Vibration reduction cutter bar for numerical control vehicle
By introducing a combination structure of a damping inner tube, a pusher plate, a coordinating vibration rod, and a viscous damping fluid into the vibration damping tool holder for CNC lathes, the problem that the vibration damping effect of existing vibration damping tool holders depends on the position of the resonant rod is solved, achieving more stable absorption and transmission of vibration energy, and improving machining accuracy and tool life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 杨小冬
- Filing Date
- 2025-06-20
- Publication Date
- 2026-05-26
AI Technical Summary
Existing CNC lathe vibration damping tool holders passively dampen vibrations through resonant rods. The damping effect depends on the movement position of the resonant rods, and the single passive method cannot meet the damping requirements in practical applications, resulting in poor damping performance.
The device employs a combination structure of a damping inner tube, a pusher disc, a coordinating vibration rod, a vibration-absorbing spring, and a pressure-bearing disc within the tool holder body. Combined with viscous damping fluid, active vibration reduction is achieved through the movement of the pusher disc and the flow of the viscous damping fluid. Furthermore, the uniform transmission and absorption of vibration energy are ensured through a sealed slide and a uniform force column.
It effectively buffers and dissipates vibration stress, improves tool stability and accuracy, ensures machining quality and extends tool life, avoids vibration damping component misalignment, and achieves a more stable vibration damping effect.
Smart Images
Figure CN224273350U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of parts processing technology, specifically a vibration damping tool bar for CNC lathes. Background Technology
[0002] Vibration-damping tool holders for CNC lathes are important tools used in parts machining, playing a crucial role on CNC lathes. They effectively reduce tool holder vibration during machining, improving machining quality and efficiency, and reducing the probability of tool damage. In CNC lathe machining, improving machining accuracy and efficiency and extending tool life are always key goals. Faced with complex and precise machining tasks, high-frequency vibration has become a major factor restricting machining quality and efficiency. Currently, in the machining process, slender shell-like parts with a length-to-diameter ratio exceeding 5 and thin walls are frequently encountered. During the machining of internal cavities, the excessive length of the tool holder causes vibration during machining. The larger the length-to-diameter ratio and the thinner the wall, the more severe the vibration. As a result, the dimensional accuracy and surface roughness of the parts cannot meet the user's requirements. Existing technology discloses a vibration-damping tool holder for CNC lathes, application number: 202421289391.9. The vibration-damping tool holder for CNC lathes provided by this prior art can reduce tool holder vibration during machining by setting a vibration damping structure and through the cooperation of the resonant rod in the vibration damping structure and the oil reservoir.
[0003] Current vibration-damping tool holders achieve vibration reduction by passively absorbing energy through a resonant rod inside the tool holder. The vibration reduction effect of this method depends on the passive movement of the resonant rod, and the vibration reduction effect is low when the position of the resonant rod deviates. Furthermore, a single passive vibration reduction method cannot guarantee the vibration reduction requirements of the vibration-damping tool holder in actual application. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this utility model provides a vibration-damping tool holder for CNC lathes. It solves the problem that current vibration-damping tool holders achieve passive vibration reduction and energy absorption solely through an internal resonant rod. The vibration reduction effect of this method depends on the passive movement of the resonant rod, and the effect is poor when the resonant rod's position shifts. Furthermore, a single passive vibration reduction method cannot guarantee the vibration reduction requirements of the tool holder in actual applications.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a vibration damping tool holder for CNC lathes, comprising a tool holder body, one end of which is connected to a clamping tool handle, and the other end is detachably connected to a tool holder, with a tool head fixedly connected to the end of the tool holder. A vibration damping inner tube is integrally embedded inside the tool holder body, and a pusher plate is slidably connected to the inner cavity of the vibration damping inner tube. A cooperating vibration rod is fixedly connected to the middle of one end of the pusher plate, and a vibration-absorbing spring is fixedly connected to the end of the vibration damping inner tube. The same-direction ends of the cooperating vibration rod and the vibration-absorbing spring are both fixedly connected to the middle of the pressure-bearing disc. A sealing slide is provided at the connection between the inner end of the vibration damping inner tube and the cooperating vibration rod.
[0006] The top of the tool holder body is connected to an injection pipe that communicates with the inside of the vibration damping inner tube. A one-way valve is provided at the end of the injection pipe. Four sets of compression channels are connected at equal angles inside the push plate, and four sets of extension channels are opened inside the push plate at positions offset from the four sets of compression channels.
