In die-mold manufacturing and aircraft industry, many components that have thin-walled features are produced by turning operation. The major problem encountered during internal or external turning is cutting force induced deflection of workpiece along the periphery as well as axial length of a component. The present research work aims to develop a mathematical model for estimating dimensional and geometric errors during turning of thin-walled hollow cylinder qualitatively and quantitatively. In the proposed model, a mechanistic approach which is semi-analytical in nature is followed to achieve accuracy of the predicting results. First of all, process geometry model for thin-wall turning is developed based on process geometry variables such as uncut chip thickness, actual feed per revolution, actual depth of cut, peripheral cutting speed, effective cutting area etc. Using these process geometry variables and mechanistic cutting constants, a force model of turning is developed to estimate the tangential and radial force components. Later on, based on the predicted forces, tool-workpiece combined deflection model is developed to estimate radial, diametric and various geometric errors of the turned surface. The developed models are able to predict radial, diametric and various geometric errors such as straightness, circularly and cylindricity errors without conducting expensive actual machining operation. Hence, the present study will be helpful to take care of precautionary measures for controlling of dimensional and geometric errors more efficiently and reliably. Therefore, an attempt has been made to provide a basic platform to machining practitioners and process planners for in-depth comprehension and characterization of dimensional and geometric errors of the entire turned surface for varying machining conditions.

在模具制造和飞机工业中，许多具有薄壁特征的部件是通过车削操作生产的。在内部或外部车削过程中遇到的主要问题是切削力引起的工件沿周边以及部件轴向长度的偏转。目前的研究工作旨在开发一种数学模型，用于定性和定量地估计薄壁空心圆柱车削过程中的尺寸和几何误差。在所提出的模型中，遵循本质上是半分析的机械方法来实现预测结果的准确性。首先，基于未切削切屑厚度、实际每转进给量、实际切削深度、圆周切削速度、有效切削面积等。使用这些工艺几何变量和机械切削常数，开发车削力模型来估计切向和径向力分量。之后，基于预测的力，开发了刀具-工件组合挠度模型，以估计车削表面的径向、直径和各种几何误差。开发的模型能够预测径向、直径和各种几何误差，如直线度、圆度和圆柱度误差，而无需进行昂贵的实际加工操作。因此，本研究将有助于采取预防措施，以更有效和可靠地控制尺寸和几何误差。所以，