Metal bipolar plate laser welding upper pressing plate integrated taking and placing tool

Abstract

The utility model relates to fuel cell metal bipolar plate laser welding field discloses a kind of metal bipolar plate laser welding upper pressing plate integration taking and placing tool, including tool base plate, fixing device and taking and placing device, tool base plate is equipped with multiple limiting through holes, multiple fixing devices are connected with tool base plate, multiple taking and placing devices are connected with tool base plate, and are connected with fixing device, and taking and placing device includes quick vice, upper pressing plate, limiting mechanism and briquetting taking and placing mechanism, quick vice is connected with fixing device, and fixing device is equipped with pressure head through -hole at quick vice junction, and the pressure head of quick vice is connected with upper pressing plate after passing pressure head through -hole, limiting mechanism lower end is connected with tool base plate, limiting mechanism upper end is connected with upper pressing plate, briquetting taking and placing mechanism upper end is connected with upper pressing plate, and briquetting taking and placing mechanism lower end is set at limiting through hole place.The utility model can take and place multiple briquetting simultaneously, significantly improve production efficiency, reduce bipolar plate bruise scratch risk, improve welding qualification rate.

Description

Technical Field

[0001] This utility model relates to the field of laser welding of metal bipolar plates for fuel cells, and specifically to an integrated loading and unloading tooling for upper pressure plates in laser welding of metal bipolar plates. Background Technology

[0002] A fuel cell is a power generation device that directly converts the chemical energy in fuel and oxidant into electrical energy through an electrochemical reaction. It boasts numerous advantages, including high energy conversion efficiency, zero pollution, and low noise. A single fuel cell mainly consists of bipolar plates and membrane electrode assemblies (MEAs). Multiple bipolar plates are stacked to form a fuel cell stack. The bipolar plates are formed by laser welding two metal monopolar plates together. For example, an 80kW fuel cell stack typically consists of approximately 300 bipolar plates and 300 MEAs, and the welding production of the bipolar plates for a single stack takes about two days.

[0003] Under current technological conditions, bipolar plate welding is limited by the welding line, resulting in the pressure plates on the bipolar plate welding fixture typically consisting of multiple pressure blocks. During the welding process, these pressure blocks need to be removed and placed one by one, which prolongs the welding process and reduces efficiency. Moreover, the repeated removal and placement of pressure blocks easily causes defects such as pressure marks and scratches on the plates. In summary, the bipolar plate welding process has long suffered from long cycle times and low yield rates, which has become a key bottleneck in the fuel cell stack production process.

[0004] As the design power of fuel cell stacks continues to increase, the number of individual cells constituting the core also increases accordingly, making the aforementioned problems increasingly prominent and urgently requiring effective solutions. Therefore, this invention proposes an integrated pick-and-place tooling for welding metal bipolar plates and mounting plates, aiming to address the problem of long pick-and-place times for pressing blocks and reduce the incidence of defects during production. Thus, in-depth research and design of a novel integrated pick-and-place tooling for laser welding metal bipolar plates and mounting plates is of paramount practical significance in overcoming the shortcomings of existing technologies. Utility Model Content

[0005] To address the problems in existing technologies such as long loading and unloading time of pressure plates during laser welding of metal bipolar plates, extended welding process time, reduced welding efficiency, and damage and scratches to the plates, this utility model provides an integrated loading and unloading fixture for upper pressure plates in laser welding of metal bipolar plates.

[0006] The technical solution adopted by this utility model to achieve the above objectives is: an integrated pick-and-place tooling for a metal bipolar plate laser welding upper pressure plate, comprising...

