Real-time compensation device for positioning error of numerical control machine tool
The device, driven by a hydraulic press and a motor, enables the height adjustment and clamping of the probe, solving the problem that existing technologies can only compensate for workpieces of fixed height, and improving the machining accuracy and stability of CNC machine tools.
Patent Information
- Application Number
- CN202520118731.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-19
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-01-19
AI Technical Summary
Existing real-time positioning error compensation devices for CNC machine tools can only compensate for workpieces with a fixed height, which leads to frequent replacement or adjustment when the workpiece height changes, reducing work efficiency and increasing operation difficulty and error.
A device comprising a hydraulic press, a limiting plate, a sliding plate, a lifting plate, and a motor drive is designed. The hydraulic press drives the limiting plate and the sliding plate, and the motor drives the worm gear system to achieve height adjustment and clamping fixation of the probe, ensuring that the probe maintains an appropriate distance from the machine tool processing surface and compensating for positioning errors in real time.
It enables real-time height adjustment and secure clamping of the probe, reducing positioning errors caused by height changes, improving processing accuracy and stability, and preventing the probe from moving or shifting due to vibration or external force during processing.
Smart Images
Figure CN223700231U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of precision mechanical design and manufacturing technology, and in particular to a real-time compensation device for positioning error of CNC machine tools. Background Technology
[0002] During the machining process of CNC machine tools, positioning errors occur due to the manufacturing precision of the machine tool itself, errors in the transmission system, the precision of the sensing elements, and environmental factors (such as temperature, humidity, and cutting force). These errors cause deviations in the machining process, thus affecting the machining accuracy and quality of the workpiece. A real-time compensation device can monitor the machine tool's status and errors in real time and compensate for them, thereby significantly improving the machining accuracy. Therefore, a real-time positioning error compensation device for CNC machine tools is needed.
[0003] A real-time positioning error compensation device for CNC machine tools is a device used to improve the machining accuracy of CNC machine tools. Previous real-time positioning error compensation devices for CNC machine tools could only compensate for positioning errors of workpieces with a fixed height. In actual machining, the height of the workpiece often varies, requiring frequent changes or adjustments to the height of the machine tool and the workpiece. This not only reduces work efficiency but may also increase operational difficulty and errors. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a real-time positioning error compensation device for CNC machine tools, which aims to improve the problem that positioning error compensation can only be performed on workpieces with a fixed height.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a real-time positioning error compensation device for CNC machine tools, comprising a fixed block, a hydraulic press fixedly connected inside the fixed block, a limit plate fixedly connected to the output end of the hydraulic press, a first sliding plate fixedly connected to the lower surface of the limit plate, a first slide rail slidably connected to the lower surface of the first sliding plate, a limit rod slidably connected inside the limit plate, a limit groove formed inside the limit plate, the outer wall of the limit rod slidably connected to the inner wall of the limit groove, a second sliding plate fixedly connected to the outer wall of the limit rod, a lifting plate fixedly connected to the outer wall of the second sliding plate, a second slide rail slidably connected to the outer wall of the second sliding plate, and a support assembly provided on the outer wall of the second slide rail for auxiliary support.
[0006] Preferably, the support assembly includes a support plate, the outer wall of the support plate is fixedly connected to the outer wall of the second slide rail, a sensing platform is fixedly connected to the lower surface of the support plate, and the fixing block and the lower surface of the first slide rail are fixedly connected to the upper surface of the sensing platform.
[0007] Preferably, a first U-shaped block is fixedly connected to the outer wall of the lifting plate, and a second U-shaped block is fixedly connected to the outer wall of the first U-shaped block.
[0008] Preferably, a motor is fixedly connected inside the second U-shaped block, and a worm is fixedly provided at the output end of the motor, with a worm wheel meshing with the tooth end of the worm.
[0009] Preferably, the worm gear is internally rotatably connected to a fixed shaft, and both ends of the fixed shaft are fixedly connected to the inside of the second U-shaped block.
[0010] Preferably, a movable block is fixedly connected inside the worm gear, and a third U-shaped block is rotatably connected to the outer wall of the movable block.
[0011] Preferably, a clamping block is fixedly connected to the outer wall of the third U-shaped block, and a connecting piece is rotatably connected to the inside of the third U-shaped block.
[0012] Preferably, the connecting piece is rotatably connected to a connecting shaft, and both ends of the connecting shaft are fixedly connected to the inside of the second U-shaped block.
[0013] This utility model has the following beneficial effects:
[0014] 1. In this utility model, a hydraulic press drives a limiting plate, which in turn drives a first sliding plate. A limiting groove drives a limiting rod, which in turn drives a second sliding plate. The second sliding plate then drives a lifting plate to move up and down, thereby achieving real-time adjustment of the probe's height and ensuring that the probe always maintains an appropriate distance from the machine tool's processing surface.
