Cylindrical grinder is very common in mold factory and hardware processing factory, and has become a common equipment for mechanical industry technicians. In the operation of cylindrical grinder, the choice of abrasive is very important.
1. Selection of abrasive for cylindrical grinder
Corundum fast 9'' grinding wheels are used for hardened or non-hardened steel rolls, while silicon carbide grinding wheels are used for chilled cast iron rolls, rubber rolls, copper rolls and granite rolls. Corresponding corundum grinding wheels should be selected for different steel rolls to obtain higher grinding accuracy and surface quality. For example, chromium corundum (PA) grinding wheel is used for alloy steel rolls, zirconium corundum (ZA) 230*6*22mm grinding wheel for stainless steel is used for heat-resistant alloy steel rolls, and single crystal corundum (SA) is used for stainless steel rolls.
2. Selection of grinding wheel made in China size for cylindrical grinder
Coarse grinding (24-60) grinding wheels are selected for coarse grinding, fine grinding (60-100) grinding wheels for fine grinding, 150 grinding wheels for precision grinding, and fine grinding (W63-W14) wheels are generally used for super-precision grinding or mirror grinding.
3. grinding wheel hardness selection of cylindrical grinder
The harder the grinding roller is, the softer the hardness of the 230*6*22mm grinding wheel for stainless steel should be.
(1) If the 230*6*22mm grinding wheel for stainless steel wears out too fast, it indicates that the grinding wheel selected for the rolls of a particular processing is too soft, the following improvement measures can be taken:
A. increase the linear speed of the grinding wheel made in China.
B. Increase the longitudinal feed rate of the trailer, that is, the longitudinal feed of the workpiece per turning Trailer increases to 2/3~3/4 of the width of the fast 9'' grinding wheel.
C. reduces roll speed.
If the above measures are not taken, the obvious grinding effect has not been achieved, indicating that the grinding wheel is too soft and not applicable, and a harder grinding wheel should be selected.
(2) if grinding wheel is obviously obstructed (Chi Li) or dirty, the passivation sand is not easy to fall off, the wheel is easy to adhere to the grinding debris, and the surface of the roller is burnt and scuffed.
A. reduces wheel speed;
B. increase roller speed.
If the above measures have not yet achieved obvious grinding effect, indicating that the grinding wheel is too hard, should choose a bit softer grinding wheel.
4. Selection of grinding wheel binder for cylindrical grinder
Besides resin bonded grinding wheels, ceramic fast 9'' grinding wheels are preferred for roller surface grinding.
