CN112548435B - Clamp for laser welding of fuel cell bipolar plate - Google Patents
Clamp for laser welding of fuel cell bipolar plate Download PDFInfo
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- CN112548435B CN112548435B CN202011288692.6A CN202011288692A CN112548435B CN 112548435 B CN112548435 B CN 112548435B CN 202011288692 A CN202011288692 A CN 202011288692A CN 112548435 B CN112548435 B CN 112548435B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to a clamp for laser welding of a bipolar plate of a fuel cell, belonging to the technical field of fuel cells. The clamp comprises a first pressing plate, a second pressing plate, a profiling plate and a driving device, wherein the first pressing plate can be penetrated by laser; the second pressing plate and the first pressing plate are arranged at intervals, and one side of the second pressing plate close to the first pressing plate is used for fixing the bipolar plate; the profiling plate is fixed on one side of the first pressing plate, which is close to the second pressing plate, and is provided with a laser avoiding groove for laser to pass through and a smoke channel communicated with the laser avoiding groove; the driving device drives the first pressing plate and/or the second pressing plate to move oppositely and clamp and fix the bipolar plate. After the clamp is used for fixing the bipolar plate, a laser beam of the laser welding equipment can penetrate through the first pressing plate and the laser avoiding groove to reach the bipolar plate, and one-time clamping welding of the bipolar plate is realized. Simultaneously, the smoke and dust that will weld the production through the smoke and dust passageway is avoided the groove from discharging from laser, prevents that the smoke and dust from influencing the penetrability of laser and influencing the welding effect of laser.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a clamp for laser welding of a bipolar plate of a fuel cell.
Background
The bipolar plate is an important component of the hydrogen fuel cell and plays roles in gas distribution, water heat management, current collection and galvanic pile support. The common material of the bipolar plate at present is 316L stainless steel, the thickness is 0.07-0.1 mm, usually first the raw materials are punched into the negative plate and the positive plate with the fine flow channel, then two unipolar plates are connected together, form the structure of "two-plate three-field". Compared with other connection technologies, laser welding has the advantages of simple process, high speed, good sealing performance, high joint quality, easiness in realizing automation and the like, and is a common connection process in batch production of metal bipolar plates.
In order to effectively isolate a hydrogen field, an oxygen field and a cooling field, a welding path arranged on the bipolar plate is closed, so that at least two cover plates with laser avoiding grooves are generally used in the traditional welding process, and the welding of the closed welding path can be realized only by clamping for at least two times.
At present, under the condition of ensuring one-time clamping, most of clamps adopt a mode of matching a plurality of times of turning/translating a fixed plate and a plurality of times of cutting/recovering a magnetic adsorption function, and a cover plate with a laser avoiding groove is integrally fixed to realize the welding of the bipolar plate. However, this method makes the welding process complicated, causing a problem of slow tact.
Disclosure of Invention
In view of the above, the present invention is directed to overcome the deficiencies of the prior art, and provides a fixture for laser welding of a fuel cell bipolar plate, so as to solve the technical problem of complicated welding process in the prior art.
The invention is realized by the following technical scheme:
a clamp for laser welding of a fuel cell bipolar plate,
a first platen through which laser light can pass;
the second pressing plate and the first pressing plate are arranged at intervals, and one side of the second pressing plate, which is close to the first pressing plate, is used for fixing the bipolar plate;
the profiling plate is fixed on one side, close to the second pressing plate, of the first pressing plate, a laser avoiding groove for laser to pass through and a smoke channel communicated with the laser avoiding groove are formed in the profiling plate, and the smoke channel is used for discharging smoke generated by welding from the laser avoiding groove;
and the driving device drives the first pressing plate and/or the second pressing plate to move oppositely and clamps and fixes the bipolar plate between the profile plate and the second pressing plate.
Optionally, in order to better implement the present invention, the profiling plate includes a plurality of profiling modules, the profiling modules are respectively fixed on the first pressing plate, and gaps between the profiling modules and/or gaps provided on the profiling modules form the laser avoiding groove.
Optionally, in order to better implement the invention, the smoke channel comprises an air inlet channel and a smoke exhaust channel, and an air inlet end of the air inlet channel is connected with an air source.
