測定圧のはさみゲージに及ぼす影響について

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書誌事項

タイトル別名
  • INFLUENCES OF MEASURING PRESSURE UPON SNAP GUAGES
  • ソクテイアツ ノ ハサミ ゲージ ニ オヨボス エイキョウ ニ ツイテ

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説明

When a shaft is measured with a plain snap guage, the diameter of guage is usually expanded by a wedge action due to measuring pressure. The authors made single purpose snap guages of several shapes as testing pieces and compared and examined respective allowable expanse with one another. They obtained the following results. 1) The nearer the guage diameter the position to be measured is, the larger is the allowable expanse with increasing measurement errors. 2)The length of a guage arm should be kept within the necessary minimum limit. 3)The expanse results in appearance of fillet of the guage arm and in relief of the guage surface. The expanse is greatly influenced by the shape and size of undercut. 4)As the coefficient of friction varies with different materials and conditions of pieces to be measured, the expanse varies too and the accuracy of measurement becomes changeable. Accordingly in order to improve the accuracy of measurement, it is essential further to know the relation of the working tolerance with the abrasion allowance and the optimum application scope of snap guages in practical use.

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