METHOD AND DEVICE FOR GRINDING SURFACES OF VARIABLE CURVATURE BODY OF REVOLUTION Russian patent published in 1995 - IPC

FIELD: mechanical treatment of large-sized bodies of revolution by abrasive tools. SUBSTANCE: blank-tool contact point is determined from common center of curvature, which center belongs to axis of the blank. Angle of inclination of the tangent is measured at this point. Then speed of rotation of the blank is changed in inverse proportion to distance of the point of contact of the tool, which holds the blank, relatively common center of curvature. Speed of horizontal displacement of the tool is inversely proportional to time of single turn of the article. Speed of vertical displacement is inversely proportional to tangent of angle of slope of tangent line in contact point. Device for grinding has base with string, cross-piece with carriage and drives for shifting cross-piece and carriage, which are mounted onto the string. Lever is hinged onto the cross-piece. Mechanism for adjusting compressing of the tool and drive of rotation of the tool are mounted onto the lever. Table for the blank and drive for rotating table are disposed onto the bed. The device is provided with tool angular and linear coordinate transducers, which are mounted onto the bed along the axis of symmetry of the table. Linear coordinate of the tool is determined relatively point of suspension. Angular position detector is used for measuring coordinates of the lever, which is disposed onto the lever itself. Detectors for measuring end positions of the string and the cross-piece are attached to the string and to the cross-piece correspondingly, as well as program control unit. Tool coordinate detectors and lever angular position detectors are connected with corresponding analog inputs of program control unit. Cross-piece and carriage end position detectors are connected with digital inputs of the control unit. Outputs of digital and analog inputs are connected with power governors of drives for shifting cross-piece and carriage and with drive for rotating table through control switches, which are introduced into the device either. EFFECT: improved accuracy; improved reliability of operation. 2 cl, 2 cl, 4 dwg