磨削速度和孔径比对砂轮强度与变形的影响分析  

Influences of grinding speed and on the grinding wheel’s strength and deformation

作　　者：张磊[1] 徐晓辉[2] 

机构地区：[1]山东大学机械工程学院高效洁净机械制造教育部重点实验室,山东济南250061 [2]济南工程职业技术学院基础部,山东济南250014

出　　处：《应用科技》2010年第7期35-39,共5页Applied Science and Technology

基　　金：国家重点基础研究发展规划基金资助项目(973计划)(2009CB724403);国家自然科学基金资助项目(50675121)

摘　　要：在弹性力学的基础上,建立了金属芯砂轮强度和变形的数学模型,探讨金属芯砂轮材质、内外径尺寸和磨削速度等参数对砂轮强度和变形的影响规律,得出砂轮的径向应力随着内孔与外圆半径尺寸比的增大而减小;圆周应力随着内孔与外圆半径尺寸比的增大而增大.径向位移的最大值随着内孔与外圆半径尺寸比的增大有一极小值.随着磨削速度的增大,钢制金属芯砂轮的圆周应力和径向位移的增大值高于铝合金制金属芯砂轮.Based on elasticity, mathematical models of grinding wheel＇s stress and deformation are studied. The influences of wheel material, size of internal and external diameters and grinding speed on wheel strength and deformation are analyzed. Conclusions are drawn that radial stress is decreasing with increasing of the aperture ratio, while circular stress is rising with increasing of the ratio. Besides, with the rising of the ratio, there is a minimum one in radial displacement maximum values. The increases of circular stress and radial displacement of the steel wheel are larger than that of aluminum alloy wheel when grinding speed is rising.

关 键 词：磨削加工 立方氮化硼砂轮 强度 变形 

分 类 号：TG580[金属学及工艺—金属切削加工及机床]