Optionally, in order to better implement the present invention, the smoke channel is a groove-shaped channel arranged on the surface of the profiling plate or a hole-shaped channel arranged inside the profiling plate.
Optionally, in order to better implement the present invention, a positioning device is further included, and the positioning device connects the profile plate, the bipolar plate and the second pressing plate.
Optionally, in order to better implement the present invention, the positioning device includes a positioning pin, a first positioning hole, and a second positioning hole, the former plate is located above the second pressing plate, the first positioning hole is disposed on the bipolar plate, the positioning pin is disposed on the second pressing plate, the second positioning hole is disposed on the former plate, and the positioning pin passes through the first positioning hole and then is inserted into the second positioning hole.
Optionally, in order to better implement the present invention, a first protrusion is disposed on the profile plate, the first protrusion is located at an edge of the profile plate where the laser avoiding groove is located, and a second protrusion corresponding to the first protrusion is disposed on the second pressing plate.
Optionally, in order to better implement the present invention, the material of the profile plate is a material that can transmit laser light.
Optionally, in order to better implement the present invention, the first pressing plate and the profile plate are made of transparent quartz glass or sapphire glass.
Optionally, in order to better implement the present invention, the pressing device further includes a bottom plate and a supporting member, the first pressing plate is fixed on the bottom plate through the supporting member, and the second pressing plate is fixed on the bottom plate through the driving device.
Compared with the prior art, the invention has the following beneficial effects:
the first pressing plate is made of a material which can penetrate through laser, so that laser beams of laser welding equipment can penetrate through the first pressing plate and then pass through the laser avoiding grooves of the profile plates to reach the bipolar plate, and one-time clamping laser welding of the bipolar plate is realized. In addition, the fixed plate does not need to be turned over/translated for multiple times and the magnetic adsorption function does not need to be cut off/recovered for multiple times in the welding process, the welding process is simplified, and the production rhythm is improved. Simultaneously, set up the smoke and dust passageway on the profiling plate to avoid the groove discharge from laser with the smoke and dust that produces among the welding process, prevent that the smoke and dust from influencing the penetrability of laser and influencing the welding effect of laser.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a bipolar plate;
FIG. 3 is a schematic view of the construction of the second platen;
FIG. 4 is a schematic view of the lower surface of the profile plate;
FIG. 5 is a sectional view A-A of FIG. 1 in the clamped position;
FIG. 6 is a perspective view of the profile plate;
FIG. 7 is a schematic illustration of the position of a collimated laser weld;
FIG. 8 is a schematic illustration of the position of a close-up galvanometer laser weld;
FIG. 9 is a schematic illustration of the position of a remote galvanometer laser weld.
In the figure: 1-a first platen; 2-a second press plate; 21-a positioning pin; 22-a second protrusion; 3-a profiling plate; 31-laser avoidance slots; 32-edge profile plate; 33-a central profile plate; 34-a hydrogen port former plate; 35-oxygen port profile plate; 36-a first projection; 37-an intake passage; 38-smoke evacuation channels; 39-second positioning hole; 4-a drive device; 5-a bottom plate; 6-a support member; 7-a bipolar plate; 71-a first locating hole; 8-laser.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1:
as shown in fig. 1, a jig for laser welding of a fuel cell bipolar plate 7 includes a first pressing plate 1, a second pressing plate 2, a profile plate 3, a driving device 4, a base plate 5, and a support 6, wherein,
the first pressing plate 1 and the second pressing plate 2 are both straight plates. The first press plate 1 is made of a material that can penetrate the laser light 8, such as transparent quartz glass, transparent sapphire glass material, or the like. The second pressing plate 2, the profiling plates 3, the bottom plate 5 and the support piece 6 are made of metal pieces such as steel or aluminum alloy. The first pressing plate 1 is horizontally fixed on the bottom plate 5 through a supporting piece 6, the second pressing plate 2 is horizontally fixed on the bottom plate 5 through a driving device 4, the first pressing plate 1 is located right above the second pressing plate 2, and the first pressing plate 1 and the second pressing plate 2 are arranged at intervals. The bipolar plate 7 to be welded is fixedly installed on one side of the second pressing plate 2 close to the first pressing plate 1.
