High-precision machining gantry machine tool

Abstract

This invention relates to the field of gantry milling machine technology and discloses a high-precision machining gantry milling machine, including a machine tool base plate, on which a gantry frame is fixedly mounted. A high-precision machining head is mounted on the gantry frame. A square groove is formed at the lower end of the gantry frame, and a guide plate is slidably disposed within the square groove. An electrically powered moving plate is fixedly mounted on the guide plate. This high-precision machining gantry milling machine, by moving the high-precision machining head, drives the receiving gear to rotate, causing the rotating plate to move in the opposite direction. This allows for brushing the surface of the workpiece after machining to absorb waste debris, facilitating precision inspection of the workpiece. A first cleaning brush cleans the upper surface of the electrically powered moving plate, preventing waste debris from adhering to the plate and causing instability when placing subsequent workpieces. Furthermore, a negative pressure dust extraction fan collects and absorbs waste debris, and the exhaust air also provides auxiliary cooling for the high-precision machining head.

Description

Technical Field

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

[0002] A gantry milling machine is a large-scale workpiece processing equipment. It is named for its resemblance to the dragon gate in ancient landscape paintings. Because the worktable, stroke, and processing range of a gantry milling machine are larger than those of a general machining center, it can easily perform large-scale, complex, and multi-angle processing of parts. By adopting a CNC system, it realizes automated control of the processing process, improving production efficiency, accuracy, and consistency. Therefore, gantry milling machines are needed for workpiece processing in fields such as mold manufacturing, aerospace manufacturing, and railway vehicle manufacturing.

[0003] Currently, patent CN107433458A discloses a vertical gantry milling machine, including a bed and a worktable; the bed is horizontally placed; longitudinal guide rails are provided on the bed, and the worktable is placed on the longitudinal guide rails and can move along the longitudinal guide rails; it also includes columns provided on the left and right sides of the bed, and a crossbeam connecting the columns; the crossbeam can move up and down along vertical guide rails provided on the inner side of the columns; it also includes a spindle box, which is located in the middle of the crossbeam; after installation, the crossbeam has a hollow structure in the vertical direction and accommodates the spindle box. Transverse guide rails are provided on the hollow inner side and upper surface of the crossbeam, and sliders are provided on the spindle box housing corresponding to the transverse guide rails. The spindle box is engaged in the middle of the crossbeam and can move along the transverse guide rails. There are four longitudinal guide rails, and four transverse guide rails are located on the inner side of the crossbeam and two on the upper surface of the crossbeam. The vertical guide rails are guide rails composed of grooves and uprights, with the uprights passing through both ends of the crossbeam. By designing the machine tool crossbeam as a hollow structure and placing the machine tool spindle box in the middle of the crossbeam, the crossbeam is subjected to more uniform force and heat is more evenly distributed during machining, thereby reducing the stress deformation and thermal deformation of the crossbeam, improving machining accuracy, and extending the machine tool's lifespan.

[0004] However, the following problems still exist in the current use of gantry milling machines: The aforementioned device generates a significant amount of waste debris during workpiece processing. This debris adheres to the workpiece surface and the machine tool. During workpiece processing, it is usually necessary to inspect the workpiece to determine whether the processing is compliant. However, the attached debris affects the measurement accuracy, causing measurement errors. Furthermore, when placing the next workpiece for processing, the attached debris can lift the workpiece, causing the lower end of the workpiece to be placed unevenly, requiring workers to clean and remove the debris from the machine tool. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a high-precision gantry milling machine. By lifting the machine head and moving the cleaning brush up and down in conjunction with it, and then rotating the cleaning brush, the machine can collect the workpiece and the residual waste on the machine tool, which facilitates the measurement of the workpiece and avoids affecting the stable placement of the workpiece.

