Rolling forming machine for conductive bipolar plate production line

Abstract

The rolling forming machine comprises a rack, a pressing mechanism arranged on the rack and an opening and closing mechanism arranged on the rear side of the pressing mechanism, and the pressing mechanism comprises a first pressing roller, a second pressing roller, a third pressing roller and a fourth pressing roller which are sequentially arranged from bottom to top; the opening and closing mechanism comprises a first stress roller, a second stress roller, a first pressing roller, a second pressing roller, a third pressing roller and a fourth pressing roller which are sequentially arranged from bottom to top. The first stress roller and the second stress roller are parallel to each other and rotationally arranged on the rack at the same rotating speed. The distance between the first pressing roller and the second pressing roller and the distance between the third pressing roller and the second pressing roller are adjustable, and the distance between the fourth pressing roller and the third pressing roller is adjustable. The distance between the first stress roller and the second stress roller is adjustable; the device is suitable for continuous production of conductive bipolar plates, the sheet thickness adjusting precision is high, and it is guaranteed that a final product is uniform in thickness and has a flat and smooth surface.

Description

Technical Field

[0001] This application relates to the technical field of sheet production equipment, and particularly relates to a roll forming machine for a conductive bipolar plate production line. Background Art

[0002] Since the PE+graphite conductive bipolar plate is an important component of the battery stack, which is used for current collection and separation of positive and negative electrode solutions, and has characteristics such as high electrical conductivity, good mechanical strength, and good corrosion resistance, it has a wide range of uses and large demand. Currently, the traditional method is to use high-molecular resin PE and conductive carbon black as raw materials, and after high-temperature mixing, the plates are formed by hot pressing through a template. Only one plate of a single specification can be produced at a time, with great limitations, unable to carry out continuous production, low production efficiency, and relatively low precision in adjusting the thickness of the bipolar plate. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of this application is to provide a roll forming machine for a conductive bipolar plate production line.

[0004] To achieve the above purpose, this application adopts the following technical solution: A roll forming machine for a conductive bipolar plate production line is arranged downstream of the extrusion die. The roll forming machine includes: a frame, a pressing mechanism arranged on the frame, and an opening and closing mechanism arranged behind the pressing mechanism. The pressing mechanism includes a first pressing roller, a second pressing roller, a third pressing roller, and a fourth pressing roller arranged in sequence from bottom to top. The opening and closing mechanism includes a first stress roller and a second stress roller arranged in sequence from bottom to top. The first pressing roller, the second pressing roller, the third pressing roller, the fourth pressing roller, the first stress roller, and the second stress roller are rotatably arranged on the frame in parallel and with the same rotation speed. The die orifice of the extrusion die faces the space between the first pressing roller and the second pressing roller. The first pressing roller and the third pressing roller are slidably arranged on the frame to respectively adjust the distance from the second pressing roller. The fourth pressing roller is configured to be able to slide along with the third pressing roller and be able to approach and move away from the third pressing roller. One of the first stress roller and the second stress roller is configured to be able to approach and move away from the other.

[0005] In the above technical solution, further preferably, the pressing mechanism includes a first motor, a second motor, a third motor, and a fourth motor. The first motor is in transmission connection with the first pressing roller to drive the first pressing roller to rotate around its own axis. The second motor is in transmission connection with the second pressing roller to drive the second pressing roller to rotate around its own axis. The third motor is in transmission connection with the third pressing roller to drive the third pressing roller to rotate around its own axis. The fourth motor is in transmission connection with the fourth pressing roller to drive the fourth pressing roller to rotate around its own axis.

[0006] In the above technical solution, further preferably, the roll forming machine further includes a control device, and the control device is in signal connection with the first motor, the second motor, the third motor, and the fourth motor.

[0007] In the above technical solution, further preferably, the opening and closing mechanism includes a fifth motor and a sixth motor. The fifth motor is in transmission connection with the first stress roller to drive the first stress roller to rotate around its own axis. The sixth motor is in transmission connection with the second stress roller to drive the second stress roller to rotate around its own axis. The fifth motor and the sixth motor are in signal connection with the control device.

