Horizontal numerical control bending machine

Abstract

The application discloses a horizontal numerical control bending machine, which comprises a rack, a working roller group, a numerical control system, a driving working roller arranged at the center of the upper surface of the rack, unloading working rollers and loading working rollers arranged on the left and right sides of the driving working roller, and a pressurizing working roller arranged between the unloading working rollers and the loading working rollers; the position of the driving working roller is fixed; a right-side servo motor drives the loading working rollers to move close to or away from the driving working roller; a left-side servo motor drives the unloading working rollers to move close to or away from the driving working roller; the pressurizing working roller is driven by a pressurizing servo motor to move close to or away from the driving working roller; and the springback compensation working roller group is provided with a left-side springback compensation working roller group and a right-side springback compensation working roller group. The application solves the problem of part precision failure caused by material springback, solves the problem of repeated replacement of the pressure mold, solves the problems of low efficiency and high labor intensity of the traditional manual profile compensation, and greatly improves the processing efficiency.

Description

Technical Field

[0001] This invention relates to a bending machine, and more particularly to a horizontal CNC bending machine. Background Technology

[0002] Currently, depending on the processing requirements of different workpieces, such as their weight and the required shape, vertical or horizontal bending machines are selected. Traditional horizontal bending machines consist of three work rollers. Two of these rollers form a support surface, and the remaining roller applies pressure to this surface, causing the profile to bend. However, during the application of pressure, the work rollers vibrate, and they also rotate. Since the two rollers forming the support surface do not provide any restraint on the profile, the profile on both sides can easily bend due to vibration and misalignment during bending, resulting in processing errors. Because traditional horizontal bending machines only have three work rollers, they are difficult to meet diverse processing requirements and have a limited range of applications.

[0003] A bending machine is a machine capable of bending thin plates or tubular profiles to rounded corners. It includes a support frame, a worktable, a CNC system, and a hydraulic pump. The worktable is placed on the support frame and has cylindrical pressure-applying dies and cylindrical pressure-bearing dies. The worktable also has through holes. The hydraulic pump has a piston rod that moves back and forth. In operation, after being powered on, the hydraulic pump pushes the pressure-applying dies forward, applying pressure to the profile and thus bending it. A disadvantage of existing bending machines is that different sizes and specifications of pressure-applying dies are required when processing profiles of different shapes, necessitating frequent die replacements and reducing production efficiency. Since the roll bending process involves elastic-plastic deformation of the material, springback is unavoidable. This springback manifests as the return of the bending angle and radius of curvature after forming. Springback affects the final shape and dimensional accuracy of the part, causing it to fail to meet precision requirements.

[0004] Research on roll bending forming technology in China started relatively late, and competing products cannot reach the level of foreign products. In recent years, many domestic civil aircraft companies have successively introduced high-end profile roll bending equipment from abroad for production. However, because the core technology of the control system is still in the hands of foreign companies, many aircraft roll bending parts still cannot be produced independently and need to be imported, which makes them dependent on others and seriously affects the development progress of new products. Summary of the Invention

[0005] The technical problems to be solved by this invention are: the instability and relatively large errors in the processing of profiles by traditional horizontal bending machines; the failure of parts to meet accuracy requirements due to material springback; the need for repeated replacement of pressure dies; and the low efficiency and high labor intensity of traditional manual profile feeding.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical means:

[0007] A horizontal CNC bending machine includes a frame, a set of work rollers, and a CNC system. An active work roller is arranged at the center of the upper surface of the frame, and unloading work rollers and loading work rollers are arranged on the left and right sides of the active work roller. A pressure work roller is arranged between the unloading work roller and the loading work roller.

