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Abstract：
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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 measured 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.
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Funds：
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国家973项目资助(2005CB724102);;
湖南省自科基金资助(06JJ20045)
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AuthorIntro：
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Reference：
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[1]谭建平,刘昊.溢流型液压位置保持系统的研究和应用[J].机械工程学报,2004,40(3):119-123.
[2]张友旺,谭建平,钟掘.模锻液压机同步平衡系统开关和比例控制的自动调节特性分析[J].机床与液压,1998,15(1):36-38.
[3]蒋鹏,付殿禹,曹飞,等.铁路货车钩尾框精密辊锻过程数值模拟[J].锻压技术,2007,32(3):107-110.
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