ABSTRACT
CONTENTS 15.1 Introduction ............................................................................................. 301 15.2 Experimental Method ............................................................................ 303 15.3 Experimental Result and Discussion................................................... 304
15.3.1 Wear Mode of Abrasive-Grinding Wheel ............................ 304 15.3.2 Wear Property of Sapphire Pin .............................................. 305 15.3.3 Friction Property....................................................................... 305 15.3.4 Wear Property ........................................................................... 307
15.4 Consideration for ELID-Grinding from the Viewpoint of Tribology ............................................................................................. 307
15.5 Conclusions.............................................................................................. 311 References ........................................................................................................... 312
The purpose of this chapter is to present the wear properties of an ELIDgrinding wheel based on an in-process observation using a CCD microscope tribosystem. The normal load is changed from 0.049 to 9.8 N. It was noticed that when the surface of the grinding wheel is not covered with an oxide film, powder formation or plowing is observed. The measured wear rate for powder formation or plowing spreads from 9.6 108 to 5.5 107 mm3=mm. When the surface of the grinding wheel is covered with an oxide film, flake formation is observed. The wear rate of flake formation is distributed, in this case, between 6.7 106 and 2.7 105 mm3=mm. During the initial friction stage, the friction coefficient in the presence of an oxide film has a higher value than that without an oxide film. This is because of the fact
that the wear is higher at initial friction stage than that without an oxide film. The friction coefficient at the final friction stage decreases as contact pressure increases.
