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钢坯冷锯机液压系统设计说明书毕业论文.doc

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钢坯冷锯机液压系统设计说明书毕业论文.doc

辽宁科技大学本科生毕业设计第I页钢坯冷锯机液压系统设计摘要随着我国国民经济的快速发展,工业化程度逐年提高,作为基础产业的钢铁业规模已连续数年稳居世界首位,每年生产将近一亿吨的热轧及冷弯型材、管材、棒材,这其中80﹪以上的产品都采用了锯机完成切头、切尾、定尺切断工作,由于具备了生产效率高、锯切的质量好、运行成本低等特点。与剪切机比较,金属没有被强行塑性拉断的部分,因而轧件切口处精度较高。金属锯切锯机成为了现代轧钢生产线中的重要一环,它能否正常运转,关系到整条轧线的生产能力能否正常发挥。为此,此次设计为钢坯冷锯机液压传动系统。这是一个很重要的系统,它包括两个支路夹紧缸的夹紧过程和锯切缸的锯切过程。在此次设计过程中,对这两个支路进行了受力分析计算,对各个元件的选用进行说明。对液压执行元件、液压阀、液压辅助元件和泵站进行计算。关键词液压传动系统冷锯机液压阀泵站辽宁科技大学本科生毕业设计第II页HydraulicSystemDesignOfColdSteelMachineAbstractWiththerapiddevelopmentofChinasnationaleconomyandtheincreasementofthedegreeofindustrializationovertheyears,asthebasicindustriesofironandsteelindustryhasthesizeofitspositionastheworldforseveralyears,andannualproductionofnearly100milliontonsofhotrolledandcoldformedprofiles,tubes,rods,whichmorethan80oftheproductsarecompletedusingthesawcuthead,cuttail,cutofflengthworkproductivitybecauseofthehighqualityofthesawing,andlowrunningcosts.Comparedwiththeshearingmachine,metalhasnotbeenforciblypulledofftheplasticpart,thusaccuracyoftheincisionrollingishigher.MetalCuttingSawhasbecomeanimportantsegmentofthemodernsteelrollingproductionline.Whetheritisthenormaloperation,itrelatestothewholerollinglineofthenormalproductioncapacity.Tothisend,thedesignisthehydraulicdrivesystemsawthecoldsteel.Thisisaveryimportantsystem,whichincludestwosliptheprocessofclampingcylinderandtheclampingcylindersawingthesawingprocess.Duringthedesignprocess,thesetwoslipcalculationfortheforceanalysis,theselectionofthevariouscomponentsaredescribed.Theimplementationofhydrauliccomponents,hydraulicvalves,hydrauliccomponentsandauxiliarypumpingstationiscalculated.KeywordsHydraulicdrivesystemColdSawHydraulicvalvePumpingstation辽宁科技大学本科生毕业设计第III页目录1绪论......................................................................................................................................11.1锯切机械的组成..........................................................................................................11.2金属冷切圆锯片国内外的发展趋势..........................................................................11.3锯机的分类及其特点..................................................................................................11.3.1摆动式锯机.........................................................................................................21.3.2平推式锯机.........................................................................................................21.4液压传动的介绍..........................................................................................................31.5液压传动的特点..........................................................................................................31.5.1液压传动的优点.................................................................................................31.5.2液压传动的缺点.................................................................................................41.6课题设计内容介绍......................................................................................................42液压系统的相关设计参数............................................................................................53制定系统方案和拟定液压系统图..............................................................................63.1液压系统的组成及设计要求......................................................................................63.2制定系统方案..............................................................................................................63.3拟定液压系统原理图..................................................................................................74载荷的组成和计算..........................................................................................................84.1液压缸载荷组成..........................................................................................................84.2各液压缸载荷的计算..................................................................................................94.2.1夹紧缸的载荷计算.............................................................................................94.2.2锯切缸的载荷计算...........................................................................................10辽宁科技大学本科生毕业设计第IV页5计算液压缸的主要结构尺寸.....................................................................................125.1初选系统工作压力....................................................................................................125.2液压缸的主要结构尺寸计算....................................................................................125.2.1液压缸的主要结构尺寸组成...........................................................................125.2.2液压缸的主要结构尺寸计算...........................................................................135.3计算液压缸所需流量及实际工作压力....................................................................145.3.1夹紧缸所需流量和实际工作压力...................................................................145.3.2锯切缸所需流量和实际工作压力...................................................................156液压元件的选择.............................................................................................................166.1液压缸的选用............................................................................................................166.2液压泵的选用............................................................................................................176.3电动机的选用............................................................................................................186.4液压阀的选用............................................................................................................196.5油管尺寸的计算........................................................................................................196.5.1管道内径的计算...............................................................................................206.5.2管道的选择.......................................................................................................216.5.3管接头的选择...................................................................................................226.6油箱容积及尺寸确定................................................................................................226.7蓄能器的选择............................................................................................................236.8液压介质的选择........................................................................................................236.9其余液压辅助元件的选择........................................................................................247液压系统性能验算........................................................................................................267.1液压系统压力损失计算............................................................................................26

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