Positioning device for a numerically controlled machine tool

Abstract

This application provides a positioning device for CNC machine tools, relating to the field of CNC machine tools. It includes a cutting table, with a vertical plate fixedly connected to its upper surface. A first moving mechanism is disposed on the front side of the vertical plate, and a second moving mechanism is disposed below the first moving mechanism. A laser cutting head is disposed below the second moving mechanism. A vertical groove is formed on the surface of the vertical plate, and a lifting threaded rod is rotatably connected inside the groove. This application, through the cooperation of the lifting threaded rod, bevel gear, bidirectional threaded rod, first moving plate, and clamping plate, requires only one drive motor to simultaneously complete the feed motion of the cutting head and the centering and clamping of the workpiece. It eliminates the need for a separate clamping drive source and complex sequential control programs, significantly simplifying the overall structure, reducing manufacturing costs, and avoiding the risk of collisions caused by program logic errors or sensor malfunctions, thereby improving the safety and reliability of equipment operation.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tools, and more specifically, to a positioning device for CNC machine tools. Background Technology

[0002] CNC machine tools are short for numerical control machine tools, which are automated machine tools equipped with a program control system. CNC machine tools consist of an information carrier, CNC device, servo system, machine tool body and measurement feedback device, etc. Compared with ordinary machine tools, CNC machine tools have high machining accuracy, high production efficiency and stable product quality. The system has a high degree of automation and can realize the machining of complex surfaces that are difficult or impossible to complete by ordinary machine tools.

[0003] In the prior art, Chinese utility model patent with announcement number CN223629697U discloses a cutting device for CNC machine tools. In this solution, the lifting and lowering of the laser cutting head is independently controlled by electric cylinder two, while the opposite movement of the left and right clamping plates depends on another independent motor two, screw and T-block transmission system.

[0004] However, in actual use, the independent clamping drive source (including motor, transmission screw and supporting control circuit) significantly increases the number of parts and structural complexity of the device, resulting in higher manufacturing costs, larger size, and more maintenance points. Secondly, the two sets of motion systems need to be executed step by step in the CNC program. Usually, the clamping motor is started first to fix the workpiece, and then the cutting head drive motor is started to process it. This sequential control not only prolongs the total auxiliary time for single-piece processing and reduces production efficiency, but more importantly, if there is a deviation in the program logic or abnormal sensor signal, the clamping plate may start to move before the cutting head has completely avoided the object, or the cutting head may descend before the clamping is completed, which may pose a risk of collision damage to precision parts. In view of this, we propose a positioning device for CNC machine tools to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to solve the problem of inconvenience in using some positioning devices for CNC machine tools.

[0006] To achieve the aforementioned objectives and address the aforementioned problems, this utility model provides a positioning device for a CNC machine tool, comprising a cutting table, a vertical plate fixedly connected to the upper surface of the cutting table, a first moving mechanism disposed on the front side of the vertical plate, a second moving mechanism disposed on the lower side of the first moving mechanism, a laser cutting head disposed on the lower side of the second moving mechanism, a vertical groove formed on the surface of the vertical plate, a lifting threaded rod rotatably connected inside the vertical groove, a first motor fixedly connected to the upper surface of the vertical plate, the output shaft of the first motor rotatably penetrating into the interior of the vertical groove and fixedly connected to the lifting threaded rod via a coupling, the lifting threaded rod... The external thread of the cutting rod is fitted with a lifting block, which is slidably connected inside the vertical groove. The lifting block is fixedly connected to the first moving mechanism. A horizontal groove is opened on the surface of the vertical plate. A bidirectional threaded rod is rotatably connected inside the horizontal groove. The lower end of the lifting threaded rod rotatably penetrates into the interior of the horizontal groove. A bevel gear is fixedly fitted on the lower end of the lifting threaded rod and the outside of the bidirectional threaded rod. The two bevel gears are meshed and connected. A connecting mechanism is provided on the outside of the bidirectional threaded rod. An adjusting mechanism is provided inside the horizontal groove. Two clamping plates are provided on the upper side of the cutting table. A buffer mechanism is provided on the side of the two clamping plates that are far apart from each other.

