Broaching operations require stiff machine tools that have to withstand high cutting forces. This work aims to develop a methodology to predict the macroscopic cutting forces on a real, internal broaching operation comprising a large number of teeth. The macroscopic forces are estimated, based on the addition of local forces that are applied to each section and are simultaneously in contact with the broach. These local forces are calculated using a model of specific cutting pressure, depending on the rise per tooth. This study uses two methods to identify this specific cutting pressure model, that is, a direct approach based on orthogonal cutting tests and an inverse approach based on an instrumented broaching operation. It is shown that the direct method is effective in identifying a specific cutting pressure model and enables the prediction of macroscopic forces. Moreover, the direct approach provides more comprehensive results in terms of radial forces.

中文翻译：

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X12Cr13不锈钢内拉削宏观切削力建模

拉削操作需要坚固的机床，必须承受高切削力。这项工作旨在开发一种方法来预测包含大量齿的真实内部拉削操作的宏观切削力。宏观力是根据施加到每个部分并同时与拉刀接触的局部力的相加来估计的。这些局部力是使用特定切削压力模型计算的，具体取决于每齿的高度。本研究使用两种方法来识别这种特定的切削压力模型，即基于正交切削试验的直接方法和基于仪表拉削操作的逆方法。结果表明，直接方法在识别特定切削压力模型方面是有效的，并且能够预测宏观力。此外，直接方法在径向力方面提供了更全面的结果。