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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.

切削液在加工过程中的主要作用是对刀具、工件和机床部件的冷却，对工件与切削材料接触面的润滑以及对排屑的支撑。切削液的应用通常通过减少刀具的热机械载荷而显著延缓刀具的磨损演变。为了经济和生态地使用切削液，必须精确设置所有工艺参数。关于过程参数和最终工具负载之间关系的知识对于这一目的是必不可少的。然而，它们的实验测定是非常困难的，例如切削液阻碍了测量系统的使用。数值切削模拟是为这一任务而设计的，但目前只能确定无切削液加工过程的热机械负荷。目前还没有能够对切屑形成过程和切屑形成区切削液流动进行热耦合计算的仿真系统。为了准确地分析切削液对加工过程的影响，并支持工具和工艺的发展，需要这样的模型。因此，本研究项目的目的是模拟分析切削液的车削过程。研究了常规冷却和最小量润滑两种冷却润滑策略。为此，将开发一种软件工具，可以模拟切削液对热机械刀具载荷的影响以及切屑形成过程。有限点集法将被用作模拟方法，因为它的无网格方法为自由曲面的映射提供了所需的灵活性。