A multi-functional CNC machine tool for CNC machining centers

Abstract

This invention relates to the field of multi-functional CNC machine tools, and in particular to a multi-functional CNC machining center, comprising a spindle, a main rotary table, a secondary rotary table, a motor base, gears, and an extension mounting base. The invention rotatably mounts a smaller-diameter secondary rotary table within a larger-diameter main rotary table, ensuring that the spindle, after rotating one revolution with the secondary rotary table, coincides with the axis of the main rotary table. Boring is achieved by allowing the larger-diameter main rotary table to rotate relative to the extension mounting base. The boring diameter is adjusted by driving the secondary rotary table to rotate relative to the main rotary table. A gear and pulley clutch structure locks the spindle's position relative to the main rotary table, enabling high-speed engraving and milling. This allows two different machining characteristics to be achieved using only one machine bed, effectively solving the problem in existing technologies where workpiece engraving and boring require switching between two devices, leading to reduced processing efficiency and higher equipment costs.

Description

Technical Field

[0001] This invention relates to the field of multifunctional CNC machine tools, and in particular to a multifunctional CNC machine tool for CNC machining centers. Background Technology

[0002] In general boring, a circular groove needs to be milled first, and then the hole is bored. The CNC machine tools used for milling and boring are two different types of machining equipment. The difference between them is that one is a CNC engraving and milling machine (generally or commonly known), characterized by a fast feed rate (the lead screw has a large pitch and a relatively small load capacity), a high spindle speed but a small depth of cut, and is suitable for efficient engraving and milling of various characteristics. The other is a drilling and tapping machine (generally or commonly known), characterized by a relatively slow feed rate (the lead screw has a small pitch), a low spindle speed but a strong torque, and is suitable for applications requiring low speed and high torque, such as boring.

[0003] The structures of the two types of CNC machine tools mentioned above are very similar. Taking a three-axis CNC machine tool as an example, both engraving and milling and drilling and tapping have X-axis (left and right movement), Y-axis (forward and backward movement) and Z-axis (up and down movement). The drive forms are also linear guides, CNC motors and lead screws. However, they cannot be used interchangeably in terms of processing technology due to their respective characteristics. For example, a workpiece has a relatively complex cavity that requires flexible and high-speed engraving and milling, while the inner wall of the circumference needs to be bored for high-precision machining. In this case, an engraving and milling machine tool with insufficient spindle speed and torque will have difficulty completing the boring, while the spindle speed of a drilling and tapping machine tool is too low to perform engraving and milling efficiently.

[0004] Currently, apart from special machine tools, the development of servo motors has effectively solved the problem of the incompatibility between high speed and high torque in traditional CNC motors. This makes it difficult for machine tools to be limited by CNC motors and lead screw pitch in terms of feed speed and load capacity. This allows drilling and tapping machine tools to also achieve high feed speeds. However, the incompatibility between drilling and tapping spindles and engraving and milling spindles remains a pain point that limits the processing efficiency of related products. Therefore, in order to solve the problem of needing to switch between two types of equipment for engraving and milling of workpieces, which leads to reduced processing efficiency and high equipment costs, a multi-functional CNC machine tool for CNC machining centers is proposed. Summary of the Invention

[0005] In view of the problems in the above or existing technologies where milling and boring of workpieces require switching between two types of equipment, resulting in reduced processing efficiency and high equipment costs, this invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a multi-functional CNC machine tool for CNC machining centers.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a multi-functional CNC machine tool for CNC machining centers, comprising a spindle, and further comprising: a main rotary table for boring operations when rotating; an auxiliary rotary table rotatably nested within the main rotary table, wherein the spindle is rotatably connected to one side of the auxiliary rotary table, and the spindle coincides with the axis of the main rotary table once or twice when the auxiliary rotary table rotates one revolution; and a motor base for connecting the auxiliary rotary table and a CNC motor, wherein the spindle is rotatably connected to the motor base, and a space is provided between the spindle and the CNC motor. It has a pulley and a timing belt; a gear, which is non-contactly sleeved with the main shaft, the end face of the gear nesting with the end face of the pulley on the main shaft, and meshing with the gear ring on the main turntable to drive the auxiliary turntable to rotate. The end face of the gear is provided with a protrusion, and the motor base is provided with a piston along the radial direction of the gear. The end of the piston is inserted and matched with the inclined groove on the protrusion to control the engagement and disengagement of the gear and pulley and to achieve braking between the auxiliary turntable and the main turntable; an extension mounting base is used to support the main turntable and also to connect to the machine tool bed.

