High-precision full-electric servo direct-drive numerical control bending machine

Abstract

This invention discloses a high-precision all-electric servo direct-drive CNC bending machine, relating to the field of CNC bending machine technology. It includes a frame and a worktable. The worktable is mounted on the front side of the outer wall of the frame, and a slide is mounted on the front side of the outer wall of the worktable. A sliding groove is installed at the connection between the slide and the worktable. A support plate is mounted on the upper side of the outer wall of the slide, and a support rod is mounted on the lower side of the outer wall of the support plate. The support rod is connected to a motor mounted on the lower side of the inner wall of the slide via a ball screw. A pressure plate is mounted on the upper side of the outer wall of the support plate, and the pressure plate is connected to a motor mounted on the upper side of the outer wall of the slide via a ball screw. A harmonic reducer is mounted on the upper side of the outer wall of the pressure plate. This invention, by installing the support plate, support rod, and pressure plate, achieves the function of fine-tuning the workpiece bending parameters, solving the problems of workpiece damage during fine-tuning, impact on continuous production, and errors introduced by secondary workpiece clamping. It can eliminate positioning errors and improve production efficiency.

Description

Technical Field

[0001] This invention relates to the field of CNC bending machine technology, specifically a high-precision all-electric servo direct-drive CNC bending machine. Background Technology

[0002] With the development of technology, the efficiency and precision requirements for metal sheet processing have increased. Traditional bending machines use molds to perform air bending, bottom bending, or edge rolling on the sheet metal to form complex geometric structures such as U-shapes and C-shapes, meeting the precision component requirements of industries such as wind power generation and high-speed trains. Compared with traditional bending machines, all-electric servo direct drive CNC bending machines use servo motors to directly drive ball screws, which not only improves transmission efficiency but also reduces energy consumption, enabling metal sheet processing with higher response speed and higher stability.

[0003] During the workpiece processing, factors such as mold wear, material properties, and equipment errors can cause deviations in the accuracy of the finished workpiece. Secondary processing and fine-tuning of the workpiece are required. If the workpiece is removed, it needs to be repositioned, which can easily cause deviations. Moreover, when existing equipment is corrected, the main processing flow needs to be paused, which affects the continuity of equipment processing and leads to a decrease in equipment processing efficiency.

[0004] Patent CN110280631B discloses a mechanical all-electric servo CNC bending machine based on multi-degree-of-freedom coupled drive. The above patent achieves advantages such as being suitable for large tonnage and having heavy load, high precision, low energy consumption, small drive motor power, high power utilization, fast speed and low manufacturing cost.

[0005] The aforementioned patent utilizes the nonlinear motion characteristics of linkage mechanisms and the self-locking characteristics of specific positions or the self-locking characteristics of threaded transmission. Based on the actual working conditions of CNC bending machines, it employs two drive mechanisms to achieve the rapid descent, rapid advance, and return movements of the bending machine. The rapid descent and return movements are achieved using a fast, low-load, and long-stroke drive mechanism, while the workpiece bending is achieved using a slow, short-stroke, and heavy-load drive mechanism. This effectively improves performance, reduces costs, and enables high-speed, heavy-load operation, while also providing room for optimization in workpiece fine-tuning accuracy.

[0006] Therefore, this application proposes a high-precision all-electric servo direct-drive CNC bending machine for fine-tuning workpiece bending parameters. Summary of the Invention

[0007] The purpose of this invention is to provide a high-precision all-electric servo direct-drive CNC bending machine to solve the technical problems of poor workpiece fine-tuning accuracy and impact on production continuity mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a high-precision all-electric servo direct-drive CNC bending machine, comprising a frame and a worktable. A worktable is mounted on the front side of the outer wall of the frame, and a slide is mounted on the front side of the outer wall of the worktable. A sliding groove is installed at the connection between the slide and the worktable. A support plate is mounted on the upper side of the outer wall of the slide, and a support rod is mounted on the lower side of the outer wall of the support plate. The support rod is connected to a motor 1 mounted on the lower side of the inner wall of the slide via a ball screw. A pressure plate 1 is mounted on the upper side of the outer wall of the support plate, and the pressure plate 1 is connected to a motor 2 mounted on the upper side of the outer wall of the slide via a ball screw. A harmonic reducer is mounted on the upper side of the outer wall of the pressure plate 1, and the harmonic reducer is connected to a motor 3 mounted on the right side of the outer wall of the slide via a transmission shaft. Scanners are mounted on both the left and right sides of the outer wall of the pressure plate 1. Motors 1, 2, and 3, and the scanners are respectively connected to a controller mounted on the left side of the outer wall of the worktable via signal lines.

[0009] Preferably, a fixing unit is installed on both the left and right sides of the outer wall of the first pressure plate. The fixing unit consists of a second pressure plate, a gasket, an infrared sensor, and a fourth motor. The second pressure plate is installed on both the left and right sides of the outer wall of the first pressure plate. A gasket is installed on the lower side of the outer wall of the second pressure plate. The gasket is made of non-metallic soft material. Infrared sensors are installed on both the front and rear sides of the outer wall of the gasket. The fourth motor is installed on the rear side of the outer wall of the second motor. The second pressure plate is connected to the fourth motor through a transmission shaft. The infrared sensor and the fourth motor are respectively connected to the controller through signal lines.

[0010] Preferably, a T-slot is provided on the upper side of the outer wall of the workbench, a lower mold is installed in the T-slot, a guide rail is installed on the front side of the outer wall of the lower mold, a slider is installed on the upper side of the outer wall of the guide rail, a baffle is installed on the rear side of the outer wall of the slider, a pressure sensor is embedded in the outer wall of the baffle near the lower mold, a clamping block is installed on the outer wall of the slider near the slide table, and a motor is installed on the lower side of the outer wall of the guide rail. The slider and the clamping block are respectively connected to the motor via a drive shaft, and the motor and the pressure sensor are respectively connected to the controller via signal lines.

