Numerical control lathe tool clamping device

Abstract

The utility model discloses a numerical control lathe tool clamping device which comprises a base, an adjusting seat rotationally arranged on the base, a rod body fixedly connected to the base and penetrating through the adjusting seat, a locking nut rotationally connected to the upper end of the rod body in a threaded mode and provided with a handle rod, and a tool apron used for clamping a tool. At least one dovetail groove is formed in the side wall of the adjusting base, and the number of the tool aprons is the same as that of the dovetail grooves. A dovetail block in sliding fit with the dovetail groove is arranged on the tool apron; a vertical groove is formed in the surface of the dovetail groove, an eccentric shaft is rotationally arranged in the groove, the upper end of the eccentric shaft extends out of the upper end face of the adjusting seat, and the end of the eccentric shaft is fixedly connected with a trigger; and when the trigger handle is rotated forwards and backwards, the eccentric shaft and the dovetail block are switched between contact and separation. The device has the advantages that different machining requirements can be met without frequently replacing cutters or adjusting the height of a machine tool workbench, and the machining efficiency and the production flexibility are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment technology, and in particular to a tool clamping device for CNC lathes. Background Technology

[0002] CNC lathes belong to the field of precision machining equipment. These machine tools are typically equipped with multi-station turret structures or power turret modules with drive functions, thus enabling them to adapt to various machining processes. They can be used for efficient cutting of straight cylindrical surfaces, inclined cylindrical surfaces, arc surfaces, and various complex contour workpieces such as threads, grooves, and worm gears. The control system supports linear interpolation and circular interpolation functions and integrates multiple compensation mechanisms to improve machining accuracy and stability. In applications involving the mass production of parts with complex geometries, this machine tool demonstrates excellent machining consistency and economic practicality.

[0003] Existing CNC lathe tool holders typically have a fixed tool height during operation. This fixed height is particularly inconvenient when dealing with complex and varied machining tasks, especially when frequent adjustments to the tool's position relative to the workpiece are needed to adapt to different machining depths or surface finishes. For example, when machining cylindrical surfaces with different diameters or performing multi-layer cutting operations, operators often need to indirectly adjust the machining position by adjusting the entire machine tool's table height or changing to different tool specifications. This not only increases preparation time and reduces production efficiency but may also affect machining accuracy and consistency. Therefore, the industry urgently needs a new tool holder that allows for convenient tool height adjustment to improve the flexibility, adaptability, and machining efficiency of CNC lathes. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a tool clamping device for CNC lathes.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A CNC lathe tool clamping device includes a base, an adjusting seat rotatably mounted on the base, a rod fixedly connected to the base and passing through the adjusting seat, a locking nut threadedly connected to the upper end of the rod and having a handle, and a tool holder for clamping the tool. The adjusting seat has at least one dovetail groove on its side wall, and the number of tool holders is the same as the number of dovetail grooves. A dovetail block is provided on the tool holder and slides with the dovetail groove. A vertical groove is provided on the surface of the dovetail groove, and an eccentric shaft is rotatably mounted within the groove. The upper end of the eccentric shaft extends out of the upper surface of the adjusting seat, and a handle is fixedly connected to this end of the eccentric shaft. When the handle is rotated in both directions, the eccentric shaft and the dovetail block switch between contact and separation.

[0007] Preferably, the tool holder has a mounting groove for holding the tool and a locking screw for locking the tool.

[0008] Preferably, the eccentric shaft includes an eccentric section and pivots disposed at both ends of the eccentric section, wherein the pivots are rotatably connected to the corresponding ends of the grooves.

[0009] Preferably, a cylindrical protrusion is provided at the center of the upper end of the base, and a cylindrical hole is provided on the adjusting seat to cooperate with the cylindrical protrusion.

[0010] Preferably, the lower end of the adjusting seat is provided with at least one blind hole, and a spring and a ball are arranged in sequence from top to bottom in the blind hole. The upper end of the base is provided with positioning holes that cooperate with the ball, and the number of positioning holes is the same as the number of blind holes.

[0011] Preferably, there are four dovetail grooves, evenly distributed on the four sides of the adjusting seat.

[0012] The above technical solution has the following advantages:

[0013] This invention provides a CNC lathe tool clamping device with height adjustable function, effectively solving the processing limitations caused by the fixed tool holder height in the prior art, thus bringing several significant technical advantages: by realizing rapid and precise adjustment of tool height, it can adapt to different processing needs without frequent tool changes or machine tool table height adjustments, significantly improving processing efficiency and production flexibility; at the same time, this structure helps to improve processing accuracy and batch consistency, ensuring workpiece surface quality and dimensional stability; in addition, its adjustment capability expands the adaptability of CNC lathes to various complex shapes and multi-specification workpieces, enhancing the equipment's versatility and practicality; the easy-to-operate height adjustment mechanism also reduces the degree of manual intervention and operational difficulty, further improving ease of use. Attached Figure Description

[0014] Figure 1 This is a front view of one embodiment of the present utility model;

[0015] Figure 2 for Figure 1 The left view;

[0016] Figure 3 for Figure 1 Top view;

[0017] Figure 4 for Figure 3 A three-dimensional sectional view of AA;

[0018] Figure 5 for Figure 4 Enlarged view of section B;

[0019] Figure 6 for Figure 3 A three-dimensional sectional view of CC.

