A processing technology for high-precision cemented carbide rods

Abstract

The invention discloses a processing technology for high-precision cemented carbide rods, and relates to the technical field of cemented carbide processing. A centerless grinder is used to grind the original cemented carbide rod at least three times, which are the first grinding, the second grinding, and the third grinding. The centerless grinder includes a guide wheel and a grinding wheel that rotate synchronously in different phases. Grinding fluid is used for cooling during grinding, and the grinding fluid after grinding enters a filtering system for filtration and recycling. The invention uses a centerless grinder to grind the rod in multiple passes, gradually releasing the processing stress in the rod. At the same time, different grinding processes are used to control the grinding amount of the rod, and the grinding fluid filtering system is combined to reduce the defects of annular thread lines on the surface of the rod caused by sand particles or cuttings after grinding, thereby obtaining a high-precision cemented carbide rod.

Description

Technical Field

[0001] The invention relates to the field of cemented carbide processing, in particular to a processing technology for high-precision cemented carbide rods. Background Art

[0002] Due to the material properties of cemented carbide, we currently mainly use centerless grinding to process cemented carbide bars. Centerless grinding uses an automatic feeding device to smoothly send the workpiece sent by the electromagnetic feeding device to the grinding wheel and the guide wheel to complete the cylindrical grinding of mechanical processing. Due to the high degree of automation of the automatic feeding device, it is easy to ensure work safety and stable operation.

[0003] In terms of high-precision precision ground bar products, the existing processing capabilities and processing levels cannot meet the current precision and production capacity requirements in the field of consumer electronics processing. Currently, most precision ground bar products have a radial runout control accuracy of 5um, while the industry requires high-precision precision ground bar products to have a radial runout control accuracy of 2um. The existing processing level is still far from the industry's precision requirements. Therefore, it is urgently needed to develop production processes for high-precision precision ground bar products, improve the production process level of high-precision precision ground rods, and mass-produce high-precision bar products that meet the precision and production capacity requirements in the field of consumer electronics processing.

[0004] During the centerless grinding process, due to the material properties of cemented carbide, the end face of the thin rod is easily impacted by the moving grinding wheel and causes corner collapse or micro cracks, which makes the product scrap rate very high and increases the production cost. During the fine grinding process, if the excess is too much or the grinding wheel is too coarse, extremely fine threads will be produced on the surface of the part. The inclination angle of the guide wheel is too large, which makes the part move too fast, resulting in insufficient surface finish of the part. The front and rear guide plates are evenly tilted to one side of the grinding wheel, resulting in the part being larger in the middle and smaller at both ends. Therefore, the control device parameters are crucial to the preparation of fine grinding rods. Summary of the invention

[0005] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a processing technology for high-precision cemented carbide rods.

[0006] The technical solution of the present invention is as follows:

[0007] A processing technology for high-precision cemented carbide rods, which uses a centerless grinder to grind the original cemented carbide rod at least three times, namely the first grinding, the second grinding and the third grinding. The centerless grinder includes a guide wheel and a grinding wheel that rotate synchronously in different phases. Grinding fluid is used for cooling during grinding. The grinding fluid after grinding enters a filtration system for filtration and recycling.

[0008] As a preferred embodiment of the present invention, in the first grinding, the feed amount is 0.04-0.06 mm, the horizontal angle of the guide wheel is 1-3°, the vertical angle of the guide wheel is 2-3°, the mesh number of the grinding wheel is 80-120, and the guide wheel speed is 80-100 rpm.

[0009] As a preferred embodiment of the present invention, in the second grinding, the feed amount is 0.02-0.03 mm, the horizontal angle of the guide wheel is 2-3°, the vertical angle of the guide wheel is 2-3°, the mesh number of the grinding wheel is 200-400 mesh, and the guide wheel speed is 80-100 rpm.

[0010] As a preferred embodiment of the present invention, in the third grinding, the feed amount is 0.007-0.009 mm, the horizontal angle of the guide wheel is 1-2°, the vertical angle of the guide wheel is 1-3°, the mesh number of the grinding wheel is 600-900 mesh, and the guide wheel speed is 70-80 rpm.

[0011] As a preferred solution of the present invention, the radial runout of the feed of the original cemented carbide rod is controlled within a range of 0.008-0.010 mm.

[0012] As a preferred embodiment of the present invention, the feed taper of the original cemented carbide rod is controlled at 0.008-0.010 mm.

