A laser die-cutting tool for metal bipolar plates

Abstract

The utility model relates to laser cutting field discloses a kind of frock for laser die cutting metal bipolar plate, including substrate, for carrying metal bipolar plate;Connecting bottom plate, set in the just below of substrate;Multiple connecting rods, for connecting the substrate with the connecting bottom plate, to form the interval for discharging slag and auxiliary gas between the two;And workpiece support plate, it is set in the middle part of substrate by the connecting rod, for providing support to the metal bipolar plate in the process of laser cutting, still include a compaction mechanism, the compaction mechanism includes: at least one magnet.In the utility model, by adopting the overall frame design of connecting rod series connection substrate and connecting bottom plate, the structure is greatly simplified.It also significantly reduces manufacturing cost, effectively solves the problem of expensive stamping die in prior art, which is relied on in research and development trial production stage.It avoids the inherent defects of long cycle and high cost of traditional scheme.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting, and in particular to a tooling for laser die-cutting metal bipolar plates. Background Technology

[0002] With the rapid development of hydrogen fuel cell technology, the processing technology of metal bipolar plates, a core component, has become increasingly important. During the product development and trial production phase, rapid iteration in small batches and multiple batches is typically required. Traditional stamping dies, due to their long manufacturing cycles and extremely high costs, are no longer suitable for this demand. Therefore, flexible and efficient laser die-cutting technology has been widely adopted. However, metal bipolar plates are extremely thin and easily deformed under the high temperatures of laser cutting. This necessitates a specialized tooling that can stably and precisely fix and support them during laser processing to ensure the final cutting quality.

[0003] Currently, existing technologies for laser cutting thin metal sheets generally suffer from several shortcomings. On the one hand, the tooling used in the research and development stage is often simple in structure, using traditional methods such as screws or clamps for fixation, resulting in cumbersome workpiece clamping and unloading processes and low loading and unloading efficiency. On the other hand, these simple toolings usually cannot provide effective local support for the cutting path of the thin sheet, and the high heat generated by the laser can easily cause warping of the workpiece edges and deformation of the middle area, seriously affecting the processing accuracy. In addition, if the workpiece is placed directly on the flat plate for processing, it will hinder the downward discharge of molten slag and high-pressure auxiliary gas generated by laser cutting, causing molten slag to splash back and adhere to the back of the workpiece, significantly reducing the cut quality of the finished product. Therefore, a tooling for laser die-cutting metal bipolar plates is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a tooling for laser die-cutting metal bipolar plates, which aims to improve the problems of low workpiece clamping efficiency, poor processing accuracy due to thermal deformation, and slag adhesion affecting the quality of finished products in the prior art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a tooling for laser die-cutting metal bipolar plates, comprising:

[0006] Substrate, used to support the metal bipolar plate;

[0007] A connecting base plate is positioned directly below the base plate;

[0008] Multiple connecting rods are used to connect the substrate and the connecting base plate to form a gap between them for discharging molten slag and auxiliary gas; and

[0009] A workpiece support plate, which is disposed in the middle of the substrate via the connecting rod, is used to provide support for the metal bipolar plate during laser cutting.

[0010] As a further description of the above technical solution:

[0011] It also includes a clamping mechanism, which comprises:

[0012] At least one magnet, and the substrate has magnet mounting holes for receiving and fixing the magnet; and

[0013] An edge clamping plate, the edge clamping plate being made of a magnetically conductive material and configured to press the edge of the metal bipolar plate against the substrate by the magnetic force generated by the magnet.

[0014] As a further description of the above technical solution:

[0015] The outline of the workpiece support plate is a contoured structure that matches the preset laser cutting path.

[0016] As a further description of the above technical solution:

[0017] The substrate is also provided with at least two positioning pin mounting holes; and

[0018] At least two locating pins are installed in the locating pin mounting holes for positioning the metal bipolar plate.

[0019] As a further description of the above technical solution:

[0020] The substrate has a connecting rod mounting hole for mounting the connecting rod.

[0021] As a further description of the above technical solution:

[0022] The connecting base plate has a connecting rod mounting hole 2 for installing the connecting rod.

[0023] As a further description of the above technical solution:

[0024] The workpiece support plate has three connecting rod mounting holes for mounting the connecting rod.

[0025] As a further description of the above technical solution:

[0026] The edge pressure plate is provided with a gripper at the top.

[0027] This utility model has the following beneficial effects:

[0028] 1. This utility model achieves significant structural simplification by employing an integrated frame design that connects the base plate and connecting rod in series. This also significantly reduces manufacturing costs. This solution effectively solves the problem of relying on expensive stamping dies during the research and development trial production stage in existing technologies. It avoids the inherent drawbacks of traditional solutions, such as long development cycles and high costs.

