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双动薄板冲压机液压系统设计说明书.doc

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双动薄板冲压机液压系统设计说明书.doc

第I页双动薄板冲压机液压系统设计摘要随着航天、汽车、轮船等钣金件工业的不断进步,市场对薄板质量的需求越来越高,对薄板的冲压性能也越来越高,不仅要求生产效率的提高,生产质量更要求严格。因此,薄板冲压机对钣金件冲裁、拉伸、成形、弯曲、校正等加工工艺中起到非常重要,同时也能起到提高生产效率和生产质量。近年来,我国的工程机械取得了蓬勃的发展,其中,液压传动技术起到了至关重要的作用。而且,随着液压传动技术的快速发展和广泛应用,它已成为下业机械、下程建筑机械等行业小可缺少的重要技术。然而,尽管液压技术在机械能与压力能的转换已取得很大进展,但它在能量损失和传动效率上仍然存在着问题。因为,在液压系统中,随着油液的流动,有相当多的液体能量损失掉,这种能量损失不仅体现在油液流动过程中的内摩擦损失上,还反映在系统的容积损失上,使系统能量利用率降低,传动效率无法提高。高能耗和低效率又使油液发热增加,使性能达不到理想的状况,给液压技术的进一步发展带来障。因此,探索和研究高效液压传动技术,提高其综合性能就成为了液压技术领域研究的重点之一。关键词钣金件工程机械损失高效第II页DoubleactionthinsteelplatepunchpresshydraulicsystemdesignAbstractAlongwithsheetmetalindustrysandsoonastronautics,automobile,steamboatunceasingprogresses,themarketisgettinghigherandhighertothethinsteelplatequalitysdemand,isalsogettinghigherandhighertothethinsteelplaterammingperformance,notonlytherequestproductionefficiencysenhancement,theproductionqualityrequestsstrictly.Therefore,thethinsteelplatepunchpresstothesheetmetalblanking,thestretch,theforming,curving,processingcraftsandsoonadjustmentgetsupisimportant,simultaneouslycanalsohavetheenhancementproductionefficiencyandtheproductionquality.therecentyears,ourcountrysengineeringmachineryhasmadethevigorousprogress,thehydraulictransmissiontechnologyplayedtherolewhichwantedveryimportant.Moreover,alongwiththehydraulictransmissiontechnologysfastdevelopmentandthewidespreadapplication,ithasbecometheimportanttechnologywhichindustrythemachinery,professionsandsoonfarewellgiftoffoodconstructionmachinerysmallmaylack.However,althoughthehydraulictechniquehasmadetheverybigprogressinthemechanicalenergyandthepressureenergytransformation,butitstillhastheproblemintheenergylossandthetransmissionefficiency.Because,inthehydraulicsystem,alongwiththefatliquorflowing,hasthequitemanyliquidenergyloss,thiskindofenergylossnotonlymanifestsinthefatliquorflowingprocessintheinternalfrictionloss,butalsoreflectedthatinsystemsvolumetricloss,causesthesystemenergyusefactortoreduce,thetransmissionefficiencyisunabletoenhance.GaoNenghaoandthelowefficiencycausethefatliquortogiveoffheatincrease,enabletheperformancenottobeabletoachievetheidealcondition,bringsforhydraulictechniquesfurtherdevelopmentbonds.Therefore,theexplorationandtheresearchhighlyeffectivehydraulictransmissiontechnology,enhanceditsoverallperformancetobecomeoneofhydraulictechniquearearesearchkey.第III页目录1绪论....................................................11.1课题提出的背景及目的..............................................11.2液压系统的优点和缺点及发展趋势....................................21.2.1液压系统的优点...............................................21.2.2液压系统的缺点..............................................21.2.3液压系统发展趋势............................................22双动薄板冲压机液压系统的参数.............................52.1动作要求.........................................................52.2给定参数.........................................................53制定基本方案和绘制液压系统图..............................73.1制定基本方案.....................................................73.2绘制液压系统图...................................................73.3液压系统工作原理.................................................84初步确定液压系统参数......................................94.1液压缸参数的计算与选用...........................................94.1.1受力分析.....................................................94.1.2初选系统工作压力...........................................134.1.3计算缸的主要结构尺寸.......................................144.1.4计算活塞缸所需流量.........................................164.1.5计算柱塞缸所需流量.........................................174.2液压泵的选择............................................................................................................184.2.1确定液压泵的最大工作压力...................................184.2.2确定液压泵的的流量.........................................194.2.3选择液压泵的规格...........................................194.3选择电动机................................................................................................................194.4液压阀的选择............................................................................................................204.4.1溢流阀的选择...............................................204.4.2换向阀的选择...............................................214.4.3节流阀的选择...............................................234.4.4单向阀的选择...............................................24第IV页4.5液压辅助元件的选择及计算....................................................................................264.5.1蓄能器的设计................................................264.5.2管道尺寸的计算..............................................274.5.3液压管及管接头的选择.......................................284.5.4过滤器的选择...............................................294.5.5油箱的初步选择.............................................294.5.6压力表的选择................................................314.5.7过滤器的选择................................................315性能验算.................................................325.1验算液压系统性能..........................................................................................................325.1.1管路沿程压力损失............................................325.2液压系统发热温升计算...................................................................................................335.2.1计算液压系统的发热功率......................................336液压站的设计.............................................366.1液压站的设计概述....................................................................................................366.2液压站结构设计的注意事项....................................................................................377环保性、经济性以及安全性分析.............................387.1环保性分析................................................................................................................387.1.1污染控制...................................................387.1.2泄漏控制...................................................397.2经济性分析................................................................................................................417.3安全性分析................................................................................................................41结论...........................................错误未定义书签。感谢......................................................43参考文献...................................................44

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