A cutting device, apparatus and method with adjustable blade angle

Abstract

This invention discloses a cutting device, equipment, and method with adjustable cutting edge angle, relating to the field of cutting technology. It solves the problem of fixed and non-adjustable cutting edge angle of existing beveling machine milling cutter heads, and has the beneficial effects of adjustable blade cutting edge and high tool changing efficiency. The specific solution is as follows: A cutting device with adjustable cutting edge angle includes a cutter head assembly, comprising a cutter head positioned circumferentially on a connecting shaft. The cutter head is detachably connected to the beveling machine spindle via the connecting shaft. Multiple tool holders are rotatably mounted on the circumference of the cutter head, with the central axis of the tool holders perpendicular to the central axis of the cutter head. Cutting blades are mounted on the tool holders. A first input shaft and a second input shaft are circumferentially sleeved on the connecting shaft. An angle locking mechanism includes an indexing assembly disposed between the cutter head and the tool holders. The indexing assembly includes an indexing ring with a first indexing groove on its circumference. A positioning spring-loaded assembly is positioned in the hollow part of the indexing ring to lock the tool holders at a preset angle position. An angle adjustment drive mechanism is also included.

Description

Technical Field

[0001] This invention relates to the field of metal cutting equipment technology, and in particular to a cutting device, equipment and method with adjustable cutting edge angle. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Beveling machines are widely used in the manufacture of pipes, pressure vessels, and steel structures to cut weld bevels at specific angles on the edges of workpieces. The milling cutter, as its core tool, typically has multiple inserts that perform cutting simultaneously. The cutting edge angle of these inserts is a key factor determining machining quality, cutting efficiency, and tool life.

[0004] Currently, the cutting edge angle of traditional beveling cutter heads is fixed during manufacturing. When machining different materials (such as switching from carbon steel to stainless steel or alloy steel) or when process parameters need to be optimized, the machine must be stopped and the entire set of cutter heads or inserts with the corresponding angles must be replaced to achieve cutting operations on different materials. This process has the following drawbacks:

[0005] First, stopping the machine to change the blade requires disassembly and reassembly, which severely reduces equipment utilization and production efficiency; in other words, the existing fixed blades lack flexibility and cannot quickly respond to changes in production tasks.

[0006] Secondly, having multiple spare cutter heads results in high procurement and storage costs.

[0007] Secondly, tool resetting is required after replacement, which introduces the risk of human error and affects the consistency of machining accuracy. Summary of the Invention

[0008] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a cutting device with an adjustable cutting edge angle, which overcomes the defects of the fixed and non-adjustable cutting edge angle of the existing beveling machine milling cutter head, resulting in poor adaptability, low tool changing efficiency and high cost.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0010] A cutting device with an adjustable cutting edge angle, comprising:

[0011] The cutter head assembly includes a cutter head, which is positioned around the connecting shaft. The cutter head is detachably connected to the main shaft of the beveling machine via the connecting shaft. Multiple cutter holders are rotatably mounted around the circumference of the cutter head. The central axis of the cutter holders is perpendicular to the central axis of the cutter head. Cutting blades are mounted on the cutter holders. The connecting shaft is circumferentially fitted with a first input shaft and a second input shaft.

[0012] An angle locking mechanism includes an indexing assembly disposed between the tool head and the tool holder. The indexing assembly includes an indexing ring with a first indexing groove on its circumference. A positioning spring assembly is placed in the hollow part of the indexing ring. A first input shaft is connected to the positioning spring assembly through a first transmission assembly, so that the positioning spring assembly can extend and retract radially along the indexing ring, thereby driving the positioning spring assembly to engage in the first indexing groove to lock the tool holder at a preset angle position.

[0013] An angle adjustment drive mechanism includes an output component located on the end face of the indexing ring, a second input shaft connected to the output component via a second transmission assembly, and the indexing ring connected to the tool holder via a third transmission assembly to drive all tool holders to rotate when the indexing ring rotates, thereby changing the cutting edge angle of the blade. A portion of the first transmission assembly passes through the hollow part of the second transmission assembly.

[0014] As described above, in a cutting device with an adjustable cutting edge angle, the second input shaft is sleeved around the first input shaft, the first input shaft is rotatably mounted around the connecting shaft, one end of the connecting shaft for connection with the main shaft of the beveling machine extends beyond the first input shaft, the second input shaft is rotatably mounted around the first input shaft, the length of the second input shaft is shorter than the length of the first input shaft, and the ends of the second input shaft and the first input shaft near the cutter head are flush.