[0015] 2. In this utility model, the motor drives the worm gear, which in turn drives the worm wheel. The worm wheel drives the moving block to move, which in turn drives the third U-shaped block to move. The third U-shaped block drives the clamping block to clamp and fix the probe. Thus, the probe can automatically compensate for errors, thereby firmly fixing the probe and preventing it from moving or shifting due to vibration or external force during processing. Attached Figure Description
[0016] Figure 1 This is a perspective view of a real-time positioning error compensation device for CNC machine tools proposed in this utility model;
[0017] Figure 2 This is a partial structural diagram of the lifting plate of a real-time positioning error compensation device for CNC machine tools proposed in this utility model;
[0018] Figure 3 This is a partial structural diagram of the fixed axis of a real-time positioning error compensation device for CNC machine tools proposed in this utility model.
[0019] Legend:
[0020] 1. Fixed block; 2. Hydraulic press; 3. Limiting plate; 4. First sliding plate; 5. First slide rail; 6. Limiting rod; 7. Limiting groove; 8. Second sliding plate; 9. Lifting plate; 10. Second slide rail; 11. Support plate; 12. Sensing table; 13. First U-shaped block; 14. Second U-shaped block; 15. Motor; 16. Worm gear; 17. Worm wheel; 18. Fixed shaft; 19. Moving block; 20. Third U-shaped block; 21. Clamping block; 22. Connecting piece; 23. Connecting shaft. Detailed Implementation
[0021] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0022] Reference Figure 1 and Figure 2 This utility model provides an embodiment of a real-time positioning error compensation device for a CNC machine tool, comprising a fixed block 1, a hydraulic press 2 fixedly connected inside the fixed block 1, a limit plate 3 fixedly connected to the output end of the hydraulic press 2, a first sliding plate 4 fixedly connected to the lower surface of the limit plate 3, a first slide rail 5 slidably connected to the lower surface of the first sliding plate 4, a limit rod 6 slidably connected inside the limit plate 3, a limit groove 7 formed inside the limit plate 3, the outer wall of the limit rod 6 slidably connected to the inner wall of the limit groove 7, a second sliding plate 8 fixedly connected to the outer wall of the limit rod 6, a lifting plate 9 fixedly connected to the outer wall of the second sliding plate 8, a second slide rail 10 slidably connected to the outer wall of the second sliding plate 8, and a support assembly provided on the outer wall of the second slide rail 10 for auxiliary support.
[0023] Specifically, the fixing block 1 provides fixed support for the hydraulic press 2. The hydraulic press 2 drives the limiting plate 3, which in turn drives the first sliding plate 4 to slide on the upper surface of the first slide rail 5. The limiting groove 7 inside the limiting plate 3 drives the limiting rod 6 to move. The limiting groove 7 inside the limiting plate 3 limits the limiting rod 6. The limiting rod 6 drives the second sliding plate 8 to slide on the outer wall of the second slide rail 10. At the same time, the second sliding plate 8 drives the lifting plate 9 to rise and fall.
[0024] Reference Figure 1 The support assembly includes a support plate 11, the outer wall of which is fixedly connected to the outer wall of the second slide rail 10, and a sensing platform 12 is fixedly connected to the lower surface of the support plate 11. The lower surfaces of the fixing block 1 and the first slide rail 5 are fixedly connected to the upper surface of the sensing platform 12.
[0025] Specifically, the sensing table 12 provides fixed support for the fixed block 1 and the first slide rail 5, the support plate 11 provides fixed support for the second slide rail 10, the sensing table 12 provides fixed support for the support plate 11, and the sensing table 12 senses the error of the workpiece.
[0026] Reference Figure 1 - Figure 3 A first U-shaped block 13 is fixedly connected to the outer wall of the lifting plate 9. A second U-shaped block 14 is fixedly connected to the outer wall of the first U-shaped block 13. A motor 15 is fixedly connected inside the second U-shaped block 14. A worm gear 16 is fixedly installed at the output end of the motor 15. A worm wheel 17 is meshed with the tooth end of the worm gear 16. A fixed shaft 18 is rotatably connected inside the worm wheel 17. Both ends of the fixed shaft 18 are fixedly connected inside the second U-shaped block 14. A moving block 19 is fixedly connected inside the worm wheel 17. A third U-shaped block 20 is rotatably connected to the outer wall of the moving block 19. A clamping block 21 is fixedly connected to the outer wall of the third U-shaped block 20. A connecting piece 22 is rotatably connected inside the third U-shaped block 20. A connecting shaft 23 is rotatably connected inside the connecting piece 22. Both ends of the connecting shaft 23 are fixedly connected inside the second U-shaped block 14.