[0008] In the above technical solution, further preferably, the pressing mechanism further includes a first elevator connected to the first pressing roller in transmission, a second elevator connected to the third pressing roller in transmission, and a pressing cylinder connected to the fourth pressing roller in transmission. The first elevator is used to drive the first pressing roller to approach and move away from the second pressing roller. The second elevator is used to drive the third pressing roller to approach and move away from the second pressing roller. The pressing cylinder is used to drive the fourth pressing roller to approach and move away from the third pressing roller. The first elevator, the second elevator, and the pressing cylinder are in signal connection with the control device.

[0009] In the above technical solution, further preferably, a pair of first sliding bearing seats, a pair of second sliding bearing seats, and a pair of first fixed bearing seats are provided on the frame. The pair of first sliding bearing seats and the pair of second sliding bearing seats are slidably connected to the frame. The first fixed bearing seats are fixedly arranged on the frame. Both ends of the first pressing roller are respectively rotatably connected to the pair of first sliding bearing seats. The first elevator is connected to the pair of first sliding bearing seats. Both ends of the third pressing roller are respectively rotatably connected to the pair of second sliding bearing seats. The second elevator is connected to the pair of second sliding bearing seats. Both ends of the second pressing roller are respectively rotatably connected to the pair of first fixed bearing seats.

[0010] In the above technical solution, further preferably, a support frame is provided on the pair of second sliding bearing seats, both ends of the fourth pressure roller are rotatably connected to a pair of third sliding bearing seats, the pair of third sliding bearing seats are slidably arranged on the support frame, and the pressing cylinder is fixedly arranged on the support frame.

[0011] In the above technical solution, further preferably, the opening and closing mechanism further includes an opening and closing cylinder arranged on the frame, the opening and closing cylinder is used to drive one of the first stress roller and the second stress roller to approach and move away from the other of the first stress roller and the second stress roller, and the opening and closing cylinder is in signal connection with the control device.

[0012] In the above technical solution, further preferably, the opening and closing mechanism further includes a pair of second fixed bearing seats and a pair of fourth sliding bearing seats, the pair of second fixed bearing seats are fixedly arranged on the frame, both ends of the first stress roller are respectively rotatably connected to the pair of second fixed bearing seats; the pair of fourth sliding bearing seats are slidably arranged on the frame, both ends of the second stress roller are respectively rotatably connected to the pair of fourth sliding bearing seats, and the opening and closing cylinder is connected to the pair of fourth sliding bearing seats.

[0013] In the above technical solution, further preferably, the first pressure roller, the second pressure roller, the third pressure roller, the fourth pressure roller, the first stress roller and the second stress roller are all mirror rollers.

[0014] The present application has the following beneficial effects compared with the prior art: The roll forming machine of the present application continuously roll-forms the sheet by rollers with the same rotational speed, is suitable for the continuous production of conductive bipolar plates, the distance between each roller and the adjacent roller can be quickly adjusted, the adjustment accuracy of the sheet thickness is high, and the thickness of the final product is ensured to be uniform and has a flat and smooth surface. Description of the Drawings

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a roll forming machine provided by an embodiment of the present application.

[0016] Figure 2 It is Figure 1 a three-dimensional structural schematic diagram observed from the right front of the roll forming machine in

[0017] Figure 3 It is a structural schematic diagram of the sheet threading through the roll forming machine in Figure 1

[0018] ​Wherein: 100, roll forming machine; 10, frame; 1, wall panel; 101, inclined end face; 102, roller; 103, guide rail; 20, pressing mechanism; 21, first pressing roller; 22, second pressing roller; 23, third pressing roller; 24, fourth pressing roller; 31, first motor; 32, second motor; 33, third motor; 34, fourth motor; 41, first elevator; 42, second elevator; 43, pressing cylinder; 51, first sliding bearing seat; 52, second sliding bearing seat; 53, third sliding bearing seat; 54, first fixed bearing seat; 55, support frame; 30, opening and closing mechanism; 61, first stress roller; 62, second stress roller; 71, fifth motor; 72, sixth motor; 73, opening and closing cylinder; 81, fourth sliding bearing seat; 82, second fixed bearing seat; 40, sliding mechanism; 91, guide rail; 92, slider; 200, extrusion die. Detailed implementation manners

[0019] To describe in detail the technical content, structural features, achieved objectives and effects of the application, the technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementation manners of the invention. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shapes, structures and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment.

