A tensioning sleeve device for processing long multiple-diameter cutter bodies and a tensioning method thereof

Abstract

The application provides a tensioning sleeve device for processing a long-multiple-diameter cutter body and a tensioning method thereof, which comprises an inner sleeve ring, the inner sleeve ring is sleeved outside the long-multiple-diameter cutter body, the extension direction of the inner sleeve ring is the axial direction of the long-multiple-diameter cutter body, and a plurality of release parts are arranged in an array along the circumferential direction on the inner sleeve ring; the tensioning assembly at least comprises a tensioning sleeve group sleeved outside the inner sleeve ring and a driving assembly, the driving assembly is used for driving the tensioning sleeve group to be tensioned towards the long-multiple-diameter cutter body along the radial direction of the long-multiple-diameter cutter body, so that the inner sleeve ring tightly embraces the long-multiple-diameter cutter body. The scheme can ensure that the long-multiple-diameter cutter body is subjected to uniform and stable embracing force during the processing process, effectively reduces vibration and deviation, significantly improves the processing precision and surface quality, and can adapt to long-multiple-diameter cutter bodies of different specifications. Through the adjustment of the driving assembly, the embracing needs of cutter bodies of various sizes can be flexibly met, and the flexibility and universality of production are increased.

Description

Technical Field

[0001] This application relates to the field of long-diameter tool body machining technology, specifically to a tensioning sleeve device and tensioning method for machining long-diameter tool bodies. Background Technology

[0002] Long-diameter tool body machining refers to machining tools with a relatively long length-to-diameter ratio (L / D ratio). These tools are typically used in deep hole machining or precision machining, where extremely high precision is required. Therefore, during machining, support fixtures or locking fixtures are needed to reduce tool body vibration, improve machining stability and accuracy, and extend tool life.

[0003] Traditional tooling often presents numerous challenges when handling long-diameter cutting tools, as the support fixtures are typically very simple. For instance, common clamping methods may fail to provide uniform and stable clamping force, leading to tool vibration and misalignment during machining, thus affecting machining accuracy and surface quality. Furthermore, some clamping devices are complex in structure, inconvenient to operate, and have high adjustment and maintenance costs. They also struggle to meet the clamping requirements of different long-diameter cutting tools, limiting machining efficiency and production flexibility. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, this application aims to provide a tensioning sleeve device and tensioning method for machining long-diameter tool bodies.

[0005] In a first aspect, this application proposes a tensioning sleeve device for machining long-diameter cutting tools, used to clamp the long-diameter cutting tool body, comprising:

[0006] An inner sleeve is fitted onto the long-diameter cutter body, the inner sleeve extending in the axial direction of the long-diameter cutter body, and the inner sleeve having a plurality of release parts arranged in an array along the circumference.

[0007] The tensioning assembly includes at least a tensioning sleeve fitted outside the inner collar and a driving assembly. The driving assembly is used to drive the tensioning sleeve to tension radially toward the long-diameter cutter body so that the inner collar tightly grips the long-diameter cutter body.

[0008] According to the technical solution provided in the embodiments of this application, the tensioning sleeve assembly includes:

[0009] An intermediate collar is fitted outside the inner collar, and the intermediate tube sleeve has a first conical surface on the side near the outer collar.

[0010] An outer ring is fitted over the middle ring. The outer ring has a second conical surface that mates with the first conical surface on the side near the middle ring. The diameter of the first conical surface gradually decreases as it moves away from the inner ring.

[0011] The driving component is used to drive the intermediate collar to move closer to the outer collar side. When the first tapered surface contacts the second tapered surface, the outer collar can squeeze the intermediate collar in the direction closer to the long-diameter cutter body, so that the intermediate collar deforms closer to the inner collar side.

[0012] According to the technical solution provided in the embodiments of this application, the outer ring near the middle ring also has a second cylindrical surface connected to the larger inner diameter side of the second conical surface, and the middle ring near the outer ring also has a first cylindrical surface connected to the larger inner diameter side of the first conical surface and adapted to the second cylindrical surface.

[0013] According to the technical solution provided in the embodiments of this application, the second cylindrical surface has a third conical surface connected to the second cylindrical surface on the side away from the second conical surface, and the first cylindrical surface has a fourth conical surface connected to the first cylindrical surface and adapted to the third conical surface on the side away from the first conical surface.

[0014] According to the technical solution provided in the embodiments of this application, the release part is a groove opened along the axial direction of the inner ring, the groove is a non-through groove, and the length of the non-through part is 4mm.

