Autonomous calculation of stability lobe diagrams, based on sensory structural compo-nents of a milling center

基于铣削中心的传感结构组件自主计算稳定性波瓣图

• 批准号: 416001186
• 负责人: Professor Dr.-Ing. Berend Denkena
• 金额: --
• 依托单位: Institut für Fertigungstechnik und Werkzeugmaschinen (IFW)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/416001186?language=en
• 关键词: Autonomous; calculation; stability; lobe; diagrams

Chatter vibrations result in higher of tool- and machine loads as well as the manufacturing of reject parts. Hence, process parameters are currently being reduced in order to avoid chatter vibrations or suitable sets of parameters must be determined experimentally. However, this approach results in a reduction of productivity or a high effort in the production planning respectively. Therefore, the goal of this research project is the investigation of a system for autonomous calculation of stability lobe diagrams. First, the coefficients of a cutting force model are calculated based on the quasistatic process force. With the cutting force model, it is possible to calculate dynamic cutting forces. With the calculated dynamic cutting forces as input and the cutting forces, measured with the sensory structure components, as output it is possible to determine the dynamic properties of the tool/tool-holder/machine combination. Based on the cutting force model and the determined system model it is possible to calculate a stability lobe diagram in a first approximation. As soon as process data from different cutting conditions are available, an optimization-algorithm is to be used to reduce modelling errors in the cutting force model and the system model.

颤振导致更高的工具和机器负载以及制造不良零件。因此，目前正在减少工艺参数以避免颤振，或者必须通过实验确定合适的参数组。然而，这种方法分别导致生产率的降低或生产计划中的高工作量。因此，本研究计画的目标是调查一个系统的自主计算的稳定性波瓣图。首先，基于准静态过程力计算切削力模型的系数。利用切削力模型，可以计算动态切削力。以计算出的动态切削力作为输入，以传感结构部件测量的切削力作为输出，可以确定刀具/刀架/机床组合的动态特性。基于切削力模型和确定的系统模型，可以以第一近似计算稳定性波瓣图。一旦可获得来自不同切削条件的过程数据，就使用优化算法来减少切削力模型和系统模型中的建模误差。