A High-Stability Five-Axis Machine Tool Guide Rail System

Abstract

This invention specifically relates to a highly stable five-axis machine tool slide rail system, including a horizontal feed mechanism and a longitudinal feed mechanism. The longitudinal feed mechanism is slidably connected to the horizontal feed mechanism. The horizontal feed mechanism includes a sliding base and a connecting support ridge. The sliding base includes a pair of downwardly protruding bottom plates, and a first slider connection hole is provided on the side of the bottom plate. The connecting support ridge is located above the sliding base and has a top slide rail groove and a side slide rail groove. The longitudinal feed mechanism has a top connecting arm and a vertical connecting arm corresponding to the top slide rail groove and the side slide rail groove, respectively. A drive connecting plate is provided at the angle between the top connecting arm and the vertical connecting arm. The top slide rail groove and the side slide rail groove are connected by a screw-mounted inclined plate. By setting a slide rail system that shortens the lever arm and utilizes wind resistance, some unnecessary vibrations and jitters generated by the spindle during operation are eliminated, ensuring the accuracy of the machine tool operation, ensuring the quality of the finished product, and improving production efficiency.

Description

Technical Field

[0001] This invention relates to the field of machine tool equipment technology, and specifically to a highly stable five-axis machine tool slide rail system. Background Technology

[0002] Machine tools are indispensable basic equipment in modern industrial production, widely used in automobile manufacturing. With the rapid development of the manufacturing industry, the machine tool industry has also ushered in new development opportunities. CNC machine tools, due to their high precision, are in ever-increasing demand. As a major global market for machine tool consumption and production, China ranks among the world's top in both machine tool industry output and consumption.

[0003] The stability of a machine tool spindle has a crucial impact on machining accuracy and surface quality. In recent years, with the widespread application of CNC machine tools, spindle accuracy and stability have become key factors in improving machining quality. The radial rotation error of the spindle is one of the important factors affecting its accuracy and stability. Testing and vibration mode studies of the spindle can be used for prediction and compensation in machine tool machining, thereby improving the machining accuracy and surface quality of parts.

[0004] In terms of technological advancements, scholars both domestically and internationally have conducted extensive research on modal simulation calculation methods and rotational error testing methods for machine tool spindles. For example, modal analysis has been used to obtain the natural frequencies of electric spindles, providing an analytical basis for the structural design of high-speed electric spindles and the determination of optimal bearing preload. Furthermore, the spindle-housing vibration transmission mechanical model established based on Hertz theory and least squares method, as well as the simplification and determination of certain parameters of electric spindles using the multibody transfer matrix method, are all important technical means to improve spindle stability.

[0005] In practical applications, spindle stability issues can be analyzed and resolved in various ways. In machining, vibration is usually caused by the vibration of the mechanical system. To reduce vibration, the following measures can be taken:

[0006] Use a sharp blade: A sharp blade can reduce cutting force and vibration.

[0007] Choose an appropriate tool tip radius: the smaller the tool tip radius, the smaller the radial cutting force, which helps to reduce vibration.

[0008] Optimize cutting parameters: Reduce vibration by adjusting cutting speed, feed rate, and depth of cut.

[0009] Increase system rigidity: Increasing the rigidity of mechanical components can reduce vibration.

[0010] Damping technology: Damping can absorb vibration energy and reduce vibration propagation.

[0011] Sliding mode control: The sliding mode control method can effectively suppress jitter, especially in robot control.

[0012] In summary, the research and analysis of machine tool spindle stability is a multifaceted process involving modal analysis. It can effectively improve the stability of machine tool spindles, thereby enhancing the overall machining performance and accuracy of the machine tool.

[0013] Patent application CN201310616924.X discloses a five-axis machining center, comprising a base, a slide table, and a workpiece table. The base includes a body, with three first slide rails arranged laterally and parallel to each other on the rear side of the body. The slide table is slidably mounted on the first slide rails. A groove is provided on the front side of the body, and the workpiece table is disposed within the groove. Two screws are arranged parallel to each other within the groove of the body. The workpiece table has threaded holes through which the screws engage, allowing adjustment of the workpiece table's position within the groove. The workpiece table also includes two corresponding sidewalls, with a machining table between the two sidewalls. A disc-shaped workpiece table is located in the middle of the machining table, and the upper surface of the workpiece table has multiple radially extending inverted T-shaped grooves. Thus, this invention enables multi-axis machining, improving machining efficiency. However, this technical solution still addresses the problem of spindle vibration affecting the quality of machined products. Summary of the Invention