The bipolar plate 7 to be welded is formed by two unipolar plates stacked together, and the bipolar plate 7 is formed after welding the two unipolar plates.
As shown in fig. 4, the profiling plate 3 includes a plurality of profiling modules, the profiling modules are fixed to one side of the first pressing plate 1 close to the second pressing plate 2 through bolt fasteners, gaps are formed between the profiling modules at intervals and/or on the profiling module body, the gaps and/or gaps jointly form a laser avoiding groove 31 of the laser 8, the laser avoiding groove 31 corresponds to a welding path on the bipolar plate 7, and the welding path refers to a path formed at a position on the bipolar plate 7 where welding is required through the laser 8. It should be noted that the number of profiling modules and the shape of each profiling module are arranged according to the welding path on the bipolar plate 7 and the bipolar plate 7, in this embodiment, the welding path on the bipolar plate 7 is shown by a dotted line in fig. 2, and has a plurality of closed annular welding paths, therefore, the profiling module comprises an edge profiling plate 32, a central profiling plate 33, two hydrogen port profiling plates 34 and two oxygen port profiling plates 35, the middle part of the edge profiling plate 32 has a through groove, the central profiling plate 33 is located in the through groove, four corners of the central profiling plate 33 are provided with notches, and the hydrogen port profiling plates 34 and the oxygen port profiling plates 35 are respectively located at four corners of the central profiling plate 33. Meanwhile, the laser avoiding groove 31 is formed through the gaps among the plurality of profiling modules, so that the two side areas of the welding line path can be compressed through the profiling modules, and the phenomenon of insufficient soldering in the welding process is reduced or even avoided.
The driving device 4 is a telescopic cylinder or a telescopic oil cylinder or an electric push rod, and the driving device 4 can drive the second pressing plate 2 to be close to the first pressing plate 1 or to be far away from the first pressing plate 1. Thereby achieving the fixation of the bipolar plate 7 between the former plate 3 and the second pressure plate 2.
According to the invention, the first pressing plate 1 is made of a material which can penetrate through the laser 8, so that the laser 8 beam of the laser 8 welding equipment can penetrate through the first pressing plate 1 and then passes through the laser avoiding groove 31 of the profile plate 3 to reach the bipolar plate 7, and one-time clamping laser welding of the bipolar plate is realized. In addition, the fixed plate does not need to be turned over/translated for multiple times and the magnetic adsorption function does not need to be cut off/recovered for multiple times in the welding process, the welding process is simplified, and the production rhythm is improved.
In the specific implementation, it is also possible to connect the first pressure plate 1 to the base plate 5 by means of the drive 4 and to fix the second pressure plate 2 to the base plate 5 by means of the support 6, so that the bipolar plate 7 can also be pressed by the movement of the first pressure plate 1 driven by the drive 4. Of course, the first pressing plate 1 and the second pressing plate 2 can be connected to the driving device 4 respectively, and the first pressing plate 1 and the second pressing plate 2 are driven by the driving device 4 to move towards each other simultaneously to realize the compression of the bipolar plate 7.
In addition, a large amount of fumes and dust may be generated during the laser welding process, remain in the laser avoiding groove 31 and a portion of the dust may adhere to the first pressing plate 1, which may affect the penetration of the laser 8, thereby affecting the welding effect of the laser 8 on the bipolar plate 7. To this, still be equipped with the smoke and dust passageway on the profiling plate 3 in this embodiment, the groove 31 is dodged to the one end intercommunication laser of smoke and dust passageway, and the other end communicates with the external world to can avoid discharging in the groove 31 from laser through the smoke and dust passageway with the smoke and dust that the welding produced, prevent that the smoke and dust from influencing the penetrability of laser and influencing the welding effect of laser. In this embodiment, the end of the smoke channel communicating with the outside is provided on the outer side wall of the cam 3. The smoke channel can be a hole-type channel formed by through holes arranged in the profiling plate, and can also be a groove-type channel formed by grooves arranged on the surface of the profiling plate.