[0015] As described above, in a cutting device with an adjustable cutting edge angle, a scale is arranged circumferentially on the connecting shaft, the scale is placed between the first input shaft and the second input shaft, and the side of the scale with the scale lines is placed between the first input shaft and the second input shaft.

[0016] As described above, in a cutting device with an adjustable cutting edge angle, the first transmission component includes a first input bevel gear, which is located at one end of a first input shaft. The first input bevel gear is connected to a third input shaft, and the output end of the third input shaft is connected to a fifth input shaft. The fifth input shaft is connected to the positioning and spring-loaded assembly, and the positioning and spring-loaded assembly is driven to achieve telescopic movement through the fifth input shaft.

[0017] As described above, in a cutting device with an adjustable cutting edge angle, the positioning and spring-loaded assembly includes a cylindrical cam connected to the fifth input shaft. The cylindrical cam is placed inside a pin sleeve, and a positioning pin is sleeved around the cylindrical cam. The positioning pin can extend from one end of the pin sleeve and be limited by the pin sleeve. An elastic element is provided between the pin sleeve and the positioning pin. The positioning pin is provided with a follower linkage that cooperates with the cylindrical cam. The fifth input shaft drives the cylindrical cam to rotate, thereby driving the follower linkage to perform linear motion. The positioning pin and the pin sleeve are slidably connected.

[0018] The profile of the cylindrical cam is configured such that, within its rotational range of 0° to 180°, its lift continuously presses the locating pin from the extended position to the fully retracted position; and, at rotational positions exceeding 180°, its profile allows the elastic element to instantaneously reset the locating pin to the extended position.

[0019] As described above, in a cutting device with an adjustable cutting edge angle, the second transmission component includes a second input bevel gear, which is located at one end of the second input shaft. The outer diameter of the second input bevel gear is larger than that of the first input bevel gear. The second input bevel gear is connected to a fourth input shaft, which is sleeved around the third input shaft. The output end of the fourth input shaft meshes with the output component.

[0020] As described above, in a cutting device with an adjustable cutting edge angle, multiple tool holder bases are evenly arranged at the end of the cutter head away from the connecting shaft. The tool holder is arranged at the tool holder base and is rotatable relative to the tool holder base. The third transmission component is a planetary gear set. The outer gear ring of the planetary gear set is fixed to the planetary gear base. The planetary gear base is fixedly connected to the tool holder base. The indexing ring is connected to the input end of the planetary gear set. The side of the tool holder is connected to the output shaft of the planetary gear set. The tool holder and the cutting blade are detachably connected.

[0021] As described above, in a cutting device with an adjustable cutting edge angle, the tool holder base is connected to a ring sleeve, a mounting plate is provided inside the ring sleeve, and a mounting groove is formed between the mounting plate and the ring sleeve. The indexing ring is placed in the mounting groove, the ring sleeve is fixed to the tool disc, and the mounting plate is radially provided with multiple second indexing grooves. The positioning spring assembly is provided through the second indexing groove, and the second indexing groove can be aligned with the first indexing groove so that the positioning spring assembly enters the first indexing groove through the second indexing groove. The mounting plate supports the first transmission assembly.

[0022] The positioning and rebound assembly is provided in three sets, and the interval between two adjacent sets of positioning and rebound assemblies is set at a certain angle.

[0023] Secondly, the present invention also provides a cutting device, including the aforementioned cutting device with an adjustable cutting edge angle.

[0024] Thirdly, the present invention also provides a method for operating a cutting device with an adjustable cutting edge angle, comprising the following:

[0025] Initial / Locked State: The positioning springback assembly is embedded in a certain indexing slot of the indexing ring, and the tool holder is angularly locked;

[0026] Unlocking steps: The operator rotates the first input shaft, and the power is transmitted to the positioning and spring-back assembly through the first input shaft and the first transmission assembly. The positioning and spring-back assembly retracts, causing the positioning and spring-back assembly to disengage from the tool holder, thereby unlocking the tool holder.

[0027] Adjustment steps: Keep the first input shaft in the unlocked position, the operator rotates the second input shaft, the power is transmitted to the indexing ring through the second transmission component, the indexing ring starts to rotate, the indexing ring transmits the power to the tool holder through the third transmission component, the tool holder drives the blade to rotate to adjust the blade's cutting edge angle;

[0028] Locking procedure: After the blade's cutting edge angle is adjusted to the correct position, continue rotating the first input shaft in the same direction. The positioning and spring-loaded assembly will continue to operate until it engages with the indexing groove of the indexing ring.

