Positioning device and bending machine

Abstract

The utility model relates to the technical field of bending machines, in particular to a positioning device which comprises a driving mechanism, transverse guide rails are arranged at the output end of the driving mechanism, at least two positioning stop fingers are arranged on the transverse guide rails, the number of the transverse guide rails is two, the transverse guide rails are arranged in parallel, and each positioning stop finger comprises a sliding seat and a stop finger head rotationally connected to the sliding seat. The bottom of the sliding seat is rotationally connected with two rows of roller sets, each row of roller sets is provided with at least two rollers, and the rollers in the same row roll on the same transverse guide rail. The bending machine comprises a bending machine body and further comprises the positioning device. The scheme is used for solving the problem that the existing positioning stop finger slides in a mode that a sliding block is matched with a guide rail, so that clamping stagnation is easy to generate.

Description

Technical Field

[0001] The utility model relates to the technical field of bending machines, and particularly relates to a positioning device and a bending machine. Background Technique

[0002] In the field of sheet metal processing, a bending machine is a key device for plastic forming by applying pressure to a metal sheet through a die. Its positioning system directly determines the bending accuracy, which is particularly crucial for the processing of materials such as aluminum sheets and ultra-thin stainless steel.

[0003] A typical bending machine positioning system includes a driving mechanism and at least two positioning stop fingers installed at the output end of the driving mechanism. A transverse guide rail is installed at the output end of a typical driving mechanism. All the positioning stop fingers slide on the transverse guide rail by means of fixed sliders. The distance between adjacent positioning stop fingers is adjusted by manually sliding the positioning stop fingers. This driving mechanism includes an X-axis driver and a Z-axis driver. The X-axis driver is used to drive the positioning stop fingers to move forward and backward to approach / away from the bending die, and the Z-axis driver is used to drive the positioning stop fingers to lift to adapt to different height positioning requirements. The direction of the transverse guide rail can be called the Y-axis direction. In another fully automatic control bending machine, the positioning stop fingers still slide on the transverse guide rail, but the driving mechanism of this positioning system also includes a Y-axis driver for driving the positioning stop fingers to automatically move in the Y-axis direction.

[0004] However, the current transverse guide rails are all horizontally installed, such as a rear positioning system suitable for a compact bending machine with a patent publication number of 《CN211191732U》, a new rear stop finger system suitable for bending automation with a patent publication number of 《CN213316949U》, and 《Bending Machine Supporting Robot Special Rear Stop Finger》 with a patent publication number of CN221473136U, etc.; the friction between the guide rail and the slider is sliding friction. To ensure the normal and stable movement of the slider, it is necessary to ensure lubrication between the two. However, due to the fact that the distance between the positioning stop fingers and the position of the positioning stop fingers often need to be changed according to the processing requirements of different products, the transverse guide rail is often completely exposed, which causes external dust, impurities, etc. to adhere to the guide rail, and easily leads to jamming problems, which is not conducive to the smooth movement of the slider after long-term use, and makes maintenance more frequent.

[0005] Secondly, the contact point between the positioning stop finger and the workpiece is often the end of the stop finger. Currently, the stop finger is installed at the end of the cantilever extension section of the positioning stop finger. This presents two problems. First, in order to make the stop finger horizontal after rotation, a support block needs to be separately processed or fixedly installed on the cantilever extension section of the positioning stop finger, which increases the processing cost. Second, since the positioning device (also referred to as the positioning system in this article) can drive the positioning stop finger to rise, fall and move back and forth, when the cantilever extension section of the positioning stop finger moves downward with the positioning device, there is a problem that the extension section does not move away from the bending die in time, causing the cantilever extension section to hit the upper die / support die structure of the bending machine during the descent process. Utility Model Content

[0006] The present invention aims to provide a positioning device to solve the problem of jamming that occurs when the positioning stop finger slides in a manner that combines a slider and a guide rail.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A positioning device includes a drive mechanism. The output end of the drive mechanism is provided with a transverse guide rail. At least two positioning stops are provided on the transverse guide rail. There are two transverse guide rails arranged in parallel. Each positioning stop includes a sliding seat and a stop finger head rotatably connected to the sliding seat. Two rows of roller groups are rotatably connected to the bottom of the sliding seat. Each row of roller groups has at least two rollers. The rollers in the same row roll on the same transverse guide rail.