[0015] According to the technical solution provided in the embodiments of this application, the release part includes a plurality of first release parts and second release parts that are interleaved with the first release parts. The first release parts and the second release parts are both grooves that do not penetrate along the axial direction of the inner sleeve, and the groove opening directions of the first release parts and the second release parts are opposite.

[0016] According to the technical solution provided in the embodiments of this application, the intermediate collar is provided with a third release part, which is an opening that extends through the axial direction of the intermediate collar.

[0017] According to the technical solution provided in the embodiments of this application, the driving component includes:

[0018] Multiple threading holes are arranged in an array around the outer ring, and the extension direction of the threading holes is the axial direction of the outer ring;

[0019] Multiple threaded holes are arranged in an array around the intermediate collar, and each threaded hole has a threading hole that is adapted to it.

[0020] Multiple locking bolts, which pass through the matching threaded holes and threaded holes.

[0021] According to the technical solution provided in the embodiments of this application, the driving component further includes:

[0022] Drive motor;

[0023] The transmission assembly includes a central gear connected to the output shaft of the drive motor, and a plurality of peripheral gears arranged in an array around the central gear.

[0024] Multiple tightening parts are provided, each tightening part being connected to each of the peripheral gears. The tightening parts extend in the axial direction of the machining long-diameter tool body, and the ends of the tightening parts away from the peripheral gears are used to tighten the locking bolts.

[0025] Secondly, this application proposes a tensioning method for machining long-diameter cutting tools, based on the tensioning sleeve device for machining long-diameter cutting tools as described above, comprising the following steps:

[0026] S1. Obtain first structural parameters and second structural parameters. The first structural parameters include at least the diameter, surface roughness, and material hardness of the machining long-diameter tool body. The second structural parameters include at least the friction coefficient between the inner sleeve and the long-diameter tool body, and the slope angles of the second tapered surface and the third tapered surface.

[0027] S2. Based on the first structural parameters and the second structural parameters, obtain the target torque of the drive motor and the target number of the locking bolts;

[0028] S3. Insert the locking bolts corresponding to the target number into the matching threaded holes and threaded holes respectively, start the drive motor, and output the target torque so that the tensioning sleeve is tensioned radially toward the long-diameter cutter body.

[0029] Compared with existing technologies, the beneficial effects of this application are as follows: The tensioning sleeve device for machining long-diameter cutting tools provided in this application can ensure that the long-diameter cutting tool is subjected to a uniform and stable clamping force during machining, effectively reducing vibration and offset, and significantly improving machining accuracy and surface quality. For example, when machining high-precision slender shafts, it can ensure stable cutting by the tool, thereby obtaining ideal machining results. Moreover, compared with traditional complex clamping devices, the structure of this solution is simpler, reducing operational complexity. This not only reduces operator training costs but also improves work efficiency. At the same time, it can adapt to long-diameter cutting tools of different specifications. Through the adjustment of the drive component, it can flexibly meet the clamping requirements of various sizes of cutting tools, increasing production flexibility and versatility. For example, on the same production line, different specifications of long-diameter cutting tools can be quickly switched for machining without frequent changes to the clamping device, greatly improving production efficiency. Attached Figure Description

[0030] Figure 1 A schematic diagram of the structure of the tensioning sleeve device for machining long-diameter cutting tools provided in this application embodiment, mounted on the long-diameter cutting tool body;

[0031] Figure 2 Provided for the embodiments of this application Figure 1 A cross-sectional view along the axial direction of the tensioning sleeve device;

[0032] Figure 3 This is a schematic diagram of the tensioning sleeve device provided in the embodiments of this application;

[0033] Figure 4 This is a schematic diagram of the outer ring structure provided in an embodiment of this application;

[0034] Figure 5 This is a side view of the intermediate collar provided in an embodiment of this application;

[0035] Figure 6 This is a top view of the intermediate collar provided in an embodiment of this application;

[0036] Figure 7 This is a schematic diagram of the inner collar structure provided in an embodiment of this application.