As shown in fig. 6, the smoke channel includes an air inlet channel 37 and an air outlet channel 38, one end of each of the air inlet channel 37 and the air outlet channel 38 is communicated with the outer side wall of the profile plate 3, the other end is communicated with the side wall of the laser avoiding groove 31 formed on the profile plate 3, the external air source is connected with the air inlet end of the air inlet channel 37, so that the air blowing of the laser avoiding groove 31 is realized, the air flow process can drive the laser avoiding groove 31 to generate smoke and dust during welding, so that the smoke and dust attached to the first presser plate 1 and the smoke and dust suspended in the laser escape grooves 31 enter the air outlet passage 38, are discharged to the outside through the air outlet passage 38, thereby further reduce the condition that the smoke and dust is attached to on first clamp plate 1 and the smoke and dust of suspension in the groove 31 is dodged to the laser, has avoided the permeability that the smoke and dust influences laser 8, has improved laser welding's effect. In the embodiment, the air source adopts a blower, and the emission effect of the smoke and the dust is ensured by adjusting the blowing pressure of the blower. Of course, the air source may also use an air compressor. In addition, an air exhaust device can be arranged at the air outlet end of the air outlet channel 38, and the exhaust of the flue gas and the dust is accelerated in an air exhaust mode. The inlet end of inlet channel 37 is referred to herein as the end of inlet channel 37 that connects to the outside wall of profile plate 3, and the outlet end of outlet channel 38 is the end of outlet channel 38 that connects to the outside wall of profile plate 3.
As shown in fig. 1, 2, 3 and 6, the profile plate 3 and the second pressing plate 2 and the bipolar plate 7 are precisely positioned by a positioning device, which in this embodiment includes a first positioning hole 71, a second positioning hole 39 and a positioning pin 21. The bipolar plate 7 is provided with a first positioning hole 71 in advance, the second pressing plate 2 is provided with a positioning pin 21 matched with the position of the first positioning hole 71 on the bipolar plate 7, and the profiling plate 3 is provided with a second positioning hole 39 matched with the position of the positioning pin 21. After the bipolar plate 7 is installed on the second pressing plate 2 through the matching of the first positioning hole 71 and the positioning pin 21, the positioning pin 21 is inserted into and matched with the second positioning hole 39, and the profiling plate 3 is fixedly connected with the first pressing plate 1, so that the profiling plate 3, the bipolar plate 7 and the second pressing plate 2 are accurately fixed together. Of course, the second positioning hole 39 may be disposed on the first pressing plate 1, and the relative positions of the profile plate 3, the second pressing plate 2 and the bipolar plate 7 can be fixed by fixing the relative positions of the first pressing plate 1, the second pressing plate 2 and the bipolar plate 7. The positioning device may also be a baffle positioning device, for example, a plurality of first baffles arranged on the second pressing plate 2 are used to realize the multi-directional limiting of the bipolar plate 7, so as to realize the positioning between the second pressing plate 2 and the bipolar plate 7, and a plurality of second baffles arranged on the first pressing plate 1 are used to realize the positioning of the first baffles, so as to realize the positioning between the first pressing plate 1 and the second pressing plate 2.
As shown in fig. 5, a first protrusion 36 is disposed on the profile plate 3, the first protrusion 36 is disposed at one end of the profile plate 3 close to the bipolar plate 7, and the first protrusion 36 is located at an edge of the profile module, after the first protrusion 36 is disposed, when the bipolar plate 7 is pressed, the bipolar plate 7 is actually pressed between the first protrusion 36 of the profile plate 3 and the second pressing plate 2, so that both sides of a welding seam path of the bipolar plate 7 can be locally pressed, the pressing effect and the welding effect of the bipolar plate 7 are improved, and the occurrence of a cold joint phenomenon is further reduced. Meanwhile, the second pressing plate 2 is also provided with a second bulge 22 corresponding to the first bulge 36, and the second bulge 22 and the first bulge 36 are mutually matched to realize the compression of the bipolar plate 7, so that the compression effect and the welding effect of the bipolar plate 7 are further improved.
