Diamond composite sheet (PDC) is a superhard tool material developed in the 1970s. The tool made of it is used to cut a variety of non-ferrous metals and non-metals, and can be used to cut the grinding wheel. When cutting the grinding wheel with it, it has the following characteristics:
(1) It has high hardness and wear resistance: the hardness of polycrystalline diamond layer is generally HV7000～9000, and it is consistent in all directions, which is 2~4 times of the hardness of general grinding wheel abrasive. The cutting wheel is highly durable and has a volumetric wear ratio of up to 1/13 million. The mass wear ratio can reach 1/300,000, which reduces production costs.
(2) High flexural strength: The flexural strength of diamond is 210-490 MPa, while the composite layer of PDC insert has thicker carbide bearing with higher flexural strength, and its composite flexural strength can reach 1500 MPa, so no chipping or breaking occurs during the cutting process.
(3) The grinding wheel is easy to collapse when cutting in and out: When cutting the grinding wheel with a tool with a large main angle, the cutting edge is easy to collapse. In order to solve this problem, a circular blade is used to change the main yaw angle, so that the cutting and cutting are smooth. When the feed amount is 1 to 1.5 mm, no chipping occurs.
(4) The chips are in powder form: the chips of the cutting wheel are powdery, and the tool wears in the form of flank wear, which mainly bears the wear of the grinding wheel abrasive.
(5) Cutting force and cutting temperature are low: the diamond composite sheet has a high thermal conductivity, 1.5 to 9 times that of the cemented carbide, and 2 to 6 times that of the copper, so that the temperature in the cutting zone is quickly transmitted. Therefore, the temperature of cutting a resin bond or a ceramic bond wheel with a diamond compact tool is many times lower than that of a cut metal.
(6) Compared with the traditional turning tools, the diamond composite sheet has almost no dust flying during the turning process, the noise is effectively reduced, and the working environment is further improved, which is beneficial to the physical and mental health of the employees.
(1) It has high hardness and wear resistance: the hardness of polycrystalline diamond layer is generally HV7000～9000, and it is consistent in all directions, which is 2~4 times of the hardness of general grinding wheel abrasive. The cutting wheel is highly durable and has a volumetric wear ratio of up to 1/13 million. The mass wear ratio can reach 1/300,000, which reduces production costs.
(2) High flexural strength: The flexural strength of diamond is 210-490 MPa, while the composite layer of PDC insert has thicker carbide bearing with higher flexural strength, and its composite flexural strength can reach 1500 MPa, so no chipping or breaking occurs during the cutting process.
(3) The grinding wheel is easy to collapse when cutting in and out: When cutting the grinding wheel with a tool with a large main angle, the cutting edge is easy to collapse. In order to solve this problem, a circular blade is used to change the main yaw angle, so that the cutting and cutting are smooth. When the feed amount is 1 to 1.5 mm, no chipping occurs.
(4) The chips are in powder form: the chips of the cutting wheel are powdery, and the tool wears in the form of flank wear, which mainly bears the wear of the grinding wheel abrasive.
(5) Cutting force and cutting temperature are low: the diamond composite sheet has a high thermal conductivity, 1.5 to 9 times that of the cemented carbide, and 2 to 6 times that of the copper, so that the temperature in the cutting zone is quickly transmitted. Therefore, the temperature of cutting a resin bond or a ceramic bond wheel with a diamond compact tool is many times lower than that of a cut metal.
(6) Compared with the traditional turning tools, the diamond composite sheet has almost no dust flying during the turning process, the noise is effectively reduced, and the working environment is further improved, which is beneficial to the physical and mental health of the employees.
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