[0009] Preferably, as an improvement, the roller is in concave-convex fit with the transverse guide rail, and the roller is used to roll on the transverse guide rail.

[0010] Preferably, as an improvement, the transverse guide rail and the roller are in the front-rear direction.

[0011] Preferably, as an improvement, the sliding seat includes a seat body and a connecting plate mounted on the seat body. Rollers are mounted on the bottom of the seat body. The connecting plate is shorter than the seat body and located at the top of the seat body. The stop finger is elongated and one end of the stop finger is rotatably connected to the connecting plate. When the stop finger is in a horizontal state, the end of the stop finger near the connecting plate can be supported by the seat body.

[0012] Preferably, as an improvement, the seat is provided with a front-to-back fine-tuning mechanism, which is used to adjust the front-to-back position of the connecting plate relative to the seat.

[0013] Preferably, as an improvement, the base is also equipped with two guide pins, the line connecting the two guide pins being perpendicular to the transverse guide rail, and the side of the guide pins being in contact with the side of the connecting plate, so as to provide guidance for the back-to-back fine adjustment of the connecting plate when the fine adjustment mechanism adjusts the position of the connecting plate relative to the base, and also to provide positioning for installation accuracy when the connecting plate is installed.

[0014] Preferably, as an improvement, the front-to-back fine-tuning mechanism includes an adjusting wheel, a screw, and a slider. The adjusting wheel is fixed to the end of the screw. The screw is rotatably connected to the base and is used for rotation without axial movement. The slider is connected to the screw and slidably connected to the base, so that the slider can move axially after the screw rotates. The connecting base is fixedly connected to the slider. This solution allows for front-to-back fine-tuning of the connecting plate by simply turning the adjusting wheel, making operation simple and convenient.

[0015] Preferably, as an improvement, the connecting plate is threaded with an auxiliary positioning pin. The auxiliary positioning pin can penetrate the connecting plate and abut against the surface of the seat. The auxiliary positioning pin is used to lock the position of the connecting plate after the fine-tuning mechanism is adjusted to the correct position, and it can also be used to position the workpiece when it needs to be positioned at a far position, in cooperation with the auxiliary positioning pin on the adjacent positioning stop finger.

[0016] Preferably, as an improvement, the lateral width of the base is wider than the width of the stop finger and also wider than the width of the connecting plate, so that when the two positioning stops accidentally collide, the connecting plate and the stop finger will not be directly impacted, and the base, which is wider than the connecting plate, also provides space for the installation of the two rows of rollers.

[0017] Preferably, as an improvement, each roller group has 2 rollers.

[0018] This utility model also provides a bending machine, including a bending machine body and the aforementioned positioning device.

[0019] Technical effects of this utility model:

[0020] 1. This solution uses two rows of rollers to replace the existing slider and guide rail connection, thereby replacing sliding friction with rolling friction. This greatly reduces the cleanliness requirements on the transverse guide rail, reduces the probability of jamming, and reduces the frequency of maintenance.

[0021] 2. This design changes the previous method of installing the stop finger only on the extended section of the cantilever. Instead, the stop finger is long and narrow, with one end extending directly above the base and the other end extending outwards. This eliminates the need for a support plate in existing technologies to support short stop fingers, allowing the base to provide direct support and reducing the processing cost of the positioning stop finger. Furthermore, even if the cantilever structure of the positioning stop finger spans the mold installation position of the bending machine, and a misoperation causes the positioning stop finger to move downwards, the long, rotatable cantilever structure of the positioning stop finger will cause it to rotate upon contact, thus avoiding damage from a hard collision. Attached Figure Description

[0022] Figure 1 This is a top view schematic diagram of a positioning device according to Embodiment 1 of this utility model.

