Online Measurement Device and Method for Levelness of Variable Speed Crankshaft
Real time detection of crankshaft levelness is important to ensure its machining quality,and different working conditions of crankshaft precision machining require matching different rotational speeds.The commonly used manual handheld level in practice has problems such as easy to damage the surface of the workpiece and inability to achieve online measurement.In view of this,a multi-sen-sor fusion non-contact online measurement method for crankshaft levelness was proposed.The laser displacement sensor was synchro-nously calibrated using a hexahedral prism.Then,the mapping relationship between the displacement of the hexahedral prism feature points and the rotation angle was established,and the levelness of each spindle neck and crank pin under the same rotation angle during the machining process was obtained in real time.Compared with the results of coordinate measurement,the levelness error measured by this method is less than 6%,the feasibility of the method is verified.This measurement method overcomes the disadvantages of low effi-ciency and large error of the traditional detection method,which not only improves the continuity and automation level of the machining process,but also reduces the downtime while ensuring the processing quality,which has broad application prospects in online measure-ment of crankshafts at various scales.
levelnessnon-contact online measurementcrankshaftangle and dimension transmission
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