind of bushing press-mounting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2911933B1 (en) * | 2007-01-26 | 2009-05-01 | Snecma Sa | DEVICE FOR ASSEMBLING TWO ASSEMBLIES, FOR EXAMPLE FOR TURBOMACHINE STATOR |
-
2018
- 2018-08-10 CN CN201810905841.5A patent/CN108608195B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104690537A (en) * | 2015-02-26 | 2015-06-10 | 南通江华热动力机械有限公司 | Radiator bushing pressing machine |
| CN204997303U (en) * | 2015-09-27 | 2016-01-27 | 上海安宇峰实业有限公司 | Automatic bush device is worn to storage formula |
| CN106925975A (en) * | 2017-04-27 | 2017-07-07 | 安徽江淮汽车集团股份有限公司 | Bushing feed mechanism |
| CN208713317U (en) * | 2018-08-10 | 2019-04-09 | 无锡铭方科技有限公司 | A kind of bushing press-mounting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108608195A (en) | 2018-10-02 |
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