CN110653471A - Welding device for sheet metal machining - Google Patents
Welding device for sheet metal machining Download PDFInfo
- Publication number
- CN110653471A CN110653471A CN201910815348.9A CN201910815348A CN110653471A CN 110653471 A CN110653471 A CN 110653471A CN 201910815348 A CN201910815348 A CN 201910815348A CN 110653471 A CN110653471 A CN 110653471A
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- sheet metal
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- 238000003466 welding Methods 0.000 title claims abstract description 124
- 239000002184 metal Substances 0.000 title abstract description 17
- 238000003754 machining Methods 0.000 title abstract description 8
- 239000007921 spray Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000005555 metalworking Methods 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004021 metal welding 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
Images
Classifications
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
- B23K11/115—Spot welding by means of two electrodes placed opposite one another on both sides of the welded parts
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a welding device for sheet metal machining, which comprises a supporting base, wherein protective guide devices are fixedly connected to the top of the supporting base, which is positioned on two sides of a welding box, a supporting frame is fixedly connected to the middle position of the bottom of an inner cavity of the welding box, an adjusting device is fixedly connected to the bottom of the side, which is close to the supporting frame, of the supporting base, a welding table is fixedly connected to the side, which is far away from the bottom of the inner cavity of the welding box, of the adjusting device, the outer walls of the two sides of the welding protection box, which are positioned on the front side and the back side of an electric telescopic rod, are symmetrically connected with a fastening and positioning device in a sliding mode, a spray head is fixedly connected to the bottom of the welding protection. The sheet metal component that effectual fixes a position to be applicable to different thickness, need not the manual work and unload, convenient and fast, the precision is accurate, is favorable to protecting personal safety, and with self-cleaning, can effectively avoid piece harm equipment safety.
Description
Technical Field
The invention relates to the technical field of metal plates, in particular to a welding device for metal plate machining.
Background
At present, in the sheet metal manufacturing industry, welding is widely applied as a common connecting method, and a current spot welding method is adopted at present to place two sheet metal plates made of the same material between two welding electrodes for welding. The tip area of a welding electrode of spot welding is small and generally approximate to the size of a desired welding spot, when the welding electrodes on two sides are electrified, a large amount of resistance heat is generated at the contact part of the welding electrode and the plates through a large enough current, so that a molten pool is generated by taking the area of the two plates, which is aligned with the welding electrode, as the center, when the molten pool meets the size of the welding spot, the power is cut off and the two plates are cooled, and a welding spot with a certain area is formed in the molten pool area before the two workpieces are fused together. The existing metal plate welding processing equipment cannot be effectively positioned, and manual unloading is needed after processing, so that the processing precision cannot be guaranteed, and the personal safety is easily damaged by welding scraps.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a welding device for sheet metal machining, which solves the problems that the existing sheet metal welding machining equipment cannot effectively position, and the manual unloading is needed after the machining, so that the machining precision cannot be ensured, and the personal safety is easily damaged by welding scraps.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a welding device for sheet metal processing comprises a supporting base, wherein a welding box is fixedly connected at the middle position of the top of the supporting base, protective guide devices are fixedly connected at the two sides of the welding box at the top of the supporting base, a supporting frame is fixedly connected at the middle position of the bottom of an inner cavity of the welding box, an adjusting device is fixedly connected at the bottom of one side, close to each other, of the supporting frame, a welding table is fixedly connected at one side, far away from the bottom of the inner cavity of the welding box, of the adjusting device, electric telescopic rods are fixedly connected at the symmetrical positions of the top of the inner cavity of the welding box, one end, far away from the welding box, of each electric telescopic rod is fixedly connected with a welding protection box, a welding device is movably connected at the middle position of the top of the inner cavity of the welding protection box, protective devices are fixedly connected at the two sides of the welding device at the, welding protection bottom of the case portion is located welder left side fixedly connected with shower nozzle, welding incasement chamber top is located electric telescopic handle left side fixedly connected with water pump, welding incasement chamber top is located electric telescopic handle right side fixedly connected with intelligent control ware.
Preferably, the supporting base comprises a bottom plate, clamping grooves are formed in the bottom of the bottom plate symmetrically, an auxiliary spring is fixedly connected to the top of an inner cavity of each clamping groove, and a bottom foot is fixedly connected to one side, far away from each clamping groove, of each auxiliary spring.