[0013] As a preferred embodiment of the present invention, the feed roundness of the original cemented carbide rod is 0.003-0.007 mm.

[0014] As a preferred embodiment of the present invention, the storage environment temperature of the original cemented carbide rod is 22±2°C.

[0015] As a preferred embodiment of the present invention, the guide wheel and / or grinding wheel contains aluminum powder, and the grinding fluid contains hydroxide ions.

[0016] The beneficial effects of the present invention are as follows: the present invention uses a centerless grinder to grind the bar material in multiple passes, gradually releasing the processing stress in the bar material, and at the same time, through different grinding processes, controlling the grinding amount of the bar material, and controlling the storage temperature of the original bar material to reduce the processing influence caused by the thermal expansion and contraction of the bar material; and combined with the grinding fluid filtration system, reducing the defects of annular thread lines on the surface of the bar material caused by sand particles or cuttings after grinding, thereby producing high-precision cemented carbide bar material. Furthermore, the grinding wheel and / or the guide wheel contain aluminum powder, which reacts with the hydroxide ions in the grinding fluid to produce gas. After the gas is discharged, fine holes are generated in the grinding wheel and the guide wheel, which is conducive to the attachment of chips and grinding fluid, and avoids the chips from sticking to the surface of the grinding wheel and damaging the bar material. DETAILED DESCRIPTION

[0017] The following examples are provided to further illustrate the technical solutions of the present invention.

[0018] The original cemented carbide rods described in the following examples are stored at an ambient temperature of 22±2°C.

[0019] Example 1

[0020] A processing technology for high-precision cemented carbide rods, which uses a centerless grinder to grind the original cemented carbide rod three times, namely the first grinding, the second grinding and the third grinding. The centerless grinder includes a guide wheel and a grinding wheel that rotate synchronously in phase. Grinding fluid is used for cooling during grinding. The grinding fluid after grinding enters a filtration system for filtration and recycling.

[0021] The diameter of the original rod is 5mm, and the incoming material allowance is 0.06mm of cemented carbide rod.

[0022] In the first grinding, the feed amount is 0.04 mm, the horizontal angle of the guide wheel is 2°, the vertical angle of the guide wheel is 2.5°, the grinding wheel mesh is 100 mesh, and the guide wheel speed is 90 rpm.

[0023] In the second grinding, the feed amount is 0.02 mm, the horizontal angle of the guide wheel is 2.5°, the vertical angle of the guide wheel is 2.5°, the mesh number of the grinding wheel is 300 meshes, and the guide wheel speed is 90 rpm.

[0024] In the third grinding, the feed amount is 0.008 mm, the horizontal angle of the guide wheel is 1.5°, the vertical angle of the guide wheel is 2°, the grinding wheel mesh is 800 mesh, and the guide wheel rotation speed is 75 rpm.

[0025] The radial runout of the raw cemented carbide bar feed is controlled at 0.008 mm.

[0026] The feed taper of the original cemented carbide rod is controlled at 0.008 mm.

[0027] The feed roundness of the original cemented carbide rod is 0.005 mm.

[0028] The wear-resistant surfaces of the guide wheel and the grinding wheel contain aluminum powder, and the grinding fluid contains hydroxide ions;

[0029] The wear-resistant surface is prepared by the following steps of mixing, pressing, flat grinding, sandblasting, bonding, curing and finishing of raw materials in parts by weight. The raw materials of the wear-resistant surface are: 30 parts of polyamide resin, 40 parts of polyamide sub-resin, 18 parts of diamond, 20 parts of boron nitride, 65 parts of silicon carbide, 3 parts of polytetrafluoroethylene, 35 parts of cerium oxide and 25 parts of aluminum powder.

[0030] The grinding fluid comprises the following components in parts by weight: 10 parts of dodecenyl succinate half ester, 30 parts of triethanolamine, 10 parts of sodium hydroxide, 20 parts of sodium molybdate and 40 parts of deionized water.

[0031] Example 2

[0032] A processing technology for high-precision cemented carbide rods, which uses a centerless grinder to grind the original cemented carbide rod three times, namely the first grinding, the second grinding and the third grinding. The centerless grinder includes a guide wheel and a grinding wheel that rotate synchronously in phase. Grinding fluid is used for cooling during grinding. The grinding fluid after grinding enters a filtration system for filtration and recycling.

