Conclusions
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1.
The wringing capacity of block gauges is mostly affected by the roughness of their measuring surfaces. It has been found that there exists a linear relationship between the height of microirregularities and the shearing force; moreover, with a surface finish of class 14a–13c the shearing force, as a rule, is not lower than 3 kg-wt, which meets the requirements of GOST 9038-59.
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2.
The shape and position of microirregularities has a considerable effect on the wringing capacity. The shearing force of lapped gauges is raised considerably by providing the measuring surfaces with a network of mutually intersecting irregularities by means of appropriate kinematics of lapping.
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3.
The effect of flatness both in a free and lapped condition of gauges is less important, especially for thin, easily strained gauges.
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Literature cited
Lu Ch'ao-chiang, Investigation of the Phenomena of Adhesion and Friction between Plane Steel Surfaces. Author's Abstract of his dissertation for a Candidate's Degree, Moscow (1960).
V. A. Solov'ev, Izmeritel'naya tekhnika, No. 4 (1960).
P. V. Denisov, Izmeritel'naya tekhnika, No. 2 (1958).
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Kremen', Z.I. The effect of micro- and macro-configurations of block-gauge measuring surfaces on their wringing capacity. Meas Tech 6, 114–117 (1963). https://doi.org/10.1007/BF01643655
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DOI: https://doi.org/10.1007/BF01643655