the workpiece material to be ground, grinding efficiency and surface quality

Wheel selection was excellent, easy to fall off blunt abrasive, grinding wheel easy to plug, grinding heat increases, the workpiece easily burn, grinding efficiency is low, affecting the surface abrasive sanding belt  quality; wheel selected too soft, abrasive when he was still sharp fall , increasing the grinding loss, easy to lose the correct geometry, the impact accuracy of the workpiece. Therefore, the choice should be appropriate grinding wheel hardness, but also according to the grinding wheel and workpiece size, shape of the workpiece, grinding way, cooling, grinding wheel binder type and other factors to consider.
 Wheel hardness selection principle for the following reference:
 a. grinding of soft materials to  standard abrasives choose harder grinding wheel, grinding hard materials will have to choose soft grinding wheel;
 b. grinding soft and toughness of non-ferrous metals, the hardness to be elected was softer;
 c. grinding material of poor thermal conductivity should be selected softer wheel;
d. than the circumference roloc disc  of end mill grinding, the grinding wheel hardness should choose softer;
 e. the same grinding conditions, with resin bonded grinding wheel vitrified wheel than the hardness of 1-2 small higher grade;
f. grinding wheel rotational speed is high, the hardness of the optional soft wheel 1 to 2 small stage;
 g. the cooling liquid than dry grinding the grinding wheel hardness grade 1 to 2 hours.