A three-dimensional flexible cold roll forming equipment for a space curve of a lath

Abstract

The present application relates to a kind of plate space curve three-dimensional flexible cold bending forming equipment, it includes support seat, three-dimensional forming component and bistable clamp, three-dimensional forming component is installed on support seat, bistable clamp includes base, guide rod, pressing plate and bistable elastic body, base is connected with the output end of three-dimensional forming component, guide rod is slidably connected with base, one end of guide rod is connected with pressing plate, the other end of guide rod is connected with bistable elastic body, the outer ring of bistable elastic body is fixedly connected with base, bistable elastic body has first state and second state respectively along the direction of the two ends of guide rod protruding;When bistable elastic body is subjected to greater than preset value's pulling force or thrust, i.e. when the bending angle of plate is too large, the acting force of three-dimensional forming component to plate is greater than preset value, bistable elastic body can be switched from first state to second state, pressing plate moves in the direction away from base to release plate, can effectively avoid the fracture of plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material plastic forming, and particularly relates to a three-dimensional flexible cold bending forming equipment for strip space curve. BACKGROUND

[0002] With the development of manufacturing industry, the cold bending forming technology has been widely applied in the field of metal processing. The cold bending forming technology is a processing method which uses mechanical and plastic deformation principle to bend, stretch, press and process metal materials to achieve the required shape and size.

[0003] At present, the fixing of the strip is mostly achieved by using a cylinder to drive a clamping plate to realize the function of clamping the strip.

[0004] However, the clamping force applied to the strip by the existing clamping piece is fixed, and in the process of cold bending forming, if the bending angle is too large, the strip is easy to break. SUMMARY

[0005] Therefore, it is necessary to provide a three-dimensional flexible cold bending forming equipment for strip space curve to solve the problem that the clamping force applied to the strip by the existing clamping piece is fixed, and in the process of cold bending forming, if the bending angle is too large, the strip is easy to break.

[0006] The present application provides a three-dimensional flexible cold bending forming equipment for strip space curve, which comprises a three-dimensional forming assembly and a bistable clamp, the bistable clamp comprises a base, a guide rod, a pressing plate and a bistable elastic body, the base is connected with the output end of the three-dimensional forming assembly, the guide rod is slidingly connected with the base, one end of the guide rod is connected with the pressing plate, the other end of the guide rod is connected with the bistable elastic body, the outer ring of the bistable elastic body is fixedly connected with the base, the bistable elastic body has a first state and a second state which are respectively protruded along the directions of the two ends of the guide rod, when the bistable elastic body is subjected to a pulling force or a pushing force greater than a preset value, it can switch between the first state and the second state to drive the pressing plate connected with the guide rod to move to fix the strip on the base or release the strip on the base.

[0007] Further, the three-dimensional forming assembly comprises a support frame, a longitudinal forming piece, a transverse forming piece and a rotary forming piece, the longitudinal forming piece is fixed on the support frame, the output end of the longitudinal forming piece is connected with the transverse forming piece to drive the transverse forming piece to move in the vertical direction, the output end of the transverse forming piece is connected with the rotary forming piece to drive the rotary forming piece to move in the horizontal direction perpendicular to the strip, and the rotary forming piece is connected with the base to drive the rotary forming piece to rotate circumferentially around the horizontal axis perpendicular to the strip.

[0008] Further, the longitudinal forming member comprises two vertical columns, a first sliding frame, two first motors and two screw rods, two sides of the first sliding frame are slidably connected with the two vertical columns respectively, the two first motors are mounted on the two vertical columns respectively, the output ends of the two first motors are connected with the two screw rods respectively, the two screw rods are arranged through the threaded holes formed on the two sides of the first sliding frame and are rotatably connected with the support frame, and the first sliding frame is connected with the transverse forming member.

[0009] Further, the transverse forming member comprises a second sliding frame slidably connected with the first sliding frame, a second motor, a first gear, a second gear and a straight rack fixed on the first sliding frame, the second motor, the first gear and the second gear are mounted on the second sliding frame, the output end of the second motor is connected with the first gear, the first gear is meshingly connected with the second gear, the second gear is meshingly connected with the straight rack, and the second sliding frame is connected with the rotary forming member.

[0010] Further, the rotary forming member comprises two opposite supports and two pin shafts, the two supports are fixedly connected with the second sliding frame, and opposite ends of the two pin shafts are fixedly connected with the base through the two supports respectively.

