【摘要】 为解决平面二次环面蜗杆数控磨床加工中出现形位超差和精度不足的问题,通过研究磨床的整体结构和转台工况确定了扇形静压转台的主体结构方案和设计参数,通过理论计算推导出承载力与位移率和面积比的关系和刚度与压力比与面积比的关系,根据面积比最优计算得到油垫的承载力和刚度,并利用FLUENT软件分别对口字型和工字型油腔结构的油垫进行流体力学仿真分析,证明计算得到的油腔尺寸参数可以使转台产生足够的承载力,满足磨床设计要求,分析了矩形油垫中不同的油腔内部结构,得到口字型油腔结构比工字型油腔结构产生的更大承载能力且承载更均匀,油腔内部无内壁阻隔更适合于静压油腔选型的结论。更多还原

【Abstract】 In order to solve the problem of shape and position overshoot and insufficient precision in grinder processing,the structure of the grinder and the working condition of the hydrostatic hydrostatic rotary table were studied. Through the mathematical modeling of the parameters in the hydrostatic support,such as oil film bearing capacity,oil film stiffness,area ratio and displacement rate,the relationship between these parameters was found. The fluid analysis software FLUENT is used to simulate the oil pad,which proves that the theoretical calculation of the oil cavity size parameter can make the rotary table generate sufficient bearing capacity to meet the design requirements of the grinding machine. By analyzing the internal structure of different oil chambers,the result shows that the Square-shaped oil chamber structure has greater bearing capacity and more uniform load than the H-shaped oil chamber structure,and the structure of no inner wall barrier inside the oil chamber is more suitable for static pressure oil chamber selection.更多还原