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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Education > Bulletin > Bulletin of Faculty of Education, Nagasaki University. Natural science > No. 74 >

単板切削現象の変化に及ぼすプレッシャバー-ナイフ-被削材相互の位置関係の影響(解析と実験)(XI) : 工具すくい面の摩擦係数の変化に及ぼすローラバーの回転方式と二次圧縮作用量・作用範囲の影響(2)


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Title: 単板切削現象の変化に及ぼすプレッシャバー-ナイフ-被削材相互の位置関係の影響(解析と実験)(XI) : 工具すくい面の摩擦係数の変化に及ぼすローラバーの回転方式と二次圧縮作用量・作用範囲の影響(2)
Other Titles: Effects of Shape and Setting of the Pressure Bar upon the Cutting Phenomena in the Orthogonal Cutting of Veneer (XI) : Effects of Rolling Type, Diameter and Setting Conditions of the Roller Bar upon Frictional Coefficient on the Tool Rake-Face (2)
Authors: 杉山, 滋
Authors (alternative): Sugiyama, Shigeru
Issue Date: 1-Mar-2006
Citation: 長崎大学教育学部紀要. 自然科学 2006; v.74, 33-39
Abstract: In the veneer cutting process, compression and restraint caused by the pressure bar play an important role, but few studies have dealt with their effects on the frictional coefficient on the tool rake-face. Therefore, the main purpose of the study reported here was to obtain a quantitative information on these aspects. In this study, the roller bars with various diameters (D) and of various rolling types were prepared to vary depth (γ_t) of restraint by interface between face of the roller bar and the tool rake-face, action area of restraint, and degree of adhesion between face of the roller bar and tight side of veneer. Before cutting, test specimens were preheated in water at about 95℃ for 4 hours. White seraya (Parashorea sp.) veneer, 10mm thick, was cut with five rolling types of the roller bars, and frictional (F) and normal (N) forces acting on the tool were measured. Based on these measurements, the frictional coefficient (μ) on the rake face was calculated from Eqs. (17)~(19), and its variation under various experimental conditions was determined. The main results obtained are summarized as follows: (1) The value of μ decreases with increase of γ_t in the range of 0<γ_t≦1.0mm, but increases remarkably with increase of γ_t in the range of γ_t>1.0mm. These decreasing and increasing tendencies with γ_t vary under various combinations of rolling types and diameters (D) of the roller bars (Figs. 3 and 4). (2) The value of μ is smallest when cut with a RR-type roller bar (Fig. 3). (3) The value of μ decreases with increase of D, but the decreasing tendency of μ varies with γ_t and rolling types of roller bars (Fig. 5).
URI: http://hdl.handle.net/10069/7254
ISSN: 13451359
Type: Departmental Bulletin Paper
Appears in Collections:No. 74

Citable URI : http://hdl.handle.net/10069/7254

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