大型水压机阀芯驱动系统凸轮升程曲线设计  

Design of cam lifting profiles used to drive spool system in large hydraulic press

作　　者：陈玲[1] 谭建平[1] 杨俊[1] 陈晖[1] 

机构地区：[1]中南大学机电工程学院,湖南长沙410012

出　　处：《锻压技术》2013年第2期85-89,共5页Forging & Stamping Technology

基　　金：国家高技术研究发展计划(863)专项经费资助项目(2007AA04Z417);"高档数控机床与基础制造装备"国家科技重大专项资助项目(2009ZX04005-031);流体动力与机电系统国家重点实验室开发基金资助项目(GZKF-201023)

摘　　要：针对大型水压机阀芯驱动系统中凸轮顶杆机构所受侧向力巨大和瞬变的特点,提出一种适合于该特点的凸轮轮廓曲线设计方法,该方法通过寻找最优的圆弧曲线轮廓使凸轮的压力角在阀芯开启力最大时具有较小的值。将该方法应用于300MN模锻水压机阀芯驱动系统的凸轮设计,通过建立阀芯驱动系统的模型,对比了最优圆弧凸轮和直线轮廓凸轮对系统动态特性的影响,结果表明:最优圆弧凸轮阀芯驱动系统的液压缸驱动降低了22%,阀芯开启力下降了5kN,开启的速度更加平稳,设备运行更加稳定,使用寿命得到了极大的提高。Considering the huge and transient lateral force that the cam followers institutions suffered in the spool drive system of large hydraulic press, a new cam profile curve design method was presented. This method tries to find the optimal arc curved contour to ensure a smaller value of the pressure angle of cam when the opening force of the spool is the maximum. The method was applied in the cam design of the spool drive system in 300 MN forging hydraulic press. The effects on system dynamics of the optimal arc cam and straight line contour cam were compared through the establishment of the spool drive system model. The results show that the drives of hydraulic cylinder in the spool driving system with the optimal arc cam can be reduced by 22%, the opening force declines 5 kN, the opening speed is smoother, the operation state is more stable, and the service life of the equipment is greatly prolonged.

关 键 词：大型水压机 阀芯驱动系统 凸轮顶杆机构 凸轮轮廓曲线 

分 类 号：TG315.4[金属学及工艺—金属压力加工]