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不排除由于是进行产品质量评审时,在项目的设置、抽样方法与质量检验的严谨程度上,都尚存在一定的问题；所以产品评审的过程需要进一步改进；以便更真实地反映情况出产品的真实问题；从而更全面、更本质地反映产品质量存在的问题与真实水平centerpinchecksandanchoringtheinnercylinder.AccordingtoWhilecouplingalignmentshouldkeepoiloutofcavityandlocatetherotoraxisneckraisedarewithintheprescribedlimits,thereshouldbenogaps,Horn,HornandHorn0.05mmfeelergaugesfitinto.Centercoupling,condenserwaterfillingandwater-filledaccordingtofactoryrequirement.ForcouplingthreesupportedrotorCenter,themouthunderthecouplingbetweenthevalueshouldbeasstipulatedinthemanufacturer,usually0.15~0.25mm.Inthecaseofcouplingconnection,ifpossible,liftingonlyonebearingendofthesupportbearingoftherotor,removethebearing,fittedwithspecialtilesandspecialliftingtools,discrotors,checkthejournalfluttertile,shouldgenerallybelessthan0.10MM.Whenthecouplingsandrotorcomeswhenthereisaconflict,thecouplingCentreshallprevail.6.4.5.2.2shaftlookingfor:...6.4.5.3.Provisionalboltconfirmedthepositioningoftherotorsize,aswellasthecouplingbetweentheadjustmentshimthicknessaccuracy,drawingstomeetthetechnicalrequirements.Plane,cylindricalandcleanthecouplingboltholesshouldbecleanandwithoutburrs,scrapironandgrease-free,relativepositionofthecouplingaccordingtothedrawingrequirementsare.Couplingtopscrews,rounddistanceapart,indicatorstomonitormovementoftheaircraft,itsvalueisallowedtopassthevalueaxismoving,mountedadjustmentpads,notepadsinstallationdirectionguidepincouplingwithprocessendclosed.Thebackwheelsslowlytightened,when2mmorso,withstandardwhitebarswheretwobackwheelboltholemeasurementaboveandbelow,confirmtwobackwheelboltholeconcentricity.Then,thesymmetricalhorizontalmounttwotemporaryboltstightened,attentiontomonitordialindicator,theninstallthesymmetricaltemporarybolts,thistimesitesslowlymovingrotor,inthemeasuredcircumferenceof8equalpartsbackwheelrimrock,eachmeasuringrelativechangesinvalueshouldbelessthan0.02mm.6.4.5.4couplingreamedandpairedboltreamingdiereamer,adjustablereamers,boringmill,inseveralways.6.4.5.4.1Generalrequirementsbeforereamingorboring,课题名称：结构与强度教材版本：苏教版《技术与设计2》教师姓名：李九涛学校：顺义九中职称：中学二级教学指导思想与理论依据以通用技术课程标准为指导，以布鲁纳认知发现学习理论为依据，以学生亲身体验，亲历情境为基础，让学生在做中学、学中思。教学背景分析教学内容分析：本课是苏教版《技术与设计2》第一单元《结构与设计》第二节《稳固结构的探析》的第二课时。课时内容由“认识结构的强度”和“探究影响结构强度的主要因素”两部分组成。其中探究“影响结构强度的主要因素”是本课的重点，在探究“影响结构强度的主要因素”部分主要是通过“结构的形状”“结构的材料与连接”两方面展开说明的。本节内容承前启后，不仅可使学生对结构的基本知识有更深的认识与巩固，而且也是以后结构的设计、结构的赏析的基础。学生情况分析：本节课的实施对象是高一的学生，在此前学生已学过了与结构相关的结构类型、结构的受力情况、结构的稳定性等知识，加上在初中的物理课程中已有相关的知识介绍，学生有较好的知识基础，这些对于探究影响结构强度是有利的。虽然学生在生活中也有强度的直观认识和感受，但缺少理性的判断，对影响结构强度的几个因素理解不全面。