Cutting tool for graphite material processing

Abstract

The invention discloses a cutting tool for graphite material machining, and belongs to the technical field of cutting tools, the cutting tool comprises a tool bit and a tool handle, and the tool bit and the tool handle are integrally arranged; the tool bit is provided with a chip groove, and a cutting edge is arranged in the circumferential direction of the tool bit and extends to the top of the tool bit. The cutting edge is provided with a side edge and a bottom edge; and the cutting edge is made of a SiC material. The cutting tool can effectively prevent a graphite material from abrading and corroding the tool, the phenomenon that the tool slides due to formation of a graphite transfer film is avoided, it is ensured that the tool does not vibrate during normal cutting, and the machining stability and reliability of the tool on the graphite material are improved; the metal powder is effectively prevented from being embedded into the surface of the processed graphite material, the graphite material is prevented from forming metal pollution, and the preparation of the graphite base element is met; meanwhile, the wear resistance and the impact resistance during cutting can be effectively improved through the cutting edge, the service life of the cutting tool is prolonged, and the production cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting tools, in particular to a cutting tool for processing graphite materials. Background Art

[0002] The graphite susceptor is one of the core components in MOCVD equipment. It is the carrier and heating element of the chip substrate. Its thermal stability, thermal uniformity and other performance parameters play a decisive role in the quality of epitaxial material growth and directly determine the uniformity and purity of epitaxial thin film materials. Therefore, the quality of the graphite susceptor directly affects the preparation of epitaxial wafers. The graphite susceptor element is a product made of graphite material by milling, which is achieved by generating discontinuous chip particles or powders through the brittle fracture of the graphite material.

[0003] In the related art, commonly used cutting tool materials include carbide milling cutters, diamond-coated carbide milling cutters, PCD welding pad milling cutters, etc. However, these cutting tools contain various metal components. After the tool is worn, it will form high-temperature friction with the graphite material, embedding the metal components into the processed surface, forming metal pollution, and this part of the pollution cannot be effectively removed. Once the high-purity graphite base contains excessive metal, it cannot be used. In addition, during high-speed milling, after the graphite chips are formed, they are very easy to accumulate and adhere to the surface of the tool when flowing out along the front cutting edge to form a graphite transfer film, which causes wear and corrosion of the tool. In addition, the graphite transfer film is lubricating, and the tool slips during cutting, causing vibration or jumping during cutting. Summary of the invention

[0004] An object of the present invention is to provide a cutting tool for machining graphite materials to solve at least one aspect of the problems and defects raised in the above-mentioned background technology.

[0005] Specifically, the present invention discloses a cutting tool for graphite material processing, comprising:

[0006] A knife head and a knife handle, wherein the knife head and the knife handle are integrated;

[0007] The cutter head is provided with a chip removal groove, and a cutting edge is provided along the circumference of the cutter head, and the cutting edge extends to the top of the cutter head;

[0008] The cutting edge is provided with a side edge and a bottom edge;

[0009] The cutting edge is made of SiC material.

[0010] The cutting tool for graphite material processing according to this solution has at least the following technical effects:

[0011] The cutting tool for processing graphite material has a cutting edge arranged along the circumference of the tool head, the cutting edge extends to the top of the tool head, and the cutting edge is made of SiC material, is subjected to double-sided fine grinding, polishing and other processes, is cut into a fixed size by laser, and is then connected to the tool head by a ceramic welding agent, so that the wear and corrosion of the tool by the graphite material can be effectively prevented, the formation of a graphite transfer film causing the tool to slip, and it is ensured that the tool does not vibrate during normal cutting, thereby improving the processing stability and reliability of the tool for graphite materials;

[0012] The cutting edge of the SiC material is a high-purity inorganic material with a Mohs hardness of 9.5-9.7. When the cutting tool cuts graphite material, only the cutting edge is in contact with the graphite material, and the cutter head and the handle only serve as carriers and do not directly contact the graphite material. Therefore, the cutting edge will not produce metal powder during cutting, effectively avoiding the embedding of metal powder into the surface of the processed graphite material, preventing the graphite material from forming metal pollution, ensuring the processing purity of the graphite material, and making the processed graphite material meet the preparation of the graphite base element; at the same time, the cutting edge can effectively improve the wear resistance and impact resistance during cutting, extend the service life of the cutting tool, and reduce the cost of maintenance and replacement.

