Hardware machining numerical control lathe clamp convenient to install

Abstract

The utility model discloses a hardware machining numerical control lathe clamp convenient to install, and relates to the technical field of numerical control lathe clamps, the hardware machining numerical control lathe clamp comprises a fixed disc and a movable disc, the fixed disc is installed on a machine tool spindle, and the fixed disc and the movable disc are located on the same axis; a rotating ring is rotatably connected to the interior of the fixed disc, four outer gears which are annularly distributed at equal intervals are evenly distributed in the fixed disc in the circumferential direction, and rotating rods which are distributed perpendicular to the plane of the fixed disc are fixedly connected to the ends of the outer gears. According to the hardware machining numerical control lathe clamp convenient to install, synchronous radial movement of the four sets of clamping rods is achieved through a worm and gear transmission system of the worm and the rotating ring, a four-point centering clamping mode of the clamp can adapt to contour features of irregular workpieces, it is guaranteed that clamping force is evenly transmitted through equal-angle distribution of contact points, and the clamping force is uniform. And in cooperation with an axial adjusting mechanism driven by a screw rod, radial clamping and axial positioning can be synchronously completed in single-time clamping, and the alignment time of the non-standard workpiece is remarkably shortened.

Description

Technical Field

[0001] This utility model relates to the field of CNC lathe fixture technology, specifically a hardware processing CNC lathe fixture that is easy to install. Background Technology

[0002] A CNC lathe fixture is a special device used to fix a workpiece and ensure that the workpiece is positioned accurately and stably during CNC lathe machining, preventing the workpiece from shifting or vibrating during machining, thereby ensuring machining accuracy and quality.

[0003] To achieve the above functions, the prior art (publication number: CN211413690U) of Chinese Patent discloses a CNC lathe fixture, which relates to the field of lathe fixture device technology. It solves the problem that the granular iron filings that fall into the chuck area during the rotational cutting of the workpiece by the CNC chuck are not easy to be discharged. The fixture includes a chuck body; the chuck body is equipped with a chuck key and a chuck lock, and a flange seat is installed on the left side of the chuck body. A circular hole with a movable hole structure is opened at the center of the chuck body for threading an externally threaded cylindrical functional column. This functional column, inside the chuck, can periodically push out the iron filings that fall into the movable hole after the workpiece is cut by the chuck. This makes it easier to clean the iron filings in the movable hole, which are difficult to clean, during routine machine tool maintenance. In addition, the magnetic attraction function of the front end of this column forms an attraction and discharge when cleaning iron filings, making the functional structure more reasonable.

[0004] While existing technologies can overcome the shortcomings mentioned above, other problems still exist in their operation: although traditional cylindrical clamps can meet the clamping requirements of conventional workpieces, their clamping mechanisms mostly adopt unidirectional or bidirectional synchronous clamping designs. When facing irregular workpieces or workpieces with poor rotational symmetry, it is difficult to achieve multi-point uniform force, which can easily lead to workpiece displacement or insufficient clamping contact area. At the same time, existing clamping systems generally lack axial compensation capabilities, and when dealing with workpiece length tolerances, the clamping position needs to be repeatedly adjusted, resulting in low clamping efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a hardware processing CNC lathe fixture that is easy to install, in order to solve the problems in the background art where it is difficult to achieve multi-point uniform force when facing irregular or poorly rotated workpieces, which easily leads to workpiece displacement or insufficient clamping contact area. At the same time, existing clamping systems generally lack axial compensation capability, and when dealing with workpiece length tolerances, the fixture position needs to be repeatedly adjusted, resulting in low clamping efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a CNC lathe fixture for easy installation of hardware processing, comprising a fixed plate and a moving plate, wherein the fixed plate is installed on the machine tool spindle, and the fixed plate and the moving plate are located on the same axis;

[0007] The fixed disk is rotatably connected to a rotating ring inside. The fixed disk has four annularly distributed external gears evenly distributed around its circumference. The ends of the external gears are fixedly connected to rotating rods that are perpendicular to the plane of the fixed disk. The end of the rotating rod away from the external gears is fixedly connected to a clamping rod. The inner side of the rotating ring is provided with equally distributed internal gear teeth, and the rotating ring meshes with the external gears through the internal gear teeth.

