CN111266458A - Computer host backboard stamping die with temperature control device - Google Patents
Computer host backboard stamping die with temperature control device Download PDFInfo
- Publication number
- CN111266458A CN111266458A CN202010096994.7A CN202010096994A CN111266458A CN 111266458 A CN111266458 A CN 111266458A CN 202010096994 A CN202010096994 A CN 202010096994A CN 111266458 A CN111266458 A CN 111266458A
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- China
- Prior art keywords
- frame
- plate
- temperature control
- computer host
- backboard
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- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 38
- 230000008859 change Effects 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000000741 silica gel Substances 0.000 claims description 5
- 229910002027 silica gel Inorganic materials 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 241001233242 Lontra Species 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 238000004140 cleaning Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007306 turnover Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 7
- 239000012634 fragment Substances 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 210000002469 basement membrane Anatomy 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004379 membrane Anatomy 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/20—Storage arrangements; Piling or unpiling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Presses And Accessory Devices Thereof (AREA)
Abstract
The invention relates to the technical field of computer host backboard processing dies, in particular to a computer host backboard stamping die with a temperature control device, which comprises a mounting frame, wherein a bearing plate is arranged inside the mounting frame, a driving motor is arranged on the outer wall of the mounting frame, a backboard placing groove is formed in the surface of the bearing plate, a bottom film is arranged on the surface of the backboard placing groove, and a positioning slot is formed in the side wall of the bearing plate; the beneficial effects are that: according to the computer host backboard stamping die with the temperature control device, the turnover bearing plate is arranged in the mounting frame, the workpiece processing structures are arranged on two sides of the bearing plate, the bearing plate is turned over after the workpiece is processed to discharge the workpiece together with the scraps, the scraps fall into the material receiving frame through the material leaking screen plate, the workpiece falls onto the upper portion of the material leaking screen plate, and the workpiece is directly placed in the turned backboard placing groove, so that the process of manually cleaning the stamping scraps is saved.
Description
Technical Field
The invention relates to the technical field of computer host backboard processing dies, in particular to a computer host backboard stamping die with a temperature control device.
Background
The computer is commonly called as a computer, is a modern electronic computing machine for high-speed computing, can perform numerical computation and logic computation, has a memory function, is modern intelligent electronic equipment capable of automatically and high-speed processing mass data according to program operation, and has a host computer of a desktop computer as a processing terminal, wherein the host computer is usually placed in a case and is provided with a host computer back plate for connecting various connecting plugs;
when the computer mainboard back plate is processed, the computer mainboard back plate needs to correspond to a data port of a computer host, so the processing needs to be carried out by means of a stamping die, scraps punched by the traditional stamping die are inconvenient to clean, the scraps remained on the bottom die can influence the placement of a group of workpieces, and the workpieces are placed after the scraps are manually cleaned each time, so that the labor amount is large, and the time is long; and the surface temperature is high after the top die is repeatedly stamped, workers are easily scalded when the workers install workpieces due to overhigh temperature of the top die, potential safety hazards exist, and the service life of the top die is influenced.
Disclosure of Invention
The invention aims to provide a computer host backboard stamping die with a temperature control device, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a computer host backboard stamping die with a temperature control device comprises a mounting frame, wherein a bearing plate is arranged inside the mounting frame, a driving motor is arranged on the outer wall of the mounting frame, a backboard placing groove is formed in the surface of the bearing plate, a bottom film is arranged on the surface of the backboard placing groove, a positioning slot is formed in the side wall of the bearing plate, a supporting inserted bar is inserted inside the positioning slot and fixed on the surface of a connecting plate, the surface of the connecting plate is connected to the end part of a shaft body of an electric hydraulic rod, the electric hydraulic rod is fixed inside the mounting frame, the mounting frame is fixed on the outer wall of the mounting frame, a supporting leg is arranged on the bottom surface of the mounting frame, the bottom end of the supporting leg is fixed on the bottom plate of a material receiving frame, a connecting ring is sleeved on the rod body of the supporting leg, the connecting, the top die is fixed on the bottom surface of the temperature control frame, and the bottom surface of the temperature control frame is provided with a buffer frame.
