Laser cutting jig for metal bipolar plate of fuel cell

Abstract

The utility model provides a laser cutting jig for a fuel cell metal bipolar plate, which comprises an outer frame and an inner cavity, a clearance groove is arranged between the outer edge of the inner cavity and the inner circumference of the outer frame, and the outer frame is connected with the inner cavity through a transverse reinforcing block and / or a longitudinal reinforcing block; therefore, through the arrangement of the transverse reinforcing blocks and / or the longitudinal reinforcing blocks, the technical problem that during laser cutting, the jig is prone to deformation and looseness under the laser high temperature can be solved.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting technology, specifically to a laser cutting fixture for metal bipolar plates in fuel cells. Background Technology

[0002] Metal bipolar plates are crucial components of hydrogen fuel cells, serving to collect current, distribute gas, and manage water and heat. The manufacturing process typically involves first stamping and cutting thin metal sheets to create anode and cathode flow field plates. These plates are then welded together to form coolant channels and anode and cathode flow fields. To ensure precise dimensions of the flow channels and fields, the flow channels of the two metal bipolar plates must fit together very precisely during welding to form a complete flow channel.

[0003] During the laser cutting of metal bipolar plates, due to the thinness of the material, the surface of a single plate will have a certain degree of warping deformation after stamping and stretching, making it difficult to position it accurately.

[0004] Patent No. 202121503368.1 discloses a laser cutting positioning fixture consisting of three parts: an outer frame, an inner cavity, and a connecting block. The inner cavity is connected to the outer cavity via the connecting block, and the connecting block is fixedly connected to the outer frame and the inner cavity by bolts. However, this structure is prone to deformation and loosening under the high temperature of laser, thus affecting the cutting accuracy. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a laser cutting fixture for metal bipolar plates of fuel cells that prevents deformation and loosening of the metal bipolar plate caused by the high temperature of the laser during laser cutting.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A laser cutting fixture for metal bipolar plates of fuel cells includes an outer frame and an inner cavity. An anti-cavity groove is provided between the outer edge of the inner cavity and the inner periphery of the outer frame. The outer frame is connected to the inner cavity by a transverse reinforcing block and / or a longitudinal reinforcing block.

[0008] In one embodiment, there are at least two lateral reinforcing blocks.

[0009] In one embodiment, there are at least two longitudinal reinforcing blocks.

[0010] In one embodiment, the lateral length of the lateral reinforcing block is equal to the lateral length of the outer frame.

[0011] In one embodiment, the longitudinal length of the longitudinal reinforcing block is less than the longitudinal length of the outer frame.

[0012] In one embodiment, both the transverse reinforcing block and the longitudinal reinforcing block are disposed on the same surface of the inner cavity and the outer frame.

[0013] In one embodiment, the width of the clearance groove is 1-2 cm.

[0014] In one embodiment, the inner cavity is provided with a groove that matches the protrusion of the metal bipolar plate.

[0015] In one embodiment, the laser cutting fixture for the metal bipolar plate of a fuel cell further includes a magnetic column located away from the clearance groove.

[0016] In one embodiment, the magnetic post is attached to a metal bipolar plate by means of adhesive bonding.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This utility model consists of an outer frame and an inner cavity. A clearance groove is provided between the outer edge of the inner cavity and the inner circumference of the outer frame. The outer frame is connected to the inner cavity by a transverse reinforcing block and / or a longitudinal reinforcing block. Thus, by setting the transverse reinforcing block and / or the longitudinal reinforcing block, the technical problem of deformation and loosening of the fixture under the high temperature of the laser during laser cutting can be prevented. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0020] Figure 2 This utility model Figure 1 A schematic diagram of the structure viewed from below;

[0021] Figure 3 This utility model Figure 1 A top view of the structure where the metal bipolar plates are placed;

[0022] Figure 4 This utility model Figure 3 Schematic diagram of the structure of section A.

[0023] In the diagram: 10. Outer frame, 15. Clearance groove, 20. Inner cavity, 21. Horizontal reinforcing block, 22. Groove, 25. Vertical reinforcing block, 30. Magnetic column. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Example 1

[0026] like Figure 1-4As shown, this embodiment includes an outer frame 10 and an inner cavity 20. A clearance groove 15 is provided between the outer edge of the inner cavity and the inner periphery of the outer frame 10. In this embodiment, the width of the clearance groove 15 is 1-2cm. Thus, by setting the clearance groove 15 of 1-2cm, it is possible to ensure that the fixture provides sufficient support for the product while facilitating the smooth passage of the metal residue melted by the laser under the action of the high-pressure airflow of the laser equipment.

[0027] Under the action of high-pressure airflow in the equipment, an excessively wide clearance groove 15 can cause the thin metal bipolar plate to collapse or even shift with the fixture, thereby affecting the cutting accuracy.

