Grinding head structure for silicon core machining

Abstract

The grinding head structure comprises a machine tool transmission shaft, a grinding head body is installed on the machine tool transmission shaft, a threaded hole and a conical hole are sequentially formed in the end, facing the grinding head body, of the machine tool transmission shaft from inside to outside in the axial direction of the machine tool transmission shaft, and the grinding head body is provided with a threaded part matched with the threaded hole and a positioning part matched with the conical hole. A grinding center hole penetrating through the grinding head body is formed in the grinding head body in the axial direction, the grinding center hole comprises a grinding hole and a conical grinding transition hole which are sequentially formed in the axial direction of the grinding head body, the large end of the conical grinding transition hole faces the outer side, the small end of the conical grinding transition hole faces the grinding hole, the grinding hole faces a machine tool transmission shaft, and a chip removal groove is formed in the inner wall of the grinding hole in the axial direction. According to the grinding head, through the arrangement of the chip removal groove, residual chips and cooling water can be conveniently removed in the grinding and cutting process, and the chip removal capacity of the grinding head is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon core processing, in particular to a grinding head structure for silicon core processing. Background Technique

[0002] In the practical application of polysilicon, the deposition center structure in the reduction furnace consists of two vertically arranged and one horizontally arranged silicon cores. During the assembly process, the vertical silicon cores are fixed by graphite jigs. The contact stability between the lower cone of the vertical silicon core and the graphite jig directly affects the success rate of the finished silicon rod being loaded into the furnace for growth.

[0003] Currently, the clamping method of the silicon core in the reduction furnace is mainly taper hole fitting. The existing grinding cone processing usually uses a conical grinding head to grind the conical surface of the lower cone of the silicon core so as to match the taper hole of the reduction jig. As Figure 5 shown, the conical grinding head is installed on the machine tool transmission shaft. However, in the actual processing operation, this existing conical grinding head has the problem of poor discharge of silicon chips. Content of the Utility Model

[0004] Aiming at the problems existing in the prior art, the utility model provides a grinding head structure for silicon core processing.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a grinding head structure for silicon core processing, including a machine tool transmission shaft, a grinding head body is installed on the machine tool transmission shaft. One end of the machine tool transmission shaft facing the grinding head body is sequentially provided with a threaded hole and a conical hole from the inside to the outside along its axial direction. The grinding head body has a threaded portion matched with the threaded hole and a positioning portion matched with the conical hole. The grinding head body has a grinding center hole penetrating through the body along its axial direction. The grinding center hole includes a grinding hole and a conical grinding transition hole arranged sequentially along the axial direction of the grinding head body. The large end of the conical grinding transition hole faces the outside, and the small end faces the grinding hole. The grinding hole faces the machine tool transmission shaft, and a chip removal groove is arranged on the inner wall of the grinding hole along its axial direction.

[0006] As a preferred scheme, there are multiple chip removal grooves, and the multiple chip removal grooves are evenly distributed along the circumferential direction of the grinding hole.

[0007] As a preferred scheme, the cross section of the chip removal groove is rectangular, triangular or semi-circular.

[0008] As a preferred scheme, the chip removal groove is spiral.

[0009] As a preferred scheme, the end face of the grinding head body far from the machine tool transmission shaft is the working face. The large end of the conical grinding transition hole is connected with the working face through a first fillet transition, and the small end of the conical grinding transition hole is connected with the grinding hole through a second fillet transition.

[0010] As a preferred solution, grinding layers are provided on the inner wall of the grinding hole, the inner wall of the tapered grinding transition hole, and the working surface.

[0011] As a preferred solution, the grinding layer is emery.

[0012] As a preferred solution, the grinding head body has a smooth shaft portion at the rear end of the positioning portion, and a plurality of discontinuous planes are provided on the outer circumferential surface of the smooth shaft portion.

[0013] The beneficial effects of the present application are as follows: 1. By providing a chip removal groove in the present application, it helps to conveniently remove residual chips and cooling water during the grinding process, improving the chip removal ability of the grinding head. At the same time, the contact area between the cooling water and the silicon core is increased, enhancing the cooling efficiency during the grinding operation.

