CN107262987A - A kind of web member end socket double-face automatic welding device - Google Patents
A kind of web member end socket double-face automatic welding device Download PDFInfo
- Publication number
- CN107262987A CN107262987A CN201710702539.5A CN201710702539A CN107262987A CN 107262987 A CN107262987 A CN 107262987A CN 201710702539 A CN201710702539 A CN 201710702539A CN 107262987 A CN107262987 A CN 107262987A
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- Prior art keywords
- web member
- module
- welding
- material containing
- end socket
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- 238000003466 welding Methods 0.000 title claims abstract description 108
- 230000007246 mechanism Effects 0.000 claims abstract description 55
- 239000000463 material Substances 0.000 claims abstract description 37
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 230000001360 synchronised effect Effects 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 3
- 238000005058 metal casting Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 241000736199 Paeonia Species 0.000 abstract 1
- 235000006484 Paeonia officinalis Nutrition 0.000 abstract 1
- 230000032258 transport Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000002360 preparation method 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
-
- 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
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0211—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track
-
- 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
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0538—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor for rotating tubes, e.g. rollers
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a kind of web member end socket double-face automatic welding device, including lathe bed, headstock, heel post, horizontal guide rail, automatic welding mechanism, bin platform, material containing car, jacking module, jacking mechanism, rotating disk, saddle；Described lathe bed one end is provided with headstock, and the other end is coaxially provided with jacking mechanism；The lathe bed is provided with two heel posts and horizontal guide rail, the horizontal guide rail equipped with two sets of automatic welding mechanisms；The front portion of the lathe bed is provided with bin platform, material containing car, and the material containing Chinese herbaceous peony end is provided with jacking module, and web member component is transported to welding post by the jacking module by root；Two sets of welding guns are welded as web member to weld zone；Saddle of the web member along lathe bed rear portion is skidded off；The present invention transports web member by material containing car, and using steel pipe and end socket automatic assembling and compression joint mechanism, welding is synchronized to web member two ends end socket by two sets of automatic welding mechanisms, automation is carried out continuously web member weld job, weldering is high uniform, and face of weld quality is good, and welding efficiency is high.
Description
Technical field
The present invention relates to tower crane web member welding technique apparatus field, more particularly to a kind of two-sided automatic welding tipping of web member end socket
Put.
Background technology
Derrick crane is the widely used derrick crane tool of building trade, and tower body is its important composition part, but just
Chang Tashen volumes are big, and cost of transportation is high；Chip tower body being used prior art, the web member structure of chip tower body is both ends of the surface screens more
And it is welded with the round steel pipe of end socket；The web member of difference mark section is that cylindrical, length, arm are thick different, and the steel pipe two ends of web member are needed
Want end socket of being burn-on after chamfering.
In the prior art, the conventionally employed hand-turning welding of web member welding end socket, using artificial manual welding by artificial
The influence of factor, it welds high uneven, and face of weld is second-rate, and welding efficiency is low, and labor intensity is big, and welding total quality is not
It is stable, it is difficult to ensure the welding quality of each weld seam, cause the quality of chip tower body to be difficult to reliably be ensured.
The content of the invention
In order to solve the above technical problems, the invention provides a kind of web member end socket double-face automatic welding device, for existing
Deficiency in technology, web member is transported by material containing car, automatic by two sets using steel pipe and end socket automatic assembling and compression joint mechanism
Welding mechanism synchronizes welding to web member two ends end socket, and automation is carried out continuously web member weld job.
To reach above-mentioned purpose, technical scheme is as follows：A kind of web member end socket double-face automatic welding device, including
Lathe bed, headstock, heel post, horizontal guide rail, automatic welding mechanism, move horizontally module, vertically move module, swing module, even
Extension bar, universal erector, welding gun, web member steel pipe, end socket, bin platform, material containing car, jacking module, jacking mechanism, rotating disk, lead
Frame, weld metal zone, it is characterised in that：
The lathe bed is metal casting, and its one end is fixedly installed the headstock of variable ratio frequency changer speed governing with rotating disk, separately
One end is coaxially arranged with jacking mechanism；The rotating disk clamps the web member steel pipe composition Welder for being equipped with end socket with jacking mechanism
Position；Two ends on rear side of the lathe bed are respectively arranged with two heel posts, and two heel post upper horizontals are provided with level and led
Roller is equipped with two sets of automatic welding mechanisms on rail, the horizontal guide rail；The anterior of the lathe bed sets material rack platform, the material
Roller, which is equipped with material containing car, the material containing car, on pallet is mounted with multiple web member steel pipes, and the material containing car is by web member steel pipe
Assembly station is pushed to, the shrouding of both sides is crimped with web member steel pipe is fixed as web member component；The front end of the material containing car is provided with
Jacking module, web member component is lifted by the V-type frame in jacking module；The material containing car conveys the web member component of jack-up by root
To welding post；The web member component is held out against by jacking mechanism, and rotating disk, which drives, to be rotated, while two sets of welding gun butt welding by two ends
Area is met to be welded and fixed as web member；After the completion of welding, the jacking mechanism unclamps web member, rear portion of the web member along lathe bed
The saddle of setting rolls and slides out to receiving section.