[0006] This invention provides the following technical solution: a high-precision machining gantry milling machine, comprising a machine tool base plate, on the upper surface of which a gantry frame is fixedly mounted, and a high-precision machining head is provided on the gantry frame. A square groove is provided at the lower end of the gantry frame, and a guide plate is slidably disposed within the square groove. An electrically powered movable plate is fixedly mounted on the guide plate. A fixed rack is fixedly mounted on the high-precision machining head, and the fixed rack meshes with a receiving gear. A fixed track is fixedly connected to the receiving gear, and a movable rack meshes with the side of the receiving gear. A rotating plate is fixedly mounted at the lower end of the movable rack. A first cleaning brush is fixedly installed on the lower surface. A drive gear is rotatably installed at the lower end of the fixed track. A second motor is installed at the lower end of the drive gear via a rotating shaft, and the second motor is fixedly installed on the fixed track. An auxiliary plate is fixedly installed at the front of the gantry, and a negative pressure vacuum fan is fixedly installed at the lower end of the auxiliary plate. There are two negative pressure vacuum fans, and the other negative pressure vacuum fan is fixedly installed on the gantry. An air duct is provided at the lower end of the negative pressure vacuum fan, and an adsorption component is fixedly installed at the lower end of the air duct. A flip plate is fixedly installed on the adsorption component, and a second cleaning brush is fixedly installed at the lower end of the flip plate.

[0007] Furthermore, a drive plate is fixedly installed at the lower right end of the energized moving plate, and a through threaded hole is opened in the middle of the drive plate. A rotating screw is connected to the drive plate through the threaded hole. A bearing plate is provided at the upper end of the machine tool base plate. The rotating screw and the machine tool base plate form a rotation mechanism through the bearing plate on the machine tool base plate. A first motor is provided on the machine tool base plate, and the output end of the first motor is connected to the rotating screw. With the above structure, the first motor can drive the rotating screw to rotate. By rotating the rotating screw, the position of the energized moving plate can be changed, thereby moving the position of the workpiece.

[0008] Furthermore, the energized movable plate is made of electromagnet material, and a limiting plate is adsorbed on the upper end of the energized movable plate. The limiting plate is made of iron and is an arc-shaped structure that facilitates the attachment and fixation of the workpiece. Through the above structure, the limiting plate can be adsorbed by the energized movable plate, and the workpiece can be clamped and fixed under the action of the limiting plate.

[0009] Furthermore, a limiting slider is fixedly installed on the movable rack, and the limiting slider is set as a smooth "T"-shaped plate structure. A "T"-shaped groove is opened on the fixed track, and the limiting slider is slidably connected to the fixed track through the "T"-shaped groove on the fixed track. With the above structure, the movable rack can be limited under the action of the limiting slider, that is, the rotation of the movable rack is not affected while supporting the movable rack.

[0010] Furthermore, the rotating plate is configured as a circular plate structure, and the outer surface of the rotating plate is provided with a gear tooth structure. The rotating plate is meshed with the driving gear through the gear tooth structure. A bearing is provided at the lower end of the fixed track, and the driving gear is rotatably connected to the fixed track through the bearing. With the above structure, it is convenient to drive the rotating plate to move by the rotation of the driving gear.

[0011] Furthermore, the negative pressure dust collector has an air outlet hole on its side, and the air guide pipe at the lower end of the negative pressure dust collector is made of PVC flexible hose. With the above structure, it is convenient for the air generated by the negative pressure dust collector to adhere and cool the processing head.

[0012] Furthermore, two square grooves are symmetrically provided at the lower end of the rotating plate, and a fixed rotating shaft is fixedly installed in the square grooves at the lower end of the rotating plate. A spiral spring is fixedly installed on the outer surface of the fixed rotating shaft, and the other end of the spiral spring is fixedly installed on the flip plate. A cylindrical groove is provided on the side of the flip plate, and the flip plate is disposed outside the fixed rotating shaft through the cylindrical groove. With the above structure, the flip plate can be driven to rotate by the deformation and recovery of the spiral spring.

[0013] Furthermore, a sliding groove is provided at the upper end of the rotating plate, and a sliding rod is fixedly installed at the lower end of the moving rack. The sliding rod is slidably connected to the rotating plate through the sliding groove. With the above structure, the rotating plate can be supported and limited by the sliding rod.