[0028] The outer frame 10 is connected to the inner cavity 20 via transverse reinforcing blocks 21 and / or longitudinal reinforcing blocks 25. There are at least two transverse reinforcing blocks 21 and at least two longitudinal reinforcing blocks 25. In this embodiment, there are three transverse reinforcing blocks 21, respectively arranged transversely at the upper, middle, and lower parts of one side of the outer frame 10. There are ten longitudinal reinforcing blocks 25, each connected to one of the three transverse reinforcing blocks 21 and fixedly connected to the inner cavity 20 and the outer frame 10. Thus, through the arrangement of the transverse reinforcing blocks 21 and the longitudinal reinforcing blocks 25, the fixture achieves maximum weight reduction while maintaining sufficient strength and stability.

[0029] In this embodiment, the transverse reinforcing block 21, the longitudinal reinforcing block 25, the outer frame 10, and the inner cavity 20 are integrally formed; or the transverse reinforcing block 21 and the longitudinal reinforcing block 25 are carved out from the bottom surface of the fixture.

[0030] The transverse length of the transverse reinforcing block 21 is equal to the transverse length of the outer frame 10, and the longitudinal length of the longitudinal reinforcing block 25 is less than the longitudinal length of the outer frame 10. Both the transverse reinforcing block 21 and the longitudinal reinforcing block 25 are set on the same surface of the inner cavity 20 and the outer frame 10. This can prevent the technical problem of deformation and loosening of the fixture under the high temperature of the laser during laser cutting.

[0031] The inner cavity 20 is provided with a groove 22 that matches the protrusion of the metal bipolar plate, such as Figure 4 As shown, it also includes a magnetic post 30, which is located away from the clearance groove 15. In this embodiment, the magnetic post 30 is attached to the metal bipolar plate.

[0032] By providing grooves 22 on the front of the fixture that fit the raised portion of the entire metal bipolar plate, the entire raised portion of the metal bipolar plate can fall precisely into the grooves 22. After the metal bipolar plate is precisely positioned according to the grooves 22, several magnetic pillars 30 are used as an aid. The magnetic attraction between the magnetic pillars 30 and the fixture fixes the metal bipolar plate to the fixture, thereby preventing interference with the movement of the laser head.

[0033] Furthermore, this invention utilizes the flow channels and all surfaces (protrusions) of the metal bipolar plate to fit into the grooves 22 in the fixture, which not only ensures more effective positioning of the metal bipolar plate and the fixture, but also eliminates certain warping deformation of the metal bipolar plate through the magnetic attraction between the magnetic post 30 and the fixture, thus achieving more precise cutting accuracy.

[0034] This invention utilizes a groove 22 in the inner cavity 20 to fit the protruding portion of the entire metal bipolar plate, ensuring effective positioning across the entire surface area of ​​the metal bipolar plate. This avoids the issue in patent number 202121503368.1, where the four positioning connecting blocks prevent proper positioning of some protrusions on the metal bipolar plate, and causes displacement and vibration under the high-pressure airflow of the laser equipment when the metal bipolar plate warps, thus affecting cutting accuracy and quality. Furthermore, this invention employs an integral structure (eliminating the assembly structure of patent number 202121503368.1), avoiding complex connection and assembly, and also eliminating the risk of deformation and loosening caused by the high temperature of the laser.

[0035] Example 2

[0036] like Figure 1-2 As shown, this embodiment includes an outer frame 10 and an inner cavity 20. A clearance groove 15 is provided between the outer edge of the inner cavity and the inner periphery of the outer frame 10. In this embodiment, the width of the clearance groove 15 is 1-2cm. Thus, by setting the clearance groove 15 of 1-2cm, it is possible to ensure that the fixture provides sufficient support for the product while facilitating the smooth passage of the metal residue melted by the laser under the action of the high-pressure airflow of the laser equipment.

[0037] Under the action of high-pressure airflow in the equipment, an excessively wide clearance groove 15 can cause the thin metal bipolar plate to collapse or even shift with the fixture, thereby affecting the cutting accuracy.

[0038] The outer frame 10 is connected to the inner cavity 20 by transverse reinforcing blocks 21 and / or longitudinal reinforcing blocks 25. There are at least two transverse reinforcing blocks 21 and at least two longitudinal reinforcing blocks 25. In this embodiment, there are three transverse reinforcing blocks 21, which are respectively arranged transversely at the upper, middle and lower parts of one side of the outer frame 10. There are five longitudinal reinforcing blocks 25, which are respectively connected to the three transverse reinforcing blocks 21 and fixedly connected to the inner cavity 20 and the outer frame 10.

