Alloy cutter assembly and cutter clamp
By using the limiting disc and spring mechanism of the alloy tool assembly, the problems of boring tool adjustment accuracy and stability are solved, ensuring the safety and service life of the boring tool during vibration.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- WUZHOU SANHE HARDWARE PROCESSING CO LTD
- Filing Date
- 2026-03-13
- Publication Date
- 2026-05-05
AI Technical Summary
During the adjustment process of existing boring tools, forgetting to tighten the locking bolt can cause thread wear between the threaded rod and the movable shaft, affecting the adjustment accuracy. Furthermore, when the tool is clamped during machine tool vibration, it may loosen, causing the cutting edge to shift, resulting in machining errors and damage.
An alloy tool assembly was designed, including a limiting plate and a spring mechanism, to ensure that the locking bolts are loosened before adjustment to prevent direct rotation of the adjustment knob, and to automatically protect the tool holder from displacement and wear when the mounting bolts are loose.
It effectively prevents thread wear, improves adjustment accuracy and machining stability, extends tool life, and reduces machining errors and damage risks.
Smart Images
Figure CN121972697A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of alloy boring tool technology, and more specifically, to an alloy tool assembly and tool holder. Background Technology
[0002] A boring bar is a specialized boring tool used for machining holes. It typically has one or two cutting edges and can perform roughing, semi-finishing, or finishing on existing holes. It is suitable for a variety of CNC machining equipment, such as lathes, boring machines, and milling machines.
[0003] When adjusting a precision boring tool, the operating procedure must be strictly followed: first loosen the locking bolt, then turn the adjusting knob for fine adjustments. If the adjusting knob is turned directly, the mating threads between the threaded rod and the movable shaft will experience abnormal wear due to the failure to release the locking force. Over time, this will lead to increased clearance and a significant decrease in adjustment accuracy. Because this procedure is rather cumbersome, it is easily overlooked in actual operation. Many users often fail to tighten the locking bolt before making adjustments, which accelerates component wear, affects positioning stability, and ultimately shortens the service life of the precision boring tool.
[0004] Furthermore, in existing common structures, the tool holder is usually directly fastened to the movable shaft by bolts alone. This connection method has hidden dangers during use: when the machine tool vibrates continuously or is subjected to cutting force impact, the bolts may gradually loosen, causing relative displacement or complete separation between the tool holder and the movable shaft. Once the carbide boring tool deviates during machining, its cutting edge will deviate from the intended trajectory, easily forming unexpected cutting or scratches on the inner wall of the workpiece. Such damage is often difficult to repair, directly causing the workpiece to be scrapped, increasing machining costs and quality risks.
[0005] In view of this, we propose an alloy tool assembly and tool holder. Summary of the Invention
[0006] (a) Technical problems to be solved To address the problems existing in the prior art, the present invention provides an alloy tool assembly and tool holder to solve the technical problem mentioned in the background art, which is that when workers forget to turn the locking bolt before turning the adjustment knob, the threads between the threaded rod and the movable shaft wear, resulting in reduced adjustment accuracy.
[0007] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: an alloy cutting tool assembly, comprising: a cutting tool body, wherein a guide hole is provided in the middle; A movable shaft is slidably connected to the guide hole of the cutter body. A threaded sleeve is fixedly connected to one side of the movable shaft. A mounting ring is fixedly connected to the guide hole of the cutter body. A threaded rod is rotatably connected to the mounting ring. The threaded rod is threadedly connected to the threaded sleeve. An adjustment knob is fixedly connected to the threaded rod. One end of the threaded rod has a hexagonal blind hole. A sliding rod is slidably connected to the middle of the threaded rod. One end of the sliding rod is fixedly connected to a block. The block slides within the hexagonal blind hole of the threaded rod. A limiting plate is fixedly connected to the other end of the sliding rod. A fixing ring is fixedly connected inside the threaded rod. The sliding rod is slidably connected to the fixing ring. The threaded rod is provided with a through groove. A sliding element is slidably connected inside the through groove of the threaded rod. A spring is fixedly connected between the sliding element and the fixing ring. A limiting component, disposed on the movable axis, is used to squeeze and limit the limiting plate; A tool fixing structure is provided on the movable shaft, and the tool fixing structure is used to install and fix the alloy tool.
