An abrasive tool for grinding a flat plate; an abrasive
Abrasives are made from abrasives and grinding fluids.According to the particle size of abrasive particle size is divided into 41, one class from 4# to 240# powder is 27, the greater the number of abrasive particle size, the more fine powder; from W63 to W0.5 a total of 14 species, the greater the number is more coarse, abrasive. In grinding, it should be selected according to the precision and surface roughness required by the workpiece.Grinding fluid in the processing of harmonic, grinding, cooling and lubrication role, commonly used kerosene, gasoline, N15 or N32 number oil, industrial glycerin, turbine oil and cooked lard. In addition, according to the need, in the grinding fluid to add a proper amount of paraffin, beeswax and other fillers and larger viscosity and strong oxidation of oleic acid, fatty acids, stearic acid and so on, the effect is better.
The surface hardness of the tool should be slightly lower than that of the workpiece to be studied. In this way, tiny abrasive particles in the abrasive can be easily inserted into the surface of the grinding machine to make micro cutting of the workpiece surface. On the other hand, the abrasive particles will insert into the surface of the parts, and grinding will cause the cutting tools to be cut. But the tools should not be too soft. Otherwise, the abrasive will be embedded into the lost abrasive lapping tool. The microstructure of the material should be fine and uniform, with better wear resistance, so as to ensure the higher size, shape accuracy and fine surface roughness of the parts to be researched. A grey cast iron, with commonly used materials of nodular cast iron, mild steel, copper can be used, Babbitt and lead after two, mainly used for precision grinding of bearing or soft parts made of polished copper alloy.
With the grinding tools and abrasive grinding on the workpiece surface with a layer of trace metals, the surface of the workpiece to achieve the precise size, accurate geometry and surface roughness is very fine, this processing method called grinding.
