Modelling of the cooling effect in tool grinding under consideration of process-related uncertainties

考虑工艺相关不确定性的工具磨削冷却效果建模

• 批准号: 439916647
• 负责人: Dr.-Ing. Benjamin Bergmann
• 金额: --
• 依托单位: Zentrum für Technomathematik (ZeTeM)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/439916647?language=en
• 关键词: Modelling; cooling; effect; tool; grinding

The grinding process plays a central role in the process chain for the production of solid carbide tools for geometrically determined machining. It defines the geometric shape of the workpiece, influences the substrate properties and causes up to 60 % of the costs in tool production. The influence of the cutting conditions on the resulting workpiece quality has already been investigated in numerous research projects, while fluid dynamic processes of the cooling lubricant in the contact zone and their effects on the thermal load of the workpiece are still largely unknown. In order to close this knowledge gap, the aim of the project is to investigate a multi-scale material removal fluid simulation for tool grinding, taking into account process-related uncertainties. The objective is based on the hypothesis that the combination of micro- (e.g. grinding wheel topography, physical properties of the cooling lubricant) and macroscopic (e.g. cutting conditions) effects during grinding significantly influence the effectiveness of cooling and lubrication in the process. The general knowledge of the interactions and their simulation form the basis for damage-free processing at higher productivity. At the same time, it is assumed that the microscopic processes are subject to unpredictable deviations, which must be taken into account in form of uncertainties in the simulation. A special focus is on the fuzzy calculation of the cooling lubricant distribution and the resulting thermal load on the workpiece. With this objective, the project addresses questions concerning the simulation of multi-scale problems, the modelling of the heat transfer into the cooling lubricant and the corresponding heat transport. In addition, the consideration of uncertainties in production processes is addressed. The methods to be researched have a fundamental character and can therefore be transferred to other applications in cooperation with other projects of the priority program 2231.

磨削工艺在整体硬质合金刀具的生产工艺链中起着核心作用，用于几何形状确定的加工。它定义了工件的几何形状，影响了基体性能，并导致高达60%的工具生产成本。切削条件对工件质量的影响已经在许多研究项目中进行了研究，而接触区冷却润滑剂的流体动力学过程及其对工件热负荷的影响在很大程度上仍然是未知的。为了缩小这一知识差距，该项目的目的是研究一种多尺度的材料去除流体模拟工具磨削，考虑到过程相关的不确定性。其目的是基于这样的假设，即在磨削过程中微观（例如砂轮形貌、冷却润滑剂的物理性质）和宏观（例如切削条件）效应的组合显著影响过程中冷却和润滑的有效性。相互作用及其模拟的一般知识构成了以更高生产率进行无损伤加工的基础。同时，假设微观过程受到不可预测的偏差的影响，这必须以模拟中的不确定性的形式考虑。一个特别的重点是冷却润滑剂的分布和工件上的热负荷的模糊计算。为了实现这一目标，该项目解决了有关多尺度问题的模拟，冷却润滑剂的热传递建模以及相应的热传输问题。此外，生产过程中的不确定性的考虑得到解决。待研究的方法具有基本特征，因此可以与优先级程序2231的其他项目合作转移到其他应用中。