[0008] Furthermore, the limiting component includes: Two sliding columns are provided, and the sliding columns are slidably connected to the movable shaft; An extrusion plate is fixedly connected to the two sliding columns. The extrusion plate is located outside the movable shaft and is slidably connected to the blade body. An arc-shaped plate is fixedly connected to the two sliding columns, and the arc-shaped plate is located inside the movable shaft.
[0009] Furthermore, the center of the arc-shaped plate coincides with the center of the limiting plate, the inner wall of the arc-shaped plate is provided with a rubber gasket, and the blade body is threadedly connected to a locking bolt, which abuts against the extrusion plate.
[0010] Furthermore, the sliding member is fixedly connected to a connecting ring, the connecting ring is fixedly connected to a circumferentially spaced limiting post, and the side of the connecting ring away from the adjusting knob is provided with a circumferentially spaced limiting hole, the limiting post and the limiting hole are matched for limiting.
[0011] Furthermore, the adjustment knob is provided with interval scale lines, and the number of the limiting holes and the number of the limiting pins are the same as the number of scale lines on the adjustment knob.
[0012] Furthermore, the tool fixing structure includes: A spline sleeve is fixedly connected to the movable shaft. The spline sleeve is splinedly connected to a spline shell, and an elastic element is fixedly connected between the spline shell and the movable shaft. A connecting sleeve is fixedly connected to the splined shell. The connecting sleeve is fixedly connected to guide posts that are spaced circumferentially. The guide posts are slidably connected to a limiting member. A spring is fixedly connected between the limiting member and the connecting sleeve.
[0013] Furthermore, the limiting member is L-shaped, extends through the connecting sleeve, and has an inclined surface.
[0014] A tool holder, employing the aforementioned alloy tool assembly, includes: Tool holder body; sleeved on the connecting sleeve, the tool holder body and the splined shell are in a limiting fit; The boring tool insert is detachably connected to the tool holder body.
[0015] Furthermore, the tool holder body has an installation thread inserted in the middle, the installation bolt is threaded to the splined shell, the installation bolt abuts against the movable shaft, and the installation bolt is fixed with a compression ring, which abuts against the limiting member.
[0016] Furthermore, the tool holder body is provided with a stepped surface one and a stepped surface two. The stepped surface one is limited by the limiting member, and the nut of the mounting bolt is limited by the stepped surface two. The stepped surface one and the stepped surface two are stepped.
[0017] (III) Beneficial Effects Compared with the prior art, the present invention provides an alloy tool assembly and tool holder, which has the following beneficial effects: 1. Before adjustment, the locking bolts must be loosened to release the pressure of the arc-shaped plate on the limiting disc. Only then can the hex wrench be smoothly inserted into the hexagonal blind hole of the threaded rod and push the internal sliding mechanism, creating conditions for rotating the adjustment knob. If the operator does not loosen the locking bolts first, the limiting disc will be firmly locked, and the hex wrench cannot be inserted, thus physically preventing direct adjustment. This avoids abnormal wear of the threads between the threaded rod and the threaded sleeve caused by forcibly rotating the adjustment knob due to forgetting or neglecting the correct procedure, effectively ensuring the long-term precision of the transmission components and the accuracy of adjustment.
[0018] 2. Addressing the industry-wide problem of tool holder mounting bolts potentially loosening due to vibration, this invention incorporates an automatic protection mechanism into its tool fixing structure. When the mounting bolts loosen, the pre-stretched elastic element immediately drives the splined housing, along with the tool holder body and boring tool insert, to retract slightly backward. This allows the cutting edge to actively detach from the workpiece's machining surface, preventing irreversible damage such as scratches or overcutting to the machined inner wall caused by tool displacement. Simultaneously, during the loosening process, the limiting element remains positioned against the stepped surface of the tool holder body under the action of the spring, ensuring that the tool holder body does not accidentally separate from the main body. This provides time for downtime for tightening or replacement, improving the safety of the machining process and the workpiece qualification rate.
