Rapid clamping tool for sphere machining

Abstract

The utility model provides a fast clamping tool for ball machining, and belongs to the technical field of machining, the fast clamping tool for ball machining comprises a clamp tool, the clamp tool comprises a base module, a linear cutting positioning module, a fast locking mechanism and a size adaptation assembly; an upper pressing plate is arranged on the upper portion of the base module, and a fixing base is arranged at the bottom and used for providing a stable supporting foundation for the whole tool. The linear cutting positioning module is arranged on the base module and used for conducting high-precision radial positioning on the ball. Each quick locking mechanism comprises a linkage locking device composed of two sets of joint bolts and two sets of shaft pins, and the quick locking mechanisms are arranged on the two sides of the base module and used for driving the shaft pins to achieve radial locking of the ball by rotating the joint bolts; the size adaptation assembly is a replaceable positioning bush and used for being matched with balls of different specifications, and the positioning bush is installed in the linear cutting positioning module and used for achieving compatible clamping of the balls of different sizes.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology, and specifically relates to a quick clamping fixture for machining spheres. Background Technology

[0002] In the field of machining technology, spherical parts are key basic components widely used in many industries such as bearings, valves, and medical devices. In the machining processes of spherical parts, such as drilling and turning, the efficiency and accuracy of clamping and positioning directly affect product quality and production efficiency.

[0003] Currently, the industry commonly uses three-jaw chucks with soft jaws or specialized fixtures to clamp spherical parts. While the three-jaw chuck with soft jaws can fix the ball to a certain extent, it requires repeated adjustments to the position and clamping force of the soft jaws for balls of different sizes. This process is not only time-consuming but also demands a high level of operator skill; even slight errors can lead to ball positioning deviations, affecting subsequent machining accuracy. Specialized fixtures typically employ a split V-block structure, using a screw to drive the clamping block to fix the ball. However, because their clamping range is limited by the opening of the V-block, the screw feed rate needs to be adjusted multiple times during use, and they cannot quickly switch between different sized spherical workpieces for machining. Therefore, existing technologies suffer from low clamping efficiency and poor size adaptability. Utility Model Content

[0004] In view of this, the present invention provides a quick clamping fixture for sphere machining, which can solve the problems of low clamping efficiency and poor size adaptability.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a quick clamping fixture for sphere machining, including a fixture that comprises a base module, a wire cutting positioning module, a quick locking mechanism, and a size adapter component. The base module has an upper pressure plate at its top and a fixed base at its bottom, providing a stable support foundation for the entire fixture. The wire cutting positioning module is mounted on the base module for high-precision radial positioning of the sphere. The quick locking mechanism includes a linkage locking device consisting of two sets of joint bolts and two sets of shaft pins, located on both sides of the base module, for radial locking of the sphere by rotating the joint bolts to drive the shaft pins. The size adapter component is a replaceable positioning bushing for adapting to spheres of different specifications. The positioning bushing is installed inside the wire cutting positioning module to achieve compatible clamping of spheres of different sizes.

[0007] The technical advantages of the quick clamping fixture for spherical machining provided by this utility model are as follows: radial locking is achieved by driving the shaft pin through rotating joint bolts, and combined with the quick-change positioning bushing, the clamping time of a single workpiece can be shortened to less than 1 minute, which significantly improves the machining efficiency; by changing the positioning bushing with different inner diameters, it can be adapted to spheres of various sizes, reducing the number of special toolings and reducing production costs, and is especially suitable for multi-variety small-batch machining scenarios.

[0008] Based on the above technical solution, the quick clamping fixture for sphere machining of this utility model can be further improved as follows:

[0009] The base module is a casting platform with T-slots, made of HT250.

[0010] Furthermore, the wire cutting positioning module includes a hemispherical positioning cavity with a cavity diameter tolerance of ±0.02mm, and a positioning bushing is fixedly installed inside the hemispherical positioning cavity.

[0011] Furthermore, the linkage locking device uses a snap ring pin and a fisheye bolt. The snap ring pin is fixedly installed on the base module, and the fisheye bolt is sleeved on the snap ring pin. The fisheye end of the fisheye bolt is engaged with the pin.