[0013] As a further solution of the present invention: the connection portion between the knife handle and the knife head is provided with a gap.

[0014] Since the connection between the tool handle and the tool head is provided with a gap, interference of cutting edge processing can be effectively avoided, and direct contact between the tool head or the tool handle and the graphite material is prevented, thereby preventing damage to the tool or the graphite material.

[0015] As a further solution of the present invention: the cutting edge is in the shape of a sheet, and its parallelism is 0mm-0.02mm.

[0016] Since the cutting edge is in the shape of a sheet and its parallelism is 0mm-0.02mm, the tool can maintain consistent cutting depth and cutting angle during the cutting process, ensuring the ultimate control of workpiece size and form and position tolerances, and achieving ultra-high precision processing of graphite materials. In addition, the tool is subjected to uniform force during the cutting process, which greatly reduces the vibration and torsional torque of the tool, improves the stability of the cutting process, reduces tool wear, and extends the service life of the tool.

[0017] As a further solution of the present invention: the side blade is provided with a first side blade clearance angle, and the angle of the first side blade clearance angle is 5°-15°.

[0018] Since the side edge is provided with a first clearance angle of the side edge, the angle of the first clearance angle of the side edge is 5°-15°, which can ensure that the side edge has a better sharp edge during cutting, making the cutting surface of the graphite material smoother, ensuring the processing quality, and will not affect functions such as chip removal, effectively improving the smoothness and efficiency of cutting.

[0019] As a further solution of the present invention: a second clearance angle of the side blade is arranged on one side of the first clearance angle of the side blade, and the angle of the second clearance angle of the side blade is 18°-35°.

[0020] By setting a second clearance angle of the side edge on one side of the first clearance angle of the side edge, the angle of the second clearance angle of the side edge is 18°-35°, which can provide effective support for the first clearance angle of the side edge, enhance the rigidity and supporting force of the first clearance angle of the side edge, prevent the side edge of the cutting edge from chipping during the cutting process, and improve the side edge stability and cutting efficiency of the cutting edge.

[0021] As a further solution of the present invention: the side edge is provided with a first helix angle and a second helix angle, and the angle of the first helix angle is not equal to the angle of the second helix angle.

[0022] Since the side edge is provided with a first helix angle and a second helix angle, the angle of the first helix angle is not equal to the angle of the second helix angle, which can effectively disperse the radial force in the cutting process, reduce the total cutting force applied to the tool and the graphite material, reduce the tool's bounce and vibration, ensure the machining accuracy, and improve the cutting stability and efficiency of the cutting tool.

[0023] As a further solution of the present invention: the bottom blade is provided with a first bottom blade clearance angle, and the angle of the first bottom blade clearance angle is 5°-15°.

[0024] Since the bottom blade is provided with a first clearance angle of the bottom blade, the angle of the first clearance angle of the bottom blade is 5°-15°, which can ensure that the bottom blade has a better sharp edge during cutting, making the cutting surface of the graphite material smoother, ensuring the processing quality, and will not affect functions such as chip removal, effectively improving the smoothness and efficiency of cutting.

[0025] As a further solution of the present invention: a second bottom edge angle is provided on one side of the first bottom edge angle, and the angle of the second bottom edge angle is 18°-35°.

[0026] By setting the second clearance angle of the bottom edge on one side of the first clearance angle of the bottom edge, the angle of the second clearance angle of the bottom edge is 18°-35°, which can provide effective support for the first clearance angle of the bottom edge, enhance the rigidity and supporting force of the first clearance angle of the bottom edge, prevent the bottom edge of the cutting edge from chipping during the cutting process, and improve the bottom edge stability and cutting efficiency of the cutting edge.

[0027] As a further solution of the present invention: the bottom blade is also provided with a blade angle.

[0028] By setting the blade angle at the bottom blade, a finishing effect can be produced when the bottom surface of the graphite material is milled, making the cutting process smoother and improving the smoothness of the graphite material processing surface, thereby effectively improving the surface quality of the graphite material processing, and reducing the vibration during cutting, improving the stability of the cutting process, avoiding the graphite material from cracking during cutting, maintaining the integrity of the workpiece, and making the processed graphite material meet the preparation of the graphite base component.