[0014] This invention provides a highly stable five-axis machine tool slide rail system. Through the combined action of a vertical base, side pull plates, mounting wings, and a transverse connecting ridge, it is stably connected to the spindle housing. A stabilizing pull rod is installed on the side pull plate, which exerts an upward pulling force on the side pull plate. This balances and reduces the vibration generated by the rotation and material cutting of the part of the spindle protruding from the spindle seat during operation, ensuring the production accuracy of the spindle, improving product quality, effectively reducing the defect rate, and improving economic benefits.

[0015] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a highly stable five-axis machine tool slide rail system, comprising a horizontal feed mechanism and a longitudinal feed mechanism, wherein the longitudinal feed mechanism is slidably connected to the horizontal feed mechanism, and the longitudinal feed mechanism is capable of relative motion toward or away from the workpiece on the x-axis; the horizontal feed mechanism is a transverse mechanical structure, comprising a sliding base and a connecting support ridge; the sliding base comprises a pair of downwardly protruding base plates, the side of the base plates being provided with a first slider connecting hole; the connecting support ridge is disposed above the sliding base, and the connecting support ridge is provided with a top slide rail groove and a side slide rail groove; the longitudinal feed mechanism is provided with a top connecting arm and a vertical connecting arm corresponding to the top slide rail groove and the side slide rail groove, respectively; a drive connecting plate is provided at the included angle between the top connecting arm and the vertical connecting arm.

[0016] The top slide rail groove and the side slide rail groove are connected by a lead screw mounting plate. The drive connecting plate is provided with a lead screw insertion hole corresponding to the lead screw. The vertical connecting arm has Z-axis side plates protruding outward on both sides. The Z-axis side plates are provided with a third slider connecting hole. The top connecting arm is provided with a spindle mounting bracket near the vertical connecting arm.

[0017] As a preferred embodiment of the present invention, the connecting support ridge includes a first vertical plate, a second vertical plate, a first inclined plate, a second inclined plate, and a top plate. The lateral slide rail groove is disposed on the first vertical plate, and the top slide rail groove is disposed on the top plate. The top plate and the first vertical plate are connected by the first inclined plate, and the top plate and the second vertical plate are connected by the second inclined plate. The ratio of the height of the first vertical plate to the height of the second vertical plate is equal to the ratio of the length of the second inclined plate to the length of the first inclined plate. The second vertical plate is connected outward to a pair of back-side balance members, and the pair of back-side balance members are symmetrically disposed on the left and right sides of the second vertical plate.

[0018] As a preferred embodiment of the present invention, the back-side balance component is provided with an air-storing blind hole recessed inward on its side, and the opening of the air-storing blind hole is provided with an anti-overflow ring that converges towards the center to prevent a small amount of air from escaping.

[0019] As a preferred embodiment of the technical solution of the present invention, the back-side balancing component is provided with a balancing air inlet and a balancing air outlet on the other side of the air storage blind hole, and a bidirectional air duct is formed between the balancing air inlet and the balancing air outlet.

[0020] As a preferred embodiment of the present invention, the sliding base is recessed upwards and provided with a trapezoidal air passage groove, and the top of the air passage groove is provided with a pair of damping ribs protruding downwards. The midpoint of the distance between the pair of damping ribs is on the same vertical line as the center of gravity of the horizontal feed mechanism and the longitudinal feed mechanism as a whole.

[0021] As a preferred embodiment of the present invention, the sliding base is provided with first drag-reducing holes on both sides of the air passage, and the back-side balance member is provided with second drag-reducing holes corresponding to the first drag-reducing holes. The first drag-reducing holes and the second drag-reducing holes are coaxially arranged and connected to form a drag-reducing air passage.

[0022] As a preferred embodiment of the present invention, the highest height of the first drag-reducing hole and the second drag-reducing hole is lower than the lowest height of the longitudinal feeding mechanism.

[0023] As a preferred embodiment of the present invention, the sliding base is further provided with an oblique pressurization hole, which is connected to the drag-reducing air duct.

