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Simulative analysis of the influence of cutting fluids on the machining process

切削液对加工过程影响的模拟分析

基本信息

批准号：
403835841
负责人：
Dr. Jörg Kuhnert
金额：
--
依托单位：
Fachgebiet Werkzeugmaschinen und Fertigungstechnik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2018
资助国家：
德国
起止时间：
2017-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/403835841?language=en
关键词：
Simulative analysis influence cutting fluids

项目摘要

The main functions of cutting fluids in machining processes are the cooling of the cutting tool, the workpiece and the machine tool components, the lubrication of the contact surfaces between workpiece and cutting material as well as the support of the chip removal. The application of a cutting fluid often leads to a significant retardation of the tool wear evolution by the reduction of thermo-mechanical tool loads. For the economical and ecological use of cutting fluids a precise set-up of all process parameters is necessary. The knowledge about the relationships between the process parameters and the resulting tool loads are essential for this purpose. However, their experimental determination is very difficult as e.g. the cutting fluid impedes the use of measurement systems. The numerical cutting simulation is predestined for such a task, but the thermo-mechanical loads can only be determined for machining processes without cutting fluids up to now. There is no simulation system which allows the thermally coupled calculation of the chip formation process and the flow of the cutting fluid in the chip formation zone. Such a model is required in order to accurately analyze the influence of the cutting fluid on the machining process and to support tool and process developments. Therefore, the aim of this research project is the simulative analysis of turning processes with cutting fluids. The cooling and lubrication strategies conventional flood cooling and minimum quantity lubrication (MQL) will be investigated. For this purpose, a software tool will be developed which allows the simulation of the influence of the cutting fluid on the thermo-mechanical tool loads as well as the chip formation process. The Finite Pointset Method will be used as simulation method due to its meshfree approach which provides the required flexibility for the mapping of free surfaces.

切削液在机械加工过程中的主要功能是冷却切削刀具、工件和机床部件，润滑工件和切削材料之间的接触表面，以及支持切屑去除。切削液的应用通常通过减少热机械工具载荷而导致工具磨损演变的显著延迟。为了经济和环保地使用切削液，必须精确设置所有工艺参数。关于工艺参数和所产生的刀具载荷之间的关系的知识对于此目的是必不可少的。然而，它们的实验测定是非常困难的，因为例如切削液阻碍测量系统的使用。切削数值模拟是解决这一问题的必然手段，但目前只能在没有切削液的情况下确定切削过程的热机械载荷。不存在允许切屑形成过程和切屑形成区域中的切削液的流动的热耦合计算的模拟系统。为了准确分析切削液对加工过程的影响，并支持刀具和工艺的开发，需要这样的模型。因此，本研究计画的目的是以切削液进行车削过程的模拟分析。将研究传统的溢流冷却和最小量润滑（MQL）的冷却和润滑策略。为此，将开发一个软件工具，允许模拟切削液对热机械刀具载荷以及切屑形成过程的影响。有限点集方法将被用作模拟方法，因为其无网格方法为自由表面的映射提供了所需的灵活性。