CAJ | 학술논문

根据点磨削原理和技术特征,讨论薄层CBN砂轮侧边实际接触区在材料去除过程中的作用,建立快速点磨削侧边接触区几何模型,对侧边接触区工件等效直径、几何与动态接触弧长、单颗磨粒切削深度、平均切屑断面积等接触层参数进行数学建模与解析.结合快速点磨削加工试验研究结果,分析侧边接触层参数对快速点磨削过程的影响机理及薄层CBN点磨削砂轮的磨损特征及规律.结果表明,点磨削过程中材料的去除主要是在侧边接触区内完成,薄层CBN点磨削砂轮的最大磨损速率发生在砂轮侧边最大直径处.
근거점마삭원리화기술특정,토론박층CBN사륜측변실제접촉구재재료거제과정중적작용,건립쾌속점마삭측변접촉구궤하모형,대측변접촉구공건등효직경、궤하여동태접촉호장、단과마립절삭심도、평균절설단면적등접촉층삼수진행수학건모여해석.결합쾌속점마삭가공시험연구결과,분석측변접촉층삼수대쾌속점마삭과정적영향궤리급박층CBN점마삭사륜적마손특정급규률.결과표명,점마삭과정중재료적거제주요시재측변접촉구내완성,박층CBN점마삭사륜적최대마손속솔발생재사륜측변최대직경처.
Based on the principle and technical characteristcs of point grinding process, the function of the side contact area of the thin CBN point-grinding wheel in material removal process is discussed, and the geometry and parameters models of the side contact area are established. Mathematic modeling and analysis are carried out for the side contact layer parameters, such as the equivalent workpiece diameter, the geometric and dynamic contact arc length, cutting depth of single abrasive grain and average cross-sectional area of chips. The grinding experiment is carried out to study the mechanism of effect of side contact layer parameters on the quick point grinding process and the wear characteristic and rule of thin CBN point-grinding wheel. It is found that the material removal is mainly completed in the side contact layer and the maximum wear rate of the thin CBN point-grinding wheel occurs at the largest circumference of wheel side in the point grinding process.