[0007] As a preferred technical solution of this application, the connecting mechanism includes two first movable plates, which are respectively threaded onto two opposite threads of the bidirectional threaded rod, and both first movable plates are slidably connected inside the transverse groove. A first fixed rod is fixedly connected to the surface of each of the two first movable plates, and the first fixed rod and the buffer mechanism are slidably engaged.

[0008] As a preferred technical solution of this application, the buffer mechanism includes a telescopic rod, which is fixedly connected to the surface of the clamping plate. A fixed column is slidably provided on the outside of the telescopic rod, and a buffer spring is fixedly connected between the inner wall of the inner cavity of the telescopic rod and the fixed column.

[0009] As a preferred technical solution of this application, a guide rod is fixedly connected to the surface of the fixed column, and the guide rod is slidably sleeved inside the first fixed rod.

[0010] As a preferred technical solution of this application, the adjusting mechanism includes a transmission rod, which is rotatably connected inside the transverse groove. Two threaded sleeves are slidably provided on the outside of the transmission rod, and the threaded sleeves are rotatably sleeved inside the first moving plate through bearings.

[0011] As a preferred technical solution of this application, the threaded sleeve is provided with a second movable plate on its external thread. The second movable plate is also slidably connected inside the transverse groove, and a second fixed rod is fixedly connected between the second movable plate and the fixed column.

[0012] As a preferred technical solution of this application, the surface of the transmission rod is provided with two synchronization grooves, and the interior of each of the two threaded sleeves is fixedly connected with a synchronization block. The threaded sleeves are slidably connected to the interior of the synchronization grooves through the synchronization blocks.

[0013] As a preferred technical solution of this application, a second motor is fixedly connected to the left side surface of the vertical plate, and the output shaft of the second motor rotates through the interior of the horizontal groove and is fixedly connected to it by a coupling and a transmission rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: In the scheme of this application: 1. Through the cooperation between the set lifting threaded rod, bevel gear, bidirectional threaded rod, first moving plate, clamping plate and other structures, only one drive motor is needed to simultaneously complete the feeding motion of the cutting head and the centering and clamping of the workpiece. There is no need for an independent clamping drive source and a complex sequence control program, which significantly simplifies the overall structure, reduces manufacturing costs, and avoids the risk of collision caused by program logic errors or sensor malfunctions, thereby improving the safety and reliability of equipment operation. 2. Through the coordination of the telescopic rod, fixed column, buffer spring, and adjustment mechanism consisting of threaded sleeve, second moving plate, and transmission rod, flexible buffering is achieved when the clamping plate contacts the workpiece, avoiding indentation or damage to the workpiece surface caused by rigid impact. This is especially suitable for positioning precision or thin-walled workpieces. On the other hand, operators can easily preset the initial spacing of the clamping plate according to the workpiece size, enabling the device to quickly adapt to workpieces of different specifications without frequent fixture changes, greatly improving the versatility and production changeover efficiency of the device. Attached Figure Description

[0015] Figure 1 A schematic diagram of the positioning device for CNC machine tools provided in this application; Figure 2 A schematic diagram of the vertical plate in the positioning device for CNC machine tools provided in this application; Figure 3 A cross-sectional view of the vertical plate in the positioning device for CNC machine tools provided in this application; Figure 4 A schematic diagram of the transmission rod in the positioning device for CNC machine tools provided in this application; Figure 5 This is a cross-sectional structural schematic diagram of the fixed column in the positioning device for CNC machine tools provided in this application.

[0016] The image shows: 1. Cutting table; 2. Vertical plate; 3. First moving mechanism; 4. Second moving mechanism; 5. Laser cutting head; 6. Vertical groove; 7. Lifting threaded rod; 8. Lifting block; 9. First motor; 10. Bidirectional threaded rod; 11. Bevel gear; 12. First moving plate; 13. Clamping plate; 14. Horizontal groove; 15. Threaded sleeve; 16. Second moving plate; 17. Second fixed rod; 18. Fixed column; 19. Telescopic rod; 20. Buffer spring; 21. First fixed rod; 22. Guide rod; 23. Transmission rod; 24. Synchronization groove; 25. Synchronization block; 26. Second motor. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the protection scope of the present invention.