[0011] Further, the bistable elastic body comprises a first spring and two second springs oppositely arranged on two sides of the guide rod, one end of the guide rod away from the pressing plate is connected with the base through the first spring, the first spring is coaxially arranged with the guide rod, opposite sides of the two second springs are connected with the base, and opposite sides of the two second springs are connected with the guide rod, when the bistable elastic body is in the first state, the first spring is in the initial state of stretching or compression, the second spring is in the compressed state, and the two second springs are inclined in the direction away from the pressing plate to form a V-shaped convex structure, when the bistable elastic body is in the second state, the first spring is in the stretched state, the second spring is in the compressed state, and the two second springs are inclined in the direction close to the pressing plate to form an inverted V-shaped convex structure.

[0012] Further, the elastic coefficient of the first spring is smaller than that of the second spring.

[0013] Further, the base is a hollow structure, and the first spring and the two second springs are arranged in the base.

[0014] Further, the number of the three-dimensional forming assemblies and the bistable clamps is multiple, and the three-dimensional forming assemblies and the bistable clamps are arranged along the length direction of the slats in sequence.

[0015] Further, a plurality of third springs, two limiting rods and a plurality of connecting rings are further included, the connecting rings are fixedly connected to the two sides of each support frame, the two limiting rods are arranged on the two sides of the support frame and pass through the connecting rings on the corresponding side, the limiting rods are fixedly connected with the connecting rings, and the adjacent connecting rings are connected through the third springs.

[0016] Compared with the prior art, the batten is placed at the position between the pressing plate and the base, the pressing plate is pushed to move to press the batten on the base, at this time, the bistable elastic body protrudes away from the pressing plate and is in the first state, the base is driven to move by the three-dimensional forming assembly to cold bend the batten, if the bending angle is too large, the batten has a risk of breaking, therefore, the bistable elastic body structure is arranged to solve the above problem, specifically, when the bistable elastic body is subjected to a pulling force or a pushing force greater than a preset value, i.e., the bending angle of the batten is too large, the three-dimensional forming assembly applies an acting force on the batten greater than the preset value, the bistable elastic body can be switched from the first state to the second state, and the pressing plate moves away from the base to release the batten, so that the breaking of the batten can be effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A schematic structural view of the overall structure of the batten space curve three-dimensional flexible cold bending forming equipment provided by the embodiment of the present application is provided.

[0018] Figure 2 A schematic structural view of the bistable clamp in the first state in the batten space curve three-dimensional flexible cold bending forming equipment provided by the embodiment of the present application is provided.

[0019] Figure 3 A schematic structural view of the bistable clamp in the second state in the batten space curve three-dimensional flexible cold bending forming equipment provided by the embodiment of the present application is provided.

[0020] Figure 4 A schematic structural view of the three-dimensional forming assembly in the batten space curve three-dimensional flexible cold bending forming equipment provided by the embodiment of the present application is provided.

[0021] Figure 5 A schematic structural view of the action of a plurality of three-dimensional forming assemblies in the batten space curve three-dimensional flexible cold bending forming equipment provided by the embodiment of the present application is provided. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present application are specifically described below in combination with the drawings, wherein the drawings constitute a part of the present application and are used to illustrate the principles of the embodiments of the present application, but are not used to limit the scope of the present application.

[0023] As Figures 1-3As shown, the present application provides a kind of strip space curve three-dimensional flexible cold bending forming equipment, including three-dimensional forming assembly 100 and bistable clamp 200, bistable clamp 200 includes base 210, guide rod 220, pressing plate 230 and bistable elastic body, base 210 is connected with the output end of three-dimensional forming assembly 100, guide rod 220 is slidably connected with base 210, one end of guide rod 220 is connected with pressing plate 230, the other end of guide rod 220 is connected with bistable elastic body, the outer ring of bistable elastic body is fixedly connected with base 210, bistable elastic body has the first state and second state respectively along the direction of the two ends of guide rod 220 protruding, when bistable elastic body is subjected to greater than preset value's pulling force or thrust, it can switch between the first state and the second state, with guide rod 220 connected pressing plate 230 is moved to fixed plate on base 210, or loosen the plate on base 210.

