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ID:36027599
大小:343.03 KB
页数:23页
时间:2019-04-30
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1、毕业设计论文作者王磊学号系部计算机科学系专业SMT题目波峰焊接及其缺陷分析指导教师评阅教师完成时间:毕业设计(论文)中文摘要22题目:波峰焊接及其缺陷分析摘要:波峰焊是指将熔化的软钎焊料(铅锡合金),经电动泵或电磁泵喷流成设计要求的焊料波峰,亦可通过向焊料池注入氮气来形成,使预先装有元器件的印制板通过焊料波峰,实现元器件焊端或引脚与印制板焊盘之间机械与电气连接的软钎焊,也可称为群焊或流动焊。这种焊接方法主要用于传统通孔插装工艺,以及表面组装与通孔插装元器件的混装工艺,适合波峰焊的表面贴装元器件有矩形和圆柱形片式元件、SOT以及较小的SOP器件等
2、。本文通过介绍波峰焊的定义、工艺方式、过程分析、缺陷分析等,提出波峰焊接的各种缺陷以及解决的各种方法。关键词:波峰焊缺陷分析22毕业设计(论文)外文摘要Title:WaveSolderingIntroductionandItsDefectAnalysisAbstract:Wavesolderingreferstothesoftmeltsolderingmaterial(leadtinalloy),theelectricpumporelectromagneticpumpsprayflowintothedesignrequirementssolde
3、r,italsocanthroughpeakstoinjectnitrogentoformsolderspool,withcomponentsinadvancebythewave,PCBsolderingweldingsideorofcomponentswithpinsPCBpadofmechanicalandelectricalconnectionbetweenthesoftbrazing,canalsobecalledgroupofweldingorflowwelding.Thiskindofweldingmethodismainlyuse
4、dintraditionalthrough-holecartridgeprocess,aswellassurfaceassemblyandthrough-holecartridgecomponentsfordualwavesolderingprocess,SMTcomponentsarerectangularandcylindricalelectroniccomponent,SOTandsmallerSOPdevices,etc.Thispaperintroducesthedefinition,wavesolderingprocessmetho
5、d,processanalysis,defectanalysisintheoperatingprocessandputsforwardthemethodsofsolderingdefectandsolvedallkindsofthesolderingdefects.Keywords:WaveSolderingDefectsAnalysis22目录毕业设计(论文)中文摘要···········································1毕业设计(论文)外文摘要·································
6、··········21引言······························································42波峰焊工艺························································42.1波峰焊的定义················································42.2波峰焊的种类················································52.3波峰焊接原理··········
7、······································63波峰焊组成及设备简介··············································83.1波峰焊机的组成··············································83.2波峰焊设备简介··············································94波峰焊流程及作用·················································105波峰焊
8、中助焊剂的工艺方式·········································12226波峰焊接工艺参数设置及温度曲线解析···
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