A milling cutter device with adjustable machining angle

Abstract

The present application relates to the technical field of milling cutter device, disclose a kind of milling cutter device of adjustable processing angle, including mounting head, installation groove being opened in the end of mounting head, rotary setting in the angle scale of installation groove inside and the chamfering cutter being set in the axial end of angle scale, the inside of installation groove is provided with sealing shell, the inside of sealing shell is provided with adjusting component, the effect of adjusting component is to drive chamfering cutter between preset processing angle Quick switching and positioning;Adjusting component includes angle adjusting assembly being set in the inside of sealing shell and positioning assembly being set on angle adjusting assembly.This device can drive chamfering cutter between preset processing angle Quick switching and positioning, compared with the mode of traditional manual loosening bolt adjustment, effectively improve switching efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of milling cutter devices, and more particularly to a milling cutter device with an adjustable machining angle. Background Technology

[0002] In the intelligent manufacturing equipment industry, milling cutters are widely used tools in the field of metal processing, especially in scenarios such as chamfering, deburring, and precise contour machining of workpieces. Chamfering milling cutters are commonly used accessories and can be used to achieve chamfering treatment of various edges of workpieces at different ratios.

[0003] For reference Figure 1 The adjustable milling cutter device shown includes a mounting head 1, a mounting groove 2, a measuring disc 3, a chamfering cutter 4, and a clamping structure 5, which fixes the chamfering cutter 4 on the mounting head 1. After the mounting head 1 is connected to the spindle, it rotates to perform cutting.

[0004] When it is necessary to switch between different chamfer angles (e.g., 10°, 30°, 45°, 60°, or 80°) to adapt to different parts or process requirements, such as Figure 1 The adjustable milling cutter device shown uses a manual loosening and unloading clamping structure 5. After loosening, the chamfering milling cutter 4 is manually rotated to the approximate angle, and then the positioning is determined by experience or by a protractor. The clamping structure 5 is then tightened again to fix it. This method is cumbersome and inefficient. Moreover, because the bolt tightening force is affected by human intervention, long-term use will lead to unstable tool angle positioning, loosening, and displacement, which will affect the chamfering accuracy and machining quality. In addition, when using manual adjustment, insufficient position repeatability can easily lead to a decrease in machining consistency, which is particularly inconvenient for multi-variety, small-batch and automated tool changing applications. Summary of the Invention

[0005] In view of the problems of cumbersome operation and low efficiency when adjusting the four angles of the chamfering milling cutter in the existing technology, a milling cutter device with adjustable machining angle is proposed.

[0006] This application provides an adjustable milling cutter device, the purpose of which is to provide an adjustable milling cutter device that can achieve rapid switching of multiple angles and precise and stable positioning, so as to meet the efficient chamfering operation under different processing requirements.

[0007] The technical solution of the present invention is as follows: a milling cutter device with adjustable machining angle, comprising a mounting head, a mounting groove formed at the end of the mounting head, a protractor rotatably disposed inside the mounting groove, and a chamfering milling cutter disposed at the axial end of the protractor. A sealing shell is disposed inside the mounting groove, and an adjustment component is disposed inside the sealing shell. The function of the adjustment component is to drive the chamfering milling cutter to quickly switch and position between preset machining angles. The adjustment component includes an angle adjustment assembly disposed inside the sealing shell and a positioning assembly disposed on the angle adjustment assembly. The angle adjustment assembly includes a support plate disposed on the inner wall of the mounting groove, a fixed cylinder detachably mounted on the bottom of the support plate, a movable cylinder elastically mounted on the bottom of the fixed cylinder, a rotating cylinder sleeved on the wall of the movable cylinder, a cavity formed inside the mounting head, and a rotating shaft disposed at the other axial end of the protractor. The bottom of the rotating cylinder and the rotating shaft are both located inside the cavity, and the bottom of the rotating cylinder and the rotating shaft rotate synchronously under the action of a connecting mechanism.

[0008] Furthermore, the connecting mechanism includes a first gear disposed on the bottom wall of the rotating cylinder, a second gear disposed on the wall of the rotating shaft rod, and a connecting chain sleeved on the outer wall of the first gear and the second gear.

