车床转盘零件的机械加工工艺规程和专用夹具设计毕业论文.doc

(此文档为w?ord格式?，下载后您可?任意编辑修?改！) 摘要 用与车外圆?、端面和镗孔?等加工的机?床叫车床。车削很少在?其他种类的?机床上进行?，因为其他机?床都不能像?车床那样方?便地进行车?削加工。由于车床除?了用于车外?圆外还能用?于镗孔、车端面、钻孔和铰孔?，车床的多功?能性可以使?工件在一次?定位安装中?完成多种加?工。这就是在生?产中普遍使?用各种车床?比其他种类?的机床都要?多的原因。 车床的主要?部件：床身、主轴箱组件?、尾架组件、拖板组件、变速齿轮箱?、丝杠和光杠? 大多数车床?的刀架安装?在复式刀座?上，刀座上有底?座，底座安装在?横拖板上。可绕垂直轴?和上刀架转?动；上刀架安装?在底座上，可用手轮和?刻度盘控制?一个短丝杠?使其前后移?动。 转盘用螺栓?与中滑板紧?固在一起，松开螺母，可使其在水?平面内扳转?任意角度，小滑板沿转?盘上的导轨?可以做短距?离的移动，当转盘扳转?某一角度后?，小滑板便可?带动车刀做?相应的斜向?移动。普通车床的?转盘位于上?刀架和下刀?架之间，它是上刀架?的导向件，当需要用小?刀架车锥面?时，可通过赚盘?相对于下刀?架的转动来?调整锥角， 本说明书堆?车床转盘零?件的作用，零件的工艺?过程，夹具设计做?了比较系统?完整的分析?和论证。对工艺规程?的设计做了?详细的说明?，并制定了合?理的加工工?艺路线，编制了一整?套的机械加?工工艺卡片?。对关键工序?的加工余量?、工序尺寸、工序公差、切削用量等?进行了计算?。对机械加工?工艺过程中?需要的夹具?具进行了设?计分析，保证整个工?艺过程的完?整性。 关键词：金属切削；转盘；精度；工艺规程；公差 Abstr?act The basic? machi?nes that are desig?ned prima?rily to do turni?ng, facin?g and borin?g are calle?d lathe?s. Very littl?e turni?ng is done on other? types? of machi?ne tools?, and none can do it with equal? facil?ity. Becau?se lathe? can do borin?g, facin?g, drill?ing, and reami?ng in addit?ion to turni?ng, their? versa?tilit?y permi?ts sever?al opera?tions? to be perfo?rmed with a singl?e setup? of the workp?iece. These? accou?nts for the fact that lathe?s of vario?us types? are more widel?y used in manuf?actur?ing than any other? machi?ne tool. Lathe? Const?ructi?on: The essen?tial compo?nents? of a lathe? are depic?ted in the block? diagr?am. These? are the bed, most lathe?s the tool post actua?lly is mount?ed on a compo?und rest. This consi?sts of a base, which? is mount?ed on the cross? slide? so that it can be pivot?ed about? a verti?cal axis, and an .upper? casti?ng. The upper? casti?ng is mount?ed on ways on this base .so that it can be moved? back and forth? and contr?olled? by means? of a short? lead screw? opera?ted by a make the turnt?able rotat?ed in the level? for no mater? what angle?. The minor? slip board? can move along? the rail of turnt?able for a short? dista?nce. When the turnt?able rotat?es an angle?, the minor? slip board? will make a