A substrate densification tooling jig for ultrathin graphite bipolar plates

Abstract

The utility model discloses a kind of substrate densification tool jigs of ultrathin graphite bipolar plate, belong to bipolar plate tool jig technical field, including rotary support frame, tool frame is installed on it, tool frame includes side end frame, it is connected as a whole through link frame therebetween, side end frame and link frame are fixedly connected with fastener, the side end frame includes C-shaped frame, its inside is equipped with threaded rod, adjustable clamping unit is installed on threaded rod. Its technical points are: the bipolar plate tool jig is composed of rotary support frame and tool frame two parts, rotary support frame can drive tool frame to rotate under the action of external motor, avoid appearing dead angle or weak point in densification process, while in tool frame, side end frame can slide along link frame and change the size of clamped fixed plate piece, in addition, adjustable clamping unit that plays the clamping effect to the edge of bipolar plate is composed of upper L-shaped clamping plate and lower L-shaped clamping plate, the clamping fixture between the two can be changed, can be applicable to the clamping work of bipolar plate of different thickness.

Description

Technical Field

[0001] This utility model relates to the technical field of bipolar plate tooling fixtures, specifically a substrate densification tooling fixture for ultrathin graphite bipolar plates. Background Technology

[0002] Graphite bipolar plates possess advantages such as good conductivity, low contact resistance, good stability, and corrosion resistance, but they also have disadvantages such as poor mechanical properties and insufficient airtightness. Therefore, in the process of improving the density of the substrate, these factors need to be comprehensively considered to ensure that other properties are not compromised while improving density. Currently, during the densification process, graphite bipolar plates are typically fixed in position using fixtures to facilitate subsequent processing such as oxidation, graphitization, or sealing after molding, thereby improving their bulk density and mechanical strength. Alternatively, a nano-deposition graphene coating process or other surface treatment technologies can be used to deposit a coating layer on the surface of the graphite bipolar plate.

[0003] The utility model with announcement number CN217023458U discloses a bipolar plate tooling. The bipolar plate tooling of the utility model has a first groove formed on the side plate assembly, which allows the bipolar plate to be placed in the bipolar plate tooling through the first groove. The bipolar plate tooling provides space for loading, cleaning, drying, transfer and temporary storage of bipolar plates, thereby improving the production efficiency and quality of bipolar plates.

[0004] In the aforementioned fixture, the width of the groove used for storage cannot be adjusted, and it can only fix bipolar plates of a specific thickness. At the same time, the distance between the left and right grooves cannot be adjusted, and it can only fix bipolar plates of a specific size. Therefore, it has strong limitations and cannot meet the clamping work of bipolar plates of different sizes and models. In addition, the aforementioned fixture cannot move the bipolar plate after it is installed, which may result in certain dead corners during the densification process, leading to uneven densification effect and affecting subsequent use. Therefore, in order to address the above problems, a substrate densification fixture for ultrathin graphite bipolar plates is proposed. Utility Model Content

[0005] The technical problem this invention aims to solve is to provide a substrate densification fixture for ultrathin graphite bipolar plates. This fixture consists of two parts: a rotating support frame and a fixture frame. The rotating support frame can drive the fixture frame to rotate under the action of an external motor, avoiding dead angles or weak points during the densification process. In the fixture frame, the side end frame can slide along the connecting frame to change the size of the clamped plate. Furthermore, the adjustable clamping unit that clamps the edge of the bipolar plate consists of an upper L-shaped clamping plate and a lower L-shaped clamping plate. The clamping fixture can be changed between the two, making it suitable for clamping bipolar plates of different thicknesses. In summary, the fixture frame can effectively clamp and fix bipolar plates of different sizes and thicknesses, and has a wide range of applications. It solves the technical problems of comparative technologies where the fixture is difficult to meet the clamping requirements of bipolar plates of different sizes and models, exhibiting strong limitations, and where the fixture cannot drive the bipolar plate to move after installation, potentially leading to dead angles and uneven densification effects during the densification process.

