Multi-surface cutting machine tool

Abstract

The invention relates to a multi-face cutting machine tool which comprises a machine tool body, a power cutting machine head and a workpiece device machine head, a cutting fly cutter disc is arranged on the power cutting machine head, a universal linkage transmission device is arranged between the cutting fly cutter disc and the workpiece device machine head, and the universal linkage transmission device is composed of an input shaft part, a middle shaft part and an output shaft part; the input shaft part comprises a universal joint arranged in the center of the cutting fly cutter disc, and a driving gear is fixed on the universal joint; the middle shaft part comprises a middle gear, the output shaft part comprises a driven gear, and the driving gear, the middle gear and the driven gear are meshed with one another. A universal linkage transmission device is additionally arranged between a cutting fly cutter disc and a workpiece device machine head, so that when hexagonal surfaces with different diameters are cut on the same workpiece, the relative positions of a driving gear, a middle gear and a driven gear on a fixed plate and the workpiece to be machined are kept unchanged; therefore, the concentricity of the two sections of cut hexagonal surfaces is not deviated and misplaced, and the precision is high.

Description

Technical Field

[0001] The invention relates to the technical field of instrument lathes, in particular to a multi-faceted cutting machine tool. Background Art

[0002] At present, the processing of multi-faceted parts and products such as octagonal, hexagonal, square or double-plane shapes by machine tools must be completed in milling. Processing workpieces in this way is often complicated, slow, and inefficient. It also requires high operating skills of the operators. It is difficult for different operators or the same operator to obtain uniform specifications for the quality of the processed workpieces, resulting in poor precision of the processed workpieces, and bringing greater labor intensity and low production efficiency.

[0003] China Patent Publication (Announcement) No.: CN2663079Y, Patent Title: High-speed Precision Multi-surface Cutting Machine Tool, which discloses "a high-speed precision multi-surface cutting machine tool designed by the present invention, which comprises a bed, a power cutting machine head and a workpiece device machine head, a cutting disc is arranged on the power cutting machine head, a workpiece chuck is arranged on the workpiece device machine head, a universal linkage transmission device is arranged between the cutting disc and the workpiece chuck, the cutting edge of the cutting disc is parallel to the cutting plane; the cutting disc is provided with one to eight cutting tools; according to different symmetry requirements of the cutting surface, the cutting tools on the cutting disc can be arranged in parallel. The universal joint transmission device includes a linkage gear on the central connecting shaft of the cutting cutter disc, a spindle gear on the central spindle of the workpiece chuck, a bridge adjustment gear meshingly connected between the linkage gear and the spindle gear, and a relative displacement device between the linkage gear and the spindle gear; the power cutting machine head and the workpiece device machine head are arranged at both ends of the bed, and the cutting cutter disc and the workpiece chuck are in a relative axial offset position. The power motor can drive the central connecting shaft of the cutting cutter disc, and can also drive the central spindle of the workpiece chuck. "Technical solution.

[0004] The technical effect of "a high-speed precision multi-faceted cutting machine tool obtained by the present invention can realize multi-plane cutting in the process of rotational motion of the workpiece and the tool, thereby completing multi-angle surface processing on the circumferential surface during one feed process, and obtaining multi-angle and multi-faceted processed products, especially for multi-angle and multi-faceted workpieces such as octagonal, hexagonal, square or double-plane, can increase the production efficiency by more than 10 times compared with the original traditional milling processing, and it has very positive practical significance for the reform of traditional processing technology, improving product quality and processing speed, and reducing processing costs" has been achieved.

[0005] In practical applications, it is often necessary to perform chamfering on the machined end face of the workpiece (for example, the two end faces of a hexagonal cylinder) to remove burrs on the parts caused by machining and facilitate assembly of the parts. When the above-mentioned high-speed precision multi-faceted cutting machine is used to machine chamfers, since its gear linkage device is a flexible structure (that is, its bridge adjustment gear can be moved up and down), the linkage gear (driving wheel) is rigidly connected to the machine head and cannot move. When the X-axis moves, the bridge adjustment gear moves upward, and the spindle gear (driven wheel) will rotate a certain angle, causing the relative position of the linkage gear and the spindle gear to change. When cutting hexagonal surfaces of different diameters on the same workpiece (the turning tool needs to move when cutting chamfers), the coaxiality of the two cut hexagonal surfaces will deviate, resulting in chamfer distortion and misalignment (see Fig.10 ).

