Positioning device and method for bending machine

Abstract

The positioning device for the bending machine comprises a bending machine body and a turnover bracket, the bending machine body comprises a bending platform, a pressing plate, a turnover plate, a first bending mold and a second bending mold, the pressing plate is slidably installed on the upper side of the bending platform, a lifting control air cylinder is fixedly installed on the surface of the bending platform, and the turnover plate is slidably installed on the first bending mold. The lifting control air cylinder drives the pressing plate to horizontally move up and down, the overturning plate is rotationally connected with the bending platform, and a bending control air cylinder is rotationally installed on the lower side of the bending platform. According to the positioning device, a to-be-bent plate is pressed on the bending platform through downward movement of the pressing plate, pressing positioning is achieved, the second bending mold is made to approach the first bending mold through overturning of the overturning plate, bending operation is conducted, the overturning bracket is additionally arranged on the side face of the overturning plate, and by means of a positioning pin on the overturning bracket, bending operation is achieved. The to-be-bent plate abuts against the positioning pin, the function of positioning the bending length is achieved, the bending precision is improved, the design structure is simple, and operation is convenient and fast.

Description

Technical Field

[0001] The present invention relates to the technical field of bending machines, and in particular to a positioning device and method for a bending machine. Background Art

[0002] At present, most bending machines need to hold a steel plate by hand and place it on the bending machine for bending during operation. Therefore, during the bending process, due to the lack of an auxiliary positioning device, the steel plate may shift. The prior art discloses an auxiliary positioning device for a bending machine, with the publication number CN210996137U, which includes a bending machine body. A support frame is fixedly connected to the right end of the bending machine body. Two symmetrically arranged sliding grooves are formed in the upper end of the support frame. Sliders are slidably connected in the sliding grooves. A moving rod is fixedly connected to the upper end of the slider. One end of the moving rod close to the bending machine body is fixedly connected with a sliding groove. Strip-shaped grooves are formed in the left and right inner walls of the sliding groove. A sliding square block is slidably connected in the two strip-shaped grooves. A rotating rod is rotatably connected to the outer end of the sliding square block. A clamping groove is formed in the outer end of the rotating rod. A threaded hole is formed in the upper inner wall of the clamping groove. A screw rod is threadedly connected in the threaded hole. The bottom end of the screw rod is rotatably connected with a clamping piece, and the clamping piece is located in the clamping groove. It can be realized that through the auxiliary positioning device, the possibility of the steel plate shifting during the bending process is reduced, thereby improving the yield rate of workpiece production.

[0003] During the actual use of the above solution, the two sides of the bent steel plate will warp, and the moving rod in its auxiliary positioning device will slide reciprocally along the sliding groove, only having the function of preventing the steel plate from shifting, and unable to adjust and position the bending length, which needs to be further improved. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and a positioning device and method for a bending machine are proposed.

[0005] To achieve the above purpose, the present invention adopts the following technical solution: A positioning device for a bending machine includes a bending machine main body and a flipping bracket. The bending main body includes a bending platform, a pressing plate, a flipping plate, a first bending die, and a second bending die. The pressing plate is slidably installed on the upper side of the bending platform. A lifting control cylinder is fixedly installed on the surface of the bending platform, and the lifting control cylinder drives the pressing plate to move up and down. The flipping plate is rotatably connected to the bending platform. A bending control cylinder is rotatably installed on the lower side of the bending platform, and the telescopic end of the bending control cylinder is rotatably connected to the flipping plate. The first bending die is assembled with the pressing plate, and the second bending die is assembled with the flipping plate.

[0006] The flipping bracket is fixedly connected to the flipping plate. A connecting block is slidably mounted on the upper surface of the flipping bracket. A position-adjustable positioning pin is mounted on the surface of the connecting block. A transmission assembly is arranged inside the flipping bracket. The telescopic end of the bending control cylinder drives the connecting block to reciprocate up and down through the transmission assembly.

