Servo Dual-Pump Mechanism of Electro-hydraulic CNC Bending Machine

Abstract

This utility model discloses a servo dual-pump mechanism for an electro-hydraulic CNC bending machine, belonging to the field of CNC bending machines. The servo dual-pump mechanism includes a bending blade. A first hydraulic cylinder and a second hydraulic cylinder are respectively arranged on both sides of the upper end of the bending blade. A limiting frame is provided on one side of the first hydraulic cylinder and the other side of the second hydraulic cylinder. A sliding rod is provided at the lower end of the outer side of the limiting frame. Rollers are provided on both the upper and lower sides of the limiting frame. This utility model solves the problem that existing dual-pump CNC bending machines lack an additional structure for continuous detection of whether the bending blade is tilted. In this utility model, when the sliding rod tilts, it presses against the roller in the tilted direction. The roller, through a spring, presses against a pressure sensor. Once the pressure sensor detects a set pressure value, it can determine whether the sliding rod has tilted in the corresponding direction.

Description

Technical Field

[0001] This utility model relates to the field of CNC bending machines, specifically to a servo dual-pump mechanism for an electro-hydraulic CNC bending machine. Background Technology

[0002] The servo dual-pump mechanism of the electro-hydraulic CNC bending machine uses two servo motors and servo pumps to control the left and right hydraulic cylinders respectively. This mechanism controls the output flow of the hydraulic pumps through the servo motors according to the program settings, thereby precisely controlling the movement speed, positioning, and pressure of the slider. This system can achieve synchronous operation of the left and right hydraulic cylinders, effectively reducing energy loss, improving system efficiency, and lowering energy consumption and operating costs. It is an ideal choice for large bending machines and high-precision bending equipment.

[0003] Chinese patent CN221817069U discloses an electro-hydraulic servo dual-pump CNC bending machine, including a frame. A bending component one and a bending component two are fixed inside the frame. The bending component two is located directly below the bending component one. In this application, an external electro-hydraulic servo system controls a hydraulic cylinder for bending. When different bending angles are required, a reciprocating motor on the drive component drives a bidirectional screw to rotate to one side, thereby causing two sets of bending dies to move in opposite directions on a slide rail. This increases the distance between the two sets of bending dies, and the bending angle also increases. When rotating to the other side, the distance between the two sets of bending dies decreases, and the bending angle decreases. This allows for flexible adjustment of different bending angles, enabling the processing of various bending angles.

[0004] In the aforementioned patented dual-pump CNC bending machine, when the hydraulic cylinders on both sides of the upper end of the bending blade are independently driven by the dual pumps and extend and retract, the bending blade may tilt if the oil transmission volume on both sides is inconsistent. The tilted bending blade will cause damage to the fixing rod and generate significant noise when the longitudinal horizontal position is continuously adjusted. There is no additional structure to continuously detect whether the bending blade is tilted, and the tilt can only be detected during maintenance, which can easily lead to equipment damage. Utility Model Content

[0005] The purpose of this invention is to provide a servo dual-pump mechanism for an electro-hydraulic CNC bending machine. When the sliding rod tilts, it will press the roller in the tilting direction. The roller, through a spring, presses the pressure sensor. After the pressure sensor detects the set pressure value, it can determine whether the sliding rod has tilted in the corresponding direction. After the pressure sensor determines the tilt, it sends a start signal to the buzzer, which can then emit a sound to remind the user. This solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a servo dual-pump mechanism for an electro-hydraulic CNC bending machine, comprising a bending blade, wherein a first hydraulic cylinder and a second hydraulic cylinder are respectively arranged on both sides of the upper end of the bending blade, a limiting frame is provided on one side of the first hydraulic cylinder and the other side of the second hydraulic cylinder, a sliding rod is provided at the lower end of the outer side of the limiting frame, rollers are provided on both sides of the upper and lower ends inside the limiting frame, a connecting frame is rotatably provided outside the rollers, a first movable groove is provided on both sides of the outer side of the limiting frame, a storage frame is provided on one side of the outer side of the first movable groove, a pressing piece is provided on the other side of the storage frame, a pressure sensor is provided through the storage frame on the other side of the pressing piece, and a buzzer is provided at one end of the storage frame.

[0007] Preferably, the first movable groove extends through and to both the inner and outer ends of the limiting frame, a limiting piece is provided on one side inside the storage frame, and the connecting frame extends through the first movable groove and is welded and fixed to the limiting piece, and a spring is provided between the limiting piece and the pressing piece.

