リニアモータ駆動・水静圧案内テーブルの開発 : 定流量静圧軸受の基本設計(機械要素,潤滑,工作,生産管理など)

概要

論文の詳細を見る
There are only a few cases that hydrostatic water bearings are applied to machine tools. Since all the water bearings applied were constant-pressure hydrostatic bearings, orifice restrictors of the bearings were easily affected by dust, bacteria and rust of steel. Therefore constant-flow hydrostatic water bearings seem to be more appropriate for the machine tables. Authors are planning to develop a linear-motor-driven grinding-machine table sustained by the constant-flow hydrostatic water bearings. In this paper, theoretical studies have been performed for the basic design of water bearings. Aspect ratio, that is the ratio of rectangular bearing-pad length to its width, has only a little effect on sustaining force, F, and static stiffness, K, of the machine table. F and K linearly increase with land width ratio, β, that is the ratio of doubled land width to pad width, when β is less than about 0.5. But the increasing rate diminishes when β exceeds about 0.5. Effect of β to viscous damping coefficient is also estimated.
社団法人日本機械学会の論文
2009-02-25