[0009] Furthermore, the fixed cylinder includes a receiving groove at the bottom of the fixed cylinder and a plurality of positioning grooves at the bottom of the receiving groove; the movable cylinder includes a tray at the bottom of the fixed cylinder, a wedge on the side of the tray near the fixed cylinder, a movable rod on the side of the tray away from the fixed cylinder, and a straight groove on the wall of the movable rod, wherein the end of the wedge is inclined and adapted to the shape of the inner wall of the positioning groove, and the inner wall of the straight groove slides against the inner wall of the rotating cylinder.

[0010] Furthermore, the angle adjustment assembly also includes a second elastic element sleeved on the outer wall of the movable rod and the rotating cylinder.

[0011] Furthermore, the angle adjustment assembly also includes a control cylinder disposed on the outer wall of the sealing shell and an extrusion groove opened at the bottom of the control cylinder. By rotating the control cylinder, the inner wall of the extrusion groove can extrude the inclined surface of the wedge block, thereby causing the wedge block to descend. Under the action of the inner wall of the extrusion groove and the elastic force of the second elastic element, the wedge block moves to the next positioning groove, realizing rapid switching between preset processing angles. A control plate is disposed at the top of the control cylinder.

[0012] Furthermore, the positioning assembly includes a connecting frame disposed at the bottom of the control cylinder, a guide rod rotatably disposed at the bottom of the connecting frame, a positioning rod disposed at the end of the guide rod away from the connecting frame, multiple positioning holes opened on the bottom surface of the protractor for the positioning rod to be inserted, a through hole opened on the outer wall of the tray for the guide rod to slide, a guide cylinder disposed at the bottom of the rotating cylinder, a guide block disposed on the inner wall of the guide cylinder, a guide groove opened on the wall of the guide rod for the guide block to slide, and a through groove opened on the bottom surface of the mounting head for the guide rod to slide.

[0013] Furthermore, the positioning assembly also includes an extrusion plate disposed on the wall of the control cylinder, a limiting tooth disposed on the outer wall of the extrusion plate, and a limiting plate disposed on the inner wall of the sealing shell for positioning the angle of the limiting tooth.

[0014] Furthermore, the positioning component also includes a first elastic element sleeved on the wall of the control cylinder, and the first elastic element is located between the support plate and the extrusion plate.

[0015] Furthermore, the bottom surface of the support plate is connected to the top of the fixed cylinder by internal and external thread engagement.

[0016] Furthermore, scale lines are provided on both the outer wall of the sealing shell and the inner wall of the mounting groove.

[0017] The beneficial effects of this invention are:

[0018] The angle adjustment component enables rapid switching of preset angles. This component employs a synchronous transmission structure of the first gear, the second gear, and the connecting chain, ensuring that the angle changes of the rotating cylinder and the shaft are completely consistent. Combined with the positioning groove of the fixed cylinder and the wedge of the movable cylinder, it can precisely jump between angles of 10°, 30°, 45°, 60°, and 80°. Single-angle switching is quick, significantly improving efficiency compared to traditional bolt adjustment methods. Different angles can adapt to different scenarios; for example, 10° is suitable for precision components such as electronic pins, 30° for automotive gearbox shafts, 45° for general sheet metal housing processing, 60° for heavy-duty mining components, and 80° for precision bearing processing, achieving multi-functionality and greatly improving the versatility of this device.