[0008] Preferably, the outer side of the rotating ring is provided with a worm gear structure, which is composed of equidistantly distributed worm-shaped outer gear teeth. The fixed disk is rotatably connected to a worm through a bearing, and the worm is arranged along the tangential direction of the rotating ring and meshes with the outer gear teeth.

[0009] Preferably, a rotating rod is fixedly connected to both ends of the worm gear, and a through hole is provided on one side of the fixed disk, with the rotating rod rotatably connected inside the through hole.

[0010] Preferably, a screw is rotatably connected to the center of the fixed disk via a thrust bearing, and a central positioning rod with internal threads is fixedly connected to the center of the moving disk, with the screw and the central positioning rod being threadedly connected.

[0011] Preferably, the side of the moving disc away from the fixed disc is fixedly connected with an annularly distributed workpiece support pad, and the pad is evenly distributed circumferentially outside the central positioning rod.

[0012] Preferably, the moving disc has annularly distributed positioning holes inside, and the fixed disc is fixedly connected to a positioning sleeve coaxially arranged with the positioning holes on the side near the moving disc, and the positioning sleeve is slidably connected inside the positioning holes, and the rotating rod is axially slidably connected inside the positioning sleeve.

[0013] Preferably, the fixed plate is fixedly connected to a ring of equally spaced mounting rods on the side away from the moving plate, and the fixed plate is mounted on the machine tool spindle via the mounting rods. The outer side of the fixed plate is provided with circumferentially distributed counterweight grooves.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This easy-to-install CNC lathe fixture for hardware processing achieves synchronous radial movement of four sets of clamping rods through a worm gear and rotating ring worm wheel transmission system. Its four-point centering clamping mode can adapt to the contour features of irregular workpieces. The uniform distribution of contact points ensures uniform transmission of clamping force. With the screw-driven axial adjustment mechanism, radial clamping and axial positioning can be completed simultaneously in a single clamping, significantly shortening the alignment time of non-standard workpieces.

[0016] The axial adjustment mechanism, through the threaded pair of the screw and the center positioning rod, combined with the axial bearing characteristics of the thrust bearing, enables the moving plate to independently complete the axial displacement adjustment. This adjustment system forms an orthogonal motion relationship with the radial clamping mechanism. It can achieve the setting of the reference surface through the axial positioning of the workpiece support pad, and can also perform length tolerance compensation according to the actual size of the workpiece, thus expanding the adaptability of the fixture to workpieces of different specifications. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the fixed disk of this utility model;

[0020] Figure 4 This is a schematic diagram of the worm gear structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the gear structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the screw structure of this utility model.

[0023] In the diagram: 1. Fixed disc; 2. Moving disc; 3. Rotating ring; 4. Outer gear tooth; 5. Worm gear; 6. Rotating rod; 7. Inner gear tooth; 8. Gear; 9. Rotating rod; 10. Clamping rod; 11. Screw; 12. Center positioning rod; 13. Pad; 14. Positioning hole; 15. Positioning sleeve; 16. Mounting rod; 17. Counterweight groove. Detailed Implementation

[0024] 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.