[0024] As a preferred embodiment of the present invention, the Z-axis side plate is provided with a first through hole and a second through hole near the third slider connecting hole, close to the top connecting arm and the vertical connecting arm, respectively. The ratio of the diameter of the first through hole to the diameter of the second through hole is equal to the inverse ratio of the shortest distance from the axis of the lead screw to the top slide rail groove to the shortest distance from the axis of the lead screw to the lateral slide rail groove.

[0025] As a preferred embodiment of the present invention, the connection between the first vertical plate and the sliding base is provided with an outwardly extending side wing, and the side wing is provided with a second lead screw hole.

[0026] In summary, the present invention has the following beneficial effects.

[0027] 1. By setting up a shortened lever arm and a slide rail system that utilizes wind resistance, some unnecessary vibrations and jitters generated by the spindle during operation are eliminated, ensuring the accuracy of machine tool operation, guaranteeing the quality of finished products, and improving production efficiency.

[0028] 2. The design incorporates a horizontal feed mechanism and a longitudinal feed mechanism. The horizontal feed mechanism consists of a sliding base and a connecting support ridge. The sliding base connects to the machine tool table to achieve feed in the y-axis direction, while the connecting support ridge slides to the sliding base to achieve feed in the x-axis direction. However, unlike traditional methods, this technical solution shortens the feed amount in the x-axis direction. Furthermore, the ratio of the height of the first vertical plate to the height of the second vertical plate is set to be equal to the ratio of the length of the second inclined plate to the length of the first inclined plate. The second vertical plate is connected outward to a pair of back-side balancers, which are symmetrically positioned on the left and right sides of the second vertical plate. This specific proportional relationship shortens the lever arm and improves stability.

[0029] 3. By setting an inclined pressure hole on the sliding base that connects to the drag-reducing air duct, part of the air in the drag-reducing air duct rushes out from the inclined pressure hole and flows to the worktable connected to the base (not shown in the attached figure). Since the boring tool moves towards the workpiece during forward motion on the y-axis and has not actually started working, drag reduction is achieved through the first drag reduction hole, the second drag reduction hole, and the drag-reducing air duct to reduce energy consumption. However, when the spindle boring tool is working, vibration and jitter will inevitably occur due to the rotation of the spindle. Lowering the center of gravity is one of the solutions to eliminate some vibration and jitter. By having part of the air rush out from the inclined pressure hole and act on the connection between the damping rib and the worktable, the center of gravity is lowered, and the damping between the damping rib and the worktable is strengthened, thereby achieving the effect of eliminating some vibration and jitter. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a front view of a high-stability five-axis machine tool slide rail system according to the present invention.

[0032] Figure 2 This is a three-dimensional structural diagram of a high-stability five-axis machine tool slide rail system according to the present invention.

[0033] Figure 3 This is a left view of a high-stability five-axis machine tool slide rail system according to the present invention.

[0034] Figure 4 This is a right view of a high-stability five-axis machine tool slide rail system according to the present invention.

[0035] Figure 5 This is a rear view of a high-stability five-axis machine tool slide rail system according to the present invention.

[0036] Figure 6 This invention relates to a highly stable five-axis machine tool slide rail system. Figure 5 Cross-sectional view at point AA.

[0037] Figure 7 This is a top view of a high-stability five-axis machine tool slide rail system according to the present invention.

[0038] Figure 8 This is a bottom view of a high-stability five-axis machine tool slide rail system according to the present invention.

[0039] Figure 9 This invention relates to a highly stable five-axis machine tool slide rail system. Figure 8 Cross-sectional view at point BB.

[0040] Figure 10 This is a perspective view of a highly stable five-axis machine tool slide rail system according to the present invention.

[0041] in:

[0042] 1. Horizontal feed mechanism; 2. Longitudinal feed mechanism; 3. Sliding base; 4. Connecting support ridge; 5. Base plate; 6. First slider connecting hole; 7. Top slide rail groove; 8. Lateral slide rail groove; 9. Top connecting arm; 10. Vertical connecting arm; 11. Drive connecting plate; 12. Lead screw; 13. Lead screw mounting inclined plate; 14. Lead screw insertion hole; 15. Z-axis side plate; 16. Third slider connecting hole; 17. Spindle mounting bracket; 18. First vertical plate; 19. Second vertical plate; 20. First inclined plate. 21. Second inclined plate; 22. Top plate; 23. Backside balance component; 24. Air storage blind hole; 25. Anti-overflow ring; 26. Balance air inlet hole; 27. Balance air outlet hole; 28. Bidirectional air duct; 29. ​​Air passage groove; 30. Damping rib; 31. First drag reduction hole; 32. Second drag reduction hole; 33. Drag reduction air duct; 34. Inclined pressurization hole; 35. First through hole; 36. Second through hole; 37. Side wing; 38. Second lead screw hole; 39. Reinforced pressurization hole; 40. Reinforced side pressure air duct. Detailed Implementation

