红松水曲柳木材密度与切削阻力关系的研究

本文继前一报告之后,对红松、水曲柳木材密度与切削阻力的关系做了进一步的研究。主要的结果是:(1)木材密度与切削阻力的关系因树种、切削方向、切削厚度、刀具前角和木材含水率之不同而有差异;(2)切削厚度、刀具前角和木材含水率对密度与切削阻力关系的影响有统一的趋势,而且此趋势可用简单的线性关系表述;(3)木材中密度以外的影响切削阻力因素的分布状况,从株内较大范围看,半径和树高方向不同部位间均未表现出显著差异。

STUDIES ON THE RELATIONSHIP BETWEEN WOOD DENSITY AND CUTTING RESISTANCE WITH KOREAN PINE AND MANCHURIAN ASH

Wood density makes important effect on cutting resistance. Following the former report, we have studied the relationship between wood density and cutting resistance with Korean pine and Manchurian ash. The main results are as follows: 1) The relationship between wood density and cutting resistance varied with wood species, cutting direction, chip thickness, knife rake angle and moisture content of wood. 2) There existed a common tendency of the effects of chip thickness, knife rake angle and moisture content of wood on the relationship between wood density and cutting resistance and such tendency could be described with a simple linear equation. 3) The scatter of the data on the density-cutting resistance relation implies that besides density there exsit some other factors affecting cutting resistance. An analysis showed that being observed in a relatively wide scope, no significant difference of the distribution of such factors was shown both in the directions of height and diameter within a tree.