[0025] Example 1: Please refer to Figure 1 - Figure 6This utility model provides the following technical solution: A CNC lathe fixture for easy installation of hardware processing includes a fixed plate 1 and a moving plate 2. The fixed plate 1 is installed on the machine tool spindle, and the fixed plate 1 and the moving plate 2 are located on the same axis. A rotating ring 3 is rotatably connected inside the fixed plate 1. Four annularly distributed external gears 8 are evenly distributed around the inside of the fixed plate 1. A rotating rod 9, which is perpendicular to the plane of the fixed plate 1, is fixedly connected to the end of the external gear 8. A clamping rod 10 is fixedly connected to the end of the rotating rod 9 away from the external gear 8. An internal gear tooth 7 is evenly distributed on the inner side of the rotating ring 3, and the rotating ring 3 meshes with the external gear 8 through the internal gear tooth 7. A worm gear structure is provided on the outer side of the rotating ring 3. The worm gear structure is composed of worm-shaped external gear teeth 4 evenly distributed. A worm 5 is rotatably connected inside the fixed plate 1 through a bearing. The worm 5 is arranged along the tangent direction of the rotating ring 3 and meshes with the external gear teeth 4. A rotating rod 6 is fixedly connected to both ends of the worm 5. A through hole is provided on the side, and the rotating rod 6 is rotatably connected inside the through hole; a screw 11 is rotatably connected to the center of the fixed disk 1 through a thrust bearing; a central positioning rod 12 with internal threads is fixedly connected to the center of the moving disk 2, and the screw 11 is threadedly connected to the internal threads of the central positioning rod 12; a ring-shaped workpiece support pad 13 is fixedly connected to the side of the moving disk 2 away from the fixed disk 1, and the pad 13 is evenly distributed around the outside of the central positioning rod 12; a ring-shaped positioning hole 14 is provided inside the moving disk 2; a positioning sleeve 15 coaxially arranged with the positioning hole 14 is fixedly connected to the side of the fixed disk 1 near the moving disk 2, and the positioning sleeve 15 is slidably connected inside the positioning hole 14; the rotating rod 9 is axially slidably connected to the inside of the positioning sleeve 15; a ring-shaped mounting rod 16 is fixedly connected to the side of the fixed disk 1 away from the moving disk 2, and the fixed disk 1 is mounted on the machine tool spindle through the mounting rod 16; a counterweight groove 17 is evenly distributed around the outside of the fixed disk 1.

[0026] When a workpiece needs to be clamped, the operator first inputs driving force through the rotating rods 6 at both ends of the worm 5. Since the axis of the worm 5 is arranged along the tangent of the rotating ring 3, the worm 5 and the worm-shaped outer gear teeth 4 on the outer side of the rotating ring 3 form an orthogonal meshing transmission. The unique self-locking characteristic of the worm gear mechanism can prevent the rotating ring 3 from driving the worm 5 in the opposite direction, thereby ensuring the stable output of the clamping force during the clamping process. This transmission system converts the rotational motion input by the operator into the circular motion of the rotating ring 3, providing a power basis for the subsequent multi-directional linkage mechanism.

[0027] The inner gear teeth 7 on the inner side of the rotating ring 3 mesh with four circumferentially distributed external gears 8 to form a transmission. Through the continuous meshing of the inner gear teeth 7, the four external gears 8 rotate synchronously at equal angles. The rotational motion of each external gear 8 is transmitted to the clamping rod 10 through the rotating rod 9 fixed at its end. The axial sliding fit design between the positioning sleeve 15 and the rotating rod 9 ensures the guiding accuracy of the clamping rod 10 during radial movement and allows the moving disk 2 to be adjusted for axial displacement. During the synchronous rotation of the four sets of clamping rods 10, the angle is first adjusted to avoid the workpiece installation path. After the workpiece is placed outside the center positioning rod 12, the clamping rods 10 form a four-point centering clamp during radial movement, which, together with the workpiece support pad 13, forms a two-way clamping structure.

[0028] To achieve axial positioning and tolerance compensation of the workpiece, the operator can rotate the screw 11 connected to the thrust bearing. Since the thrust bearing allows the screw 11 to remain stationary when the machine tool spindle rotates, the screw 11 and the internal thread of the center positioning rod 12 form a threaded transmission pair, driving the moving disk 2 to produce precise displacement along the axial direction. This axial adjustment mechanism and the radial clamping system form an orthogonal motion relationship, so that the workpiece support pad 13 can not only set the axial positioning reference surface, but also perform position compensation according to the actual length of the workpiece. The sliding fit design of the positioning hole 14 and the positioning sleeve 15 maintains the coaxiality of the fixed disk 1 and the moving disk 2 during the axial movement of the moving disk 2, ensuring the motion accuracy of the system.

