CN108608786B - Flanged pin piezo automatic embossing production line - Google Patents
Flanged pin piezo automatic embossing production line Download PDFInfo
- Publication number
- CN108608786B CN108608786B CN201810520526.0A CN201810520526A CN108608786B CN 108608786 B CN108608786 B CN 108608786B CN 201810520526 A CN201810520526 A CN 201810520526A CN 108608786 B CN108608786 B CN 108608786B
- Authority
- CN
- China
- Prior art keywords
- piezo
- embossing
- production line
- flanged pin
- positioning
- 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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Links
- 238000004049 embossing Methods 0.000 title claims abstract description 60
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
- B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
- B44B5/0052—Machines or apparatus for embossing decorations or marks, e.g. embossing coins by pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
- B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
- B44B5/0095—Machines or apparatus for embossing decorations or marks, e.g. embossing coins using computer control means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
- B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
- B44B5/02—Dies; Accessories
- B44B5/022—Devices for holding or supporting work
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The present invention relates to a kind of flanged pin piezo automatic embossing production lines.Mainly solve the problems, such as that existing piezo manual operation is embossed there are position deviation, rejection rate is higher and there are security risks.It is characterized by: the output end of the belt conveyor (1) is equipped with positioning runner (7) wide at the top and narrow at the bottom, the edge of revolving platform (8) is equipped with multiple U-shaped positioning fixtures (9), the side of the revolving platform (8) is equipped with piezo conveying mechanical arm (10), piezo on revolving platform (8) in positioning fixture (9) can be taken out and is transferred under the embossing on workbench (5) in mold (3) by piezo conveying mechanical arm (10), and the side of workbench (5) is equipped with reclaimer robot (11).The present invention can be such that piezo is automatically positioned, and position deviation is small, and uniformly, the piezo pressed that can liquidate automatically is embossed, and work efficiency is high, does not participate in manually, eliminates security risk for embossing.
Description
Technical field
The present invention relates to a kind of processing unit (plant)s of flanged pin piezo, and in particular to a kind of flanged pin piezo automatic embossing
Production line.
Background technique
Piezo is the sound-generating element in buzzer, and piezo is worked using piezoelectric effect principle, applied when to it
It can generate mechanical oscillation when alternating voltage, to beep；Piezo should have good electric conductivity, therefore, buzzing
Piece is usually stamped to form by the metallic resilient material (titanium, Stainless Steel, phosphor bronze and brass etc.) being easily worked.Currently, there is one kind
Circular flanged pin piezo needs to be embossed in piezo after punch forming, and the centre of piezo is pressed with helix embossing
And the embossing that piezo surrounding is radially outward radiated along the center of circle, when embossing, generallys use common punch press and mold is manually grasped
Be embossed, there are following technological deficiencies: 1. due to manually putting piezo in lower mold, can there is position deviation, so that
Helix among piezo is embossed deviation center, causes embossing uneven, influences piezo normal use, rejection rate is higher.
2. manual operation is embossed, large labor intensity, working efficiency is low, once misoperation, also will cause personal injury, it is hidden to there is safety
Suffer from.In order to solve the above-mentioned technical problem, be badly in need of a kind of flanged pin piezo automatic embossing production line, the piezo that presses of liquidating into
Row automatic embossing.
Summary of the invention
In order to solve, existing piezo manual operation is embossed there are position deviation, rejection rate is higher and there are security risks
The problem of, the present invention provides a kind of flanged pin piezo automatic embossing production line, the flanged pin piezo automatic embossing production line
Piezo can be made to be automatically positioned, position deviation is small, and uniformly, the piezo pressed that can liquidate automatically is embossed, work for embossing
Make high-efficient, does not participate in manually, eliminate security risk.
