CN110814686A - Automatic laminating machine for loudspeaker production - Google Patents
Automatic laminating machine for loudspeaker production Download PDFInfo
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- CN110814686A CN110814686A CN201911121204.XA CN201911121204A CN110814686A CN 110814686 A CN110814686 A CN 110814686A CN 201911121204 A CN201911121204 A CN 201911121204A CN 110814686 A CN110814686 A CN 110814686A
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- 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
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- 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
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- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses an automatic laminating machine for loudspeaker production, which comprises a base, an operating platform, a laminating assembly and a portal frame, wherein the laminating assembly and the portal frame are both arranged on the operating platform, the operating platform is also provided with a feeding belt, loudspeaker assembling seats which are uniformly distributed are arranged above the feeding belt, and the laminating assembly comprises a supporting platform, a reciprocating mechanism, a stress platform, a laminating head, a stress frame and a square tube. This an automatic pressfitting machine for speaker production, slider among the reciprocating mechanism drives the stress column in the brace table, brace table also can be straight reciprocating motion like this, the square cylinder can be compelled its downstream simultaneously with the portal frame contact, the square cylinder downstream drives the stress platform, stress frame and pressfitting head downstream, the pressfitting head just pressfitting treats the speaker of pressfitting, it is effectual to process, work efficiency is high simultaneously, automatic position supplementing subassembly can be automatic and regular with the pay-off area shift to the processing station, degree of automation is high like this, the production convenience has been improved greatly.
Description
Technical Field
The invention relates to a loudspeaker production device, in particular to an automatic laminating machine for loudspeaker production.
Background
The speaker is also called a horn. It is a very common electroacoustic transducer, and can be found in electronic and electric equipment for producing sound. The loudspeaker is a transducer for converting an electric signal into an acoustic signal, and the quality of the loudspeaker has great influence on the sound quality. The loudspeaker is the weakest component in the audio equipment, and is the most important component for the audio effect. Naturally, the larger the speaker size, the better, the larger the size of the woofer, the better the performance in the low frequency part, which can be selected among the options. Enclosures made with high performance speakers mean lower transient distortion and better sound quality. The loudspeaker is formed by assembling T iron, a magnet, a basin frame, a damper, drum paper and a voice coil. And the pressing process is required when all the parts are installed. The existing pressing is mostly manual operation, on one hand, the repeated operation is easy to make mistakes or fatigue, and the rate of finished products is influenced; on the other hand, the labor cost is high, and the working efficiency is not good.
Disclosure of Invention
The invention aims to provide an automatic laminating machine for loudspeaker production, which has the advantages of high automation degree and high production efficiency and solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an automatic laminating machine for loudspeaker production comprises a base, an operating platform, a laminating assembly and a portal frame, wherein the laminating assembly and the portal frame are both arranged on the operating platform, a feeding belt is also arranged on the operating platform, loudspeaker assembling seats which are uniformly distributed are arranged above the feeding belt, the laminating assembly comprises a supporting table, a reciprocating mechanism, a stress table, a laminating head, a stress frame and a square cylinder, the reciprocating mechanism comprises a motor, a grating turntable, a connecting rod, a sliding block, a first short circular shaft, a second short circular shaft, a guide groove and a bearing table, the motor is arranged on the inner side of the operating platform, the grating turntable is arranged at the output end of the motor, the first short circular shaft is arranged at the edge of the side wall of the grating turntable, the grating turntable is movably connected with one end of the connecting rod through the first short circular shaft, the second short circular shaft is arranged at the other end of the connecting rod, the connecting rod is movably connected with the sliding block through, the bottom surface of the sliding block is provided with a guide groove, the sliding block is movably connected with a bearing platform through the guide groove, the side wall of the sliding block is in contact connection with a supporting platform, the supporting platform is also movably connected with an operating platform, the supporting platform comprises a material bearing platform, a first spring, a cylinder, a rotating shaft, a stress column and a cylinder, the side wall of the material bearing platform is provided with the stress column, the stress column is connected with the sliding block, the bottom surface of the material bearing platform is movably connected with the operating platform, the two ends of the top surface of the material bearing platform are welded with vertical cylinders, the inner side of the cylinder is provided with the first spring, the top end of the first spring is in contact with the cylinder, the cylinder is matched with the inner wall of the cylinder, the top end of the cylinder is provided with a bearing, the cylinder is movably connected with two ends of the rotating shaft through the bearing, the outer side of the rotating shaft is provided with a square tube, the end column is in a round cake shape and is movably connected with the side wall of the cylinder, and a pressing head is arranged at the center of the bottom surface of the stress frame.