[0011] Preferably, a guide rail 2 is installed in the middle of the inner wall of the worktable, and a movable stage is installed on the upper side of the outer wall of the guide rail 2. The movable stage is rigidly connected to the slide table through a fixed shaft. A push rod is installed on the upper side of the outer wall of the movable stage. The push rod is connected to a motor 6 installed in the middle of the inner wall of the movable stage through a ball screw. A grating ruler 1 is installed on the inner wall of the worktable near the movable stage. A top block is installed on the upper side of the outer wall of the push rod. The top block is made of wear-resistant material. The upper surface of the top block is in contact with the lower surface of the lower mold. The motor 6 and the grating ruler 1 are respectively connected to the controller through signal lines.

[0012] Preferably, an upper mold is installed on the upper side of the outer wall of the lower mold, and a compensation block 1 is installed on the upper side of the inner wall of the upper mold. The compensation block 1 is connected to a motor 7 installed on the upper side of the inner wall of the upper mold via a ball screw. A compensation block 2 is installed on the upper side of the inner wall of the lower mold, and motors 8 are installed on both the left and right sides of the inner wall of the lower mold. The compensation block 2 is connected to motors 8 via ball screws. A slider 2 is installed on the upper side of the outer wall of the upper mold, and the upper mold and slider 2 are mechanically locked together by a clamping plate. A grating ruler 2 is installed on the outer wall of the frame near the slider 2. The slider 2 is connected to a motor 9 installed on the upper side of the outer wall of the frame via a ball screw. Motors 7, 8, grating ruler 2, and 9 are respectively connected to the controller via signal lines.

[0013] Preferably, a grating ruler three is installed on the front side of the inner wall of the slide table, and the grating ruler three is parallel to the support rod. A grating ruler four is installed on the outer wall of the slide table near the pressure plate one, and the grating ruler four is parallel to the ball screw connecting the pressure plate one and the motor two. The grating ruler three and the grating ruler four are respectively connected to the controller through signal lines.

[0014] Preferably, a motor is installed on the front side of the inner wall of the worktable, a slider is installed on the inner wall of the sliding groove, the slider is rigidly connected to the slide table through a fixed shaft, the slider is connected to the motor through a ball screw, limit blocks are installed on both the left and right sides of the outer wall of the sliding groove, and a grating ruler is installed on the outer wall of the worktable near the slide table. The motor and the grating ruler are respectively connected to the controller through signal lines.

[0015] Preferably, the ball screw connecting the support rod to motor one and the ball screw connecting the pressure plate one to motor two are coaxial.

[0016] Preferably, both the lower mold and the upper mold are segmented designs.

[0017] Preferably, the first compensation block is a wedge-shaped structure, and the second compensation block is a left-right symmetrical wedge-shaped structure.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention, by installing a support plate, a support rod, and a pressure plate, enables the fine-tuning of workpiece bending parameters, solves the problems of workpiece damage during fine-tuning, impact on continuous production, and errors introduced by secondary workpiece clamping, eliminates positioning errors, improves the one-time forming rate of workpieces, and increases production efficiency;

[0020] 2. This invention achieves precise workpiece positioning by installing a second pressure plate, a first slider, a baffle, and a clamping block. It solves the problems of unstable workpiece fixing, workpiece displacement, decreased bending accuracy, and low fine-tuning efficiency. It can dynamically adjust the clamping force on the workpiece, reduce the workpiece rework rate, and improve the consistency of finished products.

[0021] 3. This invention, by installing a top rod, a top plate, and a moving table, realizes the function of intelligent deflection control, solves the problems of abnormal mold wear and decreased bending accuracy, eliminates bending deviation caused by deflection deformation, improves the bending accuracy of the equipment, and extends the service life of the equipment;

[0022] 4. This invention, by installing an upper mold, a lower mold, a compensation block one, and a compensation block two, achieves the function of adapting to the bending requirements of different materials, solves the problems of low workpiece adaptability, high maintenance costs, and insufficient material springback compensation, and can optimize local pressure according to different workpiece thicknesses, thereby improving the bending accuracy and stability of the workpiece and increasing the processing efficiency of the equipment. Attached Figure Description

[0023] Figure 1 This is a front view structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the slide structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the pressure plate structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the frame and workbench of the present invention;

[0027] Figure 5 This is a schematic diagram of the three structures of the moving stage and the slider of the present invention;

[0028] Figure 6 This is a schematic diagram of the lower mold structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the upper mold structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the limiting block and grating ruler of the present invention.

