A grinding top disc for a crystal rod material

Abstract

The utility model discloses a kind of grinding top disc of crystal bar material, including grinding machine main body and workpiece to be processed, the first top head and second top head are correspondingly installed on the grinding machine main body, the clamping end center of the first top head and second top head is equipped with centering protrusion, and the clamping end of the first top head and second top head is respectively distributed with a plurality of first driving protrusion around centering protrusion, the centering precision of this crystal bar material grinding top disc is significantly improved, high-precision axial positioning of crystal bar can be realized by the accurate cooperation of centering protrusion and centering groove, effectively control radial run-out in grinding process, make the cylindricity error of processed crystal bar reduce, driving force transmission is stable and reliable, using the rigid meshing transmission of first driving protrusion and second driving protrusion, replace traditional friction force transmission, avoid the phenomenon of skidding caused by speed fluctuation or load change, make the rotational angular velocity consistency of crystal bar improve, surface roughness reduces.

Description

Technical Field

[0001] This utility model relates to the field of crystal rod material processing technology, specifically a grinding top plate for crystal rod materials. Background Technology

[0002] In the processing of crystal materials (such as optical crystals and semiconductor crystals), the outer cylindrical grinding of crystal rods is a crucial process to ensure their dimensional accuracy and surface quality. In existing technologies, crystal rods are typically positioned and driven using a double-mandrel structure on a grinding machine. The mandrels directly contact both ends of the crystal rod, rotating it through friction or mechanical clamping, and then working in conjunction with the grinding wheel to complete the grinding process. However, traditional mandrel structures suffer from insufficient centering accuracy, unstable drive force transmission, and the risk of workpiece damage, and also exhibit poor adaptability. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a grinding top plate for crystal rod materials, which improves centering accuracy and transmission stability, while reducing the risk of workpiece damage, adapts to the processing needs of crystal rods of various specifications, and can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A grinding top plate for crystal rod material includes a grinding machine body and a workpiece to be processed. A first top head and a second top head are correspondingly installed on the grinding machine body. The clamping ends of the first top head and the second top head are provided with a centering protrusion at their centers. The clamping ends of the first top head and the second top head are respectively provided with a plurality of first driving protrusions distributed circumferentially around the centering protrusion. The two ends of the workpiece to be processed are respectively fixedly connected to the clamping top plate. The end face of the clamping top plate opposite to the workpiece to be processed is provided with a centering connector. The centering connector has a centering groove adapted to the centering protrusion at its center. The circumferential surface of the centering connector is integrally formed with a plurality of second driving protrusions corresponding to and cooperating with the driving protrusions.

[0005] As a preferred technical solution of this utility model, the workpiece to be processed is fixedly connected to the clamping top plates on both sides by an adhesive layer.

[0006] As a preferred embodiment of this utility model, the outer diameter of the clamping top plate is smaller than the outer diameter of the workpiece to be processed.

[0007] As a preferred technical solution of this utility model, the first driving protrusion is provided in two and symmetrically distributed with the centering protrusion as the center, and the second driving protrusion is provided in two and symmetrically distributed with the centering groove as the center. The two sets of symmetrical first driving protrusions and second driving protrusions are in one-to-one correspondence and cooperate for transmission.

[0008] As a preferred embodiment of this utility model, the centering groove is a hemispherical groove, and the centering protrusion is a hemispherical protrusion structure adapted to the centering groove.

[0009] Compared with the prior art, the beneficial effects of this utility model are: 1. The centering accuracy is significantly improved. Through the precise matching of the centering protrusion and the centering groove (especially the line contact matching of the hemispherical structure), high-precision axial positioning of the crystal rod can be achieved, effectively controlling the radial runout during the grinding process and reducing the cylindricity error of the processed crystal rod. 2. Stable and reliable driving force transmission: The rigid meshing transmission of the first and second driving protrusions replaces the traditional friction transmission, avoiding slippage caused by speed fluctuations or load changes, thus improving the consistency of the crystal rod's rotational angular velocity and reducing surface roughness. 3. Effectively protects the workpiece to be processed. The crystal rod is indirectly connected by the clamping top plate, avoiding direct contact between the top head and brittle crystal material. Combined with the buffering effect of the adhesive layer, the damage rate of the workpiece end can be reduced. 4. Optimization of versatility and economy: The clamping top plate can be flexibly replaced according to the specifications of the crystal rod, while the structure of the grinding machine mandrel remains uniform, shortening the changeover time. At the same time, the outer diameter of the clamping top plate is smaller than the outer diameter of the workpiece, which can avoid interference between the grinding wheel and the top plate during grinding and reduce tool wear. 5. The structure is simple and easy to implement. All components adopt an integrated molding or simple assembly structure, which does not require a complex control system, resulting in low manufacturing costs and easy modification and upgrading on existing grinding machines. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram showing the detailed structure of the centering protrusion installation of this utility model.

[0012] Figure 3 This is a schematic diagram of the clamping top plate structure of this utility model.

[0013] Figure 4 This is a schematic diagram of the first top structure of this utility model.

[0014] Figure 5 This is a schematic diagram of the connection structure between the workpiece to be processed and the clamping top plate of this utility model.

