製材用CADシステムの開発 : 第2報,丸太材から角材を製材する際の製材部位の決定法

概要

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In this paper, we propose a method for determining the cutting position from the dimension of the external shape and the distribution of knots in a piece of timber measured by the image processing unit to get a square bar (2m~3m long) of superior quality. The quality of a square bar is evaluated from the number and size of knots, and the distance between consecutive knots on each side, and the condition of edge lines. The cutting position is determined as follows. The length of the diagonal line of the square is the minimum diameter at the cut end of a timber. The sap side where the minimum number of knots are distributed is located in the place where the angle between consecutive knots is maximum. The right and left side of a square bar are required to satisfy the conditions that the both edges of the side are straight and conditinuous, and do'nt cross any knot.
一般社団法人日本機械学会の論文
1988-06-25