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0019] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] Please refer to Figures 1-5A positioning device for a CNC machine tool includes a cutting table 1, a vertical plate 2 fixedly connected to the upper surface of the cutting table 1, a first moving mechanism 3 arranged on the front side of the vertical plate 2, a second moving mechanism 4 arranged on the lower side of the first moving mechanism 3, a laser cutting head 5 arranged on the lower side of the second moving mechanism 4, a vertical groove 6 formed on the surface of the vertical plate 2, a lifting threaded rod 7 rotatably connected inside the vertical groove 6, a first motor 9 fixedly connected to the upper surface of the vertical plate 2, the output shaft of the first motor 9 rotatably passing through the interior of the vertical groove 6 and fixedly connected to the lifting threaded rod 7 via a coupling, and a lifting block 8 threadedly fitted onto the outer thread of the lifting threaded rod 7. The lowering block 8 is slidably connected inside the vertical groove 6. The lifting block 8 and the first moving mechanism 3 are fixedly connected. A horizontal groove 14 is opened on the surface of the vertical plate 2. A bidirectional threaded rod 10 is rotatably connected inside the horizontal groove 14. The lower end of the lifting threaded rod 7 rotatably passes through the interior of the horizontal groove 14. A bevel gear 11 is fixedly sleeved on the lower end of the lifting threaded rod 7 and the exterior of the bidirectional threaded rod 10. The two bevel gears 11 are meshed and connected. A connecting mechanism is provided on the exterior of the bidirectional threaded rod 10. An adjustment mechanism is provided inside the horizontal groove 14. Two clamping plates 13 are provided on the upper side of the cutting table 1. A buffer mechanism is provided on the side of the two clamping plates 13 that are far apart from each other.

[0022] In the above embodiments, the first moving mechanism 3, the second moving mechanism 4, and the laser cutting head 5 are all conventional technical means in the art. Since they are technical means known to those skilled in the art, they will not be described in detail here.

[0023] Furthermore, such as Figures 1-5 As shown, the connecting mechanism includes two first movable plates 12, which are respectively threaded onto two opposite threads of the bidirectional threaded rod 10. Both first movable plates 12 are slidably connected inside the transverse groove 14. A first fixed rod 21 is fixedly connected to the surface of each of the two first movable plates 12. The first fixed rod 21 and the buffer mechanism are slidably engaged.

[0024] With this setup, the first motor 9 is started by an external controller. The rotation of the output shaft of the first motor 9 drives the rotation of the lifting threaded rod 7. The rotation of the lifting threaded rod 7 drives the movement of the lifting block 8. The movement of the lifting block 8 drives the first moving mechanism 3, the second moving mechanism 4, and the laser cutting head 5 to move up and down. At the same time, when the lifting threaded rod 7 rotates, the cooperation of the two bevel gears 11 drives the rotation of the bidirectional threaded rod 10. The rotation of the bidirectional threaded rod 10 drives the first moving plate 12 to slide inside the transverse groove 14, thereby driving the buffer mechanism and the clamping plate 13 to move. This allows the clamping plate 13 to clamp and position the workpiece to be processed while the laser cutting head 5 descends.

[0025] Furthermore, with the cooperation of the first moving mechanism 3 and the second moving mechanism 4, the laser cutting head 5 can also be moved forward and backward and left and right.

[0026] Furthermore, such as Figures 1-5 As shown, the buffer mechanism includes a telescopic rod 19, which is fixedly connected to the surface of the clamping plate 13. A fixed post 18 is slidably provided on the outside of the telescopic rod 19, and a buffer spring 20 is fixedly connected between the inner wall of the inner cavity of the telescopic rod 19 and the fixed post 18.

[0027] Furthermore, such as Figures 1-5 As shown, a guide rod 22 is fixedly connected to the surface of the fixed column 18, and the guide rod 22 is slidably sleeved inside the first fixed rod 21.

[0028] With this setup, by utilizing the cooperation between the telescopic rod 19, the fixed column 18, and the buffer spring 20, when the clamping plate 13 contacts the workpiece, the telescopic rod 19 will slide adaptively inside the fixed column 18, and the buffer spring 20 will deform adaptively.