[0020] Hereinafter, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0021] The "front", "rear", "left", "right", "upper" and "lower" described in the present application are in accordance with the front, rear, left, right, upper and lower shown in the attached Figure 1 drawings.

[0022] In the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium.

[0023] An embodiment of the present application provides a roll forming machine for a conductive bipolar plate production line. The roll forming machine is arranged downstream of an extrusion die and is used for calendering and cooling and shaping the sheet extruded by the extrusion die.

[0024] As Figure 1 shown, the roll forming machine 100 includes: a frame 10, a pressing mechanism 20 arranged on the frame 10, and an opening and closing mechanism 30 arranged at the rear side of the pressing mechanism 20. The frame 10 has a pair of wallboards 1 arranged oppositely left and right. The pair of wallboards 1 has inclined end faces 101 that gradually incline backward from bottom to top. The pressing mechanism 20 is arranged on the inclined end faces 101, and the opening and closing mechanism 20 is arranged at the rear end of the frame 10.

[0025] As Figure 1 、 2 shown, the pressing mechanism 20 includes a first pressing roller 21, a second pressing roller 22, a third pressing roller 23, and a fourth pressing roller 24 that can be pressed against the third pressing roller 23, which are arranged in sequence from bottom to top along the inclined end face. The first pressing roller 21, the second pressing roller 22, the third pressing roller 23, and the fourth pressing roller 24 are arranged in parallel with each other and are all arranged on the pair of wallboards 1 extending in the left and right directions. The first pressing roller 21, the second pressing roller 22, the third pressing roller 23, and the fourth pressing roller 24 are rotatably arranged on the frame 10 around their own axis lines. The pressing mechanism 20 includes a first motor 31, a second motor 32, a third motor 33, and a fourth motor 34. The first motor 31 is in transmission connection with the first pressing roller 21 to drive the first pressing roller 21 to rotate around its own axis line. The second motor 32 is in transmission connection with the second pressing roller 22 to drive the second pressing roller 22 to rotate around its own axis line. The third motor 33 is in transmission connection with the third pressing roller 23 to drive the third pressing roller 23 to rotate around its own axis line. The fourth motor 34 is in transmission connection with the fourth pressing roller 24 to drive the fourth pressing roller 24 to rotate around its own axis line.

[0026] The pressing mechanism 20 further includes a pair of first sliding bearing seats 51, a pair of second sliding bearing seats 52, a pair of third sliding bearing seats 53, and a pair of first fixed bearing seats 54. The pair of first sliding bearing seats 51 and the pair of second sliding bearing seats 52 are slidably connected to the inclined end face 101 of the frame 10, and the first fixed bearing seats 54 are fixedly arranged on the inclined end face 101. The two end portions of the first pressing roller 21 are respectively rotatably connected to the pair of first sliding bearing seats 51. The first pressing roller 21 is slidably arranged on the frame 10 through the pair of first sliding bearing seats 51, and the distance between the first pressing roller 21 and the second pressing roller 22 is adjusted by approaching and separating from the second pressing roller 22. The two end portions of the second pressing roller 22 are respectively rotatably connected to the pair of first fixed bearing seats 54. The two end portions of the third pressing roller 23 are respectively rotatably connected to the pair of second sliding bearing seats 52. The third pressing roller 23 is slidably arranged on the frame 10 through the pair of second sliding bearing seats 52, and the distance between the third pressing roller 23 and the second pressing roller 22 is adjusted by approaching and separating from the second pressing roller 22.

