



全文预览已结束
下载本文档
版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
附录3外文文献DESIGNOFMOVABLEGANTRYCNCMILLINGMACHINEZHANGJIANABSTRACTTHISPAPERDESCRIBESTHENCMILLINGROLLERTHEOVERALLDESIGNANDANALYSESTHEBILATERALSUPERMODULUSGEARPAIROFDRIVINGMECHANISMOFTHEMAINPOINTSOFDESIGNINSTALLATIONGUIDESURFACEOFTHEXAXISISINTRODUCEDINTHISPAPERKEYWORDSMOBILENCMILLINGDESIGNTHISMACHINEISMAINLYUSEDFORMETALPARTSOFTHEPLANEANDINCLINEDPLANEWORKITHASENOUGHRIGIDITYMILLINGHEADADOPTSMILLINGHEADINTAIWANMILLINGHEADWITHFLEXIBLESPINDLEMOTORISFREQUENCYCONVERSIONMOTORITCANUNDERTAKESTEPLESSSPEEDENSUREACCURACYOFMACHINETOOLSANDMACHININGPRECISIONHASGOODSTABILITYTHISMACHINEISOFHIGHEFFICIENCYANDEXERCISEFORCONVENIENCEMAKETHEDRIVEMORERELIABLEANDCONVENIENTINMAINTENANCELESSCONSUMPTIONBEAUTIFULMODELLINGETCWIDELYUSEDINMECHANICALMANUFACTURINGINDUSTRYTHISPAPERDESCRIBEDTHEMOBILECNCMILLINGREFERSTOLONGMENFRAMEWORKVERTICALMILLINGMOVEMENTTHEBIGGESTADVANTAGEOFMILLINGROLLERIS1MACHINECOVERANAREAOFANAREASMALLWORKBENCHMOBILELONGMENMILLINGMACHINECOMPLETEMACHINEMUSTBEHIGHERTHANVERTICALSTROKELENGTHTWOTIMESHOWEVERWORKBENCHMOBILELONGMENMILLINGMACHINETHELENGTHOFSIDEFRAMEWHICHISFABRICATEDACCORDINGTOADDONLYLONGITUDINALTRAVELWIDTHTHEDYNAMICRESPONSEOFTHEMACHINEISGOODWORKBENCHMOBILELONGMENMILLINGMACHINEADOPTSFIXEDTABLETHEWHOLECASTOUTWITHBEDLONGMENFRAMEWORKOFLONGITUDINALMOTIONDRIVETORQUEEQUIVALENTUNCHANGEDITISNOTBECAUSEOFBEARINGTHEWEIGHTOFTHEWORKPIECECHANGESCHANGESOASTOENSURETHEACCURACYANDPERFORMANCEOFTHEMACHINETOOLTHEINDEPENDENTDESIGNMOBILENCLONGMENMILLING(FIG1)HASBEENASPECIALMACHINETOUSEITCANSATISFYTHELARGECASTINGSSTEELPARTSBORINGANDMILLINGDRILLINGETCMULTIPLEOPERATIONPROCESSITISRIGHTMILLINGHEADITALSOCANPROCESSTHE4SIDEOFWORKPIECETHEGOALOFTHEMAINDESIGNPARAMETERSSUCHASLONGMENMILLINGUNDERWORKBENCHAREA1800MM4000MMTHETRAVELFORXAXIS4000MMTHETRAVELFORYAXIS2000MMTHETRAVELFORZAXIS750MMSPINDLEPOWER185KWEACHAXISRAPIDFEDERATE10M/MINFIGURE1MOBILENCMILLING1MECHANICALPARTSDESIGNTHEBEDINCLUDEBEDSLIDELONGMENFRAMESPINDLEBOXTHREEAXISTODRIVEMECHANICALPARTSANDRELATEDCNCSERVOPARTNOWTHEDESIGNPROCESSISEMPHASIZEDASFOLLOWSTHEBEDISTHEBASICDESIGNWORKTHESIZEOFTHEBEDOFTHEDESIGNAFFECTSTHECOMPLETEMACHINEDESIGNANDTHERATIONALITYOFTHEDESIGNOFDIRECTLYAFFECTTHEWHOLEMACHINESTIFFNESSTHECROSSSECTIONSHAPEFORTHEBEDLIKEFIG2THEPLANEISWORKINGONABEDOFMESADESIGNHAS9TSHAPEDGROOVEFORTHECONVENIENCEOFBEDANDWORKINGMESAOFPUREDIGIMAGETPROCESSINGGROOVETANKCOMPLETELYTHERIGHTANDLEFTTWOCONCERNINGTHEDESIGNHASALONGNARROWSWINGPLANEITISUSEDTOLINEARROLLINGGUIDEVICETHEAUTHORPUTRAILSURFACEDESIGNINTHETWOSIDEBEDTHEMAINCONSIDERATIONOFFORCETRANSMISSIONDIRECTIONSANDUNLOADINGBECAUSETHEBEDWILLBEDRAGONFRAMEWORKOFGRAVITYCUTTINGFORCEANDTHEGRAVITYOFTHEWORKPIECETHISDESIGNCANDIRECTLYINTOTHEGRAVITYOFLONGMENFRAMEWORKTOMACHINETOOLSANDBEDONLYSUFFERTHEGRAVITYOFTHEWORKPIECETHEBEDBYTHEFOLLOWINGBASICWALLTHICKNESSDETERMINEBYTHEFOLLOWINGFORMULAC1/42LBHTYPECLBISRESPECTIVELYFORBEDLENGTHWIDTHANDHEIGHTOFSIZEANDUNITFORTHEMBASEDONEQUIVALENTSIZECCONSULTINGRELEVANTFORM,TAKETHEBASICWALLTHICKNESSIS38MM,FIGURE2SHAPEOFCONCERNINGTHECROSSSECTIONSPINDLEBOXADOPTS300MM300MMSECTIONDESIGNTHETORSIONBENDINGCAPACITYARESTRONGERSPINDLEGEARBOXESUSESTWOGEARSGEARSLIDINGSPEEDCHANGEMECHANISMITCANADAPTROUGHMACHININGREQUIREMENTSSPINDLEUNITADOPTSFOURSUPPORTINGSTRUCTUREAHEADTHREEGROUPSOFANGLECONTACTBALLBEARINGUSEDTOWITHSTANDCUTTINGFORCESPINDLEENDADEEPGROOVEBALLBEARINGSAREUSEDTOUNLOADINGTHATISNOTOFTHESLIDINGGEARSOFTHEADDITIONALMOMENTLONGMENFRAMEWORKUSEDINTEGRALFRAMEWHICHISFABRICATEDACCORDINGTOTHEDESIGNCONCEPTITTOOKABOUTBEAMANDCOLUMNDESIGNINTOAWHOLEALTHOUGHMAKECASTINGANDASSEMBLYADJUSTINGDIFFICULTYTHEWHOLEFRAMEWORKOFLONGMENRIGIDBETTERMOREIMPORTANTISTOSLIDEHAVEASSEMBLEDSPINDLEBOXETCSLIDEISDESIGNEDINTHEFRAMEWHICHISFABRICATEDACCORDINGTOTHEGEOMETRICALDIMENSIONSANDSPINDLEBOXACCORDINGTOTHECENTERAXISOFTHEGUIDEBARASFARASPOSSIBLETOFACEFORTHEPRINCIPLETHEZAXISANDTHEDRIVERINSTALLATIONPOSITIONINDESIGNEFFECTIVELYREDUCETHEWEIGHTOFTHESLIDEDESIGNEDTODRIVEINTOTHEIDEAASFOLLOWSTHEXAXISTODRIVEUSETHEBILATERALSUPERMODULUSGEARPAIRAGGRAVATINGPRELOADINGLINEARROLLINGGUIDEVICEXAXISANDYAXISUSESBIGDIAMETERBALLSCREWPRELOADINGVICEHARDENEDGUIDERAILSLIDINGPARTSATTACHEDENGINEERINGPLASTICSITAVOIDSLOWWHENCRAWLINGPHENOMENONANDGUIDETHEDESIGNISINCLINEDWITHADJUSTABLEDEVICETHISMACHINEDESIGNMAKETHEWHOLEMACHINETOCOORDINATEPERFORMANCETHEAXISOFTHEFEEDINGSPEEDANDFORCEGETTHEOPTIMALMATCHINGDUETOTHELONGITUDINALAXISMACHINEMOVEMENTXANDISMOVINGLONGMENFRAMEWORKOFLONGMENFRAMEWORKWEIGHED10TSOTHELINEARROLLINGGUIDERAILSTOMUSTCHOOSEBECAUSETHEBALLRAILSYSTEMOFSMALLFRICTIONCOEFFICIENTVERYSUITABLEFORLONGMENFRAMEWORKOFMOVINGRIGIDITYREQUIREMENTGUIDETHESLIDERCHOOSEONETYPEEACHSLIDEBLOCKDYNAMICLOADCANACHIEVE10TCONSIDERINGTHESAFETYCOEFFICIENTEVERYGUIDEINSTALLATION2SLIDERLONGMENFRAMEWORKFORTHEDRIVERBILATERALSUPERMODULUSGEARPAIRSEECHART2FEEDMOVEMENTBY3INPUTTHROUGHTWOINCLINEDGEARMOTORSHAFT/ANDAXISTO2ANDTHENBYTWOGEARANDTODRIVERACKANDTHUSPROMOTELONGMENFRAMEW3THEHELICALGEARAXLESPIRALOFTHETWOOPPOSITEDIRECTIONSTHROUGHTHESPRINGINTHESHAFTONATHREEAXIALFORCEFMAKETHEHELICALGEARTRACEOFAXIALMOVEMENTPRODUCEDAT1AND2ANDAXIALSHAFTINTHEOPPOSITEDIRECTIONANGLEOFSMALLROUND4AND5RESPECTIVELYTHEGEARTOOTHSURFACEWITHTWORACKELIMINATETHEGAP123AXIS45RACKFIGURE3BILATERALSUPERMODULUSGEARPAIRSPINDLEBOXANDVERTICALMOTIONZAXISADOPTSBALLSCREWASSEMBLYTRANSMISSIONBECAUSEOFTHISMACHINEISNOTHIGHSPEEDMILLINGMACHINETHEZAXISOFTHEFEEDINGSYSTEMFORSERVOMOTORTHROUGHTHERATIOOF4FORPARALLELAXISSETTHANGEARBOXDRIVESTHEBALLSCREWROTATIONINTHEDESIGNOFSPECIALATTENTIONTOTHEZAXISOFSAFETYPROBLEMSFIRSTCHOOSETHESERVOMOTORWITHELECTROMAGNETICBRAKESECONDINTHEBALLSCREWWITHATWOWAYOVERRUNNINGCLUTCHPREVENTBALLNUTSROTATIONCAUSEDSPINDLEBOXMECHANICALPROLAPSEOFCOURSEINORDERTOPROTECTTHEZAXISFEEDINSTITUTIONSBUTALSOINTHEACCURACYWITHTWOBALANCEONTHESLIDECYLINDERSBALANCEQETCTHEQUALITYOFPARTSINSPINDLEBOX85SPINDLEBOXAROUNDMOVEFORTHEYAXISINORDERTOGUARANTEETHEPRECISIONYAXISANDONLYBYTHEIRLEVELOFBALLSCREWANDAXIALFORCESERVOMOTORANDTHEBALLSCREWSTRAIGHTLEAGUETHEAUTHORSELECTSTHECOUPLINGWITHOVERLOADPROTECTIONDEVICEINTHEOVERLOADWHENCOUPLINGAUTOMATICALLY2SELECTIONOFCNCSYSTEMTHESIEMENSNUMERICALCONTROLSYSTEMISADOPTEDBECAUSETHISSYSTEM840DPROVIDESLONGMENSHAFTSYNCHRONIZATIONFUNCTIONUSETHISFUNCTIONTHEMACHINECANTODRAGONSDOORFRAMEFORSHAFTINTONOX2CLAMPSITSX1MECHANICALDEVIATIONOFDISPLACEMENTTHEACTUALVALUECANEXERCISEFORCOMPARISONEVENTHESMALLESTDEVIATIONCANBECORRECTEDANDTHEREFOREIMPROVETHEACCURACYOFTHEXAXISMOVEMENT3EPILOGUETHEAUTHORFINALLYACCORDINGTOTHEPROFESSIONALMACHINEPARTSMANUFACTURERSTOPROVIDEDESIGNSAMPLESDESIGNWILLREACHTHETWICETHERESULTWITHHALFTHEEFFORTINTHEDESIGNPROCESSTHEAUTHOROFCNCSYSTEMSPINDLEUNITGEARBOXSUPERMODULUSGEARANDBALLSCREWGUIDEETCACCORDINGTOTHESAMPLEOFEMPIRICALFORMULASNOTONLYSHORTENDESIGNTIMEMAKETHEHIGHERRELIABILITYATTHESAMETIMEWEMUSTPAYGREATATTENTIONTOTHETIMELYDESIGNMACHINETOOLSSUCHASTHEAPPLICATIONOFTHREEDIMENSIONALSOFTWARECOMPONENTSIMMEDIATELYAFTERTHEESTABLISHMENTSKETCHESFOR3DMODELTHROUGHTHEASSEMBLYINTERFERENCEMACHINEAVOIDCOLLISIONSOCCURWHENINASSEMBLYWADEREWORKPHENOMENON翻译移动式数控龙门铣床的总体设计张坚摘要阐述了移动式数控龙门铣床的总体设计,并重点分析了双边齿轮齿条副驱动机构的设计要点,对X轴的导轨安装面作了介绍。