Optimum Rake Angle Related to Selected Strength Properties of Wood

A technique for approximating rake angle from a relation between rake angle and cutting coefficient is described, The cutting coefficient of friction, calculated from orthogonal cutting tool force components, was correlated to selected strength properties of sugar pine, white ash, and yellow birch at 1.5 percent, 8,0 percent, and saturated MC conditions. Because previous results show that the cutting coefficient of friction is independent of rake angle and depth of cut, an optimum rake angle could be approximated when the normal tool-force component was assumed to zero. Thus, the cutting coefficient of friction could be equated to rake angle, and the rake angle could be related to selected strength properties.

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