A multi-functional composite end mill

Abstract

This invention discloses a multifunctional composite milling cutter, relating to the field of milling cutter technology. It includes a tool holder body with a drive motor fixedly installed at its center. A tool holder is detachably mounted on the connecting end of the tool holder body. The outer wall of the tool holder has several tool holder storage slots, and tool holder guide slots are formed within these slots. A sidewall milling cutter has a transmission screw fixedly mounted on the upper wall of its tool holder, and a milling cutting edge is detachably mounted on its lower connecting end. This invention uses a drive motor to rotate the Archimedean spiral guide rail of the threaded sleeve and annular plate, driving the face milling cutter to extend along the tool holder guide slot. The face milling cutter's detachable cutting teeth expand the milling coverage area. This solves the problem that existing composite cutters, due to their one-piece molding, have limited planar milling area and are only suitable for finishing, unable to perform large-scale, large-area roughing, in order to perform both planar and sidewall milling functions.

Description

Technical Field

[0001] This invention relates to the field of milling cutter technology, specifically to a multifunctional composite milling cutter. Background Technology

[0002] Composite milling cutters are specialized cutting tools that integrate multiple types of cutting edges. The cutter body is made of cemented carbide and features a one-piece molded surface milling edge, bevel chamfering edge, and hole wall finishing edge, among other functional structures. They can complete the milling of different surfaces of a workpiece in one operation. They do not require frequent tool changes and can effectively ensure the dimensional coaxiality between multiple machined surfaces. They are suitable for CNC machining scenarios and are widely used in the integrated machining of complex box-shaped and mold parts.

[0003] For example, patent CN209614382U discloses a composite forming tool that integrates planar milling, side milling, chamfering, and deburring. It includes a shank, a transition cone, a neck, and a cutting edge arranged sequentially. The cutting edge has a tapered chamfer section with a gradually increasing radius near the neck end and a cylindrical side milling section connected to the tapered chamfer section at the end away from the neck, with an outer diameter larger than the maximum outer diameter of the tapered chamfer section. A forming edge for chamfering is formed on the edge ligaments of the three helical chip removal grooves on the tapered chamfer section. This composite forming tool integrates the functions of four different cutting tools, offering multi-functionality, versatility, and reduced processing costs.

[0004] However, this type of knife has the following shortcomings:

[0005] Because it is integrally molded, in order to combine the functions of planar milling and sidewall milling, the planar milling area is limited and the milling area is small. It is only suitable for finishing and cannot be used for large-volume roughing.

[0006] The cutting tool is made in one piece, and the whole thing needs to be replaced after the cutting edge or transmission components are worn out, which results in high operating costs. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a multi-functional composite milling cutter, which solves the technical problems of existing devices being integrally formed, which have limited planar milling area and small milling area in order to perform both planar milling and sidewall milling functions, making them only suitable for finishing and unable to perform large-volume, large-area roughing; and the integrally formed cutting tool requiring replacement of the entire tool after wear and tear of the cutting edge or transmission components, resulting in high operating costs.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A multi-functional composite end mill, characterized in that it comprises:

[0010] The main body of the knife handle has a drive motor fixedly installed at its center. A knife holder is detachably installed at the connecting end of the main body of the knife handle. Several knife bar storage slots are opened on the outer side wall of the knife holder, and knife bar guide slots are opened in the knife bar storage slots.

[0011] A sidewall end mill has a transmission screw fixedly installed on the upper wall of its shank and a milling cutting edge detachably installed on the connecting end of its lower wall. A square slider is fixedly installed on the outer wall of the sidewall end mill, and the square slider is located above the milling cutting edge.

[0012] The guide sleeve has a guide through hole that slides and connects with the side wall milling cutter bar. The guide through hole has a positioning cavity that slides and adapts to the square slider. The lower wall of the guide sleeve is detachably connected to the bottom wall of the tool holder.

[0013] A threaded sleeve has its upper wall fixedly connected to the drive end of a drive motor, and its lower end sleeved on the outer wall of a guide sleeve and rotatably connected to the guide sleeve. An annular plate is fixedly installed on the lower outer wall of the threaded sleeve, and an Archimedes spiral guide rail is fixedly installed on the lower wall of the annular plate.

