普通车床的数控改造（电气部分）摘要：文章针对现有常规普通车床的缺点提出了数控改造方案和微机数控系统设计提高加工精度和扩大机床使用范围，并提高生产率。本论文说明了普通车床的数控化改造的设计过程，简单介绍了机械部分的改造，包括机械传动系统中主传动系统、主轴编码器和进给传动系统的改造。较详尽地阐述了西门子802S数控系统的组成，介绍了通过利用西门子802S系统对微机数控部分进行设计改造，主要包括数控系统的选择、机床纵、横向进给传动系统设计计算、步进电机的选择以及电气控制部分设计等，结果表明，改造后的机床拥有较完备的数控功能和较好的加工性能，抗干扰能力强，可靠性提高，能适应更广泛的加工要求，满足了中小企业对形状复杂，精度要求较高零件的加工需要，大大提升了企业的竞争力，此项改造给企业每年带来直接经济效益近五十万，取得了很好的社会效益。关键词：普通车床数控改造步进电机经济型数控系统数控刀架CA6140ordinarylatheofnumericalcontroltechnologytransformation(electrical)Abstract：AimingattheexistingshortcomingsofconventionalCA6140ordinarylathecontrolschemeproposedandcomputernumericalcontrolsystemdesign,theimprovementofthemachiningaccuracyandexpandthescopeofuseofmachinetools,andtoincreaseproductivity.ThispaperillustratesthegeneralreformofCNClathe,simpledesignprocessisintroduced,includingmechanicalpartofmechanicaltransmissionsysteminmaintransmissionsystem,andtodriveshaftencodersystemtransformation.ItexpoundedSiemens802Snumerical-controlledsystem,introducesthecompositionofSiemens802Ssystembyusingthemicrocomputercontrolpartsdesign,includingthechoiceofsystem,NCmachinetoolsinverticalandhorizontaltransmissionsystemdesign,selectionofsteppingmotorandelectricalcontrolpartdesign,theresultsshowthatthemachinehasacompleteNCmachiningfunctionandgoodperformance,stronganti-jammingcapability,reliability,canadaptthebroaderprocessingrequirementsofsmallandmedium-sizedenterprises,andtomeetthecomplexshape,highprecisionmachiningneeds,greatlyimprovedthecompetitivenessofenterprises,themodificationtoenterpriseyearbringsdirecteconomicbenefits,nearlyhalfthegoodsocialbenefits.Keywords：OrdinarylatheCNCtransformationSteppingmotorEconomicalCNCsystemCNCturret目录目录1绪论................................................................11.1课题背景..........................................................11.2机床改造的内容及意义..............................................11.2.1研究意义......................................................11.2.2主要研究内容及技术路线........................................21.2.3数控化改造后机床的优越性......................................21.3机床的经济型数控化改造主要解决的问题.............................22数控系统的选择.......................................................42.1开环数控系统......................................................42.2闭环数控系统......................................................42.3半闭环数控系统....................................................43机械部分的改造......................................................64步进电机的选择......................................................84.1步进电动机的选用原则.............................................84.1.1步距角α......................................................84.1.2精度..........................................................94.1.3转矩..........................................................94.1.4启动频率......................................................94.2纵向步进电机的选择............................