[0014] 2. The positioning portion of the present application that is threaded with the threaded hole of the threaded portion and is fitted with the tapered hole makes the grinding head body firmly installed on the machine tool transmission shaft, ensuring the coaxiality and firmness between the grinding head body and the machine tool transmission shaft.

[0015] 3. By providing a tapered grinding transition hole, the sudden change in the diameter of the upper part of the silicon core cone is avoided, reducing stress concentration.

[0016] 4. By providing a first rounded corner and a second rounded corner, the appearance of sharp corners is avoided, extending the service life of the grinding head body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is Figure 1 the schematic structural diagram of the machine tool transmission shaft in

[0019] Figure 3 is a schematic structural diagram of the grinding head body of the present utility model;

[0020] Figure 4 is a top view of the grinding head body of the present utility model;

[0021] Figure 5 is a schematic structural diagram of the prior art.

[0022] Reference numerals in the drawings: 1. Machine tool transmission shaft, 11. Central through hole, 12. Threaded hole, 13. Tapered hole, 2. Grinding head body, 21. Grinding center hole, 211. Grinding hole, 212. Tapered grinding transition hole, 22. Threaded portion, 23. Positioning portion, 24. Plane, 3. Grinding layer, 4. Chip removal groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that in the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] Please refer to Figures 1-4 , an embodiment of the present utility model provides a grinding head structure for silicon core processing, including a machine tool transmission shaft 1, a grinding head body 2 is installed on the machine tool transmission shaft 1. One end of the machine tool transmission shaft 1 facing the grinding head body 2 is sequentially provided with a threaded hole 12 and a tapered hole 13 from inside to outside along its axial direction. The grinding head body 2 has a threaded portion 22 that cooperates with the threaded hole 12 and a positioning portion 23 that cooperates with the tapered hole 13. The grinding head body 2 has a grinding center hole 21 that penetrates the body along its axial direction. The grinding center hole 21 includes a grinding hole 211 and a tapered grinding transition hole 212 that are sequentially arranged along the axial direction of the grinding head body 2. The large end of the tapered grinding transition hole 212 faces outward, and the small end faces the grinding hole 211. The grinding hole 211 faces the machine tool transmission shaft 1, and a chip removal groove 4 is provided on the inner wall of the grinding hole 211 along its axial direction.

[0025] Among them, the threaded portion 22 has an external thread, and the threaded hole 12 has an internal thread that cooperates with the external thread of the threaded portion 22. Combining Figure 4 as shown, there are a plurality of chip removal grooves 4, and the plurality of chip removal grooves 4 are evenly distributed along the circumferential direction of the grinding hole 211. The number of chip removal grooves 4 is 2 - 6. In the embodiment of the present application, the number of chip removal grooves 4 is 2. The cross-section of the chip removal groove 4 is rectangular, triangular or semi-circular. The length of the chip removal groove 4 is equal to the length of the grinding hole 211.

[0026] Specifically, as Figure 1 , Figure 3 and Figure 4As shown in the figure, the center of the machine tool transmission shaft 1 has a central through hole communicating with the threaded hole 12, and the central through hole is used for cooling water to pass through. The end face of the grinding head body 2 away from the machine tool transmission shaft 1 is the working face. The large end of the conical grinding transition hole 212 is connected to the working face through a first fillet transition, and the small end of the conical grinding transition hole 212 is connected to the grinding hole 211 through a second fillet transition. By setting the first fillet and the second fillet, the appearance of sharp corners is avoided, and the service life of the grinding head body 2 is prolonged.

[0027] More specifically, grinding layers 3 are provided on the inner wall of the grinding hole 211, the inner wall of the conical grinding transition hole 212, and the working face. The grinding layer 3 is emery. The emery is electroplated on the inner wall of the grinding hole 211, the inner wall of the conical grinding transition hole 212, and the working face.

[0028] Furthermore, a light shaft portion is provided at the rear end of the positioning portion 23 on the grinding head body 2. A plurality of discontinuous planes 24 are provided on the outer circumferential surface of the light shaft portion. The number of planes 24 is 2 or 4 or 6 or 8. In this embodiment, the number of planes 24 is 2. By setting the planes 24, it is convenient for a wrench to rotate the grinding head body 2, thus facilitating installation and disassembly. It should be noted that the parts not detailed in this application are all prior arts.