Preferably, the mounting bracket is of a square frame structure, the supporting rotary columns are arranged on the side wall of the bearing plate and are rotatably connected in the rotating grooves, the rotating grooves are formed in the inner wall of the mounting bracket, the two supporting rotary columns are arranged and are symmetrically distributed about the center of the bearing plate, one of the supporting rotary columns is connected with the shaft of the driving motor, the two backboard placing grooves are formed in the two backboard placing grooves, and the two backboard placing grooves are symmetrically distributed about the height center of the bearing plate.
Preferably, the positioning slots are provided with two groups, the two groups of positioning slots are symmetrically distributed about the height center of the bearing plate, the supporting inserted rods are provided with a plurality of supporting inserted rods, the supporting inserted rods are distributed along the long edge of the connecting plate in an arrayed mode, and the connecting plate is of a square plate-shaped structure.
Preferably, the landing leg includes slope section and vertical section, connects the work or material rest to be a platform shape frame structure, and the surface of connecing the work or material rest is pegged graft and is had the shrouding, and the shrouding is "protruding" font platelike structure, and the shrouding surface is provided with the fix with screw on the outer wall that connects the work or material rest.
Preferably, the material leakage screen plate is of a square plate-shaped structure, the top surface of the material leakage screen plate is provided with the rubber column, the top surface of the rubber column is arc-shaped, the connecting rings are of a circular ring-shaped structure and are provided with four, and the four connecting rings are respectively fixed at four corners of the material leakage screen plate.
Preferably, be provided with the silica gel heat-conducting plate on the bottom plate top surface of control by temperature change frame, it has the heat conduction post to peg graft on the bottom plate of control by temperature change frame, and it has the fin to peg graft on the curb plate of control by temperature change frame, and is provided with the protection frame on the curb plate of control by temperature change frame, be provided with the exhaust fan on the curb plate of protection frame.
Preferably, the buffer frame includes the leading truck, and the outside cover of leading truck is equipped with the crane, and the bottom surface of leading truck is provided with the spacing ring, is provided with compression spring between spacing ring and the crane, and is provided with the baffle on the inner wall of crane.
Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable structure and strong functionality, and has the following advantages:
1. the turnover bearing plate is arranged in the mounting frame, and the workpiece processing structures are arranged on two sides of the bearing plate, so that the workpiece and the fragments are discharged together by turning the bearing plate after the workpiece is processed, the fragments fall into the material receiving frame through the material leakage screen plate, the workpiece falls onto the upper part of the material leakage screen plate, and the workpiece is directly placed in the turned-over backboard placing groove, so that the process of manually cleaning the stamping fragments is saved;
2. according to the computer host backboard stamping die with the temperature control device, the telescopic control supporting inserted bar is additionally arranged on the side wall of the bearing plate to brake the bearing plate, so that the bearing plate is prevented from being deviated in the pressing process of the top die;
3. according to the computer host backboard stamping die with the temperature control device, the temperature control frame is additionally arranged at the top of the top die to cool the fixed die, so that the phenomenon that the service life is influenced by the temperature rise of the top die is avoided, and workers are prevented from being scalded by the high-temperature top die.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the connection structure of the top mold and the temperature control frame according to the present invention;
FIG. 3 is a schematic view of the structure of the receiving rack of the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 2;
fig. 5 is an enlarged view of the structure at B in fig. 3.
In the figure: mounting bracket 1, driving motor 1001, loading board 2, support rotary column 201, rotation groove 202, backplate standing groove 3, basement membrane 4, positioning slot 5, support inserted bar 6, connecting plate 7, electronic hydraulic stem 8, mount 9, landing leg 10, connect work or material rest 11, shrouding 12, go-between 13, hourglass material otter board 14, rubber column 15, top mould 16, control by temperature change frame 17, silica gel heat-conducting plate 18, heat-conducting column 19, fin 20, protection frame 21, exhaust fan 22, buffer 23, leading truck 231, crane 232, spacing ring 233, compression spring 234, baffle 235.
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.
