Flexible pressing device and welding equipment for electrode net of electrolytic cell

Abstract

The utility model belongs to the technical field of laser welding, and particularly provides a flexible pressing device which comprises a guide assembly and a pressing head assembly. The guide assembly comprises a guide plate and a limiting plate; the limiting plate is arranged at the upper end of the guide plate; the pressing head assembly is connected to the lower portion of the limiting plate through an elastic piece. A vertical guide rail is arranged on the guide plate; the pressing head assembly is connected to the vertical guide rail in a sliding mode. According to the flexible pressing device provided by the utility model, an elastic pressing structure in which the elastic piece is matched with the guide rail is adopted, so that the position can be flexibly adjusted, the edge of the nickel screen is always pressed, and the nickel screen is effectively attached to the polar plate. The utility model further provides welding equipment of the electrolytic bath electrode net comprising the flexible press-fit device, the welding equipment of the electrolytic bath electrode net solves the problems that the welding press-fit of the electrode net is difficult to meet the machining precision and needs manual cooperation, and the machining efficiency and quality of welding of the electrolytic bath nickel net are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser welding, and in particular relates to a flexible pressing device and welding equipment for an electrolytic cell electrode net. Background Art

[0002] With the development of the hydrogen energy industry chain, the hydrogen production link has attracted much attention. The electrolyzer is the core component of the alkaline water hydrogen production device. The electrolyzer is composed of multiple electrodes connected in series, and the structure of the electrode consists of a plate and a positive and negative electrode mesh. The electrode mesh is generally made of nickel wire mesh. The connection between the nickel wire mesh and the plate is welded by welding wire. With the development of the industry, the outer dimensions of the plate are getting larger and thinner. The maximum outer diameter is greater than 2.5m and the thickness is less than 1.5mm. It is easy to deform during the welding process and cannot meet the precision requirements of flatness. In the existing nickel mesh welding process, the nickel mesh and the plate are not tightly fitted, and the fixture cannot effectively ensure the fit. It is usually necessary to use manual pressing to assist in the welding process, which is laborious and time-consuming, affecting the yield. During the welding process, due to the non-concentricity of the fixture and the shaft, and the non-concentricity of the product and the shaft, the weld trajectory needs to be manually adjusted in real time during the welding process. If the welding process does not meet the standards, rust will occur during the use after welding, shortening the service life of the electrolyzer. Utility Model Content

[0003] The utility model aims to overcome the problem that the existing electrode mesh welding and pressing is difficult to meet the processing accuracy, requires manual cooperation and has low processing efficiency.

[0004] To this end, the utility model provides a flexible pressing device, including a guide assembly and a pressure head assembly; the guide assembly includes a guide plate and a limit plate; the limit plate is arranged at the upper end of the guide plate; the pressure head assembly is connected to the bottom of the limit plate through an elastic member; a vertical guide rail is provided on the guide plate; the pressure head assembly is slidably connected to the vertical guide rail.

[0005] Specifically, the above-mentioned pressure head assembly includes a pressure head mounting plate and a rolling bearing; the pressure head mounting plate is connected to the guide assembly; and the rolling bearing is mounted on the pressure head mounting plate via a rotating shaft.

[0006] Specifically, the flexible pressing device further includes an adapter plate; the guide assembly is detachably mounted on the adapter plate.

[0007] The utility model also provides a welding device for an electrolytic cell electrode mesh, comprising a welding head and the above-mentioned flexible pressing device; the flexible pressing device is arranged on one side of the welding head.

[0008] Specifically, a wire feeding assembly is provided on one side of the welding head.

[0009] Specifically, the wire feeding assembly comprises a wire feeding conveyor; one end of the wire feeding conveyor is connected to a wire feeding tube, and the other end is provided with an angle-adjustable wire feeding nozzle.

[0010] Specifically, a weld tracker is provided on the welding head.

[0011] Specifically, the welding head is provided with a side-axis air blowing device; the blowing direction of the side-axis air blowing device points to the laser light-emitting point of the welding head.

[0012] Specifically, the welding head is provided with a monitoring camera for detecting the weld.

[0013] Specifically, the welding head is a swing welding head.

