石炭・岩石類の切削機構について (第1報)
解析的考察
1965 年 81 巻 932 号 p. 1039-1044
詳細
1965 年 81 巻 932 号 p. 1039-1044
The cutting mechanism is classified into three types, i. e.(1) flow type, (2) shear type, and (3) crack type.
It is assumed that fracture stress is shear in the former two types, and fracture stress is tensile in the last type.
I. EVANS discussed on the crack type cutting mechanism in his analytical reports.
On the shear type cutting mechanism, the analytical considerations by M. E. MERCHANT are well known in metal cutting.
In this report, the authors present a generalized formula for the crack type cutting mechanism, under some assumptions simillar to I.EVANS'S; and a new formula for the shear type cutting mechanism in the cutting process of brittle materials, modifying MERCHANT'S theory and depending on an extended GRIFFITH'S theory presented by McCLINTOCK.
Then depending on these formulae and some analytical considerations, the transient range of the shear and crack type cutting mechanisms is. determined.