[0012] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by rotating the fisheye bolt around the snap ring pin, the pin is driven to move in a direction perpendicular to the axis of the ball, thereby achieving radial clamping of the ball.

[0013] Furthermore, a nut is provided at the fisheye bolt on one side of the base module, and the nut is threadedly connected to the fisheye bolt.

[0014] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by rotating the nut, the tightness of the fit between the fisheye bolt and the snap ring pin can be adjusted, thereby accurately controlling the movement distance of the pin and the clamping force on the ball, ensuring stable clamping under different working conditions.

[0015] Furthermore, the upper pressure plate is connected to the T-slot of the base module by bolts, and its position can be adjusted along the T-slot. A rubber buffer layer is provided on the bottom surface of the upper pressure plate.

[0016] The beneficial effects of adopting the above-mentioned improved scheme are as follows: when the axial fixation of the ball is achieved by the upper pressure plate, the rubber buffer layer can avoid direct contact between the upper pressure plate and the surface of the ball, which may cause crushing, and at the same time provide a certain elastic buffer to ensure the reliability of axial fixation.

[0017] Furthermore, the center of the hemispherical positioning cavity coincides with the center line of the base module to ensure that the sphere is in the center position of the tooling after clamping.

[0018] Compared with the prior art, the advantages of the quick clamping fixture for spherical machining provided by this utility model are: radial locking is achieved by driving the shaft pin through rotating joint bolts, and combined with the quick-change positioning bushing, the clamping time of a single workpiece can be shortened to less than 1 minute, which significantly improves the machining efficiency; by changing the positioning bushing with different inner diameters, it can be adapted to spheres of various sizes, reduce the number of special tooling, reduce production costs, and is especially suitable for multi-variety small-batch processing scenarios. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a quick-clamping fixture for machining spheres;

[0021] Figure 2 A top view of a quick-clamping fixture for machining spheres;

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 10. Base module; 101. Upper pressure plate; 102. Fixing seat; 11. Wire cutting positioning module; 111. Hemispherical positioning cavity; 12. Quick locking mechanism; 121. Fish eye bolt; 122. Snap ring pin; 13. Size adapter component; 131. Positioning bushing; 14. Nut. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0025] like Figure 1Figure 2 shows an embodiment of a quick-clamping fixture for sphere processing provided by this utility model. In this embodiment, the fixture includes a base module 10, a wire cutting positioning module 11, a quick-locking mechanism 12, and a size adaptation component 13. The base module has an upper pressure plate 101 on its upper part and a fixed seat 102 at its bottom, which provides a stable support foundation for the entire fixture. The wire cutting positioning module is set on the base module and is used for high-precision radial positioning of the sphere. The quick-locking mechanism includes a linkage locking device composed of two sets of joint bolts and two sets of shaft pins. The quick-locking mechanism is set on both sides of the base module and is used to drive the shaft pins by rotating the joint bolts to achieve radial locking of the sphere. The size adaptation component is a replaceable positioning bushing 131, which is used to adapt to spheres of different specifications. The positioning bushing is installed in the wire cutting positioning module to achieve compatible clamping of spheres of different sizes.

[0026] In the above technical solution, the base module is a casting platform with a T-slot, and the material is HT250.

[0027] Furthermore, in the above technical solution, the wire cutting positioning module includes a hemispherical positioning cavity 111 with a cavity diameter tolerance of ±0.02mm, and a positioning bushing is fixedly installed inside the hemispherical positioning cavity.

[0028] Furthermore, in the above technical solution, the linkage locking device uses a snap ring pin 121 and a fisheye bolt 122 for cooperation. The snap ring pin is fixedly installed on the base module, and the fisheye bolt is sleeved on the snap ring pin. The fisheye end of the fisheye bolt cooperates with the pin.

[0029] Among them, the linkage locking device utilizes the hinge linkage principle, making the locking operation more convenient and efficient, and can effectively disperse the clamping force to avoid excessive local force on the ball.

[0030] Furthermore, in the above technical solution, a nut 14 is provided at the fisheye bolt on one side of the base module, and the nut is threadedly connected to the fisheye bolt.

[0031] Furthermore, in the above technical solution, the upper pressure plate is connected to the T-slot of the base module by bolts, and its position can be adjusted along the T-slot. A rubber buffer layer is provided on the bottom surface of the upper pressure plate.