[0007] The tooling base plate (10) is provided with multiple limiting through holes (10-1), and the cross-sectional area of ​​each limiting through hole (10-1) is smaller than the area of ​​the pressure block;

[0008] A fixing device, wherein there are multiple fixing devices, and all of the multiple fixing devices are connected to the tooling base plate;

[0009] A pick-and-place device, comprising multiple devices, is connected to the tooling base plate and the fixing device. Each pick-and-place device includes a quick-release caliper, an upper pressure plate, a limiting mechanism, and a block pick-and-place mechanism. The quick-release caliper is connected to the fixing device, and a pressure head through hole is provided at the connection point between the fixing device and the quick-release caliper. The pressure head of the quick-release caliper passes through the pressure head through hole and connects to the upper pressure plate. The lower end of the limiting mechanism is connected to the tooling base plate, and the upper end of the limiting mechanism is connected to the upper pressure plate. The upper end of the block pick-and-place mechanism is connected to the upper pressure plate, and the lower end of the block pick-and-place mechanism is located at the limiting through hole. The block pick-and-place mechanism is used to pick up or place blocks.

[0010] According to some embodiments of the present invention, a metal bipolar plate laser welding upper pressure plate integrated pick-and-place fixture is provided. The fixing device includes a side support plate and an upper support plate. There are two side support plates. The lower ends of the two side support plates are connected to the upper surface of the fixture base plate. The upper sidewalls of the two side support plates are respectively connected to the left and right ends of the upper support plate. The upper support plate is provided with the pressure head through hole.

[0011] According to some embodiments of the present invention, a metal bipolar plate laser welding upper pressure plate integrated pick-and-place tooling is provided, wherein both side support plates are bolted to the upper support plate.

[0012] According to some embodiments of the present invention, a metal bipolar plate laser welding upper pressure plate integrated pick-and-place tooling is provided. The quick clamp further includes a support and a connecting rod assembly. The support is connected to the upper surface of the upper support plate and is located radially outside the pressure head through hole. The support and the pressure head through hole are provided with through holes at corresponding positions. The pressure head passes through the through hole and the pressure head through hole and is connected to the upper pressure plate. The connecting rod assembly is connected to the pressure head and the support. The pressure head is pressed down or lifted up by the connecting rod assembly.

[0013] According to some embodiments of the present invention, an integrated loading and unloading fixture for laser welding upper pressure plate of metal bipolar plates is provided. The limiting mechanism includes a sliding bearing, a limiting rod and a limiting spring. The upper pressure plate is provided with a limiting through hole. The sliding bearing is disposed in the limiting through hole. The limiting rod passes through the sliding bearing and the lower end of the limiting rod is connected to the base plate of the fixture. The limiting spring is sleeved on the radially outer side of the limiting rod.

[0014] According to some embodiments of the present invention, an integrated loading and unloading tooling for a metal bipolar plate laser welding upper pressure plate is provided. The pressure block loading and unloading mechanism includes a mounting rod and a magnet. The upper end of the mounting rod is connected to the lower surface of the upper pressure plate, and the lower end of the mounting rod is connected to the upper surface of the magnet. The magnet is disposed at the limiting through hole.

[0015] According to some embodiments of the present invention, a metal bipolar plate laser welding upper pressure plate integrated pick-and-place tooling is provided, wherein the limiting mechanism comprises multiple components.

[0016] According to some embodiments of the present invention, a metal bipolar plate laser welding upper pressure plate integrated pick-and-place tooling is provided, wherein the pressure block pick-and-place mechanism comprises multiple components.

[0017] According to some embodiments of the present invention, a metal bipolar plate laser welding upper pressure plate integrated pick-and-place fixture is provided, wherein a plurality of fixture handles are connected to the upper surface of the fixture base plate.

[0018] According to some embodiments of the present invention, a metal bipolar plate laser welding upper pressure plate integrated pick-and-place tooling is provided, wherein the tooling has two handles.