[0043] The technical solutions in the embodiments of the present invention will be clearly explained below with reference to the accompanying drawings:

[0044] See attached document Figure 1 To be continued Figure 10 As shown, in machining, vibration is usually caused by the vibration of the mechanical system. The reasons why a five-axis machine tool may generate additional vibration during operation include:

[0045] Mechanical component problems: Wear or damage to mechanical components, such as worn bearings, may cause the spindle head to vibrate, resulting in shaking.

[0046] Insufficient rigidity of the tooling system: Insufficient rigidity of the tooling system, especially during cantilever machining, can cause the tool to bend or vibrate, resulting in ripples on the machined surface.

[0047] Insufficient rigidity of machine tools: Insufficient rigidity of certain components of the machine tool, such as spindle bearings and guide rails, may cause vibration under cutting forces.

[0048] Servo system response: Servo system response delay or improper gain settings may cause machine tool vibration during high-speed movement.

[0049] Unstable workpiece clamping: Unstable workpiece clamping or insufficient support may cause the workpiece to vibrate during the cutting process.

[0050] Machine tool control system: Improper settings of the machine tool control system, such as when the RTCP tool length compensation function is enabled, may cause vibration due to the linkage of the coordinate axes.

[0051] Dynamic balance of machine tool spindle: If the dynamic balance of the spindle is not good, it will generate additional centrifugal force when rotating at high speed, resulting in vibration.

[0052] Machine tool geometric errors: Geometric errors of machine tools, such as the linkage error between linear and rotary axes, may cause unexpected vibrations during the machining process.

[0053] Connection between machine tool and cutting tool: Insufficient rigidity in the connection between the machine tool spindle and the cutting tool, such as improper fit between the tool holder and the spindle, may also lead to vibration.

[0054] To resolve the vibration issue, if we address the problem from the perspective of the machine tool's structure, we typically need to conduct a comprehensive inspection and adjustment of the machine tool.

[0055] In actual production work, engineers optimized the structural design of five-axis machine tools and proposed a highly stable five-axis machine tool slide rail system, including a horizontal feed mechanism 1 and a longitudinal feed mechanism 2. The longitudinal feed mechanism 2 is slidably connected to the horizontal feed mechanism 1 and can make relative movements toward or away from the workpiece on the x-axis. The horizontal feed mechanism 1 is a transverse mechanical structure, including a sliding base 3, a connecting support ridge 4, and a back-side force-dispersing component. The sliding base 3 includes a pair of downwardly protruding bottom plates 5. The side of the bottom plate 5 is provided with a first slider connection hole 6. The connecting support ridge 4 is located above the sliding base 3 and is provided with a top slide rail groove 7 and a side slide rail groove 8. The longitudinal feed mechanism 2 is provided with a top connecting arm 9 and a vertical connecting arm 10 corresponding to the top slide rail groove 7 and the side slide rail groove 8, respectively. A drive connecting plate 11 is provided at the angle between the top connecting arm 9 and the vertical connecting arm 10.

[0056] The top slide rail groove 7 and the side slide rail groove 8 are connected by a screw mounting plate 13. The drive connecting plate 11 is provided with a screw insertion hole 14 corresponding to the screw 12. The vertical connecting arm 10 has Z-axis side plates 15 protruding outward on both sides. The Z-axis side plates 15 are provided with a third slider connection hole 16. The top connecting arm 9 is provided with a spindle mounting bracket 17 near the vertical connecting arm 10.

