A vibration-damping tool mount for CNC machine tools
By introducing multiple anti-vibration structures and spherical cutting fluid nozzles into the tool mount, the problems of tool vibration and inaccurate cutting fluid supply are solved, resulting in higher machining accuracy, better cooling effect, and extended tool life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGJU PRECISION IND (HUAIAN) CO LTD
- Filing Date
- 2025-04-25
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional tool mounts cannot effectively reduce tool vibration during cutting, affecting machining accuracy and tool life. At the same time, inaccurate supply of cutting fluid affects cooling and chip removal.
It adopts multiple anti-vibration structures such as shock-absorbing rings, damping shock-absorbing blocks and spherical cutting fluid nozzles, combined with an adjustable angle design, to achieve effective vibration reduction of the cutting tool and precise cutting fluid spraying.
It improves machining accuracy, extends tool life, enhances cooling and chip removal, and improves machining quality.
Smart Images
Figure CN224274112U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of CNC machine tool accessories technology, specifically to a shockproof tool mounting base for CNC machine tools. Background Technology
[0002] In CNC machine tool machining, the performance of the tool mount has a crucial impact on machining accuracy and tool life. Traditional tool mounts, when fixing the tool, often fail to effectively reduce the vibration generated by the tool during cutting. This not only leads to decreased machining accuracy, increased dimensional deviations and surface roughness of the machined parts, but also accelerates tool wear, shortens tool life, and increases production costs. Simultaneously, the traditional tool mount's cutting fluid supply method also has shortcomings; the cutting fluid cannot be accurately and efficiently sprayed onto the contact area between the tool and the workpiece, affecting cooling and chip removal, further impacting machining quality. Therefore, developing a tool mount that effectively prevents vibration and provides a reasonable cutting fluid supply is of significant practical importance.
[0003] Chinese patent CN203197595U discloses a CNC tool holder with anti-vibration function, comprising a tool holder body, multiple bolts for fixing the tool, a ball bearing including a horn-shaped nozzle, a locking element for tightening the ball bearing, and multiple anti-vibration components to improve the tool fixing strength. The tool holder body includes a long through hole for inserting the tool, multiple screw holes on the side for bolts to be screwed in, multiple annular grooves recessed in the long through hole for the anti-vibration components to be engaged, a cooling hole extending to the front end face, a round seat hole formed at the top of the cooling hole for accommodating the ball bearing, and a conical seat hole adjacent to the round seat hole for the locking element to be screwed in. The anti-vibration components located in the annular grooves can further improve the fixing strength of the tool.
[0004] The technical solution provided by the above patent only uses the shock-absorbing components in the annular groove for vibration reduction, which has a poor effect on suppressing axial vibration. Utility Model Content
[0005] To solve the above problems, the present invention adopts the following technical solution.
[0006] A vibration-damping tool mount for a CNC machine tool includes a housing. A tool mounting cavity 1 is located in the middle of the housing. A mounting hole is located at the bottom of the mounting cavity 1, and the mounting hole is detachably connected to the mounting end of the tool. The tool tip extends out of the mounting cavity 1. Several damping rings are arranged inside the mounting cavity 1, and the damping rings contact the outer wall of the tool mounting end. Several mounting cavities 2 are symmetrically arranged at the front end of the housing with the mounting cavity 1 as the center. A cutting fluid nozzle is installed in each mounting cavity 2. A connection hole is provided on the side wall of the housing, and a liquid channel is provided between the connection hole and the mounting cavity 2. A liquid inlet pipe is detachably installed at the connection hole and connected to a cutting fluid supply device. A stepped surface 1 is also provided at the outward-facing end of the mounting hole, and a damping shock absorber 1 is arranged within the stepped surface 1. The damping block 1 has a through hole 1 in its middle. The outward end of the through hole 1 has a flared structure. The inward end of the mounting end has a plug rod in its middle. The connection between the plug rod and the mounting end has a conical contact surface that matches the outward end of the through hole. The outward end of the mounting cavity 1 has a stepped surface 2. The bottom of the stepped surface 2 has a damping block 2. The side wall of the stepped surface 2 is threaded with an end cap. The end cap has a through hole 2 in its middle. The end cap has a damping block 3 inside its middle. The inward end of the damping block 3 has a flared structure. The mounting end has a convex ring. The inward side of the convex ring contacts the damping block 2. The outward side of the convex ring has a conical structure and contacts the damping block 3.