[0019] This utility model discloses an integrated upper pressure plate lifting and placing fixture for laser welding of metal bipolar plates. Combining the locking and releasing functions of a quick-release caliper, it achieves the lifting and placing of the upper pressure plate and pressure blocks. With the assistance of a limiting mechanism, the overall structure is more stable. The number and position of the limiting through holes and the pressure block lifting and placing mechanism are adjusted according to the number and distribution of all pressure blocks on the bipolar plate being welded. This allows for the simultaneous handling of multiple pressure blocks, reducing the number of times pressure blocks need to be picked up or placed, thus reducing wasted time and the risk of plate damage, thereby improving overall production efficiency and yield. In summary, this fixture can simultaneously handle multiple pressure blocks, significantly improving production efficiency, reducing the risk of bipolar plate scratches, and increasing welding efficiency and yield. Furthermore, the fixture is lightweight and easy to operate, effectively reducing labor intensity and improving work efficiency. This fixture has good versatility and adaptability, and can be applied to the welding needs of bipolar plates of different sizes and specifications, making it widely applicable. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a three-dimensional structure of an integrated loading and unloading fixture for laser welding of metal bipolar plates.

[0021] Figure 2 This is a schematic diagram of the main structure of an integrated loading and unloading tooling for laser welding of metal bipolar plates and pressure plates according to this utility model.

[0022] Figure 3 This is a schematic diagram of the left side of the integrated loading and unloading tooling for laser welding of metal bipolar plates and pressure plates according to this utility model.

[0023] Figure 4This is a top view schematic diagram of an integrated loading and unloading fixture for laser welding of metal bipolar plates according to this utility model.

[0024] In the diagram: 1. Upper pressure plate, 2. Quick clamp, 2-1. Pressure head, 2-2. Support, 2-3. Linkage assembly, 3. Sliding bearing, 4. Upper support plate, 5. Side support plate, 6. Tool handle, 7. Mounting rod, 8. Pressure block, 9. Limiting spring, 10. Tool base plate, 10-1. Limiting through hole, 11. Limiting rod. Detailed Implementation

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] This embodiment provides an integrated loading and unloading fixture for a metal bipolar plate laser welding upper pressure plate, such as... Figures 1-4 As shown, the device includes a tooling base plate 10, a fixing device, and a pick-and-place device. The tooling base plate has multiple limiting through holes 10-1, and the cross-sectional area of ​​each limiting through hole 10-1 is smaller than the area of ​​the pressure block. Multiple fixing devices are connected to the tooling base plate 10. Multiple pick-and-place devices are also connected to the tooling base plate 10 and the fixing devices to achieve the clamping and releasing of the bipolar plate. The pick-and-place device includes a quick-release clamp 2, an upper pressure plate 1, and a limiting... The positioning mechanism and the block picking and placing mechanism are as follows: the quick clamp 2 is connected to the fixing device, and the connection between the fixing device and the quick clamp 2 is provided with a pressure head through hole. The pressure head 2-1 of the quick clamp 2 passes through the pressure head through hole and is connected to the upper pressure plate 1. The lower end of the limiting mechanism is connected to the tooling base plate 10, and the upper end of the limiting mechanism is connected to the upper pressure plate 1. The upper end of the block picking and placing mechanism is connected to the upper pressure plate 1, and the lower end of the block picking and placing mechanism is set at the limiting through hole 10-1. The block picking and placing mechanism is used to pick up or place the block.

[0028] It should be noted that, as a preferred embodiment, such as Figure 1 As shown, the fixing device includes two side support plates 5 and an upper support plate 4. The lower ends of both side support plates 5 are connected to the upper surface of the tooling base plate 10, providing stable support force. The upper sidewalls of the two side support plates 5 are respectively connected to the left and right ends of the upper support plate 4. The upper support plate 4 is provided with pressure head through holes. More preferably, both side support plates 5 are bolted to the upper support plate 4. The bolted connection method is stable and reliable, convenient for disassembly and assembly, and can ensure the structural rigidity of the fixing device, thereby improving the overall stability and durability of the tooling.

[0029] It should be noted that, as a preferred embodiment, such as Figure 1 As shown, the quick-release caliper 2 also includes a support 2-2 and a connecting rod assembly 2-3. The support 2-2 is connected to the upper surface of the upper support plate 4 and is located radially outside the pressure head through hole. The support 2-2 and the pressure head through hole are provided with through holes at corresponding positions. The pressure head 2-1 passes through the through hole and the pressure head through hole and is connected to the upper pressure plate 1, which facilitates the precise positioning and installation of the pressure head 2-1. The connecting rod assembly 2-3 is connected to the pressure head 2-1 and the support 2-2. The pressure head 2-1 is pressed down or raised up through the connecting rod assembly 2-3. The connecting rod assembly 2-3 can realize the stable pressing down and raising up of the pressure head 2-1 and saves effort in operation.

