FIELD: technological processes.
SUBSTANCE: invention relates to the field of abrasive machining and can be used for completely grinding large crankshafts of truck engines, ship engines, or stationary engines. During one installation of the crankshaft, both journal and fillet portions, as well as end zones and flanges thereof, are roughly and smoothly ground. During rough grinding, steady-rest seats are ground. Crankshaft is driven into rotation at both clamped ends by means of synchronously working electric drives. Shape of the lateral surface of the fillet and/or journal portions is achieved by interpolating the movement of the first grinding wheel around X1, Z1 axes and WK1 rotation axis with the CNC. Cubic boron nitride grinding wheel is used, whose width is smaller than the axial length of the fillet and journal portions of the crankshaft. Preferably, several current diameters are measured at a distance from each other using an operational measuring device along the axial length of the fillet and/or journal portions. Based on the measurement results, in order to achieve said contour of the lateral surface, drives for axes X1, Z1 and WK1 of the grinding wheel are controlled.
EFFECT: improved precision and quality of grinding large crankshafts.
23 cl, 14 dwg