[0014] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0015] The flexible pressing device provided by the utility model has a simple structure, reasonable design, and is easy to install and maintain, and can meet the processing requirements of moving the material to ensure the flatness of the workpiece. The elastic pressing structure using elastic parts and guide rails can flexibly adjust the position to adapt to the welding of the nickel wire mesh when used for electrode mesh welding, and the edge of the nickel wire mesh is always pressed tightly, effectively realizing the fitting of the nickel mesh and the electrode plate, without the need for manual welding and pressing, to avoid poor welding and causing cold welding. In addition, the pressure head adopts a rolling bearing, which can not only ensure a good fit, but also prevent damage to the nickel wire mesh during movement.

[0016] The welding equipment for the electrolytic cell electrode mesh provided by the utility model overcomes the problem that the electrode mesh welding and pressing is difficult to meet the processing accuracy and requires manual cooperation, thereby improving the processing efficiency and quality of the electrolytic cell nickel mesh welding. The weld seam tracking is used to realize the identification and tracking of the nickel mesh weld seam, avoid the problem of deviation of the debugging trajectory by personnel, and improve the welding quality and welding efficiency through weld seam guidance.

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the flexible pressing device provided by the utility model.

[0019] Figure 2 The utility model is a schematic diagram of the structure of the welding equipment for the electrode mesh of the electrolytic cell.

[0020] Figure 3 It is a plan view of a welding device for an electrolytic cell electrode mesh provided by the utility model.

[0021] Explanation of the accompanying drawings: 1. Flexible pressing device; 101. Adapter plate; 1011. Mounting hole; 102. Guide plate; 1021. Vertical guide rail; 103. Limiting plate; 104. Elastic member; 105. Pressure head mounting plate; 106. Rolling bearing; 2. Welding head; 3. Wire feeding assembly; 301. Wire feeding suspension plate; 302. Wire feeding transmission member; 303. Wire feeding tube; 304. Wire feeding nozzle; 4. Weld seam tracker; 5. Side-axis air blowing device; 6. Monitoring camera; 7. Install the main board. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] Reference Figure 1 The utility model provides a flexible pressing device 1, including a guide assembly and a pressure head assembly; the guide assembly includes a guide plate 102 and a limit plate 103; the limit plate 103 is arranged at the upper end of the guide plate 102; the pressure head assembly is connected to the lower side of the limit plate 103 through an elastic member 104; a vertical guide rail 1021 is arranged on the guide plate 102; the pressure head assembly is slidably connected to the vertical guide rail 1021. When in use, the guide assembly is pressed down to make the pressure head assembly fit with the workpiece to be pressed, and the pressure is adjusted by the elastic member 104 between the pressure head assembly and the limit plate 103 of the guide assembly to achieve elastic pressing. The vertical guide rail 1021 arranged on the guide plate 102 ensures that the pressure head assembly moves in a certain direction when it is raised or lowered under the action of the elastic member 104.

[0025] Specifically, the pressure head assembly includes a pressure head mounting plate 105 and a rolling bearing 106; the pressure head mounting plate 105 is respectively connected to the guide plate 102 and the limit plate 103 of the guide assembly; the rolling bearing 106 is mounted on the pressure head mounting plate 105 through a rotating shaft. The pressure head adopts a rolling bearing 106, which can not only ensure a good fit of the workpiece, but also prevent the pressure head assembly from causing damage to the nickel wire mesh during the movement of the welding process. The size and thickness of the rolling bearing 106 can be replaced and adjusted as needed. Generally, the diameter is required to be greater than 10mm, the thickness is greater than 5mm, and the horizontal distance from the center of the rolling bearing 106 to the weld is 5mm-50mm.

[0026] The flexible pressing device 1 further comprises an adapter plate 101; the guide assembly is detachably mounted on the adapter plate 101. The flexible pressing device 1 is mounted on the welding head 2 or other equipment in need thereof via the adapter plate 101.

[0027] Optionally, the adapter plate 101 is provided with a plurality of mounting holes 1011 along the length direction, and the height of the guide assembly is adjusted by fixing the guide assembly to different mounting holes 1011, thereby adjusting the height distance from the pressure head assembly to the nickel mesh product.

