CN112846552A - Laser cutting and welding integrated knife and scissors manufacturing equipment - Google Patents
Laser cutting and welding integrated knife and scissors manufacturing equipment Download PDFInfo
- Publication number
- CN112846552A CN112846552A CN202110038053.2A CN202110038053A CN112846552A CN 112846552 A CN112846552 A CN 112846552A CN 202110038053 A CN202110038053 A CN 202110038053A CN 112846552 A CN112846552 A CN 112846552A
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- plate
- laser cutting
- conveying mechanism
- welding
- clamping
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- 238000003698 laser cutting Methods 0.000 title claims abstract description 55
- 238000003466 welding Methods 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 102
- 239000000463 material Substances 0.000 claims abstract description 48
- 238000003825 pressing Methods 0.000 claims abstract description 47
- 238000000926 separation method Methods 0.000 claims description 12
- 210000001503 joint Anatomy 0.000 claims description 11
- 230000001360 synchronised effect Effects 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000006872 improvement Effects 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
Abstract
The invention discloses a cutter and scissors manufacturing device integrating laser cutting and welding; the automatic welding machine comprises a frame, wherein a first plate conveying mechanism, a second plate conveying mechanism, a material pressing parallel and level mechanism and an XY moving control module are arranged on the frame, the material pressing parallel and level mechanism is located between the first plate conveying mechanism and the second plate conveying mechanism, a laser cutting machine head and a welding machine head are arranged on the XY moving control module, the laser cutting machine head and the welding machine head are located right above the material pressing parallel and level mechanism, and a cylinder clamp plate horizontal feeding mechanism is arranged on the first plate conveying mechanism and the second plate conveying mechanism. The invention adopts the mode of original plate feeding, the two plates are in butt contact for alignment welding, and then the laser cutting is carried out according to the shape specified by a program, and the mode of original plate feeding can solve the problems of difficult manual positioning, multiple clamping and other complicated steps in the prior art.
Description
Technical Field
The invention relates to a knife and scissors manufacturing device, in particular to a knife and scissors manufacturing device integrating laser cutting and welding.
Background
At present, the existing method for manufacturing the knife scissors generally comprises the following steps: (1) two different metal plates are cut separately (such as a blade part and a blade part which are cut separately and formed); (2) the two parts are manually clamped and fixed after being cut and formed, so that the two parts are in butt contact with each other, (3) a jig with the blade part and the blade part is manually pushed to a laser welding position for welding, and (4) the jig needs to be manually taken out and reloaded after the welding is finished. The traditional manufacturing process has the following disadvantages: 1. the cutting edge part for cutting separately is small and difficult to fix, 2, manual fixing and alignment are not guaranteed, 3, a finished product which is just welded has a heat conduction effect, the temperature is high, and manual material taking is easy to scald; 4. the product quality is difficult to guarantee.
Disclosure of Invention
The invention aims to provide a cutter and scissors manufacturing device integrating laser cutting and welding aiming at the defects in the prior art.
In order to solve the above defects in the prior art, the technical scheme provided by the invention is as follows: the utility model provides a preparation equipment is cut to integrative sword of laser cutting, welding, includes the frame, be equipped with first panel conveying mechanism, second panel conveying mechanism, press material parallel and level mechanism and XY removal control module group in the frame, press material parallel and level mechanism to be located between first panel conveying mechanism and the second panel conveying mechanism, XY removes to be equipped with laser cutting aircraft nose and welding head on the control module group, laser cutting aircraft nose and welding head are located press material parallel and level mechanism directly over, first panel conveying mechanism with all be equipped with cylinder splint horizontal feeding mechanism on the second panel conveying mechanism. The XY movement control module comprises an X movement control module and a Y movement control module, the X movement control module controls the Y movement control module to move through a motor and a lead screw, and the Y movement control module controls the laser cutting machine head and the welding machine head to move through the motor and the lead screw.
