Bending angle detecting device for bending machine

Abstract

The application discloses a bending angle detection device for a bending machine, characterized in that the detection device comprises a motor arranged on a machine frame of the bending machine, a first bevel gear arranged at a working end of the motor, the first bevel gear is engaged with a second bevel gear, the second bevel gear is provided with a threaded inner hole, the second bevel gear is threadedly connected with a screw rod through the threaded inner hole, a bottom end of the screw rod is rotatably connected with a top end of an extension shaft, the extension shaft is movably sleeved in a supporting sleeve fixedly connected with the machine frame of the bending machine, a transverse pin shaft perpendicular to the extension shaft is arranged at a bottom end of the extension shaft, the transverse pin shaft is movably connected in a long hole arranged in a lifting frame, a first spring is further sleeved at the bottom of the extension shaft, the first spring is located between a top end surface of the lifting frame and a bottom end surface of the supporting sleeve, two second springs are symmetrically arranged on the supporting sleeve, and bottom ends of the two second springs are connected with the top end surface of the lifting frame.

Description

Technical Field

[0001] This invention relates to the field of stamping dies, and in particular to a bending angle detection device for a bending machine. Background Technology

[0002] In sheet metal stamping, the sheet metal often needs to be bent. After stamping, the bending angle of the bent sheet metal needs to be inspected. Traditional stamping equipment cannot directly inspect the bending angle of the stamped sheet metal; the product must be removed from the stamping machine for inspection, which is cumbersome, inefficient, and affects work efficiency. Even if defective products are put back on the stamping die for re-stamping, the secondary operation inevitably affects the product's precision. Therefore, a method or device is needed to solve these problems. Summary of the Invention

[0003] The present invention addresses the aforementioned shortcomings of the prior art by proposing a bending angle detection device that is simple in structure, ingenious in design, and rational in layout, capable of detecting the bending angle in real time after stamping to ensure accurate bending angle.

[0004] The technical solution of the present invention is: a bending angle detection device for a bending machine, characterized in that: the detection device includes a motor 1 mounted on the frame of the bending machine, the working end of the motor 1 is provided with a first bevel gear 2, the first bevel gear 2 meshes with a second bevel gear 3, the second bevel gear 3 is provided with a threaded inner hole, the second bevel gear 3 is threadedly connected to a screw 4 through the threaded inner hole, and the bottom end of the screw 4 is rotatably connected to the top end of a telescopic shaft 5, the telescopic shaft 5 is movably sleeved in a support sleeve 6 fixedly connected to the frame of the bending machine, the bottom end of the telescopic shaft 5 is provided with a transverse pin 7 perpendicular to it, the transverse pin 7 is movably connected in an elongated hole 9 opened in a lifting frame 8, a first spring 10 is also sleeved on the bottom of the telescopic shaft 5, the first spring 10 is located between the top surface of the lifting frame 8 and the bottom surface of the support sleeve 6, and two second springs 11 are symmetrically arranged on the support sleeve 6, and the bottom ends of the two second springs 11 are connected to the top surface of the lifting frame 8.

[0005] Two first swing arms 12 are symmetrically rotatably connected to both ends of the bottom surface of the lifting frame 8. A second swing arm 13 is rotatably connected to the middle of the first swing arm 12. The other end of the second swing arm 13 is rotatably connected to the end of the transverse pin 7. The bottom end of the first swing arm 12 is hinged to the top end of the detection block 14. Two staggered first detection rods 15 are rotatably supported on the detection block 14 via a first rotating shaft. A third spring 16 is connected between the upper parts of the two first detection rods 15, that is, the third spring 16 is located above the first rotating shaft.

[0006] The detection device further includes an adjustment seat, which includes a base 17. A stud 18 is mounted on the base 17, and an adjusting nut 19 is threaded onto the stud 18. A lifting platform 20 is rotatably connected to the top of the adjusting nut 19. A groove for accommodating the stud 18 is formed on the bottom surface of the lifting platform 20. An angle scale 21 and a support frame are mounted on the top surface of the lifting platform 20. Two staggered second detection rods 22 are rotatably supported on the support frame via a second rotating shaft. A fourth spring 23 is connected between the lower parts of the two second detection rods 22, i.e., the fourth spring 23 is located below the second rotating shaft. The second detection rods 22 are positioned to match the first detection rod 15. An indicating portion is provided at the bottom of the second detection rod 22, and the indicating portion is positioned to match the angle scale 21.

[0007] The base 17 is also provided with a support rod 24, and an infrared emitting end 25 is provided at the top of the support rod 24. An infrared receiving end 26 that matches the infrared emitting end 25 is provided on the lower die 27 of the bending machine. The second rotating shaft is a hollow shaft.

