Full-hydrostatic-pressure ultra-precise numerical control lathe

Abstract

The invention relates to the technical field of machining, in particular to a full-hydrostatic-pressure ultra-precision numerical control lathe which comprises a lathe body base, a cover is arranged at the top of the lathe body base, a hydrostatic-pressure spindle headstock is fixedly arranged at the left end of the top of the lathe body through a support, and a three-jaw chuck is arranged at the right end of the hydrostatic-pressure spindle headstock. The hydrostatic guide rail is fixedly installed on the front side of the right end of the top of the lathe bed base, the hydrostatic tailstock is arranged on the hydrostatic guide rail in a sliding mode, the tip is arranged at the left end of the hydrostatic tailstock, the hydrostatic cross-shaped sliding table guide rail is arranged on the rear side of the right end of the top of the lathe bed base, and the servo tool turret is fixedly arranged on the top of the hydrostatic cross-shaped sliding table guide rail. The vibration absorption effect is higher, vibration generated during machining is absorbed, the surface smoothness and precision of a workpiece are improved, meanwhile, a Siemens control system is adopted, the control machining precision is greatly improved, the workpiece is clamped at a time, and size precision machining, shape and position precision machining and smoothness machining can be directly completed.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to an ultra-precision CNC lathe with full liquid static pressure. Background Art

[0002] Ultra-precision CNC lathe is a process testing instrument used in the field of mechanical engineering. It has the characteristics of high precision, high rigidity, high speed and high automation, and is very suitable for processing high-precision parts. Ultra-precision CNC lathes are widely used in many fields, including but not limited to aerospace, mold manufacturing, automobile manufacturing, etc.

[0003] After searching, the invention patent with Chinese patent application number 201911002555.9 discloses a double-walled all-gas hydrostatic vertical lathe, including gas hydrostatic guide rails, gas hydrostatic turntable, door-type beam, Z-axis lifting mechanism, and double-walled columns. The above patent has the following shortcomings: it can only process small workpieces, and the guide rails of the mechanism are gas hydrostatic guide rails, which are much less rigid than liquid hydrostatic guide rails, resulting in strict restrictions on processing materials and not good at processing hard materials. The Z-axis lifting mechanism in this patent is a mechanical mechanism, which has shortcomings in operating accuracy, and after a long period of operation, it will wear out, resulting in reduced accuracy. In view of this, we propose a fully liquid hydrostatic ultra-precision CNC lathe. Summary of the invention

[0004] The object of the present invention is to provide a fully liquid hydrostatic ultra-precision CNC lathe to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A fully liquid hydrostatic ultra-precision CNC lathe, comprising a bed base, a liquid hydrostatic spindle head frame fixedly arranged at the left end of the top of the bed through a bracket, a three-jaw chuck arranged at the right end of the liquid hydrostatic spindle head frame, a liquid hydrostatic guide rail fixedly arranged at the front right end of the top of the bed base, a liquid hydrostatic tailstock slidably arranged on the liquid hydrostatic guide rail, a top point arranged at the left end of the liquid hydrostatic tailstock, a hydrostatic cross slide guide rail arranged at the rear right end of the top of the bed base, and a servo turret fixedly arranged at the top of the hydrostatic cross slide guide rail;

[0007] The hydrostatic spindle headstock, hydrostatic guide rail, hydrostatic tailstock, and hydrostatic cross slide guide rail are also connected to a hydraulic station through pipelines, and the hydraulic station is also connected to an oil cooler;

[0008] A chip conveyor is connected to one side of the bottom of the bed base, a gas drying and filtering device is arranged on one side of the bed base, and the gas drying and filtering device is connected to an external gas source.

[0009] Preferably, the liquid hydrostatic spindle head frame includes a shell I, a core shaft I, and a disc motor. The disc motor is fixedly installed on the left end of the shell I, and both ends of the core shaft I are rotatably arranged inside the shell I through hydrostatic bearings I respectively. The left end of the core shaft I is fixedly connected to the output end of the disc motor, and the right end of the core shaft I is fixedly connected to the three-jaw chuck. A broaching cylinder is also arranged on the left side of the disc motor, and the output end of the broaching cylinder is transmission-connected to the three-jaw chuck. An oil inlet I is arranged on the top of the shell I, and an oil drain I is arranged on the bottom of the shell I. The oil inlet I and the oil drain I are connected to the hydraulic station through pipelines, and sealing rings I are also arranged at both ends of the shell I.