[0024] When implementing, the strip is placed at the position between pressing plate 230 and base 210, and the pressing plate 230 is pushed to move to compress the strip on base 210, at this time, the bistable elastic body protrudes away from the pressing plate 230, in the first state, the three-dimensional forming assembly 100 drives the base 210 to act to cold bend the strip, if the bending angle is too large, the strip has the risk of breaking, therefore, the above problem is solved by setting the bistable elastic body structure, specifically, when the bistable elastic body is subjected to greater than preset value's pulling force or thrust, i.e. the bending angle of the strip is too large, the three-dimensional forming assembly 100 applies the force on the strip greater than the preset value, the bistable elastic body can be switched from the first state to the second state, the pressing plate 230 moves away from the base 210 to loosen the strip, which can effectively avoid the breakage of the strip.

[0025] The three-dimensional forming assembly 100 in the embodiment is used to drive the base 210 to move, so as to realize the cold bending of the strip fixed on the base 210.

[0026] As shown in the figure, Figure 4 In one embodiment, the three-dimensional forming assembly 100 includes support frame 110, longitudinal forming piece 120, transverse forming piece 130 and rotary forming piece 140, the longitudinal forming piece 120 is fixed on the support frame 110, the output end of the longitudinal forming piece 120 is connected with the transverse forming piece 130 to drive the transverse forming piece 130 to move in the vertical direction, the output end of the transverse forming piece 130 is connected with the rotary forming piece 140 to drive the rotary forming piece 140 to move in the horizontal direction perpendicular to the strip, and the rotary forming piece 140 is connected with the base 210 to drive the rotary forming piece 140 to rotate circumferentially with the horizontal direction perpendicular to the strip as the axis.

[0027] The support frame 110 in the embodiment comprises two support blocks and two first connecting rods, and the two support blocks are connected via the two first connecting rods. Of course, the support frame 110 can also adopt other forms of structures instead.

[0028] The longitudinal forming part 120 in the embodiment comprises two vertical columns 121 vertically arranged on the support frame 110, a first sliding frame 122, two first motors 123 and two screw rods 124. The two vertical columns 121 are respectively slidably connected to the two sides of the first sliding frame 122. The two first motors 123 are respectively installed on the two vertical columns 121. The output ends of the two first motors 123 are respectively connected to the two screw rods 124. The two screw rods 124 are arranged through the threaded holes respectively formed on the two sides of the first sliding frame 122 and are rotatably connected to the support frame 110. The first sliding frame 122 is connected to the transverse forming part 130.

[0029] In one embodiment, the first sliding frame 122 comprises two first sliding blocks and two second connecting rods. The two first sliding blocks are connected via the two second connecting rods. The two second sliding blocks are respectively connected to the two vertical columns 121 and the two screw rods 124. Of course, the first sliding frame 122 can also adopt other forms of structures instead.

[0030] The transverse forming part 130 in the embodiment comprises a second sliding frame 131 slidably connected to the first sliding frame 122, a second motor, a first gear, a second gear and a straight rack fixedly arranged on the first sliding frame 122. The second motor, the first gear and the second gear are all installed on the second sliding frame 131. The output end of the second motor is connected to the first gear. The first gear is meshingly connected to the second gear. The second gear is meshingly connected to the straight rack. The second sliding frame 131 is connected to the rotary forming part 140.

[0031] In one embodiment, the second sliding frame 131 comprises a second sliding block and a vertical plate. The second sliding frame 131 is slidably connected to the second connecting rod. The vertical plate is fixedly connected to the bottom of the second sliding block. The third motor, the second gear and the third gear are all installed on the vertical plate. By controlling the meshing ratio of the second gear and the third gear, the sliding speed of the second sliding block can be adjusted. Of course, the second sliding frame 131 can also adopt other forms of structures instead.

[0032] The rotary forming part 140 in the embodiment comprises two brackets 141 oppositely arranged and two pin shafts. The two brackets 141 are fixedly connected to the second sliding frame 131. The opposite ends of the two pin shafts respectively pass through the two brackets 141 and are fixedly connected to the base 210.

[0033] The bistable clamp 200 in the embodiment has a first state and a second state, and can switch between the first state and the second state when the bistable elastic body is subjected to a pulling force or a pushing force greater than a preset value. During the process of clamping the board, if the board is subjected to a greater force, the bistable elastic body will instantaneously switch to another state, thereby releasing the board and ensuring that the board is not damaged.

