A steel strip bidirectional bending device and method suitable for fuel cell stack

Abstract

The present invention provides a bidirectional bending device and method for a steel belt suitable for a fuel cell stack. The device comprises: a three-dimensional moving mechanism; a steel belt positioning and tightening mechanism arranged on the power output end of the three-dimensional moving mechanism; a steel belt side edge pressing mechanism arranged on the power output end of the three-dimensional moving mechanism and located above the steel belt positioning and tightening mechanism; a steel belt horizontal bending mechanism arranged on the power output end of the three-dimensional moving mechanism and located above the steel belt side edge pressing mechanism. The present invention drives the steel belt positioning and tightening mechanism, the steel belt side edge pressing mechanism and the steel belt horizontal bending mechanism to adjust the three-dimensional position through the three-dimensional moving mechanism, moves to the corresponding positions of different steel belts, hangs the steel belt on the steel belt positioning and tightening mechanism, and pulls it upward and moves toward the side of the fuel cell stack, so that the steel belt is bent to form an L-shaped structure, and the steel belt is laterally pressed and horizontally bent through the steel belt side edge pressing mechanism and the steel belt horizontal bending mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of steel strip bundling for fuel cell stacks, and in particular to a steel strip bidirectional bending device and method suitable for fuel cell stacks. Background Art

[0002] With the rapid development of hydrogen fuel cell application technology, the application fields of hydrogen fuel cell power modules have gradually expanded to electric vehicles, energy storage, communications, mining and other fields. At present, according to the established technical route, multiple single battery modules need to be connected in series or in parallel, arranged and combined together to form a single battery module unit, and steel belts need to be used for binding in this process.

[0003] At present, the existing steel strip bending for fuel cell stacks is basically done manually, and there is no automated bending method. The manual bending of steel strips for fuel cell stacks is labor-intensive, and the bent products have poor consistency and cannot completely fit the outer wall of the electric pusher, so the quality of the products cannot be effectively guaranteed. At the same time, manual operation has low production efficiency and is not suitable for industrial mass production.

[0004] China Publication No. CN 112846805 A discloses an automatic bundling and welding device for fuel cell steel strips, which discloses that the press-fit bundling and welding device realizes bending through the action of the steel strip bending mechanism. The steel strip bending mechanism can drive the connecting rod and the rotating shaft to move through the cylinder extension to drive the bending pressure head to rotate, that is, the bending pressure head can rotate around the center of the rotating shaft, thereby driving the steel strip placed on the bending pressure head to rotate and bend accordingly.

[0005] The steel strip bending mechanism provided in the above technical solution can drive the connecting rod and the rotating shaft to move through the extension and contraction of the cylinder, so as to drive the bending pressure head to rotate to realize the bending of the steel strip. However, the structure of the steel strip bending mechanism is complex, the processing and assembly are difficult, the stability of the bending construction is difficult to ensure, and the cost is high and the maintenance is cumbersome.

[0006] The Chinese publication number is CN214639319U, which discloses a sheet bending device, in which the feeding mechanism includes a three-dimensional moving device and a gripper connected to the driving end of the three-dimensional moving device. The three-dimensional moving device is used to transfer the sheet to be bent obtained by the gripper to the bending mold, and make the edge to be bent of the sheet to be bent contact with the positioning surface of the positioning piece.

[0007] The feeding mechanism provided in the above technical solution realizes the movement of the gripper through a three-dimensional moving device to transport the plate to be bent grasped by the gripper as a whole. It is only used for overall material transportation and does not involve bending. It cannot be used for bending the steel strip of the fuel cell stack. Summary of the invention

[0008] In view of this, the present invention proposes a bidirectional bending device and method for steel strips suitable for fuel cell stacks, aiming to solve the problems of existing stack steel strip bending being a manual operation with high labor intensity, poor product consistency and complex structure of the steel strip bending mechanism.

[0009] On the one hand, the present invention proposes a bidirectional bending device for a steel belt suitable for a fuel cell stack, the device comprising: a three-dimensional moving mechanism; a steel belt positioning and tightening mechanism, which is arranged on the power output end of the three-dimensional moving mechanism and is used for the steel belt to bypass the bottom of the fuel cell stack, and under the condition that at least one of the two steel belt segments on both sides of the fuel cell stack is provided with a tightening hole, the steel belt segment at the tightening hole is clamped to achieve a fixed connection between the steel belt positioning and tightening mechanism and the steel belt segment at the tightening hole, and under the action of the three-dimensional moving mechanism, the steel belt positioning and tightening mechanism pulls the steel belt segment at the tightening hole upward in the direction close to the side of the fuel cell stack, so that the steel belt is shaped An L-shaped structure is formed to match the bottom wall and side wall of the fuel cell stack to achieve one-way bending; a steel belt side clamping mechanism is arranged on the power output end of the three-dimensional moving mechanism and is located above the steel belt positioning and tightening mechanism, and is used to laterally compress the steel belt so that the steel belt segment at the tightening hole extends upward and presses against the side wall of the fuel cell stack; a steel belt horizontal bending mechanism is arranged on the power output end of the three-dimensional moving mechanism and is located above the steel belt side clamping mechanism, and is used to apply a horizontal bending force to the steel belt segment at the tightening hole after the steel belt segment at the tightening hole is pressed against the side wall of the fuel cell stack, so that the steel belt is horizontally bent and extends horizontally along the top wall of the fuel cell stack.

[0010] Furthermore, the above-mentioned steel belt bidirectional bending device suitable for fuel cell stack, the steel belt positioning and tensioning mechanism includes: a tensioning head fixing seat; a floating fixing seat, which is movably arranged on the tensioning head fixing seat along the z-axis, and a force spring is provided between the floating fixing seat and the tensioning head fixing seat; a telescopic pull rod, which is telescopically arranged on the floating fixing seat, and is used for extending and passing into the tensioning hole of the steel belt when the steel belt is positioned, tightened and bent, so as to pull the steel belt upward to tighten, and after the steel belt is tightened, the steel belt applies a tension to the telescopic pull rod, so that the telescopic pull rod and the floating fixing seat float along the z-axis, and under the action of the force spring, the telescopic pull rod applies a constant tension to the steel belt along the z-axis; and after the steel belt is tightened and bent into place, the telescopic pull rod can retract to release the tension and positioning of the steel belt.

[0011] Furthermore, in the above-mentioned steel belt bidirectional bending device suitable for a fuel cell stack, the telescopic pull rod is connected to a telescopic driving member, which is used to drive the telescopic pull rod to extend and penetrate into the tightening hole of the steel belt when the steel belt is positioned and tightened, and to drive the telescopic pull rod to retract after the steel belt is tightened and bent into place to release the positioning of the steel belt.

[0012] Furthermore, the above-mentioned steel strip bidirectional bending device suitable for fuel cell stack, the three-dimensional moving mechanism includes: a steel strip bidirectional bending base; an X-axis bending moving assembly, arranged on the steel strip bidirectional bending base; a Y-axis bending moving assembly, arranged on the X-axis bending moving assembly, for moving along the X-axis with the output end of the X-axis bending moving assembly; a Z-axis bending moving assembly, arranged on the Y-axis bending moving assembly, for moving along the Y-axis with the output end of the Y-axis bending moving assembly, and driving the Z-axis slide arranged on the Z-axis bending moving assembly to move along the Z-axis, thereby realizing the three-dimensional movement of the actuator on the support seat.

[0013] Furthermore, in the above-mentioned steel strip bidirectional bending device suitable for a fuel cell stack, the X-axis bending moving assembly comprises: an X-axis driving motor; an X-axis moving lead screw connected to the X-axis driving motor; an X-axis moving slider slidably arranged on the steel strip bidirectional bending base along the X-axis, and the X-axis moving slider is also connected to the X-axis moving lead screw to form a lead screw slider mechanism for converting the output rotation of the X-axis driving motor into movement of the X-axis moving slider along the X-axis; an X-axis driven slider slidably arranged on the steel strip bidirectional bending base along the X-axis and placed on one side of the X-axis moving slider, the X-axis moving slider and the X-axis driven slider respectively support the two ends of the Y-axis bending moving assembly, and are used to drive the X-axis driven slider and the Y-axis bending moving assembly to move synchronously under the action of the X-axis moving slider.