[0008] Compared with the prior art, the present invention has the following advantages:

[0009] This type of bending angle detection device for bending machines is simple in structure, ingenious in design, and rational in layout. Addressing the problems caused by the inability to directly detect the bending angle of the workpiece after bending operations in traditional bending machines, it features a unique structure. It constructs a scissor-type detection rod with conditions identical to the workpiece being processed. This detection rod is triggered by another set of scissor-type detection rods, and the angle corresponding to the scissor-type detection rod is directly marked by an angle scale matching the triggered detection rod. This allows for the determination of the bending angle of the workpiece under the same detection conditions. It can detect the bending angle of the workpiece immediately after the stamping operation ends. Attached Figure Description

[0010] Figure 1 This is a structural schematic diagram of an embodiment of the present invention (in a non-detection state).

[0011] Figure 2 This is a schematic diagram of the structure (detection state) of an embodiment of the present invention.

[0012] Figure 3 This is a schematic diagram of the adjustment seat portion in an embodiment of the present invention (direction one).

[0013] Figure 4 This is a schematic diagram of the working state of the adjusting seat in an embodiment of the present invention (direction two). Detailed Implementation

[0014] Specific embodiments of the present invention will now be described in conjunction with the accompanying drawings. Figures 1 to 4 The diagram shows a bending angle detection device for a bending machine. The device includes a motor 1 mounted on the bending machine frame. A first bevel gear 2 is mounted on the working end of the motor 1, meshing with a second bevel gear 3. The second bevel gear 3 has a threaded inner hole and is threadedly connected to a screw 4 through the threaded inner hole. The bottom end of the screw 4 is rotatably connected to the top end of a telescopic shaft 5. The telescopic shaft 5 is movably sleeved in a support sleeve 6 fixedly connected to the bending machine frame. A transverse pin 7 perpendicular to the bottom end of the telescopic shaft 5 is mounted on it, movably connected to an elongated hole 9 within a lifting frame 8. A first spring 10 is also sleeved on the bottom of the telescopic shaft 5, located between the top surface of the lifting frame 8 and the bottom surface of the support sleeve 6. Two second springs 11 are symmetrically arranged on the support sleeve 6, with their bottom ends connected to the top surface of the lifting frame 8.

[0015] Two first swing arms 12 are symmetrically rotatably connected to both ends of the bottom surface of the lifting frame 8. A second swing arm 13 is rotatably connected to the middle of the first swing arm 12. The other end of the second swing arm 13 is rotatably connected to the end of the transverse pin 7. The bottom end of the first swing arm 12 is hinged to the top end of the detection block 14. Two staggered first detection rods 15 are rotatably supported on the detection block 14 via a first rotating shaft. A third spring 16 is connected between the upper parts of the two first detection rods 15, that is, the third spring 16 is located above the first rotating shaft.

[0016] The detection device further includes an adjustment seat, which includes a base 17. A stud 18 is mounted on the base 17, and an adjusting nut 19 is threaded onto the stud 18. A lifting platform 20 is rotatably connected to the top of the adjusting nut 19. A groove for accommodating the stud 18 is formed on the bottom surface of the lifting platform 20. An angle scale 21 and a support frame are mounted on the top surface of the lifting platform 20. Two staggered second detection rods 22 are rotatably supported on the support frame via a second rotating shaft. A fourth spring 23 is connected between the lower parts of the two second detection rods 22, i.e., the fourth spring 23 is located below the second rotating shaft. The second detection rods 22 are positioned to match the first detection rod 15. An indicating portion is provided at the bottom of the second detection rod 22, and the indicating portion is positioned to match the angle scale 21.

[0017] The base 17 is also provided with a support rod 24, and an infrared emitting end 25 is provided at the top of the support rod 24. An infrared receiving end 26 that matches the infrared emitting end 25 is provided on the lower die 27 of the bending machine. The second rotating shaft is a hollow shaft.

[0018] The working process of the bending angle detection device for a bending machine according to an embodiment of the present invention is as follows: In the initial state, the device is in the following position... Figure 1 In the state shown, there is no interference between the movement trajectory of the detection block 14 and the upper die, so the bending machine can smoothly drive the upper die (punch) downwards.

[0019] The upper die moves downward to stamp the workpiece 28 located on the lower die 27 (cavity), stamping the plate-shaped workpiece 28 into a bent shape that matches the shape of the upper and lower dies 27. After stamping, the upper die moves upward, leaving the workpiece 28 on the lower die 27.

[0020] After receiving the signal from the press, the control system starts the motor 1. The working end of the motor 1 drives the second bevel gear 3 to rotate through the first bevel gear 2. When the second bevel gear 3 rotates, it drives the screw 4 connected to it to move longitudinally, which in turn drives the telescopic shaft 5 connected to the bottom of the screw 4 to move downward. In the initial stage of the movement of the telescopic shaft 5, the transverse pin 7 will move in the elongated hole 9. The transverse pin 7 will drive the two second rocker arms 13 to swing, and finally push the two first rocker arms 12 to swing outward at the same time. At this time, one detection block 14 moves to the top of the workpiece 28, and the other detection block 14 moves to the top of the detection device.