[0034] In one embodiment, the bistable elastic body includes a first spring 240 and a second spring 250 arranged opposite to both sides of the guide rod 220. The end of the guide rod 220 away from the pressing plate 230 is connected to the base 210 via the first spring 240, and the first spring 240 is coaxially arranged with the guide rod 220. The side of the two second springs 250 opposite to each other is connected to the base 210, and the opposite side of the two second springs 250 is connected to the guide rod 220. When the bistable elastic body is in the first state, the first spring 240 is in a stretched or compressed or initial state, the second spring is in a clamped state, and the two second springs 250 are inclined in a direction away from the pressing plate 230, forming a V-shaped protruding structure. When the bistable elastic body is in the second state, the first spring 240 is in a stretched state, the second spring 250 is in a clamped state, and the two second springs 250 can be inclined in a direction close to the pressing plate 230, forming an inverted V-shaped protruding structure.

[0035] When the bistable elastic body is in the first state, the second spring 250 exerts a downward pushing force on the guide rod 220, and a larger external force needs to be applied to the guide rod 220 to move the guide rod 220 away from the base 210, thereby ensuring that the pressing plate 230 firmly fixes the board on the base 210. When the bistable elastic body is in the second state, the first spring 240 exerts a downward pulling force on the guide rod 220, and the second spring 250 exerts an upward pushing force on the guide rod 220. At this time, the guide rod 220 is in a state of force balance and is stationary. Only a small action needs to be applied to the guide rod 220 to break the above balance and switch to the first state.

[0036] Meanwhile, during the process of switching the bistable elastic body from the first state to the second state, the downward pulling force exerted by the first spring 240 on the guide rod 220 gradually increases, and at the same time, the downward pushing force exerted by the second spring 250 on the guide rod 220 gradually increases, until the second spring 250 is horizontal. At this time, the force exerted by the second spring 250 on the guide rod 220 in the vertical direction is zero, and the guide rod 220 continues to move upward. The upward pushing force exerted by the second spring 250 on the guide rod 220 gradually increases until the guide rod 220 is in a state of force balance.

[0037] In one embodiment, the elastic coefficient of the first spring 240 is smaller than the elastic coefficient of the second spring 250, which can reduce the growth rate of the pulling force exerted by the first spring 240 on the guide rod 220.

[0038] In one embodiment, the base 210 is a hollow structure, and the first spring 240 and the two springs are built into the base 210 .

[0039] like Figure 5 As shown, in order to improve production efficiency, in one embodiment, the number of the three-dimensional forming assembly 100 and the bistable clamp 200 are both multiple, and are arranged in sequence along the length direction of the strip.

[0040] In order to adapt to the displacement of the slats along their length during the bending process and to avoid displacement between two adjacent support frames 110 in a direction perpendicular to the slats, this embodiment also includes multiple third springs 111, two limit rods 112 and multiple connecting rings 113. Each support frame 110 is fixedly connected to a connecting ring 113 on both sides. The two limit rods 112 are arranged on both sides of the support frame 110 and pass through the multiple connecting rings 113 on the corresponding sides. The limit rods 112 are fixedly connected to the connecting ring 113, and the adjacent two connecting rings 113 are connected via the third spring 111.

[0041] Compared with the prior art: the slats are placed between the pressure plate 230 and the base 210, and the pressure plate 230 is pushed to move the slats to press them against the base 210. At this time, the bistable elastomer protrudes in the direction away from the pressure plate 230 and is in the first state. The three-dimensional forming component 100 drives the base 210 to move to cold-bend the slats. If the bending angle is too large, there is a risk of the slats breaking. For this reason, the above problem is solved by setting a bistable elastomer structure. Specifically, when the bistable elastomer is subjected to a pulling force or pushing force greater than a preset value, that is, when the bending angle of the slat is too large, the force applied to the slat by the three-dimensional forming component 100 is greater than the preset value, and the bistable elastomer can switch from the first state to the second state. The pressure plate 230 moves in the direction away from the base 210 to loosen the slats, which can effectively avoid the breakage of the slats.

