Abstract

The modeling of equivalent fixture error (EFE) in machining process has been proved to be an effective way for variation reduction. However, previously developed approaches did not describe the EFE phenomenon of workpiece deformation. This paper proposes a comprehensive EFE model that can simultaneously transform the datum errors, machine tool path error and workpiece deformation to EFE. The developed model can also describe the EFE phenomenon for general fixture layouts rather than being limited to an orthogonal 3–2-1 layout case. Based on this comprehensive error compensation strategy, the datum errors, machine tool path error and workpiece deformation can be compensated for machining process with general fixture layouts. The case studies demonstrate the model validity through the real machining experiments and also show a simple simulation process for error compensation.

中文翻译：

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具有通用夹具布局的加工过程的全面误差补偿策略

摘要

加工过程中的等效夹具误差（EFE）建模已被证明是减少偏差的有效方法。但是，先前开发的方法并未描述工件变形的EFE现象。本文提出了一个综合的EFE模型，该模型可以将基准误差，机床路径误差和工件变形同时转换为EFE。所开发的模型还可以描述一般灯具布局的EFE现象，而不仅限于正交3–2-1布局情况。基于这种综合的误差补偿策略，可以使用通用夹具布局对加工过程中的基准误差，机床路径误差和工件变形进行补偿。