[0029] 2. This utility model introduces a clever contour-following workpiece support plate design. It provides precise, end-to-end support for the laser cutting path. This structure ensures that the thin-plate workpiece remains on the same plane throughout processing, greatly improving the final die-cutting quality. Compared to the common practice in existing technologies where the lack of local support leads to workpiece deformation and affects accuracy, the advantages of this solution are significant.

[0030] 3. This utility model also employs a clamping scheme consisting of magnets and edge pressure plates. The gripper design at the top of the edge pressure plates enables rapid loading and unloading of workpieces. The magnetic adsorption method effectively ensures that the four sides of the die-cut workpiece are fixed without warping, while also securing excess processing material. It completely changes the existing operation method of fixing workpieces using traditional clamps such as screws, solving its shortcomings of cumbersome clamping and low efficiency.

[0031] 4. This invention utilizes a connecting rod to form a suspended structure and combines it with a positioning pin to achieve precise positioning, creating an ideal slag removal environment for laser processing. This design allows laser die-cutting auxiliary gas and molten slag to be discharged without obstruction. It solves the problem in existing technologies where direct processing on a flat surface easily leads to molten slag splashing and contamination of the back of the workpiece. Ultimately, it ensures the cleanliness of the cut. Attached Figure Description

[0032] Figure 1 This is a three-dimensional schematic diagram of a tooling for laser die-cutting metal bipolar plates proposed in this utility model;

[0033] Figure 2 This is a schematic diagram of the substrate of a tooling for laser die-cutting metal bipolar plates proposed in this utility model;

[0034] Figure 3 This is a schematic diagram of the connecting base plate of a tooling for laser die-cutting metal bipolar plates proposed in this utility model;

[0035] Figure 4 This is a schematic diagram of the workpiece support plate of a tooling for laser die-cutting metal bipolar plates proposed in this utility model;

[0036] Figure 5 This is a schematic diagram of the edge pressure plate of a tooling for laser die-cutting metal bipolar plates proposed in this utility model.

[0037] Legend:

[0038] 1. Base plate; 2. Workpiece support plate; 21. Locating pin mounting hole; 22. Magnet mounting hole; 23. Connecting rod mounting hole one; 3. Connecting base plate; 31. Connecting rod mounting hole two; 4. Edge pressure plate; 41. Connecting rod mounting hole three; 5. Connecting rod; 6. Locating pin. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Reference Figure 1 - Figure 5 One embodiment of this utility model provides: a tooling for laser die-cutting metal bipolar plates, comprising:

[0041] Substrate 1, used to support the metal bipolar plate;

[0042] The connecting base plate 3 is positioned directly below the base plate 1;

[0043] Multiple connecting rods 5 are used to connect the substrate 1 and the connecting base plate 3 to form a gap between them for discharging molten slag and auxiliary gas; and

[0044] The workpiece support plate 2, which is disposed in the middle of the substrate 1 via a connecting rod 5, is used to provide support for the metal bipolar plate during laser cutting. It also includes a clamping mechanism, which comprises:

[0045] At least one magnet, and a magnet mounting hole 22 for receiving and fixing the magnet is provided on the substrate 1; and

[0046] An edge pressure plate 4, made of magnetically conductive material, is configured to press the edge of a metal bipolar plate against a substrate 1 using magnetic force generated by a magnet. The workpiece support plate 2 has a contoured structure that matches a preset laser cutting path. At least two positioning pin mounting holes 21 are also provided on the substrate 1.

[0047] At least two locating pins 6 are installed in the locating pin mounting holes 21 for positioning the metal bipolar plate. The base plate 1 has a connecting rod mounting hole 23 for mounting the connecting rod 5. The connecting base plate 3 has a connecting rod mounting hole 31 for mounting the connecting rod 5. The workpiece support plate 2 has a connecting rod mounting hole 41 for mounting the connecting rod 5. The edge pressure plate 4 is provided with a gripper on its top.