[0014] Furthermore, in the above-mentioned steel strip bidirectional bending device suitable for a fuel cell stack, the Z-axis bending moving assembly includes: a Z-axis driving motor; a Z-axis moving screw connected to the Z-axis driving motor; a Z-axis slide, which is slidably arranged on the power output end of the Y-axis bending moving assembly along the Z-axis, and the Z-axis slide is also connected to the Z-axis moving screw to form a screw slider mechanism, which is used to convert the output rotation of the Z-axis driving motor into movement of the Z-axis slide relative to the power output end of the Y-axis bending moving assembly along the Z-axis.

[0015] Furthermore, in the above-mentioned steel strip bidirectional bending device suitable for a fuel cell stack, a Z-axis guide rail is provided on the power output end of the Y-axis bending moving assembly to guide the sliding of the Z-axis slide.

[0016] Furthermore, in the above-mentioned steel strip bidirectional bending device suitable for a fuel cell stack, the steel strip side clamping mechanism comprises: a horizontally arranged telescopic cylinder and a clamping member arranged at the telescopic end of the telescopic cylinder.

[0017] Furthermore, in the above-mentioned steel strip bidirectional bending device suitable for a fuel cell stack, the steel strip horizontal bending mechanism comprises: a horizontally arranged telescopic cylinder and a bending head arranged at the telescopic end of the telescopic cylinder.

[0018] On the other hand, the present invention also proposes a steel belt bending method suitable for a fuel cell stack, comprising the following steps: pressing and fixing the fuel cell stack; pre-punching a tightening hole in the steel belt, and passing the steel belt through the bottom of the fuel cell stack, placing the two ends of the steel belt on both sides of the fuel cell stack, respectively, with the tightening hole on one side of the fuel cell stack, and bending the steel belt into an arc structure; clamping the tightening hole of the steel belt on the steel belt positioning and tightening mechanism, and fixing the other end of the steel belt; driving the steel belt positioning and tightening mechanism to adjust its position through a three-dimensional moving mechanism, so that the steel belt positioning and tightening mechanism is lifted upward in a direction close to the side of the fuel cell stack. Pull the steel belt segment at the tightening hole, and bend the other end of the steel belt upward, so that the steel belt forms a U-shaped structure matching the outer contour of the fuel cell stack; press the steel belt segment at the tightening hole by the steel belt side clamping mechanism; apply a horizontal bending force to the steel belt segment at the tightening hole extending upward by the steel belt horizontal bending mechanism, so that the steel belt extends horizontally along the top wall of the fuel cell stack to the second side of the fuel cell stack, and bend the steel belt segment extending horizontally along the top wall of the fuel cell stack downward along the second side wall of the fuel cell stack, so that the steel belt extends downward along the second side wall of the fuel cell stack, so that the steel belt is bent to form a square structure close to the outside of the fuel cell stack.

[0019] The present invention provides a bidirectional bending device and method for a steel belt suitable for a fuel cell stack. The three-dimensional moving mechanism drives the steel belt positioning and tensioning mechanism, the steel belt side clamping mechanism and the steel belt horizontal bending mechanism to adjust the three-dimensional position. In particular, the movement on the Y-axis can realize the position adjustment of the steel belt side clamping mechanism, the steel belt horizontal bending mechanism and the steel belt positioning and tensioning mechanism on the Y-axis, so that they can be moved to the corresponding positions of different steel belts to perform corresponding operations on each steel belt. The movement on the X-axis can realize the adjustment of the spacing between the steel belt side clamping mechanism, the steel belt horizontal bending mechanism, the steel belt positioning and tensioning mechanism and the side of the fuel cell stack. The movement on the Z-axis can realize the adjustment of the height direction of the steel belt side clamping mechanism, the steel belt horizontal bending mechanism and the steel belt positioning and tensioning mechanism, so that the steel belt can be hung on the steel belt positioning and tensioning mechanism through the movements on the X-axis and Z-axis. The steel belt is placed on the tightening mechanism, and is pulled upward and moved toward the side of the fuel cell stack, that is, the steel belt section at the tightening hole is pulled upward in the direction close to the side of the fuel cell stack, so that the steel belt extends upward along the side wall of the fuel cell stack, and the steel belt forms an L-shaped structure matching the bottom wall and the side wall of the fuel cell stack, realizing one-way bending, and the steel belt can be laterally compressed and horizontally bent by the steel belt side clamping mechanism and the steel belt horizontal bending mechanism, so that the steel belt is horizontally bent and extends horizontally along the top wall of the fuel cell stack, reducing the manual workload and mechanized production, so that the quality consistency and qualified rate of the steel belt bending are effectively guaranteed, solving the problem that the bending of the steel belt of the stack is a manual operation with high labor intensity and poor product consistency, and mainly solving some production processes with low efficiency and low production capacity for stack products, greatly improving the quality of the products produced.

[0020] Furthermore, through X, Y, and Z three-axis tensioning and pressing and bending, it can be compatible with battery stack products with different steel strip lengths and sizes to meet product function and performance requirements. At the same time, the mechanism is flexible and stable to use.

[0021] At the same time, the steel belt positioning and tensioning mechanism is clamped in the tensioning hole of the steel belt, and the three-dimensional moving mechanism drives the steel belt positioning and tensioning mechanism to move upward and toward the side of the fuel cell stack, so that one end of the steel belt is fixed, and the other end moves upward and toward the side of the fuel cell stack with the steel belt positioning and tensioning mechanism. The three-dimensional moving mechanism drives the steel belt positioning and tensioning mechanism to move upward and toward the side of the fuel cell stack, so that the bottom of the steel belt can be bent upward along the bottom corner of the fuel cell stack and the steel belt section of the steel belt extends upward along the side wall of the fuel cell stack to complete the bending. Compared with the prior art in which the steel belt is bent by rotating the bending pressure head, the device achieves the bending of the steel belt through the cooperation of the steel belt positioning and tensioning mechanism and the three-dimensional moving mechanism. The mechanical structure is simple and the cost is low, which greatly reduces the cost of the bending mechanism, greatly reduces the complexity of the mechanical structure installation and the complexity of the later maintenance, and at the same time, the bending stability is high, ensuring the consistency of the product bending. In addition, the steel belt positioning and tensioning mechanism and the steel belt horizontal bending mechanism are integrated on the three-dimensional moving mechanism, which can directly realize the bidirectional bending of the steel belt and the integration of bending devices in two directions. It has a compact structure, is easy to transport, is conducive to promotion and use, and has strong economic value.

