A novel five-axis on-machine measurement optimization method for complex curved surfaces  

一种新的复杂曲面五轴在机测量优化方法

作　　者：GUO Yan-heng WAN Neng ZHUANG Qi-xin 郭彦亨;万能;庄其鑫

机构地区：[1]Key Laboratory of Industrial Engineering and Intelligent Manufacturing,Northwestern Polytechnical University,Xi’an 710072,China

出　　处：《Journal of Central South University》2025年第2期523-537,共15页中南大学学报(英文版)

基　　金：Projects(51775445,52175435)supported by the National Natural Science Foundation of China;Project(CX2023051)supported by the Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University,China。

摘　　要：On-machine measurement(OMM)stands out as a pivotal technology in complex curved surface adaptive machining.However,the complex structure inherent in workpieces poses a significant challenge as the stylus orientation frequently shifts during the measurement process.Consequently,a substantial amount of time is allocated to calibrating pre-travel error and probe movement.Furthermore,the frequent movement of machine tools also increases the influence of machine errors.To enhance both accuracy and efficiency,an optimization strategy for the OMM process is proposed.Based on the kinematic chain of the machine tools,the relationship between the angle combination of rotary axes,the stylus orientation,and the calibration position of pre-travel error is disclosed.Additionally,an OMM efficiency optimization model for complex curved surfaces is developed.This model is solved to produce the optimal efficiency angle combinations for each to-be-measured point.Within each angle combination,the effects of positioning errors on measurement results are addressed by coordinate system offset and measurement result compensation method.Finally,the experiments on an impeller are used to demonstrate the practical utility of the proposed method.在机测量是复杂曲面自适应加工的关键技术。然而,由于待测工件结构复杂,在测量过程中,探针轴向会频繁地变化。因此,大量时间花费在预行程误差的标定和机床的运动上。此外,机床的频繁运动也增大了机床误差的影响。为了提高在机测量的精度和效率,本文提出了一种在机测量过程的优化方案。基于机床的运动链,揭示了旋转轴的角度组合、探针轴向与预行程误差标定位置之间的关系。此外,还建立了复杂曲面零件的在机测量效率优化模型。通过求解该模型,可为每个待测点生成效率最优的角度组合。在各角度组合下,通过坐标系偏移和结果补偿方法消除定位误差对测量结果的影响。最后,通过叶轮试验验证了该方法的有效性。

关 键 词：on-machine measurement complex curved surfaces efficiency optimization error compensation 

分 类 号：TH161[机械工程—机械制造及自动化]