As an improvement of the integrated laser cutting and welding knife and shear manufacturing equipment, a separator is arranged below the pressing leveling mechanism of the rack, finished products and leftover materials cut by the laser cutting machine head are conveyed out of the separator, and the separator controls different conveying channels to separately convey the products and the leftover materials.
The rigidity of the plate conveyed by the first plate conveying mechanism is different from the rigidity of the plate conveyed by the second plate conveying mechanism, the plate conveyed by the first plate conveying mechanism and the plate conveyed by the second plate conveying mechanism are in collision contact at the position of the material pressing leveling mechanism, the two plates are pressed down by the material pressing leveling mechanism, the butt joint surfaces of the two plates are in a leveling state, and the plates are pressed tightly.
The laser cutting and welding integrated knife and shear manufacturing equipment is an improvement of laser cutting and welding integrated knife and shear manufacturing equipment, when butt joint surfaces of two plates are in a parallel state, the XY movement control module controls the welding machine head to move to weld butt joint positions of the two plates, after welding of the welding machine head is completed, the laser cutting machine head cuts the two plates according to a preset knife and shear shape, and cut and formed knife and shears automatically fall off on a separator and are sent out.
The invention relates to an improvement of a laser cutting and welding integrated knife and shear manufacturing device, wherein a material pressing leveling mechanism comprises a pressing frame and a lower alignment plate, material pressing air cylinders are respectively arranged at two ends of the pressing frame and drive the pressing frame to press downwards, the middle of the pressing frame is hollowed, the position where two plates touch and contact each other is hollowed out in the middle of the pressing frame, and finished products and leftover materials cut by a laser cutting machine head fall from the hollowed-out position in the middle of the pressing frame.
The cylinder clamping and feeding mechanism comprises a servo motor and a lead screw controlled by the servo motor, a clamping cylinder support is connected to the lead screw, two clamping cylinders are arranged on the clamping cylinder support at intervals, clamping blocks are arranged on piston rods of the two clamping cylinders, the two clamping cylinders control the clamping blocks to move towards corresponding directions and can clamp a plate, and after the two clamping cylinders clamp the plate, the servo motor drives the lead screw to push the clamping cylinder support to move so as to drive the plate to move;
after one product is cut off by the laser cutting machine head each time, the air cylinder clamping and feeding mechanism can clamp the plate to move to a distance of colliding and contacting with the other plate.
As an improvement of the integrated laser cutting and welding knife and shear manufacturing equipment, the separator comprises a rotary cylinder and an A-shaped separation channel, the A-shaped separation channel is provided with two material distribution channels, and the rotary cylinder is positioned between the two material distribution channels; the inside of passageway is selected separately to the A font is equipped with the rotary rod, revolving cylinder's output shaft is in the one end of rotary rod, rotary rod connects in the recess of passageway is selected separately to the A font.
As an improvement of the laser cutting and welding integrated knife and shear manufacturing equipment, the first plate conveying mechanism and the second plate conveying mechanism respectively comprise a plurality of conveying rollers, one end of each conveying roller is connected with a synchronous belt through a synchronous wheel, and one end of one conveying roller is connected with a driving motor through the synchronous belt.
As an improvement of the integrated laser cutting and welding knife and shear manufacturing equipment, the rack is positioned below the separator, and a product feeding conveying line and a waste feeding conveying line are arranged below the separator;
when the laser cutting machine head cuts a product, the rotary air cylinder controls the A-shaped sorting channel to rotate by an angle, one of the sorting channels completely blocks the hollow position in the middle of the pressing frame, and the cut product is directly conveyed to the product feeding conveying line through the sorting channel and is discharged;
when the laser cutting machine head cuts leftover materials of a plate, the rotary air cylinder controls the A-shaped separation channel to rotate by another angle, so that the other separation channel completely blocks the middle hollow position of the pressing frame, and the waste materials are directly conveyed to the waste material feeding conveying line through the separation channel after being cut out.