Preferably, the protection guide device includes the outer container, outer container internal surface sliding connection has the interior slide, the screen cloth is assisted to one side bottom fixedly connected with that the interior slide is close to each other, interior slide top fixedly connected with plays the board, the small opening has been seted up to play board intermediate position, interior slide inner chamber is provided with the protection sand.
Preferably, the adjusting device comprises an adjusting motor, the output end of the adjusting motor is fixedly connected with a driving belt wheel through a coupler, the outer surface of the driving belt wheel is connected with a driven belt wheel through a transmission belt in a sliding manner, an adjusting screw rod is fixedly connected to the inner surface of the driven belt wheel, and an adjusting rod is in threaded connection with the outer surface of the adjusting screw rod.
Preferably, the outer surface of the adjusting motor is fixedly connected with the support frame, the top of the adjusting screw is rotatably connected with the support frame, and the top of the adjusting rod is fixedly connected with the welding table.
Preferably, the outer surface of the welding table is connected with the support frame in a sliding mode, and the top of the welding table is connected with the welding table in a sliding mode.
Preferably, protection device includes the guard box, guard box inner chamber bottom fixedly connected with guard bar, guard bar surface bottom cover is equipped with protection spring, guard bar surface top sliding connection has the protection slider, one side fixedly connected with protection roof that protection spring was kept away from to the protection slider.
Preferably, fastening positioner includes the connecting rod, one side intermediate position sliding connection that welding protection case was kept away from to the connecting rod has the locating lever, locating lever surface top cover is equipped with fastening spring, locating lever bottom fixedly connected with driver, the driver output passes through shaft coupling fixedly connected with fastening wheel.
Preferably, the output end of the water pump is communicated with the spray head through a hose, and the input end of the water pump is communicated with a water source.
Preferably, the outer walls of the two sides of the welding box are provided with an inlet and an outlet at the positions of the welding table, and the inner cavities of the inlet and the outlet are rotatably connected with guide plates.
(III) advantageous effects
The invention provides a welding device for sheet metal processing, which has the following beneficial effects:
the invention is characterized in that a welding box is fixedly connected with the middle position of the top of a support base, protective material guiding devices are fixedly connected with the top of the support base at the two sides of the welding box, a support frame is fixedly connected with the middle position of the bottom of an inner cavity of the welding box, an adjusting device is fixedly connected with the bottom of the side, close to each other, of the support frame, a welding table is fixedly connected with the side, far away from the bottom of the inner cavity of the welding box, of the adjusting device, electric telescopic rods are fixedly connected with the symmetrical positions of the top of the inner cavity of the welding box, one end, far away from the welding box, of each electric telescopic rod is fixedly connected with the welding protection box, a welder is movably connected with the middle position of the top of the inner cavity of the welding protection box, protective devices are fixedly connected with the top of the inner cavity of the welding protection, welding incasement chamber top is located electric telescopic handle left side fixedly connected with water pump, and the device can effectually fix a position to be applicable to the sheet metal component of different thickness, need not the manual work and unload, convenient and fast, the precision is accurate, is favorable to protecting people's personal safety, and with self-cleaning, can effectively avoid the piece to endanger equipment safety.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a protective material guiding device according to the present invention;
FIG. 3 is a schematic view of the adjusting device according to the present invention;
FIG. 4 is a schematic view of the protection device of the present invention;
FIG. 5 is a schematic view of the fastening and positioning device of the present invention.
In the figure: 1-supporting base, 101-bottom plate, 102-clamping groove, 103-auxiliary spring, 104-bottom foot, 2-welding box, 3-protective material guiding device, 31-outer box, 32-inner sliding plate, 33-auxiliary screen, 34-elastic plate, 35-leak hole, 36-protective sand, 4-supporting frame, 5-adjusting device, 51-adjusting motor, 52-driving belt wheel, 53-driving belt, 54-driven belt wheel, 55-adjusting screw, 56-adjusting rod, 6-welding table, 7-electric telescopic rod, 8-welding protecting box, 9-welder, 10-protecting device, 1001-protecting box, 1002-protecting rod, 1003-protecting spring, 1004-protecting slide block, 1005-protecting top plate, 11-fastening positioning device, 111-connecting rod, 112-positioning rod, 113-fastening spring, 114-driver, 115-fastening wheel, 12-spray head, 13-water pump, 14-intelligent controller, 15-inlet and outlet, and 16-guide plate.
