专业英语21-24

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1、21.ThelatheVocabulary:lathe[leiT]车床ordinary[5C:dinEri]普通的carryout完成,实现,执行versatile[5vE:sEtail]通用的workshop[5wE:kFCp]车间capable[5keipEbl]有能力的component[kEm5pEunEnt]成分headstock[5hedstCk]主轴箱tailstock[`teilstCk]尾架tool-post刀架，刀座cross-slide横向拖板job[dVCb]工件matter[5mAtE]有关系,要紧sidewards[`saidwEdz]横着

2、,向旁边地saddle[5sAdl]溜板箱carriage[5kAridV]溜板箱accommodate[E5kCmEdeit]提供turret[5tQrit]转动架，转塔revolve[ri5vClv]旋转twist[5twist]扭曲incorporate[in5kC:pEreit]合并center[5sentE]顶尖spindle[5spindl]主轴largely[5lB:dVli]主要地matter[5mAtE]有关系,要紧taper[5teipE]锥形nose[nEuz]前端firmly[5fE:mli]稳固的uniform[5ju:nifC:m]统一的r

3、ough[5rQf]粗糙的chuck[tFQk]卡盘lead-scerw丝杠feed-shaft进给杆finishingcut精加工finish[5finiF]光洁度、粗糙度front-plate花盘jaw[dVC:]夹爪drill[5dril]钻孔bore[5bC:]镗孔thread[Wred]螺纹transverse[5trAnzvE:s]横向的engage[in5^eidV]连结，接合，