[0007] Preferably, the cutting fluid nozzle has a spherical structure, including a sphere, with a liquid outlet hole in the middle of the sphere. The liquid outlet hole is a conical hole, with the outward-facing end being the end with a small diameter. The second mounting cavity is a spherical cavity.
[0008] Preferably, a sealing ring is provided on the inner wall of the outer end of the mounting cavity.
[0009] Preferably, a roller is horizontally arranged at the top of the spherical cavity, one end of which is connected to the output end of the first drive motor, and a turntable is arranged at the bottom of the spherical cavity, the bottom of which is connected to the output end of the second drive motor. Both the roller and the turntable are in contact with the outer surface of the sphere.
[0010] Preferably, the upper surface of the turntable has an arc-shaped concave structure.
[0011] Preferably, the upper surfaces of the roller and turntable are provided with anti-slip textures.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] This invention effectively reduces tool vibration during cutting by setting up multiple anti-vibration structures, including a damping ring, damping block one, damping block two, and damping block three, thereby improving machining accuracy and extending tool life.
[0014] The unique spherical cutting fluid nozzle 7 and adjustable angle structure of this invention enable the cutting fluid to be sprayed more accurately and efficiently onto the contact area between the cutting tool and the workpiece, enhancing the cooling and chip removal effects and further improving the machining quality. Attached Figure Description
[0015] Figure 1 This is a cross-sectional view of the overall structure of this utility model;
[0016] Figure 2 for Figure 1 Sectional view along line AA;
[0017] Figure 3 This is a partial cross-sectional view of the cutting fluid nozzle of this utility model;
[0018] Figure 4 This is a partial cross-sectional view of the cutting fluid nozzle of this utility model.
[0019] In the diagram: 1. Housing; 2. Tool mounting cavity one; 3. Mounting hole; 31. Step surface one; 32. Damping and vibration damping block one; 33. Through hole one; 4. Tool; 41. Mounting end; 411. Insert rod; 412. Conical contact surface; 413. Convex ring; 5. Vibration damping ring; 6. Mounting cavity two; 61. Sealing ring; 62. Roller; 63. Drive motor one; 64. Turntable; 65. Drive motor two; 7. Cutting fluid nozzle; 71. Ball; 72. Liquid outlet; 8. Connecting hole; 9. Liquid channel; 10. Liquid inlet pipe; 21. Step surface two; 22. Damping and vibration damping block two; 23. End cap; 231. Through hole two; 24. Damping and vibration damping block three; 241. Through hole three. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example
[0023] like Figure 1-4 As shown, in this embodiment, a vibration-damping tool mounting base for a CNC machine tool includes a housing 1. A tool mounting cavity 2 is provided in the middle of the housing 1. A mounting hole 3 at the bottom of the mounting cavity 2 is detachably connected to the mounting end 41 of a tool 4, with the tool tip extending out of the mounting cavity 2. Several damping rings 5 are provided inside the mounting cavity 2, contacting the outer wall of the mounting end 41 of the tool 4 to effectively buffer vibrations generated during tool operation. In this embodiment, the inner wall of the mounting hole 3 is provided with internal threads, and the outer wall of the mounting end 41 of the tool 4 is provided with external threads. The mounting hole 3 and the mounting end 41 of the tool 4 are threadedly connected. In other embodiments, a spring clip can also be used for detachable connection, which will not be elaborated here.