As an improvement of the laser cutting and welding integrated knife and shear manufacturing equipment, a plate sensor is arranged below the pressing leveling mechanism of the rack, and when the plate sensor senses that a plate is arranged, the first plate conveying mechanism and the second plate conveying mechanism stop feeding;
when the plate sensor does not sense a plate, the first plate conveying mechanism and the second plate conveying mechanism convey the plate to the position of the cylinder clamping and feeding mechanism, and the cylinder clamping and feeding mechanism clamps the plate to horizontally feed the plate.
Compared with the prior art, the invention has the advantages that: the invention adopts the mode of original plate feeding, the two plates are in butt contact for alignment welding, and then the laser cutting is carried out according to the shape specified by a program, and the mode of original plate feeding can solve the problems of difficult manual positioning, multiple clamping and other complicated steps in the prior art. And moreover, the leftover materials can be cut by laser, and the butt joint surfaces and the butt joint amplitude of the two plates can be cut again. The automatic feeding device disclosed by the invention adopts automatic operation from feeding to finished product discharging, the production efficiency is high, the labor cost is low, and the product quality is guaranteed.
Drawings
The invention and its advantageous technical effects are described in further detail below with reference to the accompanying drawings and detailed description, in which:
fig. 1 is a schematic perspective view of a knife-shear welding and cutting device according to the present invention.
Fig. 2 is a schematic structural view of the swaging and leveling mechanism of the present invention.
FIG. 3 is a schematic structural view of a cylinder clamping and feeding mechanism of the present invention.
FIG. 4 is a schematic view of an A-shaped sorting channel configuration of the present invention.
FIG. 5 is a schematic view of the mounting structure of the laser head and welding head of the knife-shear welding and cutting device of the present invention with the outer cover removed.
Fig. 6 is a schematic structural view of two plate feeding mechanisms of the present invention.
Detailed Description
The invention will be further described below with reference to the drawings and specific examples, but the embodiments of the invention are not limited thereto.
As shown in fig. 1-6, a laser cutting and welding integrated knife and shear manufacturing device comprises a frame 10, wherein a first plate conveying mechanism 3A, a second plate conveying mechanism 3B, a material pressing and leveling mechanism 4 and an XY moving control module 7 are arranged on the frame 10, the material pressing and leveling mechanism 4 is arranged between the first plate conveying mechanism 3A and the second plate conveying mechanism 3B, a laser cutting machine head 1 and a welding machine head 2 are arranged on the XY moving control module 7, the laser cutting machine head 1 and the welding machine head 2 are arranged right above the material pressing and leveling mechanism 4, and a cylinder clamping plate horizontal feeding mechanism 6 is arranged on each of the first plate conveying mechanism 3A and the second plate conveying mechanism 3B. The XY movement control module 7 comprises an X movement control module 71 and a Y movement control module 72, the X movement control module 71 controls the Y movement control module 72 to move through a motor and a screw rod, and the Y movement control module 72 controls the laser cutting machine head and the welding machine head to move through the motor and the screw rod.
Preferably, the rack 10 is arranged below the material pressing and leveling mechanism 4, the sorter 8 is arranged below the material pressing and leveling mechanism, finished products and leftover materials cut by the laser cutting head 1 are conveyed out of the sorter 8, and the sorter 8 controls different conveying channels to separately convey the products and the leftover materials out.
Preferably, the hardness of the plate conveyed by the first plate conveying mechanism 3A is different from that of the plate conveyed by the second plate conveying mechanism 3B, and the plate conveyed by the first plate conveying mechanism 3A and the plate conveyed by the second plate conveying mechanism 3B are in butt contact at the position of the material pressing and leveling mechanism 4 and are pressed down by the material pressing and leveling mechanism 4, so that the butt joint surfaces of the two plates 5 are in a level state and are pressed down by the plates 5.