[0037] The text labels in the image represent:

[0038] 1. Long-diameter cutter body; 2. Tensioning sleeve assembly; 21. Outer ring; 211. Third cylindrical surface; 212. Second conical surface; 213. Second cylindrical surface; 214. Third conical surface; 22. Intermediate collar; 221. Third release part; 222. First conical surface; 223. First cylindrical surface; 224. Fourth conical surface; 23. Inner collar; 231. First release part; 232. Second release part; 24. Threaded hole; 3. Drive assembly; 31. Locking bolt. Detailed Implementation

[0039] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] Example 1

[0042] As mentioned in the background section, in view of the problems in the prior art, this application proposes a tensioning sleeve device for machining long-diameter cutting tools, used to clamp the long-diameter cutting tool 1. Please refer to [reference needed]. Figure 1 and Figure 2 and Figure 3 As shown, it includes:

[0043] Inner ring 23, the inner ring 23 is sleeved on the outside of the long diameter cutter body 1, the extension direction of the inner ring 23 is the axial direction of the long diameter cutter body 1, and the inner ring 23 has a plurality of release parts arranged in an array along the circumference.

[0044] Specifically, the long-diameter cutter body 1 is in the shape of a long rod. The tensioning sleeve device is locked by a three-point clamp on the machine tool.

[0045] Furthermore, the release part is a groove opened along the axial direction of the inner sleeve 23, the groove is a non-through groove, and the length of the non-through part is 4mm.

[0046] Specifically, since the groove is not continuous, there will be a certain distance between the bottom of the groove and the edge of the release part on the same side as the bottom of the groove, and the length of this distance is 4mm.

[0047] Specifically, the inner ring 23 can be made of a flexible material. When the material of the inner ring 23 is relatively rigid, in order to release energy and deform it when the inner ring 23 is subjected to inward compressive force from the outside, a number of release parts are distributed.

[0048] Further, please refer to Figure 7 As shown, the release part includes a plurality of first release parts 231 and second release parts 232 that are interleaved with the first release parts 231. The first release parts 231 and the second release parts 232 are both grooves that do not penetrate along the axial direction of the inner sleeve 23, and the slotting directions of the first release parts 231 and the second release parts 232 are opposite.

[0049] Specifically, in order to allow the inner collar 23 to uniformly shrink and deform towards the long-diameter cutter body 1 around its circumference, two first release parts 231 can be selected, and a second release part 232 can be provided between the two first release parts 231. Since the slotting directions of the first release parts 231 and the second release parts 232 are opposite, the inner collar 23 can be squeezed and deformed around its entire circumference, thereby achieving the goal of tightly holding the long-diameter cutter body 1.

[0050] The tensioning assembly includes at least a tensioning sleeve 2 sleeved outside the inner collar 23 and a driving assembly 3. The driving assembly 3 is used to drive the tensioning sleeve 2 to tighten along the radial direction of the long-diameter cutter body 1 toward the long-diameter cutter body 1, so that the inner collar 23 hugs the long-diameter cutter body 1.

[0051] Further, please refer to Figure 4 and Figure 5 and Figure 6 As shown, the tensioning sleeve 2 includes:

[0052] An intermediate collar 22 is sleeved outside the inner collar 23, and the intermediate sleeve has a first conical surface 222 on the side near the outer collar 21.

[0053] Outer ring 21, the outer ring 21 is sleeved outside the middle ring 22, the outer ring 21 has a second tapered surface 212 that cooperates with the first tapered surface 222 on the side near the middle ring 22, and the diameter of the first tapered surface 222 gradually decreases along the axial direction of the long-diameter cutter body 1 towards the outer ring 21 and away from the inner ring 23;

[0054] The driving component 3 is used to drive the intermediate collar 22 to move closer to the outer collar 21. When the first conical surface 222 contacts the second conical surface 212, the outer collar 21 can squeeze the intermediate collar 22 towards the long-diameter cutter body 1, so that the intermediate collar 22 deforms towards the inner collar 23.

[0055] Specifically, when the driving element applies a force along the axial direction to the tensioning sleeve 2, due to the presence of the first conical surface 222, the axial force applied by the driving element is decomposed into a pressure perpendicular to the second conical surface 212 and a force along the direction of the second conical surface 212. When the second conical surface 212 contacts the first conical surface 222, the pressure perpendicular to the second conical surface 212 causes the first conical surface 222 to press the long-diameter cutter body 1 inward in the radial direction, thereby initiating a clamping effect.

[0056] In a preferred embodiment, the outer ring 21 near the middle ring 22 also has a second cylindrical surface 213 connected to the larger inner diameter side of the second conical surface 212, and the middle ring 22 near the outer ring 21 also has a first cylindrical surface 223 connected to the larger inner diameter side of the first conical surface 222 and adapted to the second cylindrical surface 213.