The automatic welding mechanism includes moving horizontally module, vertically moves module, swings module, connecting rod, universal installation
Device and welding gun；The module packaged type that moves horizontally is arranged on horizontal guide rail, and the module that vertically moves moves up and down formula
It is arranged at described move horizontally in module；The swing module is vertically moved in module described in being arranged at, in the swing module
Connecting rod is provided with, the lower end of the connecting rod, which is fixedly installed on universal erector, the universal erector, is equipped with welding gun.
Two ends synchronous to web member component two-sided carry out automatic welding of the automatic welding mechanism respectively at welding post.
It is provided with controller on the automatic soldering device, the controller and power distribution cabinet, automatic welding mechanism, moves horizontally
Module, vertically move module, swing module, universal erector, welding gun, material containing car, jacking module, jacking mechanism, rotating disk electricity
Gas signal is connected；The controller automatically controls web member steel pipe and the weld job of end socket is processed.
The present invention operation principle be：The headstock 1 of frequency control is installed in lathe bed, two pelvic cavity are installed in lathe bed side and stood
Post, installs horizontal guide rail on column, and a set of automatic welding mechanism, the automatic welding mechanism bag are respectively installed at the two ends of horizontal guide rail
Include can on horizontal guide rail left and right operation move horizontally module, can up and down operation vertically move module, swingable welding
Module and connecting rod are swung, is provided with the universal erector of universal adjustment, the universal erector and assembles in connecting rod lower end
There is welding gun；It is provided with headstock on rotating disk, the lathe bed of rotating disk opposite side and is provided with jacking mechanism, the rotating disk
Web member component is clamped between jacking mechanism, welding post is formed；The lathe bed front portion is provided with material containing car, by assembling end socket
Web member component is transported into Welder with lifting body to draw；Welding gun on two sets of automatic welding mechanisms, respectively to web member component two ends
Weld metal zone carry out weld job, complete after welding, jacking mechanism unclamps web member, saddle of the web member along lathe bed rear portion is slided
Go out.
By above-mentioned technical proposal, the beneficial effect of technical solution of the present invention is：Web member is transported by material containing car, using steel
Pipe and end socket automatic assembling and compression joint mechanism, synchronize welding, automatically by two sets of automatic welding mechanisms to web member two ends end socket
Change is carried out continuously web member weld job, and weldering is high uniform, and face of weld quality is good, and welding efficiency is high, reduces labor intensity, and welds whole
Weight is stable, and the quality of chip tower body is reliably ensured.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be in embodiment or description of the prior art
The required accompanying drawing used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present invention
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is a kind of web member end socket double-face automatic welding device front view schematic diagram disclosed in the embodiment of the present invention；
Fig. 2 is a kind of web member end socket double-face automatic welding device automatic welding mechanism signal disclosed in the embodiment of the present invention
Figure；
Fig. 3 is a kind of web member end socket double-face automatic welding device web member STRUCTURE DECOMPOSITION signal disclosed in the embodiment of the present invention
Figure；
Fig. 4 is a kind of web member end socket double-face automatic welding device steel pipe operating flow signal disclosed in the embodiment of the present invention
Figure；Fig. 4 a feed status figures, Fig. 4 b are jacking state diagram, and Fig. 4 c are welded condition figure.
Numeral and the corresponding component title represented by letter in figure：
1. the horizontal guide rail of 2. headstock of lathe bed, 3. heel post 4.
5. automatic welding mechanism 6. moves horizontally module 7. and vertically moves the swing module of module 8.
9. the universal web member steel pipe of 11. welding gun of erector 12. of connecting rod 10.
13. the jacking module of 14. bin platform of end socket, 15. material containing car 16.
17. the weld metal zone of 18. rotating disk of jacking mechanism, 19. saddle 20.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
According to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the invention provides a kind of web member end socket double-face automatic welding device, including bed
Body 1, headstock 2, heel post 3, horizontal guide rail 4, automatic welding mechanism 5, move horizontally module 6, vertically move module 7, swing mould
Block 8, connecting rod 9, universal erector 10, welding gun 11, web member steel pipe 12, end socket 13, bin platform 14, material containing car 15, jacking module
16th, jacking mechanism 17, rotating disk 18, saddle 19, weld metal zone 20.
