A micro CNC lathe with good chip removal

Abstract

The utility model relates to lathe technical field provides a good micro - numerical control lathe of chip removal, solve the problem that lathe horizontal work surface falls the chip not easy clearance and the chip falls into the guide rail and influences the problem of tool rest feed. Scheme, the work surface of bed body is inclined surface, the lathe still includes: X axle assembly, include: a) X axle bottom plate, set up on the work surface of bed body, have X axle guide rail on it, b) workbench, slide connection in X axle guide rail, its upper portion is fixed with tool rest, c) first linear drive assembly, drive workbench and move along X axle direction, d) X axle protection assembly, install in workbench X axle direction both ends, protect X axle guide rail, Z axle assembly, include: a) Z axle guide rail, set up in the work surface of bed body, X axle bottom plate bottom slide connection in Z axle guide rail, b) second linear drive assembly, drive X axle bottom plate and move along Z axle direction, c) Z axle protection assembly, install in X axle bottom plate Z axle direction both ends, be used for protecting Z axle guide rail.

Description

Technical Field

[0001] This utility model relates to the field of lathe technology, specifically to a miniature CNC lathe with good chip removal. Background Technology

[0002] Machine tools are a crucial component of a nation's manufacturing industry, representing the level of modernization of a nation's manufacturing sector and serving as an important indicator of a country's or region's economic development. They exert a powerful technological advantage in the manufacturing sector. With the passage of time and the rapid advancement of science and technology, the technical requirements for CNC lathes have also increased significantly, exhibiting a trend towards higher precision, higher speed, higher quality, higher yield, and higher efficiency.

[0003] A miniature lathe is a small metalworking machine tool used for precision metal machining and parts processing. It is typically smaller than a traditional large lathe and is suitable for machining small workpieces or applications requiring high precision. Miniature lathes are mainly used in model making, handicrafts, watch repair, DIY projects, and other fields.

[0004] Chinese utility model patent discloses a small horizontal lathe for machining shaft parts, publication number CN222470728U, publication date February 14, 2025. Its horizontally positioned working bed and exposed triangular guide rails cause chips to fall onto the working surface of the bed and into the triangular guide rails during turning, making chip removal difficult and causing jamming, thus affecting the tool post feed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a miniature CNC lathe with excellent chip removal capabilities. It effectively solves the problems described in the prior art, such as the difficulty in cleaning chips falling onto the horizontal working surface of the lathe and the impact of chips falling into the guide rails on the tool post feed.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] A miniature CNC lathe with good chip removal performance includes a bed, a spindle box located at one end of the working surface of the bed, and a three-jaw chuck connected to the spindle of the spindle box. The working surface of the bed is an inclined surface; The lathe also includes: X-axis components include: a) X-axis base plate, set on the working surface of the bed, with X-axis guide rails extending along the X-axis direction; b) The worktable is slidably connected to the X-axis guide rail, and a tool holder is fixed on its upper part; c) A first linear drive assembly for driving the worktable to move along the X-axis; d) X-axis protection assembly, installed at both ends of the worktable in the X-axis direction, is used to protect the X-axis guide rail; Z-axis components include: a) The Z-axis guide rail is located on the working surface of the bed and extends along the Z-axis direction. The bottom of the X-axis base plate is slidably connected to the Z-axis guide rail. b) A second linear drive assembly for driving the X-axis base plate to move along the Z-axis direction; c) Z-axis protection assembly, installed at both ends of the X-axis base plate in the Z-axis direction, is used to protect the Z-axis guide rail.

[0008] Furthermore, the X-axis guide rails are two in number, arranged in parallel and spaced apart; The bottom of the worktable is equipped with two X-axis sliders, which slide in cooperation with two X-axis guide rails respectively.

[0009] Furthermore, the first linear drive component includes: The X-axis lead screw is rotatably connected to the X-axis base plate and is located between the two X-axis guide rails. X-axis lead screw nut seat, fixed to the bottom of the worktable; The X-axis nut is fixed inside the nut seat and is threaded into the X-axis lead screw. The first drive mechanism is used to drive the X-axis lead screw to rotate.

[0010] Furthermore, the first drive mechanism includes: The first X-axis pulley is fixed to one end of the X-axis lead screw; X-axis stepper motor, fixed to the X-axis base plate; The second X-axis pulley is connected to the output shaft of the X-axis stepper motor; The X-axis synchronous belt connects the first X-axis pulley and the second X-axis pulley.

