Efficient coolant lubricant application in narrow kerfs when sawing titanium alloys by simulation of thermal and mechanical fluid-solid interactions (Effi-Ti-Sim)

通过模拟热和机械流固相互作用，在锯切钛合金时在窄切口中高效应用冷却剂润滑剂 (Effi-Ti-Sim)

• 批准号: 439925537
• 负责人: Professor Dr.-Ing. Stephan Kabelac
• 金额: --
• 依托单位: Institut für Thermodynamik (IFT)
• 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/439925537?language=en
• 关键词: Efficient; coolant; lubricant; application; narrow

The aim of this project is to develop a simulation model to calculate an efficiency-optimized design of the circular sawing of titanium alloys in advance. This model has to provide the lowest possible KSS pressure and volume flow for which an optimal cooling effect, tribology and chip transport in the cutting gap for different machining conditions is achieved. In the first phase of the project, fundamental experimental and simulative investigations of mechanisms in the sawing process were carried out. The model approaches, on which the desired simulation model is based, must be rooted on a comprehensive understanding of highly dynamic chip formation, heat transport mechanisms and fluid mechanics including the coupled fluid-solid interactionsIn the second phase of the project, the separate models for chip formation, the multi-phase flow and the heat transfer in the chip space, which were developed under partially idealized conditions, are to be consolidated, parameterized and merged. The consolidation and parameterization take place via further experiments with the realized and validated test setups. The sub-models are combined using the CEL approach in ABAQUS on the one hand and by coupling ABAQUS and the CFD software OpenFOAM or FLUENT on the other. An intensive exchange with other sub-projects within the SPP is planned for both areas of responsibility.To expand the parameter field, the test rigs are operated at increased surface temperatures, so that in addition to convective vapour-liquid interactions, radiation influences can also be taken into account. The two test rigs for heat transfer, which have already provided initial results at moderate temperatures, are also intended for the further characterization of particle-laden flows in the chip space with simultaneous evaporation of the KSS.

本课题的目的是建立一个仿真模型，以提前计算钛合金圆锯的效率优化设计。该模型必须提供尽可能低的KSS压力和体积流量，以便在不同的加工条件下实现最佳的冷却效果、摩擦学和切屑在切削间隙中的输送。在项目的第一阶段，对锯切过程中的机制进行了基础实验和模拟研究。所期望的仿真模型所基于的模型方法必须植根于对高动态切屑形成、热传递机制和流体力学（包括耦合流固相互作用）的全面理解。在项目的第二阶段，将在部分理想化条件下开发的切屑形成、多相流和切屑空间传热的单独模型进行整合、参数化和合并。通过对已实现和验证的测试设置进行进一步的实验，可以进行巩固和参数化。通过ABAQUS中的CEL方法和ABAQUS与CFD软件OpenFOAM或FLUENT的耦合，对子模型进行组合。计划在这两个责任领域内与SPP内的其他子项目进行密集交流。为了扩大参数场，测试平台在更高的表面温度下运行，这样除了对流汽液相互作用外，还可以考虑辐射影响。两个热传递测试平台已经在中等温度下提供了初步结果，也用于进一步表征芯片空间中KSS同时蒸发的颗粒流动。