[0029] As a further solution of the present invention: four blade teeth are formed at the end of the bottom blade, namely blade tooth A, blade tooth B, blade tooth C and blade tooth D, and the angles of adjacent blade teeth are not equal.

[0030] As a further solution of the present invention: the angle between the C-tooth and the D-tooth is ≥ the angle between the A-tooth and the D-tooth by 5°-10°.

[0031] Since four teeth are formed on the end of the bottom blade, namely, A tooth, B tooth, C tooth and D tooth, the angles of adjacent teeth are not equal; the angle from C tooth to D tooth is ≥5°-10° from the angle from A tooth to D tooth. The different pitch angles of adjacent teeth can reduce the same frequency resonance effect during high-speed machining, avoid tool vibration or jump, improve the cutting stability and cutting accuracy of the cutting tool, thereby ensuring the machining quality of graphite materials, and can effectively improve the service life of the cutting tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0033] Figure 1 It is a schematic diagram of the main structure of a cutting tool for processing graphite materials;

[0034] Figure 2 It is a schematic diagram of the top view structure of a cutting tool for processing graphite materials;

[0035] Figure 3 It is a schematic diagram of the bottom edge structure of a cutting edge of a cutting tool for processing graphite materials;

[0036] Figure 4 for Figure 3 A partial enlarged view of point B;

[0037] Figure 5 It is a schematic diagram of the side edge structure of a cutting edge of a cutting tool for processing graphite materials;

[0038] Figure 6 for Figure 5 A partial enlarged view of point C;

[0039] Figure 7 for Figure 1A local enlarged view of point A;

[0040] Figure 8 It is a schematic diagram of the structure of the bottom edge teeth of a cutting tool for processing graphite materials;

[0041] Reference numerals:

[0042] 1. Cutter head; 11. Chip groove; 2. Cutter handle; 3. Cutting edge; 31. Side edge; 311. First clearance angle of side edge; 312. Second clearance angle of side edge; 313. First helix angle; 314. Second helix angle; 32. Bottom edge; 321. First clearance angle of bottom edge; 322. Second clearance angle of bottom edge; 323. Blade angle; 324. Blade teeth. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the technical solution of the present invention is further specifically described below by way of examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0044] In addition, in the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments may be implemented without these specific details. In other cases, known structures and devices are embodied in a schematic manner to simplify the accompanying drawings.

[0045] like Figure 1-7 The embodiment of the present invention shown is a cutting tool for processing graphite materials, comprising: a cutter head 1 and a cutter handle 2, wherein the cutter head 1 and the cutter handle 2 are integrated; the cutter head 1 is provided with a chip groove 11, and a cutting edge 3 is provided along the circumference of the cutter head 1, and the cutting edge 3 extends to the top of the cutter head 1; the cutting edge 3 is provided with a side edge 31 and a bottom edge 32; the cutting edge 3 is made of SiC material.

[0046] Specifically, the cutting tool for processing graphite material is provided with a cutting edge 3 along the circumference of the cutter head 1, the cutting edge 3 extends to the top of the cutter head 1, and the cutting edge 3 is made of SiC material, and after double-sided fine grinding, polishing and other processes, it is cut into a fixed size by laser, and can achieve a specified blade diameter size and blade length size, and it has a bottom blade structure and a side blade structure; and a flat-bottom milling cutter, a round nose milling cutter, and a ball-end milling cutter can be made, and then connected to the cutter head 1 through a ceramic welding agent, so that the wear and corrosion of the cutter by the graphite material can be effectively prevented, and the formation of a graphite transfer film to cause the cutter to slip, ensure that the cutter does not vibrate during normal cutting, and improve the processing stability and reliability of the cutter for graphite materials;

[0047] The cutting edge 3 of SiC material is a high-purity inorganic material with a Mohs hardness of 9.5-9.7. When the cutting tool cuts graphite material, only the cutting edge 3 is in contact with the graphite material, and the cutter head 1 and the handle 2 only serve as carriers and do not directly contact the graphite material. Therefore, the cutting edge 3 will not produce metal powder during cutting, which effectively avoids the embedding of metal powder into the surface of the processed graphite material, prevents the graphite material from forming metal pollution, ensures the processing purity of the graphite material, and makes the processed graphite material meet the preparation of the graphite base element; at the same time, the cutting edge 3 can effectively improve the wear resistance and impact resistance during cutting, extend the service life of the cutting tool, and reduce the maintenance and replacement costs.