[0031] In the diagram: 1. Frame; 2. Worktable; 3. Slide table; 4. Sliding groove; 5. Support plate; 6. Support rod; 7. Motor 1; 8. Pressure plate 1; 9. Motor 2; 10. Harmonic reducer; 11. Motor 3; 12. Scanner; 13. Controller; 14. Pressure plate 2; 15. Shim; 16. Infrared sensor; 17. Motor 4; 18. Lower mold; 19. Guide rail 1; 20. Slider 1; 21. Baffle; 22. Pressure sensor; 23. Clamping block; 24. Electric... 25. Guide rail 2; 26. Moving table; 27. Fixed shaft; 28. Top rod; 29. ​​Motor 6; 30. Grating ruler 1; 31. Top block; 32. Upper mold; 33. Compensation block 1; 34. Motor 7; 35. Compensation block 2; 36. Motor 8; 37. Slider 2; 38. Clamping plate; 39. Grating ruler 2; 40. Motor 9; 41. Grating ruler 3; 42. Grating ruler 4; 43. Motor 10; 44. Slider 3; 45. Limiting block; 46. Grating ruler 5. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 8 A high-precision all-electric servo direct-drive CNC bending machine includes a frame 1 and a worktable 2. The worktable 2 is mounted on the front side of the outer wall of the frame 1, and a slide 3 is mounted on the front side of the outer wall of the worktable 2. A sliding groove 4 is installed at the connection between the slide 3 and the worktable 2. A support plate 5 is mounted on the upper side of the outer wall of the slide 3, and a support rod 6 is mounted on the lower side of the outer wall of the support plate 5. The support rod 6 is connected to a motor 7 mounted on the lower side of the inner wall of the slide 3 via a ball screw. A [missing information - likely a concave or convex structure] is mounted on the upper side of the outer wall of the support plate 5. Pressure plate 8 is connected to motor 9, which is mounted on the upper side of the outer wall of slide table 3, via a ball screw. Harmonic reducer 10 is mounted on the upper side of the outer wall of pressure plate 8. Harmonic reducer 10 is connected to motor 11, which is mounted on the right side of the outer wall of slide table 3, via a transmission shaft. Scanners 12 are mounted on both the left and right sides of the outer wall of pressure plate 8. Motor 7, motor 9, motor 11 and scanner 12 are respectively connected to controller 13, which is mounted on the left side of the outer wall of worktable 2, via signal lines.

[0036] A grating ruler 3 41 is installed on the front side of the inner wall of the slide table 3. The grating ruler 3 41 is parallel to the support rod 6. A grating ruler 42 is installed on the outer wall of the slide table 3 near the pressure plate 1 8. The grating ruler 42 is parallel to the ball screw connecting the pressure plate 1 8 and the motor 2 9. The grating ruler 3 41 and the grating ruler 42 are respectively connected to the controller 13 through signal lines.

[0037] A motor 43 is installed on the front side of the inner wall of the worktable 2. A slider 44 is installed on the inner wall of the sliding groove 4. The slider 44 is rigidly connected to the slide table 3 through a fixed shaft 27. The slider 44 is connected to the motor 43 through a ball screw. Limit blocks 45 are installed on both the left and right sides of the outer wall of the sliding groove 4. A grating ruler 46 is installed on the outer wall of the worktable 2 near the slide table 3. The motor 43 and the grating ruler 46 are respectively connected to the controller 13 through signal lines.

[0038] The ball screw connecting the support rod 6 to the motor 7 and the ball screw connecting the pressure plate 8 to the motor 9 are coaxial.

[0039] Furthermore, after the workpiece is processed on the worktable 2, it remains fixed on the worktable 2. The formed edge of the workpiece after bending falls within the working range of the slide table 3, eliminating the need for secondary clamping, flipping, and movement. This avoids the decrease in accuracy caused by positioning errors. While the worktable 2 processes the next workpiece, the controller 13 controls the motor 10 43 to drive the slider 3 44 along the sliding groove 4 via a ball screw. The slider 3 44 drives the slide table 3 to move left and right along the worktable 2 via the fixed shaft 27 connecting the slide table 3 and the slider 3 44, i.e., along the bending line. During the movement of the slide table 3, the movement information of the slide table 3 is collected by the grating ruler 5 46, thereby obtaining the position information of the slide table 3 and transmitting it to the controller 13. 3. During the movement, the scanner 12 scans the workpiece to obtain the actual bending angle, bending size, and geometric tolerance information of each position of the workpiece. The scanner 12 transmits the obtained workpiece bending information to the controller 13. The controller 13 compares the actual bending information of the workpiece with the preset target bending parameters of the workpiece. If there is a deviation between the bending information at a certain position and the preset parameters, the controller 13 uses the motor 10 43 to drive the slider 3 44 to move the slide table 3 to the position with the deviation, and performs fine adjustment of the workpiece. Based on the deviation between the workpiece information collected by the scanner 12 and the preset parameters, the controller 13 calculates the target height of the support plate 5, the target swing angle of the pressure plate 8, and the target downward pressure of the pressure plate 8. The controller 13 then controls the movement. Motor 7 drives support rod 6 to move vertically up and down via ball screw, moving support plate 5 to the target height. Grating ruler 41 collects the actual height data of support rod 6 to prevent deviations in height adjustment. Controller 13 controls motor 11 to drive harmonic reducer 10 via drive shaft. Under the drive of harmonic reducer 10, the angle of pressure plate 8 is adjusted to match the target angle of the workpiece's bending angle in the area to be fine-tuned, ensuring that pressure plate 8 can fully fit the workpiece. Subsequently, controller 13 controls motor 9 to move pressure plate 8 downward via ball screw. Grating ruler 42 collects the displacement data of pressure plate 8, and pressure plate 8 is used to fine-tune the bending deviation area of ​​the workpiece. Under the combined action of the pressure plate 8, the workpiece is bent at a fixed point for correction. After the correction is completed, the controller 13 controls the motor 9 to drive the pressure plate 8 to reset, and the scanner 12 scans the position of the workpiece after correction. The workpiece bending data after correction is compared with the preset parameters. If the workpiece bending meets the standard, the correction is completed. The workpiece bending fine-tuning position, the downward pressure of the pressure plate 8, the angle of the pressure plate 8 and the height of the support plate 5 are recorded and uploaded to the bending control system of the worktable 2 to adjust the parameters of the first bending of the workpiece, so as to avoid the same bending deviation in the subsequent workpiece processing. If the workpiece bending data after correction still has a deviation from the preset parameters, the operation is repeated to perform a second fine-tuning of the workpiece.