Preferably, when the butt joint face of two blocks of panels 5 is in the state of parallel and level, XY removes control module 7 and controls welding head 2 and remove and weld the butt joint department of two blocks of panels 5, cut two blocks of panels 5 by laser cutting head 1 according to the shape of cutting scissors that predetermines after welding head 2 welds the completion, and the fashioned sword of cutting is cut and is dropped automatically and send out on sorter 8.
Preferably, press material parallel and level mechanism 4 to be equipped with respectively including pressing frame 41 and lower counterpoint board 42, the both ends of pressing frame 41 and press material cylinder 43, press material cylinder 43 to drive and press frame 41 to push down, the middle part of pressing frame 41 is the fretwork form, and the position of two blocks of panel 5 clashing into the contact is in the middle part fretwork department of pressing frame 41, and the finished product and the leftover bits that laser cutting aircraft nose 1 cut out all drop from the middle part fretwork department of pressing frame 41.
Preferably, the cylinder clamping and feeding mechanism 6 comprises a servo motor 64 and a screw rod 65 controlled by the servo motor, the screw rod 65 is connected with a clamping cylinder support 61, two clamping cylinders 62 are arranged on the clamping cylinder support 61 at intervals, clamping blocks 63 are arranged on piston rods of the two clamping cylinders 62, the two clamping cylinders 62 control the clamping blocks 63 to move towards corresponding directions and approach, so that the plate 5 can be clamped, and after the plate 5 is clamped by the two clamping cylinders 62, the servo motor 64 drives the screw rod 65 to push the clamping cylinder support 61 to move, so that the plate 5 is driven to move;
after one product is cut off from the plate 5 by the laser cutting head 1 each time, the cylinder clamping and feeding mechanism 6 clamps the plate 5 to move to a distance of colliding and contacting with another plate 5.
Preferably, the separator 8 comprises a rotary cylinder 81 and an a-shaped separation channel 82, the a-shaped separation channel 82 has two material distribution channels, and the rotary cylinder 81 is located between the two material distribution channels; a rotating rod 85 is arranged in the A-shaped sorting channel 82, an output shaft of the rotating cylinder 81 is connected to one end of the rotating rod 85, and the rotating rod 85 is connected into a groove of the A-shaped sorting channel 82.
Preferably, the first plate conveying mechanism 3A and the second plate conveying mechanism 3B each include a plurality of conveying rollers 31, one end of each of the two conveying rollers 31 is connected to a synchronous belt 33 through a synchronous wheel 32, and one end of one of the conveying rollers 31 is connected to a driving motor 34 through the synchronous belt.
Preferably, the frame 10 is provided with a product feeding line 83 and a waste feeding line 84 below the sorter 8; the product feeding line 83 and the scrap feeding line 84 each include an endless feeding belt and a feeding motor for controlling the endless feeding belt to rotate.
When the laser cutting machine head 1 cuts a product, the rotating cylinder 81 controls the A-shaped sorting channel 82 to rotate by an angle, so that one of the sorting channels completely blocks the hollow-out position in the middle of the pressing frame 41, and the cut product is directly conveyed to the product feeding conveying line 83 through the sorting channel and is discharged;
when the laser cutting machine head 1 cuts leftover materials of a plate, the rotating air cylinder 81 controls the A-shaped sorting channel 82 to rotate by another angle, so that the other sorting channel completely blocks the middle hollow position of the pressing frame 41, and the cut waste materials are directly conveyed to the waste material feeding conveying line 84 through the sorting channel and sent out.
Preferably, the rack 10 is provided with a plate sensor below the material pressing leveling mechanism 4, and when the plate sensor senses that a plate 5 is present, the first plate conveying mechanism 3A and the second plate conveying mechanism 3B stop feeding;
when the plate sensor does not sense the plate 5, the first plate conveying mechanism 3A and the second plate conveying mechanism 3B convey the plate to the position of the cylinder clamping and feeding mechanism 6, and the cylinder clamping and feeding mechanism 6 clamps the plate 5 to horizontally feed the plate.
