High-precision gantry numerical control machine tool

Abstract

The application discloses a high-precision gantry numerical control machine tool, which comprises a workbench, a gantry arranged on the workbench, a first sliding table arranged on the workbench and moving along an x direction, a second sliding table arranged on the gantry and moving along a y direction, and a third sliding table arranged on the second sliding table and moving along a z direction; the first sliding table and the third sliding table are both provided with connectors, the first sliding table is connected with a first connecting rod assembly through the connectors, the third sliding table is connected with a guide column through the connectors, the guide column is slidably connected with a second connecting rod assembly, and the first connecting rod assembly and the second connecting rod assembly are movably connected through a connecting rod. The first connecting rod assembly and the second connecting rod assembly are arranged in cooperation with the connectors, so that the movement precision of the whole displacement component is ensured, and the workpiece machining precision is improved.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tool technology, and more specifically, to a high-precision gantry CNC machine tool. Background Technology

[0002] A gantry milling machine is a machine tool whose spindle axis is perpendicular to the worktable. Its overall structure is a portal frame, consisting of double columns and a top beam, with a crossbeam in the middle. It is suitable for machining large and complex-shaped workpieces.

[0003] Currently, most CNC machine tools on the market are multi-axis machine tools. In order to ensure machining accuracy, precise positioning and guidance of displacement components are required.

[0004] As disclosed in the prior art (Publication No.: CN113245903B), a five-axis CNC machining center with a high-precision positioning mechanism is provided. The positioning device ensures high-precision positioning of the machining head and the part storage plate during use. Furthermore, the guide rod can rotate between the guide rod and the fixed base, and the sliding sleeve can rotate between the sliding sleeve and the fixed sleeve. The guide rod can be retracted into the sliding sleeve, ensuring that the machining head can move left and right, and the part storage plate can move back and forth, facilitating use.

[0005] An adjustment device is provided, which can push the component to the center position of the component storage plate. The clamping and limiting device can clamp the processed component.

[0006] While the aforementioned technologies can perform high-precision operations, CNC machine tools experience vibrations during operation, such as drilling and milling, on the machining head and parts storage plate. Since the positioning device is located on the machining head and parts storage plate, it is also affected by the vibration. Under the vibration force, frequent small displacements occur between the guide sleeve and guide post, as well as between the sliding sleeve and guide rod, leading to severe wear. At the same time, the bearings and hinges in the positioning device are also affected to a certain extent, thus affecting the overall precision positioning and guiding accuracy, which is detrimental to the workpiece machining quality.

[0007] Secondly, the workpiece needs to be pushed to the designated position by the adjustment device and clamped by the clamping and limiting device. This requires two devices to load and clamp the workpiece, which is cumbersome to operate. Moreover, only one workpiece can be processed at a time, requiring frequent loading and unloading, which is not conducive to the overall work efficiency and has shortcomings. Summary of the Invention

[0008] The present invention aims to solve the problems of vibration affecting the accurate positioning of guide columns and low processing efficiency during the processing process.

[0009] Therefore, the purpose of this invention is to provide a high-precision gantry CNC machine tool, including a worktable and a gantry frame mounted on the worktable.

[0010] The workbench is provided with a first sliding table that moves along the x-direction, the gantry frame is provided with a second sliding table that moves along the y-direction, and the second sliding table is provided with a third sliding table that moves along the z-direction.

[0011] Both the first sliding table and the third sliding table are provided with connectors on their sides. The first sliding table is connected to a first linkage assembly through the connector, and the third sliding table is connected to a guide post through the connector. The guide post is slidably connected to a second linkage assembly, and the first linkage assembly and the second linkage assembly are movably connected through a connecting rod.

[0012] The connector includes a mounting plate and a first electromagnet fixed to the mounting plate, and a connecting post that mates with the first electromagnet. The top surface of the connecting post has a first groove and a second groove sequentially formed from top to bottom. The bottom surface of the connecting post extends axially to form a guide rod. A magnet is embedded in the bottom of the second groove. The end of the magnet opposite to the first electromagnet is a dissimilar magnetic pole. The bottom end of the guide rod extends into a fixed cylinder. When the first electromagnet is energized, it connects to the connecting post and when it is de-energized, it separates from the connecting post.

[0013] The first sliding platform is provided with a placement plate for placing materials. The placement plate has a long strip-shaped placement groove. The placement plate is provided with a first chain drive mechanism and a second chain drive mechanism. The first chain drive mechanism and the second chain drive mechanism are respectively provided with a first crossbar and a second crossbar evenly distributed. One end of the first crossbar and the second crossbar extends into the placement groove for conveying and clamping the workpiece.

[0014] As a preferred technical solution:

[0015] As described above, in a high-precision gantry CNC machine tool, the mounting plate is bolted to the side walls of the first sliding table and the third sliding table, and the mounting plate is symmetrically arranged about the first sliding table and the third sliding table.