[0029] Furthermore, such as Figures 1-5 As shown, the adjustment mechanism includes a transmission rod 23, which is rotatably connected inside the transverse groove 14. Two threaded sleeves 15 are slidably arranged on the outside of the transmission rod 23, and the threaded sleeves 15 are rotatably sleeved inside the first moving plate 12 through bearings.

[0030] Furthermore, such as Figures 1-5 As shown, the threaded sleeve 15 is threaded with a second movable plate 16, which is also slidably connected inside the transverse groove 14, and a second fixed rod 17 is fixedly connected between the second movable plate 16 and the fixed post 18.

[0031] With this configuration, when the first moving plate 12 slides inside the transverse groove 14, it will drive the threaded sleeve 15 to move synchronously. Since the second moving plate 16 is threadedly connected to the threaded sleeve 15, the movement of the threaded sleeve 15 will drive the movement of the second moving plate 16. The movement of the second moving plate 16 can drive the movement of the second fixed rod 17 and the buffer mechanism, thereby adjusting the initial position of the clamping plate 13 to adapt to different specifications of workpieces to be processed.

[0032] Furthermore, such as Figures 1-5 As shown, two synchronization grooves 24 are opened on the surface of the transmission rod 23, and synchronization blocks 25 are fixedly connected inside the two threaded sleeves 15. The threaded sleeves 15 are slidably connected to the inside of the synchronization grooves 24 through the synchronization blocks 25.

[0033] With this configuration, when the transmission rod 23 rotates, the threaded sleeve 15 can be rotated by the cooperation of the synchronization groove 24 and the synchronization block 25.

[0034] Furthermore, such as Figures 1-5 As shown, a second motor 26 is fixedly connected to the left side surface of the vertical plate 2. The output shaft of the second motor 26 rotates through the interior of the horizontal groove 14 and is fixedly connected to the transmission rod 23 via a coupling.

[0035] With this setup, starting the second motor 26 via an external controller will drive the rotation of the transmission rod 23, which in turn will drive the rotation of the threaded sleeve 15.

[0036] The positioning device for CNC machine tools provided by this utility model is used as follows: First, based on the size of the workpiece to be processed, the initial distance between the two clamping plates 13 is preset by adjusting the mechanism. Specifically, the second motor 26 is started by an external controller. The second motor 26 drives the transmission rod 23 to rotate. The transmission rod 23 drives the two threaded sleeves 15 to rotate synchronously through the cooperation of the synchronous groove 24 and the synchronous block 25. The rotation of the threaded sleeves 15 causes the second moving plate 16 with its external thread to slide along the transverse groove 14. The second moving plate 16 drives the fixed column 18 and the clamping plate 13 to move through the second fixed rod 17, thereby adjusting the clamping range to accommodate workpieces of different widths.

[0037] After initial adjustment, the workpiece is placed on the cutting table 1, and the first motor 9 is started. The first motor 9 drives the lifting threaded rod 7 to rotate. When the lifting threaded rod 7 rotates, on the one hand, it drives the first moving mechanism 3, the second moving mechanism 4 and the laser cutting head 5 to descend smoothly along the vertical groove 6 through the lifting block 8; on the other hand, the lifting threaded rod 7 transmits power to the bidirectional threaded rod 10 through two meshing bevel gears 11. When the bidirectional threaded rod 10 rotates, since its two thread directions are opposite, the two first moving plates 12 will slide synchronously towards each other in the horizontal groove 14. The first moving plates 12 drive the fixed column 18 and the clamping plate 13 to move closer to the middle through the first fixed rod 21 and the guide rod 22.