Referring to fig. 1 to 5, the present invention provides a technical solution: a computer host backboard stamping die with a temperature control device comprises a mounting frame 1, a bearing plate 2 is arranged inside the mounting frame 1, the mounting frame 1 is of a square frame structure, supporting rotary columns 201 are arranged on the side wall of the bearing plate 2, the supporting rotary columns 201 are rotatably connected in rotary grooves 202, the rotary grooves 202 are formed in the inner wall of the mounting frame 1, two supporting rotary columns 201 are arranged, the two supporting rotary columns 201 are symmetrically distributed about the center of the bearing plate 2, one of the supporting rotary columns 201 is connected with a shaft body of a driving motor 1001, two backboard placing grooves 3 are formed, the two backboard placing grooves 3 are symmetrically distributed about the height center of the bearing plate 2, the driving motor 1001 is welded on the outer wall of the mounting frame 1, a backboard placing groove 3 is formed in the surface of the bearing plate 2, a bottom film 4 is welded on the surface of the backboard placing groove 3, a backboard to be stamped is horizontally placed in the, an electric hydraulic rod 8 is started to push a connecting plate 7 to approach to the mounting frame 1, a supporting inserted rod 6 is inserted into a positioning slot 5, the bearing plate 2 is prevented from deviating in the stamping process, and a telescopic driving device connected to the top of the connecting plate 7 pushes the connecting plate 7 together with the supporting inserted rod 6 downwards to push the supporting inserted rod 6 to be matched with an opening on the surface of the bottom membrane 4 to stamp the backboard;
the bottom surface of the mounting rack 1 is welded with supporting legs 10, the bottom ends of the supporting legs 10 are welded on a bottom plate of a material receiving rack 11, each supporting leg 10 comprises an inclined section and a vertical section, the material receiving rack 11 is of a table-shaped frame structure, a sealing plate 12 is inserted on the surface of the material receiving rack 11, the sealing plate 12 is of a 'convex' plate-shaped structure, the surface of the sealing plate 12 is provided with a screw fixed on the outer wall of the material receiving rack 11, a connecting ring 13 is sleeved on a rod body of each supporting leg 10, the sleeved part is fixed through a screw or a rivet, the connecting ring 13 is welded on the side wall of a material leakage screen plate 14, the material leakage screen plate 14 is of a square plate-shaped structure, a rubber bearing plate 15 is arranged on the top surface of the material leakage screen plate 14, the top surface of the rubber post 15 is arc-shaped, the connecting rings 13 are of a circular, the punched workpiece and the scraps fall downwards from the back plate placing groove 3 to the upper part of the material leaking screen plate 14 and are supported by the rubber columns 15, when the workpiece is taken out, the scraps on the surface of the workpiece are shaken off, the scraps fall into the material receiving frame 11 through the material leaking screen plate 14, the screws on the surface of the sealing plate 12 are removed, the sealing plate 12 is removed from the side plate of the material receiving frame 11, and then the scraps are taken out of the material receiving frame 11;
the upper part of the mounting frame 1 is provided with a top die 16, the top die 16 is welded on the bottom surface of a temperature control frame 17, the top surface of the bottom plate of the temperature control frame 17 is provided with a silica gel heat conducting plate 18, the bottom plate of the temperature control frame 17 is spliced with a heat conducting column 19, a side plate of the temperature control frame 17 is spliced with a fin 20, the side plate of the temperature control frame 17 is provided with a protective frame 21, the side plate of the protective frame 21 is provided with an exhaust fan 22, the bottom surface of the temperature control frame 17 is welded with a buffer frame 23, the buffer frame 23 comprises a guide frame 231, the outer side of the guide frame 231 is sheathed with a lifting frame 232, the bottom surface of the guide frame 231 is provided with a limit ring 233, a compression spring 234 is arranged between the limit ring 233 and the lifting frame 232, the inner wall of the lifting frame 232 is provided with a baffle 235, the connecting plate 7 extrudes the buffer frame 23 on the top surface of the mounting frame 1, the temperature of the top die 16 is conducted and cooled, the fins 20 conduct the heat of the cooling liquid in the temperature control frame 17, and the exhaust fan 22 is started to accelerate the outward dissipation of the heat.