[0029] The beneficial effects of the present invention are as follows:

[0030] By circumferentially arranging a first input shaft and a second input shaft, the first input shaft connects to a positioning and spring-loaded assembly via a first transmission component. This allows the positioning and spring-loaded assembly to extend and retract radially along the indexing ring, thereby engaging the positioning and spring-loaded assembly into the first indexing slot to lock the tool holder at a preset angle. The second input shaft connects to the indexing ring via a second transmission component, and the indexing ring connects to the tool holder via a third transmission component. This allows all tool holders to rotate when the indexing ring rotates, changing the cutting edge angle of the blades. A well-arranged first and second input shaft allows for online adjustment as needed, with high adjustment efficiency, enabling rapid response to changes in production tasks and improving work efficiency. The tool holder is locked at a preset angle position via the rotation of the first input shaft, while the second input shaft provides a simple and intuitive operation. The complex transmission components are highly integrated within the tool disc, facilitating manufacturing, assembly, and maintenance. Attached Figure Description

[0031] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0032] Figure 1 This is a schematic diagram of the overall structure assembly of the present invention;

[0033] Figure 2 This is an exploded view of the overall structure of the present invention;

[0034] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A;

[0035] Figure 4 This is a partial cross-sectional view showing the cooperation of the positioning spring-back component, the angle adjustment drive mechanism, and the angle locking mechanism of the present invention.

[0036] Figure 5 For the present invention Figure 4 An enlarged schematic diagram of the structure at point B in the diagram;

[0037] Figure 6 This is a schematic diagram of the separate structure of the positioning spring-back component, the angle locking mechanism, and the angle adjustment drive mechanism of the present invention;

[0038] Figure 7 This is a partial cross-sectional view of the positioning and rebound assembly of the present invention;

[0039] In the diagram: 1. Tool head assembly; 2. Second transmission assembly; 3. Tool; 4. Indexing assembly; 4-1. Indexing slot; 5. Positioning and springback assembly; 6. First transmission assembly; 7. Ring sleeve; 8. Planetary gear base; 9. Planetary gear set; 10. First output bevel gear; 11. Second output bevel gear; 12. Third input shaft; 13. Fourth input shaft; 14. Third output bevel gear; 15. Eighth output bevel gear; 16. Fourth output bevel gear; 17. Tool holder; 18. Second vertical plate; 19. First vertical plate; 20. Positioning pin; 20-1. First follower linkage; 20-2. Second follower linkage; 20-3. 1. First boss; 20-4. Second boss; 21. Pin sleeve; 21-1. Guide groove; 22. Spring; 23. Cylindrical cam; 23-1. First spiral strip; 23-2. Second spiral strip; 24. Base plate; 25. Bearing; 26. Seventh output bevel gear; 27. Mounting plate; 28. Connecting shaft; 29. ​​First input shaft; 30. Second input shaft; 31. Tool head; 32. Blade; 33. Tool holder base; 34. First input bevel gear; 35. Second input bevel gear; 36. Sixth output bevel gear; 37. Fifth output bevel gear; 38. Indexing ring; 39. Fifth input shaft; 40. Ball bearing. Detailed Implementation

[0040] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] As described in the background section, existing beveling machines have a fixed and non-adjustable cutting edge angle. To address this technical problem, this invention proposes a cutting device with an adjustable cutting edge angle.

[0043] Example 1

[0044] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a cutting device with an adjustable cutting edge angle includes:

[0045] The cutter head assembly 1 includes a cutter head 31, which is placed around the connecting shaft 28. The cutter head 31 is detachably connected to the main shaft of the beveling machine via the connecting shaft 28. Multiple cutter holders 17 are rotatably mounted on the circumference of the cutter head 31. The cutter blades 32 are mounted on the cutter holders 17. The connecting shaft 28 is circumferentially fitted with a first input shaft 29 and a second input shaft 30.

[0046] Angle locking mechanism includes an indexing assembly 4 disposed between the tool head 31 and the tool holder 17. The indexing assembly 4 includes an indexing ring 38, and a first indexing groove 4-1 is provided on the periphery of the indexing ring 38. A positioning spring assembly is placed in the hollow part of the indexing ring 38. The first input shaft 29 is connected to the positioning spring assembly 5 through the first transmission assembly 6, so that the positioning spring assembly 5 can extend and retract along the radial direction of the indexing ring 38, thereby driving the positioning spring assembly to engage in the first indexing groove 4-1 to lock the tool holder 17 at a preset angle position.