[0021] Then the telescopic shaft 5 continues to descend. When the transverse pin 7 moves to the bottom of the elongated hole 9, the transverse pin 7 will push the lifting frame 8 to descend together (during this process, the two second springs 11 are stretched), which in turn drives the two detection blocks 14 to descend until the first detection rod 15 on the detection block 14 above the workpiece 2 contacts the surface of the workpiece 28. At the same time, the first detection rod 15 on the detection block 14 above the detection device contacts the second detection rod 22. Since the height of the workpiece 28 is fixed, and the second detection rod 22 is measured in advance by the height detection device and adjusted to the same horizontal height as the workpiece 28 under the action of the adjustment seat, the rotation speed of the motor 1 can be controlled according to the height of the workpiece 28 after molding in actual work, so as to ensure that the motor 1 stops working exactly when the first detection rod 15 contacts the workpiece 28.

[0022] At this time, the first detection rods 15 on the two detection blocks 14 are under the same conditions. Therefore, the angle detected by the first detection rod 15 that matches the detection device is the bending angle of the workpiece 28.

[0023] When the bottom end of the first detection rod 15 contacts the upper half of the second detection rod 22, the second detection rod 22 will gradually open as the first detection rod 15 moves downward. When the first detection rod 15 stops moving, the indicator part at the bottom end of the second detection rod 22 will mark the current angle on the angle scale 21, and this angle value is the bending angle of the workpiece 28.

[0024] If the worker observes that the bending angle meets the requirements, they will issue a command through the control system to control the robot or other mechanism to remove the workpiece 28 from the lower die 27 and transport it to the qualified material rack or the next process; otherwise, it will be transported to the unqualified material rack.

[0025] After the inspection is completed, the control system controls the motor 1 to rotate in the opposite direction. Under the action of the first spring 10 and the second spring 16, the lifting frame 8 returns to the initial position, and the first swing arm 12 and the second swing arm 13 also swing in the opposite direction and return to the initial position, waiting for the next inspection.

Claims

1. A bending angle detection device for a bending machine, characterized in that: The detection device includes a motor (1) arranged on the frame of the bending machine, a first bevel gear (2) arranged at the working end of the motor (1), the first bevel gear (2) engaged with a second bevel gear (3), the second bevel gear (3) provided with a threaded hole, the second bevel gear (3) threadedly connected with a screw rod (4) through the threaded hole, the bottom end of the screw rod (4) rotatably connected with the top end of an extension shaft (5), the extension shaft (5) movably sleeved in a supporting sleeve (6) fixedly connected with the frame of the bending machine, the bottom end of the extension shaft (5) provided with a transverse pin shaft (7) perpendicular to the extension shaft (5), the transverse pin shaft (7) movably connected in a long hole (9) arranged in a lifting frame (8), the bottom of the extension shaft (5) further sleeved with a first spring (10), the first spring (10) located between the top end surface of the lifting frame (8) and the bottom end surface of the supporting sleeve (6), two second springs (11) symmetrically arranged on the supporting sleeve (6), and the bottom ends of the two second springs (11) connected with the top end surface of the lifting frame (8), two first swing rods (12) symmetrically rotatably connected at the two ends of the bottom end surface of the lifting frame (8), a second swing rod (13) rotatably connected at the middle portion of the first swing rod (12), the other end of the second swing rod (13) rotatably connected with the end portion of the transverse pin shaft (7), the bottom end of the first swing rod (12) hingedly connected with the top end of a detection block (14), two first detection rods (15) staggered arranged rotatably supported on the detection block (14) through a first rotating shaft, a third spring (16) connected between the upper portions of the two first detection rods (15), i.e. the third spring (16) located above the first rotating shaft, the detection device further includes an adjusting seat, the adjusting seat including a base (17), a stud (18) arranged on the base (17), an adjusting nut (19) threadedly connected with the stud (18), a lifting platform (20) rotatably connected with the top end of the adjusting nut (19), a recess accommodating the stud (18) arranged on the bottom end surface of the lifting platform (20), an angle scale (21) and a support frame arranged on the top end surface of the lifting platform (20), two second detection rods (22) staggered arranged rotatably supported on the support frame through a second rotating shaft, a fourth spring (23) connected between the lower portions of the two second detection rods (22), i.e. the fourth spring (23) located below the second rotating shaft, the second detection rods (22) matched with the first detection rods (15) in position, an indicating portion arranged at the bottom end of the second detection rods (22), the indicating portion matched with the angle scale (21) in position, a support rod (24) arranged on the base (17), an infrared emitting end (25) arranged at the top end of the support rod (24), an infrared receiving end (26) matched with the infrared emitting end (25) arranged on a lower die (27) of the bending machine, and the second rotating shaft is a hollow shaft. The first detection rod (15) on the two detection blocks (14) is in the same condition, and the angle detected by the first detection rod (15) matched with the detection device is the bending angle of the workpiece (28).

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