静電容量を用いたはめ合い部品の位置決め

概要

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This paper describes the development of an insertion technique of parts with small radial clearance. The insertion principle is based on measurements of electrostatic capacitance change between the conducting surface of the parts to be paired. If, for example, a bar part and a fixed hole part are set parallel to each other with small vertical clearance, they form a capacitor whose dielectric medium is air. The capacitance depends on the overlapping surface area of the paired parts if the vertical clearance is constant. During insertion, if the bar part can move freely with respect to the horizontal plane of the fixed hole part, the capacitance is minimum when the horizontal centerlines of both parts coincide. Under this condition, the bar part can be inserted smoothly into the hole part. The practicality of the method is investigated through the experiments. As the result, it was found that the capacitance measurement method is an effective means of ensuring the proper positioning of parts during insertion. In the case of insertion of cylindrical parts and rectangular block parts, positioning error is within 4 μm.
公益社団法人精密工学会の論文
1994-08-05