[0014] A face milling cutter has detachable cutting teeth at its head end, which are stored in a cutter shank storage groove. The cutter shank of the face milling cutter has a meshing groove and is slidably adapted to an Archimedes spiral guide rail.

[0015] The inner wall connecting ends of the guide sleeve and the threaded sleeve are all fixedly installed with sealing rings that are sealed to the side wall milling cutter shank. The guide sleeve, the threaded sleeve and the annular plate are all separate parts connected together and fixed in a detachable connection manner.

[0016] Preferably, a retaining ring and several end face teeth are fixedly installed on the upper wall of the tool holder. The several end face teeth are evenly distributed on the outer wall of the retaining ring. The insertion end of the end face teeth is provided with an assembly chamfer. The lower wall connecting end of the tool holder body is provided with a limiting groove that is adapted to the insertion of the retaining ring and the end face teeth. A side wall sealing gasket that fits into the limiting groove is fixedly installed on the upper wall of the retaining ring.

[0017] Preferably, both the end face tooth and the limiting groove are provided with pin holes. When the end face tooth is inserted into the limiting groove, the pin holes provided by the two correspond one-to-one. The outer wall of the tool holder is provided with a stepped threaded hole that communicates with the pin hole. A threaded pin is threadedly connected to the stepped threaded hole. The threaded pin passes through the pin hole provided between the end face tooth and the limiting groove.

[0018] Preferably, the threaded pin is fitted with an auxiliary sealing ring that is compatible with the stepped threaded hole.

[0019] Preferably, the tool holder storage groove is an isosceles trapezoid that is narrower at the top and wider at the bottom, and has a chip removal gap with the side wall of the face milling cutter.

[0020] Preferably, a side wall guide hole is provided between the top wall of the tool holder and the outer wall of the tool holder, and a lower wall guide hole is provided between the tool holder guide groove and the lower wall of the tool holder. A filter screen is fixedly installed between the side wall guide hole and the lower wall guide hole.

[0021] Preferably, the top wall of the guide sleeve is provided with a guide ring groove, and the top wall of the rotating groove in which the threaded sleeve is rotatably adapted to the guide sleeve is fixedly installed with a limiting ring that is slidably connected to the guide ring groove. The outer wall of the threaded sleeve is rotatably connected with a transition limiting sleeve, and the transition limiting sleeve is detachably connected to the inner wall of the tool holder.

[0022] Preferably, the drive motor is a micro servo motor or a stepper motor, and the power supply voltage of the drive motor is 24 volts or 48 volts low-voltage DC.

[0023] Preferably, the end of the tool holder body away from the tool post is provided with a power supply interface and a control signal interface, wherein the power supply interface is used to provide power to the drive motor inside the tool holder body, and the control signal interface is used to establish a signal connection with the CNC system of the machining center.

[0024] Preferably, a wave spring washer is provided at the connection end between the Archimedes spiral guide and the annular plate. The wave spring washer elastically abuts against the meshing groove to compensate for the meshing clearance and ensure the telescopic positioning accuracy of the face milling cutter.

[0025] Beneficial effects

[0026] This invention provides a multifunctional composite end mill with the following advantages:

[0027] The Archimedes spiral guide rail of the threaded sleeve and annular plate is rotated by a drive motor, which drives the face milling cutter to extend along the guide groove of the cutter bar. The face milling cutter head has detachable cutting teeth to expand the milling coverage area. This method solves the problem that existing composite tools, due to their one-piece molding, have a limited planar milling area in order to perform both planar milling and sidewall milling functions. They are only suitable for finishing and cannot be used for large-volume roughing.

[0028] By detachably connecting the tool holder and tool shank, and separately connecting the guide sleeve, threaded sleeve, and annular plate, the side wall milling cutter and face milling cutter cutting edges can be detachably fitted, which solves the problem of existing tools having to be replaced as a whole after tool wear due to being manufactured in one piece, resulting in high usage costs. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0031] Figure 3This is a schematic diagram of the connection structure between the tool holder body and the tool holder of the present invention;

[0032] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0033] Figure 5 This is a schematic diagram of the connection structure of the annular plate and the face milling cutter of the present invention.