[0033] The diameter of the original rod is 5mm, and the incoming material allowance is 0.06mm of cemented carbide rod.

[0034] In the first grinding, the feed amount is 0.05 mm, the horizontal angle of the guide wheel is 2°, the vertical angle of the guide wheel is 2.5°, the mesh number of the grinding wheel is 100 meshes, and the guide wheel speed is 90 rpm.

[0035] In the second grinding, the feed amount is 0.025 mm, the horizontal angle of the guide wheel is 2.5°, the vertical angle of the guide wheel is 2.5°, the mesh number of the grinding wheel is 300 meshes, and the guide wheel speed is 90 rpm.

[0036] In the third grinding, the feed amount is 0.007 mm, the horizontal angle of the guide wheel is 2°, the vertical angle of the guide wheel is 2.5°, the mesh number of the grinding wheel is 800 meshes, and the guide wheel rotation speed is 75 rpm.

[0037] The radial runout of the raw cemented carbide bar feed is controlled at 0.008 mm.

[0038] The feed taper of the original cemented carbide rod is controlled at 0.008 mm.

[0039] The feed roundness of the original cemented carbide rod is 0.005 mm.

[0040] The wear-resistant surfaces of the guide wheel and the grinding wheel contain aluminum powder, and the grinding fluid contains hydroxide ions;

[0041] The wear-resistant surface is prepared by the following steps of mixing, pressing, flat grinding, sandblasting, bonding, curing and finishing of raw materials in parts by weight. The raw materials of the wear-resistant surface are: 30 parts of polyamide resin, 40 parts of polyamide sub-resin, 18 parts of diamond, 20 parts of boron nitride, 65 parts of silicon carbide, 3 parts of polytetrafluoroethylene, 35 parts of cerium oxide and 25 parts of aluminum powder.

[0042] The grinding fluid comprises the following components in parts by weight: 10 parts of dodecenyl succinate half ester, 30 parts of triethanolamine, 10 parts of sodium hydroxide, 20 parts of sodium molybdate and 40 parts of deionized water.

[0043] Example 3

[0044] A processing technology for high-precision cemented carbide rods, which uses a centerless grinder to grind the original cemented carbide rod three times, namely the first grinding, the second grinding and the third grinding. The centerless grinder includes a guide wheel and a grinding wheel that rotate synchronously in phase. Grinding fluid is used for cooling during grinding. The grinding fluid after grinding enters a filtration system for filtration and recycling.

[0045] The diameter of the original rod is 5mm, and the incoming material allowance is 0.06mm of cemented carbide rod.

[0046] In the first grinding, the feed amount is 0.06 mm, the horizontal angle of the guide wheel is 2°, the vertical angle of the guide wheel is 2.5°, the mesh number of the grinding wheel is 100 meshes, and the guide wheel speed is 90 rpm.

[0047] In the second grinding, the feed amount is 0.03 mm, the horizontal angle of the guide wheel is 2.5°, the vertical angle of the guide wheel is 3°, the grinding wheel mesh is 300 mesh, and the guide wheel speed is 90 rpm.

[0048] In the third grinding, the feed amount is 0.008 mm, the horizontal angle of the guide wheel is 1.5°, the vertical angle of the guide wheel is 2°, the grinding wheel mesh is 800 mesh, and the guide wheel rotation speed is 80 rpm.

[0049] The radial runout of the raw cemented carbide bar feed is controlled at 0.008 mm.

[0050] The feed taper of the original cemented carbide rod is controlled at 0.008 mm.

[0051] The feed roundness of the original cemented carbide rod is 0.005 mm.

[0052] The wear-resistant surfaces of the guide wheel and the grinding wheel contain aluminum powder, and the grinding fluid contains hydroxide ions;

[0053] The wear-resistant surface is prepared by the following steps of mixing, pressing, flat grinding, sandblasting, bonding, curing and finishing of raw materials in parts by weight. The raw materials of the wear-resistant surface are: 30 parts of polyamide resin, 40 parts of polyamide sub-resin, 18 parts of diamond, 20 parts of boron nitride, 65 parts of silicon carbide, 3 parts of polytetrafluoroethylene, 35 parts of cerium oxide and 25 parts of aluminum powder.