[0011] Furthermore, the X-axis protection assembly includes: The telescopic protective cover on the X-axis is fixed at one end to the rear end of the worktable and at the other end to the X-axis base plate, covering the rear X-axis guide rail and lead screw. The X-axis telescopic protective cover is fixed at one end to the front of the worktable and at the other end to the X-axis base plate, covering the front X-axis guide rail and lead screw.

[0012] Furthermore, the Z-axis guide rails are two in number, arranged in parallel at intervals; The bottom of the X-axis base plate is provided with two Z-axis sliders, which slide in cooperation with two Z-axis guide rails respectively.

[0013] Furthermore, the second linear drive component includes: The Z-axis lead screw is rotatably connected to the working surface of the bed and is located between the two Z-axis guide rails. Z-axis lead screw nut seat, fixed to the bottom of X-axis base plate; The Z-axis nut is fixed inside the nut seat and is threaded into the Z-axis lead screw. The second drive mechanism is used to drive the Z-axis lead screw to rotate.

[0014] Furthermore, the second drive mechanism includes: The first Z-axis pulley is fixed to one end of the Z-axis lead screw; The Z-axis stepper motor is located inside the bed; The second Z-axis pulley is connected to the output shaft of the Z-axis stepper motor; The Z-axis synchronous belt connects the first Z-axis pulley and the second Z-axis pulley.

[0015] Furthermore, the Z-axis protection assembly includes: The left telescopic protective cover of the Z-axis is fixed at one end to the left end of the X-axis base plate and at the other end to the working surface of the bed, covering the left Z-axis guide rail and lead screw; The Z-axis right telescopic protective cover is fixed at one end to the right end of the X-axis base plate and at the other end to the working surface of the bed, covering the right Z-axis guide rail and lead screw.

[0016] Furthermore, the telescopic protective cover includes: Multiple U-shaped plates with downward openings, nested together in sequence; The scissor linkage mechanism includes multiple sets of cross-hinged linkages, with each set of linkages hinged at the bottom of a U-shaped plate at its intersection point.

[0017] This utility model has the following beneficial effects: Excellent chip removal performance: By designing the working surface of the bed as an inclined structure, the chips generated during the cutting process can automatically slide off under the action of gravity, effectively avoiding the accumulation of chips in the machining area and significantly improving chip removal efficiency and cleaning convenience.

[0018] Comprehensive transmission system protection: By setting up X-axis and Z-axis protective components, especially by adopting a telescopic protective cover structure, precision transmission components such as X-axis lead screws, Z-axis lead screws, X-axis guides, and Z-axis guides are completely enclosed, completely preventing cutting fluid and metal chips from entering the transmission system, greatly extending the service life of key components, and ensuring transmission accuracy and reliability.

[0019] High rigidity and motion stability: Both the X and Z axes adopt a double guide rail and double slider layout, and are equipped with ball screw and nut pairs for transmission, which significantly improves the rigidity and stability of the moving parts, effectively suppresses vibration during the machining process, and provides a foundation for achieving high-precision and high-quality machining of micro parts.

[0020] Compact structure and space optimization: By integrating the X-axis stepper motor on the X-axis base plate and cleverly hiding the Z-axis stepper motor inside the bed, and using synchronous belt for transmission, the drive components are built-in, which greatly reduces the overall size of the machine and reflects the design concept of "miniaturization" and "integration".

[0021] High reliability and low maintenance cost: The entire transmission system and guide rails are effectively sealed, avoiding damage to precision components caused by harsh processing environments, reducing equipment failure rate, maintenance requirements and subsequent operating costs.

[0022] Wide applicability: This lathe has a compact structure, reliable performance, and good precision, making it very suitable for teaching demonstrations, scientific research experiments, and the processing and production of small precision parts (such as watch parts, medical device parts, etc.), with broad application prospects. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the main view of this utility model; Figure 2 This is a perspective view of the present invention; Figure 3 This is a two-dimensional view of the present invention. Figure 4 This is a three-dimensional view of the present invention (with the right side panel of the bed removed). Figure 5 This is a perspective view of the Z-axis component of this utility model; Figure 6 This is a two-dimensional view of the Z-axis component of this utility model; Figure 7 This is a three-dimensional view of the Z-axis component of this utility model. Figure 8 This is a perspective view of the X-axis assembly of this utility model; Figure 9 This is a two-dimensional view of the X-axis assembly of this utility model; Figure 10 This is a perspective view of the telescopic protective cover of this utility model; Figure 11 This is a schematic diagram showing the exploded side panel of the bed frame of this utility model.