[0008] The active working roller is fixed in position; the loading working roller is located to the right of the active working roller, and a right servo motor drives the loading working roller to move closer to or away from the active working roller to adjust its position; the unloading working roller is located to the left of the active working roller, and a left servo motor drives the unloading working roller to move closer to or away from the active working roller to adjust its position; the pressure working roller is driven to move closer to or away from the active working roller by a pressure servo motor to adjust its position; a springback compensation working roller group is set outside the unloading working roller and the loading working roller, and the springback compensation working roller group includes a left springback compensation working roller group and a right springback compensation working roller group;

[0009] The upper surface of the frame is equipped with an active work roller base, a loading work roller support plate, and an unloading work roller support plate. The active work roller base is connected to the active work roller. The loading and unloading work roller support plates are arranged in a V-shape, with a pressure roller mounting area between them. The loading work roller support plate is located on one side of the active work roller base and consists of two spaced-apart plates. Loading guide rails are provided on the inner sidewalls of the two spaced-apart unloading work roller support plates to connect and mount the loading work roller. On the opposite side of the active work roller base, symmetrical to the loading work roller support plate, is an unloading work roller support plate, arranged in the same way as the loading work roller support plate. The loading, unloading, and active work roller bases are integrally formed.

[0010] The right-side springback compensation work roller group is equipped with a right-side springback compensation roller and a right-side auxiliary bending fixed support plate. The right-side auxiliary bending fixed support plate is set parallel to the upper surface of the frame for rolling support of the workpiece being processed. A right-side springback compensation roller is set at the right-side auxiliary bending fixed support plate. The axes of the right-side auxiliary bending fixed support plate and the right-side springback compensation roller are set perpendicularly. The right-side springback compensation roller is set directly above the right-side auxiliary bending fixed support plate and presses against the workpiece being processed to prevent it from springing back and deforming. The structure and working principle of the left-side springback compensation work roller group and the right-side springback compensation work roller group are the same.

[0011] The advantages of this invention are:

[0012] First: The working gap of the bending process can be changed by moving the loading work roll, unloading work roll, and pressure work roll, thereby adapting to different processing needs and processing different shapes.

[0013] Second: The pressure working roller exerts a corrective force on the workpiece to prevent springback, increases the plastic deformation in the deformation zone, changes the stress distribution, thereby reducing springback, improving the machining accuracy of the parts, ensuring machining safety, and improving the stability of the device.

[0014] Third: By setting up a right-side springback compensation roller and a right-side auxiliary rolling bending fixed support plate, the right-side springback compensation roller and the right-side auxiliary rolling bending fixed support plate work together to support and limit the workpiece being processed to prevent the profile from springing back and deforming; the structure and working principle of the left-side springback compensation working roller group and the right-side springback compensation working roller group are the same.

[0015] Fourth: The active work roller base, loading work roller support plate, and unloading work roller support plate on the upper surface of the frame are integrally formed, which makes the connection and fixation of the active work roller, the active work roller and the pressure work roller more stable, reduces the deviation of positional changes caused by temperature and other environmental factors when the components are connected separately, facilitates the improvement of processing accuracy in working conditions, and also facilitates the adjustment of relative positions.

[0016] As a preferred embodiment, a further technical solution of the present invention is:

[0017] The loading work roller is mounted on a collar, which is installed on a loading guide rail. The loading work roller is connected to the right-side servo motor through the collar. The right-side servo motor drives the loading work roller to move along the loading guide rail closer to or further away from the active work roller to adjust its position. The unloading work roller is set in the same way as the loading work roller.

[0018] A collar is installed to ensure stability during processing. The two driven work rollers, the loading work roller and the unloading work roller, move along the guide rail and are limited by the guide rail, thereby improving the adjustment accuracy.

[0019] The right-side springback compensation roller and the right-side auxiliary rolling bending fixed support plate are both mounted on the right-side auxiliary rolling bending slider. The right-side auxiliary rolling bending servo motor drives the right-side auxiliary rolling bending ball screw, which in turn drives the right-side auxiliary rolling bending slider. The right-side auxiliary rolling bending slider then moves the right-side springback compensation roller and the right-side auxiliary rolling bending fixed support plate to change their positions. The right-side springback compensation working roller group is mounted on the support shaft. The right-side auxiliary rolling bending hydraulic rod drives the support shaft to rotate, and the rotation of the support shaft causes the right-side springback compensation roller and the right-side auxiliary rolling bending fixed support plate to rotate and adjust their positions along with the support shaft.