[0006] For example, when processing a pagoda-shaped hexagonal shaft (stepped shaft), there is also a phenomenon that the small head and the large head are twisted and misaligned with each other (see Fig.11 ).

[0007] So improvements are needed. Summary of the invention

[0008] The object of the present invention is to provide a multi-faceted cutting machine tool to solve the problems raised in the above-mentioned background technology.

[0009] In order to solve the above technical problems, the present invention is achieved through the following technical measures: a multi-faceted cutting machine tool, including a bed as a basis, a power cutting head and a workpiece device head fixed on the bed, characterized in that: a cutting fly cutter disc is provided on the power cutting head, a universal joint transmission device is provided between the cutting fly cutter disc and the workpiece device head, and the universal joint transmission device is composed of an input shaft, an intermediate shaft, and an output shaft; the input shaft includes a tool holder arranged on the cutting fly cutter disc, a turning tool is arranged on the tool holder, a universal joint is arranged at the center of the cutting fly cutter disc, and the other end of the universal joint It is movably sleeved on a fixed plate connected and fixed to the bed, and a driving gear is fixed on the universal joint; the intermediate shaft portion includes an intermediate gear, and the intermediate gear is installed on the central shaft of the intermediate shaft portion through a first rolling bearing, and the central shaft of the intermediate shaft portion is installed on the fixed plate through a locking bolt; the output shaft portion includes a passive gear, and the passive gear is fixedly connected to the central shaft of the output shaft portion through a flat key, and the central shaft of the output shaft portion is installed and connected to the fixed plate through a second rolling bearing, and the central shaft of the output shaft portion is installed and connected with a three-jaw chuck for fixing a workpiece to be processed; the driving gear, the intermediate gear and the passive gear are meshed with each other.

[0010] Compared with the prior art, the advantages of the present invention are: by adding a universal linkage transmission device between the cutting fly cutter disc and the workpiece device head, when cutting hexagonal surfaces of different diameters on the same workpiece, the workpiece to be processed needs to be moved forward in the direction of the turning tool (after the large head is cut, it needs to be moved forward when preparing to cut the small head). Since the power cutting head is connected to the universal joint (it can move forward synchronously to compensate for the displacement), the relative positions of the active gear, the intermediate gear, and the passive gear on the fixed plate and the workpiece to be processed will always remain unchanged (in the prior art, this position will change, please refer to Figure 5 ). Therefore, the concentricity of the two hexagonal surfaces cut out will not produce deviation or dislocation, and the precision is high.

[0011] As an improvement of the present invention, one end of the universal joint is a six-tooth spline shaft. The purpose of selecting this design is that the six-tooth spline shaft can transmit mechanical torque. There are six longitudinal tooth-shaped keyways on the surface of the six-tooth spline shaft, and the rotating part sleeved on the shaft also has corresponding keyways, which can keep rotating synchronously with the shaft. Moreover, while rotating, it can also slide longitudinally on the shaft.

[0012] As an improvement of the present invention, the six-tooth spline shaft is sleeved with an input shaft synchronizing sleeve, and the input shaft synchronizing sleeve is fixedly connected to the driving gear through a flat key. The purpose of selecting this design is to achieve a fixed connection between the six-tooth spline shaft, the input shaft synchronizing sleeve and the driving gear, and to synchronously transmit the rotation of the six-tooth spline shaft (a part of the universal joint) to the driving gear.

[0013] As an improvement of the present invention, a rear cover is arranged at one end of the intermediate gear, and then is threadedly connected and fixed with the central axis of the intermediate shaft portion by a locking nut. The purpose of selecting this design is that the cooperation between the rear cover and the locking nut prevents the lateral displacement of the intermediate gear.

[0014] As an improvement of the present invention, a flat keyway is provided on the central axis of the output shaft. The purpose of selecting this design is to install a flat key on the flat keyway to achieve a fixed connection between the central axis of the output shaft and the driven gear.