[0023] Figure 2 This is a front view schematic diagram of a positioning device according to Embodiment 1 of this utility model.

[0024] Figure 3 This is a three-dimensional structural diagram of the positioning stop finger in Embodiment 1 of this utility model.

[0025] Figure 4 for Figure 3 A schematic diagram of the three-dimensional structure after rotation.

[0026] Figure 5 for Figure 3 The main view.

[0027] Figure 6 for Figure 3 Top view.

[0028] Figure 7 for Figure 3 A bottom view.

[0029] Figure 8 for Figure 3 Front sectional view.

[0030] Figure 9 This is a partial three-dimensional schematic diagram of the relationship between the positioning stop, the base, and the transverse guide rail in Embodiment 1 of this utility model. Detailed Implementation

[0031] The following detailed description illustrates the specific implementation method:

[0032] The reference numerals in the accompanying drawings include: drive mechanism 1, X-axis driver 11, Z-axis driver 12, base 13, transverse guide rail 10, positioning stop finger 20, sliding seat 21, seat body 211, connecting plate 212, front and rear fine adjustment mechanism 213, guide pin 214, adjusting wheel 30, screw 40, slider 50, auxiliary positioning pin 60, stop finger head 22, and roller 23.

[0033] Example 1

[0034] Combination Figures 1 to 9 A positioning device includes a drive mechanism 1. The output end of the drive mechanism 1 is provided with a transverse guide rail 10. The transverse guide rail 10 is provided with at least two positioning stops 20 (the figure in this embodiment shows three stops). There are two transverse guide rails 10 arranged in parallel. The positioning stops 20 include a sliding seat 21 and a stop finger head 22 rotatably connected to the sliding seat 21. Two rows of rollers 23 are rotatably connected to the bottom of the sliding seat 21. Each row of rollers 23 has two rollers 23 in this embodiment. The rollers 23 in the same row roll on the same transverse guide rail 10.

[0035] In this embodiment, the drive mechanism 1 includes an X-axis driver 11 and a Z-axis driver 12. The output end of the X-axis driver 11 is mounted on the Z-axis driver 12, and the output end of the Z-axis driver 12 is fixed to the base 13. The X-axis driver 11 is used to drive the positioning stop finger 20 to move back and forth to approach / move away from the bending die, and the Z-axis driver 12 is used to drive the positioning stop finger 20 to rise and fall. The two transverse guide rails 10 are fixedly mounted on the base 13.

[0036] The roller 23 is in a concave-convex fit with the transverse guide rail 10. The roller 23 is used to roll on the transverse guide rail 10. The transverse guide rail 10 and the roller 23 are in the front-back direction.

[0037] In this embodiment, the roller 23 moves on the transverse guide rail 10 to adjust the transverse position of the positioning stop finger 20. During the adjustment process, the roller 23 rolls, thereby reducing friction with the transverse guide rail 10.

[0038] The sliding seat 21 includes a seat body 211 and a connecting plate 212 mounted on the seat body 211. A roller 23 is mounted on the bottom of the seat body 211. The connecting plate 212 is shorter than the seat body 211 and is located at the top of the seat body 211. The stop finger 22 is long and narrow. One end of the stop finger 22 is rotatably connected to the connecting plate 212. When the stop finger 22 is in a horizontal state, the end of the stop finger 22 near the connecting plate 212 can be supported by the seat body 211.

[0039] The lateral width of the base 211 is wider than the width of the stop finger 22 and also wider than the width of the connecting plate 212. The wider base 211 ensures that the connecting plate 212 and the stop finger 22 will not be directly impacted when the two positioning stops 20 accidentally collide. The wider base 211 also provides space for the installation of the two rows of rollers 23.

[0040] The base 211 is provided with a front-to-back fine adjustment mechanism 213, which is used to adjust the front-to-back position of the connecting plate 212 relative to the base 211.

