CN109465589A - Bourdon tube welding tooling and automatic welder - Google Patents
Bourdon tube welding tooling and automatic welder Download PDFInfo
- Publication number
- CN109465589A CN109465589A CN201811634041.0A CN201811634041A CN109465589A CN 109465589 A CN109465589 A CN 109465589A CN 201811634041 A CN201811634041 A CN 201811634041A CN 109465589 A CN109465589 A CN 109465589A
- Authority
- CN
- China
- Prior art keywords
- bourdon tube
- welding
- sealing plug
- copper sleeve
- mounting base
- 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.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 78
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052802 copper Inorganic materials 0.000 claims abstract description 25
- 239000010949 copper Substances 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 238000003825 pressing Methods 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
-
- 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
- B23K13/00—Welding by high-frequency current heating
- B23K13/01—Welding by high-frequency current heating by induction heating
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
Abstract
The invention discloses a kind of Bourdon tube welding toolings: including backup plate, the backup plate is equipped with No.1 mounting base, No. two mounting bases and movable pressing board, the No.1 mounting base is for fixing copper sleeve, No. two plug sockets are for fixing sealing plug, the movable pressing board has the No.1 position for compressing Bourdon tube and copper sleeve, sealing plug assembly, and for being packed into or taking out No. two positions of Bourdon tube after opening；Invention additionally discloses a kind of automatic weldings of application tooling.There are two types of functions for Bourdon tube welding tooling tool of the invention, first is that the positioning for copper sleeve, sealing plug and Bourdon tube three is assembled, second is that the fixture as welding, additionally has the advantages that convenient for disassembly and assembly.On this basis, cooperate turntable automatic welding, the automatic welding of Bourdon tube and its accessory can be realized, have the advantages that speed of welding is fast, cost of labor is low, welding quality is good, enhance the competitiveness of product in market.
Description
Technical field
The present invention relates to technical fields of mechanical processing, and in particular to arrives a kind of Bourdon tube welding tooling and automatic welder.
Background technique
In the manufacture of the instrument such as pressure gauge, thermometer, capillary, Bourdon tube (bourdon tube), copper plug, attaching nut etc.
Component has a large amount of welding, these welding mostly use artificial ratio-frequency welding at present.Artificial ratio-frequency welding needs worker's spirit high
The more problem of the defects of degree is concentrated, and large labor intensity, it is uneven that there are wire feeds, and the welding is not firm, slag inclusion, stomata, column trace, and
The weld horizontal of worker is also irregular, it is difficult to guarantee the consistency of product.
Applicant has applied for patent " semi-automatic welding machine (201820614987X) ", is able to achieve capillary and attaching nut
Automatic welding, applicant also applied for patent " pressure gauge (2018206149738) easily assembled ", copper sleeve and bowden
It requires to be welded between pipe, sealing plug and Bourdon tube, in irregular shape, welding difficulty is big.Based on the above background, apply
People wishes to develop the automatic welder that a kind of pair of Bourdon tube and its accessory are welded.
Summary of the invention
In order to improve welding quality and reduce labor intensity of workers, raising production efficiency, the present invention provides a kind of bowdens
Pipe welding tooling and automatic welder.
The technical solution adopted by the invention is as follows:
A kind of Bourdon tube welding tooling, including backup plate, the backup plate are equipped with No.1 mounting base, No. two mounting bases and activity and press
Plate, the No.1 mounting base is for fixing copper sleeve, and for fixing sealing plug, the movable pressing board has No. two plug sockets
No.1 position for compressing Bourdon tube and copper sleeve, sealing plug assembly, and be used to being packed into or taking out Bourdon tube after opening
No. two positions.
A kind of automatic welder: including base, the base is equipped with disk operation platform, and the circumferential direction of the disk operation platform is
Even to be disposed with several above-mentioned Bourdon tube welding toolings, the disk operation platform is furnished with rotation drive device, edge on the base
The direction of rotation of disk operation platform is successively arranged feed station, scaling powder push station, welding post, material returned station；It is described into
Working space is set at material station, charging, assembly for copper sleeve, sealing plug and Bourdon tube；At the scaling powder push station
Fluxing agent pusher is installed；Be provided at the welding post orientation sensing device, welding induction coil apparatus, wire feeder,
Temperature measurer and smoke exhaust pipe；Unloading manipulator is provided at the material returned station.