[0047] Angle adjustment drive mechanism includes an output component located on the end face of the indexing ring 38, a second input shaft 30 connected to the output component via a second transmission assembly 2, and an indexing ring 38 connected to a tool holder 17 via a third transmission assembly, so as to drive all tool holders 17 to rotate when the indexing ring 38 rotates to change the cutting edge angle of the blade 32. A portion of the first transmission assembly 6 passes through the hollow part of the second transmission assembly 2.

[0048] Regarding the cutter head assembly 1: The inner side of the connecting shaft 28 is engaged with the main shaft of the beveling machine. The connecting shaft 28 is a hollow structural component. Specifically, the inner side of the connecting shaft is provided with a groove, and the side of the main shaft of the beveling machine is provided with a protrusion. The protrusion is engaged in the groove of the connecting shaft 28 to realize the connection between the connecting shaft 28 and the main shaft of the beveling machine. Moreover, the cutter head 31 is fixedly connected to the connecting shaft 28.

[0049] In this embodiment, the cutter head 31 is an annular structure with a set width. Twenty tool holder bases 33 are evenly fixed to the circumferential end face of one end of the cutter head 31 by bolts. Of course, other numbers of tool holder bases 33 can also be used. The inner side of the tool holder base 33 is arc-shaped and cooperates with the tool holder 17 so that the inner side of each tool holder base 33 can rotatably support the tool holder 17. Each tool holder 17 has a slot at its head, and a standard blade 32 is installed in the slot by screws. The blade 32 is a carbide blade 32. The rotation axis of the tool holder 17 is perpendicular to the end face of the cutter head 31. The cutting edge angle of the blade 32 is adjusted by rotating the tool holder 17 relative to its own axis. All blades have the same structure.

[0050] It should be noted that the ring sleeve 7, the tool holder base 33, and the tool holder 17 constitute the tool 3. The tool holder base 33 is connected to the ring sleeve 7 via the planetary gear base 8. The outer shape of the ring sleeve 7 is the same as the shape of the tool holder base after it is fitted with the tool holder 17. A mounting plate 27 is provided inside the ring sleeve 7, and a mounting groove is formed between the mounting plate 27 and the ring sleeve 7. The indexing ring 38 is placed in the mounting groove, and the eighth output bevel gear 15 is also placed in the mounting groove. The ring sleeve 7 supports the indexing ring 38 through bearings, allowing the indexing ring 38 to rotate relative to the ring sleeve 7. The ring sleeve 7 is fixed to the tool disc 31. Since both the ring 7 and the tool holder base 33 are fixed to the tool disc 31, the mounting bracket of the third transmission component between the ring 7 and the tool holder base 33 is fixed and will not affect the operation of the third transmission component. The mounting plate is radially and evenly provided with multiple second indexing slots, specifically three second indexing slots. The second indexing slots can communicate with the first indexing slot 4-1 so that the positioning pin of the positioning spring component enters the first indexing slot 4-1. The positioning spring component is placed inside the mounting plate 27. The mounting plate 27 has an opening in the center to rotatably support the fifth input shaft 39.

[0051] In this embodiment, the positioning spring assembly 5 is provided in three sets, with an angle set between adjacent sets of positioning spring assemblies 5. The three-point layout of the positioning spring assembly 5 provides a stable mechanical lock, can withstand harsh cutting loads, and ensures the stability of the machining process.

[0052] To achieve angle adjustment, both the first input shaft 29 and the second input shaft 30 are supported on the inner side of the cutter head 31 by bearings. Both the first input shaft 29 and the second input shaft 30 are hollow shafts. The second input shaft 30 is fitted around the first input shaft 29 in the circumferential direction. The first input shaft 29 is rotatably mounted on the connecting shaft 28 in the circumferential direction. The end of the connecting shaft 28 that is connected to the main shaft of the beveling machine extends beyond the first input shaft 29. The second input shaft 30 is rotatably mounted on the first input shaft 29 in the circumferential direction. The length of the second input shaft 30 is shorter than that of the first input shaft 29. The length of the shaft is 9, which has the characteristic of preventing misoperation. The ends of the second input shaft 30 and the first input shaft 29 near the cutter head 31 can be flush. The first input shaft is provided with the first input bevel gear 34 in the first transmission assembly, and the end of the second input shaft 30 is provided with the second input bevel gear 35 in the second transmission assembly. Thus, the operator only needs to rotate the first input shaft or the second input shaft to drive the positioning spring assembly to retract from the first indexing groove 4-1 through the first transmission assembly, or drive the indexing ring 38 to rotate through the second transmission assembly.