[0057] Specifically, as the axial force applied by the driving element is transmitted, the second cylindrical surface 213 and the first cylindrical surface 223 play a supporting and transitioning role. They can withstand and transmit the pressure from the second conical surface 212 and the first conical surface 222 while maintaining the stability of the structure.

[0058] In a preferred embodiment, the second cylindrical surface 213 has a third conical surface 214 connected to the second cylindrical surface 213 on the side away from the second conical surface 212, and the first cylindrical surface 223 has a fourth conical surface 224 connected to the first cylindrical surface 223 and adapted to the third conical surface 214 on the side away from the first conical surface 222.

[0059] Furthermore, the larger diameter third conical surface 214 and the fourth conical surface 224 are also subjected to axial force. This inclined surface further enhances the inward squeezing force, and works together with the smaller diameter second conical surface 212 and the first conical surface 222 to make the clamping force greater, thereby clamping the rod-shaped material more firmly.

[0060] For example, when using the tensioning sleeve device to tension a long-diameter cutter body 1, when a tightening force is applied externally, the first clamping part, composed of the first conical surface 222 and the second conical surface 212, first tightly clamps one end of the long-diameter cutter body 1. As the force continues to act, the second clamping part, composed of the third conical surface 214 and the fourth conical surface 224, also participates, strengthening the clamping effect from the other end, so that the long-diameter cutter body 1 is firmly fixed inside the device and is not easy to loosen or slip off.

[0061] In a preferred embodiment, the intermediate collar 22 is provided with a third release part 221, which is an opening that extends through the axial direction of the intermediate collar 22.

[0062] Specifically, during the locking process, the intermediate collar 22 is not a complete circular tube, but has an opening. Therefore, the intermediate collar 22 deforms, and the conical surface of the intermediate collar 22 sinks deeper into the groove formed by the conical surface of the outer collar 21. Consequently, the inner collar 23 also deforms due to the presence of the release part, thus locking the long-diameter cutter body 1.

[0063] In a preferred embodiment, the driving component 3 includes:

[0064] Multiple threading holes are arranged in an array around the outer ring 21, and the extension direction of the threading holes is the axial direction of the outer ring 21.

[0065] Multiple threaded holes 24 are arranged in a circumferential array on the intermediate collar 22, and each threaded hole 24 has a thread thread hole that is adapted to it.

[0066] Multiple locking bolts 31 pass through the matching threaded holes and threaded holes 24.

[0067] Specifically, the outer wall of the outer sleeve 21, on the side away from the inner sleeve 23, is a complete circular tube shape, a third cylindrical surface, compared to other tensioning sleeves. When the machine tool locks, the complete circle of the third cylindrical surface will not deform. Furthermore, the third cylindrical surface has been quenched to a hardness of HRC56 or higher. When iron filings hit the third cylindrical surface, it can reduce the occurrence of pits and maintain stability during rotation.

[0068] Furthermore, the second conical surface 212 and the third conical surface 214 of the outer ring 21 are 30° conical surfaces. The outer ring 21 has a certain thickness, and 10 thread-feeding holes and 4 second threaded holes are provided along its axial direction. The radial runout of the third cylindrical surface of the outer ring 21 relative to the second conical surface 212 and the third conical surface 214 is within 0.01 mm. The intermediate collar 22 has 10 threaded holes 24, two 30° second conical surfaces 212 and the third conical surface 214. The angular tolerance of each conical surface is within 10′, resulting in high fitting accuracy.

[0069] The radial runout of the inner and outer cylindrical surfaces of the inner ring 23 is within 0.005 mm. The long bar is placed inside the inner collar 23, contacting the inner cylindrical surface. The inner collar 23 is then placed inside the middle collar 22, with the outer cylindrical surface contacting the inner wall of the hole in the middle collar 22. The middle collar 22 is then placed inside the outer collar 21, so that the first conical surface 222 contacts the second conical surface 212, and the third conical surface 214 contacts the fourth conical surface 224. The 10 threaded holes 24 of the middle collar 22 are aligned with the 10 threading holes of the outer collar 21. The collar is then locked by the locking bolt 31. During the locking process, the middle collar 22, being not a complete circle, has an opening. After the locking bolt 31 is tightened, the inner hole deforms due to the opening, and the middle collar 22 sinks deeper. Consequently, the inner sleeve, due to the presence of grooves, also deforms, thus locking the long-diameter cutter body 1.

