液压课程设计任务书（一）设计课题设计一台卧式单面多轴钻孔机床的液压传动系统，有三个液压缸，分别完成钻削（快进、工进、快退）、夹紧工件（夹紧、松开）、工件定位（定位、拔销）。其工作循环为：定位夹紧快进工进快退原位停止→松开，如1图所示：（二）原始数据1.主轴数及孔径：主轴6根，孔径Ø14mm;2.总轴向切削阻力：20000N3.运动部件重量：30000N4.快进、快退速度：6m/min;5.工进速度：0.02~~1.2m/min6.行程长度：250mm7.导轨形式及摩擦系数：平导轨，18.加速、减速时间：大于0.2秒9.夹紧力：4000N10.夹紧时间：1~2秒11.夹紧液压缸行程长度：16mm（三）系统设计要求1.夹紧后在工作中如突然停电时，要保证安全可靠，当主油路压力瞬时下降时，夹紧缸保持夹紧力；2.快进转工进时要平稳可靠3.钻削是速度平稳，不受外载干扰，孔钻透时不前冲（四）最后提交内容（电子稿和打印稿各一份）1.设计说明书各一份2.系统原理图一份，含电磁铁动作顺序表，主要元件明细表3.液压阀块二维CAD零件图（A3，比例1：1或者1：2）4.液压阀块三位实体图5.可选部分，包含液压阀块，阀块安装件的三维实体图2目录液压课程设计任务书···················································································I1工况分析································································································11.1动作要求分析··················································································11.2设计要求及工况分析··············································································11.3负载图和速度图的绘制·········································································12液压系统方案设计····················································································22.1确定液压泵类型及调速方式·····································································22.2选用执行元件······················································································22.3快速运动回路和速度换接回路··································································22.4换向回路的选III择···················································································22.5定位夹紧回路的选择·············································································22.6动作换接的控制方式选择·······································································22.7液压基本回路的组成·············································································33液压系统的参数计算································...
