Abstract
In the research, wheel wear rate B and actual metal removal rate Ztp were measured over a wide range of theoretical metal removal rate Zth. By using the results, the grinding ratio GB and the Ztp in high-depth of cut grinding have been investigated mainly. The conclusions obtained are as follows : (1) At the Zth within a critical theoretical metal removal rate (Zth) cr, the grain fracture is related to the B. At the Zth the Band the GB do not show large variation for varying Zth. And, the Ztp is regarded as being approximately equal to the Zth. (2) At the Zth over the (Zth) cr, the bond fracture is related to the B. From the (Zth) cr, the B and the GB begins to increase and decrease steeply with the increase of Zth. And, the Ztp begins to become outstandingly smaller than the Zth (3) The (Zth) cr, becomes larger for wheels of coarser grain and harder grade. Grain type in wheel influences the value of the (Zth) cr. (4) The Zth, from which Ztp does not increase with the increase of Zth, exists. (5) The sum of machining cost and wheel cost shows the minimum at a Zth near the (Zth)cr.
