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时间:2020-12-16
《最新零件公差材料上课讲义.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、零件名称常用材料一般热处理要求定位圈45HRC45-50浇口套T8A、T10AHRC53-57定模座板、动模座板、垫块Q235 定模板、动模板45HRC30-35型芯、型腔(镶件)CrWMn、Cr12MoV等HRC53-58导柱、导套T8A、T10AHRC50-55推杆(推管)拉料杆、复位杆T8A、T10AHRC50-55推板、推件杆固定板、支承板、推件板 45HRC30-35序号相关配合零件配合松紧程度配合要求配合尺寸测量值1定位孔 H9/f9 定位圈2浇口套 H7/m6 定模板3导套 H7/m6 定模板4导柱 H7/m6 动模板5导柱 H7/f7 导套6型芯、型腔 H7/m6 动模
2、板、定模板7拉料杆、复位杆等 H7/f7 动模板Thedaywaslikeanyotherdayinhislife,Tomwalkedpasttheshoponthestreetcomer.Hestoppedtolookatthefrontrowofshoes,andhefelthappytoseethatthepairofshoeshewantedverymuchwerestillthere.Lookingdown,hefeltsorryforhimself.Hereallywantedtohavethemforhisbirthday.Hesadlywalkedawayandthou
3、ghthowtotellhismotheraboutit.Heknewshewouldgivehimanythinghelikedifshecould.Buthealsoknewverywellshehadlittlemoney.Hedecidednottogohomeatonce,ashelookedworriedandhismotherwouldnotice(注意)it.Sohewenttotheparkandsatonthegrass.Thenhesawaboyinawheelchair(轮椅).Henoticedthattheboymovedthewheelwithhishan
4、ds.Tomlookedathimcarefullyandwassurprisedtoseetheboyhavenofeet.Helookedathisownfeet.“It'smuchbettertobewithoutshoesthanwithoutfeet,”hethought.Therewasnoreason(理由)forhimtofeelsosorryandsad.Hesentawayandsmiled,thinkinghewashappier.1.Tompassedtheshop______. A.onfoot B.bybusC.bybike D.inacar2.Whydi
5、dTomstopinfrontoftheshop?Becausehewanted______.[] A.tobuytheshoes B.tolookattheshoesheliked C.tolookattheshoesintheshopwindow D.tolookattheshoesonthefrontrow3.Thepairofshoeshelikedwas______.[] A.tooexpensiveB.quitecheap C.notthere D.notsoldyet4.Tomwentintotheparkbecausehe______.[] A.wasthink
6、inghowtotellhismotheraboutitB.wantedtoseetheboy C.didn'twanttomakehismotherworried D.hefeltsad5.FromthestorywecanknowthatTom______.[] A.likednewshoesverymuch B.lovedhismotherbest C.didn'twanttogotoschool D.didn'twanttostayathome<2>Peoplesometimesliketoreadstoriesofdogsverymuch.Theythinkthatd
7、ogsaremuchclevererthancats,sheep,cowsorotheranimalsintheirhomes.Oneofmyclosefriends,Bob,hasaverylargepolicedognamedJack.EverySundayafternoon,BobandJackhaveawalkintheparknearby.Jacklikesthesewalksverymuch.OneSundayafternoon,I
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