[0007] The tool holder body has a square inner groove at one end near the tool holder. The end of the tool holder is connected to a fitting block. The end of the fitting block is fixedly connected to a bonding plate near the tool holder body. The ends of the cooperating vibrating rod and the pressure plate are both fixedly connected to pressure plates, and the edge of the pressure plate is tightly fitted to the pressure plate through a uniform force column.
[0008] As a preferred technical solution for a CNC automotive vibration damping tool holder according to this utility model, the cavity inside the vibration damping inner tube is filled with viscous damping fluid, the cooperating vibration rod slides inside the sealed slide, and the two ends of the vibration absorbing spring are respectively connected to the ends of the vibration damping inner tube and the pressure bearing disc.
[0009] As a preferred technical solution for a CNC automotive vibration damping tool holder according to this utility model, the pressure-bearing disc drives the cooperating vibration rod and the push disc to move, the pressure-bearing disc compresses the vibration-absorbing spring, and the compression channel and extension channel inside the push disc are both tapered in cross-section and are opened in opposite directions.
[0010] As a preferred technical solution for a CNC automotive vibration damping tool holder according to this utility model, the bonding plate and the pressure plate are tightly bonded together, and the pressure plate is tightly bonded to the pressure disk through the uniform force column at its edge.
[0011] As a preferred technical solution for a vibration damping tool holder for CNC vehicles according to this utility model, both the tool holder body and the mating block are provided with pin grooves. A pin block is mated and connected inside the pin groove, and a connecting bolt is connected through the pin block. A limit plate is fixedly connected to the top of the mating block.
[0012] As a preferred technical solution for a vibration damping tool holder for CNC vehicles according to this utility model, after the mating block is fully inserted into the square inner groove, the positions of the pin groove inside the tool holder body and the mating block correspond to each other. The pin block is mated and connected in the pin groove inside the tool holder body and the mating block. The sum of the depths of the pin groove inside the tool holder body and the mating block is equal to the height of the pin block.
[0013] As a preferred technical solution for a CNC automotive vibration damping tool holder according to this utility model, the mating block has a threaded hole inside, the connecting bolt passes through the pin block and is threaded into the threaded hole, and both sides of the limiting plate are detachably connected to the top of the tool holder body by screws.
[0014] Compared with the prior art, this utility model provides a vibration damping tool holder for CNC lathes, which has the following beneficial effects:
[0015] 1. By incorporating a damping inner tube, a pusher disc, a cooperating vibration rod, a vibration-absorbing spring, and a pressure-bearing disc inside the tool holder body, the vibration stress can be transmitted to the pressure-bearing disc when the tool head and tool holder are subjected to vibration during machining. This causes the cooperating vibration rod to move, thereby compressing the vibration-absorbing spring and achieving initial buffering of vibration stress. Viscous damping fluid is injected into the damping inner tube through an injection pipe and a one-way valve. As the cooperating vibration rod moves, it drives the pusher disc to move along the inner wall of the damping inner tube. The pusher disc then squeezes the viscous damping fluid inside the damping inner tube. The sealing slide ensures the sealing of the connection between the cooperating vibration rod and the damping inner tube, further absorbing vibration stress.
[0016] By utilizing the compression and extension channels inside the push plate, with the cross-sections of the compression and extension channels being tapered in different directions, the viscous damping fluid is facilitated to pass through the compression channel when the push plate compresses it, and to pass through the extension channel when the push plate returns to its original position. Through the displacement of the push plate and the compression and extension process of the viscous damping fluid, the vibration stress is buffered and consumed to the greatest extent, reducing the vibration of the tool holder and enabling the tool to perform machining operations stably and accurately.
[0017] 2. By setting a square inner groove at the end of the tool holder body, combined with the mating block at the end of the tool holder, it is convenient to quickly and accurately align and connect the tool holder and the tool holder body. Furthermore, by setting corresponding pin slots inside the tool holder body and the mating block, after the pin is inserted into the pin slot, it is convenient to further position and limit the connection position between the tool holder and the tool holder body. Combined with the connecting bolt and the limiting plate, it is convenient to lock and fix the tool holder body and the mating block in a rigid fixing manner, so that the tool holder and the tool holder body form an integral structure after being connected, which facilitates the stable transmission of vibration stress and ensures the stability of the tool holder and the tool head in actual operation.
