Modeling and Compensation of Thermic Processing Influence for Short Hole Drilling

短孔钻削热加工影响的建模与补偿

基本信息

批准号：
178689393
负责人：
Professor Dr.-Ing. Peter Eberhard
金额：
--
依托单位：
Institut für Technische und Numerische Mechanik (ITM)
依托单位国家：
德国
项目类别：
Priority Programmes
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/178689393?language=en
关键词：
Modeling Compensation Thermic Processing Influence

项目摘要

Both the dimensional accuracy and the surface quality of a manufactured component are considerably influenced by the warming of the workpiece occurring during the machining process in short hole drilling. In the course of the six-year project, it is intended to develop a coupled simulation tool, based on the Smoothed Particle Hydrodynamics (SPH) particle method and the Finite Element Method (FEM). With this tool, it will be possible to model the aforementioned thermal effects as well as the resulting loads on the manufactured workpiece for the short hole drilling process. The main aim of this research project is to work out simulation-assisted compensation principles for the deformations of components with geometrically complex shapes arising due to thermal loads in short hole drilling.Based on the findings gained from the simulations and experimental investigations carried out during the first two phases of this project, a dynamically and synchronously coupled SPH/FEM model focusing on the short hole drilling process is developed in the third funding period. Following this, the process model worked out will be validated with the results of the experimental tests on components with geometrically simple as well as complex shape. That way, it is intended to create an adequate, thermomechanically coupled simulation tool in the third project phase, which will be used to find compensation principles minimizing the thermal influences observed during the process of machining with geometrically defined cutting edge. Towards the end of the two-year project phase and, thus, also of the overall research project, the previously developed compensatory measures for short hole drilling are validated based on simulations as well as experimental investigations.

制成部分的尺寸精度和表面质量都受到在加工过程中在短孔钻孔中发生的工件变暖的影响。在六年项目的过程中，它旨在基于平滑的粒子流体动力学（SPH）粒子方法和有限元方法（FEM）开发一个耦合的仿真工具。使用此工具，可以对上述热效应进行建模，以及在短孔钻孔过程中制成工件上产生的负载。该研究项目的主要目的是确定模拟辅助补偿原理，以使由于在短孔钻孔中的热载荷引起的几何复杂形状的组件变形。基于从模拟和实验研究中得出的发现，并进行了实验研究。该项目的前两个阶段，即专注于短孔钻井过程的动态和同步耦合的SPH/FEM模型。此后，将通过对具有几何简单和复杂形状的组件的实验测试的结果进行验证。这样，它旨在在第三个项目阶段创建一个足够的热机械耦合模拟工具，该工具将用于查找补偿原理，以最大程度地限制在使用几何定义的切好的切割边缘加工过程中观察到的热影响。在为期两年的项目阶段结束时，还基于模拟和实验研究，验证了先前开发的短孔钻孔补偿措施。