[0041] Two guide pins 214 are also installed on the base 211. The line connecting the two guide pins 214 is perpendicular to the transverse guide rail 10. The side of the guide pin 214 is in contact with the side of the connecting plate 212, so that the guide pin 214 is used for both unilateral positioning of the installation position of the connecting plate 212 and for guiding the forward and backward movement of the connecting plate 212 when adjusting its front and back position.

[0042] Combination Figure 8In one embodiment, the front-to-back fine-tuning mechanism 213 includes an adjusting wheel 30, a screw 40, and a slider 50. The adjusting wheel 30 is fixed to the end of the screw 40. The screw 40 is rotatably connected to the base 211 and is used for rotation without axial movement. The slider 50 is connected to the screw 40 and slidably connected to the base 211, so that the slider 50 can move axially after the screw 40 rotates. The connecting seat is fixedly connected to the slider 50. An auxiliary positioning pin 60 is threaded onto the connecting plate 212. The auxiliary positioning pin 60 can penetrate the connecting plate 212 and abut against the surface of the base 211. This facilitates locking the position of the connecting plate 212 by using the abutment of the auxiliary positioning pin 60 on the base 211 after the front-to-back fine-tuning mechanism 213 has adjusted the position of the connecting plate 212 to the correct position. The operation is simple and convenient. In addition, the auxiliary positioning pin 60 can also cooperate with other positioning stops 20 to achieve lateral positioning of the workpiece.

[0043] Example 2

[0044] A bending machine includes a bending machine body and a positioning device for positioning the workpiece during bending. The positioning device is shown in Embodiment 1. The bending machine body has the structure shown in the prior art, which will not be described in detail here.

[0045] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A positioning device, comprising a drive mechanism, wherein the output end of the drive mechanism is provided with a transverse guide rail, and at least two positioning stops are provided on the transverse guide rail, characterized in that: There are two transverse guide rails arranged in parallel. The positioning stop includes a sliding seat and a stop finger head rotatably connected to the sliding seat. Two rows of roller groups are rotatably connected to the bottom of the sliding seat. Each row of roller groups has at least two rollers, and the rollers in the same row roll on the same transverse guide rail.

2. The positioning device according to claim 1, characterized in that: The roller is in concave-convex fit with the transverse guide rail, and the roller is used to roll on the transverse guide rail.

3. A positioning device according to claim 2, characterized in that: The transverse guide rail and the roller are in the front-back direction.

4. A positioning device according to claim 1, characterized in that: The sliding seat includes a seat body and a connecting plate mounted on the seat body. Rollers are mounted at the bottom of the seat body. The connecting plate is shorter than the seat body and located at the top of the seat body. The stop finger is long and narrow, with one end of the stop finger rotatably connected to the connecting plate. When the stop finger is in a horizontal state, the end of the stop finger near the connecting plate can be supported by the seat body.

5. A positioning device according to claim 4, characterized in that: The base is equipped with a front-to-back fine-tuning mechanism, which is used to adjust the front-to-back position of the connecting plate relative to the base.

6. A positioning device according to claim 5, characterized in that: The base is also equipped with two guide pins, the line connecting the two guide pins is perpendicular to the transverse guide rail, and the side of the guide pin is in contact with the side of the connecting plate.

7. A positioning device according to claim 5, characterized in that: The front and rear fine-tuning mechanism includes an adjusting wheel, a screw, and a slider. The adjusting wheel is fixed to the end of the screw. The screw is rotatably connected to the base and is used for rotation without axial movement. The slider is connected to the screw and is slidably connected to the base so that the slider can move axially after the screw rotates. The connecting base is fixedly connected to the slider.

8. A positioning device according to claim 7, characterized in that: The connecting plate is threaded with an auxiliary positioning pin, which can penetrate the connecting plate and abut against the surface of the base.

9. A positioning device according to claim 4, characterized in that: The lateral width of the seat is wider than the width of the finger guard and also wider than the width of the connecting plate.

10. A bending machine, comprising a bending machine body, characterized in that: It also includes the positioning device as described in any one of claims 1-9.

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