[0030] It should be noted that, as a preferred embodiment, such as Figures 1-4 As shown, the limiting mechanism includes a sliding bearing 3, a limiting rod 11, and a limiting spring 9. The upper pressure plate 1 is provided with a limiting through hole, the sliding bearing 3 is set in the limiting through hole, the limiting rod 11 passes through the sliding bearing 3, and the lower end of the limiting rod 11 is connected to the tooling base plate 10. The limiting spring 9 is sleeved on the radially outer side of the limiting rod 11, providing elastic support and reset function. When the pressure head 2-1 is raised and drives the upper pressure plate 1 to be raised, the limiting spring 9 is in a natural state. When the pressure head 2-1 is pressed down and drives the upper pressure plate 1 to be pressed down, the limiting spring 9 is in a compressed state.

[0031] It should be noted that, as a preferred embodiment, such as Figures 1-4As shown, the block picking and placing mechanism includes a mounting rod 7 and a magnet 8. The upper end of the mounting rod 7 is connected to the lower surface of the upper pressure plate 1, and the lower end of the mounting rod 7 is connected to the upper surface of the magnet 8. The mounting rod 7 serves to connect and transmit pressure. The magnet 8 is located at the limiting through hole 10-1. When the connecting rod assembly 2-3 drives the pressure head 2-1 to press down, the pressure head 2-1 drives the upper pressure plate 1 to press down synchronously. The upper pressure plate 1 drives the multiple magnets 8 connected to it to press down synchronously, and the magnets 8 pick up the block. When the connecting rod assembly 2-3 drives the pressure head 2-1 to lift up, the pressure head 2-1 drives the upper pressure plate 1 to lift up synchronously. The upper pressure plate 1 drives the multiple magnets 8 connected to it to lift up synchronously. Since the area of ​​the block is smaller than the cross-sectional area of ​​the limiting through hole 10-1, the block separates from the magnet 8 under the action of the limiting through hole 10-1. This fixture allows multiple pressure blocks to be removed and placed simultaneously, avoiding the need to remove and place multiple pressure blocks one by one in the traditional welding process, thus avoiding the problem of long removal and placement time, shortening the removal and placement time, and improving the efficiency of welding bipolar plates. At the same time, the magnet 8 can keep the pressure blocks in a horizontal position, which can prevent the pressure blocks from scratching the bipolar plates.

[0032] It should be noted that, as a preferred embodiment, there are multiple limiting mechanisms and multiple pressing block picking and placing mechanisms. In actual use, the number and distribution of the fixing device, picking and placing device, limiting mechanism, and pressing block picking and placing mechanism are adjusted according to the actual number and distribution of the pressing blocks. More preferably, in this embodiment, such as Figures 1-4 As shown, there are two fixing devices, two picking and placing devices, two upper pressure plates 1, four limiting mechanisms, and four pressing block picking and placing mechanisms. Specifically, each upper pressure plate 1 is connected to two magnets 8. When the pressing head 2-1 drives the upper pressure plate 1 to lift or press down, the upper pressure plate 1 can synchronously drive the magnets 8 connected to it to lift or press down, thereby completing the placement or picking of the pressing block.

[0033] It should be noted that, as a preferred embodiment, the upper surface of the tooling base plate 10 is connected to multiple tooling handles 6, which facilitates the operator's handling and movement of the tooling. More specifically, there can be two tooling handles 6, which allows for more balanced force distribution during handling and more stable operation. In addition, the tooling base plate 10, side support plate 5, upper support plate 4, and tooling handles 6 can be made of aluminum alloy, which can reduce the overall weight of the tooling and make it easier for the operator to use.