[0034] In the diagram: 1. Tool holder body; 2. Drive motor; 3. Tool post; 4. Tool holder storage slot; 5. Tool holder guide slot; 6. Sidewall end mill; 7. Drive screw; 8. Milling cutting edge; 9. Square slider; 10. Guide sleeve; 11. Guide through hole; 12. Positioning cavity; 13. Threaded sleeve; 14. Annular plate; 15. Archimedes spiral guide; 16. Face mill; 17. Cutting teeth; 18. Engaging groove; 19. Closed 20. Sealing ring; 21. Retaining ring; 22. End face teeth; 23. Assembly chamfer; 24. Limiting groove; 25. Side wall sealing gasket; 26. Pin hole; 27. Stepped threaded hole; 28. Threaded pin; 29. ​​Auxiliary sealing ring; 30. Side wall guide hole; 31. Lower wall guide hole; 32. Filter screen; 33. Guide ring groove; 34. Limiting ring; 35. Adapter limiting sleeve; 36. Power supply interface; 37. Control signal interface. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] Please see Figures 1-5 A multi-functional composite milling cutter, comprising:

[0037] The tool holder body 1 has a drive motor 2 fixedly installed at its center. The connecting end of the tool holder body 1 is detachably equipped with a tool holder 3. The outer side wall of the tool holder 3 is provided with several tool bar storage slots 4, and the tool bar storage slots 4 are provided with tool bar guide slots 5.

[0038] The side wall end mill 6 has a transmission screw 7 fixedly installed on the upper wall of its shank, and a milling cutting edge 8 detachably installed on the connecting end of its lower wall. A square slider 9 is fixedly installed on the outer wall of the side wall end mill 6, and the square slider 9 is located above the milling cutting edge 8.

[0039] The guide sleeve 10 has a guide through hole 11 that is slidably connected to the side wall milling cutter 6. The guide through hole 11 has a positioning cavity 12 that is slidably adapted to the square slider 9. The lower wall of the guide sleeve 10 is detachably connected to the bottom wall of the tool holder 3.

[0040] The threaded sleeve 13 has its upper wall fixedly connected to the drive end of the drive motor 2, and its lower end is sleeved on the outer wall of the guide sleeve 10 and rotatably connected to the guide sleeve 10. An annular plate 14 is fixedly installed on the lower outer wall of the threaded sleeve 13, and an Archimedes spiral guide rail 15 is fixedly installed on the lower wall of the annular plate 14.

[0041] The face milling cutter 16 has a detachable tooth 17 at its head end, which is stored in the tool holder storage groove 4. The tool holder of the face milling cutter 16 has a meshing groove 18, which is slidably adapted to the Archimedes spiral guide rail 15.

[0042] The inner wall connecting ends of the guide sleeve 10 and the threaded sleeve 13 are all fixedly installed with sealing rings 19 that are sealed to the side wall milling cutter 6. The guide sleeve 10, the threaded sleeve 13 and the annular plate 14 are all separate parts connected together and are fixed in a detachable connection manner.