Preferably, two round holes are formed in the cylinder, a first spring is installed in one round hole, a second spring is installed in the other round hole, and the top end of the second spring contacts with the connecting end post.
Preferably, the lateral wall of slider has seted up the round hole, and the slider is connected the stress column through this round hole, and the slider stretches out operation platform's surface, and motor, grid carousel, connecting rod, first short circular shaft, the short circular shaft of second, guide way and cushion cap all are located operation platform's inner chamber.
Preferably, the bottom surface of the feeding belt is in sliding connection with the upper surface of the material bearing platform, the top surface of the material bearing platform is provided with a buckle plate limiting groove, and the buckle plate limiting groove is in contact with the edge of the feeding belt.
Preferably, the upper surface of the material bearing platform is provided with an automatic position supplementing assembly, the automatic position supplementing assembly is in contact with the bottom surface of the feeding belt, the automatic position supplementing assembly comprises a third spring, a top plate and a short shaft, the short shaft is installed at one end of the top plate, the top plate is connected with the material bearing platform through the short shaft, the third spring is installed in a groove cavity preset by the material bearing platform, the top end of the third spring is in contact with the top plate, the top plate is in contact with the bottom surface of the feeding belt, the bottom surface of the feeding belt is provided with uniformly distributed limiting slotted holes, and the limiting slotted holes are in contact with.
Preferably, the oblique top surface of the square cylinder is in contact connection with the portal frame, and the joint of the square cylinder and the stress platform is subjected to fillet process treatment.
Compared with the prior art, the invention has the beneficial effects that:
this an automatic pressfitting machine for speaker production, slider among the reciprocating mechanism drives the stress column in the brace table, brace table also can be straight reciprocating motion like this, the square cylinder can be compelled its downstream simultaneously with the portal frame contact, the square cylinder downstream drives the stress platform, stress frame and pressfitting head downstream, the pressfitting head just pressfitting treats the speaker of pressfitting, it is effectual to process, work efficiency is high simultaneously, automatic position supplementing subassembly can be automatic and regular with the pay-off area shift to the processing station, degree of automation is high like this, the production convenience has been improved greatly.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a pressing assembly according to the present invention;
FIG. 3 is an enlarged view of the pressing assembly of the present invention;
FIG. 4 is a schematic side view of a pressing assembly according to the present invention;
FIG. 5 is a schematic view of the reciprocating mechanism of the present invention;
FIG. 6 is an enlarged schematic view of the structure A-A of the present invention;
fig. 7 is a schematic view of the cylinder structure of the present invention.
In the figure: 1. a base; 2. an operating platform; 3. pressing the components; 31. a support table; 311. a material bearing platform; 312. a first spring; 313. a cylinder; 314. a rotating shaft; 315. a stress column; 316. a cylinder; 317. A second spring; 318. a buckle plate limiting groove; 32. a reciprocating mechanism; 321. a motor; 322. a grid turntable; 323. a connecting rod; 324. a slider; 325. a first short circular shaft; 326. a second short circular shaft; 327. a guide groove; 328. a bearing platform; 33. a stress platform; 34. a press-fit head; 35. a stress frame; 351. an end post; 36. A square cylinder; 37. an automatic bit supplementing component; 371. a third spring; 372. a topsheet; 373. a minor axis; 4. a feed belt; 41. a speaker mounting base; 42. limiting slotted holes; 5. a portal frame.