[0024] Figure reference numerals: Bed 1; Legs 101; Inclined bed body 102; Receiving tray 103; Fastening bolts 104; Side plate 105; Spindle box 2; Three-jaw chuck 3; X-axis assembly 4; X-axis base plate 5; Mounting slot 501; Pulley cover 502; Worktable 6; Tool post 7; First linear drive assembly 8; X-axis protection assembly 9; Z-axis assembly 10; Z-axis guide rail 11; Second linear drive assembly 12; Z-axis protection assembly 13; X-axis guide rail 14; X-axis slider 15; X-axis lead screw 16; X-axis lead screw nut seat 17; X-axis nut 18; First drive mechanism 19; First X-axis pulley 20; X-axis stepper motor 21; Second X-axis pulley 22; Connected to X-axis stepper motor 2 1. Output shaft; 22. Second X-axis pulley; 23. X-axis synchronous belt; 24. Upper telescopic protective cover of X-axis; 25. Lower telescopic protective cover of X-axis; 26. Z-axis slider; 27. Z-axis lead screw; 28. Z-axis lead screw nut seat; 29. ​​Z-axis nut; 30. Second drive mechanism; 31. First Z-axis pulley; 32. Z-axis stepper motor; 33. Second Z-axis pulley; 34. Z-axis synchronous belt; 35. Left telescopic protective cover of Z-axis; 36. Right telescopic protective cover of Z-axis; 37. U-shaped plate; 38. Scissor-type linkage mechanism. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0026] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0028] It should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0029] This invention discloses a miniature CNC lathe with excellent chip removal performance. Specifically, the lathe bed 1 is structurally designed to consist of two parts: the bed legs 101 and the slant bed body 102. For easier machining, these two parts are machined separately. To facilitate assembly, the 45° inclined slant bed body 102 is first placed on a horizontal plane and leveled before being fixed. After assembling the slant bed body with the spindle, it is then connected to the bed legs 101. The slant bed body 102 has a 45° inclination angle, which, compared to a flat bed, is more conducive to chip removal, heat dissipation, and achieves higher machining accuracy and requires less space. The bed legs 101 support the entire machine tool, therefore, the rigidity of the bed legs is crucial, and their design must consider the load-bearing capacity of the entire lathe. A receiving tray 103 is designed under the lathe's bed legs. Chips fall directly from the slant bed onto the receiving tray 103, which is then manually pulled out for cleaning, facilitating part loading and unloading. Due to the operating environment and primary purpose, this mini CNC lathe only requires protection for its main components, such as the motor, guideways, and lead screw. Utilizing the angle between the slant bed and the bed legs in the slant bed CNC lathe's mechanical structure, this design cleverly conceals the spindle motor and X / Z stepper motors under the bed, fully enclosed by partitions. Telescopic protective covers are used for the guideways and lead screw to prevent coolant and metal shavings from splashing or leaking and contacting the motors. A receiving tray is also included to collect workpieces and cutting fluid.

[0030] The transmission system mainly consists of three parts: spindle drive (spindle box 2 and three-jaw chuck 3), X-axis feed drive (X-axis assembly 4), and Z-axis feed drive (Z-axis assembly 10). The X and Z axis guideways are both protected with Cr13 stainless steel, and limit switches are used for X and Z axis detection. This machine tool cleverly conceals the spindle motor and X and Z axis drive motors under the lathe bed, fully enclosed by partitions. Telescopic protective sleeves are used on the ball screw nut assembly and guideways to prevent coolant, metal shavings, and leaks from contacting the motors.

[0031] A receiving tray is designed under the lathe's bed legs. Chips fall directly from the slant bed onto the receiving tray, and the chips are manually pulled out of the tray for cleaning, which also facilitates the loading and unloading of parts.

[0032] The entire lathe transmission system is connected to the motor via synchronous belts. This is because, in addition to the advantages of synchronous belt drives (described below), synchronous belt drives in this design allow the motor to be mounted under the lathe bed, reducing the lathe's overall size. Therefore, the lathe transmission system uses synchronous belt drives.

[0033] Advantages of synchronous belt drive: (1) During operation, there will be no slippage between the synchronous belt and the pulley, and the transmission ratio is very precise; (2) The mechanical efficiency of the transmission is high and the energy-saving effect is good; (3) The transmission ratio range is large and the structure is compact; (4) Maintenance is convenient and the operating cost is low; (5) It can still work normally under harsh environmental conditions.