[0006] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0007] A substrate densification fixture for an ultrathin graphite bipolar plate includes a rotating support frame on which a fixture frame is mounted. The fixture frame includes two symmetrically arranged side end frames connected by a connecting frame. The side end frames and the connecting frame are fixedly connected by fasteners. Each side end frame includes a C-shaped frame with several threaded rods fixedly arranged inside. Several sets of adjustable clamping units are mounted on the threaded rods. Each adjustable clamping unit includes an upper L-shaped clamping plate and a lower L-shaped clamping plate, which are slidably fitted onto the threaded rods and arranged symmetrically. Both clamping plates have several threaded locking elements on their backs that are threadedly connected to the threaded rods. This bipolar plate... The plate tooling fixture consists of two parts: a rotating support frame and a tooling frame. The rotating support frame can drive the tooling frame to rotate under the action of an external motor, avoiding dead corners or weak points during the densification process. In the tooling frame, the side end frame can slide along the connecting frame to change the size of the plate being clamped and fixed. In addition, the adjustable clamping unit that clamps the edge of the bipolar plate consists of an upper L-shaped clamping plate and a lower L-shaped clamping plate. The clamping fixture can be changed between the two, making it suitable for clamping bipolar plates of different thicknesses. In summary, the tooling fixture can effectively clamp and fix bipolar plates of different sizes and thicknesses, and has a wide range of applications.

[0008] In one possible implementation, the threaded locking component includes a connecting end piece, which is fixedly connected to the upper L-shaped clamping plate and the lower L-shaped clamping plate. A snap-fit ​​sleeve is fixedly mounted on the connecting end piece, and a snap-fit ​​composite nut is rotatably connected to the snap-fit ​​sleeve. The connecting end piece and the snap-fit ​​sleeve have through holes that communicate with each other and whose size is larger than the outer cross-sectional size of the threaded rod. Based on the above structural form, the snap-fit ​​composite nut can be rotatably connected to the upper L-shaped clamping plate and the lower L-shaped clamping plate. That is, the snap-fit ​​composite nut can drive the upper L-shaped clamping plate and the lower L-shaped clamping plate to move, thereby changing the distance between them.

[0009] In one possible implementation, the snap-fit ​​composite nut is composed of three parts connected in sequence, from bottom to top: a snap-fit ​​cylinder, a hexagonal nut, and a contact ring. The snap-fit ​​cylinder is rotatably snapped into the snap-fit ​​sleeve. Based on the above structure, the hexagonal nut can be rotatably connected to the upper L-shaped clamp and the lower L-shaped clamp, while the contact ring can prevent the hexagonal nuts from being damaged by direct contact and friction.

[0010] In one possible implementation, a middle limiting plate is fixedly provided in the middle of the threaded rod, and an end clamping wheel is threadedly connected to the top of the threaded rod. The end clamping wheel and the middle limiting plate can work together to squeeze and fix all the adjustable clamping units set between them into one piece.

[0011] In one possible implementation, both the upper L-shaped clamp and the lower L-shaped clamp are fixedly provided with limiting end pieces at their rear ends. The limiting end pieces can abut against the ends of the bipolar plates when they are placed, thus playing a positioning role. Both plates are provided with several slots, which can increase the exposed area at the edge of the bipolar plates and improve the densification effect.

[0012] In one possible implementation, the connecting frame is in the shape of a grid, with several longitudinally arranged adjustment slots on it. The opening of the adjustment slots provides the necessary structural basis for adjusting the position of the side end frame.

[0013] In one possible implementation, the fastener includes a slider fixedly mounted on a C-shaped frame, which is slidably mounted in an adjustment groove. This connection method allows for free adjustment of the distance between the side frames to achieve adjustment of the clamping size. A locking screw is fixedly mounted on the fastener, and a locking wheel is threaded onto the locking screw. When it is necessary to fix the position of the side frame, tightening the locking wheel will fix the position of the side frame through friction.