[0016] The above technical solution, with its symmetrical design, allows for the provision of two first and two second linkage assemblies, thereby improving the precise positioning and guiding effect of the first, second, and third sliding tables.

[0017] As described above, in a high-precision gantry CNC machine tool, the first electromagnet, the connecting column, the first groove and the second groove are all coaxial and vertically arranged. The first groove and the second groove are both cylindrical grooves, and the first electromagnet is cylindrical in shape.

[0018] The inner diameter of the first groove is larger than the diameter of the first electromagnet, and the inner diameter of the second groove is equal to the diameter of the first electromagnet.

[0019] Through the above technical solution, the size settings of the first groove and the second groove ensure that when the first electromagnet is located in the first groove, the vibration of the first sliding table and the third sliding table will not be transmitted to the first link assembly and the second link assembly through the first electromagnet due to the gap between the first electromagnet and the first groove, thereby ensuring the accurate positioning and guiding effect of the first link assembly and the second link assembly.

[0020] As described above, in a high-precision gantry CNC machine tool, the first connecting rod assembly includes a first connecting plate and a second connecting plate. The two ends of the first connecting plate are movably connected to the bearings of the first shaft and the second shaft, and one end of the second connecting plate is movably connected to the bearing of the first shaft.

[0021] With the above technical solution, when the first sliding table moves along the x-direction, the first sliding table can pull the first shaft through the connector, and pull the first connecting plate through the first shaft. The first connecting plate can then pull the second connecting plate through the second shaft, thereby accurately positioning and guiding the first sliding table through the first and second connecting plates.

[0022] As described above, in a high-precision gantry CNC machine tool, the second connecting rod assembly includes a third connecting plate and a fourth connecting plate. The guide cylinders at both ends of the third connecting plate are movably connected to the bearing of the third shaft, and one end of the fourth connecting plate is movably connected to the bearing of the third shaft.

[0023] With the above technical solution, when the third sliding table moves along the z-direction, it will pull the guide column through the connector. The guide column will be pulled to the third connecting plate through the guide cylinder. The third connecting plate will pull the fourth connecting plate through the third shaft. Thus, the third sliding table can be accurately positioned and guided by the third connecting plate and the fourth connecting plate.

[0024] As described above, in a high-precision gantry CNC machine tool, the opposite ends of the second connecting plate and the fourth connecting plate are movably connected to the connecting rod bearing. The connecting rod is U-shaped and is welded and fixed to the fixed plate. The bottom end of the fixed plate is fixed perpendicularly to the surface of the worktable.

[0025] The above technical solution, with its connecting rod and fixing plate, allows the first and second connecting rod assemblies to be fixed in place, ensuring that they always cooperate with the first and third sliding tables, resulting in a reasonable structure.

[0026] As described above, in a high-precision gantry CNC machine tool, ball grooves are evenly provided on the inner wall of the guide cylinder, and spherical balls are provided in the ball grooves, with the balls contacting the outer wall of the guide column.

[0027] The outer wall of the guide cylinder has a countersunk hole, and a second electromagnet is fixed to the outer wall of the guide cylinder by a bracket. A magnetic column passes through the countersunk hole, and an arc-shaped limiting piece is welded and fixed to the bottom end of the magnetic column. The limiting piece is embedded in the inner wall of the guide cylinder.

[0028] The end of the second electromagnet opposite to the magnetic column is a magnetic pole of the same name. The longitudinal section of the second electromagnet is T-shaped. The second electromagnet is connected to the countersunk hole through a spring.

[0029] Through the above technical solution, the ball can roll in the ball groove, thereby greatly reducing the friction between the guide post and the guide cylinder and improving the precision positioning and guiding accuracy.

[0030] As described above, in a high-precision gantry CNC machine tool, the walls of the placement plates on both sides of the placement slot are respectively provided with a first cavity and a second cavity. The wall of the placement plate at the bottom of the placement slot is provided with a connecting groove and a dust collection chamber. The dust collection chamber and the placement slot are connected through the connecting groove.

[0031] The first cavity and the second cavity are both connected to the placement slot. The first chain drive mechanism is located in the first cavity, and the second chain drive mechanism is located in the second cavity.

[0032] With the above technical solution, the workpiece is placed into the placement slot during operation, and the workpiece is sent to the connecting slot by the first chain transmission mechanism and the second chain transmission mechanism. At this time, the waste generated during processing will fall into the vicinity of the connecting slot. A dust suction pipe is inserted into the placement plate wall on one side of the dust collection chamber, and a dust suction fan is connected to one end of the dust suction pipe. The dust can be sucked away through the connecting slot and the dust collection chamber for centralized treatment by the dust suction fan, thus ensuring the cleanliness of the CNC machine tool.