The use method of the clamp comprises the following steps:
the method comprises the following steps: obtaining a bipolar plate 7 to be welded, manufacturing a corresponding profile plate 3 according to a welding seam path required to be welded on the bipolar plate 7, and fixing a profile module in the profile plate 3 on a first pressing plate 1 through a bolt fastener;
step two: the bipolar plate 7 is arranged on the second pressing plate 2 through the matching of the positioning pins 21 and the first positioning holes 71;
step three: the driving device 4 is driven to enable the second pressing plate 2 to move towards the first pressing plate 1, the positioning of the profile plate 3 and the bipolar plate 7 is realized through the matching of the positioning pin 21 and the second positioning hole 39, and the bipolar plate 7 is clamped and fixed through the profile plate 3 and the second pressing plate 2, so that the welding seam path areas of the two unipolar plates are tightly attached without gaps;
step four: starting laser welding equipment to enable laser 8 generated by the equipment to penetrate through the first pressing plate 1, penetrate through the laser avoiding groove 31 in the profile plate 3 and then irradiate on the bipolar plate 7, so that two compressed unipolar plates in the bipolar plate 7 are welded together under the action of the laser 8;
step five: after the welding is finished, the driving device 4 drives the second pressing plate 2 to move towards the direction far away from the first pressing plate 1, and finally the welded bipolar plate 7 is taken out.
The fixture of the embodiment is suitable for collimation type laser welding and close-range galvanometer type laser welding. As shown in fig. 7, the collimated welding head moves along the welding path, the laser 8 exit path being perpendicular to the bipolar plates 7 to be welded. As shown in fig. 8, during short-distance galvanometer laser welding, an included angle between the exit path of the laser 8 and the bipolar plate 7 is large, and the profile plate 3 with a certain thickness does not block the exit path of the laser 8, so that laser welding can be realized.
Example 2:
this embodiment is another implementation of embodiment 1, in which the profile plate 3 is made of a material through which the laser light 8 can pass, such as a transparent quartz glass or a transparent sapphire glass material. The rest of the structure of this embodiment is the same as embodiment 1.
As shown in fig. 9, when using the remote galvanometer laser welding, the included angle between the path of the laser 8 and the bipolar plate 7 is small, and the laser 8 must pass through the profile plate 3 to irradiate on the surface of the bipolar plate 7, so that the material of the profile plate 3 is set to be the material through which the laser 8 can pass, the remote galvanometer laser welding can be realized, and the welding quality of the remote area can be ensured. When the breadth of the bipolar plate 7 is large, the emitting end of the laser 8 does not need to be moved greatly, and only the emitting angle of the laser 8 needs to be adjusted, so that the welding speed is obviously improved, and the fluctuation of the scanning speed does not exist at the corner of a welding path, and the welding quality is favorably improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A clamp for laser welding of a fuel cell bipolar plate is characterized in that,
the laser beam welding device comprises a first pressing plate, a second pressing plate and a welding head, wherein the first pressing plate is a straight plate and can be penetrated by laser;
the second pressing plate is a straight plate, the second pressing plate and the first pressing plate are arranged at intervals, and one side of the second pressing plate, which is close to the first pressing plate, is used for fixing the bipolar plate;
the profiling plate is fixed on one side, close to the second pressing plate, of the first pressing plate, a laser avoiding groove for laser to pass through and a smoke channel communicated with the laser avoiding groove are formed in the profiling plate, and the smoke channel is used for discharging smoke generated by welding from the laser avoiding groove; the profiling plate comprises a plurality of profiling modules, the profiling modules are respectively fixed on the first pressing plate, and gaps among the profiling modules and/or gaps arranged on the profiling modules form the laser avoiding groove;
and the driving device drives the first pressing plate and/or the second pressing plate to move oppositely and clamps and fixes the bipolar plate between the profile plate and the second pressing plate.
2. The clamp for the laser welding of the fuel cell bipolar plate as claimed in claim 1, wherein the smoke channel comprises an air inlet channel and a smoke outlet channel, and an air source is connected to an air inlet end of the air inlet channel.