[0019] 3. In this invention, the elastic force of spring one will drive the sliding rod to reset, so that the limiting post on the connecting ring is re-inserted into the corresponding limiting hole, forming a circumferential fixation, preventing the threaded rod from rotating unexpectedly due to external vibration or other reasons, thereby ensuring the dimensional accuracy and repeatability of the machining, and extending the overall service life of the tool. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of an alloy cutting tool assembly and a tool holder according to the present invention; Figure 2 This is a cross-sectional view of the blade body in this invention; Figure 3 This is a cross-sectional view of the movable shaft in this invention. Figure 4 This is a cross-sectional view of the mounting ring and adjusting knob in this invention; Figure 5 This is a schematic diagram of the connecting ring and the limiting post in this invention; Figure 6 This is a cross-sectional view of the spline sleeve and spline shell in this invention. Figure 7 This is a cross-sectional view of the connecting sleeve in this invention; Figure 8 This is a cross-sectional view of the connecting sleeve and the limiting member in this invention; Figure 9 This is a schematic diagram of the tool holder body and boring tool insert in this invention.
[0021] In the diagram: 1. Tool body; 2. Movable shaft; 3. Threaded sleeve; 4. Mounting ring; 5. Threaded rod; 6. Adjusting knob; 7. Sliding rod; 8. Block; 9. Limiting plate; 10. Fixing ring; 11. Sliding component; 12. Spring one; 13. Sliding column; 14. Extrusion plate; 15. Arc plate; 16. Locking bolt; 17. Connecting ring; 18. Limiting column; 19. Limiting hole; 20. Spline sleeve; 21. Spline shell; 22. Elastic component; 23. Connecting sleeve; 24. Guide column; 25. Limiting component; 26. Spring two; 27. Tool holder body; 28. Boring tool insert; 29. Mounting bolt; 30. Extrusion ring; 31. Step surface one; 32. Step surface two. Detailed Implementation
[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0024] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.
[0025] This invention provides an alloy cutting tool assembly, such as Figures 1-4 As shown, it includes: a tool body 1, a movable shaft 2, a threaded sleeve 3, a mounting ring 4, a threaded rod 5, an adjusting knob 6, a sliding rod 7, a plug 8, a limiting plate 9, a fixing ring 10, a sliding component 11, a spring 12, a limiting assembly, and a tool fixing structure; The cutter body 1 has a guide hole in the middle. A movable shaft 2 is slidably connected to the guide hole of the cutter body 1. A threaded sleeve 3 is fixedly connected to one side of the movable shaft 2. A mounting ring 4 is fixedly connected to the guide hole of the cutter body 1. A threaded rod 5 is rotatably connected to the mounting ring 4. The threaded rod 5 is threadedly connected to the threaded sleeve 3. An adjusting knob 6 is fixedly connected to the threaded rod 5. A hexagonal blind hole is opened at one end of the threaded rod 5. A sliding rod 7 is slidably connected to the middle of the threaded rod 5. A blocking block 8 is fixedly connected to one end of the sliding rod 7. The blocking block 8 is located at the hexagonal corner of the threaded rod 5. The sliding mechanism is located within the blind hole; the limiting disc 9 is fixed to the other end of the sliding rod 7; a fixing ring 10 is fixed inside the threaded rod 5; the sliding rod 7 and the fixing ring 10 are slidably connected; the threaded rod 5 is provided with a through groove; a sliding element 11 is slidably connected inside the through groove of the threaded rod 5; a spring 12 is fixed between the sliding element 11 and the fixing ring 10; the limiting assembly is located on the movable shaft 2 and is used to squeeze and limit the limiting disc 9; the tool fixing structure is located on the movable shaft 2 and is used to install and fix the alloy tool.
[0026] In use, when adjustment knob 6 needs to be rotated for adjustment, the hexagonal wrench is used to press the plug 8. The plug 8 moves along the hexagonal blind hole, and the plug 8 drives the sliding rod 7 to move along the threaded rod 5. The sliding rod 7 drives the sliding member 11 to move synchronously, and the spring 12 is compressed. The sliding rod 7 drives the limit plate 9 to move. During the above process, the hexagonal wrench has been inserted into the hexagonal blind hole of the threaded rod 5. By rotating the hexagonal wrench, the adjustment knob 6 is driven to rotate circumferentially. The adjustment knob 6 and the threaded rod 5 rotate synchronously, thereby driving the threaded sleeve 3 through the thread, so that the movable shaft 2 moves along the cutter body 1.
