Automatic displacement mechanism of numerical control machine tool
By introducing ball screw drive and electromagnet attraction mechanism into CNC machine tools, the problem of reduced machining accuracy caused by wear of limiting components was solved, achieving high-precision machining and reducing production costs.
Patent Information
- Application Number
- CN202422803902.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-18
AI Technical Summary
During the machining process of existing CNC machine tools, the tool exerts a large force on the workpiece. After long-term use, the limiting components are easily worn, resulting in a decrease in machining accuracy and an increase in production costs.
The ball screw drive mechanism and electromagnet attraction mechanism are adopted. Through the cooperation of the electromagnet and the iron core, the positioning block can be accurately positioned, reducing the wear of the limit components. The positioning block is separated from the slider by the spring, and the debris on the guide rail is cleaned to ensure processing accuracy.
It improves the processing quality and service life of CNC machine tools, reduces the wear of limiting components, reduces production costs, and ensures accuracy during the processing.
Smart Images
Figure CN223353537U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of numerical control machine tools, in particular to an automatic displacement mechanism of a numerical control machine tool. Background Art
[0002] A CNC machine tool is an automated machine tool equipped with a program control system. The system can logically process programs specified by control codes or other symbolic instructions and decode them to enable the machine tool to move and process parts. The processing time of CNC machine tools can be accurately estimated in advance, the tools and fixtures used can be standardized and modernized, and the standardization of processing information can be easily achieved. It has been organically combined with computer-aided design and manufacturing and is the foundation of modern integrated manufacturing technology.
[0003] During operation, existing CNC machine tools experience significant force exerted by the tool on the workpiece. After prolonged use, the lead screw, relying solely on its own limiting function, is susceptible to significant wear, making it difficult to maintain workpiece precision during machining, thereby reducing machining quality. Frequent replacement significantly increases production costs. In light of this, the present application proposes an automatic displacement mechanism for CNC machine tools. Utility Model Content
[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an automatic displacement mechanism for a CNC machine tool.
[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0006] An automatic displacement mechanism for a numerically controlled machine tool comprises an operating table, an assembly slot being defined on the operating table, a drive mechanism being disposed in the assembly slot, the drive mechanism comprising a ball screw, a screw nut being sleeved on the ball screw, a connecting block being fixedly connected to the screw nut, a support plate being fixedly connected to the top of the connecting block, a plurality of connecting rods being equidistantly disposed on the support plate, and a second platform being commonly connected to the tops of the plurality of connecting rods;
[0007] Two guide rails are symmetrically arranged on the top of the operating table, and guide grooves are respectively opened on the two guide rails. Two sliders are slidably connected to the two guide rails. Fixed blocks are respectively provided on the tops of the two sliders. Positioning blocks are commonly provided between the multiple fixed blocks and the corresponding sliders. The corresponding side walls of the multiple positioning blocks are all provided with inclined wedge surfaces. The multiple positioning blocks are respectively connected to suction mechanisms.
[0008] A baffle is commonly provided between the two fixing blocks on the guide rail on the same side.
[0009] As a further preferred embodiment of the present technical solution, a limiting groove and a countersunk hole are respectively provided on the fixing block, a movable rod is provided in the limiting groove, and a spring is installed in the countersunk hole.
[0010] As a further preferred embodiment of the present technical solution, one end of the movable rod is fixedly connected to the side wall of the positioning block, and the other end of the movable rod is connected to the suction mechanism;
[0011] One end of the spring is fixedly connected to the inner wall of the countersunk hole, and the other end of the spring is fixedly connected to the side wall of the positioning block.
[0012] As a further preferred embodiment of the present technical solution, the attraction mechanism includes an electromagnet and an iron core, and the positions of the electromagnet and the iron core correspond to each other. The electromagnet is connected to the side wall of the fixed block through a fixed plate, and the iron core is fixedly installed at the end of the movable rod.
[0013] As a further preferred embodiment of the present technical solution, a servo motor is provided at one end of the ball screw, and the output shaft of the servo motor is connected to the ball screw through a coupling, and a bearing seat is provided at the other end of the ball screw, and the bearing seat is connected to the ball screw through an embedded bearing.
[0014] As a further preferred embodiment of the present technical solution, two brackets are symmetrically provided on the top of the operating table, grooves are respectively provided on the side walls of the two brackets, and both ends of the support plate extend into the corresponding grooves respectively.
[0015] The utility model has the following beneficial effects:
[0016] 1. The utility model provides an electromagnet and an iron core, which will drive the movable rod to move after being energized, so that the positioning block moves below the fixed block, and finally the bottom of the positioning block is against the upper surface of the guide rail, thereby increasing the overall support performance of the operating table, reducing the wear on key limit components, and improving the service life. With the further fixation of the positioning block, the displacement of the workpiece during the processing is avoided, and the processing quality is improved.