[0008] As a preferred embodiment of the multi-functional CNC machine tool for CNC machining center of the present invention, wherein: the main body of the extension mounting base is square box-shaped, and a rotary support is provided between the extension mounting base and the main turntable, and the peripheral wall of the main turntable is provided with toothed grooves for belt drive.

[0009] As a preferred embodiment of the multi-functional CNC machine tool for CNC machining center of the present invention, wherein: a second rotary support is provided between the auxiliary rotary table and the main rotary table, and the gear ring is coaxial with the second rotary support, and the gear ring, the outer ring of the second rotary support and the main rotary table are fixedly connected.

[0010] As a preferred embodiment of the multi-functional CNC machine tool for CNC machining center of the present invention, wherein: a bearing 1 is clamped in the motor base, a bearing 2 is clamped in the auxiliary turntable, the main spindle and the surface of the auxiliary turntable are perpendicular to each other, and a retaining spring is clamped at one end of the main spindle, the retaining spring being disposed at the end of the inner ring of bearing 2 away from bearing 1, and a nut is threadedly connected to the other end of the main spindle, the nut abutting against the end of the inner ring of bearing 1 away from bearing 2.

[0011] As a preferred embodiment of the multi-functional CNC machine tool for CNC machining center of the present invention, wherein: the motor base and the auxiliary turntable are bolted together, and a positioning pin is provided between the motor base and the auxiliary turntable; the output shaft of the motor is parallel to the main shaft and both are fixedly sleeved with pulleys; and the synchronous belt is matched and wound between the two pulleys.

[0012] As a preferred embodiment of the multi-functional CNC machine tool for CNC machining center of the present invention, wherein: the motor base is machined with a clearance channel at the synchronous belt, and four tensioning shafts are symmetrically arranged on the inner walls of both sides of the channel on the motor base. Each end of the tensioning shaft is sleeved with a bearing three, and the bearing three and the tensioning shaft are sleeved with the motor base, and the wrap angle of the sleeve is 180 degrees. The tensioning shaft is arranged on both sides of the synchronous belt, and the wrap angle of the synchronous belt with the pulley is greater than 180 degrees.

[0013] As a preferred embodiment of the multi-functional CNC machine tool for CNC machining center of the present invention, wherein: the diameter of the contact point between the tensioning shaft and the synchronous belt is larger than the two ends of the tensioning shaft and the bearing three assembly, and neither the two ends of the tensioning shaft nor the inner ring of the bearing three contacts the motor base.

[0014] As a preferred embodiment of the multi-functional CNC machine tool for CNC machining center of the present invention, wherein: the annular end face of the gear is provided with a frustum in an annular array, and the frustum is matched and inserted with the pulley, and the gear is also embedded with a magnet between the short pins to attract the pulley.

[0015] As a preferred embodiment of the multi-functional CNC machine tool for CNC machining center of the present invention, the motor base has circular holes machined on both sides along the radial direction of the gear, and the piston is sealed and slidably sleeved with the circular holes. The end of the circular hole away from the gear is sealed and fixedly sleeved with a cover, and the cover is connected to a compressed air pipe.

[0016] As a preferred embodiment of the multi-functional CNC machine tool for CNC machining center of the present invention, the CNC motor, motor base and accessories assembled on the motor base are all within the projection range of the sub-turntable along its axial direction.

[0017] The beneficial effects of the multi-functional CNC machine tool for CNC machining centers of the present invention are as follows: The present invention rotates and assembles a smaller diameter auxiliary turntable within a larger diameter main turntable, so that the spindle, after rotating one revolution with the auxiliary turntable, coincides with the axis of the main turntable. By allowing the larger diameter main turntable to rotate relative to the extended mounting base, boring is achieved. The diameter of the boring is adjusted by driving the auxiliary turntable to rotate relative to the main turntable. Through the clutch structure of gears and pulleys, the position of the spindle relative to the main turntable is locked, thereby enabling high-speed engraving and milling. This allows two different machining characteristics to be achieved using only one machine bed, effectively solving the problem in the prior art where workpiece engraving and milling and boring require switching between two devices, resulting in reduced machining efficiency and high equipment costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the 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.

[0019] Figure 1 A schematic diagram of the structure of a multi-functional CNC machine tool for CNC machining centers.

[0020] Figure 2 for Figure 1 A structural diagram of the oblique elevation view.