[0057] The connecting support ridge 4 includes a first vertical plate 18, a second vertical plate 19, a first inclined plate 20, a second inclined plate 21, and a top plate 22. A lateral slide rail groove 8 is provided on the first vertical plate, and a top slide rail groove 7 is provided on the top plate 22. The top plate 22 and the first vertical plate 18 are connected by the first inclined plate 20, and the top plate 22 and the second vertical plate 19 are connected by the second inclined plate 21. The ratio of the height of the first vertical plate 18 to the height of the second vertical plate 19 is equal to the ratio of the length of the second inclined plate 21 to the length of the first inclined plate 20. The second vertical plate 19 is connected to a pair of back-side balance members 23, which are symmetrically arranged on the left and right sides of the second vertical plate 19.

[0058] The back-side balance component 23 has an inwardly recessed air storage blind hole 24, and the opening of the air storage blind hole 24 is provided with an anti-overflow ring 25 that converges towards the center to prevent a small amount of air from escaping.

[0059] On the other side of the air storage blind hole 24, the back-side balance component 23 is provided with a balance air inlet 26 and a balance air outlet 27. A bidirectional air duct 28 is formed between the balance air inlet 26 and the balance air outlet 27. The bidirectional air duct 28 generates a horizontal thrust towards the longitudinal feed mechanism 2 and a vertical downward pressure.

[0060] The sliding base 3 is recessed upward and has a trapezoidal air passage 29. The top of the air passage 29 protrudes downward and has a pair of damping ribs 30. The midpoint of the distance between the pair of damping ribs 30 is on the same vertical line as the center of gravity of the horizontal feed mechanism 1 and the longitudinal feed mechanism 2.

[0061] The sliding base 3 has first drag reduction holes 31 on both sides of the air passage 29, and the back side balance member 23 has second drag reduction holes 32 corresponding to the first drag reduction holes 31. The first drag reduction holes 31 and the second drag reduction holes 32 are coaxially arranged, and the first drag reduction holes 31 and the second drag reduction holes 32 are connected to form a drag reduction air passage 33.

[0062] The highest height of the first drag-reducing hole 31 and the second drag-reducing hole 32 is lower than the lowest height of the longitudinal feed mechanism 2.

[0063] The sliding base 3 is also provided with an inclined pressure hole 34, which is connected to the drag-reducing air duct 33. Part of the air in the drag-reducing air duct 33 is rushed out from the inclined pressure hole 34 and flows to the worktable connected to the base. It is not shown in the attached figure. When the boring tool moves towards the workpiece during the forward motion on the y-axis, it has not actually started working. Therefore, in order to save energy, the first drag-reducing hole 31, the second drag-reducing hole 32 and the drag-reducing air duct 33 are used to reduce drag. However, when the spindle boring tool is working, the spindle rotation will inevitably produce vibration. Lowering the center of gravity is also one of the solutions to eliminate some vibration. By having part of the air rush out from the inclined pressure hole 34, it acts on the connection between the damping rib 30 and the worktable, which lowers the center of gravity and strengthens the damping between the damping rib 30 and the worktable, thereby achieving the effect of eliminating some vibration.

[0064] Furthermore, a reinforced pressurizing hole 39 is provided below the inclined pressurizing hole 34. The reinforced pressurizing hole 39 and the nearby structure form a reinforced side pressure air duct 40 with front and rear windproof arms. In the direction of movement, the air flows in from the front reinforced pressurizing hole 39 and rushes out from the rear reinforced pressurizing hole 39, flowing towards the worktable connected to the base, thereby strengthening the damping between the damping rib 30 and the worktable, thus achieving the effect of eliminating some vibration and shaking.

[0065] The Z-axis side plate 15 has a first through hole 35 and a second through hole 36 near the top connecting arm 9 and the vertical connecting arm 10, respectively, in the third slider connecting hole 16. The ratio of the diameter of the first through hole 35 to the diameter of the second through hole 36 is equal to the inverse ratio of the shortest distance from the axis of the lead screw 12 to the top slide rail groove 7 to the shortest distance from the axis of the lead screw 12 to the lateral slide rail groove 8.

[0066] The first vertical plate 18 is provided with an outwardly extending side wing 37 at the connection between it and the sliding base 3, and the side wing 37 is provided with a second lead screw hole 38.

[0067] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0068] In the description of this invention, it should be understood that the terms "front" and "back" are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of the invention.

[0069] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0070] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A highly stable five-axis machine tool slide rail system, characterized in that, The system includes a horizontal feed mechanism (1) and a longitudinal feed mechanism (2). The longitudinal feed mechanism (2) is slidably connected to the horizontal feed mechanism (1) and can move relative to the workpiece or away from it on the x-axis. The horizontal feed mechanism (1) is a transverse mechanical structure. The horizontal feed mechanism (1) includes a sliding base (3) and a connecting support ridge (4). The sliding base (3) includes a pair of bottom plates (5) protruding downwards. The bottom plates (5) have a first slider connecting hole (6) on their side. The connecting support ridge (4) is located above the sliding base (3) and has a top slide rail groove (7) and a side slide rail groove (8). The longitudinal feed mechanism (2) has a top connecting arm (9) and a vertical connecting arm (10) corresponding to the top slide rail groove (7) and the side slide rail groove (8), respectively. A drive connecting plate (11) is provided at the angle between the top connecting arm (9) and the vertical connecting arm (10). The top slide rail groove (7) and the side slide rail groove (8) are connected by a screw mounting inclined plate (13). The drive connecting plate (11) is provided with a screw insertion hole (14) corresponding to the screw (12). The vertical connecting arm (10) has Z-axis side plates (15) protruding outward on both sides. The Z-axis side plates (15) are provided with a third slider connection hole (16). The top connecting arm (9) is provided with a spindle mounting bracket (17) near the vertical connecting arm (10). The connecting support ridge (4) includes a first vertical plate (18), a second vertical plate (19), a first inclined plate (20), a second inclined plate (21), and a top plate (22). The lateral slide rail groove (8) is provided on the first vertical plate (18), and the top slide rail groove (7) is provided on the top plate (22). The top plate (22) and the first vertical plate (18) are connected by the first inclined plate (20), and the top plate (22) and the second vertical plate (19) are connected by the second inclined plate (21). The ratio of the height of the first vertical plate (18) to the height of the second vertical plate (19) is equal to the ratio of the length of the second inclined plate (21) to the length of the first inclined plate (20). The second vertical plate (19) is connected to a pair of back-side balance members (23) outward. The pair of back-side balance members (23) are symmetrically arranged on the left and right sides of the second vertical plate (19). The back-side balance component (23) has an inwardly recessed air storage hole (24) on its side, and the opening of the air storage hole (24) is provided with an anti-overflow ring (25) that converges towards the center to prevent a small amount of wind from escaping. The back-side balancing component (23) is provided with a balancing air inlet (26) and a balancing air outlet (27) on the other side of the air storage blind hole (24), and a bidirectional air duct (28) is formed between the balancing air inlet (26) and the balancing air outlet (27). The sliding base (3) is recessed upward and has a trapezoidal air passage groove (29). The top of the air passage groove (29) is protruding downward and has a pair of damping ribs (30). The midpoint of the distance between the pair of damping ribs (30) is on the same vertical line as the center of gravity of the horizontal feeding mechanism (1) and the longitudinal feeding mechanism (2). The sliding base (3) has a first drag-reducing hole (31) on both sides of the air passage (29), and the back side balance member (23) has a second drag-reducing hole (32) corresponding to the first drag-reducing hole (31). The first drag-reducing hole (31) and the second drag-reducing hole (32) are coaxially arranged, and the first drag-reducing hole (31) and the second drag-reducing hole (32) are connected to form a drag-reducing air passage (33). The sliding base (3) is also provided with an inclined pressure hole (34), which is connected to the drag-reducing air duct (33).

2. The high-stability five-axis machine tool slide rail system according to claim 1, characterized in that, The highest height of the first drag-reducing hole (31) and the second drag-reducing hole (32) is lower than the lowest height of the longitudinal feed mechanism (2).

3. The high-stability five-axis machine tool slide rail system according to claim 1, characterized in that, The Z-axis side plate (15) has a first through hole (35) and a second through hole (36) near the top connecting arm (9) and the vertical connecting arm (10) at the third slider connecting hole (16). The ratio of the diameter of the first through hole (35) to the diameter of the second through hole (36) is equal to the inverse ratio of the shortest distance from the axis of the lead screw (12) to the top slide rail groove (7) to the shortest distance from the axis of the lead screw (12) to the lateral slide rail groove (8).

4. The high-stability five-axis machine tool slide rail system according to claim 1, characterized in that, The first vertical plate (18) is provided with an outwardly extending side wing (37) at the connection between it and the sliding base (3), and the side wing (37) is provided with a second lead screw hole (38).

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