机械5

设计了液压缸的尺寸、热压机本体，拟订了液压原理图，并且按压力和流量的大小选择了液压泵，电动机，控制阀，过滤器等液压元件和辅助元件。最后还使用AutoCAD软件绘制了该热压机的装配图和主要零件图。 胶合板热压机是胶合板生产流程中的主要设备之一，是用来对涂胶组合后板坯进行热压胶合的设备，本次热压机采用三梁四柱式，此结构应用广泛，最大热压力为400KN，通过更换模具可适应多种不同形状尺寸零件的加工，也可进行冲压、挤压等加工，具有很广的使用范围。 三梁四柱式热压机包括液压缸、横梁、立柱及充液装置等。动力机构由油箱、高压泵、控制系统、电动机、压力阀、方向阀等组成。热压机通过泵和油缸及各种液压阀实现能量的转换，调节和输送，完成各种工艺动作的循环。 关键词：热压机；液压缸；液压系统 Abstract I
n this paper, wood plastic composite moldi
ng machi
ne desig
n , pressi
ng machi
ne with three beam four-post , this structure is widely used ,
nomi
nal force desig
ned to 400KN, through the replaceme
nt of mold ca
n be adapted to a variety of differe
nt shapes a
nd sizes of parts processi
ng, ca
n also be stampi
ng, extrusio
n processi
ng, with a very wide ra
nge. Three -beam four- pressi
ng machi
ne i
ncludes hydraulic cyli
nders, beams, colum
ns a
nd liquid-filled devices. Power sector by the fuel ta
nk, high pressure pumps, co
ntrol systems , motors, pressure valves, directio
nal valve. Pressi
ng machi
ne achieved through a variety of pumps a
nd hydraulic cyli
nders a
nd valves of e
nergy co
nversio
n, regulatio
n a
nd tra
nsport , completi
ng the cycle of various craft moveme
nt. The pressi
ng machi
ne compact structure , se
nsitive a
nd reliable , high speed , low e
nergy co
nsumptio
n, low
noise , pressure a
nd stroke ca
n be adjusted withi
n a specified ra
nge, simple operatio
n. I
n this desig
n , through access to a lot of literature, desig
n size , pressi
ng machi
ne body hydraulic cyli
nders , hydraulic schematics draw
n up , a
nd accordi
ng to the size of the selected pressure a
nd flow hydraulic pumps, motors, co
ntrol valves, hydraulic filters, etc. compo
ne
nts a
nd auxiliary compo
ne
nts. Fi
nally, the use of AutoCAD software to draw a diagram of the pressi
ng machi
ne assembly a
nd major parts diagram . Keywords:Pressi
ng machi
ne ; Hydraulic cyli
nder ;Hydraulic system 目录 摘要I Abstract II 第一章绪论1 1.1研究背景及意义1 1.2压力机概述1 1.2.1压力机发展的概况1 1.2.2压力机工作原理2 1.3主要研究内容2 第二章总体方案设计3 2.1总体方案选定3 2.1.1设计要求3 2.1.2总体结构选定3 2.1.3总体技术参数选定4 2.2工况分析4 2.2.1工作循环分析4 2.2.2负载分析4 第三章液压缸设计7 3.1液压缸的基本结构设计7 3.1.1液压缸的类型7 3.1.2钢筒的连接结构7 3.1.3缸底结构7 3.1.4油缸放气装置7 3.1.5缓冲装置8 3.2缸体结构的基本参数确定8 3.2.1液压缸参数8 3.2.2顶出缸参数8 3.3液压缸设计与校核9 3.3.1筒壁厚9 3.3.2缸底厚度10 3.3.3缸筒端部法兰厚度10 3.3.4连接螺栓12 3.3.5活塞杆直径d的校核13 第四章液压系统设计及元件选择14 4.1液压系统方案设计14 4.1.1快速行程方式14 4.1.2调速方式14 4.1.3保压方式14 4.1.4泄压换向方法14 4.1.5互锁控制回路15 4.2拟定液压系统原理图15 4.3选择液压元件17 4.3.1选择液压泵和确定电动机功率17 4.3.2选择液压控制阀17 4.3.3选择辅助元件18 4.4液压系统性能验算19 第五章热压机的安装、维护与保养21 5.1热压机的安装21 5.2热压机的维护与保养21 5.2.1维修保养21 5.2.2安全操作规程22 总结23 参考文献24 致谢25