[0015] As an improvement of the present invention, the input shaft synchronous sleeve is mounted on the fixed plate via a third rolling bearing. The purpose of selecting this design is to enable the input shaft synchronous sleeve to be rotatably mounted on the fixed plate.

[0016] As an improvement of the present invention, the tail end of the six-tooth spline shaft is sleeved in the bearing seat. The purpose of selecting this design is to increase the concentricity of the six-tooth spline shaft and prevent it from shaking.

[0017] As an improvement of the present invention, an inner hexagonal spline groove is provided on the inner diameter wall of the input shaft synchronous sleeve. The purpose of selecting this design is that the inner hexagonal spline groove matches the outer hexagonal spline of the six-tooth spline shaft to achieve synchronous rotation of the input shaft synchronous sleeve and the six-tooth spline shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] In the attached picture:

[0020] Figure 1 It is a stereoscopic diagram of the universal joint transmission device described in the present invention.

[0021] Figure 2 The figure is an exploded view of the universal joint transmission device described in the present invention.

[0022] Figure 3 The input shaft of the present invention is a three-dimensional Figure 1 .

[0023] Figure 4 The input shaft of the present invention is a three-dimensional Figure 2 .

[0024] Figure 5 It is a schematic diagram of the gear linkage device in the prior art described in the present invention.

[0025] Figure 6 It is a three-dimensional diagram of the multi-faceted cutting machine tool described in the present invention.

[0026] Figure 7 It is an exploded view of the intermediate shaft portion of the present invention.

[0027] Figure 8 It is an exploded view of the output shaft portion of the present invention.

[0028] Fig. 9 It is a stereoscopic view of the six-tooth spline shaft described in the present invention.

[0029] Fig.10 This is a comparison diagram between the standard chamfer and the offset chamfer described in the present invention.

[0030] Fig.11 It is a comparison diagram between the standard pagoda-type hexagonal shaft and the offset pagoda-type hexagonal shaft described in the present invention.

[0031] Fig.12 It is a stereoscopic view of the synchronous sleeve of the input shaft according to the present invention.

[0032] Fig.13Schematic diagram of the transmission belt structure of the present invention.

[0033] Explanation of the reference numerals: 1. bed; 2. power cutting machine head; 3. workpiece device machine head; 4. cutting fly cutter disc; 5. universal linkage transmission device; 6. tool holder; 7. turning tool; 8. universal joint; 9. fixing plate; 10. driving gear; 11. intermediate gear; 12. first rolling bearing; 13. central axis of the intermediate shaft; 14. locking bolt; 15. driven gear; 16. central axis of the output shaft; 17. second rolling bearing; 18. workpiece to be processed; 19. three-jaw chuck; 20. six-tooth flower Key shaft; 21. Input shaft synchronous sleeve; 22. Rear cover; 23. Locking nut; 24. Flat keyway; 25. Third rolling bearing; 26. Bearing seat; 27. Internal hexagonal spline groove; 28. X-axis servo motor; 29. ​​Fixed plate; 30. Interlocking gear; 31. Bridge adjustment gear; 32. Main shaft gear; 33. Universal head; 34. Shaft; 35. Hexagonal cylinder; 36. Chamfer; 37. Small head; 38. Big head; 39. Transmission belt; 40. First synchronous wheel; 41. Second synchronous wheel. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0035] Example 1

[0036] Please refer to Figure 1-13 .

[0037] The multi-faceted cutting machine tool provided in this embodiment includes a bed 1 as a basis, a power cutting machine head 2 and a workpiece device machine head 3 fixed on the bed 1, a cutting fly cutter disc 4 is provided on the power cutting machine head 2, and a universal linkage transmission device 5 is provided between the cutting fly cutter disc 4 and the workpiece device machine head 3 (please refer to Figure 6 ).

[0038] In the embodiments of the present invention, please refer to Figure 2 The universal joint transmission device 5 is composed of an input shaft, an intermediate shaft, and an output shaft. Figure 2 The intermediate shaft portion is a component in the upper area of ​​the fixing plate 9 , the intermediate shaft portion is a component in the middle area of ​​the fixing plate 9 , and the output shaft portion is a component in the bottom area of ​​the fixing plate 9 .