[0021] Figure 3 This is a schematic diagram showing the position of the spindle when it is on the axis of the main turntable.

[0022] Figure 4 This is a schematic diagram showing the position of the main spindle when it is far from the axis of the main turntable.

[0023] Figure 5 A schematic diagram of the assembly structure of the main turntable and the auxiliary turntable.

[0024] Figure 6 This is a schematic diagram of the assembly structure of the motor mount and the spindle.

[0025] Figure 7 for Figure 6 A structural diagram of an oblique elevation view.

[0026] Figure 8 This is a schematic diagram of the belt drive structure for the main shaft.

[0027] Figure 9 This is a sectional view of the assembly structure of the motor base and the tensioning shaft.

[0028] Figure 10 This is a schematic diagram of the assembly structure between the motor base, spindle, gear, and gear ring.

[0029] Figure 11 This is a cross-sectional view of the assembly structure of the gear and the piston on the motor mount.

[0030] Figure 12 for Figure 11 A schematic diagram of the structure after further sectioning.

[0031] Figure 13 This is a schematic diagram of the assembly structure between the motor base, bearing one, auxiliary turntable, bearing two, and main shaft.

[0032] In the diagram: 100, main spindle; 101, bearing one; 102, bearing two; 103, snap ring; 104, nut; 200, main turntable; 201, gear ring; 300, auxiliary turntable; 301, slewing support two; 302, positioning pin; 400, motor base; 4001, round hole; 401, piston; 402, cap; 403, compressed air pipe; 500, gear; 501, protrusion; 5011, inclined groove; 502, frustum; 503, magnet; 600, extension mounting base; 601, slewing support one; 700, CNC motor; 701, pulley; 702, synchronous belt; 703, tensioning shaft; 704, bearing three. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Example, refer to Figures 1-13 This embodiment provides a multi-functional CNC machine tool for CNC machining centers, which can achieve the effect of both engraving and milling and drilling and tapping with one CNC machine tool.

[0035] To highlight the core content of this invention and to save space, the similar bed parts between drilling and tapping machine tools and engraving and milling machine tools will not be described in detail.

[0036] like Figure 1 and Figure 2 As shown, the present invention includes a spindle 100, and further includes: a main turntable 200, which is used for boring operations when rotating; and a secondary turntable 300, which is nested within the main turntable 200. (See reference) Figure 3 and Figure 4 The main shaft 100 is rotatably connected to one side of the auxiliary turntable 300. When the main shaft 100 rotates one revolution with the auxiliary turntable 300, the axis of the main shaft 100 coincides with that of the main turntable 200 one or two times. Figure 13 As shown, the motor mount 400 is used to connect the auxiliary turntable 300 and the CNC motor 700. The main spindle 100 is rotatably connected to the motor mount 400, as shown. Figure 7 and Figure 8 As shown, a pulley 701 and a synchronous belt 702 are provided between the spindle 100 and the CNC motor 700; Figure 10 As shown, gear 500 and spindle 100 are engaged without contact, as... Figure 12As shown, the end face of gear 500 is nested with the end face of pulley 701 on main shaft 100 and meshes with gear ring 201 on main turntable 200 to drive the rotation of auxiliary turntable 300. A protrusion 501 is provided on the end face of gear 500, and a piston 401 is provided on motor base 400 along the radial direction of gear 500. The end of piston 401 is inserted and matched with the inclined groove 5011 on protrusion 501, used to control the engagement and disengagement of gear 500 and pulley 701 and to achieve braking between auxiliary turntable 300 and main turntable 200; Figure 1 As shown, the extension mounting base 600 is used to support the main turntable 200 and also to connect to the bed of the machine tool.

[0037] like Figure 1 As shown, and refer to Figure 4 and Figure 5 The CNC motor 700, the motor base 400, and the accessories mounted on the motor base 400 are all within the projection range of the sub-turntable 300 along its axial direction.

[0038] Specifically:

[0039] like Figure 2 As shown, the main body of the extension mounting base 600 is square-shaped (this shape facilitates the installation of the power system that drives the main turntable 200 to rotate), and a rotary support 601 is provided between the extension mounting base 600 and the main turntable 200. The peripheral wall of the main turntable 200 is provided with toothed grooves for belt drive, which are used to connect the belt to drive the main turntable 200 to rotate for boring.