[0043] In use, the tool holder body 1 provides the mounting base and holding carrier for the integral milling cutter, and is compatible with the machining center's power spindle; the drive motor 2 provides power to the transmission structure, driving the threaded sleeve 13 to rotate; the tool holder 3 provides storage and mounting support for the side wall milling cutter 6 and the face milling cutter 16, the tool holder storage groove 4 is used to store the face milling cutter 16, and the tool holder guide groove 5 regulates the sliding trajectory of the face milling cutter 16; the side wall milling cutter 6 performs side wall milling operations through the milling cutting edge 8, the transmission screw 7 cooperates with the threaded sleeve 13 to achieve lifting adjustment, the square slider 9 is adapted to the positioning cavity 12 to prevent the side wall milling cutter 6 from rotating and shifting; the guide sleeve 10 passes through... The guide hole 11 provides a lifting guide for the side wall end mill 6, ensuring precise movement. When the threaded sleeve 13 rotates, it drives the transmission screw 7 to lift the side wall end mill 6, and on the other hand, it drives the Archimedes spiral guide rail 15 to rotate through the annular plate 14, driving the face end mill 16 to extend and retract. When the side wall end mill 6 descends, the face end mill 16 retracts. The face end mill 16 performs end milling operations through the cutting teeth 17. The meshing groove 18 is adapted to the Archimedes spiral guide rail 15 to realize extension and retraction adjustment. The sealing ring 19 seals the gap between the guide sleeve 10, the threaded sleeve 13 and the side wall end mill 6 to prevent cutting fluid and iron filings from entering the transmission structure.

[0044] A retaining ring 20 and several end face teeth 21 are fixedly installed on the upper wall of the tool holder 3. The several end face teeth 21 are evenly distributed on the outer wall of the retaining ring 20. The insertion end of the end face teeth 21 is provided with an assembly chamfer 22. The lower wall connecting end of the tool holder body 1 is provided with a limiting groove 23 that is compatible with the insertion of the retaining ring 20 and the end face teeth 21. A side wall sealing gasket 24 that fits into the limiting groove 23 is fixedly installed on the upper wall of the retaining ring 20.

[0045] In use, the chamfer 22 guides the end face teeth 21 to quickly insert into the limiting groove 23, achieving precise docking between the tool holder 3 and the tool shank body 1; the retaining ring 20 fits into the limiting groove 23, restricting the docking position, improving installation accuracy and radial cutting strength; the side wall sealing gasket 24 fills the gap between the retaining ring 20 and the limiting groove 23, enhancing the sealing effect and preventing impurities from entering the connection.

[0046] Both the end face tooth 21 and the limiting groove 23 are provided with pin holes 25. When the end face tooth 21 is inserted into the limiting groove 23, the pin holes 25 of the two correspond one-to-one. The outer wall of the tool holder 3 is provided with a stepped threaded hole 26 that communicates with the pin hole 25. A threaded pin 27 is threadedly connected to the stepped threaded hole 26. The threaded pin 27 passes through the pin hole 25 between the end face tooth 21 and the limiting groove 23.

[0047] An auxiliary sealing ring 28 is fitted on the threaded pin 27 to fit the stepped threaded hole 26.

[0048] In use, the threaded pin 27 passes through the corresponding pin hole 25 to lock and fix the tool holder 3 and the tool holder body 1, preventing the tool holder 3 from loosening during the machining process; the auxiliary sealing ring 28 seals the gap between the threaded pin 27 and the stepped threaded hole 26 to prevent cutting fluid and iron filings from entering the thread structure and to prevent the thread from rusting or getting stuck.

[0049] The tool holder storage groove 4 is an isosceles trapezoid with a narrow top and a wide bottom, and has a chip removal gap with the side wall of the face milling cutter 16.

[0050] A side wall guide hole 29 is provided between the inner top wall of the tool holder 4 and the outer wall of the tool holder 3, and a lower wall guide hole 30 is provided between the tool holder guide groove 5 and the lower wall of the tool holder 3. A filter screen 31 is fixedly installed between the side wall guide hole 29 and the lower wall guide hole 30.

[0051] During use, the isosceles trapezoidal tool holder storage groove 4, combined with the chip removal gap, facilitates the rapid sliding and discharge of cutting chips, preventing them from accumulating in the groove and affecting the extension and retraction of the face milling cutter 16; the side wall guide hole 29 and the lower wall guide hole 30 guide the flow of cutting fluid to cool and lubricate the milling cutter; the filter screen 31 filters out iron chip impurities in the cutting fluid, preventing impurities from entering the transmission structure and wearing parts.