The technical scheme is that the flanged pin piezo automatic embossing production line, including on belt conveyor, embossing
Mold is embossed lower mold, rack and workbench, is embossed lower mold and is fixed on workbench, and rack is fixedly arranged above embossing cylinder,
Embossing upper mold is fixed on the piston rod of embossing cylinder, and it is sliding that the output end of the belt conveyor is equipped with positioning wide at the top and narrow at the bottom
The lower end of slot, positioning runner can just be such that piezo passes through, and the lower end of the positioning runner is equipped with inclined revolving platform, revolution
The edge of platform is equipped with multiple U-shaped positioning fixtures, when one of positioning fixture and the lower end of positioning runner to it is corresponding when
It can slide into the positioning fixture, the side of the revolving platform is equipped with piezo conveying mechanical arm, piezo conveying mechanical arm
Piezo on revolving platform in positioning fixture can be taken out and under the embossing that is transferred on workbench in mold, the one of workbench
Side is equipped with reclaimer robot, and the structure of the reclaimer robot is identical as the structure of piezo conveying mechanical arm, reclaimer robot
Piezo after embossing can be taken out and be transplanted on designated position.
The inner cavity of lower mold is embossed with the gap that can accommodate piezo upper flange on the side wall of mold under the embossing
For up big and down small structure.
The tilt angle of the revolving platform is not more than 30 °.
The tilt angle of the revolving platform is 29 °.
The bottom of the positioning fixture is arc-shaped and the bottom of positioning fixture matches with piezo edge.
The positioning fixture is 8 and is evenly distributed on the edge of revolving platform, and the positioning fixture below positioning runner deflects
It is corresponding with piezo conveying mechanical arm after 90 °.
The piezo conveying mechanical arm includes pedestal, sliding cylinder, slide bar, lifting shaft, goes up and down axle bed and lifting cylinder,
The slide bar is mounted in pedestal, and sliding cylinder is fixed on one end of pedestal, one end of slide bar and the piston rod phase of sliding cylinder
Even, the other end of slide bar has reclinate sucker, and the lower end surface of the sucker and the bottom surface of positioning fixture are parallel, sucker
Lower end surface be equipped with sealing ring, the lower end surface of the sucker passes through the inner passage of slide bar and negative pressure connector and vacuum plant phase
Connection；The lifting shaft is mounted in lifting axle bed and can slide up and down, and lifting cylinder is fixed on the lower section of lifting axle bed, rises
The upper end of drop axis is mutually fixed with pedestal, and the lower end of lifting shaft is connected with the piston rod of lifting cylinder.
The lifting axle bed is equipped with pilot hole, and guide rod is fixed on pedestal, and guide rod is located in pilot hole and can phase
Pilot hole is slided.
The slide bar is equipped with limit sliding chutes, and pedestal is equipped with stop screw, and the lower end of stop screw is located at limit sliding chutes
It is interior.
The invention has the following beneficial effects: due to taking above-mentioned technical proposal, the present invention is controlled by PLC, according to certain
Productive temp realize automation embossing, piezo can be automatically positioned, and position deviation is small, and embossing uniformly, can liquidate automatically
The piezo pressed is embossed, and work efficiency is high, is not participated in manually, and security risk is eliminated.
Detailed description of the invention
Attached drawing 1 is structural schematic diagram of the invention.
Attached drawing 2 is the top view of Fig. 1.
Attached drawing 3 is A-A structure sectional view in Fig. 1.
Attached drawing 4 is the structure sectional view of piezo conveying mechanical arm 10 and reclaimer robot 11 in Fig. 2.
Attached drawing 5 is enlarged drawing at B in Fig. 4.
Attached drawing 6 is the structure sectional view that upper mold 2 is embossed in the present invention.
Attached drawing 7 is the structure sectional view that lower mold 3 is embossed in the present invention.
Attached drawing 8 is the structural schematic diagram for the piezo being processed in the present invention.