The beneficial effects of the present invention are: there are two types of functions for Bourdon tube welding tooling tool of the invention, first is that for copper sleeve,
The positioning of sealing plug and Bourdon tube three are assembled, second is that the fixture as welding, additionally has the advantages that convenient for disassembly and assembly.Herein
On the basis of, cooperate turntable automatic welding, the automatic welding of Bourdon tube and its accessory can be realized, has speed of welding fast, artificial
Advantage at low cost, welding quality is good, enhances the competitiveness of product in market.
Preferred: the No.1 mounting base, No. two mounting bases are plug socket, and plugging direction is vertical with backup plate.
Preferred: the No.1 that the backup plate is equipped with respectively with No.1 mounting base, No. two mounting base perforations moves back die hole and No. two
Move back die hole.
Preferred: the movable pressing board is the swivel plate that backup plate end is arranged in, and is furnished with rotating handle, the activity pressure
Plate compresses the Bourdon tube by elastic component.
Preferred: the scaling powder pusher includes two syringe needles, respectively corresponds the copper sleeve and Bourdon tube, sealing plug
With the welding position of Bourdon tube.
Preferred: the welding post includes two groups set gradually, is respectively used to the copper sleeve and Bourdon tube, sealing
The welding of plug and Bourdon tube.
Preferred: welding post described in every group includes two wire feeders, for the two sides to the Bourdon tube weld
Wire feed simultaneously.
Preferred: the unloading manipulator includes discharge ram and discharging cylinder, and the discharging cylinder drives the discharging
Push rod is inserted into or that exits the Bourdon tube welding tooling moves back die hole.
It is preferred: to be additionally provided with stationary work-table, the wire reel of the wire feeder and discharging above the disk operation platform
Manipulator is mounted on the stationary work-table.
Detailed description of the invention
Fig. 1 be in the embodiment of the present invention Bourdon tube and its accessory assembly after schematic diagram.
Fig. 2 is the schematic diagram of Bourdon tube welding tooling in the embodiment of the present invention.
Fig. 3 is the schematic diagram in the embodiment of the present invention after movable pressing board opening.
Fig. 4 is the schematic diagram of another angle of Bourdon tube welding tooling in the embodiment of the present invention.
Fig. 5 is the schematic diagram of each station of automatic welder in the embodiment of the present invention.
Fig. 6 is the top view of automatic welder in the embodiment of the present invention.
Fig. 7 is the perspective view of automatic welder in the embodiment of the present invention.
Fig. 8 is the schematic diagram of scaling powder pusher in the embodiment of the present invention.
Fig. 9 is the schematic diagram of welding induction coil apparatus and wire feeder in the embodiment of the present invention.
Figure 10 is the schematic diagram of unloading manipulator in the embodiment of the present invention.
Copper sleeve 01, sealing plug 02, Bourdon tube 03,
Bourdon tube welding tooling 1, backup plate 101, No.1 mounting base 102, No. two mounting bases 103, movable pressing board 104, No.1s move back mould
Move back die hole 106, rotating handle 107, elastic component 108, base 2, disk operation platform 3, scaling powder pusher 4, weldering in hole 105, two
Connect induction coil apparatus 5, wire feeder 6, wire reel 601, unloading manipulator 7, discharge ram 701, discharging cylinder 702, regular worker
Make platform 8,
Feed station a, scaling powder push station b, welding post c, material returned station d.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
In embodiment, as shown in Fig. 1 ~ 4: a kind of Bourdon tube welding tooling 1, including backup plate 101 are set on the backup plate 101
There are 102, No. two mounting bases 103 of No.1 mounting base and movable pressing board 104, the No.1 mounting base 102 is used to fix copper sleeve 01,
For fixing sealing plug 02, the movable pressing board 104 has for by Bourdon tube 03 and copper sleeve No. two plug sockets 103
01, the No.1 position that the assembly of sealing plug 02 compresses, and it is used to be packed into or take out No. two positions of Bourdon tube 03 after opening.Wave
Stepping on the tool of pipe welding tooling 1, there are two types of functions, first is that the positioning for 03 three of copper sleeve 01, sealing plug 02 and Bourdon tube is assembled,
Second is that the fixture as welding, additionally has the advantages that convenient for disassembly and assembly.On this basis, cooperate turntable automatic welding
The automatic welding for realizing Bourdon tube and its accessory, has the advantages that speed of welding is fast, cost of labor is low, welding quality is good, enhances
The competitiveness of product in market.
