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1.引言 目前国内高等院校开设的《误差统计分析》实验是用统计分析的方法分析某工序的加工精度,其方法是在已调整好的机床上连续加工一批试件,测量其加工尺寸。然后用手工进行数据处理,计算标准差σ及平均尺寸X,绘制正态分布曲线,绘制X-R控制图,计算出工件加工的合格率和废品率,以确定本工序的加工精度能力和分析工序加工的稳定性。 由于手工测量、记录并进行数据处理和绘图既费时又易出错。我们研制的《误差统计
1. Introduction At present, the “Error Statistical Analysis” experiment set up by domestic institutions of higher learning is to analyze the machining accuracy of a certain process by means of statistical analysis by continuously processing a batch of test pieces on the adjusted machine tool to measure the machining dimensions . Then the data is processed by hand, the standard deviation σ and the average size X are calculated, the normal distribution curve is drawn, the XR control chart is drawn, the pass rate and reject rate of the workpiece processing are calculated, so as to determine the processing accuracy capability and analysis process of this process Stability. Due to the manual measurement, recording and data processing and drawing are both time-consuming and error-prone. We developed the "error statistics