Cutter clamping mechanism of numerical control machine tool
By introducing a combination design of connecting post, tapered fixing head, groove, column groove, locking post, connecting ring and inclined baffle in the tool clamping mechanism, the wear problem caused by chip splashing during high-speed rotation is solved, and higher clamping stability and protection effect are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANCHANG NARUIKANG PRECISION MASCH CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-19
AI Technical Summary
Existing tool clamping mechanisms suffer from wear due to debris splashing onto the clamping mechanism during high-speed rotation, and there is a lack of effective protective measures.
A structure including a connecting column, a conical fixing head, a groove, a column groove, a locking column, a connecting ring, and an inclined baffle is designed to shield debris from splashing during high-speed rotation and reduce wear.
It effectively prevents waste chips from splashing onto the clamping mechanism, reduces wear on the connection between the tool and the elastic clamping element, and improves clamping stability and protection.
Smart Images
Figure CN224254757U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of CNC machine tool technology, specifically a CNC machine tool clamping mechanism. Background Technology
[0002] CNC machine tool cutting tools are special tools used in CNC machining systems to perform precision machining on workpieces such as cutting, drilling, milling, and turning. They typically consist of a tool holder (such as HSK, BT, or other standard interfaces) and replaceable cutting tips (such as carbide, ceramic, or CBN inserts), and feature high rigidity, high precision (μm level), and programmable automation characteristics.
[0003] Existing tool clamping mechanisms, after clamping and fixing the tool, lack protective parts at the tool clamping point. This makes it easy for waste chips generated during tool machining to splash onto the connection between the tool and the clamping mechanism. Since the tool is rotating at high speed, both the tool and the clamping mechanism suffer some wear. Utility Model Content
[0004] The purpose of this utility model is to provide a CNC machine tool tool clamping mechanism. This utility model uses components such as a connecting column, a tapered fixing head, a groove, a column groove, a locking column, a connecting ring, and an inclined baffle to work together. This allows the connecting column to shield the connection point with the elastic clamping element from flying debris when the tool is rotating at high speed, thus protecting it and reducing wear on the connection point between the tool and the elastic clamping element. This solves the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A CNC machine tool tool clamping mechanism includes a connecting column, a V-groove, a tapered fixing head, an elastic clamping element, and a tool body. The tapered fixing head is installed on the top of the connecting column, and a V-groove is provided between the connecting column and the tapered fixing head.
[0007] The top of the conical fixing head is provided with a groove, and the center of the groove is provided with a mounting hole for placing the tool body. Four sets of elastic clamping members for clamping and fixing the tool body are evenly distributed inside the mounting hole.
[0008] The groove has six sets of column grooves evenly distributed on its inner surface. Each column groove has a locking pin, and a connecting ring is fixedly connected to the top of the locking pin. The connecting ring fits against the top of the conical fixing head, and several sets of inclined baffles are installed on the top of the connecting ring near the inner end of the tool body.
[0009] Preferably, the V-groove has a groove on its front side for pressing with the thumb.
[0010] Preferably, the conical fixing head has a spiral groove on the lower front side for tightening and loosening the elastic clamping member.
[0011] Preferably, a connecting groove is provided at the center of the bottom of the connecting column, and three sets of slots are evenly distributed at the outer end of the connecting groove.
[0012] Preferably, a protruding post is fixedly connected to the inner top of the connecting groove, and three sets of positioning grooves are evenly distributed on the inner wall of the connecting groove.
[0013] Preferably, the tapered fixing head has anti-slip texture on its upper part.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] This utility model uses a combination of components such as a connecting post, a tapered fixing head, a groove, a post groove, a locking post, a connecting ring, and an inclined baffle to facilitate the connection between the tool connecting post and the elastic clamping element during high-speed rotation, thereby protecting the tool from flying debris and reducing wear on the connection between the tool and the elastic clamping element. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the overall structure and the inclined baffle of this utility model.
[0018] Figure 3 for Figure 2 Top view of the structure;
[0019] Figure 4 for Figure 2 A schematic diagram of the structure viewed from below.
[0020] In the diagram: 1. Connecting post; 101. Slot; 102. Positioning slot; 103. Protruding post; 2. V-groove; 201. Groove opening; 3. Conical fixing head; 301. Spiral groove; 4. Anti-slip texture; 5. Groove; 6. Elastic clamping element; 7. Tool body; 8. Post groove; 801. Slot; 9. Connecting ring; 10. Inclined baffle. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Please see Figures 1-4 This utility model provides a technical solution:
[0023] A CNC machine tool tool clamping mechanism includes a connecting column 1, a V-groove 2, a conical fixing head 3, an elastic clamping member 6, and a tool body 7. The top of the connecting column 1 is equipped with the conical fixing head 3, and a V-groove 2 is provided between the connecting column 1 and the conical fixing head 3.
[0024] The top of the conical fixing head 3 has a groove 5, and the center of the groove 5 has a mounting hole for the tool body 7 to be placed. Four sets of elastic clamping members 6 for clamping and fixing the tool body 7 are evenly distributed inside the mounting hole. The lower front of the conical fixing head 3 has a spiral groove 301 for tightening and loosening the elastic clamping members 6.
[0025] The geometric design of the V-groove 2 enables the spinning tool holder to produce uniform radial contraction under axial pressure (such as tightening a nut), ensuring that the tool body 7 is wrapped with high precision (runout ≤ 0.003 mm).