[0070] Optionally, during the locking process, not all of the locking bolts 31 need to be used. For processing small-diameter bars or when the bars are subjected to less force, four locking bolts 31 are sufficient for locking. For large-diameter bars or when the processing is subjected to excessive force, all of them need to be locked to prevent loosening.

[0071] It should be noted that the locking bolts 31 should be used symmetrically to ensure stable force distribution. During disassembly, simply loosen the locking screws and then screw the disassembly bolts into the second threaded hole on the outer sleeve. The intermediate collar 22 will be extruded by pressing against the axial end face of the intermediate collar 22. When changing tools, the outer collar 21 remains locked on the machine tool without disassembly. After loosening the intermediate collar 22, the inner collar 23 will also loosen, allowing the tool body to be easily removed. As long as the runout of the outer surface of long bars such as the long-diameter tool body 1 is good, the repeatability of this fixture is relatively high, achieving a runout within 0.02mm.

[0072] In a preferred embodiment, the driving component 3 further includes:

[0073] Drive motor;

[0074] The transmission assembly includes a central gear connected to the output shaft of the drive motor, and a plurality of peripheral gears arranged in an array around the central gear.

[0075] Multiple tightening parts are connected to each of the peripheral gears. The tightening parts extend in the axial direction of the machining long-diameter tool body 1. The ends of the tightening parts away from the peripheral gears are used to tighten the locking bolts 31.

[0076] Specifically, the locking bolt 31 can be tightened manually, but manual tightening is time-consuming and labor-intensive, and the accuracy is not well controlled. Therefore, this embodiment proposes to tighten it electrically.

[0077] Furthermore, when a drive motor is used as the drive source, since multiple bolts need to be tightened simultaneously, a transmission component needs to be set up so that multiple bolts can be tightened at the same time with one drive motor. At the same time, not only are they tightened simultaneously, but the tightening force in the circumferential direction is also relatively uniformly controlled.

[0078] Specifically, the number of peripheral gears is the same as the number of locking bolts 31.

[0079] Example 2

[0080] Based on Example 1, this example proposes a tensioning method for machining a long-diameter tool body 1, which is implemented using the tensioning sleeve device for machining a long-diameter tool body 1 as described above, and includes the following steps:

[0081] S1. Obtain the first structural parameter and the second structural parameter. The first structural parameter includes at least the diameter of the long-diameter cutting tool 1, the surface roughness, and the material hardness. The second structural parameter includes at least the friction coefficient between the inner ring 23 and the long-diameter cutting tool 1, and the slope angles of the second tapered surface 212 and the third tapered surface 214.

[0082] S2. Based on the first structural parameters and the second structural parameters, obtain the target torque of the drive motor and the target number of the locking bolts 31;

[0083] Optionally, a locking database is retrieved and traversed to obtain the target torque of the drive motor and the target number of locking bolts 31. The locking database includes at least several sets of structural parameter groups and tension parameters corresponding to each set of structural parameter groups. The tension parameters include the motor torque and the number of bolts. The target torque and the target number are the tension parameters corresponding to the first structural parameter and the second structural parameter.

[0084] S3. Insert the corresponding number of locking bolts 31 into the matching threaded holes and threaded holes 24 respectively, start the drive motor, and output the target torque so that the tensioning sleeve 2 is tensioned radially toward the long diameter cutter body 1.

[0085] The advantage of this invention lies in the fact that the third cylindrical surface 211 of the outer ring 21 is a complete circle with extremely high hardness and rigidity, preventing deformation and damage during locking. Only the inner ring 23 needs to be deformed to lock the bar stock, causing the workpiece and tooling to rotate together, preventing chipping caused by the tooling not rotating. Furthermore, when processing different diameters, it is not necessary to replace the entire tensioning sleeve assembly 2; only the inner sleeve needs to be replaced by changing the size of its inner hole, creating a new inner sleeve that is inserted into the intermediate sleeve for locking. This allows for tooling for processing bars of different diameters simply by changing one ring. This invention enables quick job changes without completely disassembling the tooling, repeated clamping of long bars, and ensures a runout within 0.02mm. Moreover, processing different diameter bars requires only replacing the inner ring 23, making the process smoother and simpler when changing bar batches.

