Why PCD tools blackening when vitrified bond wheel grinding

Cause analysis of grinding wheel blackening when grinding PCD tool with vitrified diamond Wheel 1 Grinding wheel Blockage After grinding a large number of workpiece, the grinding wheel turned black, indicating that the debris during grinding did not fall off in time and adhered to the grinding wheel surface. As a result, the surface of the grinding wheel may become clogged with debris. At this time, it is necessary to use a whetstone or dressing wheel to grind the diamond grinding wheel. 2 The temperature of the grinding wheel is too high In the grinding process, the coolant is used less and the grinding heat increases. At this time, it is necessary to increase the amount of coolant to reduce the temperature of grinding wheel and workpiece. 3 The feed quantity is too large When the grinding wheel feed is large, the cutting thickness of a single abrasive grain increases, and the heat generated increases, so that the grinding temperature rises, and the grinding wheel becomes black. The grinding wheel feed needs to be properly reduced. 4 The grinding wheel is too hard Grinding wheel selection is too hard, blunt abrasive particles are not easy to fall off. The workpiece material is PCD. The harder the workpiece material is, the softer the grinding wheel should be selected to make the dull grinding grains fall off quickly, so that the grinding wheel always keeps sharp grinding grains when working Cause analysis of grinding wheel blackening when grinding PCD tool with vitrified diamond Wheel

1 Grinding wheel Blockage After grinding a large number of workpiece, the grinding wheel turned black, indicating that the debris during grinding did not fall off in time and adhered to the grinding wheel surface. As a result, the surface of the grinding wheel may become clogged with debris. At this time, it is necessary to use a whetstone or dressing wheel to grind the diamond grinding wheel.
2 The temperature of the grinding wheel is too high In the grinding process, the coolant is used less and the grinding heat increases. At this time, it is necessary to increase the amount of coolant to reduce the temperature of grinding wheel and workpiece.
3 The feed quantity is too large When the grinding wheel feed is large, the cutting thickness of a single abrasive grain increases, and the heat generated increases, so that the grinding temperature rises, and the grinding wheel becomes black. The grinding wheel feed needs to be properly reduced.
4 The grinding wheel is too hard Grinding wheel selection is too hard, blunt abrasive particles are not easy to fall off. The workpiece material is PCD. The harder the workpiece material is, the softer the grinding wheel should be selected to make the dull grinding grains fall off quickly, so that the grinding wheel always keeps sharp grinding grains when working Avoid workpiece burn and debris clogging grinding wheel.
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