[0014] Furthermore, a mounting plate is fixedly installed on the gantry frame, and the mounting plate has spiral holes. The mounting plate is connected to fastening screws through the spiral holes. The fastening screws are installed through the fixed rail. The rear side of the fixed rail is in close contact with the gantry frame, and both ends of the upper rear side of the fixed rail are in close contact with the mounting plate. With the above structure, it is convenient to install and fix the mounting plate and the fixed rail with fastening screws.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This high-precision gantry milling machine, through the up-and-down movement of the high-precision machining head, drives the receiving gear to rotate, thereby causing the rotating plate to move in the opposite direction. This allows for brushing of the workpiece surface after processing to remove waste debris, facilitating precise workpiece inspection. Furthermore, a first cleaning brush cleans the upper surface of the energized moving plate, preventing waste debris from adhering to it and causing instability in subsequent workpiece placement. A negative pressure dust extraction fan collects and removes waste debris, and the exhaust air also assists in cooling the high-precision machining head, accelerating its heat dissipation and allowing for faster subsequent processing operations. This prevents the high-precision machining head from overheating and affecting its accuracy due to prolonged continuous operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the gantry frame of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the high-precision machining head of the present invention; Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of the rotating screw of the present invention; Figure 4 This is a three-dimensional structural diagram of the negative pressure dust extraction fan of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the flip plate of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the receiving gear of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the rotating plate of the present invention; Figure 8 This is a schematic diagram of the three-dimensional cross-sectional structure of the fixed rotating shaft of the present invention; Figure 9 This is a schematic diagram of the three-dimensional exploded structure of the adsorption component of the present invention; Figure 10 This is a schematic diagram of the three-dimensional structure of the movable rack of the present invention.

[0017] In the diagram: 1. Machine tool base plate; 2. Gantry frame; 3. High-precision machining head; 4. Guide plate; 5. Powered moving plate; 6. Drive plate; 7. Rotating screw; 8. First motor; 9. Limiting plate; 10. Fixed rack; 11. Receiving gear; 12. Fixed track; 13. Limiting slider; 14. Moving rack; 15. Rotating plate; 16. First cleaning brush; 17. Drive gear; 18. Second motor; 19. Mounting plate; 20. Negative pressure dust collector; 21. Air duct; 22. Adsorption assembly; 23. Tilting plate; 24. Second cleaning brush; 25. Scroll spring; 26. Fixed shaft; 27. Sliding rod; 28. Sliding groove; 29. ​​Mounting plate; 30. Fastening screw. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Please see Figures 1-10 This invention provides a technical solution: a high-precision machining gantry machine tool, including a machine tool base plate 1, on which a gantry frame 2 is fixedly mounted, and a high-precision machining head 3 is provided on the gantry frame 2. A square groove is opened at the lower end of the gantry frame 2, and a guide plate 4 is slidably arranged in the square groove at the lower end of the gantry frame 2. An electrically conductive moving plate 5 is fixedly mounted on the guide plate 4. The electrically conductive moving plate 5 is made of electromagnet material, and a limiting plate 9 is adsorbed on the upper end of the electrically conductive moving plate 5. The limiting plate 9 is made of iron and is an arc-shaped structure that facilitates the contact and fixation of the workpiece. An mounting plate 29 is fixedly mounted on the gantry frame 2, and a spiral hole is opened on the mounting plate 29. The mounting plate 29 is connected to the fastening screw 30 through the spiral hole. The fastening screw 30 is inserted through the fixed rail 12. The rear side of the fixed rail 12 is tightly fitted with the gantry frame 2, and both ends of the upper rear side of the fixed rail 12 are tightly fitted with the mounting plate 29.

[0020] When it is necessary to fix the workpiece, place the workpiece on the energized moving plate 5, and then place the limiting plate 9 on the energized moving plate 5. Move the position of the limiting plate 9 so that it fits tightly against the side of the workpiece. Then, energize the energized moving plate 5. Because the energized moving plate 5 is equipped with an electromagnet, it becomes magnetic as it is energized, thus attracting and fixing the iron limiting plate 9 (the limiting plate 9 can be made of a material that can be attracted by a magnet). As the limiting plate 9 is attracted and fixed, the position of the workpiece is fixed. Then, start the first motor 8. Because the output end of the first motor 8 is connected to the rotating screw 7, the rotating screw 7 begins to rotate. Since the rotating screw 7 is threadedly connected to the driving plate 6, as the rotating screw 7 rotates, the driving plate 6 begins to move the energized moving plate 5 connected to it. The guide plate 4 is fixedly installed at the lower end of the energized moving plate 5. At this time, the guide plate 4 begins to slide in the groove opened at the lower end of the gantry 2, so as to achieve the purpose of smooth conveying of the workpiece until the workpiece is conveyed to the lower end of the high-precision machining head 3 (the high-precision machining head 3 is the same as the fine machining head of the existing gantry machine tool, and its working principle and moving principle are the same as the existing ones). At this time, the workpiece can be processed by the high-precision machining head 3. If it is necessary to inspect the workpiece during the processing and continue processing, the fixed rail 12 is moved closer to the gantry 2 until the rear side of the fixed rail 12 is tightly attached to the gantry 2. Then, the fastening screw 30 passes through the side of the fixed rail 12 until the fastening screw 30 is connected to the spiral hole opened on the mounting plate 29. At this time, the fixed rail 12 can be fixedly installed on the gantry 2 for subsequent use.