[0026] The spinning tool holder is constructed by combining components such as connecting post 1, V-groove 2, conical fixing head 3, spiral groove 301 and elastic clamping element 6, thereby improving the stability of the tool body 7 in clamping and fixing.
[0027] The model of the spun tool holder is HSK-A63. The working principle of the spun tool holder mounting body 7 is to generate radial clamping force through elastic deformation.
[0028] When the tool body 7 is inserted into the mounting hole on the tapered fixed head 3, the spiral groove 301 structure on the outside of the tapered fixed head 3 is rotated by the operating tool to generate centrifugal force, causing the inner wall of the tapered fixed head 3 to deform elastically in a uniform manner, thereby forming a uniform radial pressure on the inside of the tapered fixed head 3; at the same time, the internal elastic clamping member 6 structure provides adaptive clamping force through a precisely designed deformation amount, which can ensure high rigidity clamping (usually the clamping accuracy can reach within 0.003mm) and absorb cutting vibration through elastic deformation.
[0029] This design enhances the clamping force through centrifugal force when rotating at high speeds (up to 50,000 rpm), while built-in micro sensors monitor the clamping status in real time, forming a closed-loop control to achieve dynamic balanced clamping.
[0030] Among them, six sets of column grooves 8 are evenly distributed on the inner surface of the groove 5. A locking post 801 is snapped into the inside of the column groove 8. A connecting ring 9 is fixedly connected to the top of the locking post 801. The connecting ring 9 fits against the top of the conical fixing head 3. Several sets of inclined baffles 10 are installed on the top of the connecting ring 9 near the inner end of the tool body 7.
[0031] This utility model uses a combination of components such as a connecting post 1, a tapered fixing head 3, a groove 5, a column groove 8, a locking post 801, a connecting ring 9, and an inclined baffle 10 to facilitate the connection between the tool connecting post 1 and the elastic clamping member 6 during high-speed rotation, thereby protecting the tool from flying debris and reducing wear on the connection between the tool and the elastic clamping member 6.
[0032] Furthermore, by hand, the connecting ring 9 is picked up and the evenly installed pins 801 at its bottom are inserted into the corresponding slots 8 inside the groove 5, so that the connecting ring 9 is locked in place. At the same time, the connecting ring 9 is in contact with the top of the conical fixing head 3, so that the top of the connecting ring 9 can be fitted with several sets of inclined baffles 10 close to the tool body 7 without contacting the tool body 7; therefore, the set shielding parts will not affect the operation of the tool body 7.
[0033] Conversely, by performing the opposite operation, the connecting ring 9 can be removed from the conical fixing head 3 for replacement.
[0034] The V-groove 2 has a slot 201 on the front for thumb pressing, which makes it easy to pick up the spinning handle.
[0035] A connecting groove is provided at the bottom center of the connecting post 1, and three sets of slots 101 are evenly distributed at the outer end of the connecting groove. A protruding post 103 is fixedly connected to the inner top of the connecting groove, and three sets of positioning slots 102 are evenly distributed on the inner wall of the connecting groove.
[0036] This device uses components such as connecting post 1, connecting groove, slot 101, protruding post 103 and positioning groove 102 to facilitate the positioning and installation of the tool clamping mechanism on the CNC machine tool.
[0037] The tapered fixing head 3 has anti-slip texture 4 on its upper part, which makes it easier to prevent slipping when the spinning knife handle is picked up.
[0038] 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A CNC machine tool tool clamping mechanism, comprising a connecting column (1), a V-groove (2), a tapered fixing head (3), an elastic clamping member (6), and a tool body (7), characterized in that: A conical fixing head (3) is installed on the top of the connecting column (1), and a V-groove (2) is provided between the connecting column (1) and the conical fixing head (3); The top of the conical fixing head (3) is provided with a groove (5), and the center of the groove (5) is provided with a tool body (7) for mounting into the mounting hole. Four sets of elastic clamping members (6) for clamping and fixing the tool body (7) are evenly distributed inside the mounting hole. Among them, six sets of column grooves (8) are evenly distributed on the inner surface of the groove (5). A locking post (801) is snapped into the inside of the column groove (8). A connecting ring (9) is fixedly connected to the top of the locking post (801). The connecting ring (9) fits against the top of the conical fixing head (3). Several sets of inclined baffles (10) are installed on the top of the connecting ring (9) near the inner end of the tool body (7).
2. The CNC machine tool clamping mechanism according to claim 1, characterized in that: The V-groove (2) has a groove (201) on its front side for pressing with the thumb.
3. The CNC machine tool clamping mechanism according to claim 1, characterized in that: The conical fixing head (3) has a spiral groove (301) on the lower front side for tightening and loosening the elastic clamping member (6).
4. The CNC machine tool clamping mechanism according to claim 1, characterized in that: The bottom center of the connecting column (1) is provided with a connecting groove, and three sets of slots (101) are evenly distributed at the outer end of the connecting groove.
5. The CNC machine tool clamping mechanism according to claim 4, characterized in that: The inner top of the connecting groove is fixedly connected with a protruding post (103), and three sets of positioning grooves (102) are evenly distributed on the inner wall of the connecting groove.
6. The CNC machine tool clamping mechanism according to claim 1, characterized in that: The tapered fixing head (3) has anti-slip texture (4) on its upper part.