[0034] As the X-axis feed drive (X-axis assembly 4) in this embodiment, the X-axis assembly adopts a 57BYG250H closed-loop servo motor, which is connected to a ball screw with a pitch of 4mm via a synchronous belt, driving the worktable to move in the X direction on the X-axis base plate. The ball screw adopts a pre-tensioned structure, and the sliding guide adopts an HGH linear guide with good contact force, sufficient rigidity, good accuracy retention, and suitable for various turning requirements.

[0035] For the X-axis assembly 4, the X-axis base plate 5 supports the X-axis assembly 4. Two X-axis guide rails 14 are arranged at intervals on the X-axis base plate 5, and the length direction of the two guide rails extends along the X-axis direction. The X-axis base plate 5 is driven by the first linear drive assembly 8 to move along the guide rails. Specifically, an X-axis lead screw 16 parallel to the two X-axis guide rails 14 is arranged between them, and the X-axis lead screw is rotatably mounted on the X-axis base plate 5. The bottom of the worktable 6 is provided with two X-axis sliders 15, which correspond one-to-one with the two X-axis guide rails 14 and slide with them, so that the worktable 6 can move along the length direction of the guide rails on the X-axis base plate 5. An X-axis lead screw nut seat 17 is fixed at the bottom of the worktable 6, and an X-axis nut 18 is fixed inside the X-axis lead screw nut seat 17. The X-axis nut 18 is threaded onto the X-axis lead screw 16. The first drive mechanism 19 is used to drive the X-axis lead screw 16 to rotate, thereby driving the X-axis nut 18 to move the worktable 6 along the X-axis guide rails 14. The first drive mechanism 19 has a first X-axis pulley 20 fixed to the end of the X-axis lead screw 16, an X-axis stepper motor 21 fixed to the rear of the X-axis base plate 5, a second X-axis pulley 22 fixed to the output shaft of the X-axis stepper motor 21, and an X-axis synchronous belt 23 connecting the two pulleys. A mounting groove 501 is cut at the rear end of the X-axis base plate 5. The first X-axis pulley 20, the second X-axis pulley 22, and the X-axis synchronous belt are installed in the mounting groove 501. A pulley cover 502 is placed over the end of the mounting groove 501 to close it, thus making the drive mechanism internal and preventing debris from flying onto it. The X-axis stepper motor 21 is mounted at the bottom of the X-axis base plate 5, with its output shaft inserted into the mounting groove 501 to mount the second X-axis pulley 22.

[0036] The X-axis assembly 4 also includes an X-axis protective assembly 9, installed at both ends of the worktable 6 along the X-axis direction, for protecting the X-axis guide rails and preventing debris from flying onto the lead screw and guide rails at the bottom. Specifically, the X-axis protective assembly 9 includes an upper telescopic protective cover 24, one end of which is fixed to the rear end of the worktable 6 and the other end of which is fixed to the X-axis base plate 5, covering the rear X-axis guide rail 14 and lead screw 16; and a lower telescopic protective cover 25, one end of which is fixed to the front end of the worktable 6 and the other end of which is fixed to the X-axis base plate 5, covering the front X-axis guide rail 14 and lead screw 16.

[0037] A tool holder 7 is fixed on the worktable 6. The tool holder 7 is used to hold the tool.

[0038] The Z-axis assembly 10 in this embodiment has two Z-axis guide rails 11 fixed on the inclined bed 1. The two Z-axis guide rails 11 are arranged in parallel and spaced apart, and their length extends along the Z-axis direction. Two Z-axis sliders 26 are fixed to the bottom of the X-axis base plate 5, which slide in cooperation with the two Z-axis guide rails 11 respectively. The Z-axis protection assembly 13 is installed at both ends of the X-axis base plate 5 in the Z-axis direction to protect the Z-axis guide rails 11.

[0039] The second linear drive assembly 12 is used to drive the X-axis base plate to slide on the two Z-axis guide rails 11. The second linear drive assembly 12 includes a Z-axis lead screw 27, a Z-axis lead screw nut seat 28, a Z-axis nut 29, and a second drive mechanism 30. The Z-axis lead screw 27 is rotatably connected to the working surface of the bed 1 and is located between the two Z-axis guide rails 11; the Z-axis lead screw nut seat 28 is fixed to the bottom of the X-axis base plate 5; the second drive mechanism 30 is used to drive the Z-axis lead screw 27 to rotate.