[0021] A fixed rack 10 is fixedly installed on the high-precision machining head 3. The fixed rack 10 meshes with the receiving gear 11, and a fixed rail 12 is fixedly connected to the receiving gear 11. A movable rack 14 is meshed with the side of the receiving gear 11, and a rotating plate 15 is fixedly installed at the lower end of the movable rack 14. A first cleaning brush 16 is fixedly installed on the lower surface of the rotating plate 15. A drive plate 6 is fixedly installed at the lower right end of the energized movable plate 5, and a through threaded hole is opened in the middle of the drive plate 6. A rotating screw 7 is connected to the drive plate 6 through the threaded hole. A bearing plate is provided on the upper end of the machine tool base plate 1. The rotating screw 7 forms a rotation mechanism with the machine tool base plate 1 through the bearing plate provided on the machine tool base plate 1. A first motor 8 is provided on the machine tool base plate 1. The first motor 8 outputs... The output end is connected to the rotating screw 7. A limit slider 13 is fixedly installed on the moving rack 14. The limit slider 13 is set as a smooth "T"-shaped plate structure. A "T"-shaped groove is opened on the fixed track 12. The limit slider 13 is slidably connected to the fixed track 12 through the "T"-shaped groove. Two square grooves are symmetrically opened at the lower end of the rotating plate 15. A fixed rotating shaft 26 is fixedly installed in the square groove at the lower end of the rotating plate 15. A spiral spring 25 is fixedly installed on the outer surface of the fixed rotating shaft 26. The other end of the spiral spring 25 is fixedly installed on the flip plate 23. A cylindrical groove is opened on the side of the flip plate 23. The flip plate 23 is installed through the cylindrical groove outside the fixed rotating shaft 26.

[0022] When the workpiece needs to be inspected after processing, the high-precision machining head 3 begins to rise (the high-precision machining head 3 is controlled by an internal lifting structure, which is consistent with existing gantry milling machines). Because a fixed rack 10 is fixedly installed on the high-precision machining head 3, the fixed rack 10 begins to move upwards. Since the fixed rack 10 meshes with the receiving gear 11, the receiving gear 11 begins to rotate. Furthermore, since the receiving gear 11 meshes with the moving rack 14, the moving rack 14 begins to rotate. That is, the moving rack 14 begins to move downwards under the action of the limiting slider 13 (the limiting slider 13 begins to move downwards through the "T"-shaped groove on the fixed track 12). (Inner sliding), because the lower end of the moving rack 14 is fixedly installed with a rotating plate 15, the rotating plate 15 also begins to move downward. As the rotating plate 15 moves downward, the flipping plate 23 also begins to move downward until the flipping plate 23 is no longer in contact with the high-precision machining head 3. At this time, the flipping plate 23 is no longer under force. As the spiral spring 25 returns to its deformation (the flipping plate 23 is under force and the spiral spring 25 is in a compressed deformation state), the spiral spring 25 begins to drive the flipping plate 23 to rotate around the fixed rotating shaft 26. That is, the flipping plate 23 begins to rotate to a horizontal state. As the flipping plate 23 moves downward, the second cleaning brush 24 installed at the lower end of the flipping plate 23 begins to fit tightly with the upper end of the workpiece.