The lathe bed 1 is metal casting, and its one end is fixedly installed the headstock of variable ratio frequency changer speed governing with rotating disk 18
2, the other end is coaxially arranged with jacking mechanism 17；The rotating disk 18 clamps the web member steel for being equipped with end socket 13 with jacking mechanism 17
Pipe 12 constitutes welding post；The two ends of the rear side of lathe bed 1 are respectively arranged with two heel posts 3, two tops of heel post 3
It is horizontally disposed to there is roller on horizontal guide rail 4, the horizontal guide rail 4 to be equipped with two sets of automatic welding mechanisms 5；Before the lathe bed 1
Portion set on material rack platform 14, the bin platform 14 roller be equipped with material containing car 15, the material containing car 15 be mounted with it is multiple
Web member steel pipe 12 is pushed to assembly station by web member steel pipe 12, the material containing car 15, and shrouding 13 and the web member steel pipe 12 of both sides are pressed
Connect and be fixed as web member component；The front end of the material containing car 15 is provided with jacking module 16, is lifted by the V-type frame in jacking module 16
Rise web member component；The web member component of jack-up is transported to welding post by the material containing car 15 by root；The web member component is by holding out against
Mechanism 17 is held out against, and rotating disk 18, which drives, to be rotated, while being welded and fixed by two sets of welding guns 11 at two ends to weld zone as web member；
After the completion of welding, the jacking mechanism 17 unclamps web member, and the saddle 19 that rear portion of the web member along lathe bed is set, which is rolled, to be skidded off
To receiving section.
The automatic welding mechanism 5 include moving horizontally module 6, vertically move module 7, swing module 8, it is connecting rod 9, universal
Erector 10 and welding gun 11；The packaged type of module 6 that moves horizontally is arranged on horizontal guide rail 4, described to vertically move module 7
The formula of moving up and down is arranged at described move horizontally in module 6；The swing module 8 is vertically moved in module 7 described in being arranged at, institute
State and be provided with connecting rod 9 in swing module 8, the lower end of the connecting rod 9 is fixedly installed universal erector 10, the universal peace
Welding gun 11 is equipped with dress device 10.
Two ends synchronous to web member component two-sided carry out automatic welding of the automatic welding mechanism 5 respectively at welding post.
Controller is provided with the automatic soldering device, the controller is moved with power distribution cabinet, automatic welding mechanism 5, level
Dynamic model block 6, module 7 is vertically moved, module 8, universal erector 10 is swung, welding gun 11, material containing car 15, jacking module 16, holds out against
Mechanism 17, the connection of the electric signal of rotating disk 18；The weld job that the controller automatically controls web member steel pipe 12 and end socket 13 adds
Work.
The present invention specific implementation operating procedure be：Steel pipe 12 is placed on material containing car 15, promotes steel pipe 12 to enter jacking
Material containing car 15 is run Working position by the position of module 16, the jack-up steel pipe 12 of jacking module 16 to operation height, startup optimization device,
Shrouding 13 is installed in stuck-module, jacking mechanism 17 is run, two end socket 13 is pressed into welding position, jacking module 16 is put
Under, material containing car 15 is exited, and controller starts automatic welding pattern, and different web member correspondence different working modes are pacified in machine
Set when debuging examination；Jacking mechanism 17 is unclamped in welding after terminating, web member leaves welding post into saddle 19 under gravity,
Complete a flow；For processing first, it is necessary to check welding quality, such as meet the requirements, normal process is not met such as to machine
It is adjusted until qualified.
Debugging flow is：After web member component enters welding post, move horizontally module 6 and automatic welding mechanism 5 is moved into phase
The position of weld metal zone 20 answered, vertically moves module 7 and welding gun 11 is moved on to suitable height, and welding gun 11 is adjusted with universal erector 10
In normal position, save location retracts welding gun 11, welding machine does not start by hand；Automatic welding flow is started by controller, this
When welding machine do not work, the driving rotating disk 18 of headstock 2 drives web member component to rotate, observation welding gun 11 and the operating position of weld metal zone 20
Put and rotary speed, such as it is incorrect, adjust again, until be suitable for；Start welding machine, regulate electric current, voltage, swing module
8 frequency and amplitude, opens automatic mode and is welded, and after an intact steel pipe is welded, welding quality is checked, according to present situation
Regulation parameter, untill qualified, stores good model.
