CN108465934A - A kind of bipolar plates welder and welding method - Google Patents

A kind of bipolar plates welder and welding method Download PDF

Info

Publication number
CN108465934A
CN108465934A CN201810157963.0A CN201810157963A CN108465934A CN 108465934 A CN108465934 A CN 108465934A CN 201810157963 A CN201810157963 A CN 201810157963A CN 108465934 A CN108465934 A CN 108465934A
Authority
CN
China
Prior art keywords
welding
point
bipolar plates
predeterminated
standard track
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
Application number
CN201810157963.0A
Other languages
Chinese (zh)
Inventor
宋旺宝
辛猛
龙传德
牛增强
韩金龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UNITED WINNERS LASER CO Ltd
Original Assignee
UNITED WINNERS LASER CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by UNITED WINNERS LASER CO Ltd filed Critical UNITED WINNERS LASER CO Ltd
Priority to CN201810157963.0A priority Critical patent/CN108465934A/en
Publication of CN108465934A publication Critical patent/CN108465934A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20Bonding
    • B23K26/21Bonding by welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08Devices involving relative movement between laser beam and workpiece
    • B23K26/0869Devices involving movement of the laser head in at least one axial direction
    • B23K26/0876Devices involving movement of the laser head in at least one axial direction in at least two axial directions
    • B23K26/0884Devices involving movement of the laser head in at least one axial direction in at least two axial directions in at least in three axial directions, e.g. manipulators, robots
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70Auxiliary operations or equipment
    • B23K26/702Auxiliary equipment

Abstract

The invention discloses a kind of bipolar plates welder and methods, and this method comprises the following steps:On the table by welding product fixed placement;Input unit inputs non-standard track of the workpiece to be welded in preset conventional coordinates;The non-standard track of display unit real-time display input and current welded condition;Control unit receives non-standard track and the control instruction for executing non-standard track is sent to weld assembly;Weld assembly obtains and exports the coordinate of the first predeterminated position point of bipolar plates and the coordinate of the second predeterminated position point, control unit obtain non-standard track according to the coordinate of the first predeterminated position point and the coordinate of the second predeterminated position point;Control unit obtains the running orbit of welding product according to non-standard track and sends out corresponding control instruction to drive weld assembly to be welded.The welding method can calculate the amount of movement relative to non-standard track shifting axle, and then the running orbit of the acquisition welding product of fast accurate automatically, efficient, easy to operate.