[0007] Preferably, a chute is formed on the upper surface of the connecting block. A transmission seat is slidably mounted in the chute. A transmission lead screw is rotatably mounted inside the connecting block. The transmission lead screw is threadedly connected to the transmission seat. The positioning pin is threadedly connected to the transmission seat. A servo motor is fixedly mounted at the end of the connecting block. The servo motor drives the transmission lead screw to rotate, driving the transmission seat and the positioning pin to slide left and right along the chute, so that the distance between the positioning pin and the first bending die is adjustable.

[0008] Preferably, an opening groove is formed on the upper surface of the flipping bracket. The connecting block is slidably arranged in the opening groove. A guiding column is fixedly mounted on the lower surface of the connecting block. The guiding column is slidably connected to the inner bottom wall of the opening groove.

[0009] Among them, the transmission assembly includes an eccentric wheel, a tension spring and a transmission rod. The telescopic end of the bending control cylinder is fixedly mounted with a fixed shaft. The fixed shaft movably passes through the inside of the flipping bracket. The eccentric wheel is fixedly connected to the surface of the fixed shaft. The tension spring is sleeved on the surface of the guiding column. The upper and lower ends of the tension spring are respectively fixedly connected to the lower surface of the connecting block and the inner bottom wall of the opening groove. The transmission rod is fixedly mounted on the lower surface of the connecting block. The bottom end of the transmission rod is in sliding contact with the surface of the eccentric wheel, so that the telescopic end of the bending control cylinder can drive the connecting block to reciprocate up and down through the transmission assembly, avoiding interference between the positioning pin and the workpiece during bending processing.

[0010] Preferably, a groove is formed on the side surface of the pressing plate. A movable block is slidably mounted in the groove. The first bending die is fixedly connected to the movable block. A pressing spring is arranged inside the pressing plate. The pressing spring presses down the movable block, so that the lower edge of the first bending die extends downward from the lower surface of the pressing plate. An adjusting bolt is threadedly mounted on the upper surface of the pressing plate. When the first bending die moves upward, the bottom end of the adjusting bolt can press against the upper plane of the first bending die, enabling the first bending die to have the function of pressing the plate to be bent.

[0011] Preferably, the bending machine main body further includes a floor stand and a horizontal auxiliary stand. The bending platform and the horizontal auxiliary stand are both fixedly mounted on the upper side of the floor stand. The upper surfaces of the bending platform and the horizontal auxiliary stand are flush. The bottom end of the lifting control cylinder is rotatably connected to the floor stand.

[0012] The present invention has the following beneficial effects:

[0013] 1. The positioning device presses the plate to be bent against the bending platform by moving the pressing plate downward to achieve pressing and positioning. By flipping the flipping plate, the second bending die approaches the first bending die for bending operation. By adding a flipping bracket on the side of the flipping plate and using the positioning pin on the flipping bracket, the plate to be bent abuts against the positioning pin to achieve the positioning function of the bending length. The distance between the positioning pin and the second bending die is fixed, improving the bending accuracy. This design has a simple structure, convenient operation, and is more user-friendly.

[0014] 2. The positioning device is provided with a transmission component inside the flipping bracket. During the process of the bending control cylinder driving the flipping plate to flip, the transmission component drives the connecting block to retract into the flipping bracket, hiding the positioning pin inside the flipping bracket, avoiding interference between the positioning pin and the pressing plate and the first bending die when the flipping plate rotates upward to the vertical state, facilitating the obtuse-angle flipping of the second bending die, enabling the device to have the function of large-angle bending, and meeting different bending requirements of people. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic three-dimensional structure diagram of the positioning device proposed by the present invention;

[0016] Figure 2 is a schematic side-sectional structure diagram of the flipping plate proposed by the present invention;

[0017] Figure 3 is Figure 1 an enlarged schematic diagram of the structure at A in

[0018] Figure 4 is Figure 2 an enlarged schematic diagram of the structure at B in