[0054] The grinding fluid comprises the following components in parts by weight: 10 parts of dodecenyl succinate half ester, 30 parts of triethanolamine, 10 parts of sodium hydroxide, 20 parts of sodium molybdate and 40 parts of deionized water.

[0055] Example 4

[0056] A processing technology for high-precision cemented carbide rods, which uses a centerless grinder to grind the original cemented carbide rod three times, namely the first grinding, the second grinding and the third grinding. The centerless grinder includes a guide wheel and a grinding wheel that rotate synchronously in phase. Grinding fluid is used for cooling during grinding. The grinding fluid after grinding enters a filtration system for filtration and recycling.

[0057] The diameter of the original rod is 5mm, and the incoming material allowance is 0.06mm of cemented carbide rod.

[0058] In the first grinding, the feed amount is 0.05 mm, the horizontal angle of the guide wheel is 2°, the vertical angle of the guide wheel is 2.5°, the mesh number of the grinding wheel is 100 meshes, and the guide wheel speed is 90 rpm.

[0059] In the second grinding, the feed amount is 0.03 mm, the horizontal angle of the guide wheel is 2.5°, the vertical angle of the guide wheel is 2.5°, the mesh number of the grinding wheel is 400 meshes, and the guide wheel speed is 90 rpm.

[0060] In the third grinding, the feed amount is 0.009 mm, the horizontal angle of the guide wheel is 2°, the vertical angle of the guide wheel is 2°, the mesh number of the grinding wheel is 900 meshes, and the guide wheel rotation speed is 75 rpm.

[0061] The radial runout of the raw cemented carbide bar feed is controlled at 0.008 mm.

[0062] The feed taper of the original cemented carbide rod is controlled at 0.009 mm.

[0063] The feed roundness of the original cemented carbide rod is 0.006 mm.

[0064] The wear-resistant surfaces of the guide wheel and the grinding wheel contain aluminum powder, and the grinding fluid contains hydroxide ions;

[0065] The wear-resistant surface is prepared by the following steps of mixing, pressing, flat grinding, sandblasting, bonding, curing and finishing of raw materials in parts by weight. The raw materials of the wear-resistant surface are: 30 parts of polyamide resin, 40 parts of polyamide sub-resin, 18 parts of diamond, 20 parts of boron nitride, 65 parts of silicon carbide, 3 parts of polytetrafluoroethylene, 35 parts of cerium oxide and 25 parts of aluminum powder.

[0066] The grinding fluid comprises the following components in parts by weight: 10 parts of dodecenyl succinate half ester, 30 parts of triethanolamine, 10 parts of sodium hydroxide, 20 parts of sodium molybdate and 40 parts of deionized water.

[0067] Example 5

[0068] A processing technology for high-precision cemented carbide rods, which uses a centerless grinder to grind the original cemented carbide rod three times, namely the first grinding, the second grinding and the third grinding. The centerless grinder includes a guide wheel and a grinding wheel that rotate synchronously in phase. Grinding fluid is used for cooling during grinding. The grinding fluid after grinding enters a filtration system for filtration and recycling.

[0069] The diameter of the original rod is 5mm, and the incoming material allowance is 0.06mm of cemented carbide rod.

[0070] In the first grinding, the feed amount is 0.05 mm, the horizontal angle of the guide wheel is 2°, the vertical angle of the guide wheel is 3°, the grinding wheel mesh is 100 mesh, and the guide wheel speed is 100 rpm.

[0071] In the second grinding, the feed amount is 0.02 mm, the horizontal angle of the guide wheel is 2.5°, the vertical angle of the guide wheel is 2.5°, the mesh number of the grinding wheel is 400 meshes, and the guide wheel speed is 90 rpm.

[0072] In the third grinding, the feed amount is 0.008 mm, the horizontal angle of the guide wheel is 2°, the vertical angle of the guide wheel is 2°, the mesh number of the grinding wheel is 900 meshes, and the guide wheel rotation speed is 80 rpm.

[0073] The radial runout of the raw cemented carbide bar feed is controlled at 0.008 mm.

[0074] The feed taper of the original cemented carbide rod is controlled at 0.008 mm.

[0075] The feed roundness of the original cemented carbide rod is 0.007 mm.