关键词移动式数控龙门铣床设计本文所述的移动式数控龙门铣床是指龙门框架作纵向移动的龙门铣床。移动式龙门铣床的最大优点是(1)机床占地面积小。工作台移动式龙门铣床,整机长度必须两倍于纵向行程长度,而移动式龙门铣床的整机长度只需纵向行程加上龙门架侧面宽度即可。(2)机床的动态响应好。移动式龙门铣床采用的是固定工作台,一般与床身整体铸出,龙门框架纵向运动的驱动力矩等值不变,不会因工件的承载重量的改变而变化,从而保证了加工精度和机床的响应性能。笔者独立设计的移动式数控龙门铣床(图1),现已作为专机投入生产应用,能满足大型铸件、钢件的镗、铣、钻等多工序加工;配上直角铣头,还可对工件的个侧面进行加工。由于设计思想正确,配套零部件质量过关,该机床各项指标均已达到数控龙门铣床相关国家标准的要求。该龙门铣床的主要设计参数如下工作台面积为1800MMX4000MM,X轴行程为4000MM,Y轴行程为2000MM,Z轴行程为750MM,主轴功率185KW,各轴快速进给为10M/MIN。1机械部分设计整机分为床身、龙门架、滑台、主轴箱、三轴进给驱动机构机械部分及相关数控伺服部分。现把设计过程中的重点阐述如下床身是本次设计工作的基础,床身的尺寸设计影响着对整机的设计,而且设计的合理性直接影响到整机的刚度。床身的截面形状为形(图1)。床身的上平面即工作台面设计有9条T形槽,为方便床身工作台面和T形槽的精刨加工,槽完全贯通。床身的左、右两下脚各设计有一个狭长平面,用来安放滚动直线导轨副。笔者把导轨面设计在床身的两下侧,主要是考虑力的传递方向与卸荷问题。因床身会受到龙门框架的重力、切削力和工件的重力,这样的设计可使龙门框架的重力直接传入到机床的基础上,而床身只受到工件的重力。床身的基本壁厚由以下公式初定C1/42LBH式中LBH分别为床身的长、宽、高尺寸,单位为M。根据当量尺寸C,查阅相关表格(略),取基本壁厚为38MM。主轴箱采用300MMX300MM截面设计,其抗扭抗弯能力更强。主轴变速箱采用两档滑移齿轮变速机构,可适应粗精加工需求。主轴单元采用4支承结构,前面三组角接触球轴承用来承受切削力,主轴尾部一个深沟球轴承用来卸荷,使主轴不受到滑移齿轮产生的附加力矩的影响。龙门框架采用的是整体龙门架的设计概念,即把横梁与左右立柱设计成一体,虽然使铸造和装配调整时的难度加大,但整体龙门框架的刚性更好,更重要的是使主轴箱、滑台等部件有了装配基准。滑台的设计是在龙门架和主轴箱的几何尺寸确定后,按照主轴的中心尽量贴近横梁上的导轨面为原则,并把Z轴驱动安装位置设计在滑台上,有效地减轻了滑台的重量。设计进给驱动机构的构思如下X轴的进给驱动机构采用双边齿轮齿条副加重预压滚动直线导轨副,Y轴与X轴采用大直径预压滚珠丝杠副加硬导轨副,且导轨滑动部分贴有工程塑料,避免低速时产生爬行现象,而且导轨部分设计有斜镶条可调装置。这样设计使机床的整体进给性
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 81《牛顿第一定律 惯性》(教学设计)-2024-2025学年教科版(2024)初中物理八年级下册
- 6《景阳冈》教学设计-2023-2024学年统编版语文五年级下册
- 13 美丽的冬天(教学设计)2024-2025学年统编版道德与法治一年级上册
- 2024-2025学年高中生物 第一章 孟德尔定律 第二节 自由组合定律教学设计4 浙科版必修2
- 2024-2025学年高中物理 第9章 固体、液体和物态变化 2 液体教学设计2 新人教版选修3-3
- Unit 6 How do you feel Part B Let's talk(教学设计)-2024-2025学年人教PEP版英语六年级上册
- 葡萄胎的护理诊断
- 17 跳水教学设计-2023-2024学年五年级下册语文统编版
- 2024-2025学年高中数学 第一章 统计案例 1.2 独立性检验的基本思想及其初步应用(1)教学设计 文 新人教A版选修1-2
- 《迎接蚕宝宝的到来》(教学设计)2023-2024学年教科版三年级科学下册
- 湖南省炎德英才名校联考联合体2024-2025学年高二下学期3月月考-数学+答案
- (3月省质检)福建省2025届高三毕业班适应性练习卷英语试卷(含答案)
- 专业网格员测试题及答案
- 2025年上半年贵州黔东南州各县(市)事业单位招聘工作人员1691人笔试易考易错模拟试题(共500题)试卷后附参考答案
- 湖南省长沙市雅礼教育集团2024-2025学年高一上学期期末考试英语试卷含答案
- 2025年广东深圳高三一模英语试题及词汇解析
- 电力应急物资储备与管理
- 钕铁硼项目可行性分析报告(模板参考范文)
- 【语文】第三单元整本书阅读《骆驼祥子》圈点、批注、做笔记课件-2024-2025学年统编版语文七年级下册
- 新目录监理规划2025
- 储能项目竣工报告
评论
0/150
提交评论