[0053] In addition, a scale is arranged around the connecting shaft 28. The scale is positioned between the first input shaft 29 and the second input shaft 30. The side of the scale with scale lines (the scale lines are angle scale lines, and there are two circles of scale lines) is positioned between the first input shaft 29 and the second input shaft 30. The arrangement of the scale facilitates the determination of the rotation angle of the first input shaft 29 and the second input shaft 30. To further facilitate observation, the first input shaft 29 is provided with a downward arrow, and the second input shaft 30 is provided with an upward arrow. Both arrows are set towards the scale lines.

[0054] refer to Figure 3 and Figure 5 As shown, the first transmission assembly includes a first input bevel gear 34, which is located at one end of the first input shaft 29. The first input bevel gear 34 is connected to the third input shaft 12. The output end of the third input shaft 12 is connected to the fifth input shaft 39. The fifth input shaft 39 is supported by a mounting plate 27. The mounting plate is equipped with a ball bearing 40 to support the fifth input shaft 39. The fifth input shaft 39 is connected to the positioning and spring-loaded assembly 5. The positioning and spring-loaded assembly 5 is driven by the fifth input shaft 39 to achieve telescopic movement.

[0055] Specifically, the first input bevel gear 34 meshes with 20 first output bevel gears 10, each of which is fixed to one end of the third input shaft 12. This constitutes the first stage of bevel gear transmission, which converts the coaxial rotational input from the back into 20 sets of parallel shaft outputs evenly distributed around the circumference.

[0056] It is easy to understand that the second transmission assembly includes a second input bevel gear 35, which meshes with 20 second output bevel gears 11. The second output bevel gears 11 are located inside the first output bevel gears 10. Each second output bevel gear 11 is fixed to one end of a corresponding fourth input shaft 13. The fourth input shaft 13 is located circumferentially around the third input shaft 12. A bearing is provided between the two to ensure their relative rotation. The length of the fourth input shaft 13 is shorter than the length of the third input shaft 12. The third input shaft 12 passes through one end of the fourth input shaft 13 and connects to the fifth input shaft 39. The fourth input shaft 13 is circumferentially provided with a first vertical plate 19 and a second vertical plate 18. The fourth input shaft 13 is rotatable relative to the first vertical plate and the second vertical plate. The fourth input shaft 13 is fixed to the outside of the ring sleeve 7 by the first vertical plate 19 and the second vertical plate 18. The fourth input shaft 13 passes through the ring sleeve 7 and enters the interior of the mounting plate 27.

[0057] In this embodiment, a third output bevel gear 14 is provided at the other end of the third input shaft 12, and a fourth output bevel gear 16 is provided at one end of the fifth input shaft 39. The third output bevel gear 14 and the fourth output bevel gear 16 mesh with each other to drive the rotation of the fifth input shaft 39. The fifth input shaft 39 passes through the center of the mounting plate 27, and a sixth output bevel gear 36 is provided at the end of the fifth input shaft 39 exposed on the mounting plate 27. The fourth output bevel gear 16 drives the sixth output bevel gear 36 to rotate through the fifth input shaft 39. The sixth output bevel gear 36 ultimately drives the seventh output bevel gear 26. The seventh output bevel gear 26 is fixedly connected to the end of the cylindrical cam 23 of the positioning spring-back assembly. This constitutes the second and third stage bevel gear transmission, which is used to transmit power to the locking mechanism.

[0058] Reference Figure 4 and Figure 5 As shown, an eighth output bevel gear 15 is fixed at the end of the fourth input shaft 13 away from the second output bevel gear 11. The eighth output bevel gear 15 meshes with the output component, which is specifically the fifth output bevel gear 37. The indexing ring 38 is directly driven to rotate through the fifth output bevel gear 37.

[0059] refer to Figure 7 As shown, the positioning and rebound assembly includes a cylindrical cam 23 connected to the fifth input shaft 39. The cylindrical cam 23 is placed inside the pin sleeve 21. A base plate 24 is provided at the bottom of the pin sleeve 21. The base plate 24 supports the cylindrical cam 23 through a bearing 25. A positioning pin 20 is sleeved around the cylindrical cam 23. The positioning pin 20 can extend from one end of the pin sleeve 21 and be limited by the pin sleeve 21. An elastic element is provided between the pin sleeve 21 and the positioning pin 20. The elastic element is specifically a spring 22. The positioning pin 20 is provided with a follower linkage that cooperates with the cylindrical cam 23. The fifth input shaft 39 drives the cylindrical cam 23 to rotate, thereby driving the follower linkage to perform linear motion. The positioning pin 20 is slidably connected to the pin sleeve 21.

[0060] The profile of the cylindrical cam is configured such that, within its rotational range of 0° to 180°, its lift continuously presses the locating pin from the extended position to the fully retracted position; and, at rotational positions exceeding 180°, its profile allows the elastic element to instantaneously reset the locating pin to the extended position.