Description

A kind of bipolar plates welder and welding method
【Technical field】
The present invention relates to technical field of laser welding, more particularly to a kind of bipolar plates welder and welding method.
【Background technology】
Fuel cell (FC) is a kind of power generator of electrochemistry, it according to electrochemical principle, will isothermally be stored in fuel and Chemical energy in oxidant is converted into electric energy.Have the characteristics that energy conversion efficiency and reliability are high.Proton exchange membrane is fired Expect battery (PEMFC) in addition to having the advantages that fuel cell, while also have electroless liquid stream mistakes, long lifespan, specific power and Equal prominent feature higher than energy.Therefore, especially suitable for providing electric energy for portable power supplies and electric vehicle.Bipolar plates are protons One multifunctional module of exchange film fuel battery, basic role are to provide reactant to fuel cell electrode and are battery pile Interior adjacent cell provides electrical connection, while product water and reaction heat being discharged out of battery.
Existing fuel battery metal double polar plate passes through gluing, the preparation method of resistance spot welding or production work by two pieces of unipolar plates Skill is made, and hydrogen-oxygen chemical property is unstable, and service life is shorter.
In addition, in the manufacturing process of bipolar plates, mostly bipolar plates are welded using automatic welding device, it is most of Automatic welding device use to each welding product carry out offset and rotation angle teaching track method, obtain Welder The step of running orbit of part, is relatively complicated, less efficient, and lacks and change to the welding track parameter occurred in welding process Become the adaptive ability with the uncertain shaking occurred in welding process.
【Invention content】
In conclusion the main purpose of the present invention is unstable in order to solve existing metal double polar plates hydrogen-oxygen chemical property, Service life is shorter, and the running orbit operation of acquisition welding product is relatively complicated in the manufacturing process of bipolar plates, compared with rate It is relatively low, and lack to the uncertain shaking that occurs in the welding track parameter change and welding process that occur in welding process The technical problems such as adaptive ability, and a kind of bipolar plates welder and welding method are provided.
In order to solve the above technical problem, the present invention provides a kind of bipolar plates welder, described device includes:Work Platform, and the input unit that is separately positioned on the workbench, display unit, control unit and weld assembly, the control Unit controls with input unit, display unit and weld assembly connect respectively.
The weld assembly includes a pair of of the module bracket being arranged on the workbench, is divided in each module bracket Not She You a Y-axis translate module, the movable end of each Y-axis translation module is respectively equipped with coordinates the X-axis of sliding to translate with it The movable end of module, the X-axis translation module is connected with module connecting plate, and Z axis module, institute are equipped on the module connecting plate State Z axis module slide be equipped with its integrally formed outgoing head lifter plate, it is described outgoing head lifter plate another side on divide It is not installed with laser emitting head and air blowing mounting bracket, Smoking pipe, the Smoking pipe and outside are installed on the air blowing mounting bracket Smoke purifier is connected.
The spacing between coaxial gas nozzle and welding product on the laser emitting head is 5mm.
The laser emitting head under a shielding gas carries out bipolar plates by the welding manner of positive out of focus and long pulse high Speed welding.
The bipolar plates are welded to each other by hydrogen pole plate and oxygen pole plate.
The speed of welding of the laser emitting head is 150mm/s, power 107w.
Further, it would be desirable to provide a kind of welding method welded based on the bipolar plates welder, this method includes as follows Step:
On the table by welding product fixed placement;
Input unit inputs non-standard track of the workpiece to be welded in preset conventional coordinates;
The non-standard track of display unit real-time display input and current welded condition;
Control unit receives non-standard track and the control instruction for executing non-standard track is sent to weld assembly;
Weld assembly obtains and exports the coordinate information and the second predeterminated position point of the first predeterminated position point of the bipolar plates Coordinate information,
Control unit obtains non-according to the coordinate information of the first predeterminated position point and the coordinate information of the second predeterminated position point Standard trajectory;
Control unit obtains the running orbit of the welding product according to the non-standard track and sends out corresponding control instruction To drive the weld assembly to be welded;
The non-standard track is using the coordinate information of arbitrary point on welding product as origin, and by P1, P2 ... constructed by Pn Weld pattern on welding product.
The P1 is welding starting point, and P2 is the second pad, and Pn is welding end point.
The first predeterminated position point corresponds to the origin of the conventional coordinates in bipolar plates, the second predeterminated position point Corresponding to any point in the conventional coordinates.
Using above-mentioned technical proposal, compared with prior art, advantageous effect is caused by the present invention:The present invention's is double The laser emitting head of the welder of pole plate is integrated in one with translation module to reduce the outgoing head light beam wave caused by vibrations It is dynamic;X, Y, Z high speed and precision shifting axle use the high-accuracy lead screw of small helical pitch, so that shifting axle is had positioning accuracy height, are running at high speed When without vibration, further reduce outgoing head light beam fluctuation caused by vibration;Coaxial blow is set as with welding product distance 5mm, so that outgoing head is welded during high-speed welding, spot is tiny, position is accurate.In addition, the welding method energy of the bipolar plates of the present invention Enough amount of movements calculated automatically relative to non-standard track shifting axle, and then the operation rail of the acquisition welding product of fast accurate Mark eliminates tradition and is required for carrying out the time of offset and rotation angle teaching track to each welding workpiece, efficient, behaviour Make easy.
【Description of the drawings】
Fig. 1 is the flow chart of bipolar plates welding of the present invention;