[0022] In addition, the three-dimensional moving mechanism drives the steel belt positioning and tensioning mechanism, the steel belt side clamping mechanism and the steel belt horizontal bending mechanism to adjust the three-dimensional position, which can not only cooperate with the steel belt positioning and tensioning mechanism to realize the bottom bending of the steel belt, but also realize the synchronous position adjustment of the steel belt side clamping mechanism and the steel belt horizontal bending mechanism, so as to laterally clamp the bent steel belt segment and bend it horizontally again, without the need to adjust the steel belt side clamping mechanism and the steel belt horizontal bending mechanism again, and the one belt and three synchronous movements make the device structure more compact, more conducive to transportation, more conducive to promotion and use, and with greater economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0024] Figure 1 A schematic structural diagram of a steel strip bidirectional bending device provided in an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of another structural direction of the steel strip bidirectional bending device provided by an embodiment of the present invention;

[0026] Figure 3 A front view of a steel strip bidirectional bending device provided in an embodiment of the present invention;

[0027] Figure 4 A rear view of a steel strip bidirectional bending device provided by an embodiment of the present invention;

[0028] Figure 5 A front view of a steel strip bidirectional bending device for a fuel cell stack provided in an embodiment of the present invention before the steel strip is stretched and positioned;

[0029] Figure 6 An axonometric view of a steel strip bidirectional bending device for a fuel cell stack provided in an embodiment of the present invention before the steel strip is stretched and positioned;

[0030] Figure 7 A partial front view of the position of a steel strip after bidirectional bending in a steel strip bidirectional bending device applicable to a fuel cell stack provided in an embodiment of the present invention;

[0031] Figure 8 A partial front view of the position of a steel strip before the steel strip is bent and welded in a steel strip bidirectional bending device for a fuel cell stack provided in an embodiment of the present invention; Fig. 9 A schematic diagram of the structure of the combined connection of the X-axis bending and moving assembly, the Y-axis bending and moving assembly, and the steel strip bidirectional bending base provided in an embodiment of the present invention;

[0032] Fig.10 A top view of the combined connection of the X-axis bending and moving assembly, the Y-axis bending and moving assembly, and the steel strip bidirectional bending base provided in an embodiment of the present invention;

[0033] Fig.11 A front view of the combined connection of the X-axis bending and moving assembly, the Y-axis bending and moving assembly, and the steel strip bidirectional bending base provided in an embodiment of the present invention;

[0034] Fig.12 A schematic diagram of the structure of the combined connection of the Z-axis bending and moving assembly, the steel strip side clamping mechanism, the steel strip horizontal bending mechanism and the steel strip positioning and tightening mechanism provided in an embodiment of the present invention;

[0035] Fig.13 A front view of the combined connection of the Z-axis bending and moving assembly, the steel belt side clamping mechanism, the steel belt horizontal bending mechanism and the steel belt positioning and tightening mechanism provided in an embodiment of the present invention;

[0036] Fig.14 A top view of the combined connection of the Z-axis bending and moving assembly, the steel strip side clamping mechanism, the steel strip horizontal bending mechanism and the steel strip positioning and tensioning mechanism provided in an embodiment of the present invention;

[0037] Fig.15 A side view of the combined connection of the Z-axis bending and moving assembly, the steel strip side edge pressing mechanism, the steel strip horizontal bending mechanism and the steel strip positioning and tensioning mechanism provided in an embodiment of the present invention;

[0038] Fig.16 A schematic structural diagram of a steel belt positioning and tightening mechanism provided in an embodiment of the present invention;

[0039] Fig.17 A side view of a steel belt positioning and tensioning mechanism provided by an embodiment of the present invention;

[0040] Fig.18 A cross-sectional view of a steel belt positioning and tensioning mechanism provided by an embodiment of the present invention;

[0041] Fig.19 A flowchart of a steel strip bending method applicable to a fuel cell stack provided in an embodiment of the present invention;

[0042] Description of the accompanying drawings: 100-steel strip bidirectional bending device, 1-three-dimensional moving mechanism, 11-X-axis bending moving assembly, 111-X-axis driving motor, 112-X-axis moving lead screw, 113-X-axis moving slider, 114-X-axis driven slider, 12-Y-axis bending moving assembly, 121-Y-axis driving motor, 13-Z-axis bending moving assembly, 131-Z-axis driving motor, 132-Z-axis moving lead screw, 133-Z-axis slide seat, 1 34-Z-axis guide rail, 135-transmission part, 14-Z-axis fixed plate, 2-steel belt positioning and tensioning mechanism, 21-tensioning head fixing seat, 22-floating fixing seat, 23-telescopic pull rod, 24-telescopic driving member, 25-force spring, 26-fixed guide rod, 3-steel belt side clamping mechanism, 4-steel belt horizontal bending mechanism, 5-steel belt bidirectional bending base, 6-fuel cell stack, 7-steel belt, 71-tensioning hole, 200-steel belt bending method. DETAILED DESCRIPTION

[0043] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] Device Example:

[0045] See also Figures 1 to 8 , which shows the preferred structure of the steel strip bidirectional bending device for fuel cell stack provided by the embodiment of the present invention. As shown in the figure, the steel strip bidirectional bending device 100 includes: a three-dimensional moving mechanism 1, a steel strip positioning and tightening mechanism 2, a steel strip side clamping mechanism 3 and a steel strip horizontal bending mechanism 4.

[0046] The steel belt positioning and tensioning mechanism 2 is arranged on the power output end of the three-dimensional moving mechanism 1. The steel belt positioning and tensioning mechanism 2 is used to be clamped in the tensioning hole 71 of the steel belt 7 to realize the positioning of the steel belt 7, and can drive the steel belt 7 to be tightened upward into place under the action of the three-dimensional moving mechanism 1, so that the bottom of the steel belt 7 is bent upward and extends upward along the side wall of the fuel cell stack 6. That is to say, when the steel belt 7 bypasses the bottom of the fuel cell stack 6, and at least one of the two steel belt segments on both sides of the fuel cell stack 6 is provided with a tensioning hole 71, the steel belt positioning and tensioning mechanism 2 clamps the steel belt segment at the tensioning hole 71 to realize the fixed connection between the steel belt positioning and tensioning mechanism 2 and the steel belt segment at the tensioning hole 71, and under the action of the three-dimensional moving mechanism 1, the steel belt positioning and tensioning mechanism 2 pulls the steel belt segment at the tensioning hole 71 upward in the direction close to the side of the fuel cell stack 6, so that the steel belt 7 forms an L-shaped structure matching the bottom wall and side wall of the fuel cell stack 6 to realize one-way bending. The steel belt side clamping mechanism 3 is arranged on the power output end of the three-dimensional moving mechanism 1 and is located above the steel belt positioning and tightening mechanism 2, and is used to laterally clamp the steel belt 7 after the steel belt 7 is tightened upward to the right position, so that the steel belt section at the tightening hole 71 extends upward and presses against the side wall of the fuel cell stack 6. The steel belt horizontal bending mechanism 4 is arranged on the power output end of the three-dimensional moving mechanism 1 and is located above the steel belt side clamping mechanism 3, and is used to apply a horizontal bending force to the steel belt section at the tightening hole 71 after the steel belt section at the tightening hole 71 is pressed against the side wall of the fuel cell stack 6, so that the steel belt 7 is horizontally bent and horizontally extended along the top wall of the fuel cell stack 6, completing bidirectional bending.

