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在纵向（９０－０）木材切削过程中，经常会遇到两种不同的切削情况：径向切削和弦向切削。本文主要研究两种切削情况的切削力和切屑变形的差异。所选用的试材为挪威常用的５种木材：松木，云杉，桦木，杨木和栎木。试验表明，两种情况下的切屑变形和破坏程度及切削力存在差异。径向切削情况下的切削力波动较大，切屑破坏较大。切削力的峰值随着切削厚度增加而增大，但栎木增大幅度大于其它４种试材。
In the vertical (90-0) wood cutting process, often encounter two different cutting conditions: radial cutting and chord cutting. This paper mainly studies the difference of cutting force and chip deformation in two kinds of cutting conditions. The selected test material is five kinds of wood commonly used in Norway: pine, spruce, birch, poplar and oak. Tests show that there are differences between the chip deformation and the extent of damage and the cutting forces in both cases. The cutting force under radial cutting fluctuates greatly and the chips destroy more. The peak of cutting force increases with the increase of cutting thickness, but the increase of oak is bigger than the other four kinds of test materials.