[0040] like Figure 5 As shown, a second rotary support 301 is provided between the secondary rotary table 300 and the main rotary table 200, and the gear ring 201 is coaxial with the second rotary support 301. The gear ring 201, the outer ring of the second rotary support 301, and the main rotary table 200 are fixedly connected. Figure 13 As shown, a bearing 101 is clamped inside the motor base 400, and a bearing 102 is clamped inside the auxiliary turntable 300. The surfaces of the main shaft 100 and the auxiliary turntable 300 are perpendicular to each other. A retaining ring 103 is clamped at one end of the main shaft 100. The retaining ring 103 is located at the end of the inner ring of the bearing 102 away from the bearing 101. A nut 104 is threaded to the other end of the main shaft 100, and the nut 104 abuts against the end of the inner ring of the bearing 101 away from the bearing 102.

[0041] The outer rings of bearing 101 and bearing 102, located close to each other, directly abut against the motor base 400 and the auxiliary turntable 300, respectively. The main shaft 100 is hooked to the outer end of bearing 102 via a snap ring 103. By controlling the distance between the nut 104 and the snap ring 103, the main shaft 100 is tightened between bearings 101 and 102. Bearings 101 and 102 should be angular contact bearings to improve their load-bearing capacity during axial locking. Figure 7 and Figure 13 As shown, the motor base 400 and the auxiliary turntable 300 are bolted together, and a positioning pin 302 is provided between the motor base 400 and the auxiliary turntable 300. The four bolts lock the auxiliary turntable 300 and the motor base 400 together, and the coaxiality positioning between bearing 101 and bearing 202 is achieved by the two positioning pins 302.

[0042] like Figure 7 , Figure 8 and Figure 9 As shown, the output shaft of the CNC motor 700 is parallel to the spindle 100 and is fixedly sleeved with pulleys 701. The synchronous belt 702 is matched and wound between the two pulleys 701. The motor base 400 has a clearance channel machined at the synchronous belt 702. Four tensioning shafts 703 are symmetrically arranged on the inner walls of the two sides of the channel of the motor base 400. Bearings 704 are sleeved at both ends of the tensioning shaft 703. The diameter of the contact point between the tensioning shaft 703 and the synchronous belt 702 is larger than the two ends of the tensioning shaft 703 and the bearings 704. The two ends of the tensioning shaft 703 and the inner ring of the bearings 704 do not contact the motor base 400. The bearings 704 and the tensioning shaft 703 are sleeved with the motor base 400, and the wrap angle of the sleeve is 180 degrees. The tensioning shaft 703 is set on both sides of the synchronous belt 702, and the wrap angle of the synchronous belt 702 with the pulley 701 is greater than 180 degrees.

[0043] In the above-mentioned tensioning structure, a semi-enclosed assembly form of tensioning shaft 703 is used. When the CNC motor 700 (the output end of the CNC machine tool motor generally has a positioning ring step) is assembled in place, after the synchronous belt 702 is tightened, it will firmly press the bearings 704 at both ends of tensioning shaft 703 into the grooves of the bearings 704 on the motor base 400. This eliminates the need for a traditional tensioning wheel tensioning mechanism, thereby simplifying the structural design and facilitating disassembly and maintenance. After the CNC motor 700 is loosened, the tensioning shaft 703 can be removed by hand.

[0044] like Figure 12 As shown, the annular end face of the gear 500 is provided with a frustum 502 in an annular array, and the frustum 502 is matched and inserted with the pulley 701. The gear 500 is also embedded with a magnet 503 between the short pins, which attracts the pulley 701. The motor base 400 has round holes 4001 machined on both sides along the radial direction of the gear 500. The piston 401 is sealed and slidably sleeved with the round hole 4001. The end of the round hole 4001 away from the gear 500 is sealed and fixedly sleeved with a cap 402, and the cap 402 is connected to a compressed air pipe 403.

[0045] First, based on the above structural functions, explain the implementation method of engraving and milling, as well as the closely related parts:

[0046] Based on the precise control of the rotation angle by the CNC motor 700, when the gear 500 engages with the pulley 701 via the frustum 502, the relative positions of the gear 500 and pulley 701 are determined. In the engaged state, the groove 5011 of the protrusion 501 on the gear 500 is aligned with the piston 401, and the rotation angle of the output shaft of the CNC motor 700 is set to zero. Therefore, regardless of the rotation angle of the output shaft of the CNC motor 700, as long as the rotation coordinate of the CNC motor 700 is returned to zero each time, the groove 5011 of the protrusion 501 on the gear 500 can be realigned with the piston 401. For example, in… Figure 3 In this state, when the spindle 100 is at the axis of the main turntable 200, it is set to the zero position. Then, the zero return command will cause the CNC motor 700 to drive the auxiliary turntable 300 to rotate relative to the main turntable 200 through belt drive, gear 500 and gear ring 201, so that the spindle 100, which is in any position, returns to the zero position coaxial with the main turntable 200.