[0033] As described above, in a high-precision gantry CNC machine tool, the first chain transmission mechanism includes a first driving wheel and a first driven wheel whose two ends are connected to bearings on the inner wall of the first cavity. Each of the first driving wheel and the first driven wheel is provided with two sprockets. The sprockets on the first driving wheel and the first driven wheel are fitted with a meshing first chain. A first crossbar is welded and fixed on the first chain.

[0034] The second chain drive mechanism includes a second driving wheel and a second driven wheel whose two ends are connected to bearings on the inner wall of the second cavity. A sprocket is fitted on both the second driving wheel and the second driven wheel. A second chain is fitted on the sprockets on the second driving wheel and the second driven wheel and is engaged with the chain. A second crossbar is welded and fixed on the second chain.

[0035] The two first chains and the second chain are staggered on a horizontal plane.

[0036] With the above technical solution, the placement plate is equipped with a motor that connects to the first drive wheel and the second drive wheel. The motor can drive the first drive wheel and the second drive wheel to rotate. The first drive wheel, in conjunction with the first driven wheel, can drive the first chain to rotate. The second drive wheel, in conjunction with the second driven wheel, can drive the second chain to rotate. When the first chain and the second chain rotate, the first crossbar and the second crossbar can push the workpiece to move in the placement slot, thereby realizing automatic feeding.

[0037] As described above, in a high-precision gantry CNC machine tool, a fixing sleeve is fitted on both the first and second crossbars. The outer wall of the fixing sleeve is provided with a long strip-shaped limiting groove, and the cross-section of the limiting groove is a right-angled "U" shape.

[0038] The inner walls of both the first cavity and the second cavity are welded with limiting plates that match the limiting grooves, and the limiting plates are elongated strips.

[0039] With the above technical solution, both the first chain and the second chain are "O" shaped, so that the two ends of the first chain and the second chain are arc-shaped and the middle is straight. When the first crossbar is located on the straight part of the first chain, the first crossbar moves in a straight line with the first chain. The second crossbar does the same. In this way, the fixing sleeves on the first crossbar and the second crossbar move in a straight line synchronously. The limiting groove on the fixing sleeve can engage with the limiting plate. The limiting groove and the limiting plate cooperate with each other to limit the first crossbar and the second crossbar, so that the first crossbar and the second crossbar can only move along the length direction of the limiting plate, thereby ensuring the clamping effect of the first crossbar and the second crossbar in the future.

[0040] The advantages of the high-precision gantry CNC machine tool of the present invention are as follows:

[0041] This invention includes a connector, and a first link assembly and a second link assembly that cooperate with the connector. When the first sliding stage moves along the x-direction, the connector pulls the first link assembly, which, under the constraint of the two first link assemblies, provides precise positioning and guidance for the first sliding stage. When the second sliding stage moves along the y-direction, the guide post provides precise positioning and guidance for the second sliding stage. When the third sliding stage moves along the z-direction, the connector pulls the second link assembly, which, under the constraint of the two second link assemblies, provides precise positioning and guidance for the third sliding stage. This ensures the movement accuracy of the entire displacement component, thereby improving the workpiece machining accuracy.

[0042] The connector of the present invention consists of a first electromagnet and a connecting post. When the sliding table is in a stationary state, the first electromagnet is located in the first groove. Due to the vibration during processing, it will be transmitted to the sliding table. The size setting of the first groove ensures that the first electromagnet will not transmit the vibration force to the connecting post when it vibrates. This ensures that the first link assembly and the second link assembly are not affected by vibration, thereby guaranteeing the service life and accurate positioning and guiding effect of the first link assembly and the second link assembly.

[0043] This invention features a first chain drive mechanism and a second chain drive mechanism. When the first and second chain drive mechanisms rotate in opposite directions, the workpiece can be moved within the placement slot via the first and second crossbars. Multiple crossbars are provided, and workpieces can be placed in adjacent crossbars, enabling continuous feeding. After feeding is complete, the second chain drive mechanism rotates, and the first and second crossbars clamp the workpiece. This makes workpiece feeding and clamping operations convenient and greatly improves work efficiency. Attached Figure Description

[0044] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein

[0045] Figure 1 This is a front view of the present invention;

[0046] Figure 2 This is a side view of the present invention;

[0047] Figure 3 This is a longitudinal sectional view of the connector of the present invention;

[0048] Figure 4 This is a perspective view of the first electromagnet and the connecting post of the present invention;

[0049] Figure 5 This is a side longitudinal sectional view of the guide post and guide cylinder of the present invention;

[0050] Figure 6 This is a cross-sectional view of the placement plate of the present invention;

[0051] Figure 7 This is a top view of the interior of the placement plate of the present invention;

[0052] Figure 8 This is a diagram showing the clamping state of the first and second crossbars of the present invention;

[0053] Figure 9 This is a perspective view of the fixing sleeve and limiting plate of the present invention.