By above-mentioned specific embodiment, the beneficial effects of the invention are as follows：Web member is transported by material containing car, using steel pipe and envelope
Head automatic assembling and compression joint mechanism, welding is synchronized to web member two ends end socket by two sets of automatic welding mechanisms, and automation is continuous
Web member weld job is carried out, weldering is high uniform, and face of weld quality is good, and welding efficiency is high, reduces labor intensity, and welds total quality
Stable, the quality of chip tower body is reliably ensured.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (4)
1. a kind of web member end socket double-face automatic welding device, it is characterised in that led including lathe bed, headstock, heel post, level
Rail, automatic welding mechanism, move horizontally module, vertically move module, swing module, connecting rod, universal erector, welding gun, web member
Steel pipe, end socket, bin platform, material containing car, jacking module, jacking mechanism, rotating disk, saddle, weld metal zone；The lathe bed is metal casting
Part, its one end is fixedly installed the headstock of variable ratio frequency changer speed governing with rotating disk, and the other end is coaxially arranged with jacking mechanism；
The rotating disk clamps the web member steel pipe composition welding post for being equipped with end socket with jacking mechanism；Two ends point on rear side of the lathe bed
Two heel posts are not provided with, and two heel post upper horizontals are provided with roller on horizontal guide rail, the horizontal guide rail
It is equipped with two sets of automatic welding mechanisms；The anterior of the lathe bed sets roller on material rack platform, the bin platform to be equipped with material containing
Multiple web member steel pipes are mounted with car, the material containing car, web member steel pipe is pushed to assembly station, the envelope of both sides by the material containing car
Plate crimps with web member steel pipe and is fixed as web member component；The front end of the material containing car is provided with jacking module, by jacking module
V-type frame lifting web member component；The web member component of jack-up is transported to welding post by the material containing car by root；The web member component
Held out against by jacking mechanism, rotating disk, which drives, to be rotated, while being welded and fixed by two sets of welding guns at two ends to weld zone as web member；
After the completion of welding, the jacking mechanism unclamps web member, and the saddle that rear portion of the web member along lathe bed is set, which is rolled, slides out to receipts
Expect area.
2. a kind of web member end socket double-face automatic welding device according to claim 1, it is characterised in that the automatic welder
Structure includes moving horizontally module, vertically moves module, swings module, connecting rod, universal erector and welding gun；It is described to move horizontally
Module packaged type is arranged on horizontal guide rail, it is described vertically move module and move up and down formula and be arranged at described move horizontally module
On；The swing module is vertically moved in module described in being arranged at, and connecting rod, the connecting rod are provided with the swing module
Lower end be fixedly installed on universal erector, the universal erector and be equipped with welding gun.
3. a kind of web member end socket double-face automatic welding device according to claim 1, it is characterised in that the automatic welder
Two ends synchronous to web member component two-sided carry out automatic welding of the structure respectively at welding post.
4. a kind of web member end socket double-face automatic welding device according to claim 1, it is characterised in that the automatic welding
It is provided with controller on device, the controller and power distribution cabinet, automatic welding mechanism, moves horizontally module, vertically moves module, pendulum
Dynamic model block, universal erector, welding gun, material containing car, jacking module, jacking mechanism, the connection of rotating disk electric signal；The controller
The weld job for automatically controlling web member steel pipe and end socket is processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702539.5A CN107262987B (en) | 2017-08-16 | 2017-08-16 | Double-sided automatic welding device for web member end socket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702539.5A CN107262987B (en) | 2017-08-16 | 2017-08-16 | Double-sided automatic welding device for web member end socket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107262987A true CN107262987A (en) | 2017-10-20 |
| CN107262987B CN107262987B (en) | 2024-04-30 |
Family
ID=60080156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710702539.5A Active CN107262987B (en) | 2017-08-16 | 2017-08-16 | Double-sided automatic welding device for web member end socket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107262987B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108127254A (en) * | 2017-12-07 | 2018-06-08 | 苏州迅镭激光科技有限公司 | A kind of pump housing automatic laser welding equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108127254A (en) * | 2017-12-07 | 2018-06-08 | 苏州迅镭激光科技有限公司 | A kind of pump housing automatic laser welding equipment |
| CN115194357A (en) * | 2022-09-16 | 2022-10-18 | 徐州智博机车有限公司 | Two-way welding device for motorcycle exhaust pipe |
| CN115194357B (en) * | 2022-09-16 | 2022-11-29 | 徐州智博机车有限公司 | Two-way welding device for motorcycle exhaust pipe |
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| CN107262987B (en) | 2024-04-30 |
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