[0017] 2. The utility model uses a spring to push the positioning block and the slider to separate. In the process of adjusting the position of the workpiece, the inclined wedge surface provided on the positioning block can clean the guide rail and push down the workpiece debris accumulated on the upper surface of the guide rail, avoiding the workpiece debris being drawn between the slider and the guide rail during movement and scratching the components, thereby avoiding affecting the displacement accuracy of the CNC machine tool. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the main structure of an automatic displacement mechanism for a CNC machine tool proposed in the present invention;
[0019] Figure 2This is a partial structural diagram of an automatic displacement mechanism for a CNC machine tool proposed in the present utility model;
[0020] Figure 3 This is a structural diagram of a driving mechanism of an automatic displacement mechanism of a CNC machine tool proposed in the present invention;
[0021] Figure 4 This is a structural diagram of a slider and a positioning block of an automatic displacement mechanism of a CNC machine tool proposed by the present invention;
[0022] Figure 5 This is a schematic cross-sectional view of a fixed block of an automatic displacement mechanism of a CNC machine tool proposed in the present invention;
[0023] Figure 6 The utility model is a structural schematic diagram of a positioning block and a movable rod of an automatic displacement mechanism of a CNC machine tool.
[0024] In the figure: 1. Operating table; 11. Assembly groove; 12. Bracket; 13. Groove; 2. Driving mechanism; 21. Ball screw; 22. Servo motor; 23. Bearing seat; 24. Screw nut; 25. Connecting block; 26. Support plate; 27. Connecting rod; 3. Guide rail; 31. Guide groove; 4. Slider; 41. Fixed block; 42. Limiting groove; 43. Countersunk hole; 44. Movable rod; 45. Spring; 5. Positioning block; 51. Wedge surface; 6. Suction mechanism; 61. Electromagnet; 62. Iron core; 7. Baffle; 8. Second platform. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0026] The utility model provides a technical solution: Figure 1 and Figure 2 As shown, an automatic displacement mechanism of a CNC machine tool includes an operating table 1, and two brackets 12 are symmetrically arranged on the top of the operating table 1. Grooves 13 are respectively opened on the side walls of the two brackets 12, and the two ends of the support plate 26 extend into the corresponding grooves 13 respectively. Furthermore, the inner wall of the groove 13 plays a certain limiting role on the support plate 26, and in the process of displacement of the CNC machine tool components, it is ensured that the support plate 26 remains stable, thereby improving the stability of the overall components.
[0027] like Figure 2As shown, an assembly groove 11 is provided on the operating table 1, and a driving mechanism 2 is arranged in the assembly groove 11. The driving mechanism 2 includes a ball screw 21, and a servo motor 22 is provided at one end of the ball screw 21, and the output shaft of the servo motor 22 is connected to the ball screw 21 through a coupling, and a bearing seat 23 is provided at the other end of the ball screw 21, and the bearing seat 23 is connected to the ball screw 21 through an embedded bearing. It should be noted that when the position of the workpiece needs to be adjusted, the servo motor 22 is started, and the output shaft of the servo motor 22 will drive the ball screw 21 to rotate synchronously. Under the limit of the guide rail 3 and the slider 4, the screw nut 24 mounted on the ball screw 21 is moved, so that the machine tool is shifted to the corresponding position.
[0028] In addition, a screw nut 24 is sleeved on the ball screw 21, and a connecting block 25 is fixedly connected to the screw nut 24. The top of the connecting block 25 is fixedly connected to a support plate 26. A plurality of connecting rods 27 are equidistantly arranged on the support plate 26, and the tops of the plurality of connecting rods 27 are commonly connected to the second platform 8. It should be noted that when the screw nut 24 moves along the direction set by the ball screw 21, it will drive the second platform 8 to move synchronously, thereby adjusting the X-axis direction of the workpiece. The second platform 8 is provided with the same components as those on the operating table 1 and has the same working principle, so it can adjust the Y-axis direction of the workpiece.
[0029] like Figure 2 and Figure 5 As shown, two guide rails 3 are symmetrically arranged on the top of the operating table 1, and guide grooves 31 are respectively opened on the two guide rails 3. The extension block at the bottom of the slider 4 is embedded in the guide groove 31, which can ensure that the slider 4 is always in contact with the guide groove 31, thereby improving the stability during movement. Two sliders 4 are slidably connected on the two guide rails 3, and fixed blocks 41 are respectively provided on the top of the two sliders 4. Limiting grooves 42 and countersunk holes 43 are respectively opened on the fixed blocks 41. A movable rod 44 is provided in the limiting groove 42, and a spring 45 is installed in the countersunk hole 43. One end of the movable rod 44 is fixedly connected to the side wall of the positioning block 5, and the other end of the movable rod 44 is connected to the suction mechanism 6. One end of the spring 45 is fixedly connected to the inner wall of the countersunk hole 43, and the other end of the spring 45 is fixedly connected to the side wall of the positioning block 5. It should be noted that a rubber pad (such as Figure 5As shown), the movable rod 44 can produce a small displacement by relying on the deformation of the rubber pad itself. Furthermore, the side wall of the fixed block 41 is provided with an inclined surface with the same angle as the inclined wedge surface 51 on the positioning block 5. Therefore, when the movable rod 44 drives the positioning block 5 to abut against the fixed block 41, the positioning block 5 will deviate downward along the angle of the inclined wedge surface 51, so that the bottom of the positioning block 5 abuts against the upper surface of the guide rail 3, further limiting the position of the slider 4, improving the strength of the limit, avoiding serious wear of the limit component due to the large force generated by the tool during the processing, and improving the overall service life of the device.