The working principle is as follows: in practical use, a backboard to be punched is horizontally placed in a backboard placing groove 3, an electric hydraulic rod 8 is started to push a connecting plate 7 to approach to an installation frame 1, a support inserting rod 6 is inserted into a positioning slot 5 to prevent a bearing board 2 from deviating in the punching process, a telescopic driving device connected to the top of the connecting plate 7 pushes the connecting plate 7 together with the support inserting rod 6 downwards to push the support inserting rod 6 to match with an opening on the surface of a bottom film 4 to punch the backboard, in the process, the connecting plate 7 presses a buffer frame 23 on the top surface of the installation frame 1, the buffer frame 23 is pressed and contracted to play a buffer role, after the punching is finished, a temperature control frame 17 is lifted back along with an external telescopic driving device, then the electric hydraulic rod 8 is started to recover to drive the support inserting rod 6 to be separated from the positioning slot 5, then a driving motor 1001 is started to drive the bearing board 2 to rotate 180 degrees, in the process, a punched workpiece and scraps fall from the backboard placing groove 3 to the upper part of a, when a workpiece is taken out, scraps on the surface of the workpiece are shaken off, the scraps fall into the material receiving frame 11 through the material leaking screen plate 14, the screws on the surface of the sealing plate 12 are removed, the sealing plate 12 is removed from a side plate of the material receiving frame 11, and then the scraps are taken out of the material receiving frame 11, so that the loading plate 2 is repeatedly turned, and the process of manually cleaning the scraps is saved; the heat conduction column 19 conducts the heat on the surface of the top die 16 to the silica gel heat conduction plate 18 soaked in the temperature control frame 17, so that the temperature conduction and cooling of the top die 16 are realized, the fins 20 conduct the heat of the cooling liquid in the temperature control frame 17, and the exhaust fan 22 is started to accelerate the outward dissipation speed of the heat.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a computer host computer backplate stamping die with temperature control device, includes mounting bracket (1), its characterized in that: the inner part of the mounting frame (1) is provided with a bearing plate (2), the outer wall of the mounting frame (1) is provided with a driving motor (1001), the surface of the bearing plate (2) is provided with a backboard placing groove (3), the surface of the backboard placing groove (3) is provided with a bottom film (4), the side wall of the bearing plate (2) is provided with a positioning slot (5), the inner part of the positioning slot (5) is inserted with a supporting inserted bar (6), the supporting inserted bar (6) is fixed on the surface of a connecting plate (7), the surface of the connecting plate (7) is connected with the end part of a shaft body of an electric hydraulic rod (8), the electric hydraulic rod (8) is fixed in a fixing frame (9), the fixing frame (9) is fixed on the outer wall of the mounting frame (1), the bottom surface of the mounting frame (1) is provided with a supporting leg (10), and the bottom end of the supporting leg (, the cover is equipped with go-between (13) on the body of rod of landing leg (10), go-between (13) are fixed on the lateral wall of leaking material otter board (14), and the upper portion of mounting bracket (1) is provided with top mould (16), top mould (16) are fixed on the bottom surface of control by temperature change frame (17), are provided with buffer bracket (23) on the bottom surface of control by temperature change frame (17).
2. The computer host backboard stamping die with the temperature control device according to claim 1, wherein: mounting bracket (1) is square frame structure, be provided with on the lateral wall of loading board (2) and support rotary column (201), support rotary column (201) and rotate to be connected in rotating groove (202), rotating groove (202) are seted up on the inner wall of mounting bracket (1), it is provided with two to support rotary column (201), two support rotary column (201) are about the central symmetric distribution of loading board (2), and one of them supports rotary column (201) and the shaft body coupling of driving motor (1001), two have been seted up in backplate standing groove (3), two backplate standing groove (3) are about the high central symmetric distribution of loading board (2).
3. The computer host backboard stamping die with the temperature control device according to claim 1, wherein: the positioning slots (5) are arranged in two groups, the two groups of positioning slots (5) are symmetrically distributed about the height center of the bearing plate (2), the supporting inserted rods (6) are arranged in a plurality of numbers, the supporting inserted rods (6) are distributed along the long edge of the connecting plate (7), and the connecting plate (7) is of a square plate-shaped structure.