[0039] In the embodiments of the present invention, please refer to Figure 2 , Figure 3 and Figure 4The input shaft portion includes a tool holder 6 disposed on the cutting cutter disc 4, a turning tool 7 is disposed on the tool holder 6, a universal joint 8 is disposed at the center of the cutting cutter disc 4, the other end of the universal joint 8 is movably sleeved on a fixing plate 9 connected and fixed to the bed 1, and a driving gear 10 is fixed on the universal joint 8.

[0040] For further information, please refer to Figure 4 and Fig. 9 One end of the universal joint 8 is a six-tooth spline shaft 20, which is composed of a universal head 33 and a shaft 34. The six-tooth spline shaft 20 can transmit mechanical torque. There are six longitudinal tooth-shaped keyways on the surface of the six-tooth spline shaft 20, and the rotating part sleeved on the shaft also has corresponding keyways, which can keep rotating synchronously with the shaft. And while rotating, it can also slide longitudinally on the shaft.

[0041] For further information, please refer to Figure 2 The six-tooth spline shaft 20 is sleeved with an input shaft synchronizing sleeve 21, and the input shaft synchronizing sleeve 21 is fixedly connected to the driving gear 10 via a flat key. This structure can achieve a fixed connection between the six-tooth spline shaft 20, the input shaft synchronizing sleeve 21 and the driving gear 10, and synchronously transmit the rotation of the six-tooth spline shaft 20 (a part of the universal joint 8) to the driving gear 10.

[0042] Furthermore, the input shaft synchronous sleeve 21 is installed in the fixed disk 29 through the third rolling bearing 25, and the fixed disk 29 is then installed on the fixed plate 9 by a plurality of bolts.

[0043] Furthermore, the tail end of the six-tooth spline shaft 20 is sleeved in the bearing seat 26. This structure can increase the concentricity of the six-tooth spline shaft 20 without shaking.

[0044] Furthermore, an inner diameter wall of the input shaft synchronous sleeve 21 is provided with an inner hexagonal spline groove 27. The inner hexagonal spline groove 27 matches the outer hexagonal spline of the six-tooth spline shaft 20 to achieve synchronous rotation of the input shaft synchronous sleeve 21 and the six-tooth spline shaft 20.

[0045] In the embodiments of the present invention, please refer to Figure 7 The intermediate shaft portion includes an intermediate gear 11 , and the intermediate gear 11 is mounted on an intermediate shaft portion center shaft 13 via a first rolling bearing 12 , and the intermediate shaft portion center shaft 13 is mounted on the fixing plate 9 via a locking bolt 14 .

[0046] For further information, please refer to Figure 7The middle gear 11 is provided with a rear cover 22 at one end, which is then threadedly connected and fixed to the middle shaft center shaft 13 by a locking nut 23. The purpose of selecting this design is that the rear cover 22 cooperates with the locking nut 23 to prevent the middle gear 11 from lateral displacement.

[0047] In the embodiments of the present invention, please refer to Figure 8 The output shaft portion includes a passive gear 15, which is fixedly connected to the output shaft portion center shaft 16 via a flat key, and the output shaft portion center shaft 16 is installed and connected to the fixed plate 9 via a second rolling bearing 17, and the output shaft portion center shaft 16 is installed and connected with a three-jaw chuck 19 for fixing a workpiece 18 to be processed.

[0048] Furthermore, a flat keyway 24 is provided on the output shaft central axis 16 . A flat key is installed on the flat keyway 24 to achieve a fixed connection between the output shaft central axis 16 and the driven gear 15 .

[0049] Take the processing of pagoda-shaped hexagonal stepped shaft as an example, please refer to Figure 1 , three turning tools 7 are installed on the cutting fly cutter disc 4, the power cutting machine head 2 rotates, driving the universal joint 8 to rotate synchronously, the driving gear 10 on the universal joint 8 rotates, driving the intermediate gear 11 and the passive gear 15 to rotate. Due to the setting of the intermediate gear 11, the speed of the passive gear 15 is the same as that of the driving gear 10, but in the opposite direction. The passive gear 15 drives the three-jaw chuck 19 to rotate through the workpiece device machine head 3, so that the turning tool 7 performs cutting processing on the workpiece 18 to be processed.