[0047] Specifically, the steel strip bidirectional bending device may also be provided with a steel strip bidirectional bending base 5 to support the device as a whole. The fixed portion of the three-dimensional moving mechanism 1 may be fixedly mounted on the steel strip bidirectional bending base 5 to adjust the three-dimensional position of the steel strip positioning and tensioning mechanism 2, the steel strip side clamping mechanism 3 and the steel strip horizontal bending mechanism 4. The steel strip positioning and tensioning mechanism 2, the steel strip side clamping mechanism 3 and the steel strip horizontal bending mechanism 4 are arranged on the power output end of the three-dimensional moving mechanism 1 in sequence from bottom to top, and the executive parts of the steel strip positioning and tensioning mechanism 2, the steel strip side clamping mechanism 3 and the steel strip horizontal bending mechanism 4 are all facing the same side (such as Figure 4As shown in the figure, the steel belt 7 is tightened upwards and tightened into place, so that the bottom of the steel belt 7 is bent upwards, i.e., an L-shaped structure is formed. In other words, under the action of the three-dimensional moving mechanism 1, the steel belt positioning and tightening mechanism 2 moves along with the three-dimensional moving mechanism 1 toward the direction close to the side of the fuel cell stack 6 (such as Figure 4 The left side shown in the figure pulls up the steel belt segment at the tightening hole 71, that is, the steel belt positioning and tightening mechanism 2 moves upward and leftward with the three-dimensional moving mechanism 1, thereby driving the steel belt segment on the right side to extend upward and tighten along the right side wall of the fuel cell stack 6, so that the steel belt 7 forms an L-shaped structure matching the bottom wall and side wall of the fuel cell stack 6, realizing one-way bending, that is, the steel belt segment 7 placed on the lower side of the bottom wall of the fuel cell stack 6 is attached to the bottom wall of the fuel cell stack 6, and the steel belt segment at the tightening hole 71 extends upward along the side wall of the fuel cell stack 6, realizing the bending of the right side steel belt segment of the steel belt 7; the steel belt side clamping mechanism 3 and the steel belt horizontal bending mechanism 4 move with the steel belt positioning and tightening mechanism 2 under the action of the three-dimensional moving mechanism 1. The steel belt 7 extending upward along the side wall of the fuel cell stack 6 is laterally compressed by the steel belt side clamping mechanism 3, so that the steel belt 7 extending upward along the side wall of the fuel cell stack 6 is clamped between the fuel cell stack 6 and the steel belt side clamping mechanism 3, so as to realize the compression of the side of the steel belt 7; the height of the actuator of the steel belt horizontal bending mechanism 4 is adapted to the height of the top wall of the fuel cell stack 6, and can be slightly higher than the height of the top wall of the fuel cell stack 6, and the actuator of the steel belt horizontal bending mechanism 4 can apply a horizontal bending force to the steel belt 7 extending upward, so that the steel belt 7 can be horizontally bent under the support limit of the fuel cell stack 6 and the horizontal bending force, and then extend horizontally along the top wall of the fuel cell stack 6 after bending.

[0048] In this embodiment, the movement on the X-axis can realize the adjustment of the spacing between the steel belt side clamping mechanism 3, the steel belt horizontal bending mechanism 4, the steel belt positioning and tensioning mechanism 2 and the side of the fuel cell stack 6, and the movement on the Z-axis can realize the adjustment of the height direction of the steel belt side clamping mechanism 3, the steel belt horizontal bending mechanism 4, and the steel belt positioning and tensioning mechanism 2, so that the steel belt 7 can be hung on the steel belt positioning and tensioning mechanism 2 through the movement on the X-axis and Z-axis, and pulled upward and moved toward the side of the fuel cell stack 6, so that the steel belt extends upward along the side wall of the fuel cell stack 6, and the steel belt side clamping mechanism 3 and the steel belt horizontal bending mechanism 4 perform laterally clamping and horizontally bending on the steel belt 7; the movement on the Y-axis can realize the position adjustment of the steel belt side clamping mechanism 3, the steel belt horizontal bending mechanism 4, and the steel belt positioning and tensioning mechanism 2 on the Y-axis, so as to move to the corresponding positions of different steel belts 7 and perform corresponding operations on each steel belt 7.

[0049] In this embodiment, the driving parts of the steel belt side clamping mechanism 3, the steel belt horizontal bending mechanism 4 and / or the steel belt positioning and tightening mechanism 2 are all telescopic cylinders. Specifically, the actuator of the steel belt positioning and tightening assembly 2 can be a telescopic pull rod 23, which is arranged on the power output end of the three-dimensional moving mechanism 1 in a telescopic manner along the horizontal direction, and the telescopic pull rod 23 can be driven by the cylinder to be extended and retracted so that it can be fixed in the tightening hole 71 of the steel belt 7 and can be retracted from the tightening hole 71 to release the positioning connection of the steel belt 7. The actuator of the steel belt side clamping mechanism 3 can be a clamping member, for example, a vertically arranged clamping plate structure, which is arranged on the power output end of the three-dimensional moving mechanism 1 in a horizontal direction in a position-adjustable manner. In particular, the telescopic cylinder can be horizontally arranged on the power output end of the three-dimensional moving mechanism 1, and the clamping member is arranged at the telescopic end of the telescopic cylinder, so that after the steel belt positioning and tensioning mechanism 2 tightens and bends the steel belt into place, the clamping member is driven by the telescopic cylinder to move horizontally to press against the side wall of the steel belt 7, so that the steel belt is clamped between the clamping member and the side wall of the fuel cell stack 6. The actuator of the steel strip horizontal bending mechanism 4 may be a bending head, for example, a horizontally arranged strip-shaped bending head structure, which is arranged on the power output end of the three-dimensional moving mechanism 1 in a position-adjustable manner along the horizontal direction, and in particular, the telescopic cylinder may be arranged horizontally on the power output end of the three-dimensional moving mechanism 1, and the bending head is arranged at the telescopic end of the telescopic cylinder, so that after the steel strip positioning and tensioning mechanism 2 has tightened and bent the steel strip into place, and the steel strip is clamped between the clamping plate structure and the side wall of the fuel cell stack 6, the bending head is driven to move horizontally by the telescopic cylinder to apply a horizontal bending force to the steel strip, so that the vertically extending steel strip is horizontally bent under the action of the horizontal bending force, and extends horizontally along the top wall of the fuel cell stack 6 under the action of the bending head. Among them, the telescopic cylinder is connected to a solenoid valve, so that the solenoid valve is pneumatically controlled to achieve drive control.

[0050] Continue to see Figure 1 to Figure 2 , Figures 9 to 12 The three-dimensional moving mechanism 1 may include: an X-axis bending moving component 11, a Y-axis bending moving component 12, and a Z-axis bending moving component 13; wherein the Y-axis bending moving component 12 is arranged on the X-axis bending moving component 11, and is used to move along the X-axis with the output end of the X-axis bending moving component 11; the Z-axis bending moving component 13 is arranged on the Y-axis bending moving component 12, and is used to move along the Y-axis with the output end of the Y-axis bending moving component 12, and drives the power output end of the Z-axis bending moving component 13, namely the Z-axis slide 133, to move along the Z-axis, thereby realizing the three-dimensional movement of the actuator on the support seat.

[0051] Specifically, the fixed part of the X-axis bending and moving assembly 11 is fixedly mounted on the steel strip bidirectional bending base 5, and can be used as an X-axis movement drive. The fixed part of the Y-axis bending and moving assembly 12 can be fixedly mounted on the executive part of the X-axis bending and moving assembly 11, that is, the power output end, and can be moved in the X-axis as a whole under the driving action of the X-axis bending and moving assembly 11, and can be driven as a Y-axis motion. The fixed part of the Z-axis bending and moving assembly 13 can be fixedly mounted on the executive part of the Y-axis bending and moving assembly 12, that is, the power output end, and can be moved in the X-axis as a whole under the driving action of the X-axis bending and moving assembly 11, and can be moved in the Y-axis as a whole under the driving action of the Y-axis bending and moving assembly 12, to achieve XY axis movement, and can also be used as a Z-axis motion drive to drive the steel strip side clamping mechanism 3, the steel strip horizontal bending mechanism 4, and the steel strip positioning and tensioning mechanism 2 to move in the Z-axis, and achieve the three-dimensional movement of the steel strip side clamping mechanism 3, the steel strip horizontal bending mechanism 4, and the steel strip positioning and tensioning mechanism 2. In this embodiment, a Z-axis fixed plate 14 may be provided on the power output end of the Y-axis bending moving component 12, which is used to support and fix the Z-axis bending moving component 13. Under the coordinated action of the X-axis bending moving component 11 and the Y-axis bending moving component 12, the Z-axis fixed plate 14 can be moved in the XY axis, that is, the position on the horizontal plane can be adjusted, and the Z-axis bending moving component 13 set on the Z-axis fixed plate 14 can be driven to adjust its position horizontally.

[0052] In this embodiment, the X-axis bending moving component 11 can be a screw slider mechanism; the Y-axis bending moving component 12 can be a linear moving module; the Z-axis bending moving component 13 can be a screw slider mechanism. Of course, the X-axis bending moving component 11, the Y-axis bending moving component 12, and the Z-axis bending moving component 13 can also be other linear module sliders, and there is no limitation on them in this embodiment.