[0008] Preferably, the buzzer is electrically connected to the pressure sensor.

[0009] Preferably, the lower end of the second hydraulic cylinder is rotatably connected to the other side of the upper end of the bending blade via a first connecting shaft.

[0010] Preferably, a second movable groove is provided on one side of the inside of the bending blade corresponding to the lower end of the first hydraulic cylinder, and a sliding block is slidably disposed inside the second movable groove.

[0011] Preferably, the front and rear ends of the sliding block are rotatably connected to the lower end of the first hydraulic cylinder via a second connecting shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] In this invention, when the bending blade is driven to move longitudinally and horizontally by the first and second hydraulic cylinders, the vertical longitudinal movement of the sliding rod is detected by pressure sensors on both sides. When the sliding rod tilts, it presses against the roller in the tilted direction. The roller, through a spring, presses against the pressure sensor. After the pressure sensor detects the set pressure value, it can determine whether the sliding rod has tilted in the corresponding direction. After the pressure sensor determines the tilt, it sends a start signal to the buzzer, which can then sound an alarm to remind the user. This provides a direct warning when the bending blade tilts, eliminating the need to discover the tilt during maintenance. This improves the protection of the bending blade and extends its service life, preventing the continued use of a tilted bending blade from reducing the safety of the equipment. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the overall external structure of this utility model;

[0015] Figure 2 This is a schematic diagram showing the connection position between the first hydraulic cylinder and the bending blade of this utility model;

[0016] Figure 3 This is a top view of the roller position of this utility model;

[0017] Figure 4 This is a cross-sectional view of the internal structure of the limiting frame of this utility model;

[0018] Figure 5 For the present utility model Figure 4 Enlarged view of region A in the middle;

[0019] Figure 6 This is a cross-sectional view of the first connecting shaft transmission structure of this utility model;

[0020] Figure 7 This is a cross-sectional view of the second movable slot transmission structure of this utility model.

[0021] In the diagram: 1. Frame; 2. Restriction frame; 3. First hydraulic cylinder; 4. Bending blade; 5. Bending component; 6. Sliding rod; 7. Movable rail; 8. Roller; 9. Connecting frame; 10. Buzzer; 11. Pressure sensor; 12. Storage frame; 13. Spring; 14. First movable groove; 15. Pressing piece; 16. Restriction piece; 17. First connecting shaft; 18. Sliding block; 19. Second connecting shaft; 20. Second hydraulic cylinder; 21. Second movable groove. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments.

[0023] like Figure 1 As shown, the servo dual-pump mechanism of the electro-hydraulic CNC bending machine in this embodiment includes a bending blade 4. A first hydraulic cylinder 3 is provided on one side of the upper end of the bending blade 4, and a second hydraulic cylinder 20 is provided on the other side of the upper end of the bending blade 4. When the bending blade 4 moves longitudinally to complete the bending, the bending of the first hydraulic cylinder 3 and the second hydraulic cylinder 20 can actively drive the bending blade 4 to move longitudinally back and forth.

[0024] In this embodiment, a bending member 5 is provided at the lower end of the bending blade 4. The material to be bent is placed on the upper end of the bending member 5 before bending. A frame 1 is provided outside the bending member 5, the first hydraulic cylinder 3, and the second hydraulic cylinder 20. The frame 1 is fixedly connected to the bending member 5, the first hydraulic cylinder 3, and the second hydraulic cylinder 20 by bolts. The frame 1 can support the structure required for bending, which is convenient for the placement and use of the equipment.

[0025] To improve the stability of the longitudinal movement of the bending blade 4, a limiting frame 2 is provided on one side of the first hydraulic cylinder 3 and the other side of the second hydraulic cylinder 20. The upper end of the limiting frame 2 is fixedly connected to the frame 1 by bolts. A sliding rod 6, which is welded and fixed to the bending blade 4, is provided on the lower end of the outer side of the limiting frame 2 facing the bending blade 4. The outer side of the sliding rod 6 is slidably connected to the inner side of the limiting frame 2. When the bending blade 4 is driven by the longitudinal sliding of the first hydraulic cylinder 3 and the second hydraulic cylinder 20, the sliding rod 6 slides within the limiting frame 2. The combination of the limiting frame 2 and the sliding rod 6 improves the stability of the longitudinal movement of the bending blade 4.