[0010] Preferably, the liquid hydrostatic tailstock includes a shell II and a spindle II, the spindle II is rotatably arranged inside the shell II through a hydrostatic bearing II, a top is fixedly arranged at the left end of the spindle II, an oil inlet II is arranged at the top of the shell II, an oil drain port II is arranged at the bottom of the shell II, the oil inlet II and the oil drain port II are connected to the hydraulic station through pipelines, sealing rings II are also arranged at both ends of the shell II, and a protective cover is arranged at the right end of the shell II.

[0011] Preferably, a fixing frame is fixedly connected to the bottom of the liquid hydrostatic tailstock, the bottom end of the fixing frame is slidably connected to the liquid hydrostatic guide rail, a cylinder is arranged on the right side of the fixing frame, and the output end of the cylinder is drivingly connected to the fixing frame.

[0012] Preferably, the hydrostatic cross slide guide includes a Z-axis liquid hydrostatic guide and an X-axis liquid hydrostatic guide which are arranged perpendicular to each other, the Z-axis liquid hydrostatic guide is fixedly arranged on the top of the bed base, the X-axis liquid hydrostatic guide is slidably arranged on the Z-axis liquid hydrostatic guide, a bearing table is slidably arranged on the X-axis liquid hydrostatic guide, a servo turret is fixedly installed on the bearing table, an oil inlet III is arranged on the top of the bearing table, an oil drain port III is arranged on one side of the Z-axis liquid hydrostatic guide, and the oil inlet III and the oil drain port III are connected to the hydraulic station through pipelines.

[0013] Preferably, a Z-axis grating ruler is provided on one side of the Z-axis liquid hydrostatic guide rail, an X-axis grating ruler is provided on one side of the X-axis liquid hydrostatic guide rail, a first slider is symmetrically provided at the bottom of the X-axis liquid hydrostatic guide rail, the first slider is slidably connected to the Z-axis liquid hydrostatic guide rail, and a second slider is symmetrically provided at the bottom of the bearing table, the second slider is slidably connected to the X-axis liquid hydrostatic guide rail.

[0014] Preferably, a collecting trough is provided on the top of the bed base, the collecting trough is located between the liquid hydrostatic spindle head frame and the liquid hydrostatic guide rail, and the bottom of the collecting trough is located at the upper end of the chip conveyor.

[0015] Preferably, the chip conveyor includes a conveyor belt, a transmission system, and a collection box. One end of the conveyor belt is located below the bottom end of the collection trough, and the other end of the conveyor belt is arranged above the collection box. The transmission system is connected to the conveyor belt.

[0016] Preferably, a knife-beating cylinder is provided on one side of the bed base, and the output end of the knife-beating cylinder is transmission-connected to the servo turret.

[0017] Preferably, foot pads are provided at the four corners of the bottom of the bed base, a cover is provided on the top of the bed base, a box door and a control system are provided on the front side of the cover, and the control system is respectively electrically connected to the hydraulic station, oil cooler, liquid hydrostatic spindle head frame, liquid hydrostatic guide rail, liquid hydrostatic tailstock, hydrostatic cross slide guide rail, servo turret, and chip conveyor for communication.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This fully hydrostatic ultra-precision CNC lathe adopts a hydrostatic spindle headstock, hydrostatic guide rails, hydrostatic tailstock, and hydrostatic cross slide guide rails, which has a stronger shock absorption effect, absorbs the vibration generated during processing, and improves the surface finish and precision of the workpiece. At the same time, the Siemens control system is adopted, which greatly improves the control processing accuracy.

[0020] 2. Compared with traditional mechanical lathes, this fully liquid hydrostatic ultra-precision CNC lathe adopts liquid hydrostatic support, which will not wear out even after long-term operation. The accuracy of components can always maintain the initial accuracy, greatly improving the service life of the lathe and reducing the maintenance cost of the lathe.