[0053] Continue to see Fig.10The X-axis bending moving assembly 11 includes: an X-axis driving motor 111, an X-axis moving lead screw 112, an X-axis moving slider 113, and an X-axis driven slider 114; wherein the X-axis moving lead screw 112 is connected to the X-axis driving motor 111; the X-axis moving slider 113 is slidably arranged on the steel strip bidirectional bending base 5 along the X-axis, and the X-axis moving slider 113 is also connected to the X-axis moving lead screw 112 to form a lead screw slider mechanism, which is used to convert the output rotation of the X-axis driving motor 111 into the movement of the X-axis moving slider 113 along the X-axis; the X-axis driven slider 114 is slidably arranged on the steel strip bidirectional bending base 5 along the X-axis and is placed on one side of the X-axis moving slider 113, the X-axis moving slider 113 and the X-axis driven slider 114 respectively support the two ends of the Y-axis bending moving assembly 12, and are used to drive the X-axis driven slider 114 and the Y-axis bending moving assembly 12 to move synchronously under the action of the X-axis moving slider 113. Specifically, the X-axis driving motor 111 can be fixedly mounted on the steel strip bidirectional bending base 5, the X-axis moving lead screw 112 is rotatably arranged on the steel strip bidirectional bending base 5 along the X-axis, the X-axis moving lead screw 112 is connected to the X-axis driving motor 111, and can rotate under the driving action of the X-axis driving motor 111; the X-axis moving slider 113 is sleeved on the X-axis moving lead screw 112, and the two form a ball screw structure to convert the rotation of the X-axis moving lead screw 112 into movement of the X-axis moving slider 113 along the X-axis; the X-axis moving slider 113 and the X-axis driven slider 114 are respectively connected to the two ends of the Y-axis bending moving assembly 12, so that under the movement of the X-axis moving slider 113, the X-axis driven slider 114 and the Y-axis bending moving assembly 12 are driven to perform synchronous X-axis movement to achieve position adjustment on the X-axis.

[0054] In this embodiment, the Y-axis bending movement component 12 is a linear module, which is connected to a Y-axis driving motor 121 to drive the linear module to move, thereby achieving Y-axis movement.

[0055] See also Figures 12 to 15 , which shows the preferred structure of the combined connection of the Z-axis bending moving assembly 13, the steel strip side clamping mechanism 3, the steel strip horizontal bending mechanism 4 and the steel strip positioning and tensioning mechanism 2 provided in the embodiment of the present invention. Fig.10 , Figures 12 to 15As shown, the Z-axis bending moving component 13 includes: a Z-axis driving motor 131, a Z-axis moving screw 132 and a Z-axis slide 133; wherein the Z-axis moving screw 132 is connected to the Z-axis driving motor 131; the Z-axis slide 133 is slidably arranged on the power output end of the Y-axis bending moving component 12 along the Z-axis, and the Z-axis slide 133 is also connected to the Z-axis moving screw 132 to form a screw slider mechanism, which is used to convert the output rotation of the Z-axis driving motor 131 into movement of the Z-axis slide 133 relative to the power output end of the Y-axis bending moving component 12 along the Z-axis.

[0056] Specifically, the Z-axis driving motor 131 can be fixedly mounted on the Z-axis fixing plate 14, and the Z-axis slide 133 is slidably arranged on the Z-axis fixing plate 14 along the Z-axis. In this embodiment, a Z-axis guide rail 134 is arranged on the power output end of the Y-axis bending moving assembly 12, that is, a Z-axis guide rail 134 can be arranged on the Z-axis fixing plate 14, and there can be two Z-axis guide rails 134, which can respectively guide the sliding of the Z-axis slide 133 at both ends. The Z-axis moving lead screw 132 is rotatably placed between the two Z-axis guide rails 134, and the Z-axis driving motor 131 is connected to the Z-axis moving lead screw 132 to drive the Z-axis moving lead screw 132 to rotate. The Z-axis slide 133 is sleeved on the Z-axis moving lead screw 132 to form a lead screw slider mechanism to convert the output rotation of the Z-axis driving motor 131 into a reciprocating linear motion of the Z-axis slide 133 along the Z-axis guide rail 134. The Z-axis slide 133 may be an L-shaped support seat, whose vertical support plate is slidably connected to the Z-axis guide rail 134 along the length direction of the Z-axis guide rail 134, the fixed parts of the steel belt side clamping mechanism 3 and the steel belt horizontal bending mechanism 4 may be fixedly mounted on the vertical support plate and placed above the horizontal support plate of the Z-axis slide 133, the steel belt positioning and tensioning mechanism 2 may be placed below the horizontal support plate of the Z-axis slide 133, and the fixed part of the steel belt positioning and tensioning mechanism 2 may be fixedly mounted on the horizontal support plate of the Z-axis slide 133, so as to drive the steel belt side clamping mechanism 3, the steel belt horizontal bending mechanism 4, and the steel belt positioning and tensioning mechanism 2 to perform three-dimensional position adjustment. In this embodiment, the Z-axis drive motor 131 and the Z-axis moving screw 132 may be connected through a transmission member 135 to drive the Z-axis moving screw 132 to rotate. The transmission member 135 may be a synchronous belt to drive the Z-axis moving screw 132 to rotate synchronously with the Z-axis drive motor 131.

[0057] See also Figures 16 to 18 , which shows the preferred structure of the steel belt positioning and tightening mechanism 2 provided in the embodiment of the present invention. Figure 5 , Fig.13 , Figures 16 to 18As shown, the steel belt positioning and tensioning mechanism 2 includes: a tensioning head fixing seat 21, a floating fixing seat 22, a telescopic pull rod 23 and a telescopic driving member 24; wherein, the floating fixing seat 22 is movably arranged on the tensioning head fixing seat 21 along the z-axis, and a force spring 25 is provided between the floating fixing seat 22 and the tensioning head fixing seat 21; the telescopic pull rod 23 is telescopically arranged on the floating fixing seat 22, and is used to extend and penetrate into the tensioning hole 71 of the steel belt 7 when the steel belt is positioned, tightened and bent, so as to pull the steel belt upward and tighten it, and after the steel belt is tightened, the steel belt applies a tension to the telescopic pull rod 23, so that the telescopic pull rod 23 and the floating fixing seat 22 float along the z-axis, and under the action of the force spring 25, the telescopic pull rod 23 applies a constant tension to the steel belt along the z-axis; and after the steel belt is tightened and bent into place, the telescopic pull rod 23 can retract to release the tension and positioning of the steel belt 7.

[0058] Specifically, the tension head fixing seat 21 can be a basic support seat, and its top wall can be fixedly connected to the bottom wall of the horizontal support plate of the Z-axis slide 133 to drive the steel belt positioning and tensioning mechanism 2 to adjust the position in three dimensions as a whole. Among them, the tension head fixing seat 21 is provided with a mounting hole, and the mounting hole is adapted to the floating fixing seat 22. The floating fixing seat 22 is installed in the mounting hole, and the floating fixing seat 22 is arranged in the mounting hole in a manner that it can float up and down along the height direction, i.e., the Z-axis. In this embodiment, in order to improve the stability of the floating seat 22 floating up and down, preferably, the tension head fixed seat 21 is provided with a fixed guide rod 26 which is vertically arranged and extends into the mounting hole, and the floating seat 22 is provided with an oil-free bushing (not shown in the figure), which can be slidably sleeved on the fixed guide rod 26 to guide the floating seat 22 to float up and down, that is, the fixed guide rod 26 and the oil-free bushing cooperate to make the floating seat 22 move only in the up and down direction relative to the tension head fixed seat 21, so that the floating seat 22 and the telescopic pull rod 23 can float up and down. The telescopic drive member 24 can be fixedly installed on the floating seat 22, and the floating seat 22 is provided with a clearance hole, and the telescopic pull rod 23 is arranged at the clearance hole in a telescopic manner, so that it can be extended to the outside of the floating seat 22 to be clamped into the tension hole 71 of the steel belt 7 to achieve the positioning of the steel belt 7, and can also be retracted to the inside of the floating seat 22 to release the positioning of the steel belt 7 and achieve the release of the steel belt 7. At the same time, a force spring 25 is also connected between the tensioning head fixed seat 21 and the floating fixed seat 22 to form a flexible connection. The flexible connection can compensate for the errors caused by processing the pulling hole and the Z-axis displacement. At the same time, when the tensioning head fixed seat 21 moves with the Z-axis slide 133, it can drive the steel belt positioning and tensioning mechanism 2 to move as a whole, and drive the steel belt fixed by the telescopic rod 23 to adjust the position. After the steel belt is lifted upward to a certain position, the steel belt will apply a vertical reaction force to the telescopic rod 23 to make the floating fixed seat 22 float, thereby causing the force spring 25 to deform and apply a force to the floating fixed seat 22. The telescopic rod 23 can adjust the tension applied to the steel belt, so that the tension of each group of steel belts is consistent.