[0020] Figure 7 for Figure 6 Enlarged view of section D;

[0021] Figure 8 for Figure 1 A three-dimensional image;

[0022] Figure 9 for Figure 8 A structural diagram showing a tool assembly.

[0023] In the diagram: 1-base, 2-adjusting seat, 3-rod body, 4-handle, 5-locking nut, 6-tool holder, 7-dovetail groove, 8-dovetail block, 9-groove, 10-eccentric shaft, 11-handle, 12-mounting groove, 13-locking screw, 14-eccentric section, 15-pivot, 16-cylindrical protrusion, 17-cylindrical hole, 18-blind hole, 19-spring, 20-ball bearing, 21-positioning hole, 30-tool. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] As shown in the attached figure, a CNC lathe tool clamping device includes a base 1, an adjusting seat 2 rotatably mounted on the base 1, a rod 3 fixedly connected to the base 1 and passing through the adjusting seat 2, a locking nut 5 threadedly connected to the upper end of the rod 3 and having a handle 4, and a tool holder 6 for clamping a tool 30; four dovetail grooves 7 are provided on the side wall of the adjusting seat 2, and the four dovetail grooves 7 are distributed on the four sides of the adjusting seat 2, and the number of tool holders 6 is the same as the number of dovetail grooves 7; a dovetail block 8 is provided on the tool holder 6 and slides with the dovetail groove 7; a vertical groove 9 is provided on the surface of the dovetail groove 7, and an eccentric shaft 10 is rotatably mounted in the groove 9, the upper end of the eccentric shaft 10 extends out of the upper end surface of the adjusting seat 2, and a handle 11 is fixedly connected to this end of the eccentric shaft 10; when the handle 11 is rotated in both directions, the eccentric shaft 10 and the dovetail block 8 switch between contact and separation.

[0026] As a specific technical solution in this embodiment, the tool holder 6 has a mounting groove 12 for holding the tool 30 and a locking screw 13 for locking the tool 30. In use, the tool 30 to be used is placed in the mounting groove 12 in advance and locked by the locking screw 13. Obviously, other commonly used tool holders can also be used to install the tool 30.

[0027] As a preferred embodiment, the eccentric shaft 10 includes an eccentric section 14 and pivots 15 disposed at both ends of the eccentric section 14. The pivots 15 are rotatably connected to the corresponding ends of the groove 9. When the eccentric shaft 10 is rotated, the non-cylindrical surface of the eccentric section 14 contacts and tightly engages with the dovetail block 8, thereby locking the tool holder 6. When the eccentric shaft 10 is rotated in the opposite direction, the non-cylindrical surface of the eccentric section 14 separates from the dovetail block 8, allowing for rapid adjustment of the height of the tool holder 6 and rapid replacement of the tool holder 6. To ensure a sufficient adjustment range, the length of the eccentric section 14 should be close to the length of the groove 9.

[0028] As a preferred technical solution in this embodiment, a cylindrical protrusion 16 is provided at the center of the upper end of the base 1, and a cylindrical hole 17 is provided on the adjusting seat 2 to cooperate with the cylindrical protrusion 16. By providing the cylindrical hole 17 to cooperate with the cylindrical protrusion 16, the coaxiality of the adjustment seat 2 can be ensured during rotation adjustment. Obviously, other methods can also be used for connection.

[0029] As a preferred embodiment, the lower end of the adjusting seat 2 is provided with four blind holes 18. A spring 19 and a ball bearing 20 are sequentially arranged from top to bottom within each blind hole 18. The upper end of the base 1 is provided with positioning holes 21 that mate with the ball bearing 20. The number of positioning holes 21 is the same as the number of blind holes 18. The diameter of the blind holes should be smaller than the diameter of the ball bearing 20 to satisfy the function of rotational adjustment and positioning. After the adjusting seat 2 is assembled with the base 1, the spring 19 is in a compressed state to ensure that the ball bearing 20 has a certain force. When the locking nut 5 is loosened and the adjusting seat 2 is rotated, the ball bearing 20 will enter the positioning hole 21 to achieve positioning. When the adjusting seat 2 rotates and applies a large rotational force, the ball bearing 20 can disengage from the positioning hole 21.