[0021] 3. This fully liquid static pressure ultra-precision CNC lathe can achieve ultra-precision turning of parts that require workpiece dimensional accuracy. It can be clamped once and directly processed to the precise size before being processed on a grinder, which greatly saves processing time and equipment costs and significantly improves processing efficiency.

[0022] 4. This fully liquid static pressure ultra-precision CNC lathe can achieve ultra-precision turning of parts that require workpiece shape accuracy. It can be clamped once and directly processed to the required shape accuracy, directly omitting the grinding machine processing, greatly saving processing time and equipment costs, and significantly improving processing efficiency.

[0023] 5. This fully liquid static pressure ultra-precision CNC lathe can achieve ultra-precision turning of parts that have requirements for the surface finish of the workpiece, replace grinding with turning, complete the clamping in one time, and directly process to the required finish, directly omitting the grinding machine processing, greatly saving processing time and equipment costs, and significantly improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of the present invention after the cover body is removed;

[0026] Figure 3 It is a schematic diagram of the structure of the bed base in the present invention;

[0027] Figure 4 It is a schematic diagram of the two-dimensional structure of the liquid hydrostatic spindle head frame in the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the liquid hydrostatic tailstock in the present invention;

[0029] Figure 6 It is a schematic diagram of the two-dimensional structure of the liquid hydrostatic tailstock in the present invention;

[0030] Figure 7 It is a schematic diagram of the structure of the hydrostatic cross slide rail in the present invention;

[0031] Figure 8 This is a front view of the hydrostatic cross slide rail in the present invention;

[0032] Fig. 9 It is a right view of the hydrostatic cross slide guide rail of the present invention;

[0033] Fig.10 It is a schematic diagram of the structure of the chip conveyor in the present invention.

[0034] In the figure: 1. bed base; 11. foot pad; 12. cover; 121. box door; 122. control system; 13. collection tank; 14. tool cylinder; 2. liquid hydrostatic spindle headstock; 21. three-jaw chuck; 22. housing I; 23. spindle I; 24. disc motor; 25. hydrostatic bearing I; 26. tool cylinder; 27. oil inlet I; 28. oil outlet I; 29. ​​sealing ring I; 3. liquid hydrostatic guide rail; 4. liquid hydrostatic tailstock; 40. protective cover; 41. center; 42. housing II; 43. spindle II; 44. hydrostatic bearing II; 45. oil inlet Port II; 46, oil drain port II; 47, sealing ring II; 48, fixed frame; 49, cylinder; 5, hydrostatic cross slide guide; 51, Z-axis liquid hydrostatic guide; 511, Z-axis grating ruler; 52, X-axis liquid hydrostatic guide; 521, X-axis grating ruler; 522, first slider; 53, bearing table; 531, second slider; 54, oil inlet III; 55, oil drain port III; 6, servo turret; 7, chip conveyor; 71, conveyor belt; 72, transmission system; 73, collection box; 8, hydraulic station; 9, oil cooler; 10, gas drying and filtering device. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0039] See also Figure 1-Figure 10 As shown, a technical solution provided by the present invention is:

[0040] Reference Figure 1-3As shown, a fully liquid hydrostatic ultra-precision CNC lathe comprises a bed base 1, wherein the four corners of the bottom of the bed base 1 are provided with feet 11, and a cover body 12 is provided on the top of the bed base 1, and the cover body 12 can provide a closed turning environment. A liquid hydrostatic spindle head frame 2 is fixedly provided at the left end of the top of the bed 1 through a bracket, and a three-jaw chuck 21 is provided at the right end of the liquid hydrostatic spindle head frame 2. A liquid hydrostatic guide rail 3 is fixedly installed on the front side of the right end of the top of the bed base 1, and a liquid hydrostatic tailstock 4 is slidably provided on the liquid hydrostatic guide rail 3. A top 41 is arranged at the left end of the bed 1, and the top 41 cooperates with the three-jaw chuck 21 to process the long-axis workpiece. A hydrostatic cross slide guide 5 is arranged at the rear right end of the top of the bed base 1. A servo turret 6 is fixedly arranged on the top of the hydrostatic cross slide guide 5. The servo turret 6 is equipped with different tool heads. According to the needs of the processing technology, the tool heads can be freely switched so that the workpiece can be clamped once to complete all processes. A tool-beating cylinder 14 is arranged on one side of the bed base 1. The output end of the tool-beating cylinder 14 is transmission-connected with the servo turret 6 to provide power for replacing the tool head of the servo turret 6.