[0040] The second drive mechanism 30 includes a first Z-axis pulley 31 fixed to one end of the Z-axis lead screw 27, a Z-axis stepper motor 32 located inside the bed 1, a second Z-axis pulley 33 connected to the output shaft of the Z-axis stepper motor 32, and a Z-axis synchronous belt 34 connecting the first Z-axis pulley 31 and the second Z-axis pulley 33. The Z-axis protection assembly 13 includes: a left telescopic Z-axis protective cover 35, one end fixed to the left end of the X-axis base plate 5 and the other end fixed to the working surface of the bed 1, covering the left Z-axis guide rail 11 and the lead screw 27; and a right telescopic Z-axis protective cover 36, one end fixed to the right end of the X-axis base plate 5 and the other end fixed to the working surface of the bed 1, covering the right Z-axis guide rail 11 and the lead screw 27.

[0041] As a preferred embodiment of this utility model, the telescopic protective cover is composed of multiple U-shaped plates (37) with downward openings nested in a telescopic manner. The protective cover further includes a scissor linkage mechanism (38), which is composed of multiple scissor units connected in series; each scissor unit is formed by two sets of connecting rods hinged by a central pin, and adjacent units are connected to each other through the hinge points at the ends of their connecting rods. The bottom of each U-shaped plate (37) is fixedly connected to the central hinge point of a scissor unit, while the hinge points at the ends of the connecting rods are in a free state and are not directly connected to the U-shaped plate. One end of the telescopic protective cover is fixed to the moving part (such as the X-axis base plate or worktable), and the other end is fixed to the corresponding support base (such as the bed or X-axis base plate), thereby forming a dynamic protective cavity that expands and contracts synchronously with the displacement of the moving part, completely covering the precision transmission components such as guide rails and lead screws within its protective range. This design can effectively isolate contaminants such as cutting fluid and iron filings, prevent them from intruding into the guide rail pair and lead screw pair, and ensure the accuracy and life of the transmission system. In addition, the inclined design of the working surface of the bed allows fallen chips to automatically slide away from the processing area under the action of gravity, or to be easily cleaned, further enhancing the chip prevention and chip removal capabilities of the equipment.

[0042] In use, this invention utilizes the following mechanisms: activating the X-axis stepper motor 21 rotates the second X-axis pulley 22, which in turn drives the first X-axis pulley 20 via the X-axis synchronous belt 23. This drives the X-axis lead screw 16, which in turn moves the worktable 6 along the X-axis guide rail 14 via the X-axis nut 18 and X-axis lead screw nut seat 17, thus completing the X-axis feed. Activating the Z-axis stepper motor 32 rotates the second Z-axis pulley 33, which in turn drives the first Z-axis pulley 31 via the Z-axis synchronous belt 34. This drives the Z-axis lead screw 27, which in turn moves the X-axis base plate 5 along the Z-axis guide rail 11 via the Z-axis nut 29 and Z-axis lead screw nut seat 28, thus completing the Z-axis feed. During feeding or cutting, the telescopic protective cover protects the lead screw and guide rail throughout the process, and the inclined bed and debris on the telescopic protective cover are easy to clean and roll off. Cutting fluid also flows easily down the inclined surface.

[0043] like Figure 11 As shown, the bed in this utility model consists of a slant bed body 102 and bed legs 101. A slot is opened at the front of the upper end of the bed legs 101, and the lower part of the slant bed body 102 is embedded in the slot at a 45° angle. Then, the slant bed body 102 is fixed to the bed legs 101 by multiple fastening bolts 104. A side panel 105 is closed between the bed legs 101 and the slant bed body 102 to block the space between them, and the Z-axis stepper motor 32 is placed in the blocked space, which plays a protective role. A receiving tray 103 is provided at the bottom of the bed legs 101 to receive workpieces and cutting fluid.

Claims

1. A miniature CNC lathe with good chip removal, comprising a bed (1), a spindle box (2) disposed at one end of the working surface of the bed (1), and a three-jaw chuck (3) connected to the spindle of the spindle box (2), characterized in that: The working surface of the bed (1) is an inclined surface; The lathe also includes: X-axis component (4), including: a) X-axis base plate (5) is set on the working surface of the bed (1) and X-axis guide rail (14) extending along the X-axis direction is provided on it; b) The worktable (6) is slidably connected to the X-axis guide rail (14), and a tool holder (7) is fixed on its upper part; c) The first linear drive assembly (8) is used to drive the worktable (6) to move along the X-axis direction; d) X-axis protection assembly (9), installed at both ends of the X-axis direction of the worktable (6), is used to protect the X-axis guide rail (14); Z-axis assembly (10), including: a) Z-axis guide rail (11) is located on the working surface of the bed (1) and extends along the Z-axis direction. The bottom of the X-axis base plate (5) is slidably connected to the Z-axis guide rail (11). b) The second linear drive assembly (12) is used to drive the X-axis base plate (5) to move along the Z-axis direction; c) Z-axis protection assembly (13) is installed at both ends of the X-axis base plate (5) in the Z-axis direction to protect the Z-axis guide rail (11).