[0020] The springback compensation roller and the right-side auxiliary bending fixed support plate are mounted on the slider. By driving the slider, the position can be adjusted along the right-side auxiliary bending ball screw. Simultaneously, the right-side springback compensation working roller assembly is mounted on the support shaft. As the support shaft rotates, the springback compensation roller rotates with the support shaft to adjust its position. This accommodates the need for different working positions for different profiles and processing angles. During position adjustment, the circle containing the springback compensation roller is always adjusted to tangential contact with the workpiece being processed.

[0021] The frame is also equipped with a torsion device, which includes a torsion motor, a coupling, a locking block, a worm, and a worm wheel. The torsion motor drives the worm through the coupling, and the worm drives the worm wheel to rotate. A locking block is located at the center of the worm wheel, and torsion holes are provided between the locking blocks. The workpiece to be processed is inserted into the torsion holes and is limited by the locking blocks.

[0022] When the torsion device is working, as the material passes through the inlet, the locking block locks the material in place. Then, the torsion motor starts, and the worm gear rotates under the drive of the coupling. Simultaneously, the worm wheel is driven to rotate by the worm gear, causing the material to undergo torsional deformation under the action of the locking block and the worm wheel. This configuration allows the invention to possess both bending and torsional functions.

[0023] The aforementioned torsion device also includes a torsion box and a torsion end cover. The worm and worm wheel are installed inside the torsion box. A torsion end cover is provided on one side of the torsion box, and a torsion motor is connected and fixed at the torsion end cover.

[0024] The torsion housing and torsion end cap facilitate the connection and installation of the torsion motor.

[0025] The left springback compensation roller is mounted on the left bending slider. The movement of the left bending slider is the same as that of the right bending slider. The left springback compensation roller can move along with the left bending slider, thereby changing the working position. This linkage provides a more comprehensive processing method for the torsion device.

[0026] The torsion device is positioned directly above the chassis, reducing the need for supporting components.

[0027] The pressure working roller is mounted on a support sleeve and is hinged to the support shaft of the pressure working roller. The pressure servo motor drives the support sleeve to rotate around the support shaft of the pressure working roller, causing the pressure working roller to move closer to or away from the active working roller. The support shaft of the pressure working roller is installed inside the frame.

[0028] With the above settings, the pressure working roller can not only be adjusted by being driven by the pressure servo motor to move closer to or further away from the active working roller, but its position can also be adjusted by rotation, thus better meeting the needs of the work.

[0029] The lead screw passes through the slider and is mounted on the guide rail, enabling the auxiliary bending mechanism to move along the guide rail. The rollers on the springback compensation bending mechanism can rotate arbitrarily on the material processing plane. According to the springback trend of the profile after bending and forming, the profile can be bent again to strengthen it, thereby adapting to the processing of various material shapes to meet various work needs and greatly improving the availability of the device. Attached Figure Description

[0030] Figure 1 This is an exploded view of a specific embodiment of the present invention.

[0031] Figure 2 This is an exploded view of a specific embodiment of the present invention.

[0032] Figure 3 This is an exploded view of a specific embodiment of the present invention.

[0033] Figure 4 This is a schematic diagram of a specific embodiment of the present invention.

[0034] Figure 5 This is a schematic diagram of a specific embodiment of the present invention.

[0035] Figure 6 This is a perspective view of a specific embodiment of the present invention.

[0036] Explanation of reference numerals in the attached diagram: 1 - Driven work roller; 2 - Unloading work roller; 3 - Pressure work roller; 4 - Loading work roller; 5 - Pressure servo motor; 6 - Loading guide rail; 7 - Right auxiliary bending slider; 8 - Right springback compensation roller; 9 - Right auxiliary bending sleeve; 10 - Right springback compensation work roller assembly; 11 - Driven roller servo motor; 12 - Driven roller sleeve; 13 - Support collar; 14 - Left springback compensation roller; 15 - Left auxiliary bending slider; 16 - Right auxiliary bending guide rail; 17 - Right auxiliary bending fixed support plate; 18 - Left auxiliary bending fixed support plate; 19 - Left auxiliary... Roll bending guide rail; 20 - Left side springback compensation working roller group; 21 - Right side auxiliary roll bending hydraulic rod; 22 - Left side auxiliary roll bending hydraulic rod; 23 - Right side servo motor; 24 - Left side servo motor; 25 - Right side auxiliary roll bending servo motor; 26 - Right side auxiliary roll bending ball screw; 27 - Left side auxiliary roll bending ball screw; 28 - Left side roll bending servo motor; 29 - Housing shell; 30 - Lifting eye screw; 31 - Frame heat sink; 32 - Support base; 33 - Torsion motor; 34 - Coupling; 35 - Torsion end cover; 36 - Torsion housing; 37 - Clamping block; 38 - Worm gear; 39 - Worm wheel. Detailed Implementation

[0037] The present invention will be further described below with reference to the embodiments.