[0023] A drive gear 17 is rotatably mounted on the lower end of the fixed track 12. A second motor 18 is mounted on the lower end of the drive gear 17 via a rotating shaft, and the second motor 18 is fixedly mounted on the fixed track 12. A flip plate 23 is fixedly mounted on the adsorption assembly 22, and a second cleaning brush 24 is fixedly mounted on the lower end of the flip plate 23. An auxiliary plate 19 is fixedly mounted on the front side of the gantry frame 2, and a negative pressure vacuum cleaner 20 is fixedly mounted on the lower end of the auxiliary plate 19. There are two negative pressure vacuum cleaners 20, and the other negative pressure vacuum cleaner 20 is fixedly mounted on the gantry frame 2. An air duct 21 is provided at the lower end of the negative pressure vacuum cleaner 20, and a suction device is fixedly mounted on the lower end of the air duct 21. The auxiliary component 22 includes a rotating plate 15 with a circular plate structure and a toothed structure on its outer surface. The rotating plate 15 is meshed with the drive gear 17 through the toothed structure. A bearing is provided at the lower end of the fixed track 12, and the drive gear 17 is rotatably connected to the fixed track 12 through the bearing. The negative pressure vacuum fan 20 has an air outlet hole on its side, and the air guide pipe 21 at the lower end of the negative pressure vacuum fan 20 is made of PVC hose. A sliding groove 28 is provided at the upper end of the rotating plate 15, and a sliding rod 27 is fixedly installed at the lower end of the moving rack 14. The sliding rod 27 is slidably connected to the rotating plate 15 through the sliding groove 28.

[0024] When cleaning of the upper part of the workpiece is required, the second motor 18 (a servo motor capable of driving the second motor 18 to rotate in both directions) is activated. Since the output of the second motor 18 is connected to the drive gear 17 via a rotating shaft, the drive gear 17 begins to rotate. Because the drive gear 17 meshes with the rotating plate 15, the rotating plate 15 begins to rotate (it rotates 180 degrees and then reverses). Since the rotating plate 15 has a sliding groove 28, the sliding rod 27 begins to slide along the sliding groove 28. As the rotating plate 15 rotates, the second cleaning brush 24 installed at the lower end of the flip plate 23 begins to brush and clean the upper part of the workpiece. Simultaneously, the negative pressure dust collector 20 starts to operate. The air duct 21 and the adsorption assembly 22 begin to adsorb the loosened debris after brushing, preventing it from adhering to the workpiece surface and affecting the accuracy of workpiece inspection. During the adsorption process, the generated... Airflow can assist in cooling the high-precision machining head 3. When the inspection is completed, the power-on moving plate 5 is de-energized, and the limit plate 9 and the workpiece can be removed. Then, the second motor 18 starts working, and the first cleaning brush 16 set at the lower end of the rotating plate 15 also starts to rotate. The first cleaning brush 16 can clean the waste attached to the power-on moving plate 5, avoiding the instability of the subsequent workpiece placement due to waste. After the processing is completed, the high-precision machining head 3 moves downward (in preparation for the next processing). At this time, the receiving gear 11 starts to rotate, that is, the moving rack 14 moves upward, that is, the rotating plate 15 also starts to move upward. At this time, the flipping plate 23 begins to fit against the lower end of the high-precision machining head 3, that is, the flipping plate 23 begins to be squeezed, that is, the flipping plate 23 begins to rotate around the fixed rotating shaft 26, and the spiral spring 25 begins to be squeezed and deformed, thereby avoiding the impact on the processing process when processing the workpiece.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision machining gantry milling machine, comprising a machine tool base plate (1), on which a gantry frame (2) is fixedly mounted, and a high-precision machining head (3) is provided on the gantry frame (2), characterized in that, Also includes: A square groove is provided at the lower end of the gantry frame (2), and a guide plate (4) is slidably arranged in the square groove at the lower end of the gantry frame (2). An electrically powered moving plate (5) is fixedly installed on the guide plate (4). A fixed rack (10) is fixedly installed on the high-precision machining head (3). The fixed rack (10) meshes with the receiving gear (11), and a fixed rail (12) is fixedly connected to the receiving gear (11). A moving rack (14) is meshed with the side of the receiving gear (11), and a rotating plate (15) is fixedly installed at the lower end of the moving rack (14). A first cleaning brush (16) is fixedly installed on the lower surface of the rotating plate (15). A drive gear (17) is rotatably installed at the lower end of the fixed rail (12). A second motor (18) is installed at the lower end of the wheel (17) via a rotating shaft, and the second motor (18) is fixedly installed on the fixed track (12). An additional plate (19) is fixedly installed at the front side of the gantry (2), and a negative pressure vacuum cleaner (20) is fixedly installed at the lower end of the additional plate (19). There are two negative pressure vacuum cleaners (20), and the other negative pressure vacuum cleaner (20) is fixedly installed on the gantry (2). An air duct (21) is connected to the lower end of the negative pressure vacuum cleaner (20), and an adsorption component (22) is fixedly installed at the lower end of the air duct (21). A flip plate (23) is fixedly installed on the adsorption component (22), and a second cleaning brush (24) is fixedly installed at the lower end of the flip plate (23).

