Abstract
The grinding process is used for both high-performance machining and surface finishing of hardened steel. In addition to the grinding parameters and the grinding fluid supply, the topography of the grinding wheel mainly determines the grinding process behavior and the grinding process result. An alteration of the topography by a variation of the volumetric composition of the grinding wheel, by a variation of the grinding wheel conditioning, or by wear causes a change in the contact conditions. The state of the art shows a substantial knowledge deficit about the influence of the volumetric grinding wheel composition and the resulting grinding wheel topography on the thermo-mechanical stress collective acting on the workpiece external zone. Thus, it is not possible to make a quantitative statement about the influence of the volumetric grinding wheel composition on the external zone properties of a component after grinding. Therefore, the aim of the current research is an empirical-analytical model for the prediction of the thermo-mechanical stress collective as a function of the grinding wheel topography. For this purpose, a methodology is developed, which enables the prediction of the topography-dependent thermo-mechanical load in a grinding process. Therefore, the topography is characterized by means of quantitative parameters and the main influencing variables on the grinding process behavior are investigated. The findings are used to analyze the influence of a change in the topography on the grinding temperature and the grinding force. The obtained results are summarized and are used to explain the thermo-mechanical stress collective as a function of the grinding wheel topography.
Highlights
The topography of a grinding wheel represents a functional surface
The aim of the research was to investigate the influence of the grinding wheel topography on the thermo-mechanical stress collective
The aim of the investigations was to identify the influence of the grinding wheel topography on the thermo-mechanical stress collective during the grinding process, and to determine the topography parameters by which the influence of the topography on the thermo-mechanical stress collective can be described quantitatively
Summary
The topography of a grinding wheel represents a functional surface. It is part of a tribological system and causes a stress collective during the engagement with the workpiece material. It determines the chipping of the workpiece material, and the stresses, such as mechanical loads and temperatures. The grinding wheel topography is dependent on the grinding wheel specification [1,2]. It is strongly influenced by the grinding-wheel conditioning process and geometrical changes during the grinding process due to wear [3,4]. The characteristics of the topography determine the machining behavior in the grinding process, so it must be taken into account when designing grinding processes [5]
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