[0041] The liquid hydrostatic spindle head frame 2, the liquid hydrostatic guide rail 3, the liquid hydrostatic tailstock 4, and the hydrostatic cross slide guide rail 5 are also respectively connected to a hydraulic station 8 through pipelines, and the hydraulic station 8 is also connected to an oil cooler 9. The hydraulic station 8 provides stable and continuous oil pressure for the liquid hydrostatic spindle head frame 2, the liquid hydrostatic guide rail 3, the liquid hydrostatic tailstock 4, and the hydrostatic cross slide guide rail 5. The oil cooler 9 can continuously circulate and cool the hydraulic oil so that the hydraulic oil is always kept at a working temperature of 25°C. During processing, heat will be generated when the equipment is running, and the heat will be absorbed by the internal oil film and brought back to the hydraulic station 8. After cooling by the oil cooler, the heat will be recirculated into the liquid hydrostatic spindle head frame 2, the liquid hydrostatic guide rail 3, the liquid hydrostatic tailstock 4, and the hydrostatic cross slide guide rail 5, so that the liquid hydrostatic spindle head frame 2, the liquid hydrostatic guide rail 3, the liquid hydrostatic tailstock 4, and the hydrostatic cross slide guide rail 5 can always work without being affected by temperature rise;

[0042] A chip conveyor 7 is connected to one side of the bottom of the bed base 1, and waste chips generated by turning are discharged through the chip conveyor 7. A gas drying and filtering device 10 is arranged on one side of the bed base 1. The gas drying and filtering device 10 is connected to an external gas source. The gas drying and filtering device 10 includes a solenoid valve, an air source filter and an air source dryer. By filtering and drying the gas, impurities are prevented from entering the interior of the lathe and affecting the accuracy of the lathe.

[0043] In this embodiment, refer to Figure 4As shown, the liquid hydrostatic spindle head frame 2 includes a shell I22, a core shaft I23, and a disk motor 24. The disk motor 24 is fixedly installed at the left end of the shell I22. The two ends of the core shaft I23 are rotatably arranged inside the shell I22 through hydrostatic bearings I25. The left end of the core shaft I23 is fixedly connected to the output end of the disk motor 24, and the right end of the core shaft I23 is fixedly connected to the three-jaw chuck 21. A broaching cylinder 26 is also arranged on the left side of the disk motor 24. The output end of the broaching cylinder 26 is connected to the three-jaw chuck 21. The chuck 21 is transmission connected. When in use, one end of the workpiece is placed in the center of the three-jaw chuck 21. The three-jaw chuck 21 is controlled by the broaching cylinder 26 to clamp and fix the workpiece. The rotation of the core shaft I23 is controlled by the disc motor 24, thereby controlling the rotation of the workpiece. An oil inlet I27 is provided on the top of the shell I22, and an oil outlet I28 is provided on the bottom of the shell I22. The oil inlet I27 and the oil outlet I28 are connected to the hydraulic station 8 through pipelines, and sealing rings I29 are also provided at both ends of the shell I22.

[0044] In this embodiment, refer to Figure 5 , 6 As shown, the liquid hydrostatic tailstock 4 includes a shell II42 and a core shaft II43. The core shaft II43 is rotatably arranged inside the shell II42 through a hydrostatic bearing II44. A top 41 is fixedly arranged at the left end of the core shaft II43. The workpiece is fixed by the top 41. At the same time, the workpiece is rotated by the core shaft II43 to facilitate the processing of long-axis workpieces. An oil inlet II45 is arranged at the top of the shell II42, and an oil outlet II46 is arranged at the bottom of the shell II42. The oil inlet II45 and the oil outlet II46 are connected to the hydraulic station 8 through pipelines. Sealing rings II47 are also arranged at both ends of the shell II42, and a protective cover 40 is arranged at the right end of the shell II42.

