The existing methods for control of geometrical dimensions of details were analyzed. The basic scheme of automatic plant for controlling the diameter and ovality of precision cylindrical details by pneumatic method was described. There was given recommendations for the choice of basic parameters of pneumatic measuring system for providing the high precision control process at maximum performance. The described device provides control of diameter and ovality of cylindrical details with an accuracy of 0.002 microns and sorting of controlled details into three groups: fit, small reject, big reject.
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