[0027] like Figures 2-5 As shown, the limiting assembly includes: a sliding post 13, a pressing plate 14, an arc plate 15, a locking bolt 16, a connecting ring 17, a limiting post 18, and a limiting hole 19; Two sliding columns 13 are provided, and the sliding columns 13 are slidably connected to the movable shaft 2; the extrusion plate 14 is fixed to the two sliding columns 13, the extrusion plate 14 is located outside the movable shaft 2 and is slidably connected to the blade body 1; the arc plate 15 is fixed to the two sliding columns 13, and the arc plate 15 is located inside the movable shaft 2; the center of the arc plate 15 coincides with the center of the limiting plate 9, the inner wall of the arc plate 15 is provided with a rubber gasket, and the blade body 1 is threadedly connected with a locking bolt 16, the locking bolt 16 abuts against the extrusion plate 14; the sliding part 11 is fixedly connected with a connecting ring 17, the connecting ring 17 is fixedly connected with a circumferentially spaced limiting column 18, the side of the connecting ring 17 away from the adjusting knob 6 is provided with a circumferentially spaced limiting hole 19, the limiting column 18 and the limiting hole 19 are mutually limiting fit; the adjusting knob 6 is provided with scale lines of the interval division, and the number of limiting holes 19 and the number of limiting columns 18 are the same as the number of scale lines of the adjusting knob 6.
[0028] Scenario 1: First turn the locking bolt 16 The locking bolt 16 no longer presses against the pressing plate 14, and the arc plate 15 no longer presses against the limiting plate 9. When the hexagonal bolt is inserted into the hexagonal blind hole of the threaded rod 5, the sliding rod 7 slides along the threaded rod 5, and the hexagonal plate is inserted into the hexagonal blind hole of the threaded rod 5.
[0029] Scenario 2: The locking bolt 16 was not turned first. The locking bolt 16 is always in contact with the pressing plate 14. The pressing plate 14 presses the arc plate 15 through the sliding column 13. The rubber gasket on the inner wall of the arc plate 15 presses the limiting plate 9. When the hex wrench is inserted into the hexagonal blind hole of the threaded rod 5, the sliding rod 7 cannot slide. The plug 8 seals the hexagonal blind hole of the threaded rod 5, so the hex wrench cannot rotate the threaded rod 5.
[0030] When the sliding rod 7 moves along the threaded rod 5, the sliding rod 7 drives the connecting ring 17 to move synchronously through the sliding member 11. The connecting ring 17 drives the limiting post 18 to move, and the limiting post 18 moves out of the limiting hole 19 of the connecting ring 17. When the threaded rod 5 is rotated, the threaded rod 5 drives the limiting post 18 to rotate together through the sliding member 11 and the connecting ring 17, thereby adjusting the position of the movable shaft 2. When the hexagonal wrench is removed from the hexagonal blind hole of the threaded rod 5, under the elastic force of the spring 12, the sliding rod 7 drives the sliding member 11 to reset, so that the limiting post 18 is reinserted into the limiting hole 19. By using the cooperation of the limiting post 18 and the limiting hole 19, the position of the threaded rod 5 is limited, thereby improving the stability of the movable shaft 2 during use.
[0031] like Figure 3 and Figures 6-9 As shown, the tool fixing structure includes: spline sleeve 20, spline shell 21, elastic element 22, connecting sleeve 23, guide post 24, limiting element 25, and spring 26; Spline sleeve 20 is fixed to movable shaft 2. Spline sleeve 20 is splined to spline shell 21. Elastic element 22 is fixed between spline shell 21 and movable shaft 2. Connecting sleeve 23 is fixed to spline shell 21. Connecting sleeve 23 is fixed to circumferentially spaced guide post 24. Guide post 24 is slidably connected to limit member 25. Spring 26 is fixed between limit member 25 and connecting sleeve 23. Limit member 25 is L-shaped, passes through connecting sleeve 23 and has an inclined surface.
[0032] like Figures 6-9 As shown, a tool holder, using the aforementioned alloy tool assembly, includes: a tool holder body 27, a boring tool insert 28, a mounting bolt 29, a compression ring 30, a step surface one 31, and a step surface two 32; The tool holder body 27 is sleeved on the connecting sleeve 23, and the tool holder body 27 is limited to the splined shell 21; the boring tool insert 28 is detachably connected to the tool holder body 27; the tool holder body 27 has an installation thread 29 inserted in the middle, the installation bolt 29 is threaded to the splined shell 21, the installation bolt 29 abuts against the movable shaft 2, and the installation bolt 29 is fixed to a compression ring 30, which abuts against the limiting member 25; the tool holder body 27 is provided with a stepped surface 31 and a stepped surface 32, the stepped surface 31 is limited by the limiting member 25, and the nut of the installation bolt 29 is limited by the stepped surface 32, the stepped surface 31 and the stepped surface 32 are stepped.