[0040] Example 2: Please refer to Figure 1 , Figure 3 and Figure 4 A high-precision all-electric servo direct-drive CNC bending machine is disclosed. The outer walls of the pressure plate 8 are equipped with fixing units on both the left and right sides. Each fixing unit consists of a pressure plate 14, a gasket 15, an infrared sensor 16, and a motor 17. Pressure plate 14 is installed on both the left and right sides of the outer walls of the pressure plate 8. A gasket 15 is installed on the lower side of the outer wall of pressure plate 14. The gasket 15 is made of non-metallic soft material. Infrared sensors 16 are installed on both the front and rear sides of the outer wall of gasket 15. Motor 17 is installed on the rear side of the outer wall of motor 9. Pressure plate 14 is connected to motor 17 via a drive shaft. Infrared sensors 16 and motor 17 are connected to controller 13 via signal lines.

[0041] The upper side of the outer wall of the worktable 2 is provided with a T-slot, and a lower mold 18 is installed in the T-slot. A guide rail 19 is installed on the front side of the outer wall of the lower mold 18. A slider 20 is installed on the upper side of the outer wall of the guide rail 19. A baffle 21 is installed on the rear side of the outer wall of the slider 20. A pressure sensor 22 is embedded in the side of the outer wall of the baffle 21 near the lower mold 18. A clamping block 23 is installed on the side of the outer wall of the slider 20 near the slide table 3. A motor 24 is installed on the lower side of the outer wall of the guide rail 19. The slider 20 and the clamping block 23 are respectively connected to the motor 24 through a transmission shaft. The motor 24 and the pressure sensor 22 are respectively connected to the controller 13 through a signal line.

[0042] Furthermore, the worker places the workpiece above the lower mold 18 on the workbench 2. The controller 13 controls the motor 24 to drive the slider 20 along the guide rail 19 towards the workpiece via a ball screw. The slider 20 moves the baffle 21 and clamping block 23 closer to the workpiece. The baffle 21 fits against the edge of the workpiece, and the clamping block 23 clamps the workpiece. The pressure sensor 22 on the baffle 21 detects the contact pressure between the workpiece and the baffle 21 in real time. When the pressure reaches a set threshold, the controller 13 controls the motor 24 to stop driving. After the workpiece is fixed, the controller 13 controls the upper mold 32 to bend the workpiece. After the workpiece is bent, the scanner 12 scans the workpiece. If the workpiece needs to be fine-tuned, the controller 13 controls the motor 17 to drive the pressure plate 2 via the transmission shaft. 14 rotates downwards, and the non-metallic soft pad 15 at the bottom of the pressure plate 14 fits against the surface of the workpiece. While clamping and fixing the workpiece, it avoids damage to the workpiece surface. The infrared sensor 16 detects the edge position and fitting status of the workpiece. After confirming that the workpiece has no offset or warping, the control motor 17 locks the output, keeping the pressure plate 14 in a clamped state. Then, the workpiece is fine-tuned. During the fine-tuning process, the baffle 21 and clamping block 23 keep the overall positioning of the workpiece, and the pressure plate 14 clamps the workpiece to correct the local position, ensuring that the workpiece will not shift or deform during the fine-tuning process. After the fine-tuning is completed, the controller 13 controls the motor 24 to drive the slider 20 to reset the baffle 21 and clamping block 23, and the motor 17 to drive the pressure plate 14 to reset, releasing the clamping of the workpiece.

[0043] Example 3: Please refer to Figure 1 , Figure 4 and Figure 5 A high-precision all-electric servo direct-drive CNC bending machine includes a frame 1 and a worktable 2. The worktable 2 is mounted on the front side of the outer wall of the frame 1, and a slide 3 is mounted on the front side of the outer wall of the worktable 2. A sliding groove 4 is installed at the connection between the slide 3 and the worktable 2. A support plate 5 is mounted on the upper side of the outer wall of the slide 3, and a support rod 6 is mounted on the lower side of the outer wall of the support plate 5. The support rod 6 is connected to a motor 7 mounted on the lower side of the inner wall of the slide 3 via a ball screw. A [missing information - likely a concave or convex structure] is mounted on the upper side of the outer wall of the support plate 5. Pressure plate 8 is connected to motor 9, which is mounted on the upper side of the outer wall of slide table 3, via a ball screw. Harmonic reducer 10 is mounted on the upper side of the outer wall of pressure plate 8. Harmonic reducer 10 is connected to motor 11, which is mounted on the right side of the outer wall of slide table 3, via a transmission shaft. Scanners 12 are mounted on both the left and right sides of the outer wall of pressure plate 8. Motor 7, motor 9, motor 11 and scanner 12 are respectively connected to controller 13, which is mounted on the left side of the outer wall of worktable 2, via signal lines.

[0044] A guide rail 25 is installed in the middle of the inner wall of the worktable 2. A movable stage 26 is installed on the upper side of the outer wall of the guide rail 25. The movable stage 26 is rigidly connected to the slide table 3 through a fixed shaft 27. A push rod 28 is installed on the upper side of the outer wall of the movable stage 26. The push rod 28 is connected to a motor 29 installed in the middle of the inner wall of the movable stage 26 through a ball screw. A grating ruler 30 is installed on the inner wall of the worktable 2 near the movable stage 26. A top block 31 is installed on the upper side of the outer wall of the push rod 28. The top block 31 is made of wear-resistant material. The upper surface of the top block 31 is in contact with the lower surface of the lower mold 18. The motor 29 and the grating ruler 30 are respectively connected to the controller 13 through signal lines.