[0030] In the operation of this CNC lathe tool clamping device, the required tool 30 is first installed in the mounting slot 12 of the tool holder 6 and fixed with locking screws 13. The tool holder 6 achieves flexible height adjustment through the sliding engagement of the dovetail block 8 on it with the dovetail groove 7 on the side wall of the adjusting seat 2. Specifically, each side of the adjusting seat 2 is provided with a dovetail groove 7, and a vertical groove 9 is provided in the groove. An eccentric shaft 10 is installed in the groove. The two ends of the eccentric shaft 10 are pivots 15, and the middle part is an eccentric section 14. The top of the eccentric shaft 10 is connected to a handle 11. By turning the handle 11, the eccentric shaft 10 is rotated, and the non-cylindrical surface of the eccentric section 14 contacts or separates from the dovetail block 8, thereby locking or releasing the tool holder 6. When the eccentric section 14 is tightly engaged with the dovetail block 8, the tool holder 6 is firmly locked; otherwise, the height can be adjusted or the tool holder 6 can be replaced.

[0031] In this invention, the adjusting seat 2 is rotatably mounted on the base 1, and its lower end has four blind holes 18. Springs 19 and ball bearings 20 are sequentially installed in each blind hole. The base 1 has positioning holes 21 that mate with the ball bearings 20. When the locking nut 5 at the upper end of the rod 3 is loosened, the adjusting seat 2 can be rotated to select the desired tool position. At this time, the ball bearings 20 enter the corresponding positioning holes 21 under the action of the springs, thus positioning the adjusting seat 2. When the angle needs to be adjusted, applying a certain external force will disengage the ball bearings 20 from the positioning holes 21, completing the rotational adjustment.

[0032] This utility model achieves height adjustability, rapid tool changing capability, and stable locking function of the tool clamping device through the synergistic effect of the locking nut 5, eccentric locking mechanism, and ball positioning structure, thereby improving the machining efficiency and ease of operation of CNC lathes.

[0033] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A CNC lathe tool clamping device, comprising a base (1), an adjusting seat (2) rotatably disposed on the base (1), a rod (3) fixedly connected to the base (1) and passing through the adjusting seat (2), a locking nut (5) threadedly rotatably connected to the upper end of the rod (3) and having a handle (4), and a tool holder (6) for clamping a tool (30); characterized in that: At least one dovetail groove (7) is provided on the side wall of the adjusting seat (2), and the number of the tool holders (6) is the same as the number of dovetail grooves (7); a dovetail block (8) is provided on the tool holder (6) and slides with the dovetail groove (7); a vertical groove (9) is provided on the surface of the dovetail groove (7), and an eccentric shaft (10) is rotatably arranged in the groove (9). The upper end of the eccentric shaft (10) extends out of the upper end face of the adjusting seat (2), and a handle (11) is fixedly connected to this end of the eccentric shaft (10); when the handle (11) is rotated in both directions, the eccentric shaft (10) and the dovetail block (8) switch between contact and separation.

2. The CNC lathe tool clamping device according to claim 1, characterized in that: The tool holder (6) has a mounting groove (12) for holding the tool (30) and a locking screw (13) for locking the tool (30).

3. The CNC lathe tool clamping device according to claim 1 or 2, characterized in that: The eccentric shaft (10) includes an eccentric section (14) and a pivot (15) disposed at both ends of the eccentric section (14), wherein the pivot (15) is rotatably connected to the corresponding end of the groove (9).

4. The CNC lathe tool clamping device according to claim 1 or 2, characterized in that: A cylindrical protrusion (16) is provided at the center of the upper end of the base (1), and a cylindrical hole (17) is provided on the adjusting seat (2) to cooperate with the cylindrical protrusion (16).

5. The CNC lathe tool clamping device according to claim 3, characterized in that: A cylindrical protrusion (16) is provided at the center of the upper end of the base (1), and a cylindrical hole (17) is provided on the adjusting seat (2) to cooperate with the cylindrical protrusion (16).

6. The CNC lathe tool clamping device according to claim 1 or 2, characterized in that: The lower end of the adjusting seat (2) is provided with at least one blind hole (18). A spring (19) and a ball (20) are arranged in the blind hole (18) from top to bottom. The upper end of the base (1) is provided with a positioning hole (21) that cooperates with the ball (20). The number of positioning holes (21) is the same as that of the blind hole (18).

7. The CNC lathe tool clamping device according to claim 3, characterized in that: The lower end of the adjusting seat (2) is provided with at least one blind hole (18). A spring (19) and a ball (20) are arranged in the blind hole (18) from top to bottom. The upper end of the base (1) is provided with a positioning hole (21) that cooperates with the ball (20). The number of positioning holes (21) is the same as that of the blind hole (18).

8. The CNC lathe tool clamping device according to claim 4, characterized in that: The lower end of the adjusting seat (2) is provided with at least one blind hole (18). A spring (19) and a ball (20) are arranged in the blind hole (18) from top to bottom. The upper end of the base (1) is provided with a positioning hole (21) that cooperates with the ball (20). The number of positioning holes (21) is the same as that of the blind hole (18).

9. The CNC lathe tool clamping device according to claim 1 or 2, characterized in that: There are four dovetail grooves (7), which are evenly distributed on the four sides of the adjusting seat (2).

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