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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Education > Bulletin > Science bulletin of the Faculty of Education, Nagasaki University > No. 45 >

木材のThick-Slicingにおけるプレッシャバーの影響 : 工具に働く切削力および摩擦係数の変化に及ぼすプレッシャバーの形状と二次圧縮作用位置の影響

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Title: 木材のThick-Slicingにおけるプレッシャバーの影響 : 工具に働く切削力および摩擦係数の変化に及ぼすプレッシャバーの形状と二次圧縮作用位置の影響
Other Titles: Effects of Diameter, Rolling Type, and Setting Condition of the Roller Bar upon the Cutting Force and the Frictional Coefficient Acting on the Tool Rake- Face in Orthogonal Thick-Slicing of Wood
Authors: 杉山, 滋
Authors (alternative): Sugiyama, Shigeru
Issue Date: 31-May-1991
Publisher: 長崎大学教育学部
Citation: 長崎大学教育学部自然科学研究報告. vol.45, p.111-134; 1991
Abstract: In the veneer cutting process, compression and restraint caused by a pressure bar play an important role, but few studies have dealt with the effects of them on the frictional coefficient on the tool rake-face. Therefor, the main purpose of this report is to obtain quantitative information on these aspects. In this study, the roller bars with various diameters (D) and various rolling types were prepared to vary the depth (rt) of restraint caused between the face of the roller bar and the tool rake-face, the acting area of reatraint, and the degree of adhesion caused between the face of the roller bar and the tight side of the veneer. Before cutting, the test specimens were preheated in water at about 95℃ for 4 hours. Ten-millimeter-thick veneer of white seraya were cut with five rolling types of the roller bars, and the horzontal (Fh(k)) and vertical (Fv(k)) components of the cutting force (R(K)) were measured. And the frictional (F) and normal (N) forces acting on the tool and the resultant force (R(k)) were calculated. Based on these measurements, the frictional coefficient (μ) on the rake face was calculated from Eq. (12), and its variation under various experimental conditions was clarified. The main results obtained are summarized as follows: (1) The values of F and N increase with increases in not only the depth (⊿rt) of infinitesimal change of restraint but also D (Figs. 16 and 17). (2) The value of μdecreases with increases in ⊿rt, but the decreasing tendency of μ varies under various conbinations of rolling types and diameters (D) of the roller bars (Fig. 18). (3) The value of μ is the largest when cutting with a RF-type roller bar, but is the smallest when cutting with a RR-type roller bar (Fig.19). (4) The value of μ increases with decreases in D, but the increasing tendency of μ varies under various rolling types of the roller bars (Figs. 20 and 21).
URI: http://hdl.handle.net/10069/32318
ISSN: 0386443X
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:No. 45

Citable URI : http://hdl.handle.net/10069/32318

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