Effects of Inclination Angle upon Deformation of Chip and Roughness of Workpiece Cutting-Surface in Oblique Cutting of Wood Parallel to the Grain

摘要

This report clarifies the effects of the inclination angle (i) of the tool and the grain angle (φ1) of the workpiece upon the components and the resultants of the cutting force in the oblique cutting of wood parallel to the grain. Airdried specimens of sugi (Cryptomeria japonica D. DON), hinoki (Chamaecyparis obtusa ENDL.), and hemlock (Tsuga heterophylla SARG.) were used in this study, and were cut by feeding a tool, which was set on the same experimental apparatus equipped with a three-dimensional elastic-ring dynamometer as used in the previous reports 3),4). The lateral (Fx), main (Fy), and thrust (Fz) components of the cutting force acting on the tool were measured. Using the measured components mensioned above, the resultants (R and Ro) were calculated. In addition to the measurements of the components and the resultants, the deformation of the chip and the roughness of the workpiece cutting-surface were observed and measured. And the effects of the cutting conditions (i and the depth of cut (tn)) and the workpiece conditions (the wood species and φ1) upon them are discussed.