[0038] See Figure 1As can be seen, the present invention provides a horizontal CNC bending machine, including a frame, a set of work rollers, and a CNC system; an active work roller 1 is arranged at the center of the upper surface of the frame, the active work roller 1 is driven by an active roller servo motor 11, an unloading work roller 2 and a loading work roller 4 are arranged on the left and right sides of the active work roller 1, and a pressure work roller 3 is arranged between the unloading work roller 2 and the loading work roller 4; the active work roller 1 is positioned at the center of the upper surface of the frame, and the active roller sleeve 12 on which the active work roller 1 is installed is locked by bolts, so that the position of the active roller sleeve cannot be moved, and the active work roller 1 rotates to work.

[0039] The loading work roller 4 is located to the right of the active work roller 1. The loading work roller 4 is mounted on a collar, which is installed on the loading guide rail 6. The loading work roller 4 is connected to the right servo motor 23 through the collar. The right servo motor 23 drives the loading work roller 4 to move along the loading guide rail 6 to move closer to or further away from the active work roller 1 to adjust its position.

[0040] The unloading work roller 2 is located to the left of the active work roller 1. The unloading work roller 2 is mounted on a collar, which is installed on the unloading guide rail. The unloading work roller 2 is connected to the left servo motor 24 through the collar. The left servo motor 24 drives the unloading work roller 2 to move along the unloading guide rail closer to or further away from the active work roller 1 to adjust its position.

[0041] The pressure working roller 3 is mounted on the support collar 13 and is hinged to the support shaft of the pressure working roller. The pressure servo motor 5 drives the support collar 13 to rotate around the support shaft of the pressure working roller, causing the pressure working roller 3 to move closer to or away from the active working roller 1. The support shaft of the pressure working roller is installed inside the frame.

[0042] The upper surface of the frame is provided with an active work roller base, a loading work roller support wall, and an unloading work roller support wall. The active work roller base is connected to the active work roller 1. The loading work roller support wall and the unloading work roller support wall are arranged in a V-shape. The area between the loading work roller support wall and the unloading work roller support wall is the pressure roller installation area. The loading work roller support wall is located on one side of the active work roller base. There are two loading work roller support walls, which are spaced apart. The inner side walls of the two spaced unloading work roller support walls are provided with loading guide rails 6, which are used to connect and install the loading work roller 4. The unloading work roller support wall is located on the opposite side of the active work roller base, symmetrical to the loading work roller support wall. The arrangement of the unloading work roller support wall is the same as that of the loading work roller support wall. The loading work roller support wall, the unloading work roller support wall, and the active work roller base are integrally formed.

[0043] The right-side springback compensation working roller group 10 is equipped with a right-side springback compensation roller 8 and a right-side auxiliary bending fixed support plate 17, both of which are mounted on the right-side auxiliary bending slider 7. A right-side auxiliary bending servo motor 25 drives a right-side auxiliary bending ball screw 26, which in turn drives the right-side auxiliary bending slider 7. The right-side auxiliary bending slider 7 then moves the right-side springback compensation roller 8 and the right-side auxiliary bending fixed support plate 17 to change their positions. The right-side springback compensation working roller group is mounted on a support shaft, and a right-side auxiliary bending hydraulic rod 21 drives the support shaft to rotate. The top of the support shaft is connected to the frame via a right-side auxiliary bending sleeve 9. The rotation of the support shaft causes the right-side springback compensation roller 8 and the right-side auxiliary bending fixed support plate 17 to rotate and adjust their positions. This accommodates the different working positions required for different profiles and processing angles. When adjusting the position, the circle containing the contact point of the right-side springback compensation roller 8 is adjusted to tangential contact with the workpiece being processed.