[0061] Reference Figure 4 and Figure 7As shown, the seventh output bevel gear 26 is fixed to one end of the cylindrical cam 23. Each positioning spring assembly 5 includes: a positioning pin 20 that can slide radially along the mounting plate 27. The positioning pin 20 has a protrusion. The pin sleeve 21 is a cylindrical structural component. The cylindrical cam 23 is set through one end of the pin sleeve 21. The other end of the pin sleeve 21 is provided with an opening for the protrusion of the positioning pin 20 to pass through. The outer peripheral surface of the positioning pin 20 near the opening end is provided with a first boss 20-3 and a second boss 20-4. Guide grooves 21-1 are respectively opened on both sides inside the pin sleeve 21. The first boss 20-3 and the second boss 20-4 are embedded in the guide grooves 21-1 on the corresponding sides. The first boss 20-3 and the second boss 20-4 can be cylindrical blocks or rectangular blocks, constraining the positioning pin 20 to only make radial linear movements. One end of the spring 22 is connected to one end of the pin sleeve 21, and the other end is connected to the end of the positioning pin near the protrusion. The spring 22 pushes the positioning pin 20 outward. The positioning pin 20 is ejected, and two follower links are provided on the inner wall of the positioning pin 20. The two follower links are arranged opposite to each other, specifically the first follower link 20-1 and the second follower link 20-2. The other end of each follower link contacts the contour surface of the cylindrical cam 23. The first follower link 20-1 and the second follower link 20-2 are respectively attached to the lower surfaces of the first spiral bar 23-1 and the second spiral bar 23-2 in the circumferential direction of the cylindrical cam. The first spiral bar 23-1 and the second spiral bar 23-2 are staggered in the circumferential direction of the cylindrical cam 23, and are arranged at a distance of 180°. The cylindrical cam 23 rotates counterclockwise, causing the positioning pin 20 to move inward. When it reaches the end of the first spiral bar 23-1 and the second spiral bar 23-2, the spring 22 pushes against the positioning pin 20, and the first follower link 20-1 and the second follower link 20-2 pass the end of the first spiral bar 23-1 and the second spiral bar 23-2 to the top of the other spiral bar, and the positioning pin 20 is reset.

[0062] It is easy to explain that the third transmission component is a planetary gear set 9. The outer gear ring of the planetary gear set 9 is fixedly connected to the planetary gear base 8. The indexing ring 38 is connected to the input end of the planetary gear set 9. The side of the tool holder 17 is connected to the output shaft of the planetary gear set 9. The planetary gear set 9 includes a mounting bracket, and a gear ring is provided inside the mounting bracket. The planetary gear set 9 also includes a central gear and planetary gears. The central gear meshes with the planetary gears, and the planetary gears mesh with the gear ring. Thus, the indexing ring 38 drives the tool holder 17 to rotate through the planetary gear set 9.

[0063] Specifically, the side of the tool holder 17 is connected to the output shaft of the planetary gear set 9, and the end face of the indexing ring 38 is connected to the input shaft of the planetary gear set 9 through a connecting shaft. The mounting plate 27 and the indexing ring 38 form an inner and outer shaft fit. The inner side wall of the indexing ring 38 has 18 evenly distributed first indexing slots 4-1 (spaced 20° apart). By rotating the indexing ring 38, the positioning spring-loaded components are inserted into different first indexing slots 4-1.

[0064] The milling cutter structure provided in this embodiment features a unique coaxial dual-input shaft design, allowing operators to quickly adjust the angle next to the machine tool without disassembling the cutter head or changing the inserts. This greatly improves equipment utilization and production flexibility. The multi-stage bevel gear transmission assembly ensures absolute synchronization of all tool holders 17 during adjustment, guaranteeing machining concentricity and consistency. The locking is reliable and rigid: the three-point layout of the positioning spring assembly provides a stable mechanical lock, capable of withstanding harsh cutting loads and ensuring stable machining. Operators only need to operate the two coaxially extended first input shafts 29 and second input shafts 30 on the back of the cutter head, following a clear "unlock-adjust-lock" process, to complete 1° sensitivity adjustments of the cutting edge angle within minutes, completely eliminating the need for machine downtime for tool changes.