[0054] In the diagram: 1. Workbench; 2. Gantry frame; 3. First sliding table; 4. Second sliding table; 5. Third sliding table; 6. Placement plate; 7. Connector; 701. Mounting plate; 702. First electromagnet; 703. Connecting column; 704. Fixing cylinder; 705. First groove; 706. Second groove; 707. Guide rod; 8. First shaft; 9. Second shaft; 10. First connecting plate; 11. Second connecting plate; 12. Connecting rod; 13. Fixing plate; 14. Guide rod. 15. Guide cylinder; 16. Third connecting plate; 17. Fourth connecting plate; 18. Third shaft; 19. Ball bearing; 20. Ball bearing groove; 21. Placement groove; 22. First cavity; 23. First chain; 24. First crossbar; 25. Second cavity; 26. Second chain; 27. Second crossbar; 28. Dust collection chamber; 29. ​​Connecting groove; 30. Fixing sleeve; 31. Limiting groove; 32. Limiting plate; 33. Second electromagnet; 34. Magnetic column; 35. Limiting piece. Detailed Implementation

[0055] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0056] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0057] Please see Figure 1-9 The present invention provides a technical solution: a high-precision gantry CNC machine tool, including a worktable 1 and a gantry frame 2 disposed on the worktable 1.

[0058] like Figure 1-2 As shown, the x, y, and z directions are perpendicular to each other. A first sliding table 3, moving along the x-direction, is provided on the worktable 1. A second sliding table 4, moving along the y-direction, is provided on the gantry 2. A third sliding table 5, moving along the z-direction, is provided on the second sliding table 4. A processing tool is provided on the third sliding table 5. Connectors 7 are provided on the sides of both the first and third sliding tables 3 and 5. The first sliding table 3 is connected to a first connecting rod assembly via the connectors 7 on its side. The third sliding table 5 is connected to a guide post 14 via the connectors 7 on its side. The guide post 14 is slidably connected to a second connecting rod assembly. The first and second connecting rod assemblies are movably connected via a connecting rod 12.

[0059] When the first sliding table 3 and the third sliding table 5 move, they can pull the first link assembly and the second link assembly through the connector 7 on their respective sides. The first link assembly and the second link assembly can play a role in precise positioning and guidance. When the second sliding table 4 moves in the y direction, it can drive the third sliding table 5 to move synchronously. The guide post 14 can indirectly provide precise positioning and guidance for the second sliding table 4 through the third sliding table 5, and limit the displacement of the second sliding table 4 in the z direction. This ensures the sliding accuracy of the sliding table 4 in the y direction, thereby improving the workpiece processing quality.

[0060] like Figure 6 As shown, a placement plate 6 for placing materials is provided on the first sliding table 3. The processing tool can process the materials on the placement plate 6. A long strip-shaped placement groove 21 is provided on the placement plate 6. A first chain drive mechanism and a second chain drive mechanism are provided inside the placement plate 6. A first crossbar 24 and a second crossbar 27 are respectively provided on the first chain drive mechanism and the second chain drive mechanism. One end of the first crossbar 24 and the second crossbar 27 extends into the placement groove 21 for conveying and clamping the workpiece.

[0061] During operation, the workpiece can be placed between two adjacent first crossbars 24 and second crossbars 27. When the first crossbars 24 and second crossbars 27 move with the first chain drive mechanism and the second chain drive mechanism, the workpiece can be moved in the placement groove 21, thereby realizing continuous feeding.

[0062] Please see Figure 7 The first crossbar 24 and the second crossbar 27 can be moved in the same direction to load materials. When the second crossbar 27 moves in the opposite direction, the first crossbar 24 can cooperate with the second crossbar 27 to clamp the workpiece.

[0063] like Figure 1 , Figure 3 and Figure 4 As shown, connector 7 includes a mounting plate 701 and a first electromagnet 702 fixed on the mounting plate 701, and a connecting post 703 that mates with the first electromagnet 702. The top surface of the connecting post 703 has a first groove 705 and a second groove 706 sequentially formed from top to bottom. A guide rod 707 extends axially from the bottom surface of the connecting post 703. A magnet is embedded in the bottom of the second groove 706, with the magnet and the opposite end of the first electromagnet 702 having opposite magnetic poles. The bottom end of the guide rod 707 extends into the fixed cylinder 704. The length of the guide rod 707 is greater than the distance between the first electromagnet 702 and the second groove 706 to ensure that when the first electromagnet 702 is connected to the magnet at the bottom of the second groove 706, the guide rod 707 remains within the fixed cylinder 704.

