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Influence of the grinding wheel topography on the formation of the thermo-mechanical stress collective in the grinding process

砂轮形貌对磨削过程中热机械应力集中形成的影响

基本信息

批准号：
350725742
负责人：
Professor Dr.-Ing. Thomas Bergs, since 7/2019
金额：
--
依托单位：
Werkzeugmaschinenlabor - WZL
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2017
资助国家：
德国
起止时间：
2016-12-31 至 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/350725742?language=en
关键词：
Influence grinding wheel topography formation

项目摘要

The state of the research and own preliminary studies reveal, that currently a major lack of the knowledge about the influence of the volumetric grinding wheel composition and the resulting grinding wheel topography on the shape of the thermo-mechanical stress collective, acting on an workpiece surface, exists. So a scientific, quantitative statement about the influence of the volumetric composition of a grinding wheel on the boundary zone of a workpiece is not possible. Therefore a detailed and quantitative description of the grinding wheel topography by means of qualified parameters is required to identify the relationship between the volumetric grinding wheel composition and the thermo-mechanical stress collective acting on a workpiece boundary zone. Due to limited measurement methods and inadequate parameters for describing the topography, the necessary analysis of the grinding wheel surface is restricted.The aim of the project is to model the influence of the grinding wheel topography to the thermo-mechanical stress collective, which acts on the workpiece boundary zone during surface grinding processes. For this purpose, an empirical analytical explanation model is developed which enables the prediction of the thermo-mechanical stress collective acting on the workpiece boundary zone by depending on the three dimensional topography parameters. First, the necessary measuring methods for the identification of the thermo-mechanical stress collective during the grinding process are adapted and constructed. To detect the necessary cause-effect-relationships, different grinding wheel topographies are designed pointedly and grinding experiments are carried out. Following the topography-dependent thermo-mechanical stress collectives, which act on the workpiece boundary zone during a surface grinding process, are explored highly dissolved over the contact zone between grinding wheel and workpiece for the first time. The topographies of the used grinding wheels are analyzed regarding the height- , the material ratio- and the three-dimensional topography characteristics. Between the detected topography-dependent thermal and mechanical stress profiles and the obtained three-dimensional topography parameters cause-effect-relationships are derived. Based on these relationships respectively one quantitative model about the influence of the three dimensional topography parameters on the form of the thermal stress profile and the mechanical stress profile are derived.In further work it is planned to use the developed methodology to determine the dependence of the process behavior of additional grinding wheel specifications, like metallic- or resin bonded grinding wheels. In summary, a quantitative model for the contact zone resolved dependence of the thermo-mechanical stress collective of the grinding wheel specification is sought in both research periods.

研究的状态和自己的初步研究表明，目前主要缺乏关于体积砂轮成分和所得砂轮形貌对作用于工件表面的热机械应力集合的形状的影响的知识。因此，关于砂轮的体积成分对工件边界区域的影响的科学、定量的陈述是不可能的。因此，需要借助于合格的参数对砂轮形貌进行详细和定量的描述，以确定体积砂轮成分与作用在工件边界区域上的热机械应力集合之间的关系。由于测量方法的局限性和用于描述砂轮表面形貌的参数的不足，限制了对砂轮表面进行必要的分析，本项目的目的是模拟砂轮表面形貌对热机械应力集中的影响，该应力集中作用于表面磨削过程中的工件边界区域。为此，开发了一种经验分析解释模型，该模型能够通过依赖于三维形貌参数来预测作用在工件边界区上的热机械应力集体。首先，在磨削过程中的热机械应力集体识别的必要的测量方法进行了调整和建设。为了检测必要的因果关系，有针对性地设计了不同的砂轮形貌，并进行了磨削实验。本文首次研究了磨削过程中作用于工件边界区的热机械应力集中在砂轮与工件接触区的高度溶解现象。从砂轮高度、材料比和三维形貌特征等方面分析了所用砂轮的形貌。之间检测到的地形依赖的热应力和机械应力分布和获得的三维地形参数的因果关系。基于这些关系分别一个定量模型的三维形貌参数的热应力分布和机械应力profile.In进一步的工作中，它计划使用开发的方法来确定依赖的工艺行为的形式上的热应力分布和机械应力profile.In进一步的工作，如金属或树脂结合剂砂轮的砂轮规格。总之，在这两个研究期间，寻求接触区解决砂轮规格的热机械应力集体的依赖性的定量模型。