[0048] In this laser die-cutting fixture for metal bipolar plates, the core function of the base plate 1 is to support the metal bipolar plate and serve as the mounting platform for the entire fixture. It has magnet mounting holes 22 for accommodating and fixing magnets, positioning pin mounting holes 21 for mounting positioning pins 6, and connecting rod mounting holes 23 for mounting connecting rods 5. The connecting base plate 3 is positioned directly below the base plate 1 and is connected to the connecting rods 5 via connecting rod mounting holes 31, stabilizing the entire fixture structure. Multiple connecting rods 5 connect the base plate 1 and the connecting base plate 3, creating a crucial gap between them to facilitate the smooth discharge of molten slag and auxiliary gas generated during laser cutting. The workpiece support plate 2 is located in the middle of the base plate 1, and its contour is designed to match the laser cutting path, providing precise bottom support for the metal bipolar plate during cutting. Simultaneously, the workpiece support plate 2 also... A connecting rod mounting hole 3 41 is provided for mounting the connecting rod 5. The workpiece support plate 2 is mounted with the connecting rod 5 through the connecting rod mounting hole 3 41, suspending the workpiece support plate 2 in the air to avoid the laser cutting trajectory and facilitate the discharge of laser die-cutting auxiliary gas and slag. As part of the clamping mechanism, the edge pressure plate 4 is made of magnetic material. It relies on the magnetic force generated by the magnet on the substrate 1 to firmly press the edge of the metal bipolar plate onto the substrate 1. At least two positioning pins 6 are installed in the positioning pin mounting hole 21 to install the metal bipolar plate on the substrate 1 and the workpiece support plate 2 through the positioning pins 6. The laser is processed along the reserved gap to facilitate the discharge of laser die-cutting auxiliary gas and slag. Finally, the gripper provided on the top of the edge pressure plate 4 allows the operator to easily and quickly lift the pressure plate, thereby realizing the quick loading and unloading of the workpiece. The edge pressure plate 4 is made of 2mm carbon steel and is used to fix the edge of the bipolar plate workpiece.

[0049] Working Principle: When cutting metal bipolar plates, firstly, during the clamping stage, the operator lifts the gripper on top of the edge clamping plate 4 to raise the entire edge clamping plate 4; then, the metal bipolar plate to be processed is placed on the substrate 1, and the positioning pins 6 extending from the substrate 1 are used to accurately perform initial positioning. After the edge clamping plate 4 is lowered, the magnet inside the substrate 1 generates a strong attraction force, firmly adsorbing the edge clamping plate 4 made of magnetically conductive material, thereby pressing the four edges of the metal bipolar plate tightly onto the substrate 1. Entering the laser cutting stage, the clamping force of the edge clamping plate 4 effectively prevents the thin metal plate from warping due to heat; at the same time, the contoured workpiece support plate 2 located directly below the cutting path provides comprehensive real-time support for the workpiece, ensuring the absolute flatness of the cutting area, thereby ensuring extremely high cutting accuracy and quality; throughout the cutting process, the suspended structure between the substrate 1 and the connecting base plate 3, supported by multiple connecting rods 5, provides a smooth discharge channel for the high-pressure auxiliary gas and the generated molten slag, preventing molten slag from adhering to the back of the workpiece. Finally, during the material handling stage, the operator can easily lift the edge pressure plate 4 with the gripper to conveniently remove the cut and shaped metal bipolar plate. The entire workflow thus achieves a balance of high precision, high quality, and high efficiency.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tooling for laser die-cutting metal bipolar plates, characterized in that, include: Substrate (1) is used to support the metal bipolar plate; The connecting base plate (3) is located directly below the base plate (1); Multiple connecting rods (5) are used to connect the substrate (1) and the connecting base plate (3) to form a gap between them for discharging molten slag and auxiliary gas; and The workpiece support plate (2) is disposed in the middle of the substrate (1) via the connecting rod (5) and is used to provide support for the metal bipolar plate during laser cutting.

2. The tooling for laser die-cutting metal bipolar plates according to claim 1, characterized in that: It also includes a clamping mechanism, which comprises: At least one magnet, and the substrate (1) has a magnet mounting hole (22) for receiving and fixing the magnet; and An edge pressure plate (4) is made of a magnetic material and is configured to press the edge of the metal bipolar plate against the substrate (1) by the magnetic force generated by the magnet.

3. The tooling for laser die-cutting metal bipolar plates according to claim 1, characterized in that: The outline of the workpiece support plate (2) is a contour structure that matches the preset laser cutting path.

4. The tooling for laser die-cutting metal bipolar plates according to claim 1, characterized in that: The substrate (1) is also provided with at least two positioning pin mounting holes (21); and At least two locating pins (6) are installed in the locating pin mounting holes (21) for positioning the metal bipolar plate.

5. The tooling for laser die-cutting metal bipolar plates according to claim 1, characterized in that: The substrate (1) has a connecting rod mounting hole (23) for mounting the connecting rod (5).

6. The tooling for laser die-cutting metal bipolar plates according to claim 1, characterized in that: The connecting base plate (3) is provided with a connecting rod mounting hole 2 (31) for installing the connecting rod (5).

7. The tooling for laser die-cutting metal bipolar plates according to claim 1, characterized in that: The workpiece support plate (2) is provided with a connecting rod mounting hole three (41) for mounting the connecting rod (5).

8. The tooling for laser die-cutting metal bipolar plates according to claim 2, characterized in that: The edge pressure plate (4) is provided with a gripper on its top.

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