【作者】 王天煜；

【导师】 张树森；

【作者基本信息】 辽宁工程技术大学 ， 机械制造及其自动化， 2005， 硕士

【摘要】 本文在对激光衍射测量技术及CCD技术进行了较为广泛和深入的理论分析和实验的基础上,探讨了用激光衍射测量技术及CCD技术测量回转类零件形位误差的非接触精密测量方法。在理论研究的基础上,实现自动识别一桢ccD信号暗点个数,对个别暗点进行粗略定位,用最小二乘曲线拟合方法实现暗点的精确定位。建立评定回转体形位误差的数学模型,采用半径增量法,在垂直于工件的回转轴线的等间距截面轮廓上,获得等角度间隔的离散采样点采样资料,根据不同的数学模型求得不同评定方法的圆度、圆柱度、同轴度、轴线直线度、跳动等回转体形位误差数值,实现了回转类零件形位误差的综合评定。通过误差分析及实验,表明激光衍射方法测量回转类零件形位误差具有精度高、非接触测量、易实现自动化测量等特点,有很好的实用性。更多还原

【Abstract】 Both the comparatively extensive and deep theoretical analysis and the experiments of the measuring technology of laser diffraction and CCD technology are performed in this thesis, by which the precision and non-contacting method used to measure the form and position errors for the rotary parts are also investigated. On the basis of the theoretical results, it has been realized that the number of dark dots in the CCD signal is automatically discerned, with all of dark dots roughly positioned, while an accurate positioning of these dark dots is made with least square axis method. Mathematical models of form and position errors for the rotary parts are established, with the radius incremental approach, and the sample data of dispersedly sampled points with alternate angle is obtained on the equilong sections that are perpendicular to the rotary axis. Different mathematics models are employed to evaluate the above method by calculating the form and position errors of roundness, cylindricity, coaxality, axis straightness etc, which results in a comprehensive evaluation of the form and position errors for the rotary workpiece.The error analysis and experiments indicates that the laser diffraction is one of the methods with high precision, non-contacting measurement, ease of realizing automation and good practical significance.更多还原