[0034] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A metal bipolar plate laser welding upper plate integration taking and placing tool, characterized in that, include The tooling base plate (10) is provided with multiple limiting through holes (10-1), and the cross-sectional area of ​​each limiting through hole (10-1) is smaller than the area of ​​the pressure block; The fixing device is a plurality of fixing devices, and all of the fixing devices are connected to the tooling base plate (10); The device includes multiple picking and placing devices, each connected to the tooling base plate (10) and the fixing device. Each picking and placing device includes a quick clamp (2), an upper pressure plate (1), a limiting mechanism, and a pressing block picking and placing mechanism. The quick clamp (2) is connected to the fixing device. The fixing device and the quick clamp (2) are connected by a pressure head through hole. The pressure head (2-1) of the quick clamp (2) passes through the pressure head through hole and is connected to the upper pressure plate (1). The lower end of the limiting mechanism is connected to the tooling base plate (10), and the upper end of the limiting mechanism is connected to the upper pressure plate (1). The upper end of the pressing block picking and placing mechanism is connected to the upper pressure plate (1), and the lower end of the pressing block picking and placing mechanism is located at the limiting through hole (10-1). The pressing block picking and placing mechanism is used to pick up or place the pressing block.

2. The laser welding upper plate integration pick-and-place tool for metal bipolar plates according to claim 1, characterized in that, The fixing device includes a side support plate (5) and an upper support plate (4). There are two side support plates (5). The lower ends of the two side support plates (5) are connected to the upper surface of the tooling base plate (10). The upper side walls of the two side support plates (5) are respectively connected to the left and right ends of the upper support plate (4). The upper support plate (4) is provided with the pressure head through hole.

3. The laser welding upper plate integration pick-and-place tool for metal bipolar plates according to claim 2, characterized in that, Both of the side support plates (5) are bolted to the upper support plate (4).

4. The laser welding upper plate integration pick-and-place tool for metal bipolar plates according to claim 3, characterized in that, The quick-release caliper (2) also includes a support (2-2) and a connecting rod assembly (2-3). The support (2-2) is connected to the upper surface of the upper support plate (4), and the support (2-2) is located radially outside the pressure head through hole. The support (2-2) has a through hole corresponding to the pressure head through hole. The pressure head (2-1) passes through the through hole and the pressure head through hole and is connected to the upper pressure plate (1). The connecting rod assembly (2-3) is connected to the pressure head (2-1) and the support (2-2). The pressure head (2-1) is pressed down or lifted up by the connecting rod assembly (2-3).

5. The integrated loading and unloading fixture for a metal bipolar plate laser welding upper pressure plate according to claim 4, characterized in that, The limiting mechanism includes a sliding bearing (3), a limiting rod (11), and a limiting spring (9). The upper pressure plate (1) is provided with a limiting through hole. The sliding bearing (3) is disposed in the limiting through hole. The limiting rod (11) passes through the sliding bearing (3), and the lower end of the limiting rod (11) is connected to the tooling base plate (10). The limiting spring (9) is sleeved on the radially outer side of the limiting rod (11).

6. The laser welding of metal bipolar plate to upper plate integration pick-and-place tooling of claim 5, wherein, The pressing block taking and placing mechanism includes a mounting rod (7) and a magnet (8). The upper end of the mounting rod (7) is connected to the lower surface of the upper pressure plate (1), and the lower end of the mounting rod (7) is connected to the upper surface of the magnet (8). The magnet (8) is located at the limiting through hole (10-1).

7. The laser welding of metal bipolar plate to upper plate integration pick-and-place tooling of claim 1, wherein, There are multiple limiting mechanisms.

8. The laser welding of metal bipolar plate to upper plate integration pick-and-place tooling of claim 1, wherein, The block handling mechanism comprises multiple components.

9. The laser welding of metal bipolar plate to upper plate integration pick-and-place tooling of claim 1, wherein, A plurality of tool handles (6) are connected to the upper surface of the tool base plate (10).

10. The laser welding of metal bipolar plate to upper plate integration pick-and-place tooling of claim 9, wherein, The tool handles (6) are two.

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