[0032] Furthermore, in the above technical solution, the center of the hemispherical positioning cavity coincides with the center line of the base module, which is used to ensure that the sphere is in the center position of the tooling after clamping.

[0033] Example 1:

[0034] The outer circle of the positioning bushing and the inner hole of the hemispherical positioning cavity adopt an H7 / g6 clearance fit. The inner hole of the positioning bushing is a hemispherical structure adapted to the ball to be clamped. This fit method can not only ensure the stability of the positioning bushing installation, but also facilitate quick replacement. At the same time, the hemispherical inner hole can fit tightly with the ball, improving the positioning accuracy.

[0035] Example 2:

[0036] Two sets of joint bolts and two sets of axle pins are symmetrically arranged on both sides of the base module. When radially locking is performed, the two sets of axle pins move synchronously towards the ball. The radial component force is offset by the symmetrical clamping force, which prevents the ball from shifting during the clamping process and further improves the clamping accuracy and stability.

[0037] Specifically, the principle of this utility model is as follows: In use, the positioning bushing of the corresponding size is inserted into the hemispherical positioning cavity, ensuring the bushing is properly installed and tightly fitted to the cavity. The sphere is placed in the center of the positioning cavity, ensuring full contact between the sphere and the inner hole of the hemispherical positioning bushing. The fisheye bolts on both sides of the base module are rotated respectively. Through the linkage between the fisheye bolts and the snap ring pin, the pin is moved towards the sphere, achieving radial locking of the sphere. During rotation, the clamping force can be adjusted using the nut at one side of the fisheye bolt. Finally, the upper pressure plate is installed in a suitable position on the base module using bolts, using the upper pressure plate to axially fix the sphere, completing the clamping of the sphere, ready for subsequent processing. After processing, the tooling is disassembled in reverse order, the sphere is removed, and the positioning bushing is replaced, preparing for the next clamping.

Claims

1. A quick-clamping fixture for machining spheres, comprising a clamping fixture, characterized in that, The fixture includes a base module, a wire cutting positioning module, a quick-locking mechanism, and a size adapter component. The base module has an upper pressure plate on top and a fixed seat at the bottom, providing a stable support foundation for the entire fixture. The wire cutting positioning module is mounted on the base module and is used for high-precision radial positioning of the sphere. The quick-locking mechanism consists of a linkage locking device composed of two sets of joint bolts and two sets of shaft pins. The quick-locking mechanism is located on both sides of the base module and is used to drive the shaft pins by rotating the joint bolts to achieve radial locking of the sphere. The size adapter component is a replaceable positioning bushing used to adapt to spheres of different specifications. The positioning bushing is installed inside the wire cutting positioning module to achieve compatible clamping of spheres of different sizes.

2. The quick-clamping fixture for sphere machining according to claim 1, characterized in that, The base module is a cast platform with T-slots, made of HT250.

3. The quick-clamping fixture for sphere machining according to claim 2, characterized in that, The wire EDM positioning module includes a hemispherical positioning cavity with a cavity diameter tolerance of ±0.02mm, and a positioning bushing is fixedly installed inside the hemispherical positioning cavity.

4. The quick-clamping fixture for sphere machining according to claim 3, characterized in that, The linkage locking device uses a snap ring pin and a fisheye bolt. The snap ring pin is fixedly installed on the base module, and the fisheye bolt is sleeved on the snap ring pin. The fisheye end of the fisheye bolt is engaged with the pin.

5. The quick-clamping fixture for sphere machining according to claim 4, characterized in that, A nut is provided at the fisheye bolt on one side of the base module, and the nut is threadedly connected to the fisheye bolt.

6. The quick-clamping fixture for sphere machining according to claim 5, characterized in that, The upper pressure plate is connected to the T-slot of the base module by bolts, and its position can be adjusted along the T-slot. A rubber buffer layer is provided on the bottom surface of the upper pressure plate.

7. The quick-clamping fixture for sphere machining according to claim 6, characterized in that, The center of the hemispherical positioning cavity coincides with the center line of the base module to ensure that the sphere is in the center position of the tooling after clamping.

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