1- belt conveyor in figure, 2- embossing upper mold, mold under 3- is embossed, 31- gap, 4- rack, 5- workbench,
6- embossing cylinder, 7- positioning runner, 8- revolving platform, 9- positioning fixture, 10- piezo conveying mechanical arm, 101- pedestal, 102- are sliding
Shifting cylinder, 103- slide bar, 104- lifting shaft, 105- lifting axle bed, 106- negative pressure connector, 107- pilot hole, 108- guide rod,
109- limit sliding chutes, 110- stop screw, 111- sealing ring, 112- sucker, the inner passage 113-, 114- lifting cylinder, 11- take
Expect manipulator.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
As shown in FIG. 1 to FIG. 8, the flanged pin piezo automatic embossing production line, including belt conveyor 1, embossing upper mold
Tool 2 is embossed lower mold 3, rack 4 and workbench 5, is embossed lower mold 3 and is fixed on workbench 5, rack 4 is fixedly arranged above embossing
Cylinder 6, embossing upper mold 2 are fixed on the piston rod of embossing cylinder 6, and the output end of the belt conveyor 1 is equipped under upper width
The lower end of narrow positioning runner 7, positioning runner 7 can just be such that piezo passes through, and the lower end of the positioning runner 7 is equipped with inclination
Revolving platform 8, the edge of revolving platform 8 is equipped with multiple U-shaped positioning fixtures 9, when one of positioning fixture 9 and positioning runner 7
Lower end to it is corresponding when can slide into the positioning fixture 9, the side of the revolving platform 8 is equipped with piezo conveying machinery
Piezo on revolving platform 8 in positioning fixture 9 can be taken out and be transferred to workbench 5 by hand 10, piezo conveying mechanical arm 10
On embossing under in mold 3, the side of workbench 5 is equipped with reclaimer robot 11, the structure and buzzing of the reclaimer robot 11
The structure of piece conveying mechanical arm 10 is identical, and the piezo after embossing can be taken out and be transplanted on specific bit by reclaimer robot 11
It sets.Due to taking above-mentioned technical proposal, belt conveyor 1 is placed in below the press machine of preceding working procedure, and sheet metal is by press machine
Flanged piezo is formed after punch forming, which is not embossed, and directly falls in belt conveyor 1
On, piezo under the action of belt conveyor 1 from positioning runner 7 into the positioning fixture 9 slipped down on revolving platform 8, revolution
The rotation of platform 8 drives piezo to turn an angle by positioning fixture 9 in turn, then is inhaled piezo by piezo conveying mechanical arm 10
It out and is transplanted in the lower mold 3 of embossing on workbench 5, piezo is automatically positioned in mold 3 under embossing, is then embossed upper mold
2 push, and piezo embossing is completed, and embossing upper mold 2 lifts, and are taken the piezo being embossed in lower mold 3 by reclaimer robot 11
Out and it is transplanted on designated position.The present invention is controlled by PLC, realizes automation embossing, piezo energy according to certain productive temp
Enough automatic positionings, position deviation is small, and uniformly, the piezo pressed that can liquidate automatically is embossed, and work efficiency is high, no for embossing
It manually participates in, eliminates security risk.
Lower mold 3 is embossed with the gap 31 that can accommodate piezo upper flange on the side wall of mold 3 under the embossing
Inner cavity is up big and down small structure.When falling on mold 3 under embossing under piezo, piezo upper flange is corresponding with gap 31, buzzing
Piece can be automatically positioned when falling on the bottom surface for being embossed lower mold 3, so that the position deviation fallen behind under each piezo is smaller, positioning
Accurately.
The tilt angle of the revolving platform 8 is not more than 30 °.On the one hand piezo can be made smoothly to slide into positioning runner 7
Interior, on the other hand when revolving platform 8 rotates, piezo will not be skidded off out of positioning runner 7.
The tilt angle of the revolving platform 8 is 29 °.The tilt angle of the preferred revolving platform 8 of the present embodiment is 29 °.
The bottom of the positioning fixture 9 is arc-shaped and the bottom of positioning fixture 9 matches with piezo edge.Piezo
Edge contacted with positioning runner 7 after so that piezo position position, convenient for piezo conveying mechanical arm 10 transfer.
The positioning fixture 9 is 8 and is evenly distributed on the edge of revolving platform 8, the positioning fixture 9 of 7 lower section of positioning runner
It is corresponding with piezo conveying mechanical arm 10 after 90 ° of deflection.The quantity of positioning fixture 9 is set primarily to meeting work pace
Demand, working condition position only there are two, first is that when positioning fixture 9 is corresponding with positioning runner 7 piezo slide into calmly
In position fixture 9, second is that piezo is sucked out and is transplanted on workbench 5 by piezo conveying mechanical arm 10 when revolving platform 8 rotates 90 °
It is embossed in lower mold 3.