[0050] When the hexagonal surface on the big head of the pagoda-shaped hexagonal stepped shaft is cut, the workpiece device head 3, driven by the X-direction servo motor 28, moves the workpiece 18 to be processed forward in the direction of the turning tool 7 (to prepare for processing the small head 37). Since the universal joint 8 (which can compensate for displacement) is connected to the power cutting head 2, the driving gear 10, the intermediate gear 11, and the driven gear 15 on the fixed plate 9 always remain in relative position with the workpiece 18 to be processed (in the prior art, this position will change, please refer to Figure 5 ).

[0051] From the attached Figure 5It can be seen that, for the original three gears, when the workpiece device head 3 moves telescopically in the X direction, the movement of the middle adjusting wheel will cause the passive wheel to rotate a certain angle (because the two are always in a meshing state), thereby changing the position. In the prior art, only one hexagonal surface is processed on the hexagonal cylinder 35 (only one large head is processed, in which case the workpiece 18 to be processed does not need to be moved), so the workpiece device head 3 is fixed. If a second hexagonal surface is to be processed (that is, another small head 37 is processed to form a stepped shaft shape with the large head), the position of the passive wheel will rotate a certain angle, and thus the workpiece 18 to be processed will also rotate a certain angle synchronously, causing the relative position of the turning tool 7 and the workpiece 18 to be processed to change, that is, the position of the lower cutter changes, which will cause distortion and misalignment (see Fig.11 ).

[0052] The three gears of the driving gear 10, the intermediate gear 11 and the driven gear 15 on the fixed plate 9 are meshed with each other and can only rotate but cannot move left, right or up or down. When cutting surfaces of different diameters are to be processed, driven by the X-direction servo motor 28, the compensation displacement of the universal joint 8 connected to the power cutting head 2 is realized, and the relative position of the turning tool 7 and the workpiece 18 to be processed will not change, and the concentricity of the two hexagonal surfaces is consistent, so there will be no misalignment, and the precision is high.

[0053] In the prior art, when such a multi-faceted cutting machine tool is used to process the chamfer 36 of a hexagonal cylinder 35 (i.e., when processing a pagoda-type hexagonal shaft), since its gear linkage device is a flexible structure (i.e., its bridge adjustment gear 31 is movable up and down), the linkage gear 30 (equivalent to the driving wheel) is rigidly connected to the machine head and cannot move. When moving in the X direction, the bridge adjustment gear 31 moves upward, and the main shaft gear 32 (equivalent to the driven wheel) rotates a certain angle, causing the relative position of the linkage gear 30 and the main shaft gear 32 to change. When cutting hexagonal surfaces of different diameters on the same workpiece (when cutting chamfers, the turning tool needs to move), the coaxiality of the two cut hexagonal surfaces (large head 38 and small head 37) will deviate, resulting in chamfer distortion and misalignment (see Fig.11 ).

[0054] It should be noted that the driving gear 10, the intermediate gear 11 and the driven gear 15 of the universal linkage transmission device 5 are meshed with each other to transmit the power torque. The gear transmission structure can also be replaced by a transmission belt structure in the prior art. Please refer to Fig.13 , that is, the driving gear 10 is replaced by the first synchronous wheel 40, and the passive gear 15 is replaced by the second synchronous wheel 41, and the transmission is transmitted through the transmission belt 39, and the intermediate gear 11 and other parts are omitted, and the rotation direction is the same as the gear transmission structure. The speed ratio can be achieved by the size of the two synchronous wheels.

[0055] The cutting fly cutter disc 4 is generally provided with one to eight turning tools 7, but the number of tools can be selected according to the processing surface needs (usually one tool is used for 2 surfaces, and it can be increased arbitrarily). For example, if 16 surfaces are processed, 8 turning tools are required.

[0056] Different numbers of cut surfaces can be achieved under different speed ratios between the workpiece device head 3 and the cutting fly cutter disc 4. The speed ratio is determined by the number of teeth of the active gear 10 and the passive gear 15. Usually, the gear ratio is 1:2, which means that one cutter can make two surfaces. If the gear ratio is 1:3, one cutter can make three surfaces, two cutters can make six surfaces, and three cutters can make nine surfaces.