[0052] The top wall of the guide sleeve 10 is provided with a guide ring groove 32. The top wall of the rotating groove of the threaded sleeve 13, which is rotatably adapted to the guide sleeve 10, is fixedly installed with a limiting ring 33 that is slidably connected to the guide ring groove 32. The outer wall of the threaded sleeve 13 is rotatably connected with a transition limiting sleeve 34, which is detachably connected to the inner wall of the tool holder 3.

[0053] In use, the limiting ring 33 and the guide ring groove 32 slide to fit together, limiting the displacement of the threaded sleeve 13 and preventing it from moving around during rotation, thus ensuring transmission stability; the adapter limiting sleeve 34 further fixes the relative position of the threaded sleeve 13 and the tool holder 3, enhancing the overall structural stability and facilitating disassembly and maintenance.

[0054] The drive motor 2 is a micro servo motor or a stepper motor, and the power supply voltage of the drive motor 2 is 24 volts or 48 volts low-voltage DC.

[0055] The end of the tool holder body 1 away from the tool post 3 is provided with a power supply interface 35 and a control signal interface 36. The power supply interface 35 is used to provide power to the drive motor 2 inside the tool holder body 1, and the control signal interface 36 is used to establish a signal connection with the CNC system of the machining center.

[0056] In use, the low-voltage DC power supply motor design enhances operational safety, while the servo / stepper motor ensures precise and controllable power output. The power supply interface 35 supplies power through the rotary wiring channel reserved on the machining center spindle, and the control signal interface 36 interacts with the CNC system to achieve automated and precise control of the lifting of the side wall milling cutter 6 and the extension and retraction of the face milling cutter 16, adapting to the batch automated machining needs of the machining center. This composite tool is installed on the machining center's power spindle through a standard tool holder interface, rotating synchronously with the spindle while remaining relatively stationary. The rotary wiring channel adopts the existing conductive slip ring or a spindle rotation power transmission scheme dominated by a hollow output shaft servo motor.

[0057] A wave spring washer is provided at the connection end between the Archimedes spiral guide 15 and the annular plate 14. The wave spring washer elastically abuts against the meshing groove 18 to compensate for the meshing clearance and ensure the telescopic positioning accuracy of the face milling cutter 16.

[0058] In use, the wave spring washer compensates for the meshing gap between the Archimedes spiral guide 15 and the meshing groove 18 through elastic deformation, preventing the face milling cutter 16 from becoming loose or shifting during positioning, ensuring the face milling cutter 16 is accurately positioned during extension and retraction, and improving the end face milling machining accuracy.

[0059] Example 1: In this example, by linking the retraction of the face milling cutter 16 with the extension of the side wall milling cutter 6, side wall milling can be performed directly after rough machining of the plane without changing the tool, reducing tool change time and adapting to batch rough machining needs.

[0060] Specifically, the tool holder body 1 is installed on the machining center spindle via a standard interface, power is supplied through the power supply interface 35, and the control signal interface 36 is connected to the CNC system. In the initial state, the face mill 16 extends out of the tool holder storage groove 4, the side mill 6 is in the retracted position, and the sealing ring 19 seals the gap between the guide sleeve 10, the threaded sleeve 13 and the side mill 6.

[0061] The machining center is started, and the spindle drives the milling cutter to rotate as a whole. After the rough milling of all the workpiece surfaces is completed, the CNC system sends a command to start the drive motor 2 when the rough milling of the cavity sidewalls of all the workpieces is performed. The drive motor 2 drives the threaded sleeve 13 to rotate. The threaded sleeve 13 slides and adapts to the guide ring groove 32 of the guide sleeve 10 through the limit ring 33 to ensure stable rotation. At the same time, the adapter limit sleeve 34 fixes the relative position of the threaded sleeve 13 and the tool holder 3.

[0062] When the threaded sleeve 13 rotates, the Archimedes spiral guide rail 15 of the lower annular plate 14 rotates synchronously, driving the face milling cutter 16 to retract along the tool holder guide groove 5 through the meshing groove 18 (when the milling cutting edge 8 descends to the maximum depth, the face milling cutter 16 retracts into the tool holder storage groove 4). The wave spring washer compensates for the meshing clearance, ensuring accurate positioning. At the same time, the threaded sleeve 13 meshes with the transmission screw 7 of the side wall milling cutter 6, driving the side wall milling cutter 6 to descend along the guide through hole 11 of the guide sleeve 10, and the square slider 9 slides along the positioning cavity 12 to prevent the side wall milling cutter 6 from rotating and deviating.