[0028] Reference Figure 2-3 The utility model also provides a welding device for an electrolytic cell electrode mesh, comprising a welding head 2 and the above-mentioned flexible pressing device 1; the flexible pressing device 1 is arranged on one side of the welding head 2. When in use, the guide assembly is adjusted so that the pressing head assembly is pressed tightly against the nickel wire mesh to ensure a good fit between the nickel wire mesh and the electrode plate during welding, and the welding head 2 moves to the welding position to guide the laser for welding. The welding head 2 is preferably a swing welding head 2 with a swing effect, and the swing frequency and swing amplitude can be set according to the welding requirements. Generally, the swing diameter is set to 0.1mm-2mm and the swing frequency is 50-300Hz.

[0029] Furthermore, a wire feeding assembly 3 is provided on one side of the welding head 2 to feed the wire during welding to prevent the welding mesh from breaking. The wire material is pure nickel or nickel alloy material, the wire diameter is 0.5mm-2mm, and the wire feeding speed is 5mm / s-30mm / s.

[0030] Specifically, the wire feeding assembly 3 includes a wire feeding conveyor 302; one end of the wire feeding conveyor 302 is connected to the wire feeding tube 303, and the other end is provided with an angle-adjustable wire feeding nozzle 304, and the angle with the normal phase is between 30°-70°. It is ensured that the center of the laser light-emitting point on the product can be reached when feeding the wire. The wire feeding assembly 3 also includes a wire feeding suspension disk 301, and the wire feeding conveyor 302 is installed on the wire feeding suspension disk 301. The wire feeding nozzle 304, the wire feeding tube 303, and the wire feeding conveyor 302 are all replaceable components, which are replaced according to the diameter and / or material of the wire.

[0031] Preferably, a weld tracker 4 is provided on the welding head 2. The weld tracker 4 is fixed to the welding head 2 through a mounting plate and can identify the nickel mesh weld in front of the weld track with an identification accuracy greater than 0.01 mm.

[0032] Furthermore, a side-axis blowing device 5 is provided on the welding head 2, and preferably a pipe blowing device is used, and the blowing direction is directed to the laser light output point of the welding head 2. During the welding process, a protective gas is blown to protect the weld from oxidation during and after welding.

[0033] In a detailed embodiment, a monitoring camera 6 is provided on the welding head 2, which can observe and monitor the weld in real time during the welding process.

[0034] Furthermore, the welding head 2 is connected to a laser collimator, which is connected to a laser via an optical fiber. The laser is used as a light source, and the laser fiber core is 10 μm-100 μm, and the power is 300w-1000w. The focal length of the collimating lens of the welding head 2 is 50mm-150mm, and the focal length of the focusing lens is 100mm-300mm.

[0035] Embodiment 1:

[0036] This embodiment provides a flexible pressing device 1, including an adapter plate 101, a guide assembly and a pressing head assembly.

[0037] The guide assembly includes a guide plate 102 and a limit plate 103 . The limit plate 103 is fixed to the upper end of the guide plate 102 , and together with the guide plate 102 , forms a guide assembly with an inverted L-shaped cross section.

[0038] The pressure head assembly includes a pressure head mounting plate 105 and a rolling bearing 106. A rotating shaft is provided at the lower end of the pressure head mounting plate 105. The rolling bearing 106 is mounted on the rotating shaft and is locked by a spacer and a nut.

[0039] The top of the pressure head mounting plate 105 is connected to the bottom of the limit plate 103 through a spring, and a vertical guide rail 1021 is provided on the side of the guide plate 102 adjacent to the pressure head mounting plate 105. The side wall of the pressure head mounting plate 105 is slidably connected to the vertical guide rail 1021 through a slider.

[0040] A plurality of mounting holes 1011 are provided on the adapter plate 101 along the vertical direction, and the guide plate 102 is detachably mounted on the adapter plate 101 through the connecting piece and the mounting holes 1011 .

[0041] Embodiment 2:

[0042] like Figure 2-3 As shown, this embodiment provides a welding device for an electrolytic cell electrode mesh, including a mounting main board 7, a swing welding head 2, a wire feeding assembly 3 and the flexible pressing device 1 provided in Example 1.

[0043] The welding head 2 is fixed on the mounting main board 7, the adapter plate 101 of the flexible pressing device 1 is fixed on the welding head 2, and the pressing head assembly is located on the left side of the welding head 2; the welding head 2 is provided with a weld tracker 4, a side-axis air blowing device 5 and a monitoring camera 6; the weld tracker 4 is arranged on the front side of the welding head 2; the blowing direction of the side-axis air blowing device 5 points to the laser light emitting point of the welding head 2.

