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Manufacturing error compensation based on cutting tool location correction in machining processes

机译：基于加工过程中刀具位置校正的制造误差补偿

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摘要

Inaccuracies in workpiece location lead to errors in position and orientation of machined features on the workpiece, and strongly affect the assemblability and the quality of the product. The accurate positioning of workpiece on a fixture is influenced by rigid body displacements and rotations of the workpiece due to several errors (e.g. geometric radial and position errors in locators and manufacturing tolerances of the workpiece). In this paper, an efficient approach is introduced for analysis and compensation errors in the workpiece-fixture-cutting tool system. A new mathematical formulation of workpiece-fixture modelling is proposed to establish the relationship between the locating errors and their sources. Based on the proposed method, the locating errors of the workpiece can be accurately estimated by relating them to the specific geometric errors or tolerances of the workpiece and the related locators. Then, to eliminate the effects of the locating errors and the cutting tool wear on the machined features, the location and orientation of the cutting tool in the cutter location data are corrected. The proposed method is proper for error analysis and compensation based on worst case analysis approach. The application of the presented method is illustrated through presenting an example and the computational results are compared to the results of simulation of the case study in a computer aided design and manufacturing (CAD/CAM) system.
机译：工件位置的不正确会导致工件上机加工特征的位置和方向错误，并严重影响产品的可组装性和质量。工件在固定装置上的精确定位会受到由于一些误差（例如定位器中的几何径向和位置误差以及工件的制造公差）引起的刚体位移和工件旋转的影响。本文介绍了一种有效的方法来分析和补偿工件夹具切削刀具系统中的误差。提出了一种新的工件夹具建模数学公式，以建立定位误差与误差来源之间的关系。基于所提出的方法，可以通过将工件的定位误差与工件和相关定位器的特定几何误差或公差相关联，来准确地估计工件的定位误差。然后，为了消除定位误差和切削刀具磨损对加工特征的影响，校正切削刀具在位置数据中的位置和方向。该方法适用于基于最坏情况分析方法的误差分析和补偿。通过举例说明该方法的应用，并将计算结果与计算机辅助设计与制造（CAD / CAM）系统中案例研究的仿真结果进行比较。

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