[0018] Meanwhile, by utilizing the bonding plate, pressure plate, and uniform force column, when the tool is subjected to vibration stress, the vibration stress can be distributed and transferred to the pressure disk through the pressure plate and uniform force column, thereby achieving uniform transmission of vibration stress and avoiding the phenomenon of uneven force on the damping component causing its own movement deviation, thus ensuring the actual vibration reduction effect of the tool holder. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of this utility model.
[0020] Figure 2 This is a schematic diagram of the internal structure of the tool holder body of this utility model.
[0021] Figure 3 This is a schematic diagram of the structure of the vibration-damping inner tube of this utility model.
[0022] Figure 4 This is a schematic diagram of the structure of the push plate of this utility model.
[0023] Figure 5 This is a schematic diagram of the pin block of this utility model.
[0024] In the diagram: 1. Tool holder body; 2. Tool holder; 3. Tool head; 4. Tool clamping handle; 5. Vibration damping inner tube; 6. Pushing disc; 7. Coordinating vibration rod; 8. Vibration absorbing spring; 9. Pressure bearing disc; 10. Sealing slide; 11. Injection pipe; 12. One-way valve; 13. Compression channel; 14. Extension channel; 15. Square inner groove; 16. Fitting block; 17. Pin groove; 18. Pin block; 19. Connecting bolt; 20. Limiting plate; 21. Adhesive plate; 22. Pressure bearing plate; 23. Uniform force column. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.
[0026] In the description of this utility model, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.
[0027] In the description of this utility model, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.
[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0029] Example: Please refer to Figure 1-5 This utility model provides the following technical solution: a vibration-damping tool holder for CNC lathes, comprising a tool holder body 1, a tool holder 4 connected to one end of the tool holder body 1, a tool holder 2 detachably connected to the inner side of the other end, and a tool head 3 fixedly connected to the end of the tool holder 2, a vibration-damping inner tube 5 integrally embedded inside the tool holder body 1, a pusher 6 slidably connected to the inner cavity of the vibration-damping inner tube 5, a cooperating vibration rod 7 fixedly connected to the middle of one end of the pusher 6, and a vibration-absorbing spring 8 fixedly connected to the end of the vibration-damping inner tube 5, the cooperating vibration rod 7 and the vibration-absorbing spring... The same-direction ends of 8 are fixedly connected to the middle of the pressure-bearing disc 9. A sealing slide 10 is provided at the connection between the inner end of the vibration-damping inner tube 5 and the cooperating vibration rod 7. The cavity inside the vibration-damping inner tube 5 is filled with viscous damping fluid. The cooperating vibration rod 7 slides inside the sealing slide 10. The two ends of the vibration-absorbing spring 8 are respectively connected to the ends of the vibration-damping inner tube 5 and the pressure-bearing disc 9. The sealing slide 10 ensures the sealing of the connection between the cooperating vibration rod 7 and the vibration-damping inner tube 5. By compressing the vibration-absorbing spring 8, the vibration stress is initially buffered.
[0030] The top of the blade body 1 is connected to an injection pipe 11 that communicates with the inside of the vibration damping inner tube 5. A one-way valve 12 is provided at the end of the injection pipe 11. Four sets of compression channels 13 are connected at equal angles inside the push disk 6. Four sets of extension channels 14 are opened inside the push disk 6 at positions offset from the four sets of compression channels 13. The pressure-bearing disc 9 drives the cooperating vibration rod 7 and the push disk 6 to move. The pressure-bearing disc 9 compresses the vibration-absorbing spring 8. The cross-sections of the compression channels 13 and extension channels 14 opened inside the push disk 6 are both conical, and their opening directions are opposite. The viscous damping fluid inside the vibration damping inner tube 5 is squeezed by the push disk 6 to absorb the vibration stress. When the push disk 6 squeezes the viscous damping fluid, it is convenient for the viscous damping fluid to pass through the compression channel 13. When the push disk 6 is reset, it is convenient for the viscous damping fluid to pass through the extension channel 14. In this way, the displacement of the push disk 6 can buffer and consume the vibration stress to the greatest extent.