[0057] The universal linkage transmission device 5 adopting the transmission belt structure has a speed ratio determined by the circumference of the two synchronous wheels. These are prior arts and will not be described in detail here.

[0058] The beneficial effect of the present invention is that by adding a universal linkage transmission device 5 between the cutting fly cutter disc 4 and the workpiece device head 3, when cutting hexagonal surfaces of different diameters on the same workpiece, the workpiece 18 to be processed needs to be moved forward in the direction of the turning tool 7 (the large head 38 is cut and it is necessary to move forward when preparing to cut the small head 37). Since the universal joint 8 is connected to the power cutting head 2 (it can move forward synchronously to compensate for the displacement), the driving gear 10, the intermediate gear 11, and the driven gear 15 on the fixed plate 9 always remain in relative position with the workpiece 18 to be processed (in the prior art, this position will change, please refer to Figure 5 ). Therefore, the concentricity of the two hexagonal surfaces cut out will not produce deviation or dislocation, and the precision is high, thereby improving production efficiency.

[0059] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0060] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-faceted cutting machine tool, comprising a bed (1) as a basis, a power cutting head (2) and a workpiece device head (3) fixed on the bed (1), wherein: The power cutting machine head (2) is provided with a cutting cutter disc (4), and a universal linkage transmission device (5) is provided between the cutting cutter disc (4) and the workpiece device head (3), and the universal linkage transmission device (5) is composed of an input shaft, an intermediate shaft, and an output shaft; the input shaft includes a tool holder (6) arranged on the cutting cutter disc (4), and a turning tool (7) is arranged on the tool holder (6); a universal joint (8) is arranged at the center of the cutting cutter disc (4), and the other end of the universal joint (8) can be movably sleeved on a fixed plate (9) connected and fixed to the bed (1), and a driving gear (10) is fixed on the universal joint (8); the intermediate shaft includes an intermediate gear (11), the intermediate gear (11) is mounted on the central shaft (13) of the intermediate shaft portion through a first rolling bearing (12), and the central shaft (13) of the intermediate shaft portion is mounted on the fixing plate (9) through a locking bolt (14); the output shaft portion includes a passive gear (15), the passive gear (15) is fixedly connected to the central shaft (16) of the output shaft portion through a flat key, the central shaft (16) of the output shaft portion is mounted and connected to the fixing plate (9) through a second rolling bearing (17), and the central shaft (16) of the output shaft portion is mounted and connected with a three-jaw chuck (19) for fixing a workpiece (18) to be processed; the driving gear (10), the intermediate gear (11) and the passive gear (15) are meshed with each other.

2. The multi-faceted cutting machine tool according to claim 1, characterized in that: One end of the universal joint (8) is a six-tooth spline shaft (20).

3. The multi-faceted cutting machine tool according to claim 1, characterized in that: An input shaft synchronizing sleeve (21) is sleeved on the six-tooth spline shaft (20), and the input shaft synchronizing sleeve (21) is fixedly connected to the driving gear (10) via a flat key.

4. The multi-faceted cutting machine tool according to claim 1, characterized in that: A rear cover (22) is disposed at one end of the intermediate gear (11), and is threadedly connected and fixed to the central shaft (13) of the intermediate shaft portion by a locking nut (23).

5. The multi-faceted cutting machine tool according to claim 1, characterized in that: A flat keyway (24) is provided on the central axis (16) of the output shaft portion.

6. The multi-faceted cutting machine tool according to claim 1, characterized in that: The input shaft synchronous sleeve (21) is installed in the fixed disk (29) through a third rolling bearing (25), and the fixed disk (29) is then installed on the fixed plate (9) by bolts.

7. The multi-faceted cutting machine tool according to claim 2, characterized in that: The tail end of the six-tooth spline shaft (20) is sleeved in the bearing seat (26).

8. The multi-faceted cutting machine tool according to claim 3, characterized in that: An inner diameter wall of the input shaft synchronous sleeve (21) is provided with an inner hexagonal spline groove (27).

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