The piezo conveying mechanical arm 10 includes pedestal 101, sliding cylinder 102, slide bar 103, lifting shaft 104, lifting
Axle bed 105 and lifting cylinder 114, the slide bar 103 are mounted in pedestal 101, and sliding cylinder 102 is fixed on the one of pedestal 101
The one end at end, slide bar 103 is connected with the piston rod of sliding cylinder 102, and the other end of slide bar 103 has reclinate sucker
112, the lower end surface of the sucker 112 is parallel with the bottom surface of positioning fixture 9, and the lower end surface of sucker 112 is equipped with sealing ring
111, the lower end surface of the sucker 112 is connected by the inner passage 113 and negative pressure connector 106 of slide bar 103 with vacuum plant；
The lifting shaft 104 is mounted in lifting axle bed 105 and can slide up and down, and lifting cylinder 114 is fixed on lifting axle bed 105
Lower section, upper end and 101 phase of pedestal of lifting shaft 104 are fixed, and the lower end of lifting shaft 104 is connected with the piston rod of lifting cylinder 114.
Vacuum plant works when the lower end surface of sucker 112 is pressed in piezo, and under the action of negative pressure, piezo is adsorbed by sucker 112, inhales
When disk 112 is corresponding with lower 3 top of mold is embossed, vacuum plant stops working and releases negative pressure, and piezo is made in gravity itself
Under drop into the lower mold 3 of embossing.
The lifting axle bed 105 is equipped with pilot hole 107, is fixed with guide rod 108 on pedestal 101, guide rod 108 is located at
In pilot hole 107 and the sliding of hole 107 can be oppositely oriented.Guide rod 108 and pilot hole 107 can be avoided the rotation of pedestal 101.
The slide bar 103 is equipped with limit sliding chutes 109, and pedestal 101 is equipped with stop screw 110, under stop screw 110
End is located in limit sliding chutes 109.Limit sliding chutes 109 and stop screw 110 define that the stroke of slide bar 103, control sucker 112 move
Dynamic position, accurate positioning.
Claims (9)
1. a kind of flanged pin piezo automatic embossing production line, including belt conveyor (1), embossing upper mold (2), embossing lower die
Have (3), rack (4) and workbench (5), is embossed lower mold (3) and is fixed on workbench (5), rack (4) is fixedly arranged above embossing
Cylinder (6), embossing upper mold (2) are fixed on the piston rod of embossing cylinder (6), it is characterised in that: the belt conveyor (1)
Output end be equipped with positioning runner (7) wide at the top and narrow at the bottom, the lower end of positioning runner (7) can just be such that piezo passes through, described
The lower end of positioning runner (7) is equipped with inclined revolving platform (8), and the edge of revolving platform (8) is equipped with multiple U-shaped positioning fixtures (9), when
One of positioning fixture (9) and the lower end of positioning runner (7) to it is corresponding when can slide into the positioning fixture (9)
Interior, the side of the revolving platform (8) is equipped with piezo conveying mechanical arm (10), and piezo conveying mechanical arm (10) can will turn round
Piezo on platform (8) in positioning fixture (9) is taken out and is transferred under the embossing on workbench (5) in mold (3), workbench
(5) side is equipped with reclaimer robot (11), structure and piezo conveying mechanical arm (10) of the reclaimer robot (11)
Structure is identical, and the piezo after embossing can be taken out and be transplanted on designated position by reclaimer robot (11).
2. flanged pin piezo automatic embossing production line according to claim 1, it is characterised in that: mold under the embossing
(3) with the gap (31) that can accommodate piezo upper flange on side wall, it is up big and down small for being embossed the inner cavity of lower mold (3)
Structure.
3. flanged pin piezo automatic embossing production line according to claim 1, it is characterised in that: the revolving platform (8)
Tilt angle be not more than 30 °.
4. flanged pin piezo automatic embossing production line according to claim 3, it is characterised in that: the revolving platform (8)
Tilt angle be 29 °.
5. flanged pin piezo automatic embossing production line according to claim 1, it is characterised in that: the positioning fixture
(9) bottom is arc-shaped and the bottom of positioning fixture (9) matches with piezo edge.
6. flanged pin piezo automatic embossing production line according to claim 1, it is characterised in that: the positioning fixture
(9) for 8 and be evenly distributed on the edges of revolving platform (8), the positioning fixture (9) below positioning runner (7) deflect 90 ° after with bee
Ring piece conveying mechanical arm (10) is corresponding.