[0064] When the first sliding stage 3, the second sliding stage 4, or the third sliding stage 5 moves, the first electromagnet 702 is energized and generates an attractive force with the magnetic block. Under the action of the attractive force, the connecting post 703 can move towards the first electromagnet 702. At this time, the first electromagnet 702 is inserted into the second groove 706. The size design of the second groove 706 allows the first electromagnet 702 to be attracted to the connecting post 703 as one unit. The bottom end of the guide rod 707 is still inside the fixed cylinder 704. In this way, the first connecting rod assembly and the second connecting rod assembly can be pulled through the fixed cylinder 704 without affecting the positional relationship of 704. During the research and development process, the inventors found that if the fixed cylinder 704 and the connecting post 703 are designed as a whole, it will cause the fixed cylinder 704 to displace in the z-direction when energized, causing displacement of the first connecting rod assembly or the second connecting rod assembly, resulting in stiffness, which affects the service life and accuracy of the equipment.

[0065] Furthermore, the mounting plate 701 is bolted to the side walls of the first sliding table 3 and the third sliding table 5, and the mounting plate 701 is symmetrically arranged about the first sliding table 3 and the third sliding table 5.

[0066] In this embodiment, the first electromagnet 702, the connecting post 703, the first groove 705, and the second groove 706 are all coaxial and vertically arranged. Both the first groove 705 and the second groove 706 are cylindrical grooves. The first electromagnet 702 is cylindrical in shape. The inner diameter of the first groove 705 is larger than the diameter of the first electromagnet 702, and the inner diameter of the second groove 706 is equal to the diameter of the first electromagnet 702. In other embodiments, the above components can also be designed as cuboids, achieving the same technical effect as this invention.

[0067] The first sliding stage 3, the second sliding stage 4, and the third sliding stage 5 are all driven by cylinders. The first electromagnet 702 in the connector 7 on the first sliding stage 3 is connected in series with the cylinder on it, so that the cylinder and the first electromagnet 702 can be energized and run synchronously.

[0068] The two cylinders on the second sliding table 4 and the third sliding table 5 are connected in parallel with the first electromagnet 702 on the third sliding table 5, so that the first electromagnet 702 can be energized and run synchronously whether the cylinders on the second sliding table 4 or the third sliding table 5 are running.

[0069] Understandably, when the first sliding table 3, the second sliding table 4, and the third sliding table 5 are stationary, the first electromagnet 702 is not energized and therefore has no magnetism. At this time, under the action of gravity, the connecting column 703 moves downward along the fixed cylinder 704 through the guide rod 707, thereby placing the first electromagnet 702 in the first groove 705. The size design of the first groove 705 ensures that the first electromagnet 702 and the first groove 705 do not contact each other, thus preventing the vibration on the first sliding table 3 and the third sliding table 5 from being transmitted to the first connecting rod assembly and the second connecting rod assembly during processing, thereby affecting the overall processing accuracy and the service life of the equipment.

[0070] like Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, the first connecting rod assembly includes a first connecting plate 10 and a second connecting plate 11. The two ends of the first connecting plate 10 are movably connected to the bearings of the first shaft 8 and the second shaft 9, and one end of the second connecting plate 11 is movably connected to the bearing of the first shaft 8. In other embodiments, the first connecting rod assembly may also include other connecting plates. The number of connecting plates is not limited, but is not less than two; three, four, and five connecting plates can all achieve the technical effects of this invention.

[0071] In this embodiment, the second connecting rod assembly includes a third connecting plate 16 and a fourth connecting plate 17. The guide cylinders 15 at both ends of the third connecting plate 16 are movably connected to the bearings of the third shaft 18, and one end of the fourth connecting plate 17 is movably connected to the bearing of the third shaft 18. In other embodiments, the second connecting rod assembly may also include other connecting plates. The number of connecting plates is not limited, but not less than two. For example, three, four, and five connecting plates can all achieve the technical effects of the present invention.

[0072] The opposite ends of the second connecting plate 11 and the fourth connecting plate 17 are movably connected to the connecting rod 12 bearing. The connecting rod 12 is U-shaped and is welded and fixed to the fixing plate 13. The bottom end of the fixing plate 13 is fixed perpendicularly to the surface of the worktable 1.

[0073] The inner wall of the guide cylinder 15 is evenly provided with ball grooves 20, and spherical balls 19 are provided in the ball grooves 20. The balls 19 are in contact with the outer wall of the guide column 14.

[0074] A countersunk hole is provided on the outer wall of the guide cylinder 15. A second electromagnet 33 is fixed to the outer wall of the guide cylinder 15 by a bracket. A magnetic column 34 passes through the countersunk hole. An arc-shaped limiting piece 35 is welded and fixed to the bottom end of the magnetic column 34. The limiting piece 35 is embedded in the inner wall of the guide cylinder 15.

[0075] The end of the second electromagnet 33 opposite to the magnet post 34 has the same magnetic pole. The longitudinal section of the second electromagnet 33 is T-shaped. The second electromagnet 33 is connected to the countersunk hole through a spring.

