For thin-walled parts, uniform allowance to each machining surface is allocated by the traditional machining method. Considering the sequence of the adjacent machining features, it may cause poor stiffness for some side walls due to a minor wall thickness, which may cause the deformation of the final formed parts to be large, or deduce machining efficiency for some machining features due to too thick remains. In order to address this issue, a non-uniform allowance allocation method based on interim state stiffness of machining features for the finishing of thin-walled structural parts is proposed in this paper. In this method, the interim state model of machining features is constructed according to the machining sequence of the parts, and the stiffness of the side wall is taken as the evaluation index to allocate reasonable allowance value to the corresponding machining surface to ensure the stiffness requirement of the parts in the machining process. According to the finite element simulation results, the non-uniform allowance allocation method proposed in this paper can effectively improve the stiffness of the parts and reduce the deformation of the parts, when compared with the traditional uniform allowance machining method.

中文翻译：

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基于加工特征过渡态刚度的非均匀余量分配方法，用于结构零件的数控编程

对于薄壁零件，传统的加工方法会为每个加工表面分配均匀的余量。考虑到相邻加工特征的顺序，由于壁厚较小，可能会导致某些侧壁的刚度较差，这可能会导致最终成型零件的变形变大，或者由于某些原因也会降低某些加工特征的加工效率厚厚的遗骸。为了解决这个问题，本文提出了一种基于加工特征过渡态刚度的非均匀余量分配方法，用于薄壁结构件的精加工。该方法根据零件的加工顺序构造加工特征的过渡状态模型，以侧壁的刚度为评价指标，为相应的加工面分配合理的余量，以保证零件在加工过程中的刚度要求。根据有限元模拟结果，与传统的均匀余量加工方法相比，本文提出的非均匀余量分配方法可以有效地提高零件的刚度，减少零件的变形。