[0024] In this embodiment, a plurality of mounting cavities 6 are symmetrically arranged at the front end of the housing 1 with mounting cavity 1 as the center. The mounting cavity 6 is equipped with a cutting fluid nozzle 7. The connecting hole 8 on the side wall of the housing 1 is connected to the mounting cavity 6 through a liquid channel 9. A liquid inlet pipe 10 is detachably connected to the connecting hole 8. The liquid inlet pipe 10 is connected to the cutting fluid supply device to realize the supply of cutting fluid.
[0025] In this embodiment, a damping block 32 is provided in the stepped surface 31 at the outward end of the insertion hole 3. The through hole 33 in the middle of the damping block 32 has a flared structure at its outward end. The insertion rod 411 in the middle of the inward end of the tool mounting end 41 matches the tapered contact surface 412 of the mounting end 41 connection and the outward end of the through hole 33 to further enhance the shock absorption effect. The outer wall of the insertion rod 411 is provided with external threads.
[0026] In this embodiment, a damping block 22 is provided at the bottom of the stepped surface 21 at the outward end of the mounting cavity 2, and an end cap 23 is threaded to the side wall of the stepped surface 21. The end cap 23 has a through hole 231 in the middle, and the through hole 241 in the middle of the internal damping block 24 has a flared end structure. The protruding ring 413 on the tool mounting end 41 has its inward side contacting the damping block 22, and its outward conical surface contacting the damping block 24. This multi-layered damping structure effectively reduces vibration transmission.
[0027] In this embodiment, the cutting fluid nozzle 7 has a spherical structure, consisting of a sphere 71 and a central outlet hole 72. The outlet hole 72 is a conical hole with a smaller diameter at the outer end. The mounting cavity 6 is a spherical cavity, which allows the cutting fluid to be sprayed more concentratedly and evenly. The sealing ring 61 on the inner wall of the outer end of the mounting cavity 6 prevents the cutting fluid from leaking.
[0028] In this embodiment, one end of the roller 62 at the top of the spherical cavity is connected to the output end of drive motor 63, and the bottom of the turntable 64 is connected to the output end of drive motor 65. Both the roller 62 and the turntable 64 are in contact with the outer surface of the sphere 71. The angle of the cutting fluid nozzle 7 can be adjusted by drive motor 63 and drive motor 65, so that the cutting fluid can better cover the contact area between the cutting tool and the workpiece. The upper surface of the turntable 64 has an arc-shaped concave structure, which can better support the sphere 71. The anti-slip texture on the upper surfaces of the roller 62 and the turntable 64 can increase the friction with the sphere 71 and ensure stability when adjusting the angle.
[0029] The working principle and beneficial effects of the above technical solution are as follows:
[0030] Tool installation process: Align the mounting end 41 of the tool 4 with the mounting hole 3 at the bottom of the mounting cavity 2, insert the insertion rod 411 into the through hole 33, and ensure the tapered contact surface 412 fits tightly with the outward end of the through hole 33. At this time, the damping ring 5 contacts the outer wall of the tool mounting end 41, providing initial shock absorption. Next, thread the end cap 23 onto the stepped surface 21, so that the damping block 22 and the damping block 24 make tight contact with the two sides of the convex ring 413, further enhancing the shock absorption effect.
[0031] Cutting fluid supply and nozzle adjustment process: Connect the inlet pipe 10 to the connection hole 8, turn on the cutting fluid supply device, and the cutting fluid enters the second mounting cavity 6 through the liquid channel 9, and then sprays out from the outlet hole 72 of the cutting fluid nozzle 7. When it is necessary to adjust the spray angle of the cutting fluid, start the first drive motor 63 and the second drive motor 65 respectively. The first drive motor 63 drives the drum 62 to rotate, and the second drive motor 65 drives the turntable 64 to rotate. Since the drum 62 and the turntable 64 are in contact with the outer surface of the ball 71 and have anti-slip texture, the ball 71 rotates accordingly, thereby realizing the adjustment of the angle of the cutting fluid nozzle 7, so that the cutting fluid can be accurately sprayed onto the contact area between the tool and the workpiece.