[0019] In the figure: 1 flipping bracket, 2 bending platform, 3 pressing plate, 4 flipping plate, 5 first bending die, 6 second bending die, 7 lifting control cylinder, 8 bending control cylinder, 9 connecting block, 10 positioning pin, 11 transmission lead screw, 12 transmission seat, 13 servo motor, 14 guide post, 15 eccentric wheel, 16 tension spring, 17 transmission rod, 18 fixed shaft, 19 movable block, 20 abutting spring, 21 floor stand, 22 horizontal auxiliary frame, 23 adjusting bolt, 24 plate to be bent. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0022] Referring to Figures 1-4 , a positioning device for a bending machine, comprising a bending machine main body and a flipping bracket 1. The bending main body includes a bending platform 2, a pressing plate 3, a flipping plate 4, a first bending die 5 and a second bending die 6. The pressing plate 3 is slidably installed on the upper side of the bending platform 2. A lifting control cylinder 7 is fixedly installed on the surface of the bending platform 2, and the lifting control cylinder 7 drives the pressing plate 3 to move up and down. The flipping plate 4 is rotatably connected to the bending platform 2. A bending control cylinder 8 is rotatably installed on the lower side of the bending platform 2, and the telescopic end of the bending control cylinder 8 is rotatably connected to the flipping plate 4.

[0023] The shapes of the first bending die 5 and the second bending die 6 are determined according to the actual bending shape requirements. In this embodiment, taking the straight plate structure as an example, referring to Figure 3 , the first bending die 5 is assembled with the pressing plate 3, and the second bending die 6 is assembled with the flipping plate 4 through bolts; specifically, a groove is formed on the side surface of the pressing plate 3, and a movable block 19 is slidably installed in the groove. The first bending die 5 is fixedly connected to the movable block 19. A pressing spring 20 is arranged in the pressing plate 3, and the pressing spring 20 presses down on the movable block 19, so that the lower edge of the first bending die 5 extends downward from the lower surface of the pressing plate 3.

[0024] See Figure 4 , an adjusting bolt 23 is threadedly installed on the upper surface of the pressing plate 3. When the first bending die 5 moves upward, the bottom end of the adjusting bolt 23 can press against the upper plane of the first bending die 5.

[0025] The flipping bracket 1 is fixedly connected to the flipping plate 4. A connecting block 9 is slidably installed on the upper surface of the flipping bracket 1. An opening groove is formed on the upper surface of the flipping bracket 1, and the connecting block 9 is slidably arranged in the opening groove. A guiding column 14 is fixedly installed on the lower surface of the connecting block 9, and the guiding column 14 is slidably connected to the inner bottom wall of the opening groove.

[0026] A position-adjustable positioning pin 10 is installed on the surface of the connecting block 9. Referring to Figure 4 , when the pressing plate 3 presses down, the first bending die 5 first contacts the upper surface of the plate to be bent 24, providing a horizontal component force for the plate to be bent 24, so that the plate to be bent 24 is closely attached to the positioning pin 10, avoiding the existence of a gap between the two and affecting the bending size.

[0027] Among them, a chute is provided on the upper surface of the connecting block 9, a transmission seat 12 is slidably installed in the chute, and a transmission lead screw 11 is rotatably installed inside the connecting block 9. The transmission lead screw 11 is threadedly connected to the transmission seat 12, the positioning pin 10 is threadedly connected to the transmission seat 12, a servo motor 13 is fixedly installed at the end of the connecting block 9, and the servo motor 13 drives the transmission lead screw 11 to rotate, driving the transmission seat 12 and the positioning pin 10 to slide left and right along the chute, so that the distance between the positioning pin 10 and the first bending die 5 is adjustable, achieving the effect that the positioning distance of the positioning pin 10 for the plate to be bent 24 is adjustable.

[0028] A transmission assembly is arranged inside the flipping bracket 1, and the telescopic end of the bending control cylinder 8 drives the connecting block 9 to move up and down reciprocally through the transmission assembly.

[0029] Specifically, the transmission assembly includes an eccentric wheel 15, a tension spring 16, and a transmission rod 17. A fixed shaft 18 is fixedly installed at the telescopic end of the bending control cylinder 8, the flipping plate 4 is rotatably connected to the fixed shaft 18, the fixed shaft 18 movably passes through the inside of the flipping bracket 1, and the eccentric wheel 15 is fixedly connected to the surface of the fixed shaft 18. The tension spring 16 is sleeved on the surface of the guide post 14, and the upper and lower ends of the tension spring 16 are respectively fixedly connected to the lower surface of the connecting block 9 and the inner bottom wall of the opening groove. The transmission rod 17 is fixedly installed on the lower surface of the connecting block 9, the bottom end of the transmission rod 17 slides into the inside of the flipping bracket 1 and is in sliding contact with the surface of the eccentric wheel 15, for reference Figure 2 。