[0076] The wear-resistant surfaces of the guide wheel and the grinding wheel contain aluminum powder, and the grinding fluid contains hydroxide ions;

[0077] The wear-resistant surface is prepared by the following steps of mixing, pressing, flat grinding, sandblasting, bonding, curing and finishing of raw materials in parts by weight. The raw materials of the wear-resistant surface are: 30 parts of polyamide resin, 40 parts of polyamide sub-resin, 18 parts of diamond, 20 parts of boron nitride, 65 parts of silicon carbide, 3 parts of polytetrafluoroethylene, 35 parts of cerium oxide and 25 parts of aluminum powder.

[0078] The grinding fluid comprises the following components in parts by weight: 10 parts of dodecenyl succinate half ester, 30 parts of triethanolamine, 10 parts of sodium hydroxide, 20 parts of sodium molybdate and 40 parts of deionized water.

[0079] Comparative Example 1 (One-step processing)

[0080] A processing technology for high-precision cemented carbide rods, using a centerless grinder to grind the original cemented carbide rods, the feed amount is 0.02mm, the horizontal angle of the guide wheel is 2.5°, the vertical angle of the guide wheel is 2.5°, the mesh number of the grinding wheel is 300 meshes, and the guide wheel speed is 90rpm. The centerless grinder includes a guide wheel and a grinding wheel that rotate synchronously in phase. Grinding fluid is used for cooling during grinding, and the grinding fluid after grinding enters a filtration system for filtration and recycling.

[0081] The diameter of the original rod is 5mm, and the incoming material allowance is 0.06mm of cemented carbide rod.

[0082] The radial runout of the raw cemented carbide bar feed is controlled at 0.008 mm.

[0083] The feed taper of the original cemented carbide rod is controlled at 0.008 mm.

[0084] The feed roundness of the original cemented carbide rod is 0.005 mm.

[0085] The wear-resistant surfaces of the guide wheel and the grinding wheel contain aluminum powder, and the grinding fluid contains hydroxide ions;

[0086] The wear-resistant surface is prepared by the following steps of mixing, pressing, flat grinding, sandblasting, bonding, curing and finishing of raw materials in parts by weight. The raw materials of the wear-resistant surface are: 30 parts of polyamide resin, 40 parts of polyamide sub-resin, 18 parts of diamond, 20 parts of boron nitride, 65 parts of silicon carbide, 3 parts of polytetrafluoroethylene, 35 parts of cerium oxide and 25 parts of aluminum powder.

[0087] The grinding fluid comprises the following components in parts by weight: 10 parts of dodecenyl succinate half ester, 30 parts of triethanolamine, 10 parts of sodium hydroxide, 20 parts of sodium molybdate and 40 parts of deionized water.

[0088] Comparative Example 2 (without aluminum powder)

[0089] A processing technology for high-precision cemented carbide rods, which uses a centerless grinder to grind the original cemented carbide rod three times, namely the first grinding, the second grinding and the third grinding. The centerless grinder includes a guide wheel and a grinding wheel that rotate synchronously in phase. Grinding fluid is used for cooling during grinding. The grinding fluid after grinding enters a filtration system for filtration and recycling.

[0090] The diameter of the original rod is 5mm, and the incoming material allowance is 0.06mm of cemented carbide rod.

[0091] In the first grinding, the feed amount is 0.04 mm, the horizontal angle of the guide wheel is 2°, the vertical angle of the guide wheel is 2.5°, the grinding wheel mesh is 100 mesh, and the guide wheel speed is 90 rpm.

[0092] In the second grinding, the feed amount is 0.02 mm, the horizontal angle of the guide wheel is 2.5°, the vertical angle of the guide wheel is 2.5°, the mesh number of the grinding wheel is 300 meshes, and the guide wheel speed is 90 rpm.

[0093] In the third grinding, the feed amount is 0.008 mm, the horizontal angle of the guide wheel is 1.5°, the vertical angle of the guide wheel is 2°, the grinding wheel mesh is 800 mesh, and the guide wheel rotation speed is 75 rpm.

[0094] The radial runout of the raw cemented carbide bar feed is controlled at 0.008 mm.

[0095] The feed taper of the original cemented carbide rod is controlled at 0.008 mm.

[0096] The feed roundness of the original cemented carbide rod is 0.005 mm.

