Research Of Evaluation Methods Of Grinding Wheel Surface Topography And Realization Of The Evaluation System

Grinding wheel is the most main type of tools in grinding processing, grinding grain morphology characteristics of abrasive grains have important influence on the mode of grinding and the machining quality of the workpiece. Surface morphology of grinding wheel can real reflect the tribological properties of the grinding surface, which is important basis for assessing the grinding wheel wear state and predicting the tendency of the grinding wheel wear. However, the existing surface topography detection equipment provided characteristic parameters about the grinding wheel surface topography can not enough give the all-round comprehensive surface morphology characteristics, thus it is difficult to provide comprehensive reference to production and processing. Therefore, conducting the further research of evaluation methods the grinding wheel surface topography, and establishing a comprehensive parametric evaluation system, which will help to promote the grinding machining technology level.This paper is based on the research of grinding wheel surface topography with evaluation methods, it combines with the characteristics of grinding wheel topography and hot spot characteristics of attention in mold molding and grinding processing. On the basis of the definition and analysis of evaluation parameters, a set of grinding wheel evaluation parameters is integrated, and a evaluation system for the grinding wheel surface topography is built. In this paper, the main researches includes:(1)Drawing on international standards ISO25178-2(Geometrical Product Specifications-Terms, definitions and surface texture parameters), the related parameters based on arithmetic average center line datum are defined, it is concluded that these parameters can describe the characteristics of the grain explosion height and the grain density of the grinding wheel through the analysis. The arithmetic average central line datum plane is determined by the least square method and the concrete implementation process of the evaluation parameters under this datum is expounded.(2)The related parameters which are based on the bond datum are defined and analyzed, and the bond datum is determined. Two kinds of grain edge detection of grinding wheels methods are put forward, the rapid extraction of grain edge and the fuzzy C-means clustering analysis based on ant colony algorithm(AC-FCM) for grain edge extraction. The former mainly uses each sampling point height of the original morphology to set threshold to distinguish between abrasive grain and the bond, to achieve the rapid detection and extraction. The latter uses ant colony algorithm to optimize the initial clustering center, then uses fuzzy C-means clustering algorithm to determine the fuzzy matrix and select appropriate threshold to distinguish grain and the bond, finally determines the grain edge. On this basis, the concrete implementation process of the evaluation parameters under the bond datum is expounded.(3)Specially for grinding wheel surface topography evaluation software system was developed based on Microsoft Visual VC++6.0 platform. It chooses different grinding wheel surface topography measurement data to conduct the example analysis of the relevant parameters under two kinds of evaluation datum.