[0065] Example 2

[0066] This embodiment discloses a working method of a cutting device with an adjustable cutting edge angle, including the following:

[0067] 1) Initial / Locked State: Spring 22 pushes out the positioning pin 20, and its head is embedded in a first indexing slot 4-1 of the indexing ring 38. Since the side of the indexing ring 38 is connected to the side of the tool holder 17 through a planetary gear set (position fixed), and the mounting plate 27 is fixed to the ring sleeve 7, and the ring sleeve 7 is fixed on the tool disc 31, the tool holder 17 is angularly locked.

[0068] 2) Unlocking Steps: The operator rotates the extended first input shaft 29. The power transmission path is: first input shaft 29 → first input bevel gear 34 → first output bevel gear 10 → third input shaft 12 → third output bevel gear 14 → fourth output bevel gear 16 → fifth input shaft 39 → sixth output bevel gear 36 → seventh output bevel gear 26. The rotation of the seventh output bevel gear 26 drives the connected cylindrical cam 23 to rotate. The first follower link 20-1 and the second follower link 20-2 of the positioning pin 20 move along the profile of the rotating cylindrical cam 23. The cam profile has a lift range from 0° to 180° (see reference). Figure 7 As shown, the locating pin 20 is forced to retract towards the center against the force of the spring 22 by the follower linkage. When the first input shaft 29 rotates at a certain angle, the locating pin 20 is fully retracted, disengaging from the first indexing slot 4-1, and the tool holder 17 is unlocked.

[0069] 3) Adjustment steps: With the first input shaft 29 in the unlocked position, the operator rotates the extended second input shaft 30. The power transmission path is: second input shaft 30 → second input bevel gear 35 → second output bevel gear 11 → fourth input shaft 13 → eighth output bevel gear 15 → fifth output bevel gear 37 → indexing ring 38. The indexing ring 38 begins to rotate. The indexing ring 38 is coaxially driven with the input shaft of the planetary gear set 9, transmitting power to the tool holder 17 connected to the output shaft of the planetary gear set 9. The transmission ratio is 20:1. Since the first indexing slots 4-1 are arranged in a 20° interval circle, the tool holder rotates 1° after the indexing ring rotates through two adjacent first indexing slots. In fact, the adjustment power is mainly used to directly drive the tool holder 17 to rotate, and the operator can rotate the tool holder to the target angle.

[0070] 4. Locking Procedure: After adjustment, continue rotating the first input shaft 29 in the same direction (from 180° to 360°), and the cylindrical cam 23 continues to rotate. When it exceeds 180°, the follower linkage reaches the "sudden drop" reset section of the cylindrical cam 23 profile. The energy stored in the spring 22 is released instantaneously, violently pushing the locating pin 20 radially outward. If the mounting plate 27 has been rotated so that a certain first indexing slot 4-1 is aligned with the locating pin 20, the locating pin 20 immediately engages and locks. If it is not aligned, the locating pin 20 presses against the outer wall of the indexing ring 38, and the operator can fine-tune the second input shaft 30 until it "jumps" into the first indexing slot 4-1. The three-point layout of the locating pin ensures the stability and accuracy of the locking.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cutting device with an adjustable cutting edge angle, characterized in that, include: The cutter head assembly includes a cutter head, which is positioned around the connecting shaft. The cutter head is detachably connected to the main shaft of the beveling machine via the connecting shaft. Multiple cutter holders are rotatably mounted around the circumference of the cutter head. The central axis of the cutter holders is perpendicular to the central axis of the cutter head. Cutting blades are mounted on the cutter holders. The connecting shaft is circumferentially fitted with a first input shaft and a second input shaft. An angle locking mechanism includes an indexing assembly disposed between the tool head and the tool holder. The indexing assembly includes an indexing ring with a first indexing groove on its circumference. A positioning spring assembly is placed in the hollow part of the indexing ring. A first input shaft is connected to the positioning spring assembly through a first transmission assembly, so that the positioning spring assembly can extend and retract radially along the indexing ring, thereby driving the positioning spring assembly to engage in the first indexing groove to lock the tool holder at a preset angle position. An angle adjustment drive mechanism includes an output component located on the end face of the indexing ring, a second input shaft connected to the output component via a second transmission assembly, and the indexing ring connected to the tool holder via a third transmission assembly to drive all tool holders to rotate when the indexing ring rotates, thereby changing the cutting edge angle of the blade. A portion of the first transmission assembly passes through the hollow part of the second transmission assembly.

2. The cutting device with adjustable cutting edge angle according to claim 1, characterized in that, The second input shaft is sleeved around the first input shaft in the circumferential direction. The first input shaft is rotatably mounted around the connecting shaft in the circumferential direction. The end of the connecting shaft that is connected to the main shaft of the beveling machine extends beyond the first input shaft. The second input shaft is rotatably mounted around the first input shaft in the circumferential direction. The length of the second input shaft is shorter than the length of the first input shaft. The ends of the second input shaft and the first input shaft near the cutter head can be flush.

