摘要
针对螺尖丝锥生产过程中几何参数测量稳定性差、测量信息不全和测量效率低等问题,提出一种基于线激光扫描的快速非接触测量方法。首先,根据齐次坐标变换理论建立了螺尖丝锥非接触测量运动学模型,并在对测量数据进行预处理后,基于多视角拼接实现了螺尖丝锥的全信息曲面重构;然后,提出了考虑螺尖丝锥曲面特征的点云分割方法和刃部刃线提取算法,并在此基础上实现了丝锥前角、刃倾角、芯径、刃背宽度等几何参数的全面高效计算;最后,在数控机床上针对生产过程中的螺尖丝锥开展了测量重复性实验和对比实验。结果表明,该方法平均测量效率提升了3.88倍且最大相对误差不超过2%,验证了测量系统的可行性以及具有良好的测量稳定性、测量效率和准确性。
To address the problems of poor stability,incomplete information,and low efficiency of geometric parameter measurement in the production of spiral point taps,a fast non-contact measurement method based on line laser scanning is proposed.Firstly,the noncontact measurement kinematics model for spiral point taps is formulated,which is based on the homogeneous transformation theory.After the preprocessing of measurement data,the full-information surface reconstruction of spiral point taps is realized based on multiview splicing.Then,a point cloud segmentation method and an edge line extraction algorithm considering the surface characteristics of spiral point taps are proposed.On this basis,the geometric parameters,such as the rake angle,spiral pointed angle,core diameter,land width,etc.of taps are calculated comprehensively and efficiently.Finally,the measurement repeatability and comparison experiments are implemented on the CNC machine tool for the spiral point tap in the production process.Results show that the average measurement efficiency of the proposed method increases by 3.88 times and the maximum relative measurement error is less than 2%,which evaluates the feasibility of the measurement system and has good measurement repeatability and accuracy.
作者
夏长久
王远洋
江磊
Xia Changjiu;Wang Yuanyang;Jiang Lei(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China;State Key Laboratory for High Performance Tools/Chengdu Tool Research Institute Co.,Ltd,Chengdu 610500,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2024年第8期235-245,共11页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(52205541)
中国博士后科学基金(2022M712635)
高性能工具全国重点实验室开放课题(GXNGJSKL 202417)
中央高校基本科研业务费(2682023CX023)项目资助。
关键词
螺尖丝锥
几何参数
非接触测量
线激光传感器
spiral point taps
geometric parameters
non-contact measurement
line laser sensor
