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M1432A万能外圆磨床液压系统设计说明书.doc

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M1432A万能外圆磨床液压系统设计说明书.doc

黑龙江工程学院本科生毕业设计I摘要在全面了解磨床结构、工作原理、液压系统的基础上,论文对磨床总体尺寸进行布局及对液压系统进行设计。M1432A型万能外圆磨床主要以磨削圆柱形或圆锥形(包括阶梯形)的外圆表面和内孔,成品的尺寸精度可达1~2级,表面光洁度可达T8~T10。对机床液压系统有着较高、较复杂的要求。用液压系统实现工作台的自动往复运动、砂轮架的快速进退、尾架顶尖的伸缩以及必要的联锁动作。本系统在结构上采用了将开停阀、先导阀、换向阀、节流阀、抖动缸等组合一体的操纵箱。使结构紧凑、管路减短、操纵方便,又便于制造和装配修理。此操纵箱属行程制动换向回路,具有较高的换向位置精度和换向平稳性。而且采用活塞杆固定式双杆液压缸,还对液压系统的回路做了进一步的设计和改进。关键词磨床液压缸万能型外圆磨床液压系统操纵箱黑龙江工程学院本科生毕业设计IIABSTRACTBasedonunderstandinggrinderstructure,workprinciple,andthehydraulicsystem,thepapercarriesontheoverallsizelayoutofthegrinderandthedesignofthehydraulicsystem.M1432Amultifunctioncylindricalgrindingismainlyusedtogrindthecylindricalsurfaceandtheholeinsideofcylinderandconeincludingsteppedappearance.Thesizeprecisionofthefinalproductmayachieve12grade.ThefinishdegreeofsurfacemayachieveT8T10.Soitrequiredhigherandmorecomplexrequirementtothehydraulicpressuresystemofmachinetool.Throughhydraulicsystem,theautomaticallyreciprocatingmotionofworkingtable,theadvanceandretreatofgrindingwheelrack,theexpansionandcontractionoftailstockcenter,aswellastheessentialinterconnectionmovementcanberealized.Inthepaper,thesystemadoptthecontrolboxwhichiscomposedoftheopeningandstoppingvalve,pilotvalve,directionalcontrolvalve,throttlevalve,thevibrationcylinderandsoon.Itmakesthestructurecompact,thepipelineshort,andtheoperationconvenient,anditisconvenienttomanufacture,assembleandrepair.Thiscontrolboxisatypeoftravelbrakingchangeovercircuitithashighercommutationpositionprecisionandthecommutationstability.Moreover,thesystemadoptsthepistonrodstationarytypedoublepolehydrauliccylinder,andwealsomakethefurtherdesignandchangetotheloopofhydraulicsystem.KeywordsGrinderHydraulicCylinderMultipurposeCylindricalGrinderHydraulicSystemControlBox黑龙江工程学院本科生毕业设计目录摘要.......................................................................................................................................IAbstract................................................................................................................................II第1章绪论......................................................................................................................11.1选题的背景目的及其意义......................................................................................11.1.1背景................................................................................................................11.1.2目的及其意义................................................................................................21.2国内外磨床研究状况和相关领域中已有的研究成果..........................................21.3对选题的研究设想、研究方法..............................................................................31.4预期结果和意义......................................................................................................5第2章机床总体方案的确定.....................................................................................62.1总体设计..................................................................................................................62.1.1主要技术指标设计.......................................................................................62.1.2总体方案设计...............................................................................................62.1.3总体方案综合评价和选择...........................................................................62.1.4总体方案的设计修改和优化.......................................................................62.2详细设计..................................................................................................................72.3机床整体综合评价..................................................................................................72.4本章小结..................................................................................................................7第3章总体尺寸布局设计..........................................................................................83.1纵向尺寸关系图的确定与绘制..............................................................................83.1.1确定纵向尺寸的基准线...............................................................................83.1.2确定砂轮对称中心线位置...........................................................................83.1.3确定工作台对称中心线位置.......................................................................93.1.4确定上、下工作台长度...............................................................................93.1.5确定油压筒用活塞杆的固定形式和长度...................................................93.1.6确定后床身上面的垫导板导轨尺寸位置.................................................103.1.7确定横进给丝杆中心位置.........................................................................10黑龙江工程学院本科生毕业设计3.1.8确定手摇台面机构的手轮中心位置.........................................................113.1.9确定齿条长度及齿轮位置.........................................................................113.2横向尺寸关系图的确定与绘制............................................................................113.2.1确定横向尺寸的基准线.............................................................................113.2.2确定上下工作台厚度和宽度.....................................................................113.2.3确定头尾架顶尖中心位置.........................................................................133.2.4确定头尾架顶尖中心至床身面的高度.....................................................133.2.5确定横进给机构手轮中心的高度.............................................................133.2.6确定油压套中心位置.................................................................................133.2.7确定工作台回转中心位置.........................................................................133.2.8确定后床身有关的几个尺寸.....................................................................133.2.9确定最大最小极限位置.............................................................................143.2.10确定砂轮架横向行程长度.......................................................................143.2.11确定滑鞍长度...........................................................................................153.2.12确定垫板长度...........................................................................................153.3本章小结................................................................................................................16第4章M1432A万能外圆磨床液压系统............................................................174.1设计步骤................................................................................................................174.2液压系统总体布局及其原理................................................................................174.2.1工作台往复运动.........................................................................................174.2.2砂轮架快速进退.........................................................................................194.2.3尾架顶尖的液动夹紧.................................................................................194.3液压系统的工作原理............................................................................................194.3.1工作台的往复运动.....................................................................................194.3.2砂轮架的快速进退.....................................................................................204.3.3尾架顶尖的液动夹紧.................................................................................214.4液压系统中的换向机构及其性能........................................................................214.4.1采用先导阀.................................................................................................214.4.2选用行程控制式制动.................................................................................224.4.3使换向阀分段变速移动.............................................................................224.4.4使先导阀快跳.............................................................................................234.5液压系统的特点....................................................................................................23

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