300MN巨型水压机同步卸载控制策略的研究  

Synchronized unloading control strategy of 300MN large scale water press

作　　者：周育才[1,2] 刘少军[1] 赵惠敏[2] 刘忠伟[1] 邓奕[1] 

机构地区：[1]中南大学机电工程学院,湖南长沙410083 [2]长沙理工大学能动学院,湖南长沙410076

出　　处：《锻压技术》2008年第6期116-119,共4页Forging & Stamping Technology

基　　金：国家973项目资助(2005CB724102);湖南省自科基金资助(06JJ20045)

摘　　要：300MN巨型水压机的动梁在驱动系统卸载时由于偏载变化速度较快,从而产生比加载过程中大得多的反向偏转角,可能造成立柱损伤。由于在卸载过程中锻件的变形抗力中心变化很小,因此可采用压力传感器间接测量偏载,从而实现驱动系统卸载时对动梁液压位置保持系统进行同步卸压。仿真结果表明,在卸载速度为加载速度的3倍工况下,动梁最大偏转角仅为加载时的10%。The poles in the 300 MN large-scale water press is properly damaged by antiverse eccentric angle of water press＇s moving beam, which is much bigger than the eccentric angle created in loading course, brought by rapidly changing eccentric load during the time that the driving system is discharging. Eccentric load could be indirectly meas- ured by pressure sensor because center of forging blank deforming drag changes little, consequently moving beam position holding system could be discharged simultaneously when the driving system was discharged. The results of simulation and experiment both show that this method is very useful to decrease the maximum deflection angle when driving system is in the discharging state. Simulation results show that the largest eccentric angle in unloading course is not more than one tenth of it when in loading course even if the unloading velocity is three time faster than that in loading course.

关 键 词：巨型水压机 同步卸载 驱动系统 

分 类 号：TG315.4[金属学及工艺—金属压力加工]