In embodiment, as shown in Fig. 2 ~ 3: 102, No. two mounting bases 103 of the No.1 mounting base are plug socket, and grafting side
To vertical with backup plate 101.The present embodiment structure, copper sleeve 01 and the loading of sealing plug 02 are very convenient, and accurate positioning.
In embodiment, as shown in Fig. 2 ~ 3: the backup plate 101 be equipped with respectively with 102, No. two mounting bases 103 of No.1 mounting base
The No.1 of perforation moves back die hole 105 and No. two are moved back die hole 106.The No.1 of the present embodiment moves back die hole 105 and moves back die hole 106 with No. two and can adopt
It is turned a millstone with the realization of the form of inserted link or push rod, is easy to implement automatic discharging.
In embodiment, as shown in Figure 4: the movable pressing board 104 is the swivel plate of 101 end of backup plate to be arranged in, and be furnished with
Rotating handle 107, the movable pressing board 104 compress the Bourdon tube 03 by elastic component 108.The elastic component 108 of the present embodiment
It for a cylindrical spring, is mounted on backup plate 101 by bolt, structure is simple, and makes the rotation side of movable pressing board 104
Just.
In embodiment, as shown in Fig. 5 ~ 10, a kind of automatic welder: including base 2, the base 2 is equipped with disk operation
Platform 3, the disk operation platform 3 are arranged circumferentially several above-mentioned Bourdon tube welding toolings 1, the disk operation platform 3
Equipped with rotation drive device, along the direction of rotation of disk operation platform 3 is successively arranged feed station a, scaling powder pushes away on the base 2
Send station b, welding post c, material returned station d；Set working space at the feed station a, for copper sleeve 01, sealing plug 02 and
Charging, the assembly of Bourdon tube 03；Fluxing agent pusher 4 is installed at the scaling powder push station b；At the welding post c
It is provided with orientation sensing device, welding induction coil apparatus 5, wire feeder 6, temperature measurer and smoke exhaust pipe；It is set at the material returned station d
It is equipped with unloading manipulator 7.The principle of the present embodiment, effect are similar to applicant's earlier application patent (201820614987X), mention
High welding efficiency, welding quality, avoid the problem of human weld's wire feed is uneven, and the welding is not firm, reduce slag inclusion, gas
The defects of hole, column trace, and save manually, reduce production cost.
In embodiment, as shown in Figure 8: the scaling powder pusher 4 includes two syringe needles, respectively corresponds the copper sleeve 01
With the welding position of Bourdon tube 03, sealing plug 02 and Bourdon tube 03.Two syringe needles of scaling powder pusher 4 use U-shaped arranged side by side
Structure controls amount by dispenser, the scaling powder addition of two positions is completed in a station, so that device structure is tight
It gathers.
In embodiment, as shown in Figure 5, Figure 6: the welding post c includes two groups set gradually, is respectively used to the copper
The welding of connector 01 and Bourdon tube 03, sealing plug 02 and Bourdon tube 03.The present embodiment structure, copper sleeve 01 divides with sealing plug 02 is
Two station welding, avoid interfering with each other, guarantee welding quality.
In embodiment, as shown in Figure 9: welding post c described in every group includes two wire feeders 6, for the bowden
The two sides of 03 weld of pipe wire feed simultaneously.The present embodiment guarantees that soldering tin amount is sufficient and more using two sides simultaneously by the way of wire feed
Uniformly.
In embodiment, as shown in Figure 10: the unloading manipulator 7 includes discharge ram 701 and discharging cylinder 702, described
Discharging cylinder 702 drives what the discharge ram 701 was inserted into or exited the Bourdon tube welding tooling 1 to move back die hole.The present embodiment
Discharge ram 701 be two, moving back die hole 105, two with No.1 respectively, to move back die hole 106 corresponding, while being inserted realization and moving back
Mould, two discharge rams 701 act on simultaneously, guarantee stress balance, avoid part of damage.