[0015] In the figure: grinding machine body 1, first mandrel 2, first drive protrusion 21, centering protrusion 22, workpiece to be processed 3, second mandrel 4, clamping top plate 5, centering connector 51, second drive protrusion 52, centering groove 53, adhesive layer 54. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-5 This utility model provides a technical solution: A grinding top plate for crystal rod material includes a grinding machine body 1 and a workpiece 3 to be processed. A first top head 2 and a second top head 4 are correspondingly installed on the grinding machine body 1. The clamping ends of the first top head 2 and the second top head 4 are provided with centering protrusions 22. The clamping ends of the first top head 2 and the second top head 4 are respectively provided with multiple first driving protrusions 21 distributed circumferentially around the centering protrusions 22. The two ends of the workpiece 3 to be processed are respectively fixedly connected to a clamping top plate 5. The end face of the clamping top plate 5 away from the workpiece 3 to be processed is provided with a centering connector 51. The centering connector 51 has a centering groove 53 adapted to the centering protrusions 22 at its center. The circumferential surface of the centering connector 51 is integrally formed with multiple second driving protrusions 52 that correspond to and cooperate with the driving protrusions 21.

[0018] The workpiece 3 to be processed is fixedly connected to the clamping top plates 5 on both sides by an adhesive layer 54.

[0019] The outer diameter of the clamping top plate 5 is smaller than the outer diameter of the workpiece 3 to be processed.

[0020] Two first driving protrusions 21 are provided and symmetrically distributed with the centering protrusion 22 as the center. Two corresponding second driving protrusions 52 are provided and symmetrically distributed with the centering groove 53 as the center. The two sets of symmetrical first driving protrusions 21 and second driving protrusions 52 are in one-to-one correspondence and cooperate for transmission.

[0021] The centering groove 53 is a hemispherical groove, and the centering protrusion 22 is a hemispherical protrusion structure that matches the centering groove 53.

[0022] Working principle: This grinding top plate achieves stable clamping and precise transmission of the crystal rod through a dual-function structure of "centering-drive" separation. The specific process is as follows: During the workpiece clamping stage, the two ends of the workpiece 3 to be processed are fixedly connected to the clamping top plate 5 through the adhesive layer 54 to form an integral workpiece assembly. The first mandrel 2 and the second mandrel 4 of the grinding machine body 1 move towards each other, so that the centering protrusion 22 of the mandrel is embedded in the centering groove 53 of the centering connector 51 on the clamping top plate, thus completing axial centering; at the same time, the first drive protrusion 21 and the second drive protrusion 52 mesh with each other to form a circumferential transmission connection.

[0023] During the grinding stage, the grinding machine body 1 drives the first mandrel 2 to rotate. Through the meshing of the first driving protrusion 21 and the second driving protrusion 52, the clamping top plate 5 and the workpiece 3 to be processed rotate synchronously. The engagement of the centering protrusion 22 and the centering groove 53 restricts the radial displacement of the workpiece 3 to ensure the stability of the rotation axis. The grinding wheel of the grinding machine body 1 feeds radially to grind the outer diameter of the crystal rod. Since the outer diameter of the clamping top plate 5 is smaller than the outer diameter of the workpiece 3, the grinding wheel only acts on the surface of the crystal rod, avoiding interference with the top plate.

[0024] The transmission protection mechanism, with the symmetrically distributed first driving protrusion 21 and second driving protrusion 52, ensures that the driving force is evenly distributed, avoiding the workpiece 3 from swaying due to uneven force. The hemispherical centering structure of the centering protrusion 22 and the centering groove 53 can adapt to small installation errors. By transforming surface contact into line contact, it reduces contact stress while ensuring centering accuracy and protecting the end of the workpiece.

[0025] Based on the above principles, this grinding top plate achieves the synergistic effect of "high-precision centering - stable transmission - workpiece protection" in the crystal rod grinding process, significantly improving processing quality and efficiency.

[0026] 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 grinding head for a crystal bar material, comprising a grinding machine body (1) and a workpiece (3) to be processed, characterized in that: The grinding machine body (1) is equipped with a first mandrel (2) and a second mandrel (4). The clamping ends of the first mandrel (2) and the second mandrel (4) are provided with centering protrusions (22). The clamping ends of the first mandrel (2) and the second mandrel (4) are respectively distributed with multiple first driving protrusions (21) around the centering protrusions (22). The two ends of the workpiece (3) to be processed are respectively fixedly connected to a clamping top plate (5). The end face of the clamping top plate (5) away from the workpiece (3) to be processed is provided with a centering connector (51). The centering connector (51) is provided with a centering groove (53) that matches the centering protrusion (22). The circumferential surface of the centering connector (51) is integrally formed with multiple second driving protrusions (52) that correspond to and cooperate with the driving protrusions (21).

2. A ground top disc of a crystal bar material according to claim 1, characterized in that: The workpiece to be processed (3) is fixedly connected to the clamping top plates (5) on both sides through an adhesive layer (54).

3. The ground top disc of a crystal bar material according to claim 1, characterized in that: The outer diameter of the clamping top plate (5) is smaller than the outer diameter of the workpiece (3) to be processed.

4. The ground top disc of a crystal bar material according to claim 1, characterized in that: The first driving protrusion (21) has two parts and is symmetrically distributed with the centering protrusion (22) as the center. The second driving protrusion (52) has two parts and is symmetrically distributed with the centering groove (53) as the center. The two sets of symmetrical first driving protrusions (21) and second driving protrusions (52) are in one-to-one correspondence and cooperate for transmission.

5. The ground top disc of a crystal bar material according to claim 1, characterized in that: The centering groove (53) is a hemispherical groove, and the centering protrusion (22) is a hemispherical protrusion structure that is adapted to the centering groove (53).

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