[0059] It can be seen that the telescopic rod 23 is arranged on the floating fixed seat 22 in a telescopic manner, and can be extended to the outside of the floating fixed seat 22 to be fixed to the tension hole 71 of the steel belt 7 to achieve fixed connection of the steel belt segment at the tension hole 71, and can also be retracted to the inside of the floating fixed seat 22 to release the fixation of the steel belt segment at the tension hole 71 to achieve the release of the steel belt 7. At the same time, a force spring 25 is also connected between the tension head fixed seat 21 and the floating fixed seat 22 to form a flexible connection. The flexible connection can compensate for the errors caused by machining the pulling hole and the Z-axis displacement. At the same time, when the tension head fixed seat 21 moves with the Z-axis slide 133, it can drive the steel belt positioning and tensioning mechanism 2, and make the telescopic rod 23 apply a constant tension force on the z-axis to the steel belt.

[0060] In this embodiment, the telescopic pull rod 23 is connected to a telescopic driving member 24, which is used to drive the telescopic pull rod 23 to extend and penetrate into the tensioning hole 71 of the steel belt 7 when the steel belt is positioned, tightened and bent, and drive the telescopic pull rod 23 to retract after the steel belt is tightened and bent in place to release the positioning of the steel belt 7. The telescopic driving member 24 can be a cylinder, and of course can also be other driving members, which are not limited in this embodiment.

[0061] The working principle of the steel strip bidirectional bending device suitable for fuel cell stacks is as follows: Figures 1 to 18 As shown, the fuel cell stack 6 is installed in place, and the steel belt is passed through the bottom of the fuel cell stack 6 to form Figure 5 and Figure 6 The shape shown; the steel belt side clamping mechanism 3, the steel belt horizontal bending mechanism 4 and the steel belt positioning and tensioning mechanism 2 are driven to move to the longitudinal position corresponding to the steel belt, that is, the Y-axis position, through the Y-axis bending moving component 12, and the steel belt side clamping mechanism 3, the steel belt horizontal bending mechanism 4 and the steel belt positioning and tensioning mechanism 2 are driven to move to the tensioning hole 71 of the steel belt 7 through the X-axis bending moving component 11 and the Z-axis bending moving component 13, and the telescopic pull rod 23 is driven to extend through the telescopic driving member 24, so that the telescopic pull rod 2 3 is clamped into the tensioning hole 71 of one steel strip segment of the steel strip 7; similarly, the telescopic pull rod 23 of the steel strip positioning and tensioning assembly of another device, such as another steel strip bidirectional bending device (the two steel strip bidirectional bending devices are arranged opposite to each other), can be clamped into the tensioning hole 71 of another steel strip segment of the steel strip 7, and of course, the other steel strip segment of the steel strip 7 can also be fixed by other methods; the steel strip positioning and tensioning mechanism 2 is driven upward and rightward (relative to the right) by the X-axis bending moving assembly 11 and the Z-axis bending moving assembly 13. Figure 7 The left side of the steel belt 7 is moved to lift the left side of the steel belt 7 upward, tighten the steel belt, and move it toward the fuel cell stack 6, that is, to the right, so that the bottom of the left side of the steel belt 7 is bent and extends upward along the left side wall of the fuel cell stack 6. The steel belt is pressed by the steel belt side clamping mechanism 3 so that the inner frame of the steel belt can be well attached to the outer side of the stack product. The horizontal bending force is applied to the steel belt by the steel belt horizontal bending mechanism 4, so that the steel belt is horizontally bent and extends horizontally along the top wall of the fuel cell stack 6. Similarly, the steel belt positioning and tensioning component of the other steel belt bidirectional bending device will bend upward and leftward (relative to the left) Figure 7 The right side of the steel belt 7 is moved upward to lift the right side of the steel belt 7, tighten the steel belt, and move toward the fuel cell stack 6, that is, to the left, so that the bottom of the right side of the steel belt 7 is bent and extends upward along the right side wall of the fuel cell stack 6, forming Figure 7The shape shown in the figure, of course, can also be bent by other means to the steel belt; by other devices along the right side wall of the fuel cell stack 6 to apply a downward bending force to the steel belt, so that the steel belt can be bent downward along the right side wall of the fuel cell stack 6, so that the welding part of the steel belt 7 is aligned and overlapped, forming Figure 8 The shape shown is formed by pressing the two steel strip heads tightly by a welding pressure head to ensure that the joint of the steel strips is tightly attached and pressed, and finally the two steel strip heads are welded by a welding head to complete the bundling of the first steel strip 7; the operation process at the injured part can also be repeated to continue the installation and bundling of the second, third, and fourth steel strips 7.

[0062] In addition, there can be two devices, which are placed on both sides of the fuel cell stack 6 respectively. The device on one side can pull up, press laterally and horizontally bend one steel section of the steel belt 7, and the device on the other side can pull up and press laterally another steel section of the steel belt 7, and cooperate with other structures or manually bend the horizontally extended steel belt downward, so that the steel belt is bent and bent to form a square structure that is close to the outside of the fuel cell stack 6.

[0063] In summary, the bidirectional bending device for steel strips suitable for fuel cell stacks provided in this embodiment drives the steel strip positioning and tensioning mechanism 2, the steel strip side clamping mechanism 3 and the steel strip horizontal bending mechanism 4 to adjust the three-dimensional position through the three-dimensional moving mechanism 1, especially the movement on the Y-axis can realize the position adjustment of the steel strip side clamping mechanism 3, the steel strip horizontal bending mechanism 4 and the steel strip positioning and tensioning mechanism 2 on the Y-axis, so as to move to the corresponding positions of different steel strips 7 to perform corresponding operations on each steel strip, and the movement on the X-axis can realize the adjustment of the distance between the steel strip side clamping mechanism 3, the steel strip horizontal bending mechanism 4, the steel strip positioning and tensioning mechanism 2 and the side of the fuel cell stack 6, and the movement on the Z-axis can realize the adjustment of the height direction of the steel strip side clamping mechanism 3, the steel strip horizontal bending mechanism 4 and the steel strip positioning and tensioning mechanism 2, so that the steel strip can be hung on the steel strip through the movements on the X-axis and Z-axis. The steel belt is positioned on the tensioning mechanism 2, and is pulled upward and moved toward the side of the fuel cell stack 6, that is, the steel belt section at the tensioning hole 71 is pulled upward in the direction close to the side of the fuel cell stack 6, so that the steel belt extends upward along the side wall of the fuel cell stack 6, and the steel belt 7 forms an L-shaped structure matching the bottom wall and side wall of the fuel cell stack 6 to achieve one-way bending, and the steel belt can be laterally compressed and horizontally bent by the steel belt side clamping mechanism 3 and the steel belt horizontal bending mechanism 4, so that the steel belt is horizontally bent and extends horizontally along the top wall of the fuel cell stack 6, reducing the manual workload and mechanized production, so that the quality consistency and qualified rate of the steel belt bending are effectively guaranteed, solving the problem that the bending of the steel belt of the stack is a manual operation with high labor intensity and poor product consistency, and mainly solving some production processes with low efficiency and low production capacity for stack products, greatly improving the quality of the products produced.

