文档介绍：标准螺纹螺距Thread,pitch,standarddefaultclassificationStandarddentalpitch:-m7***************-m24**(***・Threadisdividedintothreetypes:triangularthread,trapezoidalthread,squarethread,etc・().,andthebasicsizesareasfollows:montrianglethreadbaseteethD-diameterofinternalthread(nominaldiameter);D-largediameterofexternalscrew(nominaldiameter);D2-thediameteroftheinnerthread;D2-thediameteroftheexternalthread:DI-innerthreadedpath;DI-off-threadtrail;P-pitch;H--theoriginaltriangleheight・Therearethreebasicelementsofthreaddetermination:=60o,・Thediameterofthethread,D2(D2),・Onlywhenthediameterofinsideandoutsidethreadsisidentical,,cuttingtoolknifeAngleisequaltothetypeofthreadAnglealpha二o,60ofitsformerAngleo二0otoensurethattheworkpiecescrewtoothtypeAngle,toothtypeAnglewi11producetheerror・uracy,thefrontAngleofthemachineis5o、,andmodelofcutter,toensuretheAnglebisectorofbladeAngleandtheaxisoftheworkpieceareperpendicular,caroutofthetoothtypeAnglewillbeskewed・・First,takethediameterofthethreadtothesize,thenusethetipoftheknifetocutamicrovisiblelinefromthethreadontheworkpiece,andmarkitasthebackofth