Abstract
Loading behaviour of the grinding wheel is investigated based on working surface topography. For on-machine measurement of working surface profile, the laser micrometer is directly fitted on the wheel head of CNC surface grinder. Mild steel (S 15 C) easy to load is ground with an aluminum oxide grinding wheel (WA 60 J 7 V). From the comparison of profile and micro-observation of working surface, the following results are obtained : There are two types of loading ; deposition type loading is caused by the chip deposited in the chip pocket and welding type loading is caused by the chip welded on the cutting edge. With the progress of loading, the relative frequency distribution of working surface profile which we newly proposed shows changes in its pattern; firstly whole of the distribution shifts to the plus direction of the amplitude, and secondly the relative frequency of the higher region of the amplitude increases. The shift of the distribution corresponds to the progression of deposition type loading and the profile change of the distribution corresponds to the progression of welding type loading. These changes are distinctive, then qualitative evaluation of the loading is possible.