[0027] Specifically, the lifting plate 9 provides fixed support for the first U-shaped block 13, and the second U-shaped block 14 provides fixed support for the motor 15. The motor 15 drives the worm gear 16, which in turn drives the worm wheel 17 to rotate on the outer wall of the fixed shaft 18. The worm wheel 17 drives the moving block 19 to move, which in turn drives the third U-shaped block 20 to move. The movement of the third U-shaped block 20 drives the clamping block 21 to clamp and fix the probe, thereby enabling automatic error compensation by the probe. At the same time, the third U-shaped block 20 drives the connecting piece 22 to rotate on the outer wall of the connecting shaft 23, thereby providing auxiliary clamping and limiting functions.
[0028] Working principle: When the device is needed, the motor 15 inside the second U-shaped block 14 is started. The motor 15 drives the worm gear 16, which in turn drives the worm wheel 17 to rotate on the outer wall of the fixed shaft 18. The worm wheel 17 drives the moving block 19 to move, which in turn drives the third U-shaped block 20 to move. As the third U-shaped block 20 moves, it drives the clamping block 21 to clamp and fix the probe, thereby enabling automatic error compensation of the probe. At the same time, the third U-shaped block 20 drives the connecting piece 22 to rotate on the outer wall of the connecting shaft 23, thereby achieving the effect of auxiliary clamping and limiting. The hydraulic press 2 inside the fixed block 1 is started. The hydraulic press 2 drives the limiting plate 3, which in turn drives the first sliding plate 4 to slide on the first sliding plate. On the upper surface of rail 5, the limiting groove 7 inside the limiting plate 3 drives the limiting rod 6 to move, thereby assisting in the limiting. The limiting rod 6 drives the second sliding plate 8 to slide on the outer wall of the second slide rail 10. At the same time, the second sliding plate 8 drives the lifting plate 9 to rise and fall. This device not only adjusts the height of the probe in real time to ensure that the probe always maintains an appropriate distance from the machine tool's machining surface, but also helps to reduce positioning errors caused by height changes and improve the compensation effect. It can also firmly fix the probe to prevent it from moving or shifting due to vibration or external force during processing, thus helping to ensure that the probe always acts accurately on the machine tool's machining surface, thereby improving the stability and accuracy of positioning.
[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A real-time positioning error compensation device for CNC machine tools, comprising a fixed block (1), characterized in that: A hydraulic press (2) is fixedly connected inside the fixed block (1). A limiting plate (3) is fixedly connected to the output end of the hydraulic press (2). A first sliding plate (4) is fixedly connected to the lower surface of the limiting plate (3). A first slide rail (5) is slidably connected to the lower surface of the first sliding plate (4). A limiting rod (6) is slidably connected inside the limiting plate (3). A limiting groove (7) is opened inside the limiting plate (3). The outer wall of the limiting rod (6) is slidably connected to the inner wall of the limiting groove (7). A second sliding plate (8) is fixedly connected to the outer wall of the limiting rod (6). A lifting plate (9) is fixedly connected to the outer wall of the second sliding plate (8). A second slide rail (10) is slidably connected to the outer wall of the second sliding plate (8). A support component is provided on the outer wall of the second slide rail (10). The support component is used for auxiliary support.
2. The real-time positioning error compensation device for CNC machine tools according to claim 1, characterized in that: The support assembly includes a support plate (11), the outer wall of which is fixedly connected to the outer wall of the second slide rail (10), and a sensing platform (12) is fixedly connected to the lower surface of the support plate (11). The lower surfaces of the fixing block (1) and the first slide rail (5) are fixedly connected to the upper surface of the sensing platform (12).
3. The real-time positioning error compensation device for CNC machine tools according to claim 1, characterized in that: The outer wall of the lifting plate (9) is fixedly connected to a first U-shaped block (13), and the outer wall of the first U-shaped block (13) is fixedly connected to a second U-shaped block (14).
4. The real-time positioning error compensation device for CNC machine tools according to claim 3, characterized in that: The second U-shaped block (14) is internally connected to a motor (15), and the output end of the motor (15) is fixedly provided with a worm (16), and the tooth end of the worm (16) is meshed with a worm wheel (17).
5. A real-time positioning error compensation device for CNC machine tools according to claim 4, characterized in that: The worm gear (17) is rotatably connected to a fixed shaft (18), and both ends of the fixed shaft (18) are fixedly connected to the inside of the second U-shaped block (14).
6. The real-time positioning error compensation device for CNC machine tools according to claim 5, characterized in that: The worm gear (17) is fixedly connected to a movable block (19), and the outer wall of the movable block (19) is rotatably connected to a third U-shaped block (20).
7. A real-time positioning error compensation device for CNC machine tools according to claim 6, characterized in that: The outer wall of the third U-shaped block (20) is fixedly connected to a clamping block (21), and the interior of the third U-shaped block (20) is rotatably connected to a connecting piece (22).
8. A real-time positioning error compensation device for CNC machine tools according to claim 7, characterized in that: The connecting piece (22) is rotatably connected to a connecting shaft (23), and both ends of the connecting shaft (23) are fixedly connected to the inside of the second U-shaped block (14).