[0047] like Figure 11 As shown, compressed air drives piston 401 through compressed air pipe 403 (compressed air pipe 403 is connected to compressed air source through rotary air connector) to push into the inclined groove 5011 of gear 500, overcoming the magnetic attraction between magnet 503 on gear 500 and pulley 701, separating gear 500 and pulley 701. During the process, gear 500 is always engaged with gear ring 201. Thus, motor base 400 is connected to gear 500 through piston 401 to achieve relative stillness between the two. Gear ring 201 is fixedly connected to main turntable 200. Since gear 500 is always engaged with gear ring 201, the auxiliary turntable 300 is stationary relative to the main turntable 200. At this time, gear 500 is disconnected from pulley 701, and CNC motor 700 can drive spindle 100 to rotate through belt drive for high-speed rotation engraving and milling.

[0048] It is important to note that gear 500 is never in contact with spindle 100, leaving an air gap to allow the equipment to operate in engraving and milling mode, thus preventing gear 500 from scraping against the high-speed rotating spindle 100. The piston 401 is cylindrical in shape, but the end that intersects with the inclined groove 5011 is rectangular, so that gear 500 remains coaxial with pulley 701 after being forked away by piston 401. The angular coordinates of CNC motor 700 are returned to the zero position of the corresponding groove on the pulley 701 on the frustum 502. The compressed air is switched to negative pressure, causing piston 401 to retract. Under magnetic attraction, gear 500 re-engages with pulley 701.

[0049] Combining the above structure and functional principles, explain how to perform boring operations on the same set of equipment:

[0050] like Figure 5As shown, the main turntable 200 relies on the extension mounting base 600 and the rotary support 601, and has the same toothed features as the pulley 701. Obviously, the diameter of the main turntable 200 body is relatively large, which is equivalent to the end synchronous pulley in a reduction transmission system. The main turntable 200 is driven to rotate by conventional belt drive in the prior art with a low transmission ratio. First, it can easily meet the requirements of low machining speed and high output torque for boring. Second, in the state of low-speed boring, with the help of a robust bed and high-rigidity roller guides, shock-absorbing machine feet and other accessories, the dynamic balance effect can be suppressed within an acceptable range. Third, when performing engraving and milling, it is also responsible for keeping the main turntable 200 stationary relative to the extension mounting base 600 (the stationary torque comes from the motor driving the belt drive).

[0051] This device operates under the following conditions during boring: one is... Figure 3 and Figure 4 The minimum and maximum boring radii are shown respectively, and the two limit boring dimensions can be steplessly adjusted. The adjustment method is CNC motor 700, belt drive, gear 500 and gear ring 201, which drive the spindle 100 to revolve around the axis of the main turntable 200. The spindle 100 moves from... Figure 3 The location is reached after circling 180 degrees. Figure 4 During the process, the CNC motor 700 can be stopped at any time, thus allowing for stepless adjustment of the boring radius.

[0052] It should be noted that this invention still needs to be combined with some existing technologies in CNC machining to be used smoothly, such as tool calibration and tool and workpiece blank setting.