[0039] In this embodiment, the transverse reinforcing block 21, the longitudinal reinforcing block 25, the outer frame 10, and the inner cavity 20 are integrally formed; or the transverse reinforcing block 21 and the longitudinal reinforcing block 25 are carved out from the bottom surface of the fixture.

[0040] The transverse length of the transverse reinforcing block 21 is equal to the transverse length of the outer frame 10, and the longitudinal length of the longitudinal reinforcing block 25 is less than the longitudinal length of the outer frame 10. Both the transverse reinforcing block 21 and the longitudinal reinforcing block 25 are set on the same surface of the inner cavity 20 and the outer frame 10. This can prevent the technical problem of deformation and loosening of the fixture under the high temperature of the laser during laser cutting.

[0041] The inner cavity 20 is provided with a groove 22 that matches the protrusion of the metal bipolar plate, and also includes a magnetic post 30. The magnetic post 30 is away from the clearance groove 15. In this embodiment, the magnetic post 30 is attached to one side of the inner cavity 20 and the outer frame 10 with the transverse reinforcing block 21 and / or the longitudinal reinforcing block 25.

[0042] By providing grooves 22 on the front of the fixture that fit the raised portion of the entire metal bipolar plate, the entire raised portion of the metal bipolar plate can fall precisely into the grooves 22. After the metal bipolar plate is precisely positioned according to the grooves 22, several magnetic pillars 30 are used as an aid. The magnetic attraction between the magnetic pillars 30 and the fixture fixes the metal bipolar plate to the fixture, thereby preventing interference with the movement of the laser head.

[0043] Furthermore, this invention utilizes the flow channels and all surfaces (protrusions) of the metal bipolar plate to fit into the grooves 22 in the fixture, which not only ensures more effective positioning of the metal bipolar plate and the fixture, but also eliminates certain warping deformation of the metal bipolar plate through the magnetic attraction between the magnetic post 30 and the fixture, thus achieving more precise cutting accuracy.

[0044] This invention utilizes a groove 22 in the inner cavity 20 to fit the protruding portion of the entire metal bipolar plate, ensuring effective positioning across the entire surface area of ​​the metal bipolar plate. This avoids the issue in patent number 202121503368.1, where the four positioning connecting blocks prevent proper positioning of some protrusions on the metal bipolar plate, and causes displacement and vibration under the high-pressure airflow of the laser equipment when the metal bipolar plate warps, thus affecting cutting accuracy and quality. Furthermore, this invention employs an integral structure (eliminating the assembly structure of patent number 202121503368.1), avoiding complex connection and assembly, and also eliminating the risk of deformation and loosening caused by the high temperature of the laser.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the technical solutions of this utility model have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A laser cutting fixture for metal bipolar plates of fuel cells, comprising an outer frame (10) and an inner cavity (20), wherein a clearance groove (15) is provided between the outer edge of the inner cavity and the inner periphery of the outer frame (10), characterized in that: The outer frame (10) is connected to the inner cavity (20) by a transverse reinforcing block (21) and / or a longitudinal reinforcing block (25).

2. The laser cutting fixture for metal bipolar plates of fuel cells according to claim 1, characterized in that: There are at least two transverse reinforcing blocks (21).

3. The laser cutting fixture for metal bipolar plates of fuel cells according to claim 1, characterized in that: There are at least two longitudinal reinforcing blocks (25).

4. The laser cutting fixture for metal bipolar plates of fuel cells according to claim 1, characterized in that: The lateral length of the horizontal reinforcing block (21) is equal to the lateral length of the outer frame (10).

5. The laser cutting fixture for metal bipolar plates of fuel cells according to claim 1, characterized in that: The longitudinal length of the longitudinal reinforcing block (25) is less than the longitudinal length of the outer frame (10).

6. The laser cutting fixture for metal bipolar plates of fuel cells according to claim 1, characterized in that: Both the transverse reinforcing block (21) and the longitudinal reinforcing block (25) are disposed on the same surface of the inner cavity (20) and the outer frame (10).

7. The laser cutting fixture for metal bipolar plates of fuel cells according to claim 1, characterized in that: The width of the clearance groove (15) is 1-2cm.

8. The laser cutting fixture for metal bipolar plates of fuel cells according to claim 1, characterized in that: The inner cavity (20) is provided with a groove (22) that matches the protrusion of the metal bipolar plate.

9. The laser cutting fixture for metal bipolar plates of fuel cells according to claim 1, characterized in that: The laser cutting fixture for the metal bipolar plate of the fuel cell also includes a magnetic column (30) located away from the clearance groove (15).

10. The laser cutting fixture for metal bipolar plates of fuel cells according to claim 9, characterized in that: The magnetic post (30) is attached to the metal bipolar plate by means of adhesive bonding.

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