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縦突き切削におけるプレッシャーバーの効果 : 単板性状,切削抵抗の変化

By 智 大矢, 正光 太田 and 健 岡野

Abstract

縦切削におけるプレッシャーバーの効果について,主に繊維傾斜角0°の試験体を用いて基礎的実験を行った。その結果を要約すると,以下の通りである。1)繊維傾斜角0°では,単板品質から考えた場合,バーの最適設定条件は母材から垂直方向に切込み量とほぼ等しい量離しながら,刃先から水平方向に切込み量の1~3倍程度離した場合であった。また,この設定条件は被削性の点からも好ましかった。2)1)で述べたバーの最適設定条件は,バーと切り屑がわずかに接触する場合であった。3)単板性状はバーの設定条件に影響されるとともに,わずかな繊維傾斜角の変化にも影響された。従って,良好な単板を得るためには試験体の繊維方向を厳密に知る必要がある。To produce a good quality veneer from softwood for Laminated Veneer Lumber, it seems that slicing along the grain is more advantageous than rotary cutting, because of the inhomogeneity of the softwood. In this report, slicing along the grain was performed to obtain fundamental knowledge on the effects of the setting of the pressure bar on the veneer properties and machinability. The results obtained are summarized as follows: 1) To obtain a good veneer, which has large curl radius and small thickess variation, the pressure bar must be set at the points where the extreme point of the bar has a vertical distance equal to the depth of the cut (t) from the specimen's surface and a horizontal distance ranging from t to 3t from the tool edge. 2) In the cases that veneer chip was pushed down a little by the bar, the veneer properties and machinability were expected to be good. 3) The properties of veneer were influenced by the setting of the bar, but more sensitively influenced by the variation of the grain angle

Topics: 縦切削, プレッシャーバー, カール半径, 厚さむら, 繊維傾斜角, Slicing along the grain, Pressure bar, Radius of curl, Thickness variation, Grain angle, 610
Publisher: Department of Forest Products, Faculty of Agriculture, The University of Tokyo
Year: 1991
OAI identifier: oai:repository.dl.itc.u-tokyo.ac.jp:2261/23197
Provided by: UT Repository
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