[0026] Furthermore, it is necessary to directly detect the tilt when the bending blade 4 is tilted, such as... Figure 3 As shown, rollers 8 are provided on both the upper and lower ends of the inner side of the limiting frame 2. When the sliding rod 6 moves longitudinally, the rollers 8 will fit against the side of the sliding rod 6 and rotate. The rollers 8 can support the sliding rod 6 and ensure the stability of the movement of the bending blade 4. A connecting frame 9 is provided on the outside of the rollers facing the inner wall of the limiting frame 2. The connecting frame 9 is rotatably connected to the rollers 8. When the sliding rod 6 moves horizontally, the rollers 8 rotate within the connecting frame 9.

[0027] It is worth mentioning that the first movable groove 14 is provided on both sides of the outer side of the limiting frame 2, and the first movable groove 14 extends through and to the inner and outer ends of the limiting frame 2. A storage frame 12 is provided on one side of the outer side of the first movable groove 14, and the storage frame 12 is welded and fixed to the limiting frame 2. A limiting piece 16 is provided on one side of the inner side of the storage frame 12, and the connecting frame 9 extends through the first movable groove 14 and is welded and fixed to the limiting piece 16. When the sliding rod 6 tilts, the tilt of the sliding rod 6 will squeeze the connecting frame 9, causing the connecting frame 9 to slide in the first movable groove 14.

[0028] In addition, a pressing plate 15 is provided on the other side of the storage frame 12, and a pressure sensor 11 is provided on the other side of the pressing plate 15. The pressure sensor 11 detects pressure by passing through the storage frame 12 and connecting to the pressing plate 15. When the connecting frame 9 is squeezed by the inclined sliding rod 6, the limiting plate 16 will move toward the pressing plate 15 and squeeze the pressing plate 15. After squeezing the pressing plate 15 and the pressure sensor 11 detects a large pressure, it is determined whether the sliding rod 6 is tilted.

[0029] To prevent damage to the limiting piece 16 and the pressing piece 15 due to compression, and also to support the sliding rod 6 when it is not tilted, such as Figure 4 and Figure 5As shown, a spring 13 is provided between the limiting piece 16 and the pressing piece 15, and the two ends of the spring 13 are fixedly connected to the pressing piece 15 and the limiting piece 16 respectively by glue. When the limiting piece 16 moves laterally, the spring 13 will push the pressing piece 15. When the sliding rod 6 is not tilted, the spring 13 can make the roller 8 continuously adhere to and support the side of the sliding rod 6.

[0030] In order to alert the user after the pressure sensor 11 detects a large pressure, a buzzer 10 is provided at one end of the storage box 12, and the buzzer 10 is electrically connected to the pressure sensor 11. After the pressure sensor 11 detects a set large pressure value, the pressure sensor 11 gives a start signal to the buzzer 10, which can remind the user of the tilt and clearly inform the user of the current tilt status of the device and the direction in which it is tilted.

[0031] To facilitate the rotation of the roller 8, to facilitate the sliding of the roller 8 on the side of the sliding rod 6, and to facilitate the reduction of the width of the limiting frame 2, the sliding rod 6 has recessed movable rails 7 on both sides facing the roller 8, and the roller 8 is embedded in the movable rails 7. The outer wall of the roller 8 contacts the outer wall of the movable rails 7 on both sides of the sliding rod 6, and the roller 8 continues to rotate within the movable rails 7 when it rotates.

[0032] To address the tilting of the bending blade 4, and to prevent the tilting of the bending blade 4 from causing connection failure between the first hydraulic cylinder 3 and the second hydraulic cylinder 20 and the bending blade 4, and to protect the first hydraulic cylinder 3, the second hydraulic cylinder 20, and the bending blade 4, thus extending their service life, as follows... Figure 6 As shown, the extension / retraction position of the lower end of the second hydraulic cylinder 20 is rotatably connected to the other side of the upper end of the bending blade 4 via the first connecting shaft 17.

[0033] Furthermore, in order to accommodate the connection requirements of the bending blade 4 when tilted, such as Figure 2 and Figure 7 As shown, a second movable groove 21 is provided on one side of the inside of the bending blade 4, corresponding to the lower end of the first hydraulic cylinder 3. A sliding block 18 is provided inside the second movable groove 21, and the outside of the sliding block 18 is slidably connected to the inside of the second movable groove 21. The front and rear ends of the sliding block 18 are rotatably connected to the lower end of the first hydraulic cylinder 3 through a second connecting shaft 19. When the bending blade 4 tilts, the sliding block 18 slides in the second movable groove 21 to adapt, so as to avoid the failure of the connection between the first hydraulic cylinder 3 and the second hydraulic cylinder 20 and the bending blade 4 due to the tilt of the bending blade 4.