[0045] The bottom of the liquid hydrostatic tailstock 4 is fixedly connected to a fixing frame 48, the bottom end of the fixing frame 48 is slidably connected to the liquid hydrostatic guide rail 3, a cylinder 49 is arranged on the right side of the fixing frame 48, the output end of the cylinder 49 is transmission-connected to the fixing frame 48, and the cylinder 49 provides a stable and lasting thrust for the liquid hydrostatic tailstock 4.

[0046] As a preferred implementation of this embodiment, refer to Figure 7-9As shown, the hydrostatic cross slide guide 5 includes a Z-axis liquid hydrostatic guide 51 and an X-axis liquid hydrostatic guide 52 which are arranged perpendicular to each other. The Z-axis liquid hydrostatic guide 51 is fixedly arranged on the top of the bed base 1. The X-axis liquid hydrostatic guide 52 is slidably arranged on the Z-axis liquid hydrostatic guide 51. A bearing table 53 is slidably arranged on the X-axis liquid hydrostatic guide 52. A servo turret 6 is fixedly installed on the bearing table 53. An oil inlet III54 is arranged on the top of the bearing table 53. The Z-axis An oil discharge port III55 is provided on one side of the liquid hydrostatic guide 51, and the oil inlet port III54 and the oil discharge port III55 are connected to the hydraulic station 8 through pipelines, so that a layer of oil film is formed on the sliding contact surface between the Z-axis liquid hydrostatic guide 51 and the X-axis liquid hydrostatic guide 52, and between the X-axis liquid hydrostatic guide 52 and the bearing table 53. When in use, the movement of the bearing table 53 is adjusted by the cooperation of the Z-axis liquid hydrostatic guide 51 and the X-axis liquid hydrostatic guide 52, thereby adjusting the position and distance between the tool head and the workpiece.

[0047] Furthermore, a Z-axis grating scale 511 is provided on one side of the Z-axis liquid hydrostatic guide 51, an X-axis grating scale 521 is provided on one side of the X-axis liquid hydrostatic guide 52, a first slider 522 is symmetrically provided at the bottom of the X-axis liquid hydrostatic guide 52, the first slider 522 is slidably connected to the Z-axis liquid hydrostatic guide 51, a second slider 531 is symmetrically provided at the bottom of the bearing table 53, the second slider 531 is slidably connected to the X-axis liquid hydrostatic guide 52, and the movement of the X-axis liquid hydrostatic guide 52 and the bearing table 53 is driven by a linear motor.

[0048] In this embodiment, a collecting groove 13 is opened on the top of the bed base 1, and the collecting groove 13 is located between the liquid hydrostatic spindle head frame 2 and the liquid hydrostatic guide rail 3. The bottom of the collecting groove 13 is located at the upper end of the chip conveyor 7. The waste chips generated during the turning process enter the collecting groove 13 and enter the chip conveyor 7 through the bottom of the collecting groove 13, thereby preventing a large amount of waste chips from accumulating inside the lathe.

[0049] Further, see Fig.10 As shown, the chip conveyor 7 includes a conveyor belt 71, a transmission system 72, and a collection box 73. One end of the conveyor belt 71 is located below the bottom end of the collection trough 13, and the other end of the conveyor belt 71 is arranged above the collection box 73. The transmission system 72 is connected to the conveyor belt 71 for transmission. The conveyor belt 71 is controlled by the transmission system 72 to transfer waste chips to the collection box 73 for centralized collection.

[0050] In this embodiment, a box door 121 and a control system 122 are provided on the front side of the cover body 12, and the control system 122 is respectively electrically connected to the hydraulic station 8, the oil cooler 9, the liquid hydrostatic spindle head 2, the liquid hydrostatic guide 3, the liquid hydrostatic tailstock 4, the hydrostatic cross slide guide 5, the servo turret 6, and the chip conveyor 7. In this embodiment, the control system 122 adopts a Siemens control system, which greatly improves the control processing accuracy.

