Novel Framework for Optimizing Non-Uniform Pitch Milling

优化非均匀螺距铣削的新框架

• 批准号: 0522910
• 负责人: Nejat Olgac
• 金额: --
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-06-15 至 2010-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0522910&HistoricalAwards=false
• 关键词: Novel; Framework; Optimizing; Non; Uniform

The main objectives of this research are to investigate analytical tools for optimizing a milling process that uses non-uniform pitch cutters, and to validate the analytical findings experimentally. The focus in the analytical investigation is primarily on the multiple time-delay effects on the chatter stability of the dynamics. The problem gives rise to transcendental characteristic equations with rationally unrelated time delays, which have to be resolved in the domain of the delays from the perspective of stability. Optimum cutter design will be investigated based on a trade-off between the chatter rejection ability and increased productivity. Corresponding optimum cutting conditions will also be derived. The approach will be based on a recent mathematical paradigm of the principal investigator , which is called the "Cluster Treatment of Characteristic Roots". This paradigm will create a display that is analogous to the conventional stability lobes, except for the complete set of pitch angle variations. Broad ranging experimental studies will be performed using various cutter geometries and the correspondence of the analytical and experimental findings will be investigated in each case.If successfull, this research will yield a new analytical procedure that will be available to the machine tools science. This procedure will facilitate the selection of optimum cutting parameters to avoid chatter and increase productivity. Such optimized machining conditions will translate into a production cost advantage. The outcome of the research will also be used to train graduate students as well as the practicing manufacturing engineers through various channels of dissemination.

本研究的主要目的是调查分析工具，优化铣削过程中，使用非均匀间距刀具，并验证实验分析结果。 在分析调查的重点主要是多个时间延迟的颤振稳定性的动态效果。 该问题产生的超越特征方程的合理无关的时间延迟，必须解决的域中的延迟从稳定性的角度来看。最佳的刀具设计将根据颤振抑制能力和提高生产率之间的权衡进行研究。 并导出相应的最佳切削条件。 该方法将基于最近的数学范式的主要研究者，这是所谓的“集群处理的特征根”。该范例将创建类似于常规稳定性波瓣的显示，除了完整的俯仰角变化集之外。 将使用各种刀具几何形状进行广泛的实验研究，并将在每种情况下研究分析结果和实验结果的对应关系。如果成功，这项研究将产生一种新的分析方法，可用于机床科学。 该程序将有助于选择最佳切削参数，以避免颤振并提高生产率。 这种优化的加工条件将转化为生产成本优势。 研究成果还将通过各种传播渠道用于培训研究生以及实践制造工程师。