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 arrangements of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a preparation equipment is cut to integrative sword of laser cutting, welding, includes the frame, its characterized in that, be equipped with first panel conveying mechanism, second panel conveying mechanism, press material parallel and level mechanism and XY removal control module group in the frame, press material parallel and level mechanism to be located between first panel conveying mechanism and the second panel conveying mechanism, XY removes and is equipped with laser cutting aircraft nose and welding head on the control module group, laser cutting aircraft nose and welding head are located press material parallel and level mechanism directly over, first panel conveying mechanism with all be equipped with cylinder splint horizontal feeding mechanism on the second panel conveying mechanism.
2. The laser cutting and welding integrated knife and shear manufacturing equipment as claimed in claim 1, wherein the rack is located below the material pressing and leveling mechanism, a sorter is arranged below the material pressing and leveling mechanism, finished products and leftover materials cut by the laser cutting machine head are conveyed out of the sorter, and the sorter controls different conveying channels to separately convey the products and the leftover materials out.
3. The laser cutting and welding integrated knife and shear manufacturing equipment as claimed in claim 2, wherein the hardness of the plate conveyed by the first plate conveying mechanism is different from the hardness of the plate conveyed by the second plate conveying mechanism, and the plate conveyed by the first plate conveying mechanism and the plate conveyed by the second plate conveying mechanism are in butt contact at the position of the material pressing and leveling mechanism and are pressed down by the material pressing and leveling mechanism, so that the butt joint surfaces of the two plates are in a level state and are pressed down.
4. The laser cutting and welding integrated knife and shear manufacturing equipment as claimed in claim 3, wherein when the butt joint surfaces of two plates are in a flush state, the XY movement control module controls the welding head to move to weld the butt joint of the two plates, after the welding of the welding head is completed, the laser cutting head cuts the two plates according to a preset knife and shear shape, and the cut knife and shear automatically falls off the sorter to be sent out.
5. The laser cutting and welding integrated knife and shear manufacturing equipment as claimed in claim 4, wherein the pressing leveling mechanism comprises a pressing frame and a lower aligning plate, pressing cylinders are respectively arranged at two ends of the pressing frame and drive the pressing frame to press downwards, the middle of the pressing frame is hollowed out, two plates touch each other and contact each other, the hollowed-out part in the middle of the pressing frame is located, and finished products and leftover materials cut by the laser cutting machine head fall from the hollowed-out part in the middle of the pressing frame.
6. The laser cutting and welding integrated knife and shear manufacturing equipment as claimed in claim 4, wherein the cylinder clamping and feeding mechanism comprises a servo motor and a lead screw controlled by the servo motor, a clamping cylinder support is connected to the lead screw, two clamping cylinders are arranged on the clamping cylinder support at intervals, clamping blocks are arranged on piston rods of the two clamping cylinders, the two clamping cylinders can clamp a plate when the clamping blocks move close to each other in corresponding directions, and the servo motor drives the lead screw to push the clamping cylinder support to move after the two clamping cylinders clamp the plate, so that the plate is driven to move;
after one product is cut off by the laser cutting machine head each time, the air cylinder clamping and feeding mechanism can clamp the plate to move to a distance of colliding and contacting with the other plate.
7. The laser cutting and welding integrated knife and shear manufacturing equipment according to claim 2, wherein the separator comprises a rotary cylinder and an A-shaped separation channel, the A-shaped separation channel is provided with two material distribution channels, and the rotary cylinder is positioned between the two material distribution channels; the inside of passageway is selected separately to the A font is equipped with the rotary rod, revolving cylinder's output shaft is in the one end of rotary rod, rotary rod connects in the recess of passageway is selected separately to the A font.