In embodiment, as shown in Figure 7: stationary work-table 8, the wire feeder 6 are additionally provided with above the disk operation platform 3
Wire reel 601 and unloading manipulator 7 be mounted on the stationary work-table 8.8 size of stationary work-table of the present embodiment is less than
Disk operation platform 3 in this way can be obvious primarily as the placement platform of wire reel 601, unloading manipulator 7 and other mechanisms
Reduce the size of base 2, to reduce the size of equipment, saves workshop space.
The present embodiment welding machine is the improvement made on the basis of applicant's earlier application patent (201820614987X), therefore
The only difference of both descriptions and improvements, about scaling powder pusher 4, welding induction coil apparatus 5, wire feeder 6, thermometric
The specific structure of instrument and smoke exhaust pipe, details are not described herein again.
Obviously, the above embodiment of the present invention is intended to be merely illustrative of the present example, and not to the present invention
Embodiment restriction.For those of ordinary skill in the art, it can also make on the basis of the above description
Other various forms of variations or variation.There is no need and unable to give poor example to all embodiments.And these belong to this
The connotation changes and variations that derived from of invention still fall within protection scope of the present invention.
Claims (10)
1. a kind of Bourdon tube welding tooling (1), it is characterised in that: including backup plate (101), the backup plate (101) is equipped with No.1
Mounting base (102), No. two mounting bases (103) and movable pressing board (104), the No.1 mounting base (102) are used to fix copper sleeve
(01), No. two plug sockets (103) are for fixing sealing plug (02), and the movable pressing board (104) has for by Bourdon tube
(03) the No.1 position compressed with copper sleeve (01), sealing plug (02) assembly, and be used to being packed into or taking out Bourdon tube after opening
(03) No. two positions.
2. Bourdon tube welding tooling (1) according to claim 1, it is characterised in that: the No.1 mounting base (102), two
Number mounting base (103) is plug socket, and plugging direction is vertical with backup plate (101).
3. Bourdon tube welding tooling (1) according to claim 2, it is characterised in that: the backup plate (101) be equipped with respectively with
No.1 mounting base (102), the No.1 of No. two mounting base (103) perforations move back die hole (105) and move back die hole (106) with No. two.
4. Bourdon tube welding tooling (1) according to claim 1, it is characterised in that: the movable pressing board (104) is setting
Swivel plate in backup plate (101) end, and it is furnished with rotating handle (107), the movable pressing board (104) passes through elastic component (108)
Compress the Bourdon tube (03).
5. a kind of automatic welder, it is characterised in that: including base (2), the base (2) is equipped with disk operation platform (3), described
Disk operation platform (3) has been arranged circumferentially several Bourdon tube welding toolings (1) as described in claim 1, the turntable
Workbench (3) is furnished with rotation drive device, is successively arranged charging along the direction of rotation of disk operation platform (3) on the base (2)
Station (a), scaling powder push station (b), welding post (c), material returned station (d)；
Feed station (a) place sets working space, for copper sleeve (01), sealing plug (02) and Bourdon tube (03) charging,
Assembly；
The scaling powder push place station (b) installation fluxing agent pusher (4)；
Welding post (c) place is provided with orientation sensing device, welding induction coil apparatus (5), wire feeder (6), temperature measurer
And smoke exhaust pipe；
Material returned station (d) place is provided with unloading manipulator (7).
6. automatic welder according to claim 5, it is characterised in that: the scaling powder pusher (4) includes two syringe needles,
Respectively correspond the welding position of the copper sleeve (01) and Bourdon tube (03), sealing plug (02) and Bourdon tube (03).
7. automatic welder according to claim 5, it is characterised in that: the welding post (c) includes two set gradually
Group is respectively used to the welding of the copper sleeve (01) Yu Bourdon tube (03), sealing plug (02) and Bourdon tube (03).
8. automatic welder according to claim 7, it is characterised in that: welding post (c) described in every group includes two wire feeds
Device (6), for the two sides to the Bourdon tube (03) weld while wire feed.
9. automatic welder according to claim 5, it is characterised in that: the unloading manipulator (7) includes discharge ram
(701) it drives discharge ram (701) insertion with discharging cylinder (702), the discharging cylinder (702) or exits the bowden
Pipe welding tooling (1) moves back die hole.