Fig. 2 is the overall structure diagram of the bipolar plates welder of the present invention;
Fig. 3 is the structural schematic diagram of the weld assembly of the present invention;
Fig. 4 is non-standard track of the present invention in standard coordinate system.
【Specific implementation mode】
The following example is being explained further and supplementing to the present invention, and any restrictions will not be constituted to the present invention.
As shown in Fig. 2, the bipolar plates welder of the present invention includes:Workbench 1, input unit 2, display unit 3, control Unit 4, weld assembly 5 and smoke purifier(It is not shown in figure).The input unit 2, display unit 3, control unit 4 and weldering Connected components 5 are respectively set on the table, and described control unit 4 respectively with input unit 2, display unit 3, weld assembly 5 And smoke purifier control connection, in the present embodiment, the input unit is keyboard and mouse, and the display unit is display Screen, described control unit are the laser welding host of model QCW.
Such as Fig. 2, shown in Fig. 3, specifically, the weld assembly 5 includes a pair of of the module branch being arranged on the workbench 1 Frame 51 is each respectively equipped with Y-axis translation module 52, the activity of each Y-axis translation module 52 in the module bracket 51 End is respectively equipped with coordinates the X-axis of sliding to translate module 53 with it, and the movable end of the X-axis translation module 53 is connected with module connection Plate 54 is equipped with Z axis module 55 on the module connecting plate 54, and the slide 56 of the Z axis module is equipped with to be integrally formed with it Outgoing head lifter plate 57, in the present embodiment, by the way that the slide 56 of Z axis module and outgoing head lifter plate 57 are integrated in one Body, so as to effectively reduce the outgoing head light beam fluctuation caused by vibrations, so that tiny, position precisely provides guarantor for weldering spot Barrier.As shown in Fig. 2, being installed with laser emitting head 58 and air blowing mounting bracket respectively on the another side of the outgoing head lifter plate 57 59, Smoking pipe 510 is installed, the Smoking pipe is connected with external smoke purifier, in this implementation on the air blowing mounting bracket In example, dust caused by laser welding and smog can be absorbed out outdoor by the smoke purifier, to make room air The more health of cleaning and effective guarantee operating personnel.
As further in the present embodiment, the coaxial gas nozzle 681 on the laser emitting head 58 is produced with welding by Fig. 2 Spacing between product 511 is 5mm, and to further make outgoing head be welded during high-speed welding, spot is tiny, position is accurate.
In the present embodiment, the laser emitting head 58 passes through positive out of focus and the welding manner of long pulse under a shielding gas High-speed welding is carried out to bipolar plates.Further, the speed of welding of the laser emitting head is 150mm/s, power 107w. Closely coaxial nitrogen flushing gas shielded light beam can shuttle welding in the tiny seal groove of pole plate.
In the present embodiment, the bipolar plates are welded to each other by hydrogen pole plate and oxygen pole plate, specifically, the hydrogen pole plate With oxygen pole plate by a holder it is back-to-back welding form bipolar plates, the back side on two boards respectively with seal groove totality similar shape Holder mutually abuts, and bipolar plates is made to form three sealing cavities:The upper plenum of hydrogen is led, the hollow cavity of cooling fluid is led and leads sky The lower cavity leakage-proof of gas.Bipolar plates its hydrogen-oxygen stable electrochemical property being assembled by kind of mode, greatly increases Service life.
As shown in Figure 1, the present invention also provides a kind of welding method welded based on the bipolar plates welder, it should Method includes the following steps:
Step S110:On the table by welding product fixed placement;
Step S120:Input unit inputs non-standard track of the workpiece to be welded in preset conventional coordinates;
Step S130:The non-standard track of display unit real-time display input and current welded condition;
Step S140:Control unit receives non-standard track and the control instruction for executing non-standard track is sent to welding group Part;
Step S150:Weld assembly obtains and exports the coordinate information and second of the first predeterminated position point of the bipolar plates in advance If the coordinate information of location point;
Step S160:Control unit is believed according to the coordinate information of the first predeterminated position point and the coordinate of the second predeterminated position point Breath obtains non-standard track;
Step S170:Control unit obtains the running orbit of the welding product according to the non-standard track and sends out corresponding Control instruction is to drive the weld assembly to be welded;
As shown in figure 4, being illustrated by taking fuel battery double plates as an example, the non-standard track is with arbitrary point on welding product The weld pattern being located on welding product that coordinate information is origin, and by P1, P2 ... constructed by Pn.
Further, the P1 is welding starting point, and P2 is the second pad, and Pn is welding end point.
The first predeterminated position point corresponds to the origin of the conventional coordinates in bipolar plates, in the present embodiment, welding Component obtains the coordinate information for the bipolar plates arbitrary origin being located on workbench, which is origin Coordinate information, be denoted as O (x1, y1).
The second predeterminated position point corresponds to any point in the conventional coordinates.In the present embodiment, second Predeterminated position point can correspond to any point (P9, P1, P10, P2 or other positions point) in conventional coordinates.In this implementation In example, the second predeterminated position point is to be denoted as P2 ' corresponding to P2 points in conventional coordinates.Correspondingly, welding driving mechanism can obtain In the coordinate information of the fuel battery double plates P2 ' on station, which is that the coordinate of the second predeterminated position point is believed for fetch bit Breath, is denoted as P2 ' (x2, y2).Driving mechanism is welded by the coordinate information O ' (x1, y1) of the first predeterminated position point of acquisition and the The coordinate information P2 ' (x2, y2) of 2 predeterminated position points is transmitted to control unit processing by system bus.
Although being disclosed to the present invention by above example, the scope of the invention is not limited to this, Under conditions of present inventive concept, above each component can with technical field personnel understand similar or equivalent element come It replaces.

