叶片式摆动液压油缸的叶片结构优化

摘要

叶片式液压摆动油缸具有结构紧凑、机械效率高、转矩输出平稳、操控性好、便于隔离外部灰尘等优点,叶片的结构参数对定子乃至整个摆动油缸的体积、重量有极大的影响.综合分析了叶片结构优化的约束条件,考虑到作用在叶片上的液压力产生的转矩应大于所需转矩,将摆动油缸的定子视为单层内压圆筒形压力容器,在满足转子和定子强度条件的前提下,以定子和摆动油缸质量最轻为优化目标,建立了矩形叶片的结构优化模型,结合实例进行了叶片结构优化.本优化模型有助于进行叶片式摆动液压油缸的结构设计与优化.%Experimental investigation of surface roughness was performed in high speed turning of hardened AISI P20 steel with PCBN tool,Optimal cutting parameters were found to improve the machining performance based on design of experiment.Simulations were done to describe the relationship between surface roughness and cutting parameters with the proposed predictive model of surface roughness.Simulations showed that increased cutting speed and nose radius help in improving the surface roughness,whereas increased feed rate deteriorate the surface roughness noticeably.At the same time, feed rate is found as the most influential parameter followed by nose radius on surface roughness.The contribution of cutting speed is also important, and the effect of depth of cut is very slight.