螺纹联接基础知识Basicknowledgeofthreadedconnections主讲人：刘宝生

联接的分类Classificationofconnections静联接：在机器工作中，不允许零部件之间存在相对运动联接。Staticconnection:Inmachineoperation,relativemotionconnectionsbetweencomponentsarenotallowed.动联接：机器工作时，零部件之间可以有相对运动。Dynamicconnection:Duringmachineoperation,therecanberelativemotionbetweencomponents.例如：各种运动副之间的联接。Forexample,theconnectionbetweenvariousmotionpairs.静联接——螺纹联接Staticconnection-threadedconnection动联接——四杆机构Dynamicconnection-fourbarmechanism

静联接Staticconnection:可拆联接：不须毀坏联接中的任何一个零件就可拆开的联接。例如：螺纹联接、键联接、销联接。Detachableconnection:aconnectionthatcanbedisassembledwithoutdamaginganypartoftheconnection.Forexample:threadedconnection,keyconnection,pinconnection.不可拆联接：至少毁坏联接中的一部分才能拆开的联接。例如：铆接、焊接等。Nondetachableconnection:aconnectionthatcanonlybeopenedbydestroyingatleastapartoftheconnection.Forexample:riveting,welding,etc.可拆联接——减速器Detachableconnection-reducer不可拆联接——角铁焊接Nondetachableconnection-angleironwelding

123螺纹的形成过程螺纹的类型螺纹的基本参数TheformationprocessofthreadsThetypeofthreadBasicparametersofthreads目录CONTENTS

螺纹联接是一种广泛使用的可拆卸的固定联接，具有结构简单、联接可靠、装拆方便等优点。Screwconnectionisawidelyuseddetachablefixedconnection,whichhastheadvantagesofsimplestructure,reliableconnection,andconvenientassemblyanddisassembly.螺纹副：内、外螺纹配对使用。Threadpair:usedinpairswithinternalandexternalthreads.外螺纹Externalthread内螺纹internalthread内螺纹internalthread外螺纹Externalthread

1螺纹的形成过程TheformationprocessofthreadsONE

一、螺纹的形成过程Theformationprocessofthreads右螺旋线的形成Formationofrighthelix左螺旋线的形成FormationofLeftHelix螺纹的形成Formationofthreads在圆柱或园锥表面上，沿着螺旋线形成的具有规定牙型的连续凸起。Acontinuousprotrusionformedalongahelixonthesurfaceofacylinderorconewithaspecifiedtoothshape.

一、螺纹的形成过程Theformationprocessofthreads大径Majordiameter中径pitchdiameter小径pathway牙顶crest牙底Dentalbase外螺纹Externalthread内螺纹internalthread牙顶crest牙底Dentalbase

2螺纹的类型Thetype