曲轴连杆颈圆度在线检测与补偿研究  

Research on online roundness measurement and compensation for crankshaft pin journal

作　　者：俞红祥[1] 

机构地区：[1]浙江师范大学工学院,金华321004

出　　处：《仪器仪表学报》2012年第10期2249-2254,共6页Chinese Journal of Scientific Instrument

基　　金：国家863计划(2008AA042504);国家自然科学基金(51105343)资助项目

摘　　要：研究了一种适用于切点跟踪法磨削曲轴的圆度在线检测与补偿方法,针对连杆颈偏心运动特征提出基于V形基准块、自适应伸缩随动支撑架的圆度检测机构,以自适应支撑架的被动伸缩与摆动抵消连杆颈检测过程偏心运动,实现V形基准块上测量探头与连杆颈的连续、可靠接触。从运动学角度分析了检测过程探头测量角的变化规律,并通过V形基准测圆法微变等效模型求解连杆颈圆度数据。基于切点跟踪法曲轴磨削运动模型建立了连杆颈圆度偏差补偿函数,继而实现连杆颈圆度偏差的在线测量与实时补偿。圆度检测机构几何模型的仿真结果与理论分析相一致,实验室构建的测量装置样机以及曲轴磨削试样检测数据验证了所研究圆度在线检测与补偿方案的正确性和有效性,表明其在曲轴精密磨削应用中具有良好应用前景。An online roundness measurement and compensation method is proposed for tangential point tracing grinding of crankshaft pin journal, in which, a roundness measuring mechanism based on V shape reference frame and adaptive telescopic following support is developed to counterbalance the eccentric motion of pin journal during scanning process. Hence continuous and reliable contact between the pin journal and linear displacement sensor on V shape reference frame is achieved. Variation characteristic of sensor detection angle is analyzed kinematically and originalroundness error is solved from sensor signal using microchange equivalent model of V shape reference frame. To implement roundness data, compensation function is established based on tangential point tracing grinding motion model. Thus online roundness measurement and compensation is fulfilled. Computer simulation shows good agreement with theoretical analysis of the measuring mechanism. Experimental prototype and the test data obtained from grinding samples prove the validity and feasibility of the proposed scheme, which indicates that the online roundness measurement and compensation scheme for tangential point tracing grinding emerges good application prospect in precise machining of crankshaft.

关 键 词：圆度检测 切点跟踪 曲轴磨削 误差补偿 

分 类 号：TH89[机械工程—仪器科学与技术]