[0045] The upper mold 32 is installed on the upper side of the outer wall of the lower mold 18. The upper side of the inner wall of the upper mold 32 is equipped with a compensation block 33. The compensation block 33 is connected to the motor 7 34 installed on the upper side of the inner wall of the upper mold 32 via a ball screw. The upper side of the inner wall of the lower mold 18 is equipped with a compensation block 35. The left and right sides of the inner wall of the lower mold 18 are equipped with motors 8 36. The compensation block 2 35 is connected to the motor 8 36 via a ball screw. The upper mold 32 is equipped with a slider 2 37 on the upper side of the outer wall of the upper mold 32. The upper mold 32 and the slider 2 37 are mechanically locked by a clamping plate 38. The grating ruler 2 39 is installed on the side of the outer wall of the frame 1 near the slider 2 37. The slider 2 37 is connected to the motor 9 40 installed on the upper side of the outer wall of the frame 1 via a ball screw. The motors 7 34, 8 36, grating ruler 2 39 and 9 40 are respectively connected to the controller 13 via signal lines.

[0046] Furthermore, the worker places the workpiece on the workbench 2 and fixes it to the upper surface of the lower mold 18. The controller 13 controls the motor 29 to drive the ejector rod 28 through the ball screw, so that the ejector block 31 is tightly fitted with the lower surface of the lower mold 18. Then, the controller 13 controls the motor 40 to drive the slider 37 through the ball screw, which in turn drives the upper mold 32 to press down, applying a bending force to the workpiece. Under the action of the upper mold 32, the workpiece begins to bend. At the same time, under the action of the bending force, the lower mold 18 and the workbench 2 undergo downward deflection deformation. At this time, the pressure between the lower mold 18 and the ejector block 31... As changes occur, the push rod 28 moves downwards accordingly. The grating ruler 30 collects the downward displacement data of the push rod 28 in real time. The controller 13 calculates the required compensation ejection amount based on the workpiece material, plate thickness, bending force, and deformation displacement data collected by the grating ruler 30. If the workpiece is long or has multiple local deflection differences, the controller 13 controls the motor 43 to move the slide table 3 along the sliding groove 4. The scanner 12 detects the workpiece in preparation for fine-tuning. While the slide table 3 moves, the fixed shaft 27 connecting the moving table 26 and the slide table 3 drives the moving table 26 along the guide. Track 25 moves synchronously, and the moving table 26 drives the ejector rod 28 and ejector block 31 to move with the slide table 3. The controller 13 controls the motor 6 29 to drive the ejector rod 28 upward through the ball screw. Combined with the calculated compensation ejection amount, the lower mold 18 is lifted to counteract the downward deflection deformation of the lower mold 18 and the worktable 2 during the workpiece bending process, so that the lower mold 18 is always in a horizontal state. This avoids bending angle deviation and dimensional deviation of the workpiece due to the deformation of the lower mold 18. If the bending force applied to the workpiece changes due to the bending position and the workpiece, the controller 13 controls the motor 6 29 to drive the ejector rod 28 upward. The ejection amount of rod 28 is adjusted. During the fine-tuning of the workpiece bending, the moving table 26 moves synchronously with the slide table 3 to the fine-tuning position. When fine-tuning the workpiece, the ejection amount of rod 28 is increased according to the calculated fine-tuning parameters, so that the ejector block 31 provides greater support to the lower mold 18. This ensures that when bending a new workpiece, the lower mold 18 and the upper mold 32 will not experience any deflection deformation during the bending process. After the processing is completed, the controller 13 controls the motor 6 29 to reset rod 28 and ejector block 31, so that ejector block 31 fits against the lower mold 18, ready for subsequent processing.

[0047] Example 4: Please refer to Figure 1 , Figure 4 , Figure 6 , Figure 7 and Figure 8A high-precision all-electric servo direct-drive CNC bending machine is described. A guide rail 25 is installed in the middle of the inner wall of the worktable 2. A movable stage 26 is installed on the upper side of the outer wall of the guide rail 25. The movable stage 26 is rigidly connected to the slide table 3 via a fixed shaft 27. A push rod 28 is installed on the upper side of the outer wall of the movable stage 26. The push rod 28 is connected to a motor 29 installed in the middle of the inner wall of the movable stage 26 via a ball screw. A grating ruler 30 is installed on the inner wall of the worktable 2 near the movable stage 26. A top block 31 is installed on the upper side of the outer wall of the push rod 28. The top block 31 is made of wear-resistant material, and its upper surface is in contact with the lower surface of the lower mold 18. The motor 29 and the grating ruler 30 are respectively connected to the controller 13 via signal lines.

[0048] The upper mold 32 is installed on the upper side of the outer wall of the lower mold 18. The upper side of the inner wall of the upper mold 32 is equipped with a compensation block 33. The compensation block 33 is connected to the motor 7 34 installed on the upper side of the inner wall of the upper mold 32 via a ball screw. The upper side of the inner wall of the lower mold 18 is equipped with a compensation block 35. The left and right sides of the inner wall of the lower mold 18 are equipped with motors 8 36. The compensation block 2 35 is connected to the motor 8 36 via a ball screw. The upper mold 32 is equipped with a slider 2 37 on the upper side of the outer wall of the upper mold 32. The upper mold 32 and the slider 2 37 are mechanically locked by a clamping plate 38. The grating ruler 2 39 is installed on the side of the outer wall of the frame 1 near the slider 2 37. The slider 2 37 is connected to the motor 9 40 installed on the upper side of the outer wall of the frame 1 via a ball screw. The motors 7 34, 8 36, grating ruler 2 39 and 9 40 are respectively connected to the controller 13 via signal lines.

