はかり用の一体型平行ばね機構の変位特性(第5報) : 最小板厚に寸法誤差のある4個の円弧ばねの場合

概要

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There is an ideal point with constant translational displacement in the parallel spring movement comprised of the springs which are symmetric with respect to an axis passing through its midpoint. Compared with the leaf springs, the circular springs can be, from the view point of machinability, made easily with high accuracy, because only boring is needed. Authors studied the effect of the dimensional error of the minimum thickness of the springs on the error rate of displacement of the moment. The paper may be summarized as follows ; (1) Around fifty percent of the dimensional error of the minimum thickness contributes to the error rate of the displacement. This leads directly to the error of mass to be measured by the movement as balance, (2) There exists no difference in the effects of the dimensional errors on the error rate of displacement, between two springs of the upper or lower side, (3) Owing to the mutual compensation, the dimensional errors of the upper and lower springs brought by boring a circular hole through a blank cause no the error rate of displacement, and (4) the existence of the reinforcing plate attributes to improve the sensitivity of the movement as balance and reduce the error rate of displacement.
公益社団法人精密工学会の論文
1989-08-05