楔键联接：键的上下两表面是工作面，键的上表面和轮毂键槽底面均有1∶100的斜度，装配后，键即楔紧在轴和轮毂的键槽里，工作表面产生很大预紧力。Wedgekeyconnection:theupperandlowertwosurfacesofthekeyaretheworkingfaces.Theuppersurfaceofthekeyandthebottomofthehubkeywayh***e1to100slope.Afterassembly,thekeyiswedgedtightlyinthekeywayoftheshaftandhub,andtheworkingsurfacehasalargepretighteningforce.花键联接按齿形的不同，可分为矩形花键和渐开线花键两类，这两类花键均已标准化。矩形花键的定心方式为小径定心，即外花键和内花键的小径为配合面。其特点是定心精度高，定心的稳定性好，能用磨削的方法消除热处理引起的变形。Thesplineconnectioncanbedividedintotwotypes:rectangularsplineandinvolutespline.Thetwokindsofsplinearestandardized.Thecenteringwayoftherectangularsplineisthe***alldiametercentering,thatis,the***alldiameteroftheoutersplineandtheinnersplineisthematchingsurface.Itischaracterizedbyhighcenteringprecisionandgoodstabilityofcentering.Itcanbeusedtoremovethedeformationcausedbyheattreatmentbygrinding.装夹后产品靠近活动钳口附近容易上翘、抬起，多次装夹一致性差。传统机用虎钳的螺旋副间隙较大，在使用中会产生较大振幅的振动；而活动座和虎钳体之间的滑动接触面较大，采用的间隙也较大。Aftertheclamping,theproductiseasytoandliftednearthemovablejaw,andthecistencyoftheclampingispoormanytimes.Thespiralpairclearanceoftraditionalmachineviceisbigger,whichwillcauselargeamplitudevibrationinuse.Theslidingcontactbetweenmovableseatandjawvicebodyislarger,andthegapusedisbigger.)