[0063] When the milling cutting edge 8 of the side wall milling cutter 6 reaches the preset depth, the drive motor 2 stops, and the machining center drives the milling cutter to perform cavity side wall milling. During the cutting process, the isosceles trapezoidal structure of the tool holder storage groove 4 and the chip removal gap guide the chips out, the side wall guide hole 29 and the lower wall guide hole 30 deliver cutting fluid for cooling and lubrication, and the filter screen 31 filters impurities. After machining is completed, the drive motor 2 reverses, the side wall milling cutter 6 retracts, and the face milling cutter 16 extends, allowing for batch roughing of the next batch of workpieces.

[0064] Example 2: In this example, the tool holder 3 and the tool handle body 1 are connected separately. The guide sleeve 10, the threaded sleeve 13 and the annular plate 14 are all connected separately and fixed in a detachable connection manner to realize the replacement of consumable parts.

[0065] Specifically, when the internal parts of the tool holder 3 are severely worn after prolonged use, the threaded pin 27 on the outer wall of the tool holder 3 can be loosened first, and the auxiliary sealing ring 28 can be removed along with the threaded pin 27, thus releasing the lock between the tool holder 3 and the tool shank body 1. Grasp the tool holder 3 and pull it outward, the end face tooth 21 will disengage from the limiting groove 23, the retaining ring 20 will separate from the side wall sealing gasket 24, and the drive motor 2 will simultaneously disengage from the motor limiting groove inside the tool shank body 1. The elastic conductive contact at the power connection end of the motor limiting groove will naturally disconnect from the motor conductive contact surface at the power connection end of the drive motor 2 (existing technology of elastic conductive contact type can be used to ensure continuous power supply under cutting vibration). At the same time, the tool holder 3 will also drive the guide sleeve 10, threaded sleeve 13, side wall end mill 6, and face end mill 16 to disengage from the tool shank body 1 as a whole.

[0066] After that, disassemble the threaded sleeve 13 and then disassemble the guide sleeve 10 from the tool holder 3. Finally, disassemble the guide sleeve 10 to replace the consumable parts. After replacing the consumable parts, reset them in reverse order as described above.

[0067] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multifunctional composite end mill, characterized in that, include: The main body of the knife handle (1) has a drive motor (2) fixedly installed at its center. The connecting end of the main body of the knife handle (1) is detachably equipped with a knife holder (3). The outer side wall of the knife holder (3) is provided with several knife bar storage slots (4). The knife bar storage slots (4) are provided with knife bar guide slots (5). A sidewall milling cutter (6) has a transmission screw (7) fixedly installed on the upper wall of its cutter shank, and a milling cutting edge (8) detachably installed on the connecting end of its lower wall. A square slider (9) is fixedly installed on the outer wall of the sidewall milling cutter (6), and the square slider (9) is located above the milling cutting edge (8). The guide sleeve (10) has a guide through hole (11) that is slidably connected to the side wall milling cutter (6). The guide through hole (11) has a positioning cavity (12) that is slidably adapted to the square slider (9). The lower wall of the guide sleeve (10) is detachably connected to the bottom wall of the tool holder (3). The threaded sleeve (13) has its upper wall fixedly connected to the drive end of the drive motor (2), and its lower end is sleeved on the outer wall of the guide sleeve (10) and rotatably connected to the guide sleeve (10). The lower outer wall of the threaded sleeve (13) is fixedly installed with an annular plate (14), and the lower wall of the annular plate (14) is fixedly installed with an Archimedes spiral guide rail (15). The face milling cutter (16) has a detachable tooth (17) at its head end, which is stored in the tool holder storage groove (4). The tool holder of the face milling cutter (16) has a meshing groove (18) and is slidably adapted to the Archimedes spiral guide rail (15). The inner wall connecting ends of the guide sleeve (10) and the threaded sleeve (13) are all fixedly installed with sealing rings (19) that are sealed to the side wall milling cutter (6) shank. The guide sleeve (10), the threaded sleeve (13) and the annular plate (14) are all separate parts connected and fixed in a detachable connection manner. When the threaded sleeve (13) rotates, it drives the transmission screw (7) to drive the side wall milling cutter (6) to rise and fall. On the other hand, it drives the Archimedes spiral guide rail (15) to rotate through the annular plate (14), driving the face milling cutter (16) to extend and retract. When the side wall milling cutter (6) descends, the face milling cutter (16) retracts.