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. 1-5, the present invention provides a technical solution: the utility model provides a welding set for sheet metal working, including supporting base 1, support 1 top intermediate position fixedly connected with welding case 2 of base, it is located welding case 2 both sides equal fixedly connected with protection guide device 3 to support 1 top of base, welding case 2 inner chamber bottom intermediate position fixedly connected with support frame 4, one side bottom fixedly connected with adjusting device 5 that support frame 4 is close to each other, one side fixedly connected with welding bench 6 of 2 inner chamber bottoms of welding case is kept away from to adjusting device 5, the equal fixedly connected with electric telescopic handle 7 in 2 inner chamber top symmetric positions of welding case, electric telescopic handle 7 keeps away from welding case 2's one end fixedly connected with welding guard box 8, 8 inner chamber top intermediate position swing joint of welding guard box have the welding ware 9, 8 inner chamber tops of welding guard box are located the equal fixedly connected with protection device 10 in welding ware 9 both sides, 8 both sides outer wall of welding guard box are located the equal sliding connection of electric telescopic handle 7 front and the equal fixed position device of back 11, welding protection case 8 bottom is located welder 9 left side fixedly connected with shower nozzle 12, and 2 inner chamber tops of welding case are located 7 left sides fixedly connected with water pumps 13 of electric telescopic handle, and 2 inner chamber tops of welding case are located 7 right sides fixedly connected with intelligent control ware 14 of electric telescopic handle.
The supporting base 1 comprises a bottom plate 101, clamping grooves 102 are formed in the bottom of the bottom plate 101 in the symmetrical position, an auxiliary spring 103 is fixedly connected to the top of an inner cavity of each clamping groove 102, and a bottom foot 104 is fixedly connected to one side, far away from the clamping grooves 102, of the auxiliary spring 103.
The adjusting device 5 comprises an adjusting motor 51, the output end of the adjusting motor 51 is fixedly connected with a driving belt wheel 52 through a coupler, the outer surface of the driving belt wheel 52 is slidably connected with a driven belt wheel 54 through a transmission belt 53, the inner surface of the driven belt wheel 54 is fixedly connected with an adjusting screw 55, and the outer surface of the adjusting screw 55 is in threaded connection with an adjusting rod 56.
The outer surface of the adjusting motor 51 is fixedly connected with the support frame 4, the top of the adjusting screw 55 is rotatably connected with the support frame 4, and the top of the adjusting rod 56 is fixedly connected with the welding table 6.
The outer surface of the welding table 6 is connected with the support frame 4 in a sliding mode, and the top of the welding table 6 is connected with the welding table 6 in a sliding mode.
Fastening positioner 11 includes connecting rod 111, and connecting rod 111 keeps away from one side intermediate position sliding connection of welding protection case 8 has locating lever 112, and locating lever 112 surface top cover is equipped with fastening spring 113, and locating lever 112 bottom fixedly connected with driver 114, the driver 114 output passes through shaft coupling fixedly connected with fastening wheel 115.
The output end of the water pump 13 is communicated with the spray head 12 through a hose, and the input end of the water pump 13 is communicated with a water source.
An access 15 is arranged on the outer walls of the two sides of the welding box 2 and positioned on the welding table 6, and a guide plate 16 is rotatably connected to the inner cavity of the access 15.
The device can effectually fix a position to be applicable to the sheet metal component of different thickness, need not the manual work and unload, convenient and fast, the precision is accurate, is favorable to protecting personal safety, and with self-cleaning, can effectively avoid piece harm equipment safety.
During the use, carry the sheet metal component to the welding bench 6 through access & exit 15 on, start adjusting motor 51 and make driving pulley 52 rotate, drive driven pulley 54 through driving belt 53 and rotate, make adjusting screw 55 rotate, make adjusting rod 56 drive welding bench 6 to adjust through threaded connection, start electric telescopic handle 7 and make welding protection box 8 vertical motion, and make fastening wheel 115 and sheet metal component contact and fastening, later start welding ware 9 and accomplish the welding, later start driver 114 and make fastening wheel 115 rotate, advance the transportation to the sheet metal component, make it pass through access & exit 15 output, and fall on protection guide device 3, start water pump 13 and wash and cool down the equipment inside through shower nozzle 12, so that subsequent processing.