[0014] In one possible implementation, the rotating support frame includes a base plate on which a support column is fixedly mounted. A rotating shaft is rotatably connected to the top of the support column, and a connecting end plate is fixedly connected to its end. The connecting end plate is fixedly connected to the C-shaped frame. When the rotating shaft is connected to an external motor drive, the entire tooling frame can be driven to rotate by the rotation of the rotating shaft.

[0015] In summary, this utility model has the following beneficial technical effects:

[0016] The bipolar plate tooling fixture consists of two parts: a rotating support frame and a tooling frame. The rotating support frame can drive the tooling frame to rotate under the action of an external motor, thus avoiding dead corners or weak points during the densification process.

[0017] In the tooling fixture, the side end frame can slide along the connecting frame to change the size of the clamped plate. In addition, the adjustable clamping unit that clamps the edge of the bipolar plate consists of an upper L-shaped clamping plate and a lower L-shaped clamping plate. The clamping fixture between the two can be changed, which can be used to clamp bipolar plates of different thicknesses. In summary, the tooling fixture can effectively clamp and fix bipolar plates of different sizes and thicknesses, and has a wide range of applications. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the tooling frame structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the side end frame structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the adjustable clamping unit structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the threaded locking component of this utility model.

[0024] In the diagram: 1. Rotating support frame; 11. Base plate; 12. Support column; 13. Rotating shaft; 14. Connecting end plate; 2. Side end frame; 21. C-shaped frame; 22. Threaded rod; 23. Middle limit plate; 24. End clamping wheel; 3. Connecting frame; 31. Adjusting groove; 4. Adjustable clamping unit; 41. Upper L-shaped clamping plate; 42. Lower L-shaped clamping plate; 43. Threaded locking component; 431. Connecting end plate; 432. Snap-fit ​​cylinder; 433. Snap-fit ​​composite nut; 44. Limiting end plate; 45. Groove; 5. Fastener; 51. Slider; 52. Locking screw; 53. Locking wheel. Detailed Implementation

[0025] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0026] like Figure 1 - Figure 4 As shown in the figure, this embodiment provides a substrate densification fixture for an ultrathin graphite bipolar plate, including a rotating support frame 1 on which a fixture frame is mounted. The fixture frame includes two symmetrically arranged side end frames 2, which are connected as one unit by a connecting frame 3. The side end frames 2 and the connecting frame 3 are fixedly connected by fasteners 5. The side end frames 2 include a C-shaped frame 21, which has several threaded rods 22 fixedly arranged inside. Several sets of adjustable clamping units 4 are installed on the threaded rods 22. The adjustable clamping unit 4 includes an upper L-shaped clamping plate 41 and a lower L-shaped clamping plate 42, which are slidably sleeved on the threaded rods 22 and symmetrically arranged with each other. Both of them have several threads connected to the threaded rods 22 on their back sides. The threaded locking component 43 is part of the bipolar plate tooling fixture, which consists of a rotating support frame 1 and a tooling frame. The rotating support frame 1 can drive the tooling frame to rotate under the action of an external motor, avoiding dead corners or weak points during the densification process. In the tooling frame, the side end frame 2 can slide along the connecting frame 3 to change the size of the clamped plate. In addition, the adjustable clamping unit 4, which clamps the edge of the bipolar plate, consists of an upper L-shaped clamping plate 41 and a lower L-shaped clamping plate 42. The clamping fixture can be changed between the two, which can be used for clamping bipolar plates of different thicknesses. In summary, the tooling fixture can effectively clamp and fix bipolar plates of different sizes and thicknesses, and has a wide range of applications.

