静的シールの設定圧着応力に及ぼす表面粗さの影響 : 第3報,硬いくさび形突起と軟らかい平面とのシール特性

概要

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The sealing characteristics between the surface of an annular wedge-shaped rigid asperity and a smooth seal face of plastic material in static contact were investigated by varing the apex semiangle of the wedge-shaped asperity (θ=15~90°), the surface roughness (R_<max>≒1~100μm) and the finishing of the seal face (turning and grinding). The following results were obtained: (1) In the case of θ=15~60°, the p_c-values of the compressive stress for sealing were approximately 0.8~1.1 times the Meyer hardness in the seal surface layer of copper, regardless of the R_<max>-values. (2) In the case of θ=90°, the p_c/1-values were about 0.9~1.5 times the tensile strength of copper, regardless of the R_<max>-values. (3) The P_c/1-values of the compressive force for sealing were constant in the range of R_<max>≦14μm, and increased with an increase in R_<max>-values in the range of R_<max>>14μm. The P_c/1-values of the ground seal face were higher than those of the turned seal face. And the P_c/1-values of θ=15~60° were about one-fifth of those of θ=90°
一般社団法人日本機械学会の論文
1989-07-25