[0019] The positioning assembly features a dual locking structure consisting of a positioning rod, positioning hole, limiting teeth, and limiting plate, ensuring stability after angle adjustment. The first elastic element provides preload, maintaining the angle of the chamfering cutter locked in its natural state to prevent accidental activation. During adjustment, the angle can be unlocked simply by overcoming the elastic force of the first elastic element, balancing reliability and convenience. This effectively solves the problems of easy loosening and poor accuracy associated with traditional single positioning pins. Attached Figure Description

[0020] Figure 1 A three-dimensional diagram of the prior art;

[0021] Figure 2 This is an overall perspective view of the present invention;

[0022] Figure 3 This is a schematic diagram showing the location of the through groove in this invention;

[0023] Figure 4 This is a schematic diagram of the installation of the support plate in this invention;

[0024] Figure 5 This is a perspective view of the fixed cylinder in this invention;

[0025] Figure 6 This is a perspective view of the control cylinder in this invention;

[0026] Figure 7 This is a perspective view of the movable cylinder in this invention;

[0027] Figure 8 This is a cross-sectional view of the sealing shell in this invention;

[0028] Figure 9 For the present invention Figure 8 Enlarged view of point A in the middle;

[0029] Figure 10 This is a schematic diagram showing the position of the positioning hole in this invention;

[0030] Figure 11 This is a perspective view of the guide cylinder in this invention;

[0031] Figure 12 This is a schematic diagram showing the state of the chamfering milling cutter after the angle is adjusted to a certain preset machining angle in this invention.

[0032] In the picture:

[0033] 1. Mounting head; 2. Mounting slot; 3. Measuring disc; 4. Chamfering cutter; 5. Clamping structure; 6. Sealing shell; 7. Scale line; 8. Support plate; 9. Fixing cylinder; 10. Receiving slot; 11. Positioning slot; 12. Wedge block; 13. Tray; 14. Movable cylinder; 15. Rotating cylinder; 16. First gear; 17. Rotating shaft; 18. Second gear; 19. Connecting chain; 20. Control cylinder; 21. Extrusion groove; 22. Connecting frame; 23. Conducting rod; 24. Positioning rod; 25. Guide groove; 26. Guide cylinder; 27. Guide block; 28. Positioning hole; 29. ​​Through groove; 30. Extrusion plate; 31. Limiting tooth; 32. Limiting plate; 33. First elastic element; 34. Control plate; 35. Through hole; 36. Movable rod; 37. Straight groove; 38. Cavity; 39. Second elastic element. Detailed Implementation

[0034] 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.

[0035] Example 1, referring to Figures 1-12 The first embodiment of the present invention provides: an adjustable milling cutter device, including a mounting head 1, a mounting groove 2 opened at the end of the mounting head 1, a protractor 3 rotatably mounted inside the mounting groove 2, and a chamfering milling cutter 4 fixedly mounted on the axial end of the protractor 3. A sealing shell 6 is provided inside the mounting groove 2, and an adjustment component is provided inside the sealing shell 6. The function of the adjustment component is to drive the chamfering milling cutter 4 to quickly switch and position between preset machining angles.

[0036] The adjustment components include an angle adjustment assembly disposed inside the sealed housing 6 and a positioning assembly disposed on the angle adjustment assembly.

[0037] The angle adjustment assembly includes a support plate 8 fixedly installed on the inner wall of the mounting groove 2, a fixed cylinder 9 detachably installed on the bottom of the support plate 8, a movable cylinder 14 elastically installed on the bottom of the fixed cylinder 9, a rotating cylinder 15 sleeved on the wall of the movable cylinder 14, a cavity 38 opened inside the mounting head 1, and a rotating shaft 17 fixedly installed on the other axial end of the protractor 3. The bottom of the rotating cylinder 15 and the rotating shaft 17 are both located inside the cavity 38, and the bottom of the rotating cylinder 15 and the rotating shaft 17 rotate synchronously under the action of the connecting mechanism.

[0038] Specifically, the mounting head 1, serving as the basic load-bearing component of the chamfering end mill 4, is integrally cast from high-strength ductile iron. One end connects to external drive equipment, such as a milling machine spindle, via a standardized flange interface. The interface features locating pin holes and high-strength bolt holes, ensuring stable power transmission and improving tool changing efficiency through a quick-assembly and disassembly structure. The internal cavity of the mounting head 1 is precision-machined, providing rigid support for the installation of subsequent components. Simultaneously, its outer wall is designed with reinforcing ribs (not shown in the diagram) to reduce vibration amplitude during high-speed operation and improve machining accuracy. A nitrile rubber sealing ring is added to the mating surface of the sealing shell 6 and the mounting groove 2, forming an IP65-level protective structure that effectively prevents coolant and metal debris generated during machining from intruding into the internal adjustment components.