7. flanged pin piezo automatic embossing production line as claimed in any of claims 1 to 6, it is characterised in that:
The piezo conveying mechanical arm (10) includes pedestal (101), sliding cylinder (102), slide bar (103), lifting shaft (104), rises
Axle bed (105) and lifting cylinder (114) drop, and the slide bar (103) is mounted in pedestal (101), and sliding cylinder (102) is fixed on
One end of one end of pedestal (101), slide bar (103) is connected with the piston rod of sliding cylinder (102), the other end of slide bar (103)
With reclinate sucker (112), the lower end surface of the sucker (112) is parallel with the bottom surface of positioning fixture (9), sucker
(112) lower end surface is equipped with sealing ring (111), and the lower end surface of the sucker (112) passes through the inner passage of slide bar (103)
(113) and negative pressure connector (106) is connected with vacuum plant；The lifting shaft (104) is mounted in lifting axle bed (105) and energy
It enough slides up and down, lifting cylinder (114) is fixed on the lower section of lifting axle bed (105), the upper end of lifting shaft (104) and pedestal
(101) it mutually fixes, the lower end of lifting shaft (104) is connected with the piston rod of lifting cylinder (114).
8. flanged pin piezo automatic embossing production line according to claim 7, it is characterised in that: the lifting axle bed
(105) pilot hole (107) are equipped with, are fixed with guide rod (108) on pedestal (101), guide rod (108) is located at pilot hole
(107) in and hole (107) sliding can be oppositely oriented.
9. flanged pin piezo automatic embossing production line according to claim 7, it is characterised in that: the slide bar (103)
It is equipped with limit sliding chutes (109), pedestal (101) is equipped with stop screw (110), and the lower end of stop screw (110) is located at limit
In sliding slot (109).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810520526.0A CN108608786B (en) | 2018-05-28 | 2018-05-28 | Flanged pin piezo automatic embossing production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810520526.0A CN108608786B (en) | 2018-05-28 | 2018-05-28 | Flanged pin piezo automatic embossing production line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108608786A CN108608786A (en) | 2018-10-02 |
| CN108608786B true CN108608786B (en) | 2019-07-26 |
Family
ID=63664163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810520526.0A Active CN108608786B (en) | 2018-05-28 | 2018-05-28 | Flanged pin piezo automatic embossing production line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108608786B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6193918B1 (en) * | 1999-04-09 | 2001-02-27 | The Procter & Gamble Company | High speed embossing and adhesive printing process and apparatus |
| EP1843899B1 (en) * | 2005-01-21 | 2014-03-19 | manroland sheetfed GmbH | Stamping tool in a printing mechanism with a matrix and punch |
| CN201918221U (en) * | 2010-05-05 | 2011-08-03 | 昆明昆开专用数控设备有限责任公司 | Numerical control multi-station hydraulic bus processing center |
| US20120135191A1 (en) * | 2010-11-30 | 2012-05-31 | Lora Lee Spangler | Systems, Methods and Apparatuses for Direct Embossment of a Polymer Melt Sheet |
| CN103394606B (en) * | 2013-08-05 | 2015-07-15 | 林爱福 | Full-automatic feeding device of punching machine |
| CN108032660B (en) * | 2017-10-31 | 2023-07-04 | 双枪科技股份有限公司 | Vibration feeding device, embossing equipment for chopsticks and production method |
-
2018
- 2018-05-28 CN CN201810520526.0A patent/CN108608786B/en active Active
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| Publication number | Publication date |
|---|---|
| CN108608786A (en) | 2018-10-02 |
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Effective date of registration: 20211124 Address after: 557200 Guizhou province Qiandongnan Miao and Dong Autonomous Prefecture Rongjiang County Industrial Park standard workshop A6 Patentee after: Guizhou Datong Electronic Technology Co.,Ltd. Address before: 325036 Wenzhou City National University Science Park incubator, No. 38 Dongfang South Road, Ouhai District, Wenzhou, Zhejiang Patentee before: WENZHOU VOCATIONAL & TECHNICAL College |
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Denomination of invention: Automatic embossing production line with flange buzzer Effective date of registration: 20230627 Granted publication date: 20190726 Pledgee: Rongjiang County Sub branch of Postal Savings Bank of China Co.,Ltd. Pledgor: Guizhou Datong Electronic Technology Co.,Ltd. Registration number: Y2023980046011 |