[0033] When installing the boring bar insert 28, first insert the tool holder body 27 into the connecting sleeve 23, then insert the mounting bolt 29 into the threaded shell and rotate it. The mounting bolt 29 rotates along the splined shell 21 and abuts against the movable shaft 2. As the mounting bolt 29 rotates, the splined shell 21 slides along the splined sleeve 20, and at the same time, the elastic element 22 is stretched. When the mounting bolt 29 moves along the splined shell 21, the mounting bolt 29 presses against the inclined surfaces of the four limiting elements 25 through the compression ring 30. The four limiting elements 25 slide along the connecting sleeve 23, and at the same time, the second spring 26 is compressed. The limiting elements 25 limit the step surface 31 of the tool holder body 27. As the mounting bolt 29 is tightened, the nut of the mounting bolt 29 presses against the step surface 32 of the tool holder body 27, thus installing the boring bar insert 28 onto the tool holder body 27.
[0034] Working principle: In use, the tool body 1 is mounted on the machine tool spindle. During use, the workpiece is boring using a boring tool. If the mounting bolt 29 becomes loose due to vibration between the workpiece and the boring tool insert 28, the mounting bolt 29 rotates in the opposite direction. Under the elastic force of the elastic element 22, the gap between the spline shell 21 and the spline sleeve 20 is reduced. During this process, the spline shell 21 drives the tool holder body 27 and the parts on it to move. The spline shell 21 drives the boring tool insert 28 away from the workpiece's machining surface through the tool holder body 27. The movement of the boring tool insert 28 away from the workpiece's machining surface reduces the risk of irreversible damage to the workpiece's machining surface caused by the loosening of the mounting bolt 29. By moving the boring tool insert 28 away from the workpiece's machining surface, the workpiece can be machined again.
[0035] When the mounting bolt 29 is loosened, it drives the compression ring 30 to move, which in turn compresses the limiting member 25. The limiting member 25 then limits the tool holder body 27. When the tool holder body 27 needs to be disassembled, the mounting bolt 29 is rotated, causing the compression ring 30 to move until it loses contact with the limiting member 25. Under the elastic force of the second spring 26, the limiting member 25 returns to its original position along the guide post 24, and the limiting member 25 releases its restriction on the tool holder body 27. The tool holder body 27 is then disassembled from the splined shell 21. Through the cooperation of the limiting member 25 and the tool holder body 27, the tool holder body 27 remains connected to the splined shell 21 even after the mounting bolt 29 is loosened.
[0036] When adjustment is required, first turn the locking bolt 16 to release the pressure on the pressing plate 14. At the same time, the arc plate 15 no longer presses on the limiting plate 9. Therefore, insert the hexagonal wrench into the hexagonal blind hole of the threaded rod 5. The plug 8 drives the sliding rod 7 to slide along the threaded rod 5. The sliding rod 7 drives the connecting ring 17 and the limiting post 18 to move through the sliding member 11. The limiting post 18 moves out of the limiting hole 19, releasing the fixation on the threaded rod 5. Then turn the hexagonal wrench to make the threaded rod 5 rotate circumferentially. The threaded rod 5, through its cooperation with the threaded sleeve 3, drives the movable shaft 2 and the parts on it to slide along the guide hole of the tool body 1, thus completing the position adjustment of the boring tool insert 28.
[0037] After adjustment, the sliding rod 7 is reset under the elastic force of spring 12, the limiting post 18 is inserted into the limiting hole 19, and then the locking bolt 16 is tightened again, so that the arc plate 15 presses the limiting plate 9 again, fixing the sliding rod 7 and the block 8. This prevents the threaded rod 5 from being rotated without the locking bolt 16 being turned, which would cause wear on the threads between the threaded rod 5 and the threaded sleeve 3 and reduce the adjustment accuracy.
[0038] In all the solutions mentioned above, for connections between two components, welding, bolt and nut connection, bolt or screw connection, or other known connection methods can be selected according to the actual situation. These will not be elaborated here. For all fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention.