[0086] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A tensioning sleeve device for machining long-diameter cutting tools (1), characterized in that, include: Inner ring (23), the inner ring (23) is sleeved on the outside of the long diameter cutter body (1), the extension direction of the inner ring (23) is the axial direction of the long diameter cutter body (1), and the inner ring (23) has a plurality of release parts arranged in an array along the circumference. The tensioning assembly includes at least a tensioning sleeve (2) sleeved outside the inner collar (23) and a driving assembly (3). The driving assembly (3) is used to drive the tensioning sleeve (2) to tighten towards the long-diameter cutter body (1) radially, so that the inner collar (23) hugs the long-diameter cutter body (1). The tensioning sleeve (2) includes: An intermediate collar (22) is fitted over the inner collar (23), and the intermediate collar (22) has a first conical surface (222) on the side near the outer collar (21). Outer ring (21), the outer ring (21) is sleeved outside the middle ring (22), the outer ring (21) has a second conical surface (212) that cooperates with the first conical surface (222) on the side near the middle ring (22), and the diameter of the first conical surface (222) gradually decreases in the direction that the outer ring (21) gradually moves away from the inner ring (23); The driving component (3) is used to drive the intermediate collar (22) to move closer to the outer collar (21). When the first conical surface (222) contacts the second conical surface (212), the outer collar (21) can squeeze the intermediate collar (22) towards the direction of the long-diameter cutter body (1) so that the intermediate collar (22) deforms towards the side of the inner collar (23). The outer ring (21) near the middle ring (22) also has a second cylindrical surface (213) connected to the larger inner diameter side of the second conical surface (212), and the middle ring (22) near the outer ring (21) also has a first cylindrical surface (223) connected to the larger inner diameter side of the first conical surface (222) and adapted to the second cylindrical surface (213). The second cylindrical surface (213) has a third conical surface (214) connected to the second cylindrical surface (213) on the side away from the second conical surface (212), and the first cylindrical surface (223) has a fourth conical surface (224) connected to the first cylindrical surface (223) and adapted to the third conical surface (214) on the side away from the first conical surface (222).

2. The tensioning sleeve device for machining long-diameter cutting tools according to claim 1, characterized in that: The release part is a groove opened along the axial direction of the inner sleeve (23). The groove is a non-through groove, and the length of the non-through part is 4mm.

3. The tensioning sleeve device for machining long-diameter cutting tools according to claim 1, characterized in that: The release section includes a plurality of first release sections (231) and second release sections (232) that are interleaved with the first release sections (231). The first release sections (231) and the second release sections (232) are both grooves that do not penetrate along the axial direction of the inner sleeve (23), and the groove opening directions of the first release sections (231) and the second release sections (232) are opposite.

4. The tensioning sleeve device for machining long-diameter cutting tools according to claim 1, characterized in that: The intermediate collar (22) is provided with a third release part (221), which is an opening that extends through the axial direction of the intermediate collar (22).

5. The tensioning sleeve device for machining long-diameter cutting tools according to claim 1, characterized in that: The driving component (3) includes: Multiple threading holes are arranged in an array around the outer ring (21), and the extension direction of the threading holes is the axial direction of the outer ring (21). Multiple threaded holes (24) are arranged in an array around the intermediate collar (22), and each threaded hole (24) has a thread thread hole that is compatible with it. Multiple locking bolts (31) pass through the matching threaded holes and the threaded holes (24).

6. The tensioning sleeve device for machining long-diameter cutting tools according to claim 5, characterized in that: The driving component (3) also includes: Drive motor; The transmission assembly includes a central gear connected to the output shaft of the drive motor, and a plurality of peripheral gears arranged in an array around the central gear. Multiple tightening parts are connected to each of the peripheral gears. The tightening parts extend in the axial direction of the machining long-diameter tool body (1). The ends of the tightening parts away from the peripheral gears are used to tighten the locking bolts (31).

7. A tensioning method for machining long-diameter cutting tools, based on the tensioning sleeve device for machining long-diameter cutting tools as described in claim 6, characterized in that: Includes the following steps: S1. Obtain the first structural parameter and the second structural parameter. The first structural parameter includes at least the diameter, surface roughness and material hardness of the machining long-diameter cutter body (1); the second structural parameter includes at least the friction coefficient between the inner collar (23) and the long-diameter cutter body (1), and the slope angles of the second tapered surface (212) and the third tapered surface (214). S2. Based on the first structural parameters and the second structural parameters, obtain the target torque of the drive motor and the target number of the locking bolts (31); S3. Insert the corresponding number of locking bolts (31) into the matching thread holes and threaded holes respectively, start the drive motor, and output the target torque so that the tensioning sleeve (2) is tensioned towards the long diameter cutter body (1) in the radial direction.

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