[0027] like Figure 5 As shown, the threaded locking component 43 includes a connecting end piece 431, which is fixedly connected to the upper L-shaped clamping plate 41 and the lower L-shaped clamping plate 42. A snap-fit ​​sleeve 432 is fixedly mounted on the connecting end piece 431, and a snap-fit ​​composite nut 433 is rotatably connected to the snap-fit ​​sleeve 432. The connecting end piece 431 and the snap-fit ​​sleeve 432 have through holes that communicate with each other and have a size larger than the outer cross-sectional size of the threaded rod 22. Based on the above structural form, the snap-fit ​​composite nut 433 can be rotatably connected to the upper L-shaped clamping plate 41 and the lower L-shaped clamping plate 42, i.e. The upper L-shaped clamping plate 41 and the lower L-shaped clamping plate 42 can be moved by the snap-fit ​​composite nut 433 to change the distance between them. The snap-fit ​​composite nut 433 is composed of three parts connected in sequence, from bottom to top: snap-fit ​​cylinder, hexagonal nut and contact ring. The snap-fit ​​cylinder is rotatably snapped into the snap-fit ​​cylinder 432. Based on the above structure, the hexagonal nut can be rotatably connected to the upper L-shaped clamping plate 41 and the lower L-shaped clamping plate 42, while the contact ring can prevent the hexagonal nut from being damaged by direct contact and friction.

[0028] like Figure 3 - Figure 4As shown, a middle limiting piece 23 is fixedly installed in the middle of the threaded rod 22, and an end clamping wheel 24 is threadedly connected to the top of the threaded rod 22. The end clamping wheel 24 and the middle limiting piece 23 can work together to squeeze and fix all the adjustable clamping units 4 set between them into one piece. In addition, the rear ends of the upper L-shaped clamping plate 41 and the lower L-shaped clamping plate 42 are both fixedly provided with limiting end pieces 44. The limiting end pieces 44 can abut against the ends of the bipolar plates when they are placed, and play a positioning role. Both of them have several slots 45. The slots 45 can increase the exposed area at the edge of the bipolar plates and improve the densification effect.

[0029] like Figure 1 - Figure 2 As shown, the connecting frame 3 is generally shaped like a grid, and has several longitudinally arranged adjustment slots 31. The opening of the adjustment slots 31 provides the necessary structural basis for adjusting the position of the side end frame 2. The fastener 5 includes a slider 51 fixedly mounted on the C-shaped frame 21, which is slidably mounted in the adjustment slot 31. This connection method can freely adjust the distance between the side end frames 2 to achieve the adjustment of the clamping size. A locking screw 52 is fixedly mounted on it, and a locking wheel 53 is threadedly connected to the locking screw 52. When it is necessary to fix the position of the side end frame 2, tightening the locking wheel 53 can fix the position of the side end frame 2 through friction.

[0030] like Figure 1 As shown, the rotating support frame 1 includes a base plate 11, on which a support column 12 is fixedly mounted. A rotating shaft 13 is rotatably connected to the top of the support column 12, and a connecting end plate 14 is fixedly connected to its end. The connecting end plate 14 is fixedly connected to the C-shaped frame 21. When the rotating shaft 13 is connected to an external motor drive, the entire tooling frame can be driven to rotate by the rotation of the rotating shaft 13.

[0031] The working principle and usage process of this utility model:

[0032] The bipolar plate tooling fixture consists of two parts: a rotating support frame 1 and a tooling frame. The rotating support frame 1 supports the entire tooling frame. When the rotating shaft 13 is connected to an external motor drive, the entire tooling frame can be driven to rotate through the rotation of the rotating shaft 13, thus avoiding dead corners or weak points during the densification process.

[0033] In the tooling fixture, the side end frame 2 can slide along the connecting frame 3 to change the size of the clamped plate. In addition, the adjustable clamping unit 4, which clamps the edge of the bipolar plate, is composed of an upper L-shaped clamping plate 41 and a lower L-shaped clamping plate 42. The clamping fixture can be changed between the two, which can be used to clamp bipolar plates of different thicknesses. In summary, the tooling fixture can effectively clamp and fix bipolar plates of different sizes and thicknesses, and has a wide range of applications.