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. 1-7, an automatic laminating machine for speaker production comprises a base 1, an operating platform 2, a laminating component 3 and a portal frame 5, wherein the laminating component 3 and the portal frame 5 are both installed on the operating platform 2, a feeding belt 4 is also installed on the operating platform 2, speaker assembling seats 41 are evenly distributed above the feeding belt 4, speakers to be laminated are placed on each speaker assembling seat 41, the laminating component 3 comprises a supporting platform 31, a reciprocating mechanism 32, a force bearing platform 33, a laminating head 34, a force bearing frame 35 and a square tube 36, wherein the reciprocating mechanism 32 is used for driving the supporting platform 31 to do linear reciprocating motion, the reciprocating mechanism 32 comprises a motor 321, a grating turntable 322, a connecting rod 323, a sliding block 324, a first short circular shaft 325, a second short circular shaft 326, a guide groove 327 and a bearing platform 328, the motor 321 is installed on the inner side of the operating platform 2, the output end of the motor 321 is installed with the grating turntable 322, the motor 321 drives the grating turntable 322 to rotate, a first short round shaft 325 is installed at the edge of the side wall of the grating turntable 322, the grating turntable 322 is movably connected with one end of a connecting rod 323 through the first short round shaft 325, the grating turntable 322 rotates to drive the connecting rod 323 to move, a second short round shaft 326 is installed at the other end of the connecting rod 323, the connecting rod 323 is movably connected with the slider 324 through the second short round shaft 326, so that the slider 324 can also move, a round hole is formed in the side wall of the slider 324, the slider 324 is connected with the stress column 315 through the round hole, the stress column 315 is driven when the slider 324 moves, the slider 324 extends out of the surface of the operating platform 2, the motor 321, the grating turntable 322, the connecting rod 323, the first short round shaft 325, the second short round shaft 326, the guide groove 327 and the bearing platform 328 are all located in the inner cavity of the operating platform 2, the bottom surface of the slider 324 is provided with the, the two ends of the bearing platform 328 are fixed with the operating platform 2, namely the sliding block 324 is limited, the sliding block 324 can only move left and right in the horizontal plane direction, the side wall of the sliding block 324 is in contact connection with the supporting platform 31, the supporting platform 31 is also in movable connection with the operating platform 2, the supporting platform 31 comprises a material bearing platform 311, a first spring 312, a cylinder 313, a rotating shaft 314, a stress column 315 and a cylinder 316, the stress column 315 is installed at the side wall of the material bearing platform 311, the stress column 315 is connected with the sliding block 324, the bottom surface of the material bearing platform 311 is movably connected with the operating platform 2, the two vertical cylinders 313 are welded at the two ends of the top surface of the material bearing platform 311, two round holes are formed in the cylinder 313, the first spring 312 is installed in one round hole, the second spring 317 is installed in the other round hole, the top end of the second spring 317 is in contact connection with the end column 351, the first spring 312, the top end of the first spring 312 contacts the cylinder 316, the cylinder 316 is matched with the inner wall of the cylinder 313, the top end of the cylinder 316 is provided with a bearing, the cylinder 316 is movably connected with two ends of the rotating shaft 314 through the bearing, the outer side of the rotating shaft 314 is provided with the square tube 36, the oblique top surface of the square tube 36 is in contact connection with the portal frame 5, when the square tube 36 moves left and right, the square tube 36 is forced to contact with the portal frame 5, the joint of the square tube 36 and the stress platform 33 is processed by a rounding process, so that the square tube 36 runs more stably, the bottom end of the square tube 36 is in contact connection with the stress platform 33, the stress platform 33 is erected at the center of the top end of the stress frame 35, two ends of the stress frame 35 are welded and fixed with the end column 351, the end column is in a round cake shape, the end column 351 is movably connected with the side wall of the cylinder 313, the center of the bottom surface of the stress frame 35 is provided with the press head 34, namely, when, the square tube 36 moves downwards to drive the force bearing table 33, the force bearing frame 35 and the pressing head 34 to move downwards, the pressing head 34 just presses the loudspeaker to be pressed, and the first spring 312 and the second spring 317 are both used for elastic reset.
The bottom surface of the feeding belt 4 is connected with the upper surface of the material bearing platform 311 in a sliding manner, the top surface of the material bearing platform 311 is provided with a buckle plate limiting groove 318, the buckle plate limiting groove 318 is in contact with the edge of the feeding belt 4, the buckle plate limiting groove 318 ensures the stability of the feeding belt 4, the upper surface of the material bearing platform 311 is provided with an automatic position supplementing assembly 37, the automatic position supplementing assembly 37 can automatically and regularly transfer the feeding belt 4 to a processing station, the automatic position supplementing assembly 37 is in contact with the bottom surface of the feeding belt 4, the automatic position supplementing assembly 37 comprises a third spring 371, a top plate 372 and a short shaft 373, the short shaft 373 is arranged at one end of the top plate 372, the top plate 372 is connected with the material bearing platform 311 through the short shaft 373, the third spring 371 is arranged in a groove cavity preset in the material bearing platform 311, the top end of the third spring 371 is in contact with the top plate 372, the top plate 372 is in contact with, the retaining slot 42 is in contact with the top piece 372, and the top piece 372 is used for clamping.
