贯穿式无心磨削静态成圆稳定性模型与实验验证  

Model and experimental verification of static rounding stability in through-feed centerless grinding

作　　者：刘洋 马可[1] 李晨光 LIU Yang;MA Ke;LI Chenguang(College of Mechanical Engineering,Hohai University,Changzhou 213000,CHN)

机构地区：[1]河海大学机电工程学院,江苏常州213000

出　　处：《制造技术与机床》2024年第7期63-70,共8页Manufacturing Technology & Machine Tool

基　　金：国家自然科学基金面上项目“基于时变可靠性分析的扑动-扭转-折叠复杂耦合驱动扑翼飞行器设计及控制研究”(52275285)。

摘　　要：为了提升具体加工条件下贯穿式无心磨削试磨中设置参数配置效率,文章建立了反映磨削参数与各阶次谐波误差增长之间定量化关系的静态成圆稳定性模型并对其进行了数值仿真。首先以切入式无心磨削为研究对象,建立了静态成圆稳定性条件。然后以工件与导轮之间的理想线接触为要求,在三维空间内对工件与磨削系统之间几何关系进行分析,并借助齐次坐标变换法将相关参量统一于同一坐标系中进行表征,以此推导出能够求解不同轴向位置处磨削角和工件与导轮接触角的数学表达式,并与切入式无心磨静态成圆稳定性条件相结合,由此建立了贯穿式无心磨削静态成圆稳定性模型。最后对稳定性模型进行了实验验证。实验结果显示,工件各阶次谐波幅值平均下降率与静态成圆稳定性模型计算的各阶次谐波稳定性值呈正相关。表明了模型可以有效预测出实际加工中各阶次谐波幅值的变化情况。In order to improve the efficiency of parameter configuration in through-feed centerless grinding test under specific machining conditions,a static rounding stability model reflecting the quantitative relationship between grinding parameters and the growth of each order harmonic error is established and numerically simulated.Firstly,the static circular stability condition is established by taking plunge centerless grinding as the research object.Secondly,the geometric relationship between the workpiece and the grinding system is analyzed in three-dimensional space according to the requirement of the ideal line contact between the workpiece and the guide wheel,and the relevant parameters are characterized in the same coordinate system by means of the homogeneous coordinate transformation method,so as to derive mathematical expressions that can solve the grinding angle and the contact angle between the workpiece and the guide wheel at different coaxial positions.The static rounding stability model of through-feed centerless grinding is established by combining with the static rounding stability condition of the plunge centerless grinding.Finally,the stability model is verified by experiment.The experimental results show that the average decline rate of each order harmonic amplitude of the workpiece is positively correlated with the stability value of each order harmonic calculated by the static rounding stability model.It is shown that the model can effectively predict the variation of each order harmonic amplitude in actual processing.

关 键 词：贯穿式无心磨削 静态成圆稳定性 谐波误差 齐次坐标变换法 

分 类 号：TH16[机械工程—机械制造及自动化]