[0039] Reference Figure 5 The bottom surface of the support plate 8 is connected to the top of the fixed cylinder 9 by internal and external thread engagement.

[0040] Specifically, it should be noted that the fixed cylinder 9 is already in a tightened state when it is rotated and installed. When the angle of the chamfering cutter 4 is adjusted, the rotation direction of the wedge block 12 is the same as the rotation direction of the fixed cylinder 9 during installation. Therefore, the movement of the wedge block 12 will not affect the stability of the fixed cylinder 9.

[0041] Reference Figure 2 Both the outer wall of the sealing shell 6 and the inner wall of the mounting groove 2 are provided with scale lines 7.

[0042] Specifically, the protractor 3 is equipped with indicators corresponding to the scale lines 7. The scale lines 7 are made by laser engraving and are treated with a black coating, which ensures clear readability even in strong light. The angle value can be clearly marked by the scale lines 7 and the indicators, making it easy for operators to observe and verify, and improving the accuracy of angle adjustment.

[0043] Reference Figure 8The connecting mechanism includes a first gear 16 fixedly installed on the bottom wall of the rotating cylinder 15, a second gear 18 fixedly installed on the rod wall of the rotating shaft 17, and a connecting chain 19 sleeved on the outer wall of the first gear 16 and the second gear 18.

[0044] Specifically, the transmission ratio between the rotating cylinder 15 and the rotating shaft 17 is precise, which can ensure the synchronization of the rotating cylinder 15 and the rotating shaft 17. The elastic deformation of the chain can absorb part of the impact load and protect the precision gears. Compared with direct gear meshing, chain drive has a higher tolerance for center distance error and reduces assembly difficulty.

[0045] Reference Figures 4-8 The fixed cylinder 9 includes a receiving groove 10 at the bottom of the fixed cylinder 9 and a plurality of positioning grooves 11 at the bottom of the receiving groove 10; the movable cylinder 14 includes a tray 13 at the bottom of the fixed cylinder 9, a wedge 12 fixedly installed on the side of the tray 13 near the fixed cylinder 9, a movable rod 36 fixedly installed on the side of the tray 13 away from the fixed cylinder 9, and a straight groove 37 on the rod wall of the movable rod 36. The end of the wedge 12 is inclined and is adapted to the inner wall shape of the positioning groove 11. The inner wall of the straight groove 37 slides against the inner wall of the rotating cylinder 15. By locking the end of the wedge 12 inside any one of the positioning grooves 11, the switching between different processing angles can be realized.

[0046] The angle adjustment assembly also includes a second elastic element 39 sleeved on the outer wall of the movable rod 36 and the rotating cylinder 15.

[0047] The angle adjustment assembly also includes a control cylinder 20 disposed on the outer wall of the sealing shell 6 and an extrusion groove 21 opened at the bottom of the control cylinder 20. By rotating the control cylinder 20, the inner wall of the extrusion groove 21 can extrude pressure on the inclined surface of the wedge 12, thereby causing the wedge 12 to descend. When the wedge 12 is disengaged from the receiving groove 10 or one of the positioning grooves 11, the wedge 12 moves to the next positioning groove 11 under the action of the inner wall of the extrusion groove 21 and the elastic force of the second elastic element 39, realizing rapid switching between preset processing angles.

[0048] Specifically, the second elastic element 39 can be a compression spring or a return spring commonly used in the prior art. Here, a compression spring is preferred. In its natural state, the wedge 12 can be tightly pressed into the positioning groove 11 to ensure that the angle positioning is not loose. When the wedge 12 is squeezed down, the second elastic element 39 stores elastic potential energy. When the wedge 12 moves to the next positioning groove 11 position, it can quickly release the elastic force to push the wedge 12 to reset and engage, realizing the automatic reset of the angle switching and reducing human operation error.