[0034] The above-mentioned adjustment principle is specifically manifested in the rotational connection of the snap-fit ​​composite nut 433 with the upper L-shaped clamp 41 and the lower L-shaped clamp 42. When the snap-fit ​​composite nut 433 is turned, it will move up and down along the threaded rod 22, thereby driving the upper L-shaped clamp 41 and the lower L-shaped clamp 42 to move and change the distance between them. In addition, the fastener 5 includes a slider 51 fixedly set on the C-shaped frame 21, which is slidably set in the adjustment groove 31. This connection form can freely adjust the distance between the side end frames 2 to realize the adjustment of the clamping size. A locking screw 52 is fixedly set on it, and a locking wheel 53 is threadedly connected to the locking screw 52. When it is necessary to fix the position of the side end frame 2, tightening the locking wheel 53 can fix the position of the side end frame 2 through friction.

[0035] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A substrate densification tooling fixture for ultrathin graphite bipolar plates, characterized in that, include: Rotary support frame (1) is mounted on which tooling frame is installed. The tooling frame includes two symmetrically arranged side end frames (2), which are connected as one unit by a connecting frame (3). The side end frames (2) and the connecting frame (3) are fixedly connected by fasteners (5). The side end frame (2) includes a C-shaped frame (21), which has several threaded rods (22) fixedly installed inside, and several sets of adjustable clamping units (4) are installed on the threaded rods (22); The adjustable clamping unit (4) includes an upper L-shaped clamping plate (41) and a lower L-shaped clamping plate (42), which are slidably sleeved on the threaded rod (22) and arranged symmetrically to each other. Both of them have several threaded locking parts (43) that are threadedly connected to the threaded rod (22) on their back sides.

2. The substrate densification fixture for an ultrathin graphite bipolar plate according to claim 1, characterized in that: The threaded locking component (43) includes a connecting end piece (431), which is fixedly connected to the upper L-shaped clamp (41) and the lower L-shaped clamp (42). A snap-fit ​​cylinder (432) is fixedly installed on it, and a snap-fit ​​composite nut (433) is rotatably connected to the snap-fit ​​cylinder (432). The connecting end piece (431) and the snap-fit ​​cylinder (432) are provided with through holes that are connected and have a size larger than the outer cross-sectional size of the threaded rod (22).

3. The substrate densification fixture for an ultrathin graphite bipolar plate according to claim 2, characterized in that: The snap-fit ​​composite nut (433) consists of three parts connected in sequence, from bottom to top: snap-fit ​​cylinder, hexagonal nut and contact ring, wherein the snap-fit ​​cylinder and the snap-fit ​​cylinder (432) are rotatably snap-fitted together.

4. The substrate densification fixture for an ultrathin graphite bipolar plate according to claim 1, characterized in that: A middle limiting piece (23) is fixedly provided in the middle of the threaded rod (22), and an end clamping wheel (24) is threadedly connected to the top of the threaded rod (22).

5. The substrate densification fixture for an ultrathin graphite bipolar plate according to claim 1, characterized in that: The upper L-shaped clamp (41) and the lower L-shaped clamp (42) are both fixedly provided with limit end pieces (44) at their rear ends, and both are provided with a number of slots (45).

6. The substrate densification fixture for an ultrathin graphite bipolar plate according to claim 1, characterized in that: The connecting frame (3) is shaped like a grid, and several longitudinally arranged adjustment slots (31) are provided on it.

7. The substrate densification fixture for an ultrathin graphite bipolar plate according to claim 6, characterized in that: The fastener (5) includes a slider (51) fixedly mounted on a C-shaped frame (21), which is slidably mounted in an adjustment groove (31), and a locking screw (52) is fixedly mounted on it, with a locking wheel (53) threadedly connected to the locking screw (52).

8. The substrate densification fixture for an ultrathin graphite bipolar plate according to claim 1, characterized in that: The rotating support frame (1) includes a base plate (11) on which a support column (12) is fixedly installed. A rotating shaft (13) is rotatably connected to the top of the support column (12), and a connecting end plate (14) is fixedly connected to its end. The connecting end plate (14) is fixedly connected to the C-shaped frame (21).

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