3. The fixture for laser welding of a fuel cell bipolar plate as claimed in claim 2, wherein the smoke channel is a grooved channel formed on the surface of the profile plate or a grooved channel formed inside the profile plate.
4. The fixture for laser welding of a fuel cell bipolar plate according to claim 1, further comprising a positioning device connecting the former plate, the bipolar plate, and the second pressing plate.
5. The clamp for laser welding of a fuel cell bipolar plate as claimed in claim 4, wherein the positioning device comprises a positioning pin, a first positioning hole and a second positioning hole, the former is located above the second pressing plate, the first positioning hole is located on the bipolar plate, the positioning pin is located on the second pressing plate, the second positioning hole is located on the former, and the positioning pin passes through the first positioning hole and then is inserted into the second positioning hole.
6. The clamp for laser welding of the fuel cell bipolar plate as claimed in claim 1, wherein a first protrusion is formed on the profile plate, the first protrusion is located at an edge of the profile plate where the laser avoiding groove is located, and a second protrusion corresponding to the first protrusion is formed on the second pressing plate.
7. The fixture for laser welding of a fuel cell bipolar plate as claimed in claim 1, wherein the former plate is made of a material that is transparent to laser.
8. The fixture for laser welding of a fuel cell bipolar plate according to claim 7, wherein the first pressing plate and the profile plate are transparent quartz glass or sapphire glass.
9. The jig for laser welding of a fuel cell bipolar plate according to any one of claims 1 to 8, further comprising a base plate and a support member, wherein the first pressing plate is fixed to the base plate by the support member, and the second pressing plate is fixed to the base plate by the driving means.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011288692.6A CN112548435B (en) | 2020-11-17 | 2020-11-17 | Clamp for laser welding of fuel cell bipolar plate |
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| CN202011288692.6A CN112548435B (en) | 2020-11-17 | 2020-11-17 | Clamp for laser welding of fuel cell bipolar plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114178722A (en) * | 2021-12-06 | 2022-03-15 | 河北光兴半导体技术有限公司 | Bipolar plate welding fixture, laser welding device and bipolar plate welding method |
| CN114260638B (en) * | 2021-12-22 | 2023-12-15 | 苏州东风精冲工程有限公司 | Hydrogen fuel cell bipolar plate rotary welding compacting device |
| CN114682909B (en) * | 2022-05-13 | 2022-09-09 | 北京开元新能科技有限公司 | Bipolar plate welding set |
| CN114952046A (en) * | 2022-05-31 | 2022-08-30 | 安徽明天氢能科技股份有限公司 | Simple welding tool for metal bipolar plate |
| DE102022132731A1 (en) * | 2022-12-08 | 2024-06-13 | Schaeffler Technologies AG & Co. KG | Device for welding two embossed half sheets, process and bipolar plate |
| CN116944758B (en) * | 2023-09-20 | 2023-12-22 | 广州市方连科技有限公司 | Welding equipment for preventing welding deformation of metal parts |
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| CN102189684B (en) * | 2011-04-29 | 2013-03-20 | 广州市光机电技术研究院 | Device and method for welding plastic materials in laser transmission manner |
| CN103878524B (en) * | 2014-03-28 | 2016-02-10 | 上海交通大学 | A kind of ultra-thin metal bipolar plate multistage clamping self adaptation fixture for laser welding |
| CN205310809U (en) * | 2015-12-08 | 2016-06-15 | 特变电工沈阳变压器集团有限公司 | Zinc bromine redox flow battery laser welding anchor clamps |
| WO2018218607A1 (en) * | 2017-06-01 | 2018-12-06 | 大族激光科技产业集团股份有限公司 | Laser welding device and welding method therefor |
| CN109382584B (en) * | 2017-08-04 | 2020-09-11 | 大族激光科技产业集团股份有限公司 | Laser welding system and method for battery cover plate |
| CN110556507A (en) * | 2018-05-31 | 2019-12-10 | 宁德时代新能源科技股份有限公司 | Pole piece processing device |
| CN110534764A (en) * | 2019-08-07 | 2019-12-03 | 浙江锋源氢能科技有限公司 | Fuel battery metal double polar plate welding fixture |
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