[0049] The extrusion groove 21 at the bottom of the control cylinder 20 is an inclined groove. The angle of the inclined surface is complementary to the inclination angle of the wedge block 12. When the control cylinder 20 is rotated, the inclined surface of the extrusion groove 21 can uniformly extrude the wedge block 12 through surface contact, so that the wedge block 12 descends smoothly.

[0050] The angle adjustment component achieves synchronous power transmission through the first gear 16, the second gear 18, and the connecting chain 19, ensuring that the angle changes of the rotating cylinder 15 and the rotating shaft 17 are completely consistent. With the wedge block 12 of the movable cylinder 14 and the positioning groove 11 of the fixed cylinder 9, it can accurately jump between preset angles such as 10°, 30°, 45°, 60°, and 80°. Compared with the traditional method of manually loosening bolts for adjustment, it can effectively improve the switching efficiency.

[0051] A 10° chamfer angle is suitable for precision components such as electronic pins and optical lens barrels, achieving a micro-transition to remove burrs and maintain fitting accuracy; a 30° chamfer angle is suitable for automotive gearbox shafts and hydraulic piston rods, balancing guidance and structural strength, and reducing assembly wear; a 45° chamfer angle, as a general standardized treatment, is applied to sheet metal housings and pipe flanges, facilitating assembly and improving safety; a 60° chamfer angle is suitable for heavy-duty components such as mining gear shafts and bridge anchor bolts, dispersing stress and improving fatigue strength; an 80° chamfer angle is used for high-precision mating parts such as precision bearings and hydraulic servo valves, controlling burrs to ensure fitting accuracy. These angle settings are determined by the positioning groove 11 opened at the bottom of the fixed cylinder 9. The number and angle interval of the positioning grooves 11 correspond one-to-one with the preset 10°, 30°, 45°, 60° and 80°. When the wedge block 12 of the movable cylinder 14 is engaged in different positioning grooves 11, the first gear 16, the second gear 18 and the connecting chain 19 of the connecting mechanism drive the measuring disc 3 to rotate, and finally determine the machining angle of the chamfering cutter 4. The positioning component then assists in locking the angle.

[0052] Reference Figure 8 A control plate 34 is provided at the top of the control cylinder 20.

[0053] Specifically, the control plate 34 makes it easier for operators to press down or rotate the control cylinder 20, improving operational convenience. At the same time, a specially shaped groove, such as a hexagon or a plum blossom shape, can be opened on the side of the control plate 34 away from the control cylinder 20. With the help of specific external tools, the control plate 34 can be moved remotely to prevent the chamfering milling cutter 4 from directly contacting the operator and causing injury before the cutting temperature has dropped. This further improves the ease of use of the device and reduces the risk of accidental activation.

[0054] Example 2, refer to Figures 1-12This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the positioning component includes a connecting frame 22 fixedly installed at the bottom of the control cylinder 20, a transmission rod 23 rotatably installed at the bottom of the connecting frame 22, a positioning rod 24 fixedly installed at the end of the transmission rod 23 away from the connecting frame 22, a plurality of positioning holes 28 opened on the bottom surface of the protractor 3 for the positioning rod 24 to be inserted, a through hole 35 opened on the outer wall of the tray 13 for the transmission rod 23 to slide, a guide cylinder 26 fixedly installed at the bottom of the rotating cylinder 15, a guide block 27 fixedly installed on the inner wall of the guide cylinder 26, a guide groove 25 opened on the wall of the transmission rod 23 for the guide block 27 to slide, and a through groove 29 opened on the bottom surface of the mounting head 1 for the transmission rod 23 to slide.

[0055] The positioning assembly also includes an extrusion plate 30 fixedly installed on the wall of the control cylinder 20, a limiting tooth 31 fixedly installed on the outer wall of the extrusion plate 30, and a limiting plate 32 fixedly installed on the inner wall of the sealing shell 6 to position the angle of the limiting tooth 31.

[0056] The positioning assembly also includes a first elastic element 33 sleeved on the wall of the control cylinder 20, and the first elastic element 33 is located between the support plate 8 and the extrusion plate 30.