[0053] In summary, this invention rotatably mounts a smaller diameter auxiliary turntable 300 within a larger diameter main turntable 200, ensuring that the spindle 100 coincides with the axis of the main turntable 200 after one revolution of the auxiliary turntable 300. Boring is achieved by allowing the larger diameter main turntable 200 to rotate relative to the extended mounting base 600. The diameter of the boring is adjusted by driving the auxiliary turntable 300 to rotate relative to the main turntable 200. The position of the spindle 100 relative to the main turntable 200 is locked through the clutch structure of the gear 500 and pulley 701, enabling high-speed engraving and milling. This allows two different processing characteristics to be achieved using only one machine bed, effectively solving the problem in the prior art where switching between two devices is required for workpiece engraving and boring, leading to reduced processing efficiency and higher equipment costs.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A multi-functional numerical control machine tool for a numerical control machining center, comprising a spindle (100), characterized in that, Also include: Main turntable (200), for boring when rotating; Sub-turntable (300), rotating nested in the main turntable (200), and the main shaft (100) is rotatably connected to one side of the sub-turntable (300), the main shaft (100) rotates a circle with the sub-turntable (300), the main shaft (100) coincides with the main turntable (200) axis once or twice; Motor seat (400) for connecting sub-turntable (300) and numerical control motor (700), the main shaft (100) is rotatably connected with the motor seat (400), and the main shaft (100) and the numerical control motor (700) are provided with pulley (701) and synchronous belt (702); Gear (500), contactless sleeve joint with the main shaft (100), the end face of the gear (500) is nested with the pulley (701) end face on the main shaft (100), and is engaged with the gear ring (201) on the main turntable (200) for driving the sub-turntable (300) to rotate, the end face of the gear (500) is provided with a lug (501), and the motor seat (400) is provided with a piston (401) along the radial direction of the gear (500), the end of the piston (401) is inserted and matched with the inclined slot (5011) on the lug (501), for controlling the clutch of the gear (500) and the pulley (701), and realizing the brake between the sub-turntable (300) and the main turntable (200); Extension mounting seat (600) for bearing the main turntable (200), also for connecting with the bed of machine tool; The motor seat (400) and the sub-turntable (300) are bolted, and the motor seat (400) and the sub-turntable (300) are provided with a positioning column pin (302), the output shaft of the numerical control motor (700) is parallel to the main shaft (100), and both are fixedly sleeved with a pulley (701), the synchronous belt (702) is matched and wound between the two pulleys (701), the motor seat (400) is processed with a clearance passage at the synchronous belt (702), and the motor seat (400) is symmetrically provided with four tension shafts (703) on the inner walls of the two sides of the passage, the two ends of the tension shaft (703) are sleeved with bearing three (704), and the bearing three (704) and the tension shaft (703) are sleeved with the motor seat (400), and the included angle of the sleeve is one hundred and eighty degrees, the tension shaft (703) is arranged on both sides of the synchronous belt (702), and the included angle of the synchronous belt (702) to the pulley (701) is greater than one hundred and eighty degrees, the diameter of the contact part of the tension shaft (703) and the synchronous belt (702) is greater than that of the two ends of the tension shaft (703) and the bearing three (704), and the inner ring of the two ends of the tension shaft (703) and the bearing three (704) is not in contact with the motor seat (400).

2. The multi-functional NC machine tool for a CNC machining center according to claim 1, characterized by: The main body of the extension mounting seat (600) is a square box, and the extension mounting seat (600) and the main turntable (200) are provided with a rotary support (601), and the peripheral wall of the main turntable (200) is provided with a gear slot for belt drive.

3. The multi-functional NC machine tool for a CNC machining center according to claim 1, characterized by: Rotary support two (301) is arranged between the sub-disk (300) and the main disk (200), and the gear ring (201) is coaxial with the rotary support two (301), and the gear ring (201) and the outer ring of the rotary support two (301) are fixedly connected with the main disk (200).

4. The multi-functional NC machine tool for a CNC machining center according to claim 1, characterized by: The bearing one (101) is clamped in the motor seat (400), the bearing two (102) is clamped in the sub-disk (300), the main shaft (100) is perpendicular to the disc surface of the sub-disk (300), one end of the main shaft (100) is clamped with the snap spring (103), the snap spring (103) is arranged in the inner ring of the bearing two (102) away from one end of the bearing one (101), the other end of the main shaft (100) is threadedly connected with the nut (104), and the nut (104) abuts against the inner ring of the bearing one (101) away from the bearing two (102).

5. The multi-functional NC machine tool for NC machining center as claimed in claim 1, characterized in that: The annular end face of the gear (500) is provided with a circular truncated cone (502) in an annular array, and the circular truncated cone (502) is matched with the pulley (701) and is inserted, and the gear (500) is inlaid with a magnet (503) between the short pins and is attracted to the pulley (701).

6. The multi-functional NC machine tool for a CNC machining center according to claim 1, characterized by: The circular hole (4001) is machined on both sides of the motor seat (400) along the radial direction of the gear (500), the piston (401) and the circular hole (4001) are sealingly and slidingly connected, the circular hole (4001) is sealingly and fixedly connected with the mouth cover (402) away from one end of the gear (500), and the mouth cover (402) is connected with the compressed gas pipe (403).

7. The multi-functional NC machine tool for a CNC machining center according to claim 1, characterized in that: The numerical control motor (700), the motor seat (400) and the accessories assembled on the motor seat (400) are all in the projection range of the sub-disk (300) along the axial direction.

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