曲轴连杆颈圆度误差的测量与评定方法研究  

Research on roundness error measurement and evaluation for crankshaft pin journal

作　　者：田慧慧[1,2] 王亚晓[1,2] 王洪喜[1,2] 王冠伟[1,2] 焦艳梅[3] Tian Huihui;Wang Yaxiao;Wang Hongxi;Wang Guanwei;Jiao Yanmei(School of Mechatronic Engineering,Xi'an Technological University,Xi'an 710021,China;National and Local Joint Engineering Research Center for Precision and Ultra-precision Machining and Measurement,Xi'an Technological University,Xi'an 710021,China;School of Mechanical and Material Engineering,Xi'an University,Xi'an 710065,China)

机构地区：[1]西安工业大学机电工程学院,西安710021 [2]西安工业大学精密与超精密加工及测量国家地方联合工程研究中心,西安710021 [3]西安文理学院机械与材料工程学院,西安710065

出　　处：《仪器仪表学报》2023年第7期53-61,共9页Chinese Journal of Scientific Instrument

基　　金：西安市未央区科技计划(202113)项目资助。

摘　　要：曲轴轴颈圆度是评价曲轴合格性和加工精度的一项重要指标。针对曲轴综合测量过程中连杆轴颈沿主轴颈公转运动,导致连杆轴颈的检测数据无法直接用于圆度误差评定的问题,建立基于运动坐标系的圆度误差检测模型,实现了连杆轴颈检测数据转换处理。同时,深入分析用于圆度误差评定的3种最小二乘法的适用条件,结合采样数据的特点实现了连杆轴颈圆度误差的高精度检测。以某型号发动机曲轴为例进行大样本误差检测试验,并与最小区域评定结果进行对比,偏差在1μm以内。数据分析表明了所提出的曲轴连杆轴颈圆度误差检测方法理论上的正确性及工程实践的可行性。Crankshaft journal roundness is an important indicator for evaluating the qualification and machining accuracy of the crankshaft.To address the problem of the inability to directly use the detection data of the crankpin for roundness error evaluation due to the revolving motion of the crankpin along the main journal during the measurement process,a roundness error detection model based on a motion coordinate system is formulated to realize the conversion and processing of the detection data of the crankpin.Meanwhile,by deeply analyzing the applicable conditions of three least squares methods used for roundness error evaluation and combining the characteristics of the sampled data,high-precision detection of the roundness error of the crankpin is achieved.Take a certain model of engine crankshaft as an example,a large sample error detection test is carried out,and the results are compared with the minimum zone evaluation,with a deviation within 1μm.The data analysis shows the theoretical correctness and practical feasibility of the proposed method for detecting the roundness error of the crankpin.

关 键 词：曲轴 连杆颈 圆度误差 最小二乘法 

分 类 号：TH71[机械工程—测试计量技术及仪器]