[0049] Both the lower mold 18 and the upper mold 32 are segmented designs;

[0050] The compensation block 1 33 has a wedge-shaped structure, and the compensation block 2 35 has a left-right symmetrical wedge structure;

[0051] Furthermore, the operator inputs the parameters of the workpiece to be processed into the controller 13, including the workpiece material, thickness, target bending angle, and springback coefficient. The controller 13 acquires the processing correction data and current parameters of the workpiece, calculates the target position of slider 2 37, the target feed amount of compensation block 1 33 in each segment of the upper mold 32, and the target feed amount of compensation block 2 35 in each segment of the lower mold 18. The controller 13 issues commands to the motor 7 34 corresponding to each segment of the upper mold 32. The motor 7 34 drives the compensation block 1 33 horizontally via a ball screw. Utilizing the inclined plane transmission characteristics of the wedge structure, the horizontal displacement is converted into a micro-displacement in the vertical direction to adjust the opening height of the upper mold 32. At the same time, the controller 13 issues commands to the motor 8 36 on the left and right sides of each segment of the lower mold 18. The motor 8 36 drives the compensation block 2 35 horizontally via a ball screw. Through the opening and closing of the inclined plane of the symmetrical wedge structure, the lower mold 18... The opening angle is precisely adjusted. After adjustment, the workpiece is fixed. The controller 13 controls the motor 40 to drive the slider 37 through the ball screw to drive the upper mold 32 to bend the workpiece. The displacement data of the slider 37 is collected by the grating ruler 39 and fed back to the controller 13. After the workpiece is bent, the controller 13 controls the motor 40 to drive the slider 37 to reset the upper mold 32. During the movement of the slide table 3, the scanner 12 collects the bending parameters of the workpiece. If local fine-tuning of the workpiece bending is required, the controller 13 adjusts the feed amount of the compensation block 33 in each segment of the upper mold 32 by driving the compensation block 33 through the motor 34 for the workpiece springback error position. For the angle deviation position, the compensation block 35 in each segment of the lower mold 18 is adjusted by driving the compensation block 35 through the motor 36, thereby avoiding the occurrence of the same bending abnormality in subsequent processing.

[0052] Example 5: Please refer to Figure 1 , Figure 4 and Figure 5 A high-precision all-electric servo direct-drive CNC bending machine is provided. The upper side of the outer wall of the worktable 2 is provided with a T-slot. A lower mold 18 is installed in the T-slot. A guide rail 19 is installed on the front side of the outer wall of the lower mold 18. A slider 20 is installed on the upper side of the outer wall of the guide rail 19. A baffle 21 is installed on the rear side of the outer wall of the slider 20. A pressure sensor 22 is embedded on the outer wall of the baffle 21 near the lower mold 18. A clamping block 23 is installed on the outer wall of the slider 20 near the slide table 3. A motor 24 is installed on the lower side of the outer wall of the guide rail 19. The slider 20 and the clamping block 23 are respectively connected to the motor 24 through a transmission shaft. The motor 24 and the pressure sensor 22 are respectively connected to the controller 13 through a signal line.

[0053] The upper mold 32 is installed on the upper side of the outer wall of the lower mold 18. The upper side of the inner wall of the upper mold 32 is equipped with a compensation block 33. The compensation block 33 is connected to the motor 7 34 installed on the upper side of the inner wall of the upper mold 32 via a ball screw. The upper side of the inner wall of the lower mold 18 is equipped with a compensation block 35. The left and right sides of the inner wall of the lower mold 18 are equipped with motors 8 36. The compensation block 2 35 is connected to the motor 8 36 via a ball screw. The upper mold 32 is equipped with a slider 2 37 on the upper side of the outer wall of the upper mold 32. The upper mold 32 and the slider 2 37 are mechanically locked by a clamping plate 38. The grating ruler 2 39 is installed on the side of the outer wall of the frame 1 near the slider 2 37. The slider 2 37 is connected to the motor 9 40 installed on the upper side of the outer wall of the frame 1 via a ball screw. The motors 7 34, 8 36, grating ruler 2 39 and 9 40 are respectively connected to the controller 13 via signal lines.

[0054] A motor 43 is installed on the front side of the inner wall of the worktable 2. A slider 44 is installed on the inner wall of the sliding groove 4. The slider 44 is rigidly connected to the slide table 3 through a fixed shaft 27. The slider 44 is connected to the motor 43 through a ball screw. Limit blocks 45 are installed on both the left and right sides of the outer wall of the sliding groove 4. A grating ruler 46 is installed on the outer wall of the worktable 2 near the slide table 3. The motor 43 and the grating ruler 46 are respectively connected to the controller 13 through signal lines.

[0055] Furthermore, when the upper mold 32 needs to be replaced, the operator issues a command through the controller 13. The controller 13 controls the motor 40 to move the slider 37 upward, raising the upper mold 32 to a safe height for replacement. The controller 13 then controls the motor 43 to drive the slider 44 via the ball screw, moving the slide table 3 away from the upper mold 32 to be replaced. Subsequently, the clamping plate 38 is unlocked, releasing the mechanical lock on the upper mold 32. The operator removes the upper mold 32 and then uses the motor 24 to drive the slider 20 to reset the baffle 21 and clamping block 23 along the guide rail 19, releasing the baffle 21 and clamping block 23 from their locking mechanism on the lower mold 18. After the new lower mold 18 is placed in the fixed position, the baffle 1 21 and clamping block 23 are restored to their fixed position on the lower mold 18. After the lower mold 18 is replaced, the worker places the upper mold 32 to be replaced in the corresponding position of the lower mold 18. Then, the controller 13 controls the motor 9 40 to drive the slider 2 37 to move down. By adjusting the tightness of the baffle 1 21 and clamping block 23 on the lower mold 18, the upper mold 32 and the lower mold 18 are aligned. Then, the clamping plate 38 is used to lock the upper mold 32, thus completing the replacement of the upper mold 32. This avoids the situation where the upper mold 32 and the lower mold 18 are not aligned during the replacement process.