[0029] Mounting rod 16 securely mounts the fixed plate 1 to the machine tool spindle. The weight of the annular balancing fixed plate 1 in the counterweight groove 17 compensates for the uneven mass distribution of the fixed plate 1 caused by rotating rod 6 and worm gear 5. This balancing system significantly reduces vibration caused by mass eccentricity during high-speed rotation, ensuring machining accuracy. The entire fixture system achieves four-way synchronous clamping through single-point input of worm gear 5. Combined with the axial adjustment mechanism, it forms a system with bidirectional positioning and tolerance compensation functions.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A hardware processing CNC lathe fixture that is easy to install, comprising a fixed plate (1) and a moving plate (2), wherein the fixed plate (1) is mounted on the machine tool spindle and the fixed plate (1) and the moving plate (2) are located on the same axis; Its features are: The fixed disk (1) is rotatably connected to a rotating ring (3). The fixed disk (1) has four annularly distributed external gears (8) evenly distributed around its circumference. The ends of the external gears (8) are fixedly connected to rotating rods (9) that are perpendicular to the plane of the fixed disk (1). The end of the rotating rod (9) away from the external gears (8) is fixedly connected to a clamping rod (10). The inner side of the rotating ring (3) is provided with equally distributed inner gear teeth (7), and the rotating ring (3) meshes with the external gears (8) through the inner gear teeth (7).

2. The easy-to-install CNC lathe fixture for hardware processing according to claim 1, characterized in that: The rotating ring (3) is provided with a worm gear structure on the outside. The worm gear structure is composed of equidistant worm-shaped outer gear teeth (4). The fixed disk (1) is rotatably connected to a worm (5) through a bearing. The worm (5) is arranged along the tangential direction of the rotating ring (3) and meshes with the outer gear teeth (4).

3. The easy-to-install CNC lathe fixture for hardware processing according to claim 2, characterized in that: Both ends of the worm (5) are fixedly connected to rotating rods (6), and a through hole is provided on one side of the fixed disk (1), and the rotating rods (6) are rotatably connected inside the through hole.

4. The easy-to-install CNC lathe fixture for hardware processing according to claim 1, characterized in that: The fixed disk (1) is rotatably connected to a screw (11) via a thrust bearing, and the moving disk (2) is fixedly connected to a center positioning rod (12) with internal threads, and the screw (11) is threadedly connected to the center positioning rod (12).

5. A CNC lathe fixture for easy installation of hardware processing according to claim 4, characterized in that: The moving disc (2) is fixedly connected to a ring of equally spaced workpiece support pads (13) on the side away from the fixed disc (1), and the pads (13) are evenly distributed around the outside of the central positioning rod (12).

6. A CNC lathe fixture for easy installation of hardware processing according to claim 5, characterized in that: The moving disc (2) has a ring of equally spaced positioning holes (14) inside. The fixed disc (1) is fixedly connected to a positioning sleeve (15) coaxially arranged with the positioning holes (14) on the side close to the moving disc (2). The positioning sleeve (15) is slidably connected inside the positioning holes (14). The rotating rod (9) is axially slidably connected inside the positioning sleeve (15).

7. A CNC lathe fixture for easy installation of hardware processing according to claim 6, characterized in that: The fixed disk (1) is fixedly connected to a ring of equally spaced mounting rods (16) on the side away from the moving disk (2), and the fixed disk (1) is mounted on the machine tool spindle through the mounting rods (16). The fixed disk (1) is provided with circumferentially distributed counterweight grooves (17) on its outer side.

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