[0030] By arranging a transmission assembly inside the flipping bracket 1, during the process of the bending control cylinder 8 driving the flipping plate 4 to flip, the connecting block 9 is driven by the transmission assembly to retract into the flipping bracket 1 as a whole, so that the positioning pin 10 is hidden inside the flipping bracket 1, avoiding interference between the positioning pin 10 and the pressing plate 3 and the first bending die 5 when the flipping plate 4 rotates upward to a vertical state, facilitating the obtuse-angle flipping of the second bending die 6, that is, for reference Figure 4 , the flipping angle of the second bending die 6 is greater than ninety degrees, enabling the device to have the function of large-angle bending and meeting different bending requirements of people.

[0031] The bending machine main body further includes a floor stand 21 and a horizontal auxiliary stand 22. The bending platform 2 and the horizontal auxiliary stand 22 are both fixedly installed on the upper side of the floor stand 21, and the upper surfaces of the bending platform 2 and the horizontal auxiliary stand 22 are flush. The bottom end of the lifting control cylinder 7 is rotatably connected to the floor stand 21.

[0032] The positioning method for this bending machine includes the following specific steps:

[0033] S1. Drive the transmission lead screw 11 to rotate through the servo motor 13, and the transmission seat 12 reciprocates along the length direction of the transmission lead screw 11 to adjust the distance between the positioning pin 10 and the lower cutting edge of the first bending die 5;

[0034] S2. The to-be-bent plate member 24 is placed on the horizontal auxiliary frame 22, the to-be-bent plate member 24 is pushed in, and the to-be-bent plate member 24 is made to abut against the positioning pin 10.

[0035] S3. The lifting control cylinder 7 drives the pressing plate 3 to move downward. The pressing plate 3 presses and fixes the to-be-bent plate member 24 on the bending platform 2. The bending control cylinder 8 extends to drive the turning plate 4 to rotate, so that the second bending die 6 turns towards the first bending die 5 to perform a bending operation on the to-be-bent plate member 24.

[0036] S4. The lifting control cylinder 7 drives the pressing plate 3 to move upward to release the pressing on the to-be-bent plate member 24, and the to-be-bent plate member 24 is taken out. Or steps S1, S2, and S3 are repeated to realize the function of multiple bendings.

[0037] For this positioning device, the pressing plate 3 moves downward to press the to-be-bent plate member 24 on the bending platform 2 to achieve pressing and positioning. By using the turning of the turning plate 4, the second bending die 6 turns towards and approaches the first bending die 5 for bending operation. By adding a turning bracket 1 to the side of the turning plate 4 and using the positioning pin 10 on the turning bracket 1, the to-be-bent plate member 24 abuts against the positioning pin 10 to achieve the positioning function of the bending length. The position of the positioning pin 10 is adjustable. When the position of the positioning pin 10 is determined, its distance relative to the second bending die 6 is fixed, improving the bending accuracy. This design has a simple structure, convenient operation, and is more user-friendly.

[0038] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A positioning device for a bending machine, comprising a bending machine main body and a flipping bracket (1), characterized in that: The bending body includes a bending platform (2), a pressing plate (3), a turning plate (4), a first bending die (5) and a second bending die (6). The pressing plate (3) is slidably installed on the upper side of the bending platform (2). A lifting control cylinder (7) is fixedly installed on the surface of the bending platform (2), and the lifting control cylinder (7) drives the pressing plate (3) to move up and down. The turning plate (4) is rotatably connected to the bending platform (2). A bending control cylinder (8) is rotatably installed on the lower side of the bending platform (2), and the telescopic end of the bending control cylinder (8) is rotatably connected to the turning plate (4). The first bending die (5) is assembled with the pressing plate (3), and the second bending die (6) is assembled with the turning plate (4). The turning bracket (1) is fixedly connected to the turning plate (4). A connecting block (9) is slidably installed on the upper surface of the turning bracket (1). A position-adjustable positioning pin (10) is installed on the surface of the connecting block (9). A transmission assembly is arranged inside the turning bracket (1), and the telescopic end of the bending control cylinder (8) drives the connecting block (9) to move up and down reciprocally through the transmission assembly.