[0044] The left springback compensation work roller group 20 is equipped with a left springback compensation roller 14, a left auxiliary bending slider 15, a left auxiliary bending fixed support plate 18, a left auxiliary bending guide rail 19, a left auxiliary bending hydraulic rod 22, a left auxiliary bending ball screw 27, and a left bending servo motor 28. The left springback compensation work roller group 20 and the right springback compensation work roller group 10 have the same structure and working principle.

[0045] The side wall panel of the outer casing 29 is a rack heat dissipation plate 31, which has heat dissipation holes for easy heat dissipation; the outer casing 29 is provided with two spaced eye bolts 30 for easy connection and fixation. A support base 32 is provided on the bottom surface of the outer casing 29, which supports the outer casing 29.

[0046] A torsion device is installed above the outer shell 29 of the housing. The torsion device consists of a torsion motor 33, a coupling 34, a torsion end cover 35, a torsion housing 36, a locking block 37, a worm 38, and a worm wheel 39. The torsion motor 33 drives the worm 38 through the coupling 34. The worm 38 drives the worm wheel 39 to rotate. The center of the worm wheel 39 is provided with a locking block 37. A torsion hole is provided between the locking blocks 37. The workpiece to be processed is inserted into the torsion hole and is limited by the locking block 37. The worm 38 and the worm wheel 39 are set inside the torsion housing 36. A torsion end cover 35 is provided on one side of the torsion housing 36. The torsion motor 33 is connected and fixed at the torsion end cover 35.

[0047] The left springback compensation roller 14 is mounted on the left rolling slider 15. The movement mode of the left rolling slider 15 is the same as that of the right rolling slider 7. The left springback compensation roller 14 can move with the left rolling slider 15, thereby changing the working position. This linkage provides a more comprehensive processing method for the torsion device.

[0048] The working principle and process of this device are as follows:

[0049] When the horizontal CNC bending machine is working, relevant codes need to be entered into the CNC system interface. After confirming the motion simulation is correct, the bending machine is started. The material to be processed is placed on the worktable and positioned within the working gap formed by the active work roller 1, unloading work roller 2, loading work roller 4, and pressure work roller 3 using an auxiliary fixture. During processing, the feed rate of the left servo motor 24, right servo motor 23, and pressure servo motor 5 is controlled by the terminal control of the CNC system to adjust the working gap within the fourth roller forming mechanism. The rotation of the active work roller 1 drives the material feed, thereby automatically completing the initial processing of the profile. Due to the springback characteristics of the material, springback compensation of the profile is particularly important. Since the left and right mechanisms are the same and the adjustment methods are the same, the adjustment of the right mechanism is taken as an example. The CNC system controls the servo motor 25 to control the right auxiliary rolling bending slider 7 to move along the right auxiliary rolling bending guide rail 16, and the entire auxiliary rolling bending device can rotate around its central axis under the drive of the right auxiliary rolling bending power output device 9. The position of the right-side springback compensation roller 8 can be adjusted as required, so that the right-side springback compensation roller 8 can complete the springback compensation of the profile in the correct position.

[0050] When the torsion device is working, when the material passes through the inlet of the torsion device, the locking block 37 locks the material in place. Then, the torsion motor 33 starts, and the worm 38 rotates under the drive of the coupling 34. At the same time, the worm wheel 39 is driven to rotate by the worm. The material undergoes torsional deformation under the action of the locking block 37 and the worm wheel 39. The above configuration gives this embodiment both bending and torsion functions.

