CN115555718B

CN115555718B - Reduce stress deformation's metal bipolar plate laser welding device

Info

Publication number: CN115555718B
Application number: CN202211554934.0A
Authority: CN
Inventors: 傅煜; 朱永明
Original assignee: Seksun Technology Suzhou Co ltd
Current assignee: Seksun Technology Suzhou Co ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-04-04
Anticipated expiration: 2042-12-06
Also published as: CN115555718A

Abstract

The invention discloses a metal bipolar plate laser welding device capable of reducing stress deformation, which relates to the technical field of laser welding and comprises a base, wherein a sliding rail is arranged on the base, a shell is arranged on the sliding rail, a tray capable of being pushed and pulled is arranged in front of the shell, an opening is formed in the upper part of the shell, a pressure plate is rotatably arranged at the opening, a welding groove extending along the radial direction of the pressure plate is formed in the pressure plate, a mechanical arm is also erected on the base, and a laser is arranged in the mechanical arm; compared with the prior art, the invention is tightly attached to the bipolar plate and cools the bipolar plate in time during welding.

Description

Reduce stress deformation's metal bipolar plate laser welding device

Technical Field

The invention relates to the technical field of laser welding, in particular to a metal bipolar plate laser welding device capable of reducing stress deformation.

Background

Fuel cell technology is a promising approach for generating power within automobiles, each fuel cell consisting of hundreds of bipolar plates separating the membrane electrode assembly and forming cooling channels, the bipolar plates consisting of two metal plates welded together. In order to weld thin metal plates together without defects, it is necessary to focus a very small spot on a workpiece, which easily causes stress deformation of the metal plates due to uneven heating and untimely heat dissipation.

Therefore, it is necessary to provide a laser welding apparatus for metal bipolar plates with reduced stress deformation to solve the above problems in the background art.

Disclosure of Invention

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a reduce stress deformation's metal bipolar plate laser welding device, includes the base, be equipped with the slide rail on the base, be equipped with the casing on the slide rail, the place ahead of casing is equipped with the tray that can push and pull, the casing top is equipped with the opening, and the opening part is equipped with rotatable pressure disk, open in the pressure disk and be equipped with along its radial extending's weld groove, still erect the arm on the base, be equipped with the laser instrument on the arm.

Further, as a preferred option, a plurality of through grooves are circumferentially distributed in the pressure plate by taking the welding groove as a starting point, and rotatable roller strips are arranged in the through grooves.

Further, preferably, the bottom in the shell is provided with an electromagnet concentric with the pressure plate, and the pressure plate is made of a magnetic conductive material.

Further, as preferred, the pressure disk passes through the swivel becket and is connected with the casing, just the cross section of swivel becket is C shape structure, the swivel becket is connected with the casing is rotatable, the pressure disk passes through the key-type connection with the swivel becket and can slides and the restriction rotates from top to bottom, the swivel becket can be rotatory by the drive arrangement drive in the casing, still be equipped with the spring between pressure disk and swivel becket, the spring provides the power that makes pressure disk rebound.

Further, as preferred, be equipped with the supporting pad on the tray, keep off when the tray inserts the casing completely, the supporting pad is in the same axle center with the pressure disk and corresponds the position, elastic buffer has between supporting pad and the tray.

Further, preferably, a plurality of bumps are distributed on the surface of the supporting pad.

Further, as the optimization, the roller strip is of a hollow structure, a flow distributor is arranged in the center of the pressing disc and communicated with each roller strip, and the flow distributor is connected into an external conduit through a guide strip.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the bipolar plate can be compressed by the pressure plate, the laser welds the bipolar plate through the welding groove, the pressure plate can smoothly rotate through the roller strip so as to align the welding groove to different positions of the bipolar plate, the pressure plate can be more tightly attached to the tray by electrifying the electromagnet to adsorb the pressure plate, an external water source is connected to the distributor to cool the roller strip, so that the bipolar plate attached to the pressure plate can be cooled in time, and the stress deformation is reduced.

Drawings

FIG. 1 is a schematic structural view of a laser welding apparatus for a metal bipolar plate to reduce stress deformation;

FIG. 2 is a schematic view of the interior of the housing;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

in the figure: 1. a base; 2. a slide rail; 3. a housing; 4. a tray; 41. a support pad; 5. pressing a plate; 51. a rotating ring; 52. a spring; 6. rolling; 7. welding a groove; 8. a mechanical arm; 9. a laser; 10. a guide bar; 11. a flow distributor; 12. an electromagnet.

Detailed description of the preferred embodiments

Referring to fig. 1 to 3, in an embodiment of the present invention, a metal bipolar plate laser welding device for reducing stress deformation includes a base 1, a slide rail 2 is disposed on the base 1, a housing 3 is disposed on the slide rail 2, a tray 4 capable of being pushed and pulled is disposed in front of the housing 3, an opening is disposed above the housing 3, a rotatable platen 5 is disposed at the opening, a welding groove 7 extending along a radial direction of the platen 5 is formed in the platen 5, a mechanical arm 8 is further erected on the base 1, and a laser 9 is disposed on the mechanical arm 8. When the bipolar plate is placed on the tray 4 and inserted into the housing 3, the bipolar plate can be pressed by the pressure plate 5 and the laser 9 welds the bipolar plate through the weld groove 7.