2. A miniature CNC lathe with good chip removal according to claim 1, characterized in that: The X-axis guide rails (14) are two in number and are arranged in parallel at intervals; The worktable (6) has two X-axis sliders (15) at its bottom, which slide in cooperation with two X-axis guide rails (14).

3. A miniature CNC lathe with good chip removal according to claim 2, characterized in that, The first linear drive component (8) includes: The X-axis lead screw (16) is rotatably connected to the X-axis base plate (5) and located between the two X-axis guide rails (14); X-axis lead screw nut seat (17) is fixed to the bottom of the worktable (6); The X-axis nut (18) is fixed inside the X-axis lead screw nut seat (17) and is threadedly engaged with the X-axis lead screw (16); The first drive mechanism (19) is used to drive the X-axis lead screw (16) to rotate.

4. A miniature CNC lathe with good chip removal according to claim 3, characterized in that, The first drive mechanism (19) includes: The first X-axis pulley (20) is fixed to one end of the X-axis lead screw (16); X-axis stepper motor (21) is fixed to the X-axis base plate (5); The second X-axis pulley (22) is connected to the output shaft of the X-axis stepper motor (21); The X-axis synchronous belt (23) connects the first X-axis pulley (20) and the second X-axis pulley (22).

5. A miniature CNC lathe with good chip removal according to claim 3, characterized in that, The X-axis protection assembly (9) includes: The telescopic protective cover (24) on the X-axis is fixed at one end to the rear end of the worktable (6) and at the other end to the X-axis base plate (5), covering the rear X-axis guide rail (14) and X-axis lead screw (16); The X-axis telescopic protective cover (25) is fixed at one end to the front end of the worktable (6) and at the other end to the X-axis base plate (5), covering the front X-axis guide rail (14) and X-axis lead screw (16).

6. A miniature CNC lathe with good chip removal according to claim 1, characterized in that: The Z-axis guide rail (11) consists of two parallel and spaced-apart rails. The bottom of the X-axis base plate (5) is provided with two Z-axis sliders (26), which are slidably engaged with two Z-axis guide rails (11).

7. A miniature CNC lathe with good chip removal according to claim 6, characterized in that, The second linear drive assembly (12) includes: The Z-axis lead screw (27) is rotatably connected to the working surface of the bed (1) and located between the two Z-axis guide rails (11); Z-axis lead screw nut seat (28) is fixed to the bottom of X-axis base plate (5); The Z-axis nut (29) is fixed inside the Z-axis lead screw nut seat (28) and is threadedly engaged with the Z-axis lead screw (27); The second drive mechanism (30) is used to drive the Z-axis lead screw (27) to rotate.

8. A miniature CNC lathe with good chip removal according to claim 7, characterized in that, The second drive mechanism (30) includes: The first Z-axis pulley (31) is fixed to one end of the Z-axis lead screw (27); The Z-axis stepper motor (32) is located inside the bed (1); The second Z-axis pulley (33) is connected to the output shaft of the Z-axis stepper motor (32); The Z-axis synchronous belt (34) connects the first Z-axis pulley (31) and the second Z-axis pulley (33).

9. A miniature CNC lathe with good chip removal according to claim 7, characterized in that, The Z-axis protection assembly (13) includes: The left telescopic protective cover (35) of the Z-axis is fixed at one end to the left end of the X-axis base plate (5) and at the other end to the working surface of the bed (1), covering the left Z-axis guide rail (11) and Z-axis lead screw (27); The Z-axis right telescopic protective cover (36) is fixed at one end to the right end of the X-axis base plate (5) and at the other end to the working surface of the bed (1), covering the right Z-axis guide rail (11) and Z-axis lead screw (27).

10. A miniature CNC lathe with good chip removal according to claim 5 or 9, characterized in that, The telescopic protective cover (24, 25, 35, 36) includes: Multiple U-shaped plates (37) with downward openings and nested together in sequence; The scissor linkage mechanism (38) includes multiple sets of cross-hinged linkages, with each set of linkages hinged at the bottom of a U-shaped plate (37).

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