Claims
1. An alloy cutting tool assembly, characterized in that, include: The cutter body (1) has a guide hole in the middle; The movable shaft (2) is slidably connected to the guide hole of the cutter body (1). A threaded sleeve (3) is fixedly connected to one side of the movable shaft (2). An installation ring (4) is fixedly connected to the guide hole of the cutter body (1). A threaded rod (5) is rotatably connected to the installation ring (4). The threaded rod (5) is threadedly connected to the threaded sleeve (3). Adjustment knob (6) is fixed to the threaded rod (5). One end of the threaded rod (5) is provided with a hexagonal blind hole. A sliding rod (7) is slidably connected to the middle of the threaded rod (5). A block (8) is fixed to one end of the sliding rod (7). The block (8) slides in the hexagonal blind hole of the threaded rod (5). A limiting plate (9) is fixed to the other end of the sliding rod (7). A fixing ring (10) is fixed inside the threaded rod (5). The sliding rod (7) is slidably connected to the fixing ring (10). The threaded rod (5) is provided with a through groove. A sliding member (11) is slidably connected inside the through groove of the threaded rod (5). A spring (12) is fixed between the sliding member (11) and the fixing ring (10). A limiting component is provided on the movable shaft (2) for squeezing and limiting the limiting disk (9); A tool fixing structure is provided on the movable shaft (2), and the tool fixing structure is used to install and fix the alloy tool.
2. The alloy cutting tool assembly according to claim 1, characterized in that, The limiting component includes: Two sliding columns (13) are provided, and the sliding columns (13) are slidably connected to the movable shaft (2). The extrusion plate (14) is fixed to the two sliding columns (13). The extrusion plate (14) is located outside the movable shaft (2) and is slidably connected to the blade body (1). An arc-shaped plate (15) is fixed to two sliding columns (13), and the arc-shaped plate (15) is located inside the movable shaft (2).
3. The alloy cutting tool assembly according to claim 2, characterized in that, The center of the arc plate (15) coincides with the center of the limiting plate (9). The inner wall of the arc plate (15) is provided with a rubber gasket, and the blade body (1) is threadedly connected to a locking bolt (16). The locking bolt (16) abuts against the extrusion plate (14).
4. The alloy cutting tool assembly according to claim 2, characterized in that, The sliding member (11) is fixedly connected to a connecting ring (17), and the connecting ring (17) is fixedly connected to a limiting post (18) with a circumferential interval. A limiting hole (19) with a circumferential interval is provided on the side of the connecting ring (17) away from the adjusting knob (6). The limiting post (18) and the limiting hole (19) are in a limiting fit.
5. An alloy cutting tool assembly according to claim 4, characterized in that, The adjustment knob (6) is provided with interval scale lines, and the number of the limiting holes (19) and the number of the limiting posts (18) are the same as the number of scale lines on the adjustment knob (6).
6. The alloy cutting tool assembly according to claim 1, characterized in that, The tool fixing structure includes: A spline sleeve (20) is fixedly connected to the movable shaft (2). The spline sleeve (20) is splinedly connected to a spline shell (21). An elastic element (22) is fixedly connected between the spline shell (21) and the movable shaft (2). A connecting sleeve (23) is fixed to the spline shell (21). The connecting sleeve (23) is fixed to a guide post (24) with circumferential intervals. The guide post (24) is slidably connected to a limiting member (25). A spring (26) is fixed between the limiting member (25) and the connecting sleeve (23).
7. An alloy cutting tool assembly according to claim 6, characterized in that, The limiting member (25) is L-shaped, and the limiting member (25) passes through the connecting sleeve (23) and has an inclined surface.
8. A tool holder, employing an alloy tool assembly according to claim 6, characterized in that, include: Tool holder body (27); sleeved on the connecting sleeve (23), the tool holder body (27) and the splined shell (21) are in a limiting fit; The boring tool insert (28) is detachably connected to the tool holder body (27).
9. A tool holder according to claim 8, characterized in that, The tool holder body (27) has an installation thread (29) inserted in the middle. The installation bolt (29) is threaded to the spline shell (21). The installation bolt (29) abuts against the movable shaft (2). The installation bolt (29) is fixedly connected to a compression ring (30). The compression ring (30) abuts against the limiting member (25).
10. A tool holder according to claim 8, characterized in that, The tool holder body (27) is provided with a step surface one (31) and a step surface two (32). The step surface one (31) is limited by the limiting member (25), and the nut of the mounting bolt (29) is limited by the step surface two (32). The step surface one (31) and the step surface two (32) are stepped.