[0056] Working principle: The operator inputs the parameters of the workpiece to be processed into the controller 13, including the workpiece material, thickness, target bending angle and springback coefficient, etc. The controller 13 obtains the processing correction data of the workpiece and calculates the target position of the slider 2 37, the target feed amount of the compensation block 1 33 in each segment upper mold 32 and the target feed amount of the compensation block 2 35 in each segment lower mold 18. The controller 13 issues instructions to the motor 7 34 corresponding to each segment upper mold 32. The motor 7 34 drives the compensation block 1 33 to feed horizontally through the ball screw to adjust the opening height of the upper mold 32. At the same time, the controller 13 issues instructions to the motor 8 36 on the left and right sides of each segment lower mold 18. The motor 8 36 drives the compensation block 2 35 to feed horizontally through the ball screw to precisely adjust the opening angle of the lower mold 18.

[0057] After adjustment, the worker places the workpiece on the workbench 2. The controller 13 controls the motor 6 29 to drive the ejector rod 28 through the ball screw, so that the ejector block 31 is in close contact with the lower surface of the lower mold 18. Then, the controller 13 controls the motor 9 40 to drive the slider 2 37 through the ball screw to push the upper mold 32 down. During the pressing of the upper mold 32, the workpiece bends and the lower mold 18 and the workbench 2 undergo downward deflection deformation. The deflection deformation of the lower mold 18 causes the ejector block 31 and the ejector rod 28 to move. The displacement data of the ejector rod 28 is collected in real time by the grating ruler 1 30. The controller 13 calculates the required compensation ejection amount based on the workpiece parameters and the displacement data collected by the grating ruler 1 30. In the subsequent workpiece processing, the ejector rod 28 is pushed upward by the motor 6 29 to counteract the downward deflection deformation of the lower mold 18 and the workbench 2 during the workpiece bending process.

[0058] The controller 13 controls the motor 10 43 to drive the slider 3 44 to move along the sliding groove 4 via the ball screw. The slider 3 44 drives the slide table 3 to move left and right along the worktable 2 via the fixed shaft 27 connecting the slide table 3 and the slider 3 44. During the movement of the slide table 3, the grating ruler 5 46 collects the movement information of the slide table 3, thereby obtaining the position information of the slide table 3 and transmitting it to the controller 13. During the movement of the slide table 3, the scanner 12 scans the workpiece to obtain the actual bending parameters of the workpiece. The controller 13 compares the actual bending parameters of the workpiece with the preset bending parameters. If there is a deviation between the bending information at a certain position and the preset parameters, the controller 13 drives the slider 3 44 via the motor 10 43 to move the slide table 3 to the position with the deviation and make fine adjustments to the workpiece. The controller 13 controls the motor 4 17 to drive the pressure plate 2 14 to rotate downward via the transmission shaft. The non-metallic soft pad 15 at the bottom of the pressure plate 2 14 is attached to the surface of the workpiece for auxiliary fixation.

[0059] Based on the deviation between the actual bending parameters of the workpiece and the preset bending parameters, controller 13 calculates the target height of support plate 5, the target swing angle of pressure plate 8, and the target downward pressure of pressure plate 8. Controller 13 controls motor 7 to drive support rod 6 vertically up and down via ball screw, moving support plate 5 to the target height. Controller 13 then controls motor 11 to drive harmonic reducer 10 via transmission shaft. Under the drive of harmonic reducer 10, the angle of pressure plate 8 is adjusted to the target angle matching the bending angle of the workpiece's fine-tuning area. Subsequently, controller 13 controls motor 9 to drive pressure plate 8 via ball screw. 8. The pressure plate 8 moves down and fine-tunes the bending deviation area of ​​the workpiece. After the correction is completed, the controller 13 controls the motor 9 to drive the pressure plate 8 to reset. The scanner 12 scans the position of the workpiece after correction and compares the corrected workpiece bending data with the preset parameters. If the workpiece bending meets the standard, the correction is completed. The workpiece bending fine-tuning position, the downward pressure of the pressure plate 8, the angle of the pressure plate 8 and the height of the support plate 5 are recorded and uploaded. The parameters of the first bending of the workpiece are adjusted. If there is still a deviation between the corrected workpiece bending data and the preset parameters, the operation is repeated to perform a second fine-tuning of the workpiece.

[0060] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-precision all-electric servo direct-drive CNC bending machine, characterized in that: Includes a frame (1) and a worktable (2). The worktable (2) is installed on the front side of the outer wall of the frame (1). A slide (3) is installed on the front side of the outer wall of the worktable (2). A sliding groove (4) is installed at the connection between the slide (3) and the worktable (2). A support plate (5) is installed on the upper side of the outer wall of the slide (3). A support rod (6) is installed on the lower side of the outer wall of the support plate (5). The support rod (6) is connected to a motor (7) installed on the lower side of the inner wall of the slide (3) via a ball screw. A pressure plate (8) is installed on the upper side of the outer wall of the support plate (5). The pressure plate (8) is connected to the motor (9) installed on the upper side of the outer wall of the slide (3) via a ball screw. A harmonic reducer (10) is installed on the upper side of the outer wall of the pressure plate (8). The harmonic reducer (10) is connected to the motor (11) installed on the right side of the outer wall of the slide (3) via a transmission shaft. Scanners (12) are installed on both the left and right sides of the outer wall of the pressure plate (8). The motor (7), motor (9), motor (11) and scanner (12) are connected to the controller (13) installed on the left side of the outer wall of the worktable (2) via signal lines.