[0051] When using the fully liquid hydrostatic ultra-precision CNC lathe of this embodiment, first observe the material, appearance, shape, size and heat treatment hardness requirements of the workpiece, select appropriate fixtures and processing tools, and formulate appropriate processing technology;

[0052] Connect the external gas source so that the dried and filtered gas is first introduced into the equipment including the hydrostatic spindle headstock 2, the hydrostatic guide rail 3, the hydrostatic tailstock 4, the hydrostatic cross slide guide rail 5, the X-axis grating ruler 521, and the Z-axis grating ruler 511, forming a protective cover to isolate impurities from entering;

[0053] After the lathe is ready, the box door 121 on the cover 12 is opened, and the workpiece is fixed on the three-jaw chuck 21. The hydrostatic tailstock 4 is controlled by the cylinder 49 to move on the hydrostatic guide rail 3, so that the top 41 supports the workpiece and corrects the workpiece. The control system 122 selects a suitable turning tool, and the movement of the bearing table 53 is adjusted by the cooperation of the Z-axis hydrostatic guide rail 51 and the X-axis hydrostatic guide rail 52, so as to adjust the position and distance between the tool head and the workpiece. After the tool setting is completed, the turning of the parts begins, and the waste chips generated by the turning are discharged from the inside of the lathe through the chip conveyor 7 to avoid accumulation.

[0054] The whole set of machine tool components are all hydrostatic hydrostatic spindle headstock, hydrostatic guide rail, hydrostatic tailstock, hydrostatic cross slide guide rail and linear motor drive, which have good rigidity and processing accuracy. At the same time, it is equipped with Siemens control system, which greatly improves the control processing accuracy. When processing the workpiece, the workpiece can be clamped once, and the size accuracy processing, shape position accuracy processing and finish processing can be completed directly.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fully liquid hydrostatic ultra-precision CNC lathe, comprising a bed base (1), characterized in that: A liquid hydrostatic spindle head frame (2) is fixedly provided at the left end of the top of the bed (1) through a bracket, a three-jaw chuck (21) is provided at the right end of the liquid hydrostatic spindle head frame (2), a liquid hydrostatic guide rail (3) is fixedly installed at the front right end of the top of the bed base (1), a liquid hydrostatic tailstock (4) is slidably provided on the liquid hydrostatic guide rail (3), a top point (41) is provided at the left end of the liquid hydrostatic tailstock (4), a hydrostatic cross slide guide rail (5) is provided at the rear right end of the top of the bed base (1), and a servo turret (6) is fixedly provided at the top of the hydrostatic cross slide guide rail (5); The liquid hydrostatic spindle headstock (2), the liquid hydrostatic guide rail (3), the liquid hydrostatic tailstock (4), and the hydrostatic cross slide guide rail (5) are also respectively connected to a hydraulic station (8) through pipelines, and the hydraulic station (8) is also connected to an oil cooler (9); A chip conveyor (7) is connected to one side of the bottom of the bed base (1), and a gas drying and filtering device (10) is provided on one side of the bed base (1), and the gas drying and filtering device (10) is connected to an external gas source.

2. The fully liquid hydrostatic ultra-precision CNC lathe according to claim 1, characterized in that: The liquid hydrostatic spindle head frame (2) comprises a housing I (22), a core shaft I (23), and a disk motor (24). The disk motor (24) is fixedly mounted on the left end of the housing I (22). Both ends of the core shaft I (23) are rotatably arranged inside the housing I (22) via hydrostatic bearings I (25). The left end of the core shaft I (23) is fixedly connected to the output end of the disk motor (24). The right end of the core shaft I (23) is fixedly connected to the three-jaw chuck (21). A broaching cylinder (26) is also provided on the left side of the disc motor (24), and the output end of the broaching cylinder (26) is drivingly connected to the three-jaw chuck (21). An oil inlet I (27) is provided on the top of the shell I (22), and an oil outlet I (28) is provided on the bottom of the shell I (22). The oil inlet I (27) and the oil outlet I (28) are connected to the hydraulic station (8) through pipelines. Sealing rings I (29) are also provided at both ends of the shell I (22).

