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Modelling and simulation of the NC grinding process for the controlled generation of workpiece surfaces under consideration of tool topography and wear

在考虑刀具形貌和磨损的情况下，对数控磨削过程进行建模和仿真，以控制工件表面的生成

基本信息

批准号：
324889278
负责人：
Professor Dr.-Ing. Dirk Biermann
金额：
--
依托单位：
Informatik XIV- Lehrstuhl Software-Engineering
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/324889278?language=en
关键词：
Modelling simulation NC grinding process

项目摘要

The aim of this research is a simulation-based analysis and prediction of workpiece topographies taking the tool topography and the tool wear in NC shape grinding into account. The prediction of the workpiece topographies allows for the controlled manufacturing of functional surface properties, e.g. friction behavior, depending on the tool topography and the process parameter values. With respect to the machining of free formed surfaces and the difficult-to-machine workpiece materials used for dies and molds, the wear behavior of the small grinding tools results in shape and quality errors. The forming process of high strength steel, which becomes more and more important for the weight reduction of automobiles, decreases the lifetime of the forming tools due to the properties of those materials. By applying thermally sprayed, wear resistant coatings, the wear behavior of the forming tools can be improved. In order to structure the surface of the coated forming tools for controlling the material flow during the forming process, the simulation system has to be extended by a new workpiece model for the representation of inhomogeneous workpiece materials. This extension will be used to analyze the grinding process of arc-sprayed coatings. The developed simulation system can be used to optimize process strategies and parameter values during the process planning as well as the planning of the dressing processes for compensating tool wear. The developed models for the surface structuring and the tool wear will be validated by experiments.

本研究的目的是在考虑刀具形貌和刀具磨损的情况下，对数控形状磨削中的工件形貌进行基于仿真的分析和预测。工件地形的预测允许控制功能性表面特性的制造，例如摩擦行为，取决于工具地形和工艺参数值。对于自由曲面和难加工的模具工件材料的加工，小磨具的磨损行为导致形状和质量误差。高强度钢在汽车轻量化中发挥着越来越重要的作用，但由于其自身的特性，高强度钢的成形工艺降低了成形工具的使用寿命。通过应用热喷涂耐磨涂层，可以改善成形工具的磨损性能。为了在成形过程中对涂层成形工具的表面进行组织以控制材料流动，必须对仿真系统进行扩展，采用新的工件模型来表示非均匀工件材料。该扩展将用于分析电弧喷涂涂层的磨削过程。所开发的仿真系统可用于优化工艺规划中的工艺策略和参数值，以及补偿刀具磨损的修整工艺规划。所建立的表面结构模型和刀具磨损模型将通过实验进行验证。