2. The high-precision all-electric servo direct-drive CNC bending machine according to claim 1, characterized in that: The pressure plate 1 (8) is equipped with a fixing unit on both the left and right sides of its outer wall. The fixing unit consists of a pressure plate 2 (14), a gasket (15), an infrared sensor (16), and a motor 4 (17). The pressure plate 2 (14) is installed on both the left and right sides of the outer wall of the pressure plate 1 (8). A gasket (15) is installed on the lower side of the outer wall of the pressure plate 2 (14). The gasket (15) is made of non-metallic soft material. Infrared sensors (16) are installed on both the front and rear sides of the outer wall of the gasket (15). Motor 4 (17) is installed on the rear side of the outer wall of motor 2 (9). The pressure plate 2 (14) is connected to motor 4 (17) through a transmission shaft. The infrared sensor (16) and motor 4 (17) are connected to the controller (13) through signal lines respectively.

3. A high-precision all-electric servo direct-drive CNC bending machine according to claim 1, characterized in that: The upper side of the outer wall of the workbench (2) is provided with a T-slot, and the lower mold (18) is installed in the T-slot. The front side of the outer wall of the lower mold (18) is provided with a guide rail (19), the upper side of the outer wall of the guide rail (19) is provided with a slider (20), the rear side of the outer wall of the slider (20) is provided with a baffle (21), the side of the outer wall of the baffle (21) near the lower mold (18) is embedded with a pressure sensor (22), the side of the outer wall of the slider (20) near the slide table (3) is provided with a clamping block (23), the lower side of the outer wall of the guide rail (19) is provided with a motor (24), the slider (20) and the clamping block (23) are respectively connected to the motor (24) through a transmission shaft, and the motor (24) and the pressure sensor (22) are respectively connected to the controller (13) through a signal line.

4. A high-precision all-electric servo direct-drive CNC bending machine according to claim 1, characterized in that: The inner wall of the worktable (2) is equipped with a guide rail 2 (25) in the middle. A moving platform (26) is installed on the upper side of the outer wall of the guide rail 2 (25). The moving platform (26) is rigidly connected to the slide table (3) through a fixed shaft (27). A top rod (28) is installed on the upper side of the outer wall of the moving platform (26). The top rod (28) is connected to the motor 6 (29) installed in the middle of the inner wall of the moving platform (26) through a ball screw. A grating ruler 1 (30) is installed on the inner wall of the worktable (2) near the moving platform (26). A top block (31) is installed on the upper side of the outer wall of the top rod (28). The top block (31) is made of wear-resistant material. The upper surface of the top block (31) is in contact with the lower surface of the lower mold (18). The motor 6 (29) and the grating ruler 1 (30) are connected to the controller (13) through signal lines respectively.

5. A high-precision all-electric servo direct-drive CNC bending machine according to claim 3, characterized in that: An upper mold (32) is installed on the upper side of the outer wall of the lower mold (18). A compensation block 1 (33) is installed on the upper side of the inner wall of the upper mold (32). The compensation block 1 (33) is connected to a motor 7 (34) installed on the upper side of the inner wall of the upper mold (32) via a ball screw. A compensation block 2 (35) is installed on the upper side of the inner wall of the lower mold (18). Motors 8 (36) are installed on both the left and right sides of the inner wall of the lower mold (18). The compensation block 2 (35) is connected to motors 8 (36) via ball screws. The upper mold (32) A slider two (37) is installed on the upper side of the outer wall. The upper mold (32) and slider two (37) are mechanically locked by clamp (38). A grating ruler two (39) is installed on the outer wall of the frame (1) near slider two (37). Slider two (37) is connected to motor nine (40) installed on the upper side of the outer wall of the frame (1) through a ball screw. Motor seven (34), motor eight (36), grating ruler two (39) and motor nine (40) are connected to the controller (13) through signal lines respectively.

6. A high-precision all-electric servo direct-drive CNC bending machine according to claim 1, characterized in that: A grating ruler three (41) is installed on the front side of the inner wall of the slide (3). The grating ruler three (41) is parallel to the support rod (6). A grating ruler four (42) is installed on the outer wall of the slide (3) near the pressure plate one (8). The grating ruler four (42) is parallel to the ball screw connecting the pressure plate one (8) and the motor two (9). The grating ruler three (41) and the grating ruler four (42) are respectively connected to the controller (13) through signal lines.

7. A high-precision all-electric servo direct-drive CNC bending machine according to claim 1, characterized in that: The workbench (2) is equipped with a motor (43) on the front side of its inner wall, and a slider (44) is installed on the inner wall of the sliding groove (4). The slider (44) is rigidly connected to the slide table (3) through a fixed shaft (27). The slider (44) is connected to the motor (43) through a ball screw. Limit blocks (45) are installed on both the left and right sides of the outer wall of the sliding groove (4). A grating ruler (46) is installed on the outer wall of the workbench (2) near the slide table (3). The motor (43) and the grating ruler (46) are connected to the controller (13) through signal lines.

8. A high-precision all-electric servo direct-drive CNC bending machine according to claim 1, characterized in that: The ball screw connecting the support rod (6) to motor one (7) and the ball screw connecting the pressure plate one (8) to motor two (9) are coaxial.

9. A high-precision all-electric servo direct-drive CNC bending machine according to claim 5, characterized in that: Both the lower mold (18) and the upper mold (32) are segmented designs.

10. A high-precision all-electric servo direct-drive CNC bending machine according to claim 5, characterized in that: The first compensation block (33) is a wedge-shaped structure, and the second compensation block (35) is a left-right symmetrical wedge-shaped structure.

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