基于CCD的大型台阶轴锻件同轴度测量

为解决大型锻件几何尺寸的在线测量这一难题,提出并开发了一种基于面阵CCD的测量系统。该系统可实现大型锻件多种几何参数的热态、远程、非接触测量。本文重点介绍台阶轴锻件同轴度的测量。测量的数学模型基于CCD成像原理建立。结果显示,用本文方法测量普通锻件(直径400～550mm)时最大误差为1.5mm;约为被测锻件最大直径的0.3%。与其他测量方法相比,系统具有非接触、操作简单、可靠性高等优点。可在锻件的加工中节省7%的原材料,提高后期加工效率,降低产品的运输成本。

Coaxiality measurement of large-size forged components based on CCD

Due to the huge size and high temperature,it is a difficult task to on-line measure the geometrical parameters of large-size forged components.To solve this problem,a dimensional measurement system for large-size forged components was developed based on planar Charge-coupled Device(CCD),which can be used to for remote and contactless measurements of various geometrical parameters of high temperature forged components.The focus of this article is placed on coaxiality measurement of multi-diameter forged shaft.The mathematical model was established using planar CCD imaging model.Experiment results show that the measurement error is less than 1.5 mm for general size gorging(400-550 mm in diameter),which means the relative measurement error is about 0.3%.Compared with existing measurement systems,the proposed system has many advantages,such as simple operation,convenience and high reliability etc.It is estimated that about 7% of raw materials can be saved using the proposed system.