数控车床主传动设计[1].doc

摘要
PAGEIV
摘要
数控车床不仅能够车外圆还能用于镗孔、车端面、钻孔与铰孔。与其他品种的机床比拟，车床在生产中使用最广。
本论文首先介绍了我国数控机床发展的过程与现状,并分析了其存在的问题;对数控机床的发展趋势进行了探讨；并对JIFCNC-B数控车床主轴箱传动零碎进行了设计与计算。
主轴箱有安装在精密轴承中的空心主轴和一系列变速齿轮组成。数控车床主轴可以获得在调速范围内的任意速度，以满足加工切削要求。
目前，数控车床的发展趋势是通过电气与机械安装进行无级变速。变频电机通过带传动和变速齿轮为主轴提供动力。通常变频电机调速范围3—5，难以满足主轴变速要求；串联变速齿轮则扩大了齿轮的变速范围。
本设计将本来的带轮不卸荷结构变为了带轮卸荷结构，使输入轴在带处只受转矩，将轴上的径向力传动到车床机体上,改善了输入轴的受力情况，。

关键词：主轴箱，无级调速，传动零碎
Abstract
Abstract
NClathecandoboring,facing,drillingandReaminginadditiontoturning.Theuseoflathesintheproductionthantheothertypesofmachinetoolsandmore.Andcomparedtoothertypesofmachinetools,lathesintheproductionisthemostwidelyused.
Inthisdesign，thedevelopmentandcurrentsituationofNCmachineinChinawasintroducedandaseriesofproblemswerepresented.ThedevelopmenttrendtoNClathewasdiscussed.SomecountermeasureswaspresentedforthedevelopmentofNCmachineinChinaandthentheheadstockofJIFCNC-BNClathehasbeencalculatlydesigned.Headstocksiscomposedofthehollowspindlewhichisinstalledinprecisionbearingsandaseriesoftransmissiongears.Thespindlecanobtainanyspeedinthespeedrangetomeettheprocessingrequirementsofcutting.
Atpresent,thedevelopmenttrendistoprovideacontinuouslyvariablespeedthroughtheelectricalormechanicaldevices.VariableFrequencyMotorconveysthepowerthroughbeltdriveandasetoftransmissiongears.ThespeedrangeofVariableFrequencyMotorisusually3-5,whichisdifficulttomeetthespeedrangerequirementsofthespindlespeed;Thetransmissiongearsistoexpandthescopeofavariable-speedtomeetthespeedrangeofthespindle
Inaddition,inthisdesignthedesignofthebeltdrivehasbeenchangedfromtheoriginalunloadingstructureintotheloadingstructure,transmissedtheforcetothelathebodysothatinputshaftisonlyforcedtorque,improvedtheforcingstateoftheinputshaft.
Keywords:headstocks,acontinuouslyvariablespeed,transmissionSysterm

目录

目录
摘要 Ⅰ
Abstract（英文摘要） Ⅱ
目录 Ⅲ
TOC\o\t"标题3,3,标题4,4"第一章绪论 1
1.1数控车床主传动零碎的要求 1
1.2数控车床主传动零碎方式 1
1.3国内外数控车床主传动零碎的发展 2
1.3.1设数控车床发展总趋势.................................2
1.3.2确中国数控车床发展的主要问题........................4
TOC\o"1-