拖拉机变速箱体双面钻孔组合机床总体及左主轴箱设计摘要：拖拉机生产是大批量生产。为了提高加工精度和生产效率，需要设计一台组合机床来改善拖拉机变速箱的加工情况。本课题设计的是金马300拖拉机变速箱箱体双面钻孔组合机床。用于加工箱体的左、右两个面上的36个M10的螺纹底孔、16个M8的螺纹底孔、2个∅20的光孔、2个∅12的光孔和一个M16的螺纹底孔，一次装夹同时完成55个孔的加工。该机床设计的重点是总体设计和部件设计两部分。总体设计包括机床配置型式的确定、结构方案的选择以及“三图一卡”的绘制。部件设计包括确定主轴和齿轮、完成动力计算、设计传动系统。该组合机床采用卧式单工位两面加工的方案，加工和装配的工艺性好，零件装夹方便。采用机械滑台实现刀具进给，借助导套引导刀具实现精度稳定的加工。主轴采用标准主轴，刀具选用复合麻花钻，使得工序集中。本组合机床效率高，成本低，加工精度高，操作使用方便，减轻了工人的劳动强度，提高了劳动生产率。关键词：变速箱；钻孔；组合机床；主轴箱本设计来自：完美毕业设计网http://www.bysj520.com登陆网站联系客服远程截图或者远程控观看完整全套论文图纸设计客服QQ：8191040DesignofGeneralandLeftHeadstockofModularMachineToolforDrillingHolesonTwo-SideofTractorGearBoxAbstract:Thetractorisaproductwhichneedsmassiveproduction.Inordertoimprovetheprecisionandtheproductionefficiency,itisnecessarytodesignahigheffectivemodularmachinetooltomakethetractorgearbox.Thistaskistodesigntheoverallschemeandleftheadstockofmodularmachinetoolfordrillingholesontwo-sideofJM300tractorgearbox.Themodularmachinetoolisusedtodrill36basicholesofM10screw,16basicholesofM8screw,2holesof∅20,2holesof∅12,andabasicholeofM16screw,whichareontheleftandright.Thefocusesofthistopicisthesystemdesignandtheleftheadstockdesign.Thesystemdesignincludesthedefinitionofthemodularmachinetool,theselectionofthestructureplanandthecompletionofthetechnologicaldrawingsofpartwhichneedtobemanufactured,thegeneraldrawingsofmodularmachinetool,drawingsofcutterdisplayandtheefficiencycardsofmanufacture.Theleftheadstockdesignincludesdeterminingthespindleandthegears,completingthepowercomputation,designingthetransmissionsystem.Themodularmachinetoolusesthehorizontal-typesinglelocationthree-sideprocessingplan,theprocessingandassemblytechnologycapabilityisgood,anditclampsconveniently.Usingmechanicalslidingunit,withtheaidofpreciselyleads,thesetofguidancecuttingtoolcancompletedispositionalprocess.Thespindleusesstandardone,thecuttingtoolisthecompoundtwistdrill,makingtheworkingproceduretobecentralized.Thismodularmechanicaltoolhassuchadvantageswhichishighefficiency,thecostislow,theprocessingprecisionishigh,itiseasytooperate,itreducestheworker’slaborintensity,anditenhancedtheproductivity.Keyword:Gearbox;Drillhole;Modularmachinetool;Headstock.目录1前言..............................................................12组合机床总体设计..................................................32.1总体方案论证....................................................32.1.1被加工零件的特点..............................................32.1.2工艺路线的确立................................................32.1.2机床配置型式的选择............................................42.1.3定位基准的选择................................................52.2确定切削用量及选择刀具..........................................52.2.1选择切削用量..................................................52.2.2计算切削力、切削扭矩及切削功率................................72.3组合机床总体设计—三图一卡.............................