2. The high-precision machining gantry milling machine tool according to claim 1, characterized in that: The lower right end of the energized moving plate (5) is fixedly installed with a drive plate (6), and a through threaded hole is opened in the middle of the drive plate (6). The drive plate (6) is connected to a rotating screw (7) through the threaded hole. A bearing plate is provided on the upper end of the machine tool base plate (1). The rotating screw (7) forms a rotating mechanism with the machine tool base plate (1) through the bearing plate provided on the machine tool base plate (1). A first motor (8) is provided on the machine tool base plate (1). The output end of the first motor (8) is connected to the rotating screw (7).

3. The high-precision machining gantry milling machine tool according to claim 1, characterized in that: The energized moving plate (5) is made of electromagnet material, and a limiting plate (9) is adsorbed on the upper end of the energized moving plate (5). The limiting plate (9) is made of iron material and is an arc-shaped structure that facilitates the fitting and fixing of the workpiece.

4. The high-precision machining gantry milling machine tool according to claim 1, characterized in that: The movable rack (14) is fixedly installed with a limiting slider (13), and the limiting slider (13) is set as a smooth "T"-shaped plate structure. The fixed track (12) is provided with a "T"-shaped groove, and the limiting slider (13) is slidably connected to the fixed track (12) through the "T"-shaped groove on the fixed track (12).

5. A high-precision machining gantry milling machine according to claim 1, characterized in that: The rotating plate (15) is configured as a circular plate structure, and the outer surface of the rotating plate (15) is provided with a gear tooth structure. The rotating plate (15) is meshed with the drive gear (17) through the gear tooth structure. A bearing is provided at the lower end of the fixed track (12), and the drive gear (17) is rotatably connected with the fixed track (12) through the bearing.

6. A high-precision machining gantry milling machine according to claim 1, characterized in that: The negative pressure vacuum cleaner (20) has an air outlet hole on its side, and the air guide pipe (21) at the lower end of the negative pressure vacuum cleaner (20) is made of PVC hose.

7. A high-precision machining gantry milling machine according to claim 1, characterized in that: The rotating plate (15) has two square grooves symmetrically opened at the lower end, and a fixed rotating shaft (26) is fixedly installed in the square groove at the lower end of the rotating plate (15). A spiral spring (25) is fixedly installed on the outer surface of the fixed rotating shaft (26), and the other end of the spiral spring (25) is fixedly installed on the flip plate (23). A cylindrical groove is opened on the side of the flip plate (23), and the flip plate (23) is installed outside the fixed rotating shaft (26) through the cylindrical groove.

8. A high-precision machining gantry milling machine according to claim 1, characterized in that: The upper end of the rotating plate (15) is provided with a sliding groove (28), and the lower end of the moving rack (14) is fixedly installed with a sliding rod (27), and the sliding rod (27) is slidably connected to the rotating plate (15) through the sliding groove (28).

9. A high-precision machining gantry milling machine according to claim 1, characterized in that: The gantry (2) is fixedly provided with an installation plate (29), and the installation plate (29) is provided with a spiral hole. The installation plate (29) is connected to the fastening screw (30) through the spiral hole. The fastening screw (30) is installed through the fixed track (12). The rear side of the fixed track (12) is closely fitted with the gantry (2), and both ends of the upper rear side of the fixed track (12) are closely fitted with the installation plate (29).

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