Claims (10)

1. a kind of bipolar plates welder, which is characterized in that described device includes:Workbench, and it is separately positioned on the work Make the input unit on platform, display unit, control unit and weld assembly, described control unit respectively with input unit, display Unit and weld assembly control connection.
2. bipolar plates welder according to claim 1, which is characterized in that the weld assembly includes being arranged described A pair of of module bracket on workbench, is each respectively equipped with Y-axis translation module in the module bracket, each Y-axis is flat The movable end of shifting formwork group is respectively equipped with coordinates the X-axis of sliding to translate module with it, and the movable end of the X-axis translation module is connected with Module connecting plate is equipped with Z axis module on the module connecting plate, and the slide of the Z axis module is equipped with to be integrally formed with it Outgoing head lifter plate, it is described outgoing head lifter plate another side on be installed with laser emitting head and air blowing mounting bracket, institute respectively It states and Smoking pipe is installed on air blowing mounting bracket, the Smoking pipe is connected with external smoke purifier.
3. bipolar plates welder according to claim 2, which is characterized in that the coaxial gas nozzle on the laser emitting head Spacing between welding product is 5mm.
4. bipolar plates welder according to claim 3, which is characterized in that the laser emitting head is under a shielding gas High-speed welding is carried out to bipolar plates by the welding manner of positive out of focus and long pulse.
5. bipolar plates welder according to claim 4, which is characterized in that the bipolar plates are by a hydrogen pole plate and an oxygen Pole plate is welded to each other to be formed.
6. bipolar plates welder according to claim 3, which is characterized in that the speed of welding of the laser emitting head is 150mm/s, power 107w.
7. a kind of welding method welded based on bipolar plates welder described in claim 1, which is characterized in that the party Method includes the following steps:
On the table by welding product fixed placement;
Input unit inputs non-standard track of the workpiece to be welded in preset conventional coordinates;
The non-standard track of display unit real-time display input and current welded condition;
Control unit receives non-standard track and the control instruction for executing non-standard track is sent to weld assembly;
Weld assembly obtains and exports the coordinate information and the second predeterminated position point of the first predeterminated position point of the bipolar plates Coordinate information;
Control unit obtains non-according to the coordinate information of the first predeterminated position point and the coordinate information of the second predeterminated position point Standard trajectory;
Control unit obtains the running orbit of the welding product according to the non-standard track and sends out corresponding control instruction To drive the weld assembly to be welded.
8. welding method according to claim 7, which is characterized in that the non-standard track is with arbitrary point on welding product Coordinate information be the weld pattern that is located at welding product on of the origin and by P1, P2 ... constructed by Pn.
9. welding method according to claim 8, which is characterized in that the P1 is welding starting point, and P2 is the second welding Point, Pn are welding end point.
10. welding method according to claim 7, which is characterized in that the first predeterminated position point corresponds to bipolar plates On conventional coordinates origin, the second predeterminated position point correspond to the conventional coordinates in any point.
CN201810157963.0A 2018-02-25 2018-02-25 A kind of bipolar plates welder and welding method Pending CN108465934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810157963.0A CN108465934A (en) 2018-02-25 2018-02-25 A kind of bipolar plates welder and welding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810157963.0A CN108465934A (en) 2018-02-25 2018-02-25 A kind of bipolar plates welder and welding method