[0057] Specifically, the positioning assembly achieves mechanical rigid positioning after angle adjustment through a double locking structure of positioning rod 24, positioning hole 28, limiting tooth 31 and limiting plate 32. The positioning rod 24 and positioning hole 28 have a small fit clearance, and can withstand a certain radial force without displacement after insertion. The meshing depth of limiting tooth 31 and limiting plate 32 can effectively prevent angle drift caused by processing vibration and ensure stable processing accuracy.

[0058] The first elastic element 33 can be a compression spring or a return spring commonly used in the prior art. Here, a compression spring is preferred. The first elastic element 33 keeps the positioning component locked in its natural state to prevent angle changes caused by misoperation. When adjusting, it is only necessary to overcome the elastic force of the first elastic element 33 to unlock it, thus taking into account both positioning reliability and ease of operation.

[0059] Working principle: When using this adjustable milling cutter device, if it is necessary to adjust the machining angle of the chamfering milling cutter 4, the operator first presses down on the control plate 34, which drives the control cylinder 20 and the extrusion plate 30 to move downward. The extrusion plate 30 compresses the first elastic element 33 until the limiting tooth 31 disengages from the limiting plate 32. At the same time, the control cylinder 20 drives the transmission rod 23 to move downward through the connecting frame 22, so that the positioning rod 24 disengages from the positioning hole 28.

[0060] Then, rotate the control plate 34, causing the control cylinder 20 to rotate. The inner wall of the extrusion groove 21 at the bottom of the control cylinder 20 extrudes the inclined surface of the wedge 12, causing the wedge 12 and the tray 13 to move downwards, disengaging the wedge 12 from the current positioning groove 11. At the same time, the tray 13 compresses the second elastic element 39, which stores elastic force. As the control cylinder 20 continues to rotate, guided by the inner wall of the extrusion groove 21, the wedge 12 moves to the next positioning groove 11. Under the elastic force of the second elastic element 39, the tray 13 moves upwards, causing the wedge 12 to engage in the next positioning groove 11. The wedge 12 collides with the inner wall of the positioning groove 11, producing a sound, indicating to the operator that the next preset angle has been successfully adjusted. At this time, the control plate 34 is released.

[0061] Simultaneously, as the control cylinder 20 rotates, the rotating cylinder 15, driven by the straight groove 37, rotates synchronously with the movable cylinder 14. Through the transmission action of the first gear 16, the connecting chain 19, and the second gear 18, the rotating shaft 17 and the measuring disc 3 rotate, thereby driving the chamfering cutter 4 to rotate to the corresponding angle. Under the elastic force of the first elastic element 33, the pressing plate 30 moves upward, causing the limiting tooth 31 to re-mesh with the limiting plate 32, positioning the control cylinder 20. At the same time, the transmission rod 23 moves upward, driving the positioning rod 24 to insert into the corresponding positioning hole 28, positioning the measuring disc 3, and completing the adjustment of the chamfering cutter 4's machining angle.

[0062] Angle adjustment requires only three steps: pressing, rotating, and releasing, resulting in low labor intensity and convenient operation. This allows the chamfering cutter 4 to quickly switch and position between preset machining angles. When the mounting head 1 drives the chamfering cutter 4 to rotate for cutting, the first elastic element 33 and the second elastic element 39, under the action of centrifugal force, further ensure the stability of the engagement between the wedge block 12 and the positioning groove 11.