[0064] At the same time, the steel belt positioning and tensioning mechanism 2 is clamped in the tensioning hole 71 of the steel belt 7, and the three-dimensional moving mechanism 1 drives the steel belt positioning and tensioning mechanism 2 to move upward and toward the side of the fuel cell stack 6, so that one end of the steel belt is fixed, and the other end moves upward and toward the side of the fuel cell stack 6 with the steel belt positioning and tensioning mechanism 2. The three-dimensional moving mechanism 1 drives the steel belt positioning and tensioning mechanism 2 to move upward and toward the side of the fuel cell stack 6, so that the bottom of the steel belt can be bent upward along the bottom corner of the fuel cell stack 6 and the steel belt section of the steel belt extends upward along the side wall of the fuel cell stack to complete the bending. Compared with the prior art in which the steel belt is bent by rotating the bending pressure head, the device achieves the bending of the steel belt through the cooperation of the steel belt positioning and tensioning mechanism and the three-dimensional moving mechanism. The mechanical structure is simple and the cost is low, which greatly reduces the cost of the bending mechanism, greatly reduces the complexity of the mechanical structure installation and the complexity of the later maintenance, and at the same time, the bending stability is high, ensuring the consistency of the product bending. In addition, the steel belt positioning and tensioning mechanism 2 and the steel belt horizontal bending mechanism 4 are integrated on the three-dimensional moving mechanism 1, which can directly realize the bidirectional bending of the steel belt and the integration of bending devices in two directions. It has a compact structure, is easy to transport, is conducive to promotion and use, and has strong economic value.

[0065] In addition, the three-dimensional moving mechanism 1 drives the steel belt positioning and tensioning mechanism 2, the steel belt side clamping mechanism 3 and the steel belt horizontal bending mechanism 4 to adjust their three-dimensional positions, which can not only cooperate with the steel belt positioning and tensioning mechanism 2 to realize the bottom bending of the steel belt, but also realize the synchronous position adjustment of the steel belt side clamping mechanism 3 and the steel belt horizontal bending mechanism 4, so as to perform laterally clamping and horizontal bending again on the bent steel belt segment, without the need to adjust the steel belt side clamping mechanism 3 and the steel belt horizontal bending mechanism 4 again, and the one belt and three synchronous movements make the device structure more compact, more conducive to transportation, more conducive to promotion and use, and with stronger economic value.

[0066] Furthermore, through X, Y, and Z three-axis tensioning and pressing and bending, it can be compatible with battery stack products with different steel strip lengths and sizes to meet product function and performance requirements. At the same time, the mechanism is flexible and stable to use.

[0067] Method Example:

[0068] See also Fig.19 , which is a flowchart of a bidirectional bending method for steel strips applicable to a fuel cell stack provided by an embodiment of the present invention. As shown in the figure, the bidirectional bending method 200 of steel strips uses the bidirectional bending device for steel strips applicable to a fuel cell stack to bundle steel strips, and includes the following steps:

[0069] Step S1, pressing and fixing the fuel cell stack.

[0070] Specifically, the fuel cell stack 6 is pressed and fixed to achieve position-limiting support for the fuel cell stack 6 .

[0071] Step S2, pre-punch a tightening hole on the steel belt, and pass the steel belt through the bottom of the fuel cell stack, place the two ends of the steel belt on both sides of the fuel cell stack, and place the tightening hole on one side of the fuel cell stack, and bend the steel belt into an arc structure.

[0072] Specifically, at least one tensioning hole 71 is pre-punched on the steel belt, and the steel belt is passed through the gap between the fuel cell stack 6 and the bottom support seat, and the two ends of the steel belt 7 are respectively placed on both sides of the fuel cell stack 6, the tensioning hole 71 is placed on one side of the fuel cell stack 6, and the steel belt is bent into an arc structure to form Figure 5 Shape shown.

[0073] Step S3, fasten the tensioning hole of the steel belt to the steel belt positioning and tensioning mechanism, and fix the other end of the steel belt.

[0074] Specifically, the Y-axis bending moving component 12 is used to drive the steel belt side clamping mechanism 3, the steel belt horizontal bending mechanism 4 and the steel belt positioning and tensioning mechanism 2 to move to the corresponding longitudinal position of the steel belt, and the X-axis bending moving component 11 and the Z-axis bending moving component 13 are used to drive the steel belt side clamping mechanism 3, the steel belt horizontal bending mechanism 4 and the steel belt positioning and tensioning mechanism 2 to move to the tensioning hole 71 of the steel belt 7; similarly, another steel belt segment of the steel belt 7 can be clamped by the steel belt positioning and tensioning mechanism 2 of another steel belt bidirectional bending device, or it can be fixed by other methods.

[0075] In step S4, the steel belt positioning and tensioning mechanism is driven to adjust its position by a three-dimensional moving mechanism, so that the steel belt positioning and tensioning mechanism pulls the steel belt section at the tensioning hole upward toward the side of the fuel cell stack, and bends the other end of the steel belt upward, so that the steel belt forms a U-shaped structure that matches the outer contour of the fuel cell stack.

[0076] Specifically, the steel belt positioning and tensioning mechanism 2 is driven upward and rightward (relative to the X-axis bending and moving assembly 11 and the Z-axis bending and moving assembly 13). Figure 6 The left side of the steel belt 7 is moved upward to lift the left side of the steel belt 7, tighten the steel belt, and move toward the fuel cell stack 6, that is, to the right, so that the bottom of the left side of the steel belt 7 is bent and along the first side wall of the fuel cell stack 6 (such as Fig.16The steel belt 7 extends upwards to form an L-shaped structure matching the bottom wall and side wall of the fuel cell stack 6. Similarly, another steel belt segment of the steel belt 7 can be clamped by the steel belt positioning and tightening mechanism 2 of another steel belt bidirectional bending device, and the telescopic pull rod 23 is driven to extend by the telescopic driving member 24, so that the telescopic pull rod 23 is clamped into the tightening hole 71 of one steel belt segment of the steel belt 7, and is bent and stretched upwards, so that the steel belt is bent along the second side wall (such as the left side wall) of the fuel cell stack 6. Figure 6 The steel belt 7 extends upward (as shown in the right side wall), and forms a U-shaped structure similar to the outer contour of the fuel cell stack 6. Of course, another steel belt section of the steel belt 7 can also be bent upward in other ways.

[0077] Step S5, pressing the steel belt section at the tensioning hole by means of the steel belt side clamping mechanism.

[0078] Specifically, the telescopic cylinder of the steel belt side clamping mechanism 3 drives its clamping head to move to the right to clamp the steel belt section at the tensioning hole 71, that is, to clamp the steel belt 7, so that the inner frame of the steel belt 7 can be well attached to the first side wall of the fuel cell stack product.

[0079] Step S6, applying a horizontal bending force to the steel belt section at the upward extending tensioning hole through the steel belt horizontal bending mechanism, so that the steel belt extends horizontally along the top wall of the fuel cell stack to the other side of the fuel cell stack, and the steel belt section extending horizontally along the top wall of the fuel cell stack is bent downward along the other side wall of the fuel cell stack, so that the steel belt is bent to form a square structure that is tightly attached to the outside of the fuel cell stack.

[0080] Specifically, a horizontal bending force is applied to the vertically extending steel belt segment by the steel belt horizontal bending mechanism 4, so that the steel belt is horizontally bent and horizontally extended to the right along the top wall of the fuel cell stack 6; a downward bending force can be applied to the steel belt along the second side wall of the fuel cell stack 6 by the steel belt downward bending mechanism, so that the steel belt can bend downward along the second side wall of the fuel cell stack 6, so that the welding parts of the steel belt 7 are aligned and overlapped up and down, so that the steel belt is bent to form a square structure that is close to the outside of the fuel cell stack 6, such as Figure 7 Shape shown.