The automatic laminating machine for producing the loudspeaker comprises a base 1, an operating platform 2, a laminating component 3 and a portal frame 5, wherein the laminating component 3 and the portal frame 5 are both arranged on the operating platform 2, a feeding belt 4 is also arranged on the operating platform 2, evenly distributed loudspeaker assembling seats 41 are arranged above the feeding belt 4, the loudspeaker to be laminated is arranged on each loudspeaker assembling seat 41, the laminating component 3 comprises a supporting platform 31, a reciprocating mechanism 32, a stress platform 33, a laminating head 34, a stress frame 35 and a square barrel 36, wherein the reciprocating mechanism 32 is used for driving the supporting platform 31 to do linear reciprocating motion, a sliding block 324 in the reciprocating mechanism 32 drives a stress column 315 in the supporting platform 31, the supporting platform 31 also does linear reciprocating motion, the supporting platform 31 is movably connected with the operating platform 2, two round holes are formed in the barrel 313, a first spring 312 is arranged in one round hole, a second spring 317 is arranged in the other round hole, the top end of the second spring 317 is in contact with the connecting end post 351, the first spring 312 and the second spring 317 are both used for elastic reset, when the square tube 36 in the supporting table 31 moves left and right, the square tube 36 is forced to be in contact with the portal frame 5 and moves downwards, the square tube 36 moves downwards to drive the stress table 33, the stress frame 35 and the pressing head 34 to move downwards, the pressing head 34 just presses the loudspeaker to be pressed, and the first spring 312 and the second spring 317 are both used for elastic reset; the bottom surface of pay-off area 4 and the upper surface sliding connection who holds material platform 311, the buckle spacing groove 318 has been seted up to the top surface of holding material platform 311, buckle spacing groove 318 guarantees the stability of pay-off area 4, the last surface mounting who holds material platform 311 has automatic position subassembly 37 of mending, automatic position subassembly 37 of mending can be automatic and regular with the pay-off area 4 transfer to the processing station, automatic position subassembly 37 of mending contacts with the bottom surface of pay-off area 4, automatic position subassembly 37 of mending includes third spring 371, top piece 372 and minor axis 373, top piece 372 passes through minor axis 373 and connects and holds material platform 311, third spring 371 is used for the restoration of top piece 372.
To sum up, this an automatic pressfitting machine for speaker production, slider 324 among the reciprocating mechanism 32 drives the stress column 315 in the brace table 31, brace table 31 also can be straight reciprocating motion like this, square tube 36 can be forced to contact its downstream simultaneously with portal frame 5, square tube 36 downstream drives stress platform 33, stress frame 35 and pressfitting head 34 downstream, pressfitting head 34 just the pressfitting treats the speaker of pressfitting, the processing is effectual, simultaneously work efficiency is high, automatic position supplementing subassembly 37 can be automatic and regular transfer the processing station with pay-off belt 4, degree of automation is high like this, production convenience has been improved greatly.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (6)
1. The utility model provides an automatic pressfitting machine for speaker production, includes base (1), operation platform (2), pressing components (3) and portal frame (5), its characterized in that: the pressing component (3) and the portal frame (5) are both installed on the operating platform (2), the operating platform (2) is further provided with a feeding belt (4), speaker assembling seats (41) which are uniformly distributed are installed above the feeding belt (4), the pressing component (3) comprises a supporting table (31), a reciprocating mechanism (32), a stress table (33), a pressing head (34), a stress frame (35) and a square tube (36), the reciprocating mechanism (32) comprises a motor (321), a grid turntable (322), a connecting rod (323), a sliding block (324), a first short circular shaft (325), a second short circular shaft (326), a guide groove (327) and a bearing table (328), the motor (321) is installed on the inner side of the operating platform (2), the grid turntable (322) is installed at the output end of the motor (321), and the edge (325) of the first short circular shaft is installed at the side wall of the grid turntable (322), the grating turntable (322) is movably connected with one end of a connecting rod (323) through a first short circular shaft (325), a second short circular shaft (326) is installed at the other end of the connecting rod (323), the connecting rod (323) is movably connected with a sliding block (324) through the second short circular shaft (326), a guide groove (327) is formed in the bottom surface of the sliding block (324), the sliding block (324) is movably connected with a bearing platform (328) through the guide groove (327), the side wall of the sliding block (324) is in contact connection with a supporting platform (31), the supporting platform (31) is also movably connected with an operating platform (2), the supporting platform (31) comprises a material bearing platform (311), a first spring (312), a cylinder (313), a rotating shaft (314), a stress column (315) and a cylinder (316), the stress column (315) is installed at the side wall of the material bearing platform (311), the stress column (315) is connected with the sliding block (324), and the bottom surface of the material bearing platform (311) is, the welding of the top surface both ends department of holding material platform (311) has vertical drum (313), first spring (312) are installed to the inboard of drum (313), the top contact cylinder (316) of first spring (312), cylinder (316) cooperate with the inner wall of drum (313), the bearing is installed on the top of cylinder (316), cylinder (316) are through the both ends of this bearing swing joint pivot (314), square tube (36) are installed to the outside of pivot (314), the bottom contact of square tube (36) is connected with atress platform (33), atress platform (33) erect the top center department in atress frame (35), the both ends of atress frame (35) all welded fastening has end post (351), end post (351) are the cake form, the lateral wall of end post (351) swing joint drum (313), the bottom surface center department of atress frame (35) installs and has stitching head (34).