2. The positioning device for a bending machine according to claim 1, wherein: A chute is formed on the upper surface of the connecting block (9), and a transmission seat (12) is slidably installed in the chute. A transmission lead screw (11) is rotatably installed inside the connecting block (9). The transmission lead screw (11) is threadedly connected to the transmission seat (12), and the positioning pin (10) is threadedly connected to the transmission seat (12).

3. The positioning device for a bending machine according to claim 2, characterized in that: A servo motor (13) is fixedly installed at the end of the connecting block (9). The servo motor (13) drives the transmission lead screw (11) to rotate, driving the transmission seat (12) and the positioning pin (10) to slide left and right along the chute.

4. The positioning device for a bending machine according to claim 3, characterized in that: An opening groove is formed on the upper surface of the turning bracket (1), and the connecting block (9) is slidably arranged in the opening groove. A guide post (14) is fixedly installed on the lower surface of the connecting block (9), and the guide post (14) is slidably connected to the inner bottom wall of the opening groove.

5. The positioning device for a bending machine according to claim 4, characterized in that: The transmission assembly includes an eccentric wheel (15), a tension spring (16) and a transmission rod (17). A fixed shaft (18) is fixedly installed at the telescopic end of the bending control cylinder (8). The fixed shaft (18) passes through the turning bracket (1) movably, and the eccentric wheel (15) is fixedly connected to the surface of the fixed shaft (18). The tension spring (16) is sleeved on the surface of the guide post (14), and the upper and lower ends of the tension spring (16) are respectively fixedly connected to the lower surface of the connecting block (9) and the inner bottom wall of the opening groove. The transmission rod (17) is fixedly installed on the lower surface of the connecting block (9), and the bottom end of the transmission rod (17) is in sliding contact with the surface of the eccentric wheel (15).

6. The positioning device for a bending machine according to claim 5, characterized in that: A groove is formed on the side surface of the pressing plate (3), and a movable block (19) is slidably installed in the groove. The first bending die (5) is fixedly connected to the movable block (19). A pressing spring (20) is arranged inside the pressing plate (3), and the pressing spring (20) presses the movable block (19) downward, so that the lower edge of the first bending die (5) extends downward from the lower surface of the pressing plate (3).

7. A positioning device for a bending machine according to claim 6, characterized in that: The upper surface of the pressing plate (3) is threadedly installed with an adjusting bolt (23). When the first bending die (5) moves upward, the bottom end of the adjusting bolt (23) can abut against the upper plane of the first bending die (5).

8. A positioning device for a bending machine according to any one of claims 1-7, characterized in that: The bending machine main body further includes a floor stand (21) and a horizontal auxiliary stand (22). The bending platform (2) and the horizontal auxiliary stand (22) are both fixedly installed on the upper side of the floor stand (21). The upper surfaces of the bending platform (2) and the horizontal auxiliary stand (22) are flush. The bottom end of the lifting control cylinder (7) is rotatably connected to the floor stand (21).

9. A positioning method for a bending machine, characterized in that, It includes the following specific steps: S1. Drive the transmission lead screw (11) to rotate through the servo motor (13), and the transmission seat (12) reciprocates along the length direction of the transmission lead screw (11) to adjust the distance between the positioning pin (10) and the lower edge of the first bending die (5). S2. Place the plate to be bent (24) on the horizontal auxiliary stand (22), push in the plate to be bent (24), and make the plate to be bent (24) abut against the positioning pin (10). S3. The lifting control cylinder (7) drives the pressing plate (3) to move downward. The pressing plate (3) presses and fixes the plate to be bent (24) on the bending platform (2). The bending control cylinder (8) extends to drive the turning plate (4) to rotate, so that the second bending die (6) turns towards the first bending die (5) to perform a bending operation on the plate to be bent (24). S4. The lifting control cylinder (7) drives the pressing plate (3) to move upward to release the pressing on the plate to be bent (24), and take out the plate to be bent (24), or repeat steps S1, S2, and S3 to achieve multiple bendings.

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