Hard and brittle material removal mechanism

Hard and brittle material processing is mainly grinding with diamond 7'' cut off disc for metal: There are a lot of researches on the mechanism of hard and brittle material removal. Although the research is not deep and mature: there is roughly the following consensus: the mechanism of removal of hard and brittle materials and metal materials is Great difference: metal material to delay

The removal of hard and brittle materials is accompanied by ductile shear and brittle fracture, and the ductile domain is small and the implementation conditions are harsh: it is difficult to maintain the long-term stability of the grinding wheel under normal conditions. And nano-scale micro-feeding, processing

There is no efficiency at all. The hard and brittle material processing process is mainly accompanied by friction, extrusion and scratching: as the internal stress increases, the number of microcracks increases and is staggered, causing crack propagation, chipping and spalling of the material.

At the same time: a large number of grinding tests have also confirmed that the hard and brittle material has very low tensile strength, the grinding debris is short and small, and the grinding force fluctuates greatly: the grinding force ratio (normal force/tangential force) is large: general metal material grinding The force ratio is between 2 and 3: the hard and brittle material has a grinding force ratio in the range of 5 to 15. This further explains: sand It is difficult for the surface of the wheel to cut into the surface of the hard and brittle workpiece, which is easy to produce high grinding resistance, friction heat and high energy consumption.