[0097] The wear-resistant surfaces of the guide wheel and the grinding wheel contain aluminum powder, and the grinding fluid contains hydroxide ions;

[0098] The wear-resistant surface is prepared by the following steps of mixing, pressing, flat grinding, sandblasting, bonding, curing and finishing of raw materials in parts by weight. The raw materials of the wear-resistant surface are: 30 parts of polyamide resin, 40 parts of polyamide sub-resin, 18 parts of diamond, 20 parts of boron nitride, 65 parts of silicon carbide, 3 parts of polytetrafluoroethylene and 35 parts of cerium oxide.

[0099] The grinding fluid comprises the following components in parts by weight: 10 parts of dodecenyl succinate half ester, 30 parts of triethanolamine, 10 parts of sodium hydroxide, 20 parts of sodium molybdate and 40 parts of deionized water.

[0100] The radial runout tester was used to test the radial runout performance of the above-mentioned embodiment and comparative example, and the test results are shown in the following table. (Radial runout is used to detect shaft deviation, and to check the roundness of a certain point on the shaft and the deviation of that point on the shaft from the reference line.)

[0101]

[0102]

[0103] It can be seen from the table above that the radial runout of the embodiment is smaller than that of the comparative example. The possible reasons are as follows: from the analysis of the comparative example, it can be seen that in the embodiment, the machining stress in the bar is gradually released after multiple grinding processes. At the same time, the grinding amount of the bar is controlled by different grinding processes, and the grinding fluid filtration system is combined to reduce the defects of the ring thread line on the surface of the bar caused by sand or cuttings after grinding, thereby producing a high-precision cemented carbide bar. From the analysis of comparative example 2, it can be seen that the wear-resistant surface of the grinding wheel and the guide wheel contains aluminum powder, which reacts with the hydroxide ions in the grinding fluid to produce gas. After the gas is discharged, fine holes are generated in the grinding wheel and / or the guide wheel, which is conducive to the attachment of chips and grinding fluid, and avoids the chips from sticking to the surface of the grinding wheel to damage the bar, thereby reducing the surface defects of the bar and improving its precision.

[0104] Under the premise that no conflict occurs, those skilled in the art may freely combine and superimpose the above-mentioned additional technical features.

[0105] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the protection scope of the present invention.

Claims

1. A high-precision cemented carbide bar processing technology, characterized in that: The original carbide rod is ground three times by a centerless grinder, which are the first grinding, the second grinding and the third grinding. The centerless grinder includes a guide wheel and a grinding wheel that rotate synchronously in different phases. The grinding fluid is used for cooling during the grinding. The grinding fluid after grinding enters a filtering system for filtration and recycling. The original rod has a diameter of 5 mm and the incoming excess is 0.06 mm of cemented carbide rod; In the first grinding, the feed amount is 0.04 mm, the horizontal angle of the guide wheel is 2°, the vertical angle of the guide wheel is 2.5°, the grinding wheel mesh is 100 mesh, and the guide wheel speed is 90 rpm; In the second grinding, the feed amount is 0.02 mm, the horizontal angle of the guide wheel is 2.5°, the vertical angle of the guide wheel is 2.5°, the grinding wheel mesh is 300 mesh, and the guide wheel speed is 90 rpm; In the third grinding, the feed amount is 0.008 mm, the horizontal angle of the guide wheel is 1.5°, the vertical angle of the guide wheel is 2°, the grinding wheel mesh is 800 mesh, and the guide wheel speed is 75 rpm; The radial runout of the feed of the original cemented carbide bar is controlled at 0.008 mm; The feed taper of the original cemented carbide rod is controlled at 0.008 mm; The feed roundness of the original cemented carbide rod is 0.005 mm; The wear-resistant surfaces of the guide wheel and the grinding wheel contain aluminum powder, and the grinding fluid contains hydroxide ions; The wear-resistant surface is prepared by the following weight parts of raw materials mixing, pressing, flat grinding, sandblasting, bonding, curing and finishing treatment processes. The raw materials of the wear-resistant surface are: 30 parts of polyamide resin, 40 parts of polyamide resin, 18 parts of diamond, 20 parts of boron nitride, 65 parts of silicon carbide, 3 parts of polytetrafluoroethylene, 35 parts of cerium oxide, and 25 parts of aluminum powder; The grinding fluid comprises the following components in parts by weight: 10 parts of dodecenyl succinate half ester, 30 parts of triethanolamine, 10 parts of sodium hydroxide, 20 parts of sodium molybdate, and 40 parts of deionized water; The storage environment temperature of the original cemented carbide rod is 22±2°C.

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