[0029] In addition, the threaded portion 22, the positioning portion 23, and the light shaft portion are arranged in sequence along the axial direction of the grinding head body 2. The threaded portion 22 faces the machine tool transmission shaft 1. The threaded portion 22, the positioning portion 23, and the light shaft portion are integrally formed. An annular relief groove is provided on the grinding head body 2 between the threaded portion 22 and the positioning portion 23.

[0030] In this application, a wrench is used to clamp on the plane 24, and the grinding head body 2 is twisted to install the threaded connection portion 22 into the threaded hole 12 of the machine tool transmission shaft 1, and the positioning portion 23 is clamped into the conical hole 13, so as to ensure the coaxiality of the grinding head body 2 and the machine tool transmission shaft 1. During operation, the processed end of the silicon core enters the conical grinding transition hole 212 and the grinding hole 211 to contact and grind according to the set speed, and the silicon chips and cooling water are discharged from the chip removal groove 4.

[0031] In this application, by setting the chip removal groove 4, it is helpful to conveniently remove the residual chips and cooling water during the grinding process, and improve the chip removal ability of the grinding head. At the same time, the contact area between the cooling water and the silicon core is increased, and the cooling efficiency during the grinding operation is improved. By setting the conical grinding transition hole 212, the sudden change in the diameter of the upper part of the silicon core cone is avoided, and the stress concentration is reduced.

[0032] Of course, the present utility model is not limited to the above-described embodiments. The following also provides several other embodiments based on the design concept of the present utility model.

[0033] For example, in other embodiments, different from the above-described embodiments, the chip removal groove 4 is spiral.

[0034] It should be noted that the above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above embodiments. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A grinding head structure for silicon core processing, comprising a machine tool transmission shaft (1), characterized in that: A grinding head body (2) is mounted on a machine tool transmission shaft (1); one end of the machine tool transmission shaft (1) facing the grinding head body (2) is provided with a threaded hole (12) and a tapered hole (13) in sequence from the inside to the outside along its axial direction; the grinding head body (2) has a threaded portion (22) matched with the threaded hole (12) and a positioning portion (23) matched with the tapered hole (13); the grinding head body (2) has a grinding center hole (21) penetrating the body along its axial direction; the grinding center hole (21) comprises a grinding hole (211) and a tapered grinding transition hole (212) arranged in sequence along the axial direction of the grinding head body (2); the large end of the tapered grinding transition hole (212) faces outward and the small end faces the grinding hole (211); the grinding hole (211) is arranged toward the machine tool transmission shaft (1); and a chip removal groove (4) is provided on the inner wall of the grinding hole (211) along its axial direction.

2. A grinding head structure for silicon core processing according to claim 1, characterized in that: There are a plurality of chip removal grooves (4), and the plurality of chip removal grooves (4) are evenly distributed along the circumference of the grinding hole (211).

3. A grinding head structure for silicon core processing according to claim 1 or 2, characterized in that: The cross section of the chip removal groove (4) is rectangular, triangular or semicircular.

4. The grinding head structure for silicon core processing according to claim 1, characterized in that: The chip removal groove (4) is spiral-shaped.

5. The grinding head structure for silicon core processing according to claim 1, characterized in that: The end surface of the grinding head body (2) away from the machine tool transmission shaft (1) is a working surface, the large end of the conical grinding transition hole (212) is connected to the working surface via a first fillet transition, and the small end of the conical grinding transition hole (212) is connected to the grinding hole (211) via a second fillet transition.

6. A grinding head structure for silicon core processing according to claim 5, characterized in that: A grinding layer (3) is provided on the inner wall of the grinding hole (211), the inner wall of the conical grinding transition hole (212), and the working surface.

7. A grinding head structure for silicon core processing according to claim 6, characterized in that: The grinding layer (3) is diamond sand.

8. The grinding head structure for silicon core processing according to claim 1, characterized in that: The grinding head body (2) is provided with an optical axis portion at the rear end of the positioning portion (23), and a plurality of discontinuous planes (24) are provided on the outer circumferential surface of the optical axis portion.

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