3. The fully liquid hydrostatic ultra-precision CNC lathe according to claim 2, characterized in that: The liquid hydrostatic tailstock (4) comprises a housing II (42) and a spindle II (43). The spindle II (43) is rotatably arranged inside the housing II (42) via a hydrostatic bearing II (44). A top (41) is fixedly arranged at the left end of the spindle II (43). An oil inlet II (45) is arranged at the top of the housing II (42). An oil outlet II (46) is arranged at the bottom of the housing II (42). The oil inlet II (45) and the oil outlet II (46) are connected to a hydraulic station (8) via pipelines. Sealing rings II (47) are also arranged at both ends of the housing II (42). A protective cover (40) is arranged at the right end of the housing II (42).

4. The fully liquid hydrostatic ultra-precision CNC lathe according to claim 3, characterized in that: The bottom of the hydrostatic tailstock (4) is fixedly connected to a fixing frame (48), the bottom end of the fixing frame (48) is slidably connected to the hydrostatic guide rail (3), a cylinder (49) is arranged on the right side of the fixing frame (48), and the output end of the cylinder (49) is drivingly connected to the fixing frame (48).

5. The fully liquid hydrostatic ultra-precision CNC lathe according to claim 4, characterized in that: The hydrostatic cross slide guide rail (5) comprises a Z-axis hydrostatic guide rail (51) and an X-axis hydrostatic guide rail (52) which are arranged perpendicular to each other. The Z-axis hydrostatic guide rail (51) is fixedly arranged on the top of the bed base (1). The X-axis hydrostatic guide rail (52) is slidably arranged on the Z-axis hydrostatic guide rail (51). A bearing table (53) is slidably arranged on the X-axis hydrostatic guide rail (52). A servo turret (6) is fixedly installed on the bearing table (53). An oil inlet III (54) is arranged at the top of the bearing table (53). An oil discharge port III (55) is arranged on one side of the Z-axis hydrostatic guide rail (51). The oil inlet III (54) and the oil discharge port III (55) are connected to a hydraulic station (8) through pipelines.

6. The fully liquid hydrostatic ultra-precision CNC lathe according to claim 5, characterized in that: A Z-axis grating ruler (511) is arranged on one side of the Z-axis liquid hydrostatic guide rail (51), an X-axis grating ruler (521) is arranged on one side of the X-axis liquid hydrostatic guide rail (52), a first slider (522) is symmetrically arranged at the bottom of the X-axis liquid hydrostatic guide rail (52), the first slider (522) is slidably connected to the Z-axis liquid hydrostatic guide rail (51), and a second slider (531) is symmetrically arranged at the bottom of the bearing table (53), the second slider (531) is slidably connected to the X-axis liquid hydrostatic guide rail (52).

7. The fully liquid hydrostatic ultra-precision CNC lathe according to claim 6, characterized in that: A collecting trough (13) is provided on the top of the bed base (1), the collecting trough (13) is located between the liquid hydrostatic spindle head frame (2) and the liquid hydrostatic guide rail (3), and the bottom of the collecting trough (13) is located at the upper end of the chip conveyor (7).

8. The fully liquid hydrostatic ultra-precision CNC lathe according to claim 7, characterized in that: The chip conveyor (7) comprises a conveyor belt (71), a transmission system (72), and a collection box (73); one end of the conveyor belt (71) is located below the bottom end of the collection trough (13), and the other end of the conveyor belt (71) is arranged above the collection box (73); the transmission system (72) is in transmission connection with the conveyor belt (71).

9. The fully liquid hydrostatic ultra-precision CNC lathe according to claim 8, characterized in that: A knife-beating cylinder (14) is provided on one side of the bed base (1), and an output end of the knife-beating cylinder (14) is transmission-connected to a servo turret (6).

10. The fully liquid hydrostatic ultra-precision CNC lathe according to claim 9, characterized in that: The four corners of the bottom of the bed base (1) are provided with footrests (11), the top of the bed base (1) is provided with a cover body (12), the front side of the cover body (12) is provided with a box door (121) and a control system (122), and the control system (122) is respectively connected to the hydraulic station (8), the oil cooler (9), the liquid hydrostatic spindle head frame (2), the liquid hydrostatic guide rail (3), the liquid hydrostatic tailstock (4), the hydrostatic cross slide guide rail (5), the servo turret (6), and the chip conveyor (7) for communication and electrical connection.

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