The abrasive wheel is a grinding cutting tool that consists of a number of small, hard abrasive particles and a bonding agent. The abrasive particles are directly responsible for the cutting work and must be sharp and have high hardness, heat resistance and certain toughness. Alumina abrasives are high hardness and good toughness and are suitable for grinding steel. Silicon carbide abrasives are harder, sharper, and have better thermal conductivity, but are brittle and suitable for grinding Cast iron and hard alloys.
The coarse abrasive grains are used for rough grinding, the fine abrasive grains are suitable for fine grinding, the coarser the abrasive is, And the smaller the grain size is.
The middle binder to bond the abrasive. Ceramic binders are commonly used, followed by resin binders. different binder materials affect the corrosion resistance, strength, heat resistance and toughness of the durable cutting off wheel.
The harder the abrasive grain bond is, the less likely it is to fall off the grinding wheel, the hardness of the grinding wheel, that is, the hardness of the grinding wheel, the to the difficulty of the abrasive grains on the surface of the The hardening of the grinding wheel and the hardness of the abrasive are two different concepts. The surface of the workpiece to be ground Is soft, and the edge (edge) of the abrasive grain is not easy to wear, so that the abrasive grain can be used for a longer period of time, that is, the grinding wheel (harder wheel with higher hardness) can be Conversely, a grinding wheel with a low hardness is suitable for grinding workpieces with high hardness.
In order to ensure safety, it should be inspected before installation, and there should be nospect such before cracks. In order to make the grinding wheel work smoothly, the dynamic balance test should be carried out Before use.
After the grinding wheel has been working for a certain period of time, the surface gap will be blocked by the grinding debris, the sharp angle of the abrasive will be blunt, and the original geometry will be distorted. It must therefore be trimmed to restore Cutting power and the correct geometry. The high performance cutting disc needs to be trimmed with a diamond pen.
Surface grinder structure and grinding motion
There are many types of grinding machines, including surface grinders, cylindrical grinders, internal grinders, universal cylindrical grinders (also grind inner holes), gear grinders, thread grinders, guide grinders, centerless grinders (grinding circles) and tool grinders ( Grinding tools) And so on.