特种头型微钻视觉检测方法研究

Research on Visual Inspection Method of Special Head Micro Drill

摘要:

微钻的生产制造过程中，检测是一个至关重要的环节。面对市场对于特种头型微钻日益增长的需求，提出一种针对特种头型微钻的视觉检测方法。该方法通过拟合直线和拟合圆对刃面直径和芯厚的尺寸进行了测量，同时通过一种改进的直线拟合方法和NURBS样条曲线拟合方法，拟合出了刃面的标准轮廓，从而实现对微钻缺陷有无判断以及大小的计算，最后设计了可视化的软件进行实验。实验结果表明：各种头型微钻的尺寸参数测量重复误差在0.02%以内，缺陷参数测量重复误差在2%以内；提出的方法具有可行，可靠，精确的特点，能快速且有效的满足特种头型微钻的视觉检测。

Abstract:

In the manufacturing process of micro-drills, inspection is an essential part. Facing the growing need of special head micro drill, a visual inspection method is proposed. Shape dimension including blade diameter and core thickness is measured by line and circle fitting, then standard profile of the blade is fitted by an improved line fitting method and NURBS spline curve fitting method, which can be used in the judgement of the defects and the calculation of their size. In the end , a visible software is designed to test the algorithm and the result shows the algorithm, which is valid, reliable and accurate, can meet the need of the inspection of special head micro drill.The measurement repeatability error of dimensional parameters of various head-type micro drills is within 0.02% and defect parameter measurement repeatability error of various head-type micro drills is within 2%.