8. The laser cutting and welding integrated knife and shear manufacturing device as claimed in claim 1, wherein the first plate conveying mechanism and the second plate conveying mechanism each comprise a plurality of conveying rollers, one end of each of the two conveying rollers is connected with a synchronous belt through a synchronous wheel, and one end of one of the conveying rollers is connected with a driving motor through the synchronous belt.
9. The laser cutting and welding integrated knife and shear manufacturing equipment as claimed in claim 2, wherein a product feeding conveying line and a waste feeding conveying line are arranged below the separator of the rack;
when the laser cutting machine head cuts a product, the rotary air cylinder controls the A-shaped sorting channel to rotate by an angle, one of the sorting channels completely blocks the hollow position in the middle of the pressing frame, and the cut product is directly conveyed to the product feeding conveying line through the sorting channel and is discharged;
when the laser cutting machine head cuts leftover materials of a plate, the rotary air cylinder controls the A-shaped separation channel to rotate by another angle, so that the other separation channel completely blocks the middle hollow position of the pressing frame, and the waste materials are directly conveyed to the waste material feeding conveying line through the separation channel after being cut out.
10. The laser cutting and welding integrated knife and shear manufacturing equipment as claimed in claim 4, wherein a plate sensor is arranged below the material pressing leveling mechanism of the rack, and when the plate sensor senses that a plate exists, the first plate conveying mechanism and the second plate conveying mechanism stop feeding;
when the plate sensor does not sense a plate, the first plate conveying mechanism and the second plate conveying mechanism convey the plate to the position of the cylinder clamping and feeding mechanism, and the cylinder clamping and feeding mechanism clamps the plate to horizontally feed the plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110038053.2A CN112846552A (en) | 2021-01-12 | 2021-01-12 | Laser cutting and welding integrated knife and scissors manufacturing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110038053.2A CN112846552A (en) | 2021-01-12 | 2021-01-12 | Laser cutting and welding integrated knife and scissors manufacturing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112846552A true CN112846552A (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110038053.2A Pending CN112846552A (en) | 2021-01-12 | 2021-01-12 | Laser cutting and welding integrated knife and scissors manufacturing equipment |
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| Country | Link |
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| CN (1) | CN112846552A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113695912A (en) * | 2021-07-28 | 2021-11-26 | 安徽赢创激光科技有限公司 | Gas protection tool clamp complete device for laser welding heat transfer plates |
| CN114101893A (en) * | 2021-10-18 | 2022-03-01 | 上海友升铝业股份有限公司 | Aluminum alloy double-sided friction stir welding process |
| CN117359091A (en) * | 2023-12-07 | 2024-01-09 | 无锡市松洋工业自动化有限公司 | Processing method for processing power distribution cabinet with heat dissipation holes |
-
2021
- 2021-01-12 CN CN202110038053.2A patent/CN112846552A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113695912A (en) * | 2021-07-28 | 2021-11-26 | 安徽赢创激光科技有限公司 | Gas protection tool clamp complete device for laser welding heat transfer plates |
| CN114101893A (en) * | 2021-10-18 | 2022-03-01 | 上海友升铝业股份有限公司 | Aluminum alloy double-sided friction stir welding process |
| CN117359091A (en) * | 2023-12-07 | 2024-01-09 | 无锡市松洋工业自动化有限公司 | Processing method for processing power distribution cabinet with heat dissipation holes |
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Effective date of registration: 20240313 Address after: No. 5, 8th Road, Jiaoli East District, Zhongtang Town, Dongguan City, Guangdong Province, 523000 Applicant after: Guangdong Youhua New Material Technology Co.,Ltd. Country or region after: China Address before: 529500 b-1-2, Yinsha North 2nd Road, Yinling science and Technology Industrial Park, Jiangcheng, Yangjiang City, Guangdong Province Applicant before: Guangdong Youhua laser Intelligent Technology Co.,Ltd. Country or region before: China |
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