METHOD OF CONTROL OF ACCURACY OF MULTIPASS MACHINING AND DEVICE FOR ITS EMBODIMENT Russian patent published in 1997 - IPC

FIELD: machining. SUBSTANCE: prior to starting the machining, required sizes of workpiece and their tolerances are preset. In execution of each pass, cylindrical coordinates of workpiece are fixed. Further on, determined for each fixed point is machining error and running size of workpiece is compared with preset tolerance zone. Upon completion of pass, function of distribution of machining error is calculated. With consideration of calculated function, lateral feed of cutting or abrasive tool next pass is calculated. In the next pass, correction of lateral position of tool is accomplished for calculated feed values. Lateral feed of tool is determined from the condition, that the sum of machining radius and errors with preset probability are within the established tolerance zone. This probability is calculated by the function of error distribution obtained during the previous pass. The device for embodiment of the offered method consists of machine tool, measurement unit and control circuit. Measurement unit fixes coordinates of workpiece surface in the process of machining. Control circuit processes the measurement results and generates control actions on machine-tool measurements. EFFECT: higher efficiency. 4 cl, 5 dwg