初中物理教具制作

校长为学校学生道路交通安全工作第一责任人，负责校（园）内的道路交通安全管理工作和学生出行的道路交通安全教育，以及学生春(秋)游和其他教育教学活动的道路交通安全管理工作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,初中物理教具制作自制教具能有效辅助教学，能帮助一线教师顺利完成个性教学。深感好教材、好教法需配上合适的教具才能相得益彰，一套“合适”的教具可以使教学内容更有根据、使教学过程更加生动有趣、使教学更有效。一、既然有厂家生产教具，为何还要自制教具（因为自制的教具要比买的好）⑴厂制教具的不足：①教具要求:对使用群体信息了解不够，不可能设计出教学所需求的仪器。②“量产”周期：研发速度落后于教材改编和教育教学的需求。“量产”周期：（最短也要2年），教学大赛允许创新实验研制时间（最长为3～4周）③追求利润：厂家以营利为目的。利润较低的教具：虽然教学是急需的，但是厂家不愿意生产。造价昂贵的教具：厂家利润高，但是，学校受教学经费制约，无力配备。⑵自制教具的优势:①将演示实验转化为学生实验。（让学生已有的生活经验再现，激发学习兴趣。）②改进原有的实验教具。（让实验现象学生看的真、看的清、操作更简便，更具有教学的实效性）二、怎样自制教具1.自制教具应关注的几个要点：(1)安全性(强调:无安全隐患)用电安全：设计学生实验时，尽可能以低压电源替代高电压。使用群体需求研发验证机专家鉴定修改样机群体试用修改样机教育装备部门的鉴定认可厂家量产配发到学校视频1校长为学校学生道路交通安全工作第一责任人，负责校（园）内的道路交通安全管理工作和学生出行的道路交通安全教育，以及学生春(秋)游和其他教育教学活动的道路交通安全管理工作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,化学安全：熟悉化学物质技术参数，严格控制用量，充分做好实验安全防范措施。毛刺安全：手能触接到实验器材部分，应圆滑。(2)科学性意义浅明：应从众多实验方法中精选，直接体现实验原理的方法。构造简单：除去多余部分，凸显主体部件，体现实验的直观性。(3)实用性实验可靠：实验现象稳定，器材可反复多次使用，学生实验器材尽可能制成全封闭结构。操作方便：仪器的调试、实验步骤操作简单。(权重最大）制作方便：取材、自制容易。(4)趣味性：（寓教于乐，提高学习兴趣）2.自制教具步骤（1）选题要“准”（作“必要性”和“可行性”的认证）群策群力认真研究教材教法，对现有现实验器材的缺陷，提出改进要求，通过专利网搜索作“必要性”和“可行性”的认证。（2）构思要“简”根据选题内容难度，构思能力，灵活运用构思方法。物理实验功能要求，张主芳老师提出：中学物理实验具有“情景性功能、体验性功能、探究性功能、应用性功能”等四大功能，（3）绘图要“精”将构思呈现在图纸上，作初步的“可行性”的认证。（4）加工要“细”①严格按图纸设计要求加工（在精度误差允许范围内进行加工）。连接：（专业和普通连接---略）木与木---白乳胶、金属与玻璃---无影胶、选题构思绘图加工验证样品产品校长为学校学生道路交通安全工作第一责任人，负责校（园）内的道