2. An automatic press for speaker production according to claim 1, wherein: two round holes are formed in the cylinder (313), a first spring (312) is installed in one round hole, a second spring (317) is installed in the other round hole, and the top end of the second spring (317) is in contact with the connecting end post (351).
3. An automatic press for speaker production according to claim 1, wherein: the side wall of the sliding block (324) is provided with a round hole, the sliding block (324) is connected with the stress column (315) through the round hole, the sliding block (324) extends out of the surface of the operating platform (2), and the motor (321), the grating rotating disc (322), the connecting rod (323), the first short circular shaft (325), the second short circular shaft (326), the guide groove (327) and the bearing platform (328) are all located in the inner cavity of the operating platform (2).
4. An automatic press for speaker production according to claim 1, wherein: the bottom surface of the feeding belt (4) is in sliding connection with the upper surface of the material bearing platform (311), the top surface of the material bearing platform (311) is provided with a buckle plate limiting groove (318), and the buckle plate limiting groove (318) is in contact with the edge of the feeding belt (4).
5. An automatic press for speaker production according to claim 1, wherein: the upper surface mounting who holds material platform (311) has automatic position subassembly (37) of mending, the bottom surface contact of position subassembly (37) and pay-off area (4) is mended automatically, automatic position subassembly (37) of mending includes third spring (371), top piece (372) and minor axis (373), the one end at top piece (372) is installed in minor axis (373), top piece (372) are connected through minor axis (373) and are held material platform (311), hold and install third spring (371) in the predetermined recess intracavity of material platform (311), the top and the top piece (372) contact of third spring (371), the bottom surface of pay-off area (4) is connected in top piece (372) contact, spacing slotted hole (42) that have evenly distributed have been seted up to the bottom surface of pay-off area (4), spacing slotted hole (42) and top piece (372) contact.
6. An automatic press for speaker production according to claim 1, wherein: the oblique top surface of the square cylinder (36) is in contact connection with the portal frame (5), and the joint of the square cylinder (36) and the stress platform (33) is subjected to fillet process treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911121204.XA CN110814686B (en) | 2019-11-15 | 2019-11-15 | Automatic laminating machine for loudspeaker production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911121204.XA CN110814686B (en) | 2019-11-15 | 2019-11-15 | Automatic laminating machine for loudspeaker production |
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| Publication Number | Publication Date |
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| CN110814686A true CN110814686A (en) | 2020-02-21 |
| CN110814686B CN110814686B (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911121204.XA Active CN110814686B (en) | 2019-11-15 | 2019-11-15 | Automatic laminating machine for loudspeaker production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112261568A (en) * | 2020-10-10 | 2021-01-22 | 安徽井利电子有限公司 | Multi-station film pressing device for loudspeaker processing and implementation method thereof |
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| JPS61159337A (en) * | 1984-12-28 | 1986-07-19 | Iwatani & Co | Semiautomatic assembling device |
| JPS63134140A (en) * | 1986-11-21 | 1988-06-06 | Iwatani & Co | Preparatory work change method in assembly line facilities for speaker field part |
| FR2650209A1 (en) * | 1989-07-25 | 1991-02-01 | Steelweld France | Crimping-press cell |
| JP2004047330A (en) * | 2002-07-12 | 2004-02-12 | Shin Etsu Polymer Co Ltd | Crimp holding type connector and its connection structure |
| JP2006352573A (en) * | 2005-06-16 | 2006-12-28 | Mitsubishi Electric Engineering Co Ltd | Electromagnetic transducer |
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| CN206689686U (en) * | 2017-04-19 | 2017-12-01 | 常州安澜电气有限公司 | A kind of loudspeaker manufacture assembling die |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112261568A (en) * | 2020-10-10 | 2021-01-22 | 安徽井利电子有限公司 | Multi-station film pressing device for loudspeaker processing and implementation method thereof |
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| Publication number | Publication date |
|---|---|
| CN110814686B (en) | 2021-03-30 |
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