Reduction of Thermal FEM Simulation Models for Online Applications on Machine Tools - SimTherm

减少机床在线应用的热 FEM 仿真模型 - SimTherm

• 批准号: 157640986
• 负责人: Professor Dr.-Ing. Uwe Heisel
• 金额: --
• 依托单位: Institut für Werkzeugmaschinen (IFW)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/157640986?language=en
• 关键词: Reduction; Thermal; FEM; Simulation; Models

Thermally induced displacements continue to represent one of the main problem areas in the machine tool sector. To compensate displacements, simplified FE simulation models are developed within the context of this research project. It will be possible with these models to carry out compensating calculations online through the NC machine control in future (software in the loop). In the first funding period extensive experimental tests were conducted on machine components for the adaptation of the FE simulations. Then these tests were compared with simulation models to create exact prediction models, which are reduced in their complexity though.In the third year of the project the applicability and the scalability of the parameters, which were determined of simple structures (bearings, guide carriages and ball screws) at first, are examined on complex structures (feed drive unit). For the completion of the research project it is planned to draw up a catalogue of recommendations, summarising the basic steps for creating a thermal simulation in accordance with the information gained in this research project. This will be carried out following VDI 3633 ff. As thermal FEM simulations in accordance with today's state of the art are very costly, such a catalogue may help to increase the expenditure of time, economic efficiency and hence also the acceptance of this development method in practice. It is also expected that it will become possible in this way to simulate complex machine structures online via the control of the machine.

热引起的位移仍然是机床部门的主要问题之一。为了补偿位移，在本研究项目的背景下开发了简化的有限元仿真模型。利用这些模型，将来可以通过数控机床控制(回路中的软件)在线进行补偿计算。在第一个供资期间，为适应有限元模拟，对机器部件进行了广泛的实验测试。然后将这些试验与仿真模型进行比较，以建立精确的预测模型，尽管这些模型的复杂性有所降低。在项目的第三年，首先对简单结构(轴承、导轨和滚珠丝杠)确定的参数在复杂结构(进给传动单元)上的适用性和可扩展性进行了检验。为了完成研究项目，计划起草一份建议目录，总结根据研究项目中获得的信息建立热模拟的基本步骤。这将在VDI 3633之后执行。由于根据当今技术状态的热有限元模拟非常昂贵，这样的目录可能有助于增加时间开销和经济效益，因此也有助于在实践中接受这种开发方法。还期望通过这种方式通过机器的控制在线模拟复杂的机器结构。