[0081] In summary, the steel strip bending method suitable for a fuel cell stack provided in this embodiment adopts the above-mentioned steel strip bidirectional bending device to bend the steel strip 7. Since the steel strip bidirectional bending device has the above-mentioned effects, the steel strip bidirectional bending method also has corresponding effects.

[0082] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0083] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A bidirectional bending device for a steel strip suitable for a fuel cell stack, characterized in that: include: Three-dimensional mobile mechanism; A steel belt positioning and tightening mechanism is arranged on the power output end of the three-dimensional moving mechanism, and is used for the steel belt to bypass the bottom of the fuel cell stack, and the steel belt is placed on the two steel belt segments on both sides of the fuel cell stack. Under the condition that at least one of the steel belt segments is provided with a tightening hole, the steel belt segment at the tightening hole is clamped to achieve a fixed connection between the steel belt positioning and tightening mechanism and the steel belt segment at the tightening hole, and under the action of the three-dimensional moving mechanism, the steel belt positioning and tightening mechanism pulls the steel belt segment at the tightening hole upward in a direction close to the side of the fuel cell stack, so that the steel belt forms an L-shaped structure matching the bottom wall and side wall of the fuel cell stack, and achieves one-way bending; A steel belt side clamping mechanism, arranged on the power output end of the three-dimensional moving mechanism and located above the steel belt positioning and tensioning mechanism, is used to laterally clamp the steel belt so that the steel belt section at the tensioning hole extends upward and presses against the side wall of the fuel cell stack; A steel belt horizontal bending mechanism, arranged on the power output end of the three-dimensional moving mechanism and located above the steel belt side pressing mechanism, is used to apply a horizontal bending force to the steel belt segment at the tightening hole after the steel belt segment at the tightening hole is pressed onto the side wall of the fuel cell stack, so that the steel belt is horizontally bent and horizontally extended along the top wall of the fuel cell stack; The steel belt positioning and tightening mechanism comprises: Tension head fixing seat; A floating fixed seat is movably arranged on the tension head fixed seat along the z-axis, and a force spring is arranged between the floating fixed seat and the tension head fixed seat to form a flexible connection to compensate for the error caused by the machining hole and the z-axis displacement; A telescopic pull rod is arranged on the floating fixed seat in a telescopic manner, and is used to extend and penetrate into the tightening hole of the steel belt when the steel belt is positioned, tightened and bent, so as to pull the steel belt upward and tighten it. After the steel belt is tightened, the steel belt applies a tensile force to the telescopic pull rod, so that the telescopic pull rod and the floating fixed seat float along the z-axis, and under the action of the force spring, the telescopic pull rod applies a constant tensile force on the z-axis to the steel belt; and after the steel belt is tightened and bent into place, the telescopic pull rod can retract to release the tightening and positioning of the steel belt.

2. The steel strip bidirectional bending device suitable for a fuel cell stack according to claim 1, characterized in that: The telescopic pull rod is connected to a telescopic driving member, which is used to drive the telescopic pull rod to extend and penetrate into the tightening hole of the steel belt when the steel belt is positioned and tightened, and to drive the telescopic pull rod to retract after the steel belt is tightened and bent into place to release the positioning of the steel belt.

3. The steel strip bidirectional bending device suitable for a fuel cell stack according to claim 1 or 2, characterized in that: The three-dimensional moving mechanism comprises: Steel belt bidirectional bending base; An X-axis bending moving assembly is arranged on the steel strip bidirectional bending base; A Y-axis bending and moving component, arranged on the X-axis bending and moving component, and used for moving along the X-axis with the output end of the X-axis bending and moving component; The Z-axis bending moving component is arranged on the Y-axis bending moving component, and is used to move along the Y-axis with the output end of the Y-axis bending moving component, and drive the power output end arranged on the Z-axis bending moving component to move along the Z-axis, so as to realize the three-dimensional movement of the actuator on the support seat.

4. The steel strip bidirectional bending device suitable for a fuel cell stack according to claim 3, characterized in that: The X-axis bending moving assembly comprises: X-axis drive motor; An X-axis moving lead screw connected to the X-axis driving motor; An X-axis moving slider is slidably arranged on the steel strip bidirectional bending base along the X-axis, and the X-axis moving slider is also connected to the X-axis moving lead screw to form a lead screw slider mechanism for converting the output rotation of the X-axis driving motor into movement of the X-axis moving slider along the X-axis; An X-axis driven slider is slidably arranged on the steel strip bidirectional bending base along the X-axis and is placed on one side of the X-axis moving slider. The X-axis moving slider and the X-axis driven slider respectively support the two ends of the Y-axis bending moving assembly, and are used to drive the X-axis driven slider and the Y-axis bending moving assembly to move synchronously under the action of the X-axis moving slider.

5. The steel strip bidirectional bending device suitable for a fuel cell stack according to claim 3, characterized in that: The Z-axis bending moving assembly comprises: Z-axis drive motor; A Z-axis moving lead screw connected to the Z-axis driving motor; The Z-axis slide is slidably arranged on the power output end of the Y-axis bending and moving component along the Z-axis, and the Z-axis slide is also connected to the Z-axis moving lead screw to form a lead screw slider mechanism for converting the output rotation of the Z-axis drive motor into movement of the Z-axis slide relative to the power output end of the Y-axis bending and moving component along the Z-axis.

6. The steel strip bidirectional bending device suitable for a fuel cell stack according to claim 5, characterized in that: A Z-axis guide rail is provided on the power output end of the Y-axis bending and moving assembly to guide the sliding of the Z-axis slide.

7. The steel strip bidirectional bending device suitable for a fuel cell stack according to claim 1 or 2, characterized in that: The steel belt side edge pressing mechanism comprises: a horizontally arranged telescopic cylinder and a pressing piece arranged at the telescopic end of the telescopic cylinder.

8. The steel strip bidirectional bending device suitable for a fuel cell stack according to claim 1 or 2, characterized in that: The steel strip horizontal bending mechanism comprises: a horizontally arranged telescopic cylinder and a bending head arranged at the telescopic end of the telescopic cylinder.

9. A steel strip bending method suitable for a fuel cell stack, characterized in that: The steel strip bidirectional bending device for a fuel cell stack according to any one of claims 1 to 8 is used to bend the steel strip, and the steel strip bending method comprises the following steps: Pressing and fixing the fuel cell stack; Punch a tensioning hole in the steel belt in advance, and pass the steel belt through the bottom of the fuel cell stack, place the two ends of the steel belt on both sides of the fuel cell stack, and place the tensioning hole on one side of the fuel cell stack, and bend the steel belt into an arc structure; Fix the tensioning hole of the steel belt on the steel belt positioning and tensioning mechanism, and fix the other end of the steel belt; The steel belt positioning and tightening mechanism is driven to adjust its position by the three-dimensional moving mechanism, so that the steel belt positioning and tightening mechanism pulls the steel belt section at the tightening hole upward in the direction close to the side of the fuel cell stack, and bends the other end of the steel belt upward, so that the steel belt forms a U-shaped structure matching the outer contour of the fuel cell stack; The steel belt section at the tensioning hole is compressed by the steel belt side compression mechanism; A horizontal bending force is applied to the steel belt section at the upwardly extending tensioning hole through the steel belt horizontal bending mechanism, so that the steel belt extends horizontally along the top wall of the fuel cell stack to the other side of the fuel cell stack, and the steel belt section extending horizontally along the top wall of the fuel cell stack is bent downward along the other side wall of the fuel cell stack, so that the steel belt is bent to form a square structure that is tightly attached to the outside of the fuel cell stack.

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