机械5

摘要 为摩托车轮毂液态模锻液压机设计了液压控制系统，该主机最大工作负载为3150kN。主机是由工作台、上横梁、4根立柱、滑块、锁紧螺母、打料机构、调整螺母、主液压缸和顶出液压缸等部分组成。液压机的工艺流程：主缸快速下行→主缸工进加压→主缸保压延时→主缸回程→顶出缸顶出→顶出缸保压延时→顶出缸释压→取锻件→顶出缸回退。 通过对液态模锻液压机的主要参数的选定和计算，对主要工作部件工况分析，制定了液压系统的总体设计方案，主要包括调速回路、保压回路、卸荷回路，绘制了整体的液压系统原理图。对液压机的液压系统中的液压元件进行选型设计及计算，确定了液压缸的基本尺寸，选定了LD50A20S1型插装阀、YF-F80H型溢流阀等液压元件、选定了A2F500液压泵、选定了Y225M-2型电动机，而且对系统的的性能进行了验算，通过对系统的压力和温升的验算，本设计的液压系统满足模锻液压机的基本设计要求：系统最大工作压力值为25MPa，主缸快速下行速度为0.2m/s，工进速度为0.008m/s，快速回退速度为0.15m/s，顶出缸顶出速度为0.02m/s，回退速度为0.112m/s。 关键词：液态模锻；液压机；液压控制系统；设计 ABSTRACT Hydraulic co
ntrol system is desig
ned for the liquid die forgi
ng hydraulic press of the motorcyclewheel hub. The maximumworki
ng load of the machi
ne is 3150kN. The mai
n machi
ne is composed of aworki
ng table, a
n upper beam, 4 colum
ns, a slidi
ng block, a locki
ng
nut, a material feedi
ng mecha
nism, a regulati
ng
nut, a mai
n hydraulic cyli
nder a
nd a hydraulic cyli
nder. Hydraulic machi
ne process: master cyli
nder dow
n quickly, the mai
n cyli
nder i
nto the pressi
ng a
nd master cyli
nder pressure mai
ntai
ni
ng delay, master cyli
nder retur
n to top ta
nk top out, the top out of the cyli
nder pressure mai
ntai
ni
ng delay, ejecti
ng cyli
nder release pressure, taki
ng forgi
ng, lifti
ng cyli
nder rollback. Through the selectio
n a
nd calculatio
n of the mai
n parameters of liquid metal forgi
ng hydraulic machi
ne, theworki
ng co
nditio
n of the mai
nworki
ng parts a
nalysis, formulate the overall desig
n scheme of the hydraulic system, i
ncludi
ng the speed co
ntrol loop, pressure loop, a
nd u
nloadi
ng loop, re
nderi
ng the pri
nciple diagram of the hydraulic system of thewhole. 0.112m/s 0.008m/s meet system, hydraulic pump, hydraulic overflowvalve, thevalve cartridge desig
n of hydraulic press hydraulic system of hydraulic compo
ne
nts selectio
n a
nd calculatio
n to determi
ne the hydraulic cyli
nder of the basic size, selected the LD50A20S1 YF-F80H eleme
nt selected A2F500 selected Y225m-2 type electric motor but also for the performa
nce of checki
ng the system pressure a
nd temperature rise calculatio
n, the desig
n of the hydraulic system of forgi
ng hydraulic press the basic desig
n requireme
nts: the system maximumworki
ng pressure of 25MPa a
nd cyli
nder fast dow
nli
nk speed 0.2m/s, i
ndustry a
nd trade i
nto the speed of fast retur
n rate of 0.15m/s, ejector cyli
nder top speed for 0.02m/s retractio
n speed. Keywords: Liquid die forgi
ng, Hydraulic press, Hydraulic co
ntrol system, Desig
n 目录 摘要I ABSTRACT II 前言1 第1章液态模锻液压机总体方案设计2 1.1液态模锻液压机的结构和工艺流程2 1.1.1液态模锻液压机的结构2 1.1.2液态模锻液压机的工艺流程3 1.2明确液压系统设计要求3 1.2.1液态模锻液压机的技术参数3 1.3分析系统工况和确定系统的主要参数3 1.3.1主缸的速度和负载分析3 1.3.2顶出缸的速度和负载分析6 1.4选定设计的方案和设计液压控制系统8 1.4.1液压机系统选择调速回路和供油的方式8 1.4.2液压系统选择速度换接方法8 1.4.3液压系统的油路分析说明8 1.4.4拟定液压系统原理图10 1.4.5液压控制系统电磁铁运行顺序表12 第2章液态模锻液压机液压系统设计13 2.1液压系统基本参数的计算和液压元件的设计13 2.1.1计算液压缸的基本尺寸13 2.1.2液压系统流量的计算14 2.1.3液压泵额定压力、流量分析计算及泵选型设计15 2.1.4电动机的选择17 2.1.5液压控制阀的选择18 2.1.6液压油管和管接头选择20 2.1.7确定油箱的有效容积21 2.1.8过滤器的选择22 2.2验算液压系统性能22 2.2.1主缸各工况压力损失验算22 2.2.2顶出缸各工况压力损失验算25 2.2.3液压系统温升的验算26 2.2.4冷却器的选型27 第3章结束语29 致谢30 参考文献31