| 摘要 |
An apparatus for checking a camshaft (4), in particular for checking the parameters of the profiles of cams (5-12), comprises means (3, 19, 20, 21) for positioning and axially rotating the shaft, first checking elements (27-39) for determining radial dimensions of cams (5-12) in the course of the rotation, second checking elements (40-47), distinct from the first, for cooperating with a reference portion of the shaft (4) and locating an angular reference position, a rotary transducer (26) for defining said angular position and angular detection positions, and a control unit (63) for receiving and processing signals arriving from the checking devices and from the rotary transducer. For each cam there is memorized (74) and processed (75) a sequence of values (h(i)) pertaining to its profile, there is calculated (76, 77) the value (xBF) of the mutual phase difference with respect to a nominal profile (T), and the actual profile to be checked (H) is inspected with reference to a second nominal profile (T') determined by angularly displacing the nominal profile (T) of an angle equal to the value (xBF) of the calculated phase difference. |