[0063] 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 milling cutter device with adjustable machining angle, comprising a mounting head (1), a mounting groove (2) formed at the end of the mounting head (1), a protractor (3) rotatably disposed inside the mounting groove (2), and a chamfering cutter (4) disposed at the axial end of the protractor (3), characterized in that, The mounting slot (2) is provided with a sealing shell (6), and the sealing shell (6) is provided with an adjustment component. The function of the adjustment component is to drive the chamfering cutter (4) to quickly switch and position between preset machining angles. The adjustment component includes an angle adjustment assembly disposed inside the sealed housing (6) and a positioning assembly disposed on the angle adjustment assembly; The angle adjustment assembly includes a support plate (8) disposed on the inner wall of the mounting groove (2), a fixed cylinder (9) detachably mounted on the bottom of the support plate (8), a movable cylinder (14) elastically mounted on the bottom of the fixed cylinder (9), a rotating cylinder (15) sleeved on the wall of the movable cylinder (14), a cavity (38) opened inside the mounting head (1), and a rotating shaft (17) disposed on the other axial end of the protractor (3). The bottom of the rotating cylinder (15) and the rotating shaft (17) are both located inside the cavity (38), and the bottom of the rotating cylinder (15) and the rotating shaft (17) rotate synchronously under the action of the connecting mechanism. The fixed cylinder (9) includes a receiving groove (10) opened at the bottom of the fixed cylinder (9) and a plurality of positioning grooves (11) opened at the bottom of the receiving groove (10). The movable cylinder (14) includes a tray (13) disposed at the bottom of the fixed cylinder (9), a wedge (12) disposed on the side of the tray (13) near the fixed cylinder (9), a movable rod (36) disposed on the side of the tray (13) away from the fixed cylinder (9), and a straight groove (37) opened on the wall of the movable rod (36). The end of the wedge (12) is inclined and is adapted to the inner wall shape of the positioning groove (11). The inner wall of the straight groove (37) slides against the inner wall of the rotating cylinder (15). The angle adjustment assembly also includes a second elastic element (39) sleeved on the outer wall of the movable rod (36) and the rotating cylinder (15). The angle adjustment assembly also includes a control cylinder (20) disposed on the outer wall of the sealing shell (6) and an extrusion groove (21) opened at the bottom of the control cylinder (20). By rotating the control cylinder (20), the inner wall of the extrusion groove (21) can extrude the inclined surface of the wedge (12) and thus drive the wedge (12) to descend. Under the action of the inner wall of the extrusion groove (21) and the elastic force of the second elastic element (39), the wedge (12) moves to the next positioning groove (11) to realize the rapid switching between preset processing angles. The top of the control cylinder (20) is provided with a control plate (34); The positioning assembly includes a connecting frame (22) at the bottom of the control cylinder (20), a guide rod (23) rotatably located at the bottom of the connecting frame (22), a positioning rod (24) located at the end of the guide rod (23) away from the connecting frame (22), multiple positioning holes (28) on the bottom surface of the protractor (3) for the positioning rod (24) to be inserted, a through hole (35) on the outer wall of the tray (13) for the guide rod (23) to slide, a guide cylinder (26) at the bottom of the rotating cylinder (15), a guide block (27) on the inner wall of the guide cylinder (26), a guide groove (25) on the rod wall of the guide rod (23) for the guide block (27) to slide, and a through groove (29) on the bottom surface of the mounting head (1) for the guide rod (23) to slide.

2. The milling cutter device with adjustable machining angle according to claim 1, characterized in that: The connecting mechanism includes a first gear (16) disposed on the bottom wall of the rotating cylinder (15), a second gear (18) disposed on the rod wall of the rotating shaft (17), and a connecting chain (19) sleeved on the outer wall of the first gear (16) and the second gear (18).

3. The milling cutter device with adjustable machining angle according to claim 1, characterized in that: The positioning assembly also includes an extrusion plate (30) disposed on the wall of the control cylinder (20), a limiting tooth (31) disposed on the outer wall of the extrusion plate (30), and a limiting plate (32) disposed on the inner wall of the sealing shell (6) to position the angle of the limiting tooth (31).

4. The milling cutter device with adjustable machining angle according to claim 3, characterized in that: The positioning component further includes a first elastic element (33) sleeved on the wall of the control cylinder (20), and the first elastic element (33) is located between the support plate (8) and the extrusion plate (30).

5. The milling cutter device with adjustable machining angle according to claim 1, characterized in that: The bottom surface of the support plate (8) and the top surface of the fixed cylinder (9) are connected by internal and external threads.

6. The milling cutter device with adjustable machining angle according to claim 1, characterized in that: The outer wall of the sealing shell (6) and the inner wall of the mounting groove (2) are both provided with scale lines (7).

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