[0042] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A three-dimensional flexible cold-bending forming equipment for slat space curves, characterized in that: include: three-dimensionally formed components; The bistable clamp includes a base, a guide rod, a pressure plate and a bistable elastomer, the base is connected to the output end of the three-dimensional molding component, the guide rod is slidably connected to the base, one end of the guide rod is connected to the pressure plate, the other end of the guide rod is connected to the bistable elastomer, the outer ring of the bistable elastomer is fixedly connected to the base, and the bistable elastomer has a first state and a second state that are respectively protruding along the directions of the two ends of the guide rod. When the bistable elastomer is subjected to a pulling force or a pushing force greater than a preset value, it can switch between the first state and the second state to drive the pressure plate connected to the guide rod to move to fix the slats on the base, or loosen the slats on the base.

2. The three-dimensional flexible cold-bending forming equipment for slat space curves according to claim 1 is characterized in that: The three-dimensional forming assembly includes a support frame, a longitudinal forming part, a transverse forming part and a rotational forming part. The longitudinal forming part is fixed on the support frame, and the output end of the longitudinal forming part is connected to the transverse forming part to drive the transverse forming part to move in the vertical direction. The output end of the transverse forming part is connected to the rotational forming part to drive the movement in the horizontal direction perpendicular to the slats. The rotational forming part is connected to the base to drive the rotational forming part to rotate circumferentially with the horizontal direction perpendicular to the slats as the axis.

3. The three-dimensional flexible cold-bending forming equipment for slat space curves according to claim 2 is characterized in that: The longitudinal forming part includes two columns, a first slide, two first motors and two screws vertically arranged on the support frame. The two sides of the first slide are respectively slidably connected to the two columns, the two first motors are respectively installed on the two columns, the output ends of the two first motors are respectively connected to the two screws, the two screws are arranged through threaded holes opened on both sides of the first slide, and are both rotatably connected to the support frame, and the first slide is connected to the transverse forming part.

4. The three-dimensional flexible cold-bending forming equipment for slat space curves according to claim 3 is characterized in that: The transverse forming part includes a second slide slidably connected to the first slide, a second motor, a first gear, a second gear and a spur rack fixed on the first slide, the second motor, the first gear and the second gear are all installed on the second slide, the output end of the second motor is connected to the first gear, the first gear is meshed with the second gear, the second gear is meshed with the spur rack, and the second slide is connected to the rotating forming part.

5. The three-dimensional flexible cold-bending forming equipment for slat space curves according to claim 4 is characterized in that: The rotary forming part includes two brackets and two pins arranged opposite to each other. The two brackets are fixedly connected to the second slide. The opposite ends of the two pins pass through the two brackets and are fixedly connected to the base.

6. The three-dimensional flexible cold-bending forming equipment for slat space curves according to claim 1 is characterized in that: The bistable elastomer includes a first spring and a second spring relatively arranged on both sides of the guide rod, the end of the guide rod away from the pressure plate is connected to the base via the first spring, the first spring and the guide rod are coaxially arranged, the opposite sides of the two second springs are connected to the base, and the opposite sides of the two second springs are connected to the guide rod. When the bistable elastomer is in the first state, the first spring is in tension or compression or the initial state, the second spring is in a compression state, and the two second springs are inclined in a direction away from the pressure plate to form a V-shaped convex structure. When the bistable elastomer is in the second state, the first spring is in a tension state, the second spring is in a compression state, and the two second springs are inclined in a direction close to the pressure plate to form an inverted V-shaped convex structure.

7. The three-dimensional flexible cold-bending forming equipment for slat space curves according to claim 6 is characterized in that: The elastic coefficient of the first spring is smaller than the elastic coefficient of the second spring.

8. The three-dimensional flexible cold-bending forming equipment for slat space curves according to claim 6 is characterized in that: The base is a hollow structure, and the first spring and the two springs are built in the base.

9. The three-dimensional flexible cold-bending forming equipment for slat space curves according to claim 2, characterized in that: The three-dimensional forming components and the bistable clamps are both in plurality and are arranged in sequence along the length direction of the slats.

10. The three-dimensional flexible cold-bending forming equipment for slat space curves according to claim 9, characterized in that: It also includes multiple third springs, two limit rods and multiple connecting rings. The connecting rings are fixedly connected on both sides of each support frame. The two limit rods are arranged on both sides of the support frame and pass through the multiple connecting rings on the corresponding sides. The limit rods are fixedly connected to the connecting rings, and the adjacent two connecting rings are connected via the third springs.

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