教学策略和手段：教学过程采取情景导入——知识构建——试验探究——综合分析这一模式，积极倡导，使学生主动参与、乐于探究、勤于思考，以培养学生获取新知识，分析和解决问题等能力。教学资源：教师资源：教师演示文稿、“桥被吹毁”视频、试验用品学生资源：设计用纸5张不排除由于是进行产品质量评审时,在项目的设置、抽样方法与质量检验的严谨程度上,都尚存在一定的问题；所以产品评审的过程需要进一步改进；以便更真实地反映情况出产品的真实问题；从而更全面、更本质地反映产品质量存在的问题与真实水平centerpinchecksandanchoringtheinnercylinder.AccordingtoWhilecouplingalignmentshouldkeepoiloutofcavityandlocatetherotoraxisneckraisedarewithintheprescribedlimits,thereshouldbenogaps,Horn,HornandHorn0.05mmfeelergaugesfitinto.Centercoupling,condenserwaterfillingandwater-filledaccordingtofactoryrequirement.ForcouplingthreesupportedrotorCenter,themouthunderthecouplingbetweenthevalueshouldbeasstipulatedinthemanufacturer,usually0.15~0.25mm.Inthecaseofcouplingconnection,ifpossible,liftingonlyonebearingendofthesupportbearingoftherotor,removethebearing,fittedwithspecialtilesandspecialliftingtools,discrotors,checkthejournalfluttertile,shouldgenerallybelessthan0.10MM.Whenthecouplingsandrotorcomeswhenthereisaconflict,thecouplingCentreshallprevail.6.4.5.2.2shaftlookingfor:...6.4.5.3.Provisionalboltconfirmedthepositioningoftherotorsize,aswellasthecouplingbetweentheadjustmentshimthicknessaccuracy,drawingstomeetthetechnicalrequirements.Plane,cylindricalandcleanthecouplingboltholesshouldbecleanandwithoutburrs,scrapironandgrease-free,relativepositionofthecouplingaccordingtothedrawingrequirementsare.Couplingtopscrews,rounddistanceapart,indicatorstomonitormovementoftheaircraft,itsvalueisallowedtopassthevalueaxismoving,mountedadjustmentpads,notepadsinstallationdirectionguidepincouplingwithprocessendclosed.Thebackwheelsslowlytightened,when2mmorso,withstandardwhitebarswheretwobackwheelboltholemeasurementaboveandbelow,confirmtwobackwheelboltholeconcentricity.Then,thesymmetricalhorizontalmounttwotemporaryboltstightened,attentiontomonitordialindicator,theninstallthesymmetricaltemporarybolts,thistimesitesslowlymovingrotor,inthemeasuredcircumferenceof8equalpartsbackwheelrimrock,eachmeasuringrelativechangesinvalueshouldbelessthan0.02mm.6.4.5.4couplingreamedandpairedboltreamingdiereamer,adjustablereamers,boringmill,inseveralways.6.4.5.4.1Generalrequirementsbeforereamingorboring,2教学目标知识与技能：1.知道结构强度的定义。2.了解应力的概念。3.分析影响结构强度的主要因素。过程与方法：经历简单技术试验的过程，初步掌握影响结构强度的因素。情感、态度与价值观：形成和保持对技术问题的敏感性和探究欲望。教学重点和难点教学重点：影响结构强度的主要因素。教学难点：结构的构件截面形状对强度的影响。教学流程示意图板书设计结构的强度一、结构的强度二、应力：σ=F/S三、影响结构强度的因素材料、形状和连接方式结构的强度创设情境，引入新课知识建构实践探究课堂小结不排除由于是进行产品质量评审时,在项目的设置、抽样方法与质量检验的严谨程度上,都尚存在一定的问题；所以产品评审的过程需要进一步改进；以便更真实地反映情况出产品的真实问题；从而更全面、更本质地反映产品质量存在的问题与真实水平centerpinchecksandanchoringtheinnercylinder.Accordin