(机电系)CA6140床头箱I轴加工工艺及花键夹具刀具毕业设计

XXXX大学毕业设计说明书毕业设计题目:CA6140床头箱I轴加工工艺及花键夹具刀具设计系机电工程系专业班级07机制3班姓名学号指导教师2010年4月8号I摘要本次毕业设计的内容是设计CA6140床头箱主轴的加工工艺、夹具及铣刀的设计。轴是机器中的重要零件，有支持旋转等作用。而该轴也是CA6140中的重要零件之一，其的主要作用是通过皮带和带轮传递动力，该轴的主要工况是承受弯矩、扭矩和变形等，所以容易疲劳断裂，容易扭断、弯曲变形等。因此在设计工艺时需考虑到以上的工况情况，提高该轴的综合性能。因该轴的加工过程还需设计专用夹具，本次设计加工该轴的Φ38g6花键的夹具，在设计专用夹具时，不仅要考虑到加工花键的表面粗糙度和位置度的要求，还需要考虑到提高效率、降低成本、降低劳动强度等等。同时本次设计还有对加工Φ38g6花键的精铣铣刀进行设计，在设计此铣刀时，主要考虑加工花键的制造精度、轴心线的径向跳动允许误差和不等分累积误差等。关键词：轴、工艺、夹具、花键铣刀。IIAbstractThegraduationdesignofthecontentsoftheboxdesignCA6140spindlebedprocessing,millingandfixturedesign.-Axismachineistheimportantparts,suchasarotatingsupportrole.TheshaftistheCA6140oneoftheimportantparts,themainroleistopassabeltandpulleytransmissionpower,Themainaxisofthestatetobearmoment,torqueanddeformationand,therefore,pronetofatiguefractureeasilytranstensional,bendingdeformation.Sointhedesignprocesstobeconsideredwhentheaboveconditions,enhancetheperformanceoftheshaft.Astheaxismachiningprocessneededspecialfixturedesign,thedesignoftheprocessingtimeoftheAxisofΦ38g6spentcrucialfixture.inthedesignofspecialfixture,notonlytotakeintoaccounttheprocessingsplinesurfaceroughnessandlocationoftherequest,itisalsonecessarytoconsiderthatincreaseefficiencyandreducecost,reducelaborintensity,andsoon.Inaddition,thedesignshavetospendprocessingΦ38g6bondprecisionmillingcutterdesign,thedesignofthiscutter,themainconsiderationprocessingsplinemanufacturingprecision,theradialaxisbeatingtolerancesandrangeshoursaccumulatederror.Keywords:Shaf；Crafts；Fixture；SplinemillingIII目录摘要.........................................................................................................................................I序言.........................................................................................................................................V绪论.........................................................................................................................................6第一章加工工艺规程的制订.................................................................................................71.1.课题简介.............................................................................................................71.2、零件的分析.......................................................................................................71.2.1零件的功用................................................................................................71.2.2计算生产纲领，确定生产类型.................................................................71.2.3零件的工艺性分析和零件图的审查.........................................................71.3零件工艺规程设计.............................................................................................81.3.1确定零件生产类型....................................................................................81.3.2确定零件毛坯的制造形式.........................................................................81.3.3拟定零件的机械加工工艺路线.................................................................81.3.4加工余量的确定......................................................................................111.3.5确定切削用量及基本工时.......................................................................12第二章铣刀的设计...................................................................................................582.1铣刀的尺寸和形状设计....................................................................................582.1.1确定铣刀宽度与齿形高度.......................................................................582.1.2确定容屑槽底形式................................................................................582.1.3确定铣刀孔径..........................................................................................582.1.4选铣刀外径..............................................................................................582.1.5选铣刀齿数..............................................................................................582.1.6确定铣刀后角及铲削量..........................................................................582.1.7确定容屑槽底半径..................................................................................592.1.8确定容屑槽角..........................................................................................592.1.9确定容屑槽底形状和深度.......................................................................592.1.10校验铣刀刀体强度................................................................................592.1.11校验铲磨齿形时砂轮是否和下一个刀齿发生干涉..............................59IV2.1.12确定分屑槽尺寸....................................................................................602.1.13确定内孔空刀尺寸及键槽尺寸.............................................................602.1.14确定铣刀的技术条件............................................................................60第三章夹具设计...........................................................................................................613.1概述...................................................................................................................613.2.夹具的设计.......................................................................................................613.2.1定位基准的选择.........................