[0034] Working principle: When the device is used to bend the material placed on the upper end of the bending member 5, the extension and retraction of the first hydraulic cylinder 3 and the second hydraulic cylinder 20 push the bending blade 4, causing the bending blade 4 to move towards the bending member 5 and achieve the bending of the material. When the sliding rod 6 moves in a longitudinal horizontal position, the sliding rod 6 slides within the limiting frame 2. During the sliding process, the roller 8 slides within the movable rail 7. The spring 13 supports the roller 8, which provides support for the sliding rod 6, allowing the sliding rod 6 to move vertically in a longitudinal horizontal position. When the extension and retraction states of the first hydraulic cylinder 3 and the second hydraulic cylinder 20 are not synchronized, the bending blade 4 will tilt. The second hydraulic cylinder 20 is connected to the bending blade 4. The position rotates around the first connecting shaft 17. The sliding block 18 at the connection position between the first hydraulic cylinder 3 and the bending blade 4 slides in the second movable groove 21. At the same time, the sliding block 18 at the lower end of the first hydraulic cylinder 3 and the bending blade 4 rotate around the second connecting shaft 19. When the bending blade 4 is tilted, the sliding rod 6 will tilt and squeeze the roller 8 in the corresponding direction. After the roller 8 is squeezed, it moves from the connecting frame 9 in the first movable groove 14 toward the inside of the storage frame 12, so that the second connecting shaft 19 is squeezed by the spring 13 to the pressure sensor 11. After the pressure sensor 11 detects the set pressure value, the pressure sensor 11 gives the buzzer 10 a start signal, so that the buzzer 10 starts and reminds the user.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An electro-hydraulic numerical control bending machine servo double pump mechanism, comprising a bending blade (4), first and second hydraulic cylinders (3) and (20) are arranged on both sides of the upper end of the bending blade (4), characterized in that, A limiting frame (2) is provided on one side of the first hydraulic cylinder (3) and the other side of the second hydraulic cylinder (20). A sliding rod (6) is provided at the lower end of the outside of the limiting frame (2). Rollers (8) are provided on both sides of the upper and lower ends inside the limiting frame (2). A connecting frame (9) is rotatably provided on the outside of the rollers (8). A first movable groove (14) is provided on both sides of the outside of the limiting frame (2). A storage frame (12) is provided on one side of the outside of the first movable groove (14). A pressing piece (15) is provided on the other side inside the storage frame (12). A pressure sensor (11) is provided through the storage frame (12) on the other side of the pressing piece (15).

2. The electro-hydraulic digitally controlled bending machine servo double pump mechanism according to claim 1, characterized in that, The first movable groove (14) passes through and extends to both the inner and outer ends of the limiting frame (2). A limiting piece (16) is provided on one side inside the storage frame (12), and the connecting frame (9) passes through the first movable groove (14) and is welded and fixed to the limiting piece (16). A spring (13) is provided between the limiting piece (16) and the pressing piece (15).

3. The electro-hydraulic digitally controlled bending machine servo double pump mechanism according to claim 1, characterized in that, A buzzer (10) is provided at one end of the storage box (12), and the buzzer (10) is electrically connected to the pressure sensor (11).

4. The electro-hydraulic digitally controlled bending machine servo double pump mechanism according to claim 1, characterized in that, The extension and retraction position of the lower end of the second hydraulic cylinder (20) is rotatably connected to the other side of the upper end of the bending blade (4) via the first connecting shaft (17).

5. The electro-hydraulic digitally controlled bending machine servo double pump mechanism according to claim 4, characterized in that, The bending blade (4) has a second movable groove (21) on one side corresponding to the lower end of the first hydraulic cylinder (3), and a sliding block (18) is slidably disposed inside the second movable groove (21).

6. The electro-hydraulic digitally controlled bending machine servo double pump mechanism according to claim 5, characterized in that, The front and rear ends of the sliding block (18) are rotatably connected to the lower end of the first hydraulic cylinder (3) via a second connecting shaft (19).

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