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

颤振振动导致更高的工具和机器负载以及不良零件的制造。因此，为了避免颤振，目前正在减少工艺参数，或者必须通过实验确定合适的参数集。然而，这种方法导致了生产力的降低或生产计划的增加。因此，本研究项目的目标是研究一个稳定波瓣图的自主计算系统。首先，基于准静态过程力计算切削力模型系数；利用该切削力模型，可以计算动态切削力。将计算得到的动态切削力作为输入，并将测量得到的切削力作为输出，就可以确定刀具/刀柄/机床组合的动态特性。根据切削力模型和确定的系统模型，可以近似地计算出稳定性叶形图。一旦获得不同切削条件下的加工数据，就采用优化算法来减少切削力模型和系统模型中的建模误差。

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.