In this embodiment, a plurality of through grooves are circumferentially distributed in the pressure plate 5 with the welding groove 7 as a starting point, and rotatable roll bars 6 are arranged in the through grooves. The roller strip 6 allows smooth rotation of the pressure plate 5 in order to align the weld bead 7 with different positions of the bipolar plate.

In this embodiment, the bottom is equipped with the electro-magnet 12 concentric with pressure disk 5 in the casing 3, pressure disk 5 is magnetic materials and makes. By electrically attracting the platen 5 with the electromagnet 12, the platen 5 can be more closely attached to the tray 4.

In this embodiment, pressure disk 5 is connected with casing 3 through swivel 51, just swivel 51's cross section is C-shaped structure, swivel 51 and casing 3 rotatable connection, pressure disk 5 passes through the key-type connection with swivel 51 and can slides and restrict the rotation from top to bottom, swivel 51 can be rotatory by the drive arrangement drive in the casing 3, still be equipped with spring 52 between pressure disk 5 and swivel 51, spring 52 provides the power that makes pressure disk 5 move up. That is, the spring 52 naturally moves the platen 5 away from the tray 4 to facilitate entry and exit of bipolar plates on the tray 4 under the platen 5, and the platen 5 compresses the spring 52 to compress the bipolar plates when the electromagnet 12 is energized.

In this embodiment, be equipped with supporting pad 41 on the tray 4, keep off when tray 4 inserts casing 3 completely, supporting pad 41 is in the same axle center corresponding position with pressure disk 5, elastic buffer has between supporting pad 41 and the tray 4. The position of the bipolar plate can be quickly positioned by the support pads 41, and the impact of the platen 5 on the bipolar plate can be reduced.

In this embodiment, a plurality of bumps are distributed on the surface of the supporting pad 41. The bipolar plate is supported by the bumps when placed on the support pads 41, so that the bottom of the bipolar plate can have certain ventilation and heat dissipation capabilities, and the friction force of the bipolar plate can be increased.

In this embodiment, the roll bar 6 is hollow structure, the center of the pressure plate 5 is provided with a flow distributor 11, the flow distributor 11 communicates with each roll bar 6, the flow distributor 11 is connected to an external conduit through a guide bar 10, an external water source is connected into the flow distributor 11 through the external conduit, so that the roll bar 6 can be cooled, a bipolar plate attached to the roll bar 6 can be cooled in time, and the guide bar 10 is rotatably connected with the flow distributor 11, so that the guide bar 10 can enable the external conduit to surround the outside of the shell 3 without hindering the work of the laser 9.

When the bipolar plate cooling device is specifically implemented, the bipolar plate is placed on the tray 4 and then inserted into the shell 3, the electromagnet 12 is electrified to enable the pressure plate 5 to compress the spring 52 so as to compress the bipolar plate, the pressure plate 5 rotates to enable the welding grooves 7 to be aligned to different positions of the bipolar plate, the laser 9 welds the bipolar plate through the welding grooves 7, and meanwhile, an external water source is connected into the flow distributor 11 to cool the bipolar plate 6, so that the bipolar plate attached to the laser can be cooled in time.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.

Claims

1. A metal bipolar plate laser welding device capable of reducing stress deformation comprises a base (1) and is characterized in that a sliding rail (2) is arranged on the base (1), a shell (3) is arranged on the sliding rail (2), a push-pull tray (4) is arranged in front of the shell (3), an opening is formed above the shell (3), a rotatable pressure plate (5) is arranged at the opening, a welding groove (7) extending along the radial direction of the pressure plate (5) is formed in the pressure plate (5), a mechanical arm (8) is further erected on the base (1), and a laser (9) is arranged on the mechanical arm (8);

pressure disk (5) are connected with casing (3) through swivel becket (51), just the cross section of swivel becket (51) is C shape structure, swivel becket (51) and casing (3) rotatable be connected, pressure disk (5) can slide and the restriction is rotated from top to bottom through the key-type connection with swivel becket (51), swivel becket (51) can be rotatory by the drive arrangement drive in casing (3), still be equipped with spring (52) between pressure disk (5) and swivel becket (51), spring (52) provide the power that makes pressure disk (5) rebound.

2. The laser welding device for metal bipolar plates with reduced stress deformation according to claim 1, wherein a plurality of through grooves are circumferentially distributed in the pressure plate (5) starting from the welding groove (7), and rotatable roll bars (6) are arranged in the through grooves.

3. The laser welding device for metal bipolar plates with reduced stress deformation according to claim 1, characterized in that the bottom inside the housing (3) is provided with an electromagnet (12) concentric with the pressure plate (5), and the pressure plate (5) is made of a magnetic conductive material.

4. The laser welding device for metal bipolar plates with reduced stress deformation according to claim 1, wherein the supporting pad (41) is arranged on the tray (4), when the tray (4) is completely inserted into the housing (3), the supporting pad (41) and the pressing plate (5) are in a coaxial corresponding position, and an elastic buffer is arranged between the supporting pad (41) and the tray (4).

5. The laser welding device for metal bipolar plates with reduced stress deformation according to claim 4, wherein a plurality of protrusions are distributed on the surface of the supporting pad (41).

6. The laser welding device for metal bipolar plates with reduced stress deformation according to claim 2, characterized in that the roll bars (6) are hollow, the center of the platen (5) is provided with a flow distributor (11), the flow distributor (11) is communicated with each roll bar (6), and the flow distributor (11) is connected to an external conduit through a guide bar (10).