4. The computer host backboard stamping die with the temperature control device according to claim 1, wherein: landing leg (10) are including slope section and vertical section, connect work or material rest (11) to be a platform shape frame structure, and the surface that connects work or material rest (11) is pegged graft and is had shrouding (12), and shrouding (12) are "protruding" font platelike structure, and shrouding (12) surface is provided with the fix with screw on the outer wall that connects work or material rest (11).
5. The computer host backboard stamping die with the temperature control device according to claim 1, wherein: the material leakage screen plate (14) is of a square plate-shaped structure, the top surface of the material leakage screen plate (14) is provided with rubber columns (15), the top surface of each rubber column (15) is arc-shaped, the connecting rings (13) are of circular ring-shaped structures, the connecting rings (13) are provided with four, and the four connecting rings (13) are respectively fixed at four corners of the material leakage screen plate (14).
6. The computer host backboard stamping die with the temperature control device according to claim 1, wherein: the heat-conducting plate is characterized in that a silica gel heat-conducting plate (18) is arranged on the top surface of a bottom plate of the temperature control frame (17), a heat-conducting column (19) is inserted into the bottom plate of the temperature control frame (17), fins (20) are inserted into a side plate of the temperature control frame (17), a protection frame (21) is arranged on the side plate of the temperature control frame (17), and an exhaust fan (22) is arranged on the side plate of the protection frame (21).
7. The computer host backboard stamping die with the temperature control device according to claim 1, wherein: buffer frame (23) are equipped with crane (232) including leading truck (231), the outside cover of leading truck (231), and the bottom surface of leading truck (231) is provided with spacing ring (233), is provided with compression spring (234) between spacing ring (233) and crane (232), and is provided with baffle (235) on the inner wall of crane (232).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010096994.7A CN111266458B (en) | 2020-02-17 | 2020-02-17 | Computer host backboard stamping die with temperature control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010096994.7A CN111266458B (en) | 2020-02-17 | 2020-02-17 | Computer host backboard stamping die with temperature control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111266458A true CN111266458A (en) | 2020-06-12 |
| CN111266458B CN111266458B (en) | 2021-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010096994.7A Active CN111266458B (en) | 2020-02-17 | 2020-02-17 | Computer host backboard stamping die with temperature control device |
Country Status (1)
| Country | Link |
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| CN (1) | CN111266458B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111889621A (en) * | 2020-08-10 | 2020-11-06 | 马鞍山市兴隆铸造有限公司 | Wax block making equipment for investment machining casting process |
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| CN105268837A (en) * | 2014-06-25 | 2016-01-27 | 安徽省东至县东鑫冲压件有限责任公司 | Pedestal overturning stamping die |
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| CN206527256U (en) * | 2016-11-29 | 2017-09-29 | 奥克斯空调股份有限公司 | A kind of product and waste material separating device |
| CN209379805U (en) * | 2018-12-18 | 2019-09-13 | 滁州迪蒙德模具制造有限公司 | A kind of turnable workbench for control panel shaping mould |
| CN110586737A (en) * | 2019-10-24 | 2019-12-20 | 六安正辉优产机电科技有限公司 | Continuous blanking method of circulating die applied to punch press |
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2020
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811161A (en) * | 2009-02-20 | 2010-08-25 | 江苏亚威机床股份有限公司 | Positioning device for sub-punches in multiple sub-dies |
| CN203991987U (en) * | 2014-06-25 | 2014-12-10 | 安徽省东至县东鑫冲压件有限责任公司 | A kind of pedestal upset diel |
| CN105268837A (en) * | 2014-06-25 | 2016-01-27 | 安徽省东至县东鑫冲压件有限责任公司 | Pedestal overturning stamping die |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111889621A (en) * | 2020-08-10 | 2020-11-06 | 马鞍山市兴隆铸造有限公司 | Wax block making equipment for investment machining casting process |
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| Publication number | Publication date |
|---|---|
| CN111266458B (en) | 2021-11-19 |
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