Claims

1. A horizontal CNC bending machine, comprising a frame, a work roller group, and a CNC system, characterized in that: An active working roller (1) is provided at the center of the upper surface of the frame. An unloading working roller (2) and a loading working roller (4) are provided on the left and right sides of the active working roller (1). A pressure working roller (3) is provided between the unloading working roller (2) and the loading working roller (4). The active working roller (1) is fixed in position; the loading working roller (4) is set to the right of the active working roller (1), and the right servo motor (23) drives the loading working roller (4) to move closer to or away from the active working roller (1) to adjust its position; the unloading working roller (2) is set to the left of the active working roller (1), and the left servo motor (24) drives the unloading working roller (2) to move closer to or away from the active working roller (1) to adjust its position; the pressure working roller (3) is driven closer to or away from the active working roller (1) by the pressure servo motor (5) to adjust its position; a springback compensation working roller group is set on the outside of the unloading working roller (2) and the loading working roller (4), and the springback compensation working roller group includes a left springback compensation working roller group and a right springback compensation working roller group; The upper surface of the frame is provided with an active work roller seat, a loading work roller support wall, and an unloading work roller support wall. The active work roller seat is connected to the active work roller (1). The loading work roller support wall and the unloading work roller support wall are arranged in a figure-eight shape. The area between the loading work roller support wall and the unloading work roller support wall is the pressure roller installation area. The loading work roller support wall is set on one side of the active work roller seat. There are two loading work roller support walls, which are spaced apart. The inner side walls of the two spaced unloading work roller support walls are provided with loading guide rails (6). The loading guide rails (6) are used to connect and set the loading work roller (4). The unloading work roller support wall is provided on the other side of the active work roller seat, which is symmetrical to the loading work roller support wall. The setting of the unloading work roller support wall is the same as that of the loading work roller support wall. The loading work roller support wall, the unloading work roller support wall, and the active work roller seat are integrally formed. The right-side springback compensation working roller group is provided with a right-side springback compensation roller (8) and a right-side auxiliary rolling bending fixed support plate (17). The right-side springback compensation roller (8) is provided at the right-side auxiliary rolling bending fixed support plate (17). The axes of the right-side auxiliary rolling bending fixed support plate (17) and the right-side springback compensation roller (8) are vertically arranged. The right-side springback compensation roller (8) is located directly above the right-side auxiliary rolling bending fixed support plate (17). The right-side springback compensation roller (8) presses against the workpiece to prevent it from springing back and deforming. The left and right springback compensation work roller groups have the same structure and working principle.

2. The horizontal CNC bending machine according to claim 1, characterized in that: The loading work roller (4) is set on the collar, which is installed on the loading guide rail (6). The loading work roller (4) is connected to the right servo motor (23) through the collar. The right servo motor (23) drives the loading work roller (4) to move along the loading guide rail (6) to approach or move away from the active work roller (1) to adjust its position. The unloading work roller (2) is set in the same way as the loading work roller (4).

3. The horizontal CNC bending machine according to claim 1, characterized in that: The right-side springback compensation roller (8) and the right-side auxiliary rolling bending fixed support plate (17) are both installed on the right-side auxiliary rolling bending slider (7); the right-side auxiliary rolling bending servo motor (25) drives the right-side auxiliary rolling bending ball screw (26), the right-side auxiliary rolling bending ball screw (26) drives the right-side auxiliary rolling bending slider (7), and the right-side auxiliary rolling bending slider (7) drives the right-side springback compensation roller (8) and the right-side auxiliary rolling bending fixed support plate (17) to move and change position; the right-side springback compensation working roller group is set on the support shaft, and the right-side auxiliary rolling bending hydraulic rod (21) drives the support shaft to rotate, and the rotation of the support shaft drives the right-side springback compensation roller (8) and the right-side auxiliary rolling bending fixed support plate (17) to rotate and adjust position with the rotation of the support shaft.

4. The horizontal CNC bending machine according to claim 1, characterized in that: The frame is also equipped with a torsion device, which includes a torsion motor (33), a coupling (34), a locking block (37), a worm (38), and a worm wheel (39). The torsion motor (33) drives the worm (38) through the coupling (34), and the worm (38) drives the worm wheel (39) to rotate. The worm wheel (39) has a locking block (37) at its center, and there are torsion holes between the locking blocks (37). The workpiece to be processed is inserted into the torsion hole and is limited by the locking block (37).

5. The horizontal CNC bending machine according to claim 4, characterized in that: The torsion device is further provided with a torsion box (36) and a torsion end cover (35). The worm (38) and worm wheel (39) are arranged inside the torsion box (36). A torsion end cover (35) is provided on one side of the torsion box (36), and a torsion motor (33) is connected and fixed at the torsion end cover (35).

Images