3. The cutting device with adjustable cutting edge angle according to claim 1, characterized in that, The connecting shaft is provided with a circumferentially arranged dial, which is placed between the first input shaft and the second input shaft. The side of the dial with the scale lines is placed between the first input shaft and the second input shaft.

4. The cutting device with adjustable cutting edge angle according to claim 1, characterized in that, The first transmission component includes a first input bevel gear, which is located at one end of a first input shaft. The first input bevel gear is connected to a third input shaft, and the output end of the third input shaft is connected to a fifth input shaft. The fifth input shaft is connected to the positioning and spring-loaded assembly, and the positioning and spring-loaded assembly is driven to achieve telescopic movement through the fifth input shaft.

5. A cutting device with an adjustable cutting edge angle according to claim 4, characterized in that, The positioning and rebound assembly includes a cylindrical cam connected to the fifth input shaft. The cylindrical cam is placed inside a pin sleeve, and a positioning pin is sleeved around the cylindrical cam. The positioning pin can extend from one end of the pin sleeve and be limited by the pin sleeve. An elastic element is provided between the pin sleeve and the positioning pin. The positioning pin is provided with a follower linkage that cooperates with the cylindrical cam. The fifth input shaft drives the cylindrical cam to rotate, thereby driving the follower linkage to perform linear motion. The positioning pin and the pin sleeve are slidably connected. The profile of the cylindrical cam is configured such that, within its rotational range of 0° to 180°, its lift continuously presses the locating pin from the extended position to the fully retracted position; and, at rotational positions exceeding 180°, its profile allows the elastic element to instantaneously reset the locating pin to the extended position.

6. A cutting device with an adjustable cutting edge angle according to claim 4, characterized in that, The second transmission assembly includes a second input bevel gear, which is located at one end of the second input shaft. The outer diameter of the second input bevel gear is larger than that of the first input bevel gear. The second input bevel gear is connected to a fourth input shaft, which is sleeved around the third input shaft. The output end of the fourth input shaft meshes with the output component.

7. The cutting device with adjustable cutting edge angle according to claim 1, characterized in that, Multiple tool holder bases are evenly arranged at one end of the cutter head away from the connecting shaft. The tool holder is set at the tool holder base and can rotate relative to the tool holder base. The third transmission component is a planetary gear set. The outer gear ring of the planetary gear set is fixed to the planetary gear base. The planetary gear base is fixedly connected to the tool holder base. The indexing ring is connected to the input end of the planetary gear set. The side of the tool holder is connected to the output shaft of the planetary gear set. The tool holder and the cutting blade are detachably connected.

8. A cutting device with an adjustable cutting edge angle according to claim 1, characterized in that, The tool holder base is connected to the ring sleeve, and a mounting plate is provided inside the ring sleeve. A mounting groove is formed between the mounting plate and the ring sleeve. The indexing ring is placed in the mounting groove, and the ring sleeve is fixed to the tool disc. The mounting plate is radially provided with multiple second indexing grooves, which can be aligned with the first indexing groove. The positioning spring component is set through the second indexing groove, and the mounting plate supports the first transmission component. The positioning and rebound assembly is provided in three sets, and the interval between two adjacent sets of positioning and rebound assemblies is set at a certain angle.

9. A cutting device, characterized in that, The invention includes a cutting device with an adjustable cutting edge angle as described in any one of claims 1-8.

10. The operating method of the cutting device with adjustable cutting edge angle according to any one of claims 1-8, characterized in that, Includes the following: Initial / Locked State: The positioning springback assembly is embedded in a certain indexing slot of the indexing ring, and the tool holder is angularly locked; Unlocking steps: The operator rotates the first input shaft, and the power is transmitted to the positioning and spring-back assembly through the first input shaft and the first transmission assembly. The positioning and spring-back assembly retracts, causing the positioning and spring-back assembly to disengage from the tool holder, thereby unlocking the tool holder. Adjustment steps: Keep the first input shaft in the unlocked position, the operator rotates the second input shaft, the power is transmitted to the indexing ring through the second transmission component, the indexing ring starts to rotate, the indexing ring transmits the power to the tool holder through the third transmission component, the tool holder drives the blade to rotate to adjust the blade's cutting edge angle; Locking procedure: After the blade's cutting edge angle is adjusted to the correct position, continue rotating the first input shaft in the same direction. The positioning and spring-loaded assembly will continue to operate until it engages with the indexing groove of the indexing ring.

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