[0027] A sliding mechanism 40 is arranged between the first sliding bearing seat 51, the second sliding bearing seat 52 and the frame 10. The sliding mechanism 40 includes a guide rail 91 arranged on the inclined end surface 101 and a slider 92 that slides with the guide rail 91. The guide rail 91 gradually tilts backward from bottom to top, and the slider 92 is connected to the bottom of the corresponding sliding bearing seat.

[0028] A support frame 55 is provided on a pair of second sliding bearing seats 52, and a pair of third sliding bearing seats 53 are relatively arranged on the support frame 55, and each third sliding bearing seat 53 can be slidably connected to the support frame 55 along a direction perpendicular to the inclined end surface. The two ends of the fourth pressure roller 24 are respectively rotatably connected to the pair of third sliding bearing seats 53, and the fourth pressure roller 24 can slide back and forth along the inclined end surface with the third pressure roller 23 through the support frame 55, and the fourth pressure roller 24 can approach and move away from the third pressure roller 23 through the pair of third sliding bearing seats 53 to adjust the distance between the fourth pressure roller 23 and the third pressure roller 23.

[0029] The pressing mechanism 20 includes a first lifter 41 for driving the first pressing roller 21 to slide back and forth along the inclined end surface 101, a second lifter 42 for driving the third pressing roller 23 to slide back and forth along the inclined end surface 101, and a pressing cylinder 43 for driving the fourth pressing roller 24 to approach and move away from the third pressing roller 23. The first lifter 41 is connected to a pair of first sliding bearing seats 51 to drive the first sliding bearing seats 51 to move back and forth along the corresponding guide rails 91, the second lifter 42 is connected to a pair of second sliding bearing seats 52 to drive the second sliding bearing seats 52 to move back and forth along the corresponding guide rails 91, and the pressing cylinder 43 is connected to a pair of third sliding bearing seats 53 to drive the third sliding bearing seats 53 to move back and forth in a direction perpendicular to the inclined end surface. The first lifter 41 and the second lifter 42 are both arranged on the frame 10, and the pressing cylinder 43 is arranged on the support frame 55.

[0030] The first lift 41 and the second lift 42 are both screw lifts, each of which includes a lifting motor, a lifting screw and a screw nut. The lifting screw is parallel to the guide rail 91, and the lifting screw is transmission-connected to the lifting motor so as to rotate around its own axis under the drive of the lifting motor. The screw nut is connected to the corresponding sliding bearing seat and is threadedly connected to the lifting screw. When the lifting screw rotates, the screw nut drives the corresponding sliding bearing seat to move back and forth along the lifting screw.

[0031] The opening and closing mechanism 30 includes a first stress roller 61, a second stress roller 62, a fifth motor 71, and a sixth motor 72 arranged successively from bottom to top. The fifth motor 71 is drivingly connected to the first stress roller 61 to drive the first stress roller 61 to rotate about its own axis. The sixth motor 72 is drivingly connected to the second stress roller 62 to drive the second stress roller 62 to rotate about its own axis. In the embodiment of the present application, the first pressure roller 21, the second pressure roller 22, the third pressure roller 23, the fourth pressure roller 24, the first stress roller 61, and the second stress roller 62 are rotatably arranged on the frame 10 in parallel and with the same rotational speed, and each roller is a mirror roller. The rollers with the same rotational speed prevent the sheet from being pulled or wrinkled, ensuring that the sheet is flat and has a smooth surface. The roll forming machine 100 includes a control device (not shown in the figure), and the control device is in signal connection with the first motor 31, the second motor 32, the third motor 33, the fourth motor 34, the fifth motor 71, and the sixth motor 72 to control the rotational speeds output by each motor to be the same.

[0032] Continue to refer to Figure 1 and Figure 2 , the opening and closing mechanism 30 further includes an opening and closing cylinder 73 arranged on the frame 10. The opening and closing cylinder 73 is used to drive one of the first stress roller and the second stress roller 62 to approach and move away from the other of the first stress roller and the second stress roller 62. In the embodiment of the present application, the second stress roller 62 is movably arranged on the frame 10 in the up and down direction, and the opening and closing cylinder 73 is drivingly connected to the second stress roller 62 to drive the second stress roller 62 to move in the up and down direction.