[0031] A square inner groove 15 is opened inside the end of the tool holder 1 near the tool holder 2. The end of the tool holder 2 is connected to a fitting block 16. The end of the fitting block 16 near the tool holder 1 is fixedly connected to a bonding plate 21. The ends of the cooperating vibration rod 7 and the pressure plate 9 are both fixedly connected to a pressure plate 22. The edge of the pressure plate 22 is tightly fitted to the pressure plate 9 through a uniform force column 23. The bonding plate 21 is tightly fitted to the pressure plate 22. The pressure plate 22 is tightly fitted to the pressure plate 9 through the uniform force column 23 at its edge. When the tool is subjected to vibration stress, the vibration stress can be distributed and transferred to the pressure plate 9 by the pressure plate 22 and the uniform force column 23, thereby realizing the uniform transfer of vibration stress.
[0032] Both the tool holder body 1 and the mating block 16 have pin grooves 17 inside. A pin block 18 is fitted into the pin groove 17. After the mating block 16 is fully inserted into the square inner groove 15, the positions of the pin grooves 17 inside the tool holder body 1 and the mating block 16 correspond, and the pin block 18 is fitted into the pin grooves 17 inside the tool holder body 1 and the mating block 16. The sum of the depths of the pin grooves 17 inside the tool holder body 1 and the mating block 16 is equal to the height of the pin block 18. After the pin block 18 is inserted into the pin groove 17, it facilitates the insertion of the tool... The connection position between the seat 2 and the tool holder body 1 is further defined. A connecting bolt 19 is connected through the inside of the pin block 18. A limiting plate 20 is fixedly connected to the top of the mating block 16. A threaded hole is opened inside the mating block 16. The connecting bolt 19 passes through the pin block 18 and is threaded into the threaded hole. Both sides of the limiting plate 20 are detachably connected to the top of the tool holder body 1 by screws. The tool holder body 1 and the mating block 16 are locked and fixed in a rigid manner by the connecting bolt 19 and the limiting plate 20.
[0033] The working principle and usage process of this utility model are as follows: In actual assembly and application, the clamping handle 4 facilitates the clamping and installation between the tool holder body 1 and the clamping components of the CNC lathe. When the tool head 3 is connected to the tool holder body 1 through the tool holder 2, the square inner groove 15 provided at the end of the tool holder body 1, combined with the mating block 16 at the end of the tool holder 2, facilitates the quick and accurate alignment and connection between the tool holder 2 and the tool holder body 1. Combined with the pin groove 17 corresponding to the position provided inside the tool holder body 1 and the mating block 16, after the pin block 18 is inserted into the pin groove 17, the connection position between the tool holder 2 and the tool holder body 1 is positioned and limited.
[0034] After the tool holder 2 and the tool bar body 1 are initially positioned, the tool bar body 1 and the wedge block 16 are further locked and fixed in a rigid manner by the connecting bolt 19 and the limiting plate 20, so that the tool holder 2 and the tool bar body 1 form an integral structure after being connected, which facilitates the stable transmission of vibration stress and ensures the stability of the tool holder 2 and the tool head 3 in actual operation. This connection method keeps the tool holder 2 and the tool bar body 1 in a rigid connection state after being connected, and this method also makes it easy to disassemble the tool holder 2 and the tool bar body 1, which is convenient for replacing the tool holder 2 and the tool head 3.
[0035] When the cutting head 3 is subjected to vibration stress during processing, the vibration stress is distributed and transmitted to the pressure plate 22 and the uniform force column 23 to the pressure plate 9, so that the vibration stress is transmitted evenly and the vibration damping component is not subjected to uneven force and thus avoids the phenomenon of its own movement deviation. This ensures the actual vibration damping effect of the cutting head. After the pressure plate 9 is subjected to force, the pressure plate 9 drives the cooperating vibration rod 7 to move, compressing the vibration absorption spring 8, thus achieving preliminary buffering of vibration stress.
[0036] Based on this, viscous damping fluid is injected into the vibration damping inner tube 5 through the injection pipe 11 and the one-way valve 12. During the movement of the cooperating vibrating rod 7, the pushing disk 6 is driven to move along the inner wall of the vibration damping inner tube 5. The pushing disk 6 squeezes the viscous damping fluid inside the vibration damping inner tube 5. The sealing slide 10 ensures the sealing of the connection between the cooperating vibrating rod 7 and the vibration damping inner tube 5, thereby further absorbing the vibration stress.