[0044] The wire feeding assembly 3 includes a wire feeding suspension disk 301 and a wire feeding transmission member 302 installed on the wire feeding suspension disk 301; one end of the wire feeding transmission member 302 is connected to the wire feeding tube 303, and the other end is provided with an angle-adjustable wire feeding nozzle 304; the wire feeding suspension disk 301 is fixed on the mounting main board 7, and the wire feeding nozzle 304 is located on the rear side of the welding head 2.

[0045] The following welding steps are used in actual use:

[0046] S1. Prepare the samples. The samples are divided into nickel mesh and electrode plates. The electrode plates are nickel-plated to ensure that there is no oil stain on the surface.

[0047] S2. Use hoisting or manipulator to place the plate and nickel mesh in sequence. Place the nickel mesh at the designated position of the plate and use a contouring jig for pre-pressing to ensure that the nickel mesh is flat.

[0048] S3, adjust the wire feeding assembly 3 so that the angle of the wire feeding tube 303, the height between the wire and the product, the position between the wire and the laser focus, and the wire feeding speed all meet the preset conditions.

[0049] S4, adjusting the rolling bearing 106 to a preset distance position from the welding seam, and adjusting the pressure between the rolling bearing 106 and the nickel mesh to a preset pressure value (between 1N-100N) through the limit plate 103 and the spring.

[0050] S5, the welding head 2 moves to the welding position, and welding is performed in combination with the wire feeding assembly 3 and the weld tracker 4.

[0051] There are two welding methods, A and B. In method A, the weld is located at the inner circle of the nickel mesh edge, and the distance from the edge of the nickel mesh is between 1mm-50mm. It can be an intermittent weld or a full weld. In method B, the weld is located at the edge of the nickel mesh, and it can be an intermittent weld or a full weld.

[0052] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are identical or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A flexible pressing device, characterized in that: The invention comprises a guide assembly and a pressure head assembly; the guide assembly comprises a guide plate (102) and a limit plate (103); the limit plate (103) is arranged at the upper end of the guide plate (102); the pressure head assembly is connected to the lower part of the limit plate (103) through an elastic member (104); a vertical guide rail (1021) is arranged on the guide plate (102); and the pressure head assembly is slidably connected to the vertical guide rail (1021).

2. The flexible pressing device according to claim 1, characterized in that: The pressure head assembly comprises a pressure head mounting plate (105) and a rolling bearing (106); the pressure head mounting plate (105) is connected to the guide assembly; and the rolling bearing (106) is mounted on the pressure head mounting plate (105) via a rotating shaft.

3. The flexible pressing device according to claim 1, characterized in that: It also comprises an adapter plate (101); the guide assembly is detachably mounted on the adapter plate (101).

4. A welding device for an electrolytic cell electrode mesh, characterized in that: It comprises a welding head (2) and a flexible pressing device (1) according to any one of claims 1 to 3; the flexible pressing device (1) is arranged on one side of the welding head (2).

5. The welding equipment for the electrolytic cell electrode mesh according to claim 4, characterized in that: A wire feeding assembly (3) is provided on one side of the welding head (2).

6. The welding equipment for the electrolytic cell electrode mesh according to claim 5, characterized in that: The wire feeding assembly (3) comprises a wire feeding conveyor (302); one end of the wire feeding conveyor (302) is connected to a wire feeding tube (303), and the other end is provided with a wire feeding nozzle (304) with an adjustable angle.

7. The welding equipment for the electrolytic cell electrode mesh according to claim 4, characterized in that: The welding head (2) is provided with a weld tracker (4).

8. The welding equipment for the electrolytic cell electrode mesh according to claim 4, characterized in that: The welding head (2) is provided with a side-axis air blowing device (5); the air blowing direction of the side-axis air blowing device (5) points to the laser light emitting point of the welding head (2).

9. The welding equipment for the electrolytic cell electrode mesh according to claim 4, characterized in that: The welding head (2) is provided with a monitoring camera (6) for detecting the welding seam.

10. The welding equipment for the electrolytic cell electrode mesh according to claim 4, characterized in that: The welding head (2) is a swing welding head (2).

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