10. automatic welder according to claim 5, it is characterised in that: be additionally provided with fixation above the disk operation platform (3)
Workbench (8), the wire reel (601) of the wire feeder (6) and unloading manipulator (7) are mounted on the stationary work-table (8)
On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811634041.0A CN109465589A (en) | 2018-12-29 | 2018-12-29 | Bourdon tube welding tooling and automatic welder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811634041.0A CN109465589A (en) | 2018-12-29 | 2018-12-29 | Bourdon tube welding tooling and automatic welder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109465589A true CN109465589A (en) | 2019-03-15 |
Family
ID=65677396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811634041.0A Pending CN109465589A (en) | 2018-12-29 | 2018-12-29 | Bourdon tube welding tooling and automatic welder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109465589A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672912A (en) * | 2018-05-28 | 2018-10-19 | 昆山镭普森自动化科技有限公司 | A kind of pressure gauge bonding machine |
| CN110270727A (en) * | 2019-07-26 | 2019-09-24 | 舟山市普陀欧凯仪表有限公司 | A kind of automatic welding machine and welding method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1387830A (en) * | 1971-09-29 | 1975-03-19 | Pressed Steel Fisher Ltd | Welding apparatus |
| SU804318A1 (en) * | 1979-03-05 | 1981-02-15 | Проектно-Конструкторский Технологичес-Кий Институт | Device for assembling and welding articles |
| CN106914694A (en) * | 2017-04-19 | 2017-07-04 | 朱剑 | A kind of electrokinetic cell safe cap lug orifice plate ultrasonic wave automatic welding machine |
| CN206382775U (en) * | 2017-01-11 | 2017-08-08 | 重庆昆仑仪表有限公司 | Instrument welding tooling |
| CN107363368A (en) * | 2016-05-13 | 2017-11-21 | 浙江盾安禾田金属有限公司 | A kind of automatic welder |
| CN107414225A (en) * | 2017-09-06 | 2017-12-01 | 马鞍山市奈特仪表科技有限公司 | A kind of Medical C type Bourdon pressure gauge and its production method |
| CN208214639U (en) * | 2018-04-27 | 2018-12-11 | 舟山市佳尔灵仪表有限公司 | Semi-automatic welding machine |
| CN209303975U (en) * | 2018-12-29 | 2019-08-27 | 舟山市佳尔灵仪表有限公司 | Bourdon tube welding tooling and automatic welder |
-
2018
- 2018-12-29 CN CN201811634041.0A patent/CN109465589A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1387830A (en) * | 1971-09-29 | 1975-03-19 | Pressed Steel Fisher Ltd | Welding apparatus |
| SU804318A1 (en) * | 1979-03-05 | 1981-02-15 | Проектно-Конструкторский Технологичес-Кий Институт | Device for assembling and welding articles |
| CN107363368A (en) * | 2016-05-13 | 2017-11-21 | 浙江盾安禾田金属有限公司 | A kind of automatic welder |
| CN206382775U (en) * | 2017-01-11 | 2017-08-08 | 重庆昆仑仪表有限公司 | Instrument welding tooling |
| CN106914694A (en) * | 2017-04-19 | 2017-07-04 | 朱剑 | A kind of electrokinetic cell safe cap lug orifice plate ultrasonic wave automatic welding machine |
| CN107414225A (en) * | 2017-09-06 | 2017-12-01 | 马鞍山市奈特仪表科技有限公司 | A kind of Medical C type Bourdon pressure gauge and its production method |
| CN208214639U (en) * | 2018-04-27 | 2018-12-11 | 舟山市佳尔灵仪表有限公司 | Semi-automatic welding machine |
| CN209303975U (en) * | 2018-12-29 | 2019-08-27 | 舟山市佳尔灵仪表有限公司 | Bourdon tube welding tooling and automatic welder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672912A (en) * | 2018-05-28 | 2018-10-19 | 昆山镭普森自动化科技有限公司 | A kind of pressure gauge bonding machine |
| CN110270727A (en) * | 2019-07-26 | 2019-09-24 | 舟山市普陀欧凯仪表有限公司 | A kind of automatic welding machine and welding method |
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