[0037] When the pusher disc 6 squeezes the viscous damping fluid inside the vibration damping inner tube 5, the viscous damping fluid passes through the compression channel 13 and extension channel 14 opened inside the pusher disc 6. The compression channel 13 and extension channel 14 have tapered cross sections with different directions. When the pusher disc 6 squeezes the viscous damping fluid, the viscous damping fluid passes through the compression channel 13. When the pusher disc 6 returns to its original position, the viscous damping fluid passes through the extension channel 14. In this way, through the displacement of the pusher disc 6 and the process of the viscous damping fluid being compressed and passed through the compression channel 13 and extension channel 14, the vibration stress is buffered and consumed to the greatest extent, reducing the vibration of the tool holder.
[0038] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A vibration-damping tool bar for numerically controlled machine tools, comprising a tool bar body (1), characterized in that: One end of the blade body (1) is connected to a clamping handle (4), and the other end is detachably connected to a blade holder (2). The blade holder (2) is fixedly connected to a blade head (3). The blade body (1) is embedded in a vibration damping inner tube (5). The inner cavity of the vibration damping inner tube (5) is slidably connected to a pusher disc (6). The middle of one end of the pusher disc (6) is fixedly connected to a cooperating vibration rod (7). The end of the vibration damping inner tube (5) is fixedly connected to a vibration absorbing spring (8). The ends of the cooperating vibration rod (7) and the vibration absorbing spring (8) are fixedly connected to the middle of the pressure bearing disc (9). A sealing slide (10) is provided at the connection between the inner end of the vibration damping inner tube (5) and the cooperating vibration rod (7). The top of the cutter body (1) is connected to an injection pipe (11) that communicates with the inside of the vibration damping inner tube (5). A one-way valve (12) is provided at the end of the injection pipe (11). Four sets of compression channels (13) are connected at equal angles inside the push plate (6). Four sets of extension channels (14) are opened inside the push plate (6) at positions offset from the four sets of compression channels (13). The tool holder body (1) has a square inner groove (15) at one end near the tool holder (2). The end of the tool holder (2) is connected to a fitting block (16). The end of the fitting block (16) is fixedly connected to a bonding plate (21) near the tool holder body (1). The ends of the cooperating vibrating rod (7) and the pressure plate (9) are both fixedly connected to a pressure plate (22). The edge of the pressure plate (22) is tightly fitted to the pressure plate (9) through a uniform force column (23).
2. The vibration-damping tool bar according to claim 1, characterized in that: The cavity inside the damping inner tube (5) is filled with viscous damping fluid. The cooperating vibration rod (7) slides inside the sealing slide (10). The two ends of the vibration-absorbing spring (8) are respectively connected to the ends of the damping inner tube (5) and the pressure-bearing disc (9).
3. The vibration-damping tool bar according to claim 2, characterized in that: The pressure-bearing disc (9) drives the cooperating vibrating rod (7) and the pushing disc (6) to move. The pressure-bearing disc (9) compresses the vibration-absorbing spring (8). The compression channel (13) and extension channel (14) inside the pushing disc (6) are both conical in cross-section and are opened in opposite directions.
4. The vibration-damping tool bar according to claim 1, wherein: The bonding plate (21) is tightly bonded to the pressure plate (22), and the pressure plate (22) is tightly bonded to the pressure disk (9) through the uniform force column (23) at its edge.
5. The vibration-damping tool bar according to claim 1, wherein: The tool holder body (1) and the mating block (16) are both provided with pin grooves (17), and pin blocks (18) are mated and connected inside the pin grooves (17). A connecting bolt (19) is connected through the pin blocks (18), and a limit plate (20) is fixedly connected to the top of the mating block (16).
6. The vibration-damping tool bar according to claim 5, characterized in that: After the mating block (16) is fully inserted into the square inner groove (15), the positions of the pin groove (17) inside the tool holder body (1) and the mating block (16) correspond to each other. The pin block (18) is mated and connected in the pin groove (17) inside the tool holder body (1) and the mating block (16). The sum of the depths of the pin groove (17) inside the tool holder body (1) and the mating block (16) is equal to the height of the pin block (18).
7. The vibration-damping tool bar according to claim 5, wherein: The fitting block (16) has a threaded hole inside, the connecting bolt (19) passes through the pin block (18) and is threaded into the threaded hole, and both sides of the limiting plate (20) are detachably connected to the top of the tool holder body (1) by screws.