[0032] The above are merely preferred embodiments of this utility model; however, the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and its improved concept, should be included within the scope of protection of this utility model.
Claims
1. A vibration-damping tool mounting base for a CNC machine tool, characterized in that: The device includes a housing (1), a tool mounting cavity 1 (2) in the middle of the housing (1), a mounting hole (3) at the bottom of the mounting cavity 1 (2), the mounting hole (3) being detachably connected to the mounting end (41) of the tool (4), the cutting head of the tool (4) extending out of the mounting cavity 1 (2), a plurality of shock-absorbing rings (5) being provided in the mounting cavity 1 (2), the shock-absorbing rings (5) being in contact with the outer wall of the mounting end (41) of the tool (4), a plurality of mounting cavities 2 (6) being symmetrically provided at the front end of the housing (1) with the mounting cavity 1 (2) as the center, a cutting fluid nozzle (7) being provided in the mounting cavity 2 (6), a connecting hole (8) being provided on the side wall of the housing (1), a liquid channel (9) being provided between the connecting hole (8) and the mounting cavity 2 (6), a liquid inlet pipe (10) being detachably provided at the connecting hole (8), and the liquid inlet pipe (10) being connected to a cutting fluid supply device. The outer end of the insertion hole (3) is provided with a stepped surface (31), and a damping block (32) is provided inside the stepped surface (31). A through hole (33) is provided through the middle of the damping block (32). The outer end of the through hole (33) is a flared structure. The middle of the inner end of the mounting end (41) is provided with a rod (411). The connection between the rod (411) and the mounting end (41) is provided with a conical contact surface (412). The conical contact surface (412) matches the outer end of the through hole (33). The mounting cavity 1 (2) has a stepped surface 2 (21) facing outward. The bottom of the stepped surface 2 (21) has a damping block 2 (22). The side wall of the stepped surface 2 (21) is threaded with an end cap (23). The end cap (23) has a through hole 2 (231) in the middle. The end cap (23) has a damping block 3 (24) inside. The damping block 3 (24) has a through hole 3 (241) in the middle. The through hole 3 (241) has a flared end facing inward. The mounting end (41) has a convex ring (413). The convex ring (413) faces inward and contacts the damping block 2 (22). The convex ring (413) faces outward and has a conical structure and contacts the damping block 3 (24).
2. The anti-vibration tool mounting base for a CNC machine tool according to claim 1, characterized in that: The cutting fluid nozzle (7) is a spherical structure, including a sphere (71). A liquid outlet hole (72) is provided in the middle of the sphere (71). The liquid outlet hole (72) is a conical hole, with the outward end being the end with a small diameter. The mounting cavity two (6) is a spherical cavity.
3. The anti-vibration tool mounting base for a CNC machine tool according to claim 2, characterized in that: A sealing ring (61) is provided on the inner wall of the outer end of the mounting cavity 2 (6).
4. The anti-vibration tool mounting base for a CNC machine tool according to claim 2, characterized in that: A roller (62) is horizontally arranged at the top of the spherical cavity. One end of the roller (62) is connected to the output end of the first drive motor (63). A turntable (64) is arranged at the bottom of the spherical cavity. The bottom of the turntable (64) is connected to the output end of the second drive motor (65). Both the roller (62) and the turntable (64) are in contact with the outer surface of the sphere (71).
5. A vibration-damping tool mounting base for a CNC machine tool according to claim 4, characterized in that: The upper surface of the turntable (64) has an arc-shaped concave structure.
6. The anti-vibration tool mounting base for a CNC machine tool according to claim 4, characterized in that: The upper surfaces of the roller (62) and turntable (64) are provided with anti-slip textures.