[0033] The opening and closing mechanism 30 further includes a pair of second fixed bearing seats 82 and a pair of fourth sliding bearing seats 81. The pair of second fixed bearing seats 82 are fixedly arranged on the frame 10, and both ends of the first stress roller 61 are respectively rotatably connected to the pair of second fixed bearing seats 82; the pair of fourth sliding bearing seats 81 are slidably arranged on the frame 10, and both ends of the second stress roller 62 are respectively rotatably connected to the pair of fourth sliding bearing seats 81. The opening and closing cylinder 73 is connected to the pair of fourth sliding bearing seats 81 to drive the pair of fourth sliding bearing seats 81 to drive the second stress roller 62 to approach and move away from the first stress roller 61.

[0034] The first elevator 41, the second elevator 42, the pressing cylinder 43, and the opening and closing cylinder 73 are all in signal connection with the control device. The control device controls the operation of each driving member, so as to quickly adjust the distance between each roller and the adjacent roller, make the distances between adjacent pressure rollers equal, ensure that the thickness of the sheet passing around each pressure roller in sequence is uniform, adjust the distance between a pair of stress rollers to press the sheet, remove the internal stress of the sheet, and improve the performance and quality of the sheet.

[0035] The first pressing roller 21, the second pressing roller 22, the third pressing roller 23, and the fourth pressing roller 24 are all connected to the roller temperature controller. The surface temperature of each pressing roller is adjusted by introducing a temperature control medium. The pressing rollers connected to the roller temperature controller reduce the temperature of the passing sheet to preliminarily cool and shape the sheet.

[0036] A plurality of rollers 102 and a guide rail 103 extending in the front-rear direction are further provided at the bottom of a pair of wall panels 1. The cooperation between the rollers 102 and the guide rail 103 enables the frame 10 to move back and forth along the guide rail 103, facilitating the cleaning and maintenance of the roll forming machine 100.

[0037] As Figure 3 shown, the die orifice of the extrusion die 200 is directly opposite the space between the first pressing roller 21 and the second pressing roller 22. There is a first spacing between the first pressing roller 21 and the second pressing roller 22, a second spacing between the second pressing roller 22 and the third pressing roller 23, a third spacing between the fourth pressing roller 24 and the third pressing roller 23, and a fourth spacing between the first stress roller 61 and the second stress roller 62. The sheet extruded from the die orifice bypasses the second pressing roller 22 from the first spacing and enters the second spacing, then bypasses the third pressing roller 23 and enters the third spacing, and then is conveyed downstream of the roll forming machine 100 after passing through the fourth spacing.

[0038] The roll forming machine of the present application continuously rolls and shapes the sheet through rollers with the same rotational speed, and is suitable for the continuous production of conductive bipolar plates. The spacing between each roller and the adjacent roller can be quickly adjusted, with high adjustment accuracy for the sheet thickness, ensuring that the final product has a uniform thickness and a flat and smooth surface.

[0039] The above shows and describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements. The scope of protection required by the present application is defined by the appended claims, the specification, and their equivalents.

Claims

1. A roll forming machine for a conductive bipolar plate production line, which is arranged downstream of the extrusion die, and is characterized in that, The roll forming machine comprises: a frame, a pressing mechanism arranged on the frame and an opening and closing mechanism arranged at the rear side of the pressing mechanism, the pressing mechanism comprises a first pressing roller, a second pressing roller, a third pressing roller and a fourth pressing roller arranged in sequence from bottom to top, the opening and closing mechanism comprises a first stress roller and a second stress roller arranged in sequence from bottom to top, the first pressing roller, the second pressing roller, the third pressing roller, the fourth pressing roller, the first stress roller and the second stress roller are arranged on the frame in parallel and rotate at the same speed, the die opening of the extrusion die faces between the first pressing roller and the second pressing roller; the first pressing roller and the third pressing roller are slidingly arranged on the frame to adjust the distance between them and the second pressing roller respectively, the fourth pressing roller is configured to be able to slide with the third pressing roller and to be able to approach and move away from the third pressing roller; one of the first stress roller and the second stress roller is configured to be able to approach and move away from the other of the first stress roller and the second stress roller.

