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

• 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

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.

该知识转移项目提案基于基础研究项目：热机械载荷和磨损行为建模以优化硬质合金麻花钻。前一个项目侧重于切屑形成的三维有限元模拟，以预测钻孔过程中切削刃准备对刀具负载的影响。空间分辨率低和计算时间长给模拟分析带来困难。因此，提出了一种替代模型。进行了这些正交切削模拟，其代表了钻削刀具的第一主切削刃上的不同正交切削。该技术具有较高的空间分辨率和较短的计算时间的优点，应该在镍基合金的钻削和铣削中得到应用和推广。这包括通过使用实验设计来考虑局部工艺条件，例如钻孔中与半径相关的切削速度。采用臼井模型对刀具磨损进行模拟。切削刃的参数化描述可用于刀具磨损的统计建模，为每种可能的参数值组合提供磨损预测。此外，统计模型用于寻找最小化刀具磨损的切削刃参数。这种方法在此扩展到铣削工艺，铣削工艺在单次刀具旋转期间具有未切削切屑厚度的特征变化。此外，还开发了一种测量准备好的切削刃的方法。最后，在实验测试中将优化的工具与标准工具进行比较。

项目成果

Investigation on cutting edge preparation and FEM assisted optimization of the cutting edge micro shape for machining of nickel-base alloy

• DOI: 10.1007/s11740-019-00900-8
• 发表时间: 2019-06-01
• 期刊: PRODUCTION ENGINEERING-RESEARCH AND DEVELOPMENT
• 影响因子: 1.7
• 作者: Tiffe, M.;Assmuth, R.;Biermann, D.
• 通讯作者: Biermann, D.

Simulation based analysis and optimisation of the cutting edge micro shape for machining of nickel-base alloys

• DOI: 10.1016/j.procir.2017.12.214
• 发表时间: 2018-01-01
• 期刊: 11TH CIRP CONFERENCE ON INTELLIGENT COMPUTATION IN MANUFACTURING ENGINEERING
• 作者: Biermann, Dirk;Assmuth, Robert;Tiffe, Marcel
• 通讯作者: Tiffe, Marcel