[0048] Furthermore, a gap is provided at the connection portion between the handle 3 and the cutter head 1 .

[0049] Specifically, since the connection between the shank 3 and the cutter head 1 is provided with a clearance, interference with the machining of the cutting edge 3 can be effectively avoided, preventing the cutter head 1 or the shank 3 from directly contacting the graphite material, thereby preventing damage to the tool or the graphite material.

[0050] Furthermore, the cutting edge 3 is in a sheet shape, and its parallelism is 0 mm-0.02 mm.

[0051] Specifically, since the cutting edge 3 is in the shape of a sheet and its parallelism is 0mm-0.02mm, the tool can maintain a consistent cutting depth and cutting angle during the cutting process, ensure the limit control of the workpiece size and form and position tolerances, and achieve ultra-high precision processing of graphite materials. In addition, the tool is subjected to uniform force during the cutting process, which greatly reduces the vibration and torsional torque of the tool, improves the stability of the cutting process, reduces tool wear, and extends the service life of the tool.

[0052] like Figure 3 and Figure 4 As shown, it can be seen from the direction of the bottom edge 32 that the side edge 31 is provided with a side edge first clearance angle 311, and the angle of the side edge first clearance angle 311 is 5°-15°.

[0053] Specifically, since the side blade 31 is provided with a first side blade clearance angle 311, the angle of the first side blade clearance angle 311 is 5°-15°, which can ensure that the side blade 31 has a better sharp edge during cutting, making the cutting surface of the graphite material smoother, ensuring the processing quality, and will not affect functions such as chip removal, thereby effectively improving the smoothness and efficiency of cutting.

[0054] Furthermore, a side edge second clearance angle 312 is provided on one side of the side edge first clearance angle 311, and the angle of the side edge second clearance angle 312 is 18°-35°.

[0055] Specifically, by setting a second side edge clearance angle 312 on one side of the first side edge clearance angle 311, the angle of the second side edge clearance angle 312 is 18°-35°, which can provide effective support for the first side edge clearance angle 311, enhance the rigidity and supporting force of the first side edge clearance angle 311, prevent the side edge 31 of the cutting edge 3 from chipping during the cutting process, and improve the stability and cutting efficiency of the side edge 31 of the cutting edge 3.

[0056] Furthermore, if Figure 1 and Figure 2 As shown, the side edge 31 is provided with a first helix angle 313 and a second helix angle 314 , and the angle of the first helix angle 313 is not equal to the angle of the second helix angle 314 .

[0057] Specifically, since the side edge 31 is provided with a first helix angle 313 and a second helix angle 314, the angle of the first helix angle 313 is not equal to the angle of the second helix angle 314, the radial force in the cutting process can be effectively dispersed, thereby reducing the total cutting force applied to the tool and the graphite material, reducing the tool's bounce and vibration, ensuring machining accuracy, and improving the cutting stability and efficiency of the cutting tool.

[0058] like Figure 5 and Figure 6 As shown, it can be seen from the direction of the side edge 31 that the bottom edge 32 is provided with a bottom edge first clearance angle 321, and the angle of the bottom edge first clearance angle 321 is 5°-15°.

[0059] Specifically, since the bottom blade 32 is provided with a first bottom blade back angle 321, the angle of the first bottom blade back angle 321 is 5°-15°, which can ensure that the bottom blade 32 has a better sharp edge during cutting, making the cutting surface of the graphite material smoother, ensuring the processing quality, and will not affect the chip removal function, effectively improving the smoothness and efficiency of cutting.

[0060] Furthermore, a second bottom edge clearance angle 322 is provided on one side of the first bottom edge clearance angle 321, and the angle of the second bottom edge clearance angle 322 is 18°-35°.

