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Development of a simulation based method for a load dependent optimisation of cemented carbide tools for nickel-base alloys - Variable micro geometry along the cutting edge

开发基于模拟的方法，用于镍基合金硬质合金刀具的负载相关优化 - 沿切削刃的可变微观几何形状

基本信息

批准号：
313918187
负责人：
Professor Dr.-Ing. Dirk Biermann
金额：
--
依托单位：
Institut für Spanende Fertigung
依托单位国家：
德国
项目类别：
Research Grants (Transfer Project)
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/313918187?language=en
关键词：
Development simulation based method load

项目摘要

This knowledge transfer project proposal is based on the fundamental research project: Modelling of the thermo-mechanical loads and wear behavior for optimisation of cemented carbid twist drills. The former project focused on the three-dimensional FE-simulation of chip formation for the prediction of the influence of the cutting edge preparation on the tool load during drilling processes. The low spatial resolution and long calculation times lead to difficulties during the analysis of the simulation. Therefore, an alternative model was proposed. These simulations of orthogonal cutting are carried out, which represent different orthogonal cut on the first primary cutting edge of a drilling tool. This technique offered the advantage of higher spatial resolution and shorter calculation times and should be applied and extended for drilling and milling of nickel-base alloys. This includes the consideration of local process conditions like the radius-dependent cutting speed in drilling by using design of experiments. The tool wear is simulated by the model of Usui. The parametric description of the cutting edge can be used for the statistical modelling of the tool wear which provides a wear prediction for every possible combination of parameter values. Furthermore, the statistical model is used to find cutting edge parameters which minimize the tool wear. This approach is extended here to milling processes, which have characteristic variations of the uncut chip thickness during a single tool rotation. Furthermore, a method is developed for measuring prepared cutting edges. Finally, optimized tools are compared to standard tools in experimental tests.

这个知识转移项目提案是基于基础研究项目：为优化硬质合金麻花钻的热机械载荷和磨损行为建模。前一个项目侧重于切屑形成的三维有限元模拟，以预测钻井过程中刃口制备对刀具载荷的影响。空间分辨率低，计算时间长，给仿真分析带来困难。因此，提出了一种替代模型。模拟了在钻具第一主切削刃上不同的正交切削过程。该技术具有空间分辨率高、计算时间短等优点，在镍基合金的钻铣加工中具有推广应用的前景。这包括通过使用实验设计来考虑局部工艺条件，如钻孔中与半径相关的切削速度。利用Usui模型对刀具磨损进行了仿真。切削刃的参数描述可用于刀具磨损的统计建模，为参数值的每种可能组合提供磨损预测。在此基础上，利用统计模型寻找刀具磨损最小的切削刃参数。这种方法在这里扩展到铣削过程，在单次刀具旋转过程中具有未切削切屑厚度的特征变化。此外，还开发了一种测量制备切削刃的方法。最后，将优化后的刀具与标准刀具进行了实验对比。