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. Without further limitation. The phrase "comprising a defined element does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
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 (10)
1. The utility model provides a welding set for sheet metal working, includes support base (1), its characterized in that: support base (1) top intermediate position fixedly connected with welding case (2), support base (1) top and be located welding case (2) both sides equal fixedly connected with protection guide device (3), welding case (2) inner chamber bottom intermediate position fixedly connected with support frame (4), one side bottom fixedly connected with adjusting device (5) that support frame (4) are close to each other, one side fixedly connected with welding bench (6) of welding case (2) inner chamber bottom are kept away from in adjusting device (5), the equal fixedly connected with electric telescopic handle (7) of welding case (2) inner chamber top symmetric position, the one end fixedly connected with welding protection case (8) of welding case (2) are kept away from in electric telescopic handle (7), welding protection case (8) inner chamber top intermediate position swing joint has welder (9), welding protection case (8) inner chamber top is located welder (9) both sides equal fixedly connected with protection device (3) 10) The welding protection box (8) is characterized in that outer walls of two sides of the welding protection box (8) are located on the front side of the electric telescopic rod (7) and are connected with a fastening positioning device (11) in a sliding mode through the symmetrical positions of the back side, the bottom of the welding protection box (8) is located on the left side of the welder (9) and is fixedly connected with a sprayer (12), the top of an inner cavity of the welding box (2) is located on the left side of the electric telescopic rod (7) and is fixedly connected with an intelligent controller (14), and the top of the inner cavity of the welding box (2) is located on the.
2. The welding device for sheet metal working according to claim 1, characterized in that: the supporting base (1) comprises a bottom plate (101), clamping grooves (102) are formed in the bottom of the bottom plate (101) in a symmetrical mode, an auxiliary spring (103) is fixedly connected to the top of an inner cavity of each clamping groove (102), and a bottom foot (104) is fixedly connected to one side, far away from the clamping grooves (102), of the auxiliary spring (103).
3. The welding device for sheet metal working according to claim 1, characterized in that: protection guide device (3) are including outer container (31), outer container (31) internal surface sliding connection has interior slide (32), screen cloth (33) are assisted to one side bottom fixedly connected with that interior slide (32) are close to each other, interior slide (32) top fixedly connected with plays board (34), small opening (35) have been seted up to play board (34) intermediate position, interior slide (32) inner chamber is provided with protection sand (36).
4. The welding device for sheet metal working according to claim 1, characterized in that: adjusting device (5) are including adjusting motor (51), adjusting motor (51) output passes through shaft coupling fixedly connected with driving pulley (52), driving pulley (52) surface has driven pulley (54) through driving belt (53) sliding connection, driven pulley (54) internal surface fixedly connected with adjusting screw (55), adjusting screw (55) surface threaded connection has regulation pole (56).
5. The welding device for sheet metal working according to claim 4, characterized in that: the outer surface of the adjusting motor (51) is fixedly connected with the support frame (4), the top of the adjusting screw rod (55) is rotatably connected with the support frame (4), and the top of the adjusting rod (56) is fixedly connected with the welding table (6).
6. The welding device for sheet metal working according to claim 1, characterized in that: the outer surface of the welding table (6) is connected with the support frame (4) in a sliding mode, and the top of the welding table (6) is connected with the welding table (6) in a sliding mode.
7. The welding device for sheet metal working according to claim 1, characterized in that: the protection device (10) comprises a protection box (1001), a protection rod (1002) is fixedly connected to the bottom of an inner cavity of the protection box (1001), a protection spring (1003) is sleeved on the bottom of the outer surface of the protection rod (1002), a protection sliding block (1004) is slidably connected to the top of the outer surface of the protection rod (1002), and a protection top plate (1005) is fixedly connected to one side, away from the protection spring (1003), of the protection sliding block (1004).
8. The welding device for sheet metal working according to claim 1, characterized in that: fastening positioner (11) are including connecting rod (111), one side intermediate position sliding connection that welding protection case (8) was kept away from in connecting rod (111) has locating lever (112), locating lever (112) surface top cover is equipped with fastening spring (113), locating lever (112) bottom fixedly connected with driver (114), shaft coupling fixedly connected with fastening wheel (115) is passed through to driver (114) output.
