木材切削工具の切れ味測定と切れ味評価(XXV) : 木材切削における切削現象の変化に及ぼす切削速度の影響(東幹夫・尾崎洋二教授退官記念)

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Cutting tests of wood with the grain were made to obtain fundamental data on the effects of cutting velocity on chip formation, cutting force, and frictional coefficient by the use of an experimental apparatus designed for cutting tests (Fig. 1) . The range of cutting velocity (V) employed in these tests were from 0.0023 to 52.53 m/sec. The depth of cut (feed of tool per revolution of a steel disk) was varid from 0.3 to 0.7 mm by varing the speed of the feed carriage in combination with two variable-speed motors and some pulleys (Fig. 1). The main results obtained were : (1) The type of chip formation, the curvature of the chip (ρ), and the checks occurring in the chip, change with V (Figs. 5～9). (2) Although the cutting-force components change remarkably with V, the degree of their changes depends not only on the cutting conditions but also on the workpiece conditions. For instance, in the range of very - low cutting - velocity, below about 10 m/sec, the horizontal component (F_H) and the frictional force (F) of the cutting force, when cutting with air - dried workpieces, decrease remarkably with increases in V. In the range of V of about 10～30 m/sec, these components are not affected by V. In the range of V of about 30～53 m/sec, these components decrease gradually with increases in V. Compared with these, the vertical component (F_V) and the normal force (N) of the cutting force change slightly or vary little with V (Figs. 8 and 9). (3) The frictional coefficient (μ), when cutting with water - saturated workpieces, is lower in comparison with that when cutting with air - dried workpieces, and μ, when cutting not only with water - saturated workpieces but also with air - dried workpieces, decreases with increases in V (Fig. 10).
長崎大学の論文
2004-03-26

木材切削工具の切れ味測定と切れ味評価(XXV) : 木材切削における切削現象の変化に及ぼす切削速度の影響(東幹夫・尾崎洋二教授退官記念)

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木材切削工具の切れ味測定と切れ味評価(XXV) : 木材切削における切削現象の変化に及ぼす切削速度の影響(東 幹夫・尾崎 洋二教授退官記念)

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木材切削工具の切れ味測定と切れ味評価(XXV) : 木材切削における切削現象の変化に及ぼす切削速度の影響(東幹夫・尾崎洋二教授退官記念)