摘要
掌握不同时刻刀具径向尺寸对评估刀具径向磨损量具有极大意义.基于线结构光视觉测量原理,设计了一套可以实现刀具在位测量的系统,可利用系统测得不同时刻的刀具径向尺寸.根据实际测量情况提出了一种基于半径和轴线约束的最小二乘圆柱轴线拟合方法,利用该方法能够实现刀具轴线的快速测量,并利用测得的轴线计算出刀具整体的三维坐标.研究了刀具安装偏心对测量结果造成的影响,并对测量结果进行了修正.实验结果表明,系统能够实现刀具在位测量,测量精度达到0.02 mm,且能很好地获取刀具的形貌特征.
It is significant for evaluating tool radial wear if the radial dimension of the tool can be ob- tained at different time. An NC tool in-situ measurement system based on line structured light is devel- oped, by which the tool radial dimension can be measured at different time. According to the actual measurement, a least square cylinder axis fitting method based on radius and rotary axis constraint is pro- posed, which can measure the tool axis rapidly. And the 3D coordinates of the tool can be obtained based on the tool axis equation. The measurement results are corrected on account of the impact caused by ec- centric clamp. The experiment results show that NC tool in-situ measurement can be realized with the measurement system proposed, and the system can measure the 3D shape of tool well, with the accuracy better than 0. 02 mm.
出处
《纳米技术与精密工程》
CAS
CSCD
北大核心
2017年第2期106-113,共8页
Nanotechnology and Precision Engineering
基金
湖北省自然科学基金资助项目(2014CFB637)
关键词
数控刀具
径向尺寸
在位测量
轴线拟合
偏心修正
NC tool
radial dimension
in-situ measurement
rotary axis fitting
eccentricity correction