Publications (1)

Publication Number Publication Date
CN108465934A true CN108465934A (en) 2018-08-31

Family

ID=63264931

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810157963.0A Pending CN108465934A (en) 2018-02-25 2018-02-25 A kind of bipolar plates welder and welding method

Country Status (1)

Country Link
CN (1) CN108465934A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109623191A (en) * 2019-01-14 2019-04-16 安徽明天氢能科技股份有限公司 A kind of fuel battery double plates welding production technology
CN109877457A (en) * 2019-04-04 2019-06-14 武汉华工激光工程有限责任公司 A kind of seal weld method of the large format bipolar plates of fuel cell
CN109877452A (en) * 2019-03-13 2019-06-14 北京新研创能科技有限公司 A kind of welding method for fuel battery metal double polar plate
CN111805118A (en) * 2020-09-04 2020-10-23 爱德曼氢能源装备有限公司 Automatic positioning welding device for bipolar plate of fuel cell

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080108279A1 (en) * 2005-03-23 2008-05-08 Control Systems Technologies, Llc Control system and method for processing jewelry and the like
CN102886592A (en) * 2012-09-27 2013-01-23 清华大学 Hyperbolic trace directional tangent constant-speed welding robot device
CN102983338A (en) * 2012-12-03 2013-03-20 新源动力股份有限公司 Fuel cell bipolar metal plate with enhanced sealing property
CN103164164A (en) * 2013-04-10 2013-06-19 天津三星光电子有限公司 Display control method of touch terminal application program and touch terminal thereof
CN104795573A (en) * 2014-01-17 2015-07-22 上海神力科技有限公司 Metal bipolar plate for fuel cell
CN105033457A (en) * 2015-08-03 2015-11-11 东莞市德瑞精密设备有限公司 Battery module laser time-sharing welding machine
CN105965160A (en) * 2016-06-23 2016-09-28 深圳市联赢激光股份有限公司 Battery cover plate welding equipment
CN107175406A (en) * 2017-05-19 2017-09-19 大族激光科技产业集团股份有限公司 The control method and system of welding track
CN107297365A (en) * 2017-08-09 2017-10-27 温州职业技术学院 A kind of desk-top laser accurate cleaning device of dual wavelength composite energy profile
CN206952358U (en) * 2017-05-25 2018-02-02 大族激光科技产业集团股份有限公司 Air blowing component and laser welding head

