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经观察分析，建立了计算直角自由切削切屑卷曲半径的新模型．新模型比Ｒａｍａｌｉｎｇａｍ模型计算的切屑卷曲半径更接近实测值．对圆弧刃切削的层片厚度与变形系数的关系进行了试验研究，试验结果为“变形愈小，层片愈厚”的结论提供了新的证据．
After observation and analysis, a new model for calculating chip curl radius of free cutting was set up. The new model is closer to the measured value than the chip curl radius calculated by Ramalingam model. The relationship between the slice thickness and the deformation coefficient of the circular arc cutting was experimentally studied, and the test result provided new evidence for the conclusion that “the smaller the deformation, the thicker the slice”.