2. The multifunctional composite end mill according to claim 1, characterized in that, The upper wall of the tool holder (3) is fixedly installed with a retaining ring (20) and a number of end face teeth (21). The number of end face teeth (21) are evenly distributed on the outer wall of the retaining ring (20). The insertion end of the end face teeth (21) is provided with an assembly chamfer (22). The lower wall connection end of the tool holder body (1) is provided with a limiting groove (23) that is compatible with the insertion of the retaining ring (20) and the end face teeth (21). The upper wall of the retaining ring (20) is fixedly installed with a side wall sealing gasket (24) that fits the limiting groove (23).

3. A multifunctional composite end mill according to claim 2, characterized in that, Both the end face tooth (21) and the limiting groove (23) are provided with pin holes (25). When the end face tooth (21) is inserted into the limiting groove (23), the pin holes (25) of the two correspond one-to-one. The outer wall of the tool holder (3) is provided with a stepped threaded hole (26) that communicates with the pin hole (25). The stepped threaded hole (26) is internally threaded with a threaded pin (27). The threaded pin (27) passes through the pin hole (25) between the end face tooth (21) and the limiting groove (23).

4. A multifunctional composite milling cutter according to claim 3, characterized in that, An auxiliary sealing ring (28) adapted to the stepped threaded hole (26) is fitted on the threaded pin (27).

5. A multifunctional composite end mill according to claim 4, characterized in that, The tool holder storage groove (4) is an isosceles trapezoid with a narrow top and a wide bottom, and has a chip removal gap with the side wall of the face milling cutter (16).

6. A multifunctional composite milling cutter according to claim 1, characterized in that, A side wall guide hole (29) is provided between the inner top wall of the tool holder (4) and the outer wall of the tool holder (3). A lower wall guide hole (30) is provided between the tool holder guide groove (5) and the lower wall of the tool holder (3). A filter screen (31) is fixedly installed between the side wall guide hole (29) and the lower wall guide hole (30).

7. A multifunctional composite end mill according to claim 1, characterized in that, The top wall of the guide sleeve (10) is provided with a guide ring groove (32). The top wall of the rotating groove of the threaded sleeve (13) which is rotatably adapted to the guide sleeve (10) is fixedly installed with a limiting ring (33) which is slidably connected to the guide ring groove (32). The outer wall of the threaded sleeve (13) is rotatably connected with a transition limiting sleeve (34). The transition limiting sleeve (34) is detachably connected to the inner wall of the tool holder (3).

8. A multifunctional composite milling cutter according to claim 1, characterized in that, The drive motor (2) is a micro servo motor or a stepper motor, and the power supply voltage of the drive motor (2) is 24 volts or 48 volts low-voltage DC.

9. A multifunctional composite milling cutter according to claim 1, characterized in that, The tool holder body (1) is provided with a power supply interface (35) and a control signal interface (36) at one end away from the tool holder (3). The power supply interface (35) is used to provide power to the drive motor (2) inside the tool holder body (1), and the control signal interface (36) is used to establish a signal connection with the CNC system of the machining center.

10. A multifunctional composite end mill according to claim 1, characterized in that, The connection end between the Archimedes spiral guide rail (15) and the annular plate (14) is provided with a wave spring washer. The wave spring washer elastically abuts against the meshing groove (18) to compensate for the meshing gap and ensure the telescopic positioning accuracy of the face milling cutter (16).

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