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080108279A1 (en) * 2005-03-23 2008-05-08 Control Systems Technologies, Llc Control system and method for processing jewelry and the like
CN102886592A (en) * 2012-09-27 2013-01-23 清华大学 Hyperbolic trace directional tangent constant-speed welding robot device
CN102983338A (en) * 2012-12-03 2013-03-20 新源动力股份有限公司 Fuel cell bipolar metal plate with enhanced sealing property
CN103164164A (en) * 2013-04-10 2013-06-19 天津三星光电子有限公司 Display control method of touch terminal application program and touch terminal thereof
CN104795573A (en) * 2014-01-17 2015-07-22 上海神力科技有限公司 Metal bipolar plate for fuel cell
CN105033457A (en) * 2015-08-03 2015-11-11 东莞市德瑞精密设备有限公司 Battery module laser time-sharing welding machine
CN105965160A (en) * 2016-06-23 2016-09-28 深圳市联赢激光股份有限公司 Battery cover plate welding equipment
CN107175406A (en) * 2017-05-19 2017-09-19 大族激光科技产业集团股份有限公司 The control method and system of welding track
CN206952358U (en) * 2017-05-25 2018-02-02 大族激光科技产业集团股份有限公司 Air blowing component and laser welding head
CN107297365A (en) * 2017-08-09 2017-10-27 温州职业技术学院 A kind of desk-top laser accurate cleaning device of dual wavelength composite energy profile

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109623191A (en) * 2019-01-14 2019-04-16 安徽明天氢能科技股份有限公司 A kind of fuel battery double plates welding production technology
CN109877452A (en) * 2019-03-13 2019-06-14 北京新研创能科技有限公司 A kind of welding method for fuel battery metal double polar plate
CN109877452B (en) * 2019-03-13 2021-03-23 北京新研创能科技有限公司 Welding method for metal bipolar plate of fuel cell
CN109877457A (en) * 2019-04-04 2019-06-14 武汉华工激光工程有限责任公司 A kind of seal weld method of the large format bipolar plates of fuel cell
CN111805118A (en) * 2020-09-04 2020-10-23 爱德曼氢能源装备有限公司 Automatic positioning welding device for bipolar plate of fuel cell

Similar Documents

Publication Publication Date Title
CN105033998B (en) Intelligent flexible production line based on automatic robot assembling and operating method thereof
CN101456182B (en) Intelligent robot welding device using large-scale workpiece
CN203471145U (en) Laser processing device
CN103111767B (en) Control method and device of laser-arc hybrid welding
CN1212215C (en) Welding machine driven by fuel cell
CN203018259U (en) Inner pot surface spray painting robot
CN103611994B (en) Complex-curved list without recast layer/group hole Multi-station electrical spark-electrolytic machine tool
CN206382705U (en) A kind of laser-beam welding machine
CN105195868A (en) Robot welding system and welding method thereof
US20080296171A1 (en) Multi-cell dual voltage electrolysis apparatus and method of using same
CN202212700U (en) Wide-breadth light alloy plate welding device
CN102049638A (en) Circular seam welding robot device
CN201366596Y (en) Multi-axis linkage mechanism
CN202261650U (en) Monitoring system for heliostat field of tower-type solar power plant
CN202622192U (en) Autonomous mobile robot system for plasma metal-inert gas welding (MIG) hybrid welding
EP1593449A3 (en) Distributed arc electroerosion
CN104107973B (en) Identifying method and device for welding joints of corrugated plates of containers and welding control system
CN203390462U (en) Welding device for aluminum alloy automobile dashboard support
CN201309046Y (en) Battery electrical core automatic spot welding machine
CN202715940U (en) Welding device for main string pipe of pile leg of self-lifting device in oceanographic engineering
CN101474734A (en) Multi-axes synchronous mechanism
CN102581487B (en) Laser weld-bonding method of bipolar plate of fuel cell
CN102689100B (en) Autonomous mobile robot system for plasma metal-inert-gas (MIG) composite welding
CN103348040A (en) Method for reducing carbon dioxide
CN103639580B (en) A kind of semi-automatic spot welding machine

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination