Ⅴ型浮动支承式电磁无心夹具的定位误差是指工件中心位移在砂轮实践磨削方向的投影。本文运用解析几何理论,建立了定位误差的数学模型,即定位误差∑=△cos(η+γ),式中△—位移大小;η—工件中心位移方向角;γ—实际磨削方向角。并讨论了有关参数对定位误差的关系。附图6幅, 参考文献6篇。 Ⅴ floating support electromagnetic centerless fixture positioning error refers to the center of the workpiece in the grinding wheel grinding direction of the projection. In this paper, the analytic geometry theory is used to establish the mathematical model of the positioning error, that is, the positioning error Σ = △ cos (η + γ), where △ - displacement size; η- workpiece center displacement direction angle; γ- actual grinding direction angle. The relationship between the parameters and the positioning error is also discussed. Figure 6, reference 6 articles.