[0030] like Figure 4 and Figure 6 As shown, a positioning block 5 is commonly provided between the plurality of fixed blocks 41 and the corresponding sliders 4, and the corresponding side walls of the plurality of positioning blocks 5 are provided with an inclined wedge surface 51. The plurality of positioning blocks 5 are respectively connected with an attraction mechanism 6, and the attraction mechanism 6 includes an electromagnet 61 and an iron core 62, and the positions of the electromagnet 61 and the iron core 62 correspond to each other. The electromagnet 61 is connected to the side wall of the fixed block 41 through a fixed plate, and the iron core 62 is fixedly installed at the end of the movable rod 44. Further, after the external power supply supplies power to the electrically connected electromagnet 61, a magnetic field is generated to drive The iron core 62 is against the electromagnet 61, thereby driving the positioning block 5 to move synchronously. When no power is supplied, the spring 45 will push the positioning block 5 to separate from the fixed block 41. At this time, during displacement, the inclined wedge surface 51 on the other side of the positioning block 5 can clean the guide rail 3 to prevent accumulated workpiece debris from being drawn into the space between the guide rail 3 and the slider 4. Furthermore, when encountering tightly attached debris, the bottom of the positioning block 5 is against the debris through the connection of the spring 45, which can change the contact angle with the guide rail 3, thereby facilitating the shoveling of the debris and improving the cleaning effect.
[0031] A baffle 7 is commonly provided between the two fixed blocks 41 on the same side of the guide rail 3. Furthermore, the baffle 7 is provided to form a seal between the two sliders 4 on the same side, thereby preventing debris generated during the workpiece processing from falling between the two fixed blocks 41, thereby reducing the difficulty of cleaning the guide rail 3 by the positioning block 5.
[0032] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. An automatic displacement mechanism for a CNC machine tool, comprising an operating table (1), characterized in that: The operating table (1) is provided with an assembly groove (11), a driving mechanism (2) is provided in the assembly groove (11), the driving mechanism (2) includes a ball screw (21), a screw nut (24) is sleeved on the ball screw (21), a connecting block (25) is fixedly connected to the screw nut (24), a support plate (26) is fixedly connected to the top of the connecting block (25), a plurality of connecting rods (27) are equidistantly provided on the support plate (26), and the tops of the plurality of connecting rods (27) are commonly connected to a second platform (8); Two guide rails (3) are symmetrically arranged on the top of the operating table (1), and guide grooves (31) are respectively provided on the two guide rails (3). Two sliders (4) are respectively slidably connected on the two guide rails (3), and fixed blocks (41) are respectively provided on the tops of the two sliders (4). Positioning blocks (5) are commonly provided between the plurality of fixed blocks (41) and the corresponding sliders (4), and corresponding side walls of the plurality of positioning blocks (5) are all provided with inclined wedge surfaces (51), and the plurality of positioning blocks (5) are respectively connected to suction mechanisms (6); A baffle (7) is provided between the two fixed blocks (41) on the guide rail (3).
2. The automatic displacement mechanism of a CNC machine tool according to claim 1, characterized in that: A limiting groove (42) and a countersunk hole (43) are respectively provided on the fixed block (41); a movable rod (44) is provided in the limiting groove (42); and a spring (45) is installed in the countersunk hole (43).
3. The automatic displacement mechanism of a CNC machine tool according to claim 2, characterized in that: One end of the movable rod (44) is fixedly connected to the side wall of the positioning block (5), and the other end of the movable rod (44) is connected to the suction mechanism (6); One end of the spring (45) is fixedly connected to the inner wall of the countersunk hole (43), and the other end of the spring (45) is fixedly connected to the side wall of the positioning block (5).
4. The automatic displacement mechanism of a CNC machine tool according to claim 3, characterized in that: The attraction mechanism (6) comprises an electromagnet (61) and an iron core (62), and the positions of the electromagnet (61) and the iron core (62) correspond to each other. The electromagnet (61) is connected to the side wall of the fixed block (41) through a fixed plate, and the iron core (62) is fixedly mounted on the end of the movable rod (44).
5. The automatic displacement mechanism of a CNC machine tool according to claim 1, characterized in that: A servo motor (22) is provided at one end of the ball screw (21), and an output shaft of the servo motor (22) is connected to the ball screw (21) via a coupling; a bearing seat (23) is provided at the other end of the ball screw (21), and the bearing seat (23) is connected to the ball screw (21) via an embedded bearing.
6. The automatic displacement mechanism of a CNC machine tool according to claim 1, characterized in that: Two brackets (12) are symmetrically arranged on the top of the operating table (1), and grooves (13) are respectively opened on the side walls of the two brackets (12), and both ends of the support plate (26) extend into the corresponding grooves (13).