9. The welding device for sheet metal working according to claim 1, characterized in that: the output end of the water pump (13) is communicated with the spray head (12) through a hose, and the input end of the water pump (13) is communicated with a water source.
10. The welding device for sheet metal working according to claim 1, characterized in that: the outer walls of the two sides of the welding box (2) are positioned at the welding table (6) and provided with an inlet and an outlet (15), and guide plates (16) are rotatably connected to inner cavities of the inlet and the outlet (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910815348.9A CN110653471B (en) | 2019-08-30 | 2019-08-30 | Welding device for sheet metal machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910815348.9A CN110653471B (en) | 2019-08-30 | 2019-08-30 | Welding device for sheet metal machining |
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| Publication Number | Publication Date |
|---|---|
| CN110653471A true CN110653471A (en) | 2020-01-07 |
| CN110653471B CN110653471B (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910815348.9A Active CN110653471B (en) | 2019-08-30 | 2019-08-30 | Welding device for sheet metal machining |
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| Country | Link |
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| CN (1) | CN110653471B (en) |
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| JP2013212522A (en) * | 2012-04-02 | 2013-10-17 | Mazda Motor Corp | Method and device for indirect spot welding |
| CN107498152A (en) * | 2017-09-06 | 2017-12-22 | 江苏菲达环保科技有限公司 | A kind of large area metal plate tool structure automatic soldering device for being classified positioning |
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| CN207479893U (en) * | 2017-11-03 | 2018-06-12 | 嵊州市鑫林机械有限公司 | A kind of metal plate welder |
| CN207788038U (en) * | 2017-12-29 | 2018-08-31 | 常州信息职业技术学院 | A kind of electric appliance sheet metal component assembly welding machine |
| CN207806888U (en) * | 2018-02-02 | 2018-09-04 | 东莞市蓝胜五金科技有限公司 | A kind of high-precision metal plate part is quickly cooled down efficient laser welding device |
| CN108838848A (en) * | 2018-07-19 | 2018-11-20 | 安徽天裕汽车零部件制造有限公司 | A kind of automobile metal accessory processing surface fine grinding device |
-
2019
- 2019-08-30 CN CN201910815348.9A patent/CN110653471B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002035953A (en) * | 2000-07-28 | 2002-02-05 | Honda Motor Co Ltd | Electric welding gun and the control method |
| JP2013212522A (en) * | 2012-04-02 | 2013-10-17 | Mazda Motor Corp | Method and device for indirect spot welding |
| CN207205542U (en) * | 2017-05-15 | 2018-04-10 | 广州思尔特机器人科技有限公司 | One kind is used to share bicycle pannier's welder |
| CN107498152A (en) * | 2017-09-06 | 2017-12-22 | 江苏菲达环保科技有限公司 | A kind of large area metal plate tool structure automatic soldering device for being classified positioning |
| CN207479893U (en) * | 2017-11-03 | 2018-06-12 | 嵊州市鑫林机械有限公司 | A kind of metal plate welder |
| CN207788038U (en) * | 2017-12-29 | 2018-08-31 | 常州信息职业技术学院 | A kind of electric appliance sheet metal component assembly welding machine |
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| CN110653471B (en) | 2021-09-07 |
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Effective date of registration: 20220412 Address after: 313000 Building 1, 618 Xifeng Road, Huzhou Economic and Technological Development Zone, Huzhou City, Zhejiang Province Patentee after: HUZHOU LONGHAO AUTO PARTS Co.,Ltd. Address before: 313025 west of Gongye 3rd road and north of Gongye 4th Road, Miaoxi Town, Wuxing District, Huzhou City, Zhejiang Province Patentee before: HUZHOU LONGYI MACHINERY Co.,Ltd. |
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Application publication date: 20200107 Assignee: Zhejiang Hulian New Energy Industry Technology Service Co.,Ltd. Assignor: HUZHOU LONGHAO AUTO PARTS Co.,Ltd. Contract record no.: X2023330000885 Denomination of invention: A welding device for sheet metal processing Granted publication date: 20210907 License type: Common License Record date: 20231129 |