[0076] Understandably, when the third sliding table 5 moves along the z-direction, the second electromagnet 33 is simultaneously energized, thus generating a repulsive force between the second electromagnet 33 and the magnetic column 34. Under the action of the repulsive force, the magnetic column 34 drives the limiting plate 35 to move, causing the limiting plate 35 to press against the outer wall of the guide column 14. The surface of the limiting plate 35 is frosted, which increases the friction with the guide column 14, thereby preventing the guide column 14 and the guide cylinder 15 from sliding relative to each other, ensuring that when the third sliding table 5 moves in the z-direction, it will not move in the y-direction.

[0077] When the second sliding table 4 needs to move along the y direction, the second electromagnet 33 is de-energized, and the magnet column 34 drives the limit plate 35 to reset under the elastic force of the spring. In this way, the guide column 14 and the guide cylinder 15 can slide relative to each other again, so that the second sliding table 4 can move along the y direction.

[0078] When the first sliding table 3 moves along the x-direction, the first sliding table 3 can drive the connecting column 703 and the fixed cylinder 704 to move synchronously through the first electromagnet 702. The fixed cylinder 704 can pull the first connecting plate 10 and the second connecting plate 11 through the first shaft 8. The first connecting plate 10 and the second connecting plate 11 are both movable structures, so they can rotate as the first sliding table 3 moves. The first connecting plate 10 and the second connecting plate 11 are used to transmit the displacement of the first sliding table 3 along the x-direction and limit the displacement of the first sliding table 3 in the y-direction, thereby achieving precise positioning and guidance of the first sliding table 3.

[0079] When the third sliding table 5 moves along the z-direction, the third sliding table 5 can drive the connecting column 703 and the fixed cylinder 704 to move synchronously through the first electromagnet 702. The fixed cylinder 704 drives the guide cylinder 15 to move along the z-direction through the guide column 14. The guide cylinder 15 can pull the third connecting plate 16 and the fourth connecting plate 17. The third connecting plate 16 and the fourth connecting plate 17 are both movable structures, so they can rotate as the third sliding table 5 moves. The third connecting plate 16 and the fourth connecting plate 17 are used to transmit the displacement of the third sliding table 5 along the z-direction and limit the displacement of the third sliding table 5 in the y-direction, thereby achieving precise positioning and guidance of the third sliding table 5.

[0080] In this embodiment, the outer wall of the guide cylinder 15 is connected to the top wall of the gantry 2 via a steel wire rope. The steel wire rope is wound around the take-up roller, and both ends of the take-up roller are set on the gantry 2 via support seats. The take-up roller can achieve the winding of the steel wire rope through a torsion spring. When the equipment is processing, the first electromagnet 702 is de-energized and separates from the second groove 706. The second connecting rod assembly can be suspended by the steel wire rope through the guide cylinder 15 to prevent the second connecting rod assembly from falling.

[0081] When the second sliding table 4 moves along the y-direction, the third sliding table 5 moves synchronously. The third sliding table 5 can drive the connecting column 703 and the fixed cylinder 704 to move synchronously through the first electromagnet 702. The fixed cylinder 704 drives the guide column 14 to move along the guide cylinder 15 along the y-direction, limiting the displacement of the second sliding table 4 in the z-direction, thereby achieving precise positioning and guidance of the second sliding table 4.

[0082] like Figure 6-8 As shown, the walls of the placement plates 6 on both sides of the placement groove 21 are respectively provided with a first cavity 22 and a second cavity 25. The walls of the placement plates 6 at the bottom of the placement groove 21 are provided with a connecting groove 29 and a dust collection chamber 28. The dust collection chamber 28 and the placement groove 21 are connected through the connecting groove 29. The first cavity 22 and the second cavity 25 are both connected to the placement groove 21. The first chain drive mechanism is located in the first cavity 22, and the second chain drive mechanism is located in the second cavity 25.

[0083] The first chain drive mechanism includes a first driving wheel and a first driven wheel whose two ends are connected to the bearings on the inner wall of the first cavity 22. Each of the first driving wheel and the first driven wheel is provided with two sprockets. The sprockets on the first driving wheel and the first driven wheel are fitted with a meshing first chain 23. A first crossbar 24 is welded and fixed on the first chain 23.

[0084] The second chain drive mechanism includes a second driving wheel and a second driven wheel whose two ends are connected to the bearings on the inner wall of the second cavity 25. Both the second driving wheel and the second driven wheel are fitted with sprockets. The sprockets on the second driving wheel and the second driven wheel are fitted with meshing second chains 26. A second crossbar 27 is welded and fixed on the second chain 26. The two first chains 23 and the second chain 26 are staggered on the horizontal plane.

[0085] The two adjacent first crossbars 24 and second crossbars 27 can form a rectangular frame for placing workpieces. Since there are multiple first crossbars 24 and second crossbars 27, multiple workpieces can be placed in the placement slot 21 to achieve continuous feeding operation.