2. The roll forming machine according to claim 1, characterized in that, The pressing mechanism includes a first motor, a second motor, a third motor and a fourth motor. The first motor is transmission-connected to the first pressing roller to drive the first pressing roller to rotate around its own axis. The second motor is transmission-connected to the second pressing roller to drive the second pressing roller to rotate around its own axis. The third motor is transmission-connected to the third pressing roller to drive the third pressing roller to rotate around its own axis. The fourth motor is transmission-connected to the fourth pressing roller to drive the fourth pressing roller to rotate around its own axis.

3. The roll forming machine according to claim 2, characterized in that, The roll forming machine further comprises a control device, and the control device is signal-connected to the first motor, the second motor, the third motor and the fourth motor.

4. The roll forming machine according to claim 3, characterized in that, The opening and closing mechanism includes a fifth motor and a sixth motor. The fifth motor is connected to the first stress roller for driving the first stress roller to rotate around its own axis. The sixth motor is connected to the second stress roller for driving the second stress roller to rotate around its own axis. The fifth motor and the sixth motor are connected to the control device by signal.

5. The roll forming machine according to claim 3, characterized in that, The laminating mechanism also includes a first elevator connected to the first pressing roller, a second elevator connected to the third pressing roller, and a laminating cylinder connected to the fourth pressing roller. The first elevator is used to drive the first pressing roller to approach and move away from the second pressing roller, the second elevator is used to drive the third pressing roller to approach and move away from the second pressing roller, and the laminating cylinder is used to drive the fourth pressing roller to approach and move away from the third pressing roller. The first elevator, the second elevator and the laminating cylinder are connected to the control device signal.

6. The roll forming machine according to claim 5, characterized in that, A pair of first sliding bearing seats, a pair of second sliding bearing seats and a pair of first fixed bearing seats are arranged on the described frame. The pair of first sliding bearing seats and the pair of second sliding bearing seats are slidably connected to the frame. The first fixed bearing seats are fixedly arranged on the frame. Two ends of the first pressing roller are respectively rotatably connected to the pair of first sliding bearing seats. The first lift is connected to the pair of first sliding bearing seats. Two ends of the third pressing roller are respectively rotatably connected to the pair of second sliding bearing seats. The second lift is connected to the pair of second sliding bearing seats. Two ends of the second pressing roller are respectively rotatably connected to the pair of first fixed bearing seats.

7. The roll forming machine according to claim 6, characterized in that, A support frame is arranged on the pair of second sliding bearing seats. Two ends of the fourth pressing roller are rotatably connected to a pair of third sliding bearing seats. The pair of third sliding bearing seats are slidably arranged on the support frame. The pressing cylinder is fixedly arranged on the support frame.

8. The roll forming machine according to claim 4, characterized in that, The opening and closing mechanism further includes an opening and closing cylinder arranged on the frame. The opening and closing cylinder is used to drive one of the first stress roller and the second stress roller to approach and move away from the other of the first stress roller and the second stress roller. The opening and closing cylinder is in signal connection with the control device.

9. The roll forming machine according to claim 8, characterized in that, The opening and closing mechanism further includes a pair of second fixed bearing seats and a pair of fourth sliding bearing seats. The pair of second fixed bearing seats are fixedly arranged on the frame. Two ends of the first stress roller are respectively rotatably connected to the pair of second fixed bearing seats. The pair of fourth sliding bearing seats are slidably arranged on the frame. Two ends of the second stress roller are respectively rotatably connected to the pair of fourth sliding bearing seats. The opening and closing cylinder is connected to the pair of fourth sliding bearing seats.

10. The roll forming machine according to claim 1, characterized in that, The first pressing roller, the second pressing roller, the third pressing roller, the fourth pressing roller, the first stress roller and the second stress roller are all mirror rollers.

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