[0038] After the clamping plate 13 contacts the workpiece surface, the laser cutting head 5 continues to descend. At this time, the buffer mechanism starts to work: the telescopic rod 19 retracts into the fixed column 18, and the buffer spring 20 is compressed, thereby buffering the clamping force and preventing the workpiece from being pinched. Thus, the linkage between the descent and cutting of the laser cutting head 5 and the automatic clamping of the workpiece by the clamping plate 13 is realized. During the cutting process, the front-back and left-right positions of the laser cutting head 5 can also be adjusted by the first moving mechanism 3 and the second moving mechanism 4 to complete complex cutting trajectories.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this 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 specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A positioning device for a CNC machine tool, characterized in that, The device includes a cutting table (1), a vertical plate (2) fixedly connected to the upper surface of the cutting table (1), a first moving mechanism (3) provided on the front side of the vertical plate (2), a second moving mechanism (4) provided on the lower side of the first moving mechanism (3), a laser cutting head (5) provided on the lower side of the second moving mechanism (4), a vertical groove (6) opened on the surface of the vertical plate (2), a lifting threaded rod (7) rotatably connected inside the vertical groove (6), a first motor (9) fixedly connected to the upper surface of the vertical plate (2), the output shaft of the first motor (9) rotatably penetrates into the interior of the vertical groove (6) and is fixedly connected to the lifting threaded rod (7) through a coupling, a lifting block (8) is threaded on the outer side of the lifting threaded rod (7), and the lifting block (8) slides. The lifting block (8) and the first moving mechanism (3) are fixedly connected inside the vertical groove (6). A horizontal groove (14) is opened on the surface of the vertical plate (2). A bidirectional threaded rod (10) is rotatably connected inside the horizontal groove (14). The lower end of the lifting threaded rod (7) rotatably penetrates into the interior of the horizontal groove (14). A bevel gear (11) is fixedly sleeved on the lower end of the lifting threaded rod (7) and the outside of the bidirectional threaded rod (10). The two bevel gears (11) are meshed and connected. A connecting mechanism is provided on the outside of the bidirectional threaded rod (10). An adjustment mechanism is provided inside the horizontal groove (14). Two clamping plates (13) are provided on the upper side of the cutting table (1). A buffer mechanism is provided on the side of the two clamping plates (13) that are far apart from each other.

2. A positioning device for a CNC machine tool according to claim 1, characterized in that, The connecting mechanism includes two first movable plates (12), which are respectively threaded onto two opposite threads of the bidirectional threaded rod (10), and both first movable plates (12) are slidably connected inside the transverse groove (14). A first fixed rod (21) is fixedly connected to the surface of both first movable plates (12), and the first fixed rod (21) and the buffer mechanism are slidably engaged.

3. A positioning device for a CNC machine tool according to claim 2, characterized in that, The buffer mechanism includes a telescopic rod (19), which is fixedly connected to the surface of the clamping plate (13). A fixed column (18) is slidably provided on the outside of the telescopic rod (19), and a buffer spring (20) is fixedly connected between the inner wall of the inner cavity of the telescopic rod (19) and the fixed column (18).

4. A positioning device for a CNC machine tool according to claim 3, characterized in that, A guide rod (22) is fixedly connected to the surface of the fixed column (18), and the guide rod (22) is slidably sleeved inside the first fixed rod (21).

5. A positioning device for a CNC machine tool according to claim 4, characterized in that, The adjusting mechanism includes a transmission rod (23), which is rotatably connected inside the transverse groove (14). Two threaded sleeves (15) are slidably provided on the outside of the transmission rod (23), and the threaded sleeves (15) are rotatably sleeved inside the first moving plate (12) through bearings.

6. A positioning device for a CNC machine tool according to claim 5, characterized in that, The threaded sleeve (15) is threaded with a second movable plate (16), which is also slidably connected inside the transverse groove (14), and a second fixed rod (17) is fixedly connected between the second movable plate (16) and the fixed column (18).

7. A positioning device for a CNC machine tool according to claim 6, characterized in that, The transmission rod (23) has two synchronization grooves (24) on its surface. Both threaded sleeves (15) are fixedly connected to a synchronization block (25). The threaded sleeves (15) are slidably connected to the inside of the synchronization grooves (24) through the synchronization blocks (25).

8. A positioning device for a CNC machine tool according to claim 7, characterized in that, The left side surface of the vertical plate (2) is fixedly connected to a second motor (26). The output shaft of the second motor (26) rotates through the interior of the horizontal groove (14) and is fixedly connected to the transmission rod (23) via a coupling.

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