[0086] During operation, the workpiece is placed into the placement slot 21 and then fed into the connecting slot 29 by the first chain 23 transmission mechanism and the second chain 26 transmission mechanism. At this time, the waste generated during processing will fall into the vicinity of the connecting slot 29. A dust suction pipe is inserted into the wall of the placement plate 6 on one side of the dust collection chamber 28. One end of the dust suction pipe is connected to a dust suction fan. The dust can be sucked away through the connecting slot 29 and the dust collection chamber 28 for centralized treatment, ensuring the cleanliness of the CNC machine tool.

[0087] During loading, the first chain 23 rotates clockwise and the second chain 26 rotates counterclockwise, which allows the first crossbar 24 and the second crossbar 27 to move in the same direction, thus pushing the workpiece into the connecting groove 29. Then, the first chain 23 stops rotating and the second chain 26 rotates in the opposite direction. At this time, the second crossbar 27 can push the workpiece to fit against the first crossbar 24, so that the second crossbar 27 and the first crossbar 24 can clamp the workpiece.

[0088] Furthermore, to improve the clamping effect, anti-slip textures are provided on the outer walls of the second crossbar 27 and the first crossbar 24.

[0089] The positional design of the second chain 26 and the two first chains 23 ensures that the first crossbar 24 and the second crossbar 27 are not on the same horizontal plane, thus preventing the first crossbar 24 and the second crossbar 27 from colliding when moving.

[0090] like Figure 6 and Figure 9 As shown, a fixing sleeve 30 is fitted on both the first crossbar 24 and the second crossbar 27. The outer wall of the fixing sleeve 30 is provided with a long strip-shaped limiting groove 31. The cross-section of the limiting groove 31 is a right-angled "U" shape. The inner walls of the first cavity 22 and the second cavity 25 are both welded with limiting plates 32 that match the limiting groove 31. The limiting plates 32 are long strip-shaped.

[0091] Since the first chain 23 and the second chain 26 are flexible, in order to prevent the first crossbar 24 and the second crossbar 27 from shifting along their length direction during the clamping process, a limiting plate 32 is provided to limit the first crossbar 24 and the second crossbar 27, thereby further ensuring the clamping effect of the first crossbar 24 and the second crossbar 27.

[0092] The length of the limiting plate 32 is less than the center distance between the first chain 23 and the second chain 26. The center distance is the distance between the axes of the driving wheel and the driven wheel. Both the first chain 23 and the second chain 26 are "O" shaped. The chain between the driving wheel and the driven wheel is straight, and the chain on the sprocket is arc-shaped. When the first crossbar 24 and the second crossbar 27 move in a straight line with the chain, the fixing sleeve 30 will engage with the limiting plate 32. When the first crossbar 24 moves to the arc end of the chain, the fixing sleeve 30 will separate from the limiting plate 32 in advance to avoid the fixing sleeve 30 and the limiting plate 32 from jamming.

[0093] In the description of this specification, terms such as "connection," "installation," and "fixation" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms within this invention based on the specific circumstances.

[0094] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0095] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-precision gantry CNC machine tool, comprising a worktable (1) and a gantry frame (2) disposed on the worktable (1), characterized in that: The workbench (1) is provided with a first sliding table (3) that moves along the x direction, the gantry (2) is provided with a second sliding table (4) that moves along the y direction, and the second sliding table (4) is provided with a third sliding table (5) that moves along the z direction. The first sliding table (3) and the third sliding table (5) are both provided with connectors (7) on their sides. The first sliding table (3) is connected to a first link assembly through the connector (7). The third sliding table (5) is connected to a guide post (14) through the connector (7). The guide post (14) is slidably connected to a second link assembly. The first link assembly and the second link assembly are movably connected through a connecting rod (12). The connector (7) includes a mounting plate (701) and a first electromagnet (702) fixed on the mounting plate (701), and a connecting post (703) cooperating with the first electromagnet (702). The top surface of the connecting post (703) is provided with a first groove (705) and a second groove (706) from top to bottom. The bottom surface of the connecting post (703) extends axially to form a guide rod (707). A magnet is embedded in the bottom of the second groove (706). The end of the magnet and the first electromagnet (702) opposite to each other are opposite magnetic poles. The bottom end of the guide rod (707) extends into the fixed cylinder (704). When the first electromagnet (702) is energized, it is connected to the connecting post (703). When the power is off, it is separated from the connecting post (703). The first sliding table (3) is provided with a placement plate (6) for placing materials. The placement plate (6) has a long strip-shaped placement groove (21). The placement plate (6) is provided with a first chain drive mechanism and a second chain drive mechanism. The first chain drive mechanism and the second chain drive mechanism are respectively provided with a first crossbar (24) and a second crossbar (27) evenly distributed. One end of the first crossbar (24) and the second crossbar (27) extends into the placement groove (21) for conveying and clamping workpieces.