[0061] Specifically, by setting a second bottom edge clearance angle 322 on one side of the first bottom edge clearance angle 321, the angle of the second bottom edge clearance angle 322 is 18°-35°, which can provide effective support for the first bottom edge clearance angle 321, enhance the rigidity and supporting force of the first bottom edge clearance angle 321, prevent the bottom edge 32 of the cutting edge 3 from chipping during the cutting process, and improve the stability and cutting efficiency of the bottom edge 32 of the cutting edge 3.

[0062] Further, if Figure 7 As shown, the bottom edge 32 is further provided with an edge corner 323 .

[0063] Specifically, by setting the blade angle 323 on the bottom blade 32, a finishing effect can be produced when the bottom surface of the graphite material is milled, making the cutting process smoother and improving the smoothness of the graphite material processing surface, thereby effectively improving the surface quality of the graphite material processing, and reducing the vibration during cutting, improving the stability of the cutting process, avoiding the graphite material from cracking during cutting, maintaining the integrity of the workpiece, and making the processed graphite material meet the preparation of the graphite base component.

[0064] According to an embodiment of the present invention, Figure 8 As shown, four blade teeth 324 are formed at the end of the bottom blade 32, namely blade tooth A, blade tooth B, blade tooth C and blade tooth D, and the angles of adjacent blade teeth 324 are not equal; the angle from blade tooth C to blade tooth D is ≥ the angle from blade tooth A to blade tooth D by 5°-10°.

[0065] Specifically, since four teeth 324 are formed at the end of the bottom blade 32, namely, A tooth, B tooth, C tooth and D tooth, the angles of adjacent teeth 324 are not equal; the angle from C tooth to D tooth ≥ the angle from A tooth to D tooth 5°-10°, the different pitch angles of adjacent teeth can reduce the same frequency resonance effect during high-speed machining, avoid tool vibration or jumping, improve the cutting stability and cutting accuracy of the cutting tool, thereby ensuring the machining quality of graphite materials, and can effectively improve the service life of the cutting tool.

[0066] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cutting tool for graphite material processing, characterized in that: include: A cutter head (1) and a cutter handle (2), wherein the cutter head (1) and the cutter handle (2) are integrally arranged; The cutter head (1) is provided with a chip removal groove (11), and a cutting edge (3) is provided along the circumference of the cutter head (1), and the cutting edge (3) extends to the top of the cutter head (1); The cutting edge (3) is provided with a side edge (31) and a bottom edge (32); The cutting edge (3) is made of SiC material.

2. The cutting tool for graphite material processing according to claim 1, characterized in that: The cutting edge (3) is in the shape of a sheet and has a parallelism of 0 mm to 0.02 mm.

3. The cutting tool for graphite material processing according to claim 1, characterized in that: The side blade (31) is provided with a side blade first clearance angle (311), and the angle of the side blade first clearance angle (311) is 5°-15°.

4. The cutting tool for graphite material processing according to claim 3, characterized in that: A side edge second clearance angle (312) is provided on one side of the side edge first clearance angle (311), and the angle of the side edge second clearance angle (312) is 18°-35°.

5. The cutting tool for graphite material processing according to claim 4, characterized in that: The side cutting edge (31) is provided with a first helix angle (313) and a second helix angle (314), and the angle of the first helix angle (313) is not equal to the angle of the second helix angle (314).

6. The cutting tool for graphite material processing according to claim 1, characterized in that: The bottom blade (32) is provided with a bottom blade first back angle (321), and the angle of the bottom blade first back angle (321) is 5°-15°.

7. The cutting tool for graphite material processing according to claim 6, characterized in that: A bottom blade second rear angle (322) is provided on one side of the bottom blade first rear angle (321), and the bottom blade second rear angle (322) has an angle of 18°-35°.

8. The cutting tool for graphite material processing according to claim 7, characterized in that: The bottom blade (32) is also provided with a blade angle (323).

9. The cutting tool for graphite material processing according to claim 1, characterized in that: Four blade teeth (324) are formed at the end of the bottom blade (32), namely blade teeth A, blade teeth B, blade teeth C and blade teeth D, and the angles of adjacent blade teeth (324) are unequal.

10. The cutting tool for graphite material processing according to claim 1, characterized in that: The angle between the C edge tooth and the D edge tooth is greater than or equal to the angle between the A edge tooth and the D edge tooth by 5°-10°.

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