2. The high-precision gantry CNC machine tool according to claim 1, characterized in that: The mounting plate (701) is bolted to the side wall of the first sliding table (3) and the third sliding table (5), and the mounting plate (701) is symmetrically arranged about the first sliding table (3) and the third sliding table (5).

3. A high-precision gantry CNC machine tool according to claim 1, characterized in that: The first electromagnet (702), the connecting post (703), the first groove (705) and the second groove (706) are all coaxial and arranged vertically. The first groove (705) and the second groove (706) are both cylindrical grooves. The first electromagnet (702) is cylindrical in shape. The inner diameter of the first groove (705) is greater than the diameter of the first electromagnet (702), and the inner diameter of the second groove (706) is equal to the diameter of the first electromagnet (702).

4. A high-precision gantry CNC machine tool according to claim 1, characterized in that: The first connecting rod assembly includes a first connecting plate (10) and a second connecting plate (11). The two ends of the first connecting plate (10) are movably connected to the bearings of the first shaft (8) and the second shaft (9), and one end of the second connecting plate (11) is movably connected to the bearing of the first shaft (8).

5. A high-precision gantry CNC machine tool according to claim 4, characterized in that: The second connecting rod assembly includes a third connecting plate (16) and a fourth connecting plate (17). The two ends of the third connecting plate (16) are movably connected to the bearings of the guide cylinder (15) and the third shaft (18), and one end of the fourth connecting plate (17) is movably connected to the bearing of the third shaft (18).

6. A high-precision gantry CNC machine tool according to claim 5, characterized in that: The second connecting plate (11) and the fourth connecting plate (17) are movably connected to the connecting rod (12) bearing at opposite ends. The connecting rod (12) is U-shaped and is welded and fixed to the fixing plate (13). The bottom end of the fixing plate (13) is fixed perpendicularly to the surface of the workbench (1).

7. A high-precision gantry CNC machine tool according to claim 5, characterized in that: The inner wall of the guide cylinder (15) is uniformly provided with ball grooves (20), and spherical balls (19) are provided in the ball grooves (20). The balls (19) are in contact with the outer wall of the guide post (14). The outer wall of the guide cylinder (15) is provided with a countersunk hole. A second electromagnet (33) is fixed to the outer wall of the guide cylinder (15) by a bracket. A magnet column (34) passes through the countersunk hole. An arc-shaped limiting piece (35) is welded and fixed to the bottom end of the magnet column (34). The limiting piece (35) is embedded in the inner wall of the guide cylinder (15). The second electromagnet (33) has a corresponding magnetic pole at one end opposite to the magnet post (34). The longitudinal section of the second electromagnet (33) is T-shaped. The second electromagnet (33) is connected to the countersunk hole by a spring.

8. A high-precision gantry CNC machine tool according to claim 1, characterized in that: The walls of the placement plates (6) on both sides of the placement groove (21) are respectively provided with a first cavity (22) and a second cavity (25). The walls of the placement plates (6) at the bottom of the placement groove (21) are provided with a connecting groove (29) and a dust collection chamber (28). The dust collection chamber (28) and the placement groove (21) are connected through the connecting groove (29). The first cavity (22) and the second cavity (25) are both connected to the placement groove (21). The first chain drive mechanism is located in the first cavity (22), and the second chain drive mechanism is located in the second cavity (25).

9. A high-precision gantry CNC machine tool according to claim 8, characterized in that: The first chain drive mechanism includes a first driving wheel and a first driven wheel that are connected to the bearings on the inner wall of the first cavity (22) at both ends. Two sprockets are provided on the first driving wheel and the first driven wheel. The sprockets on the first driving wheel and the first driven wheel are fitted with a meshing first chain (23). A first crossbar (24) is welded and fixed on the first chain (23). The second chain drive mechanism includes a second driving wheel and a second driven wheel that are connected to the bearings on the inner wall of the second cavity (25) at both ends. A sprocket is fitted on both the second driving wheel and the second driven wheel. A second chain (26) meshes with the sprockets on the second driving wheel and the second driven wheel. A second crossbar (27) is welded and fixed on the second chain (26). The two first chains (23) and the second chain (26) are staggered on the horizontal plane.

10. A high-precision gantry CNC machine tool according to claim 9, characterized in that: The first crossbar (24) and the second crossbar (27) are both fitted with a fixing sleeve (30), and the outer wall of the fixing sleeve (30) is provided with a long strip-shaped limiting groove (31), and the cross section of the limiting groove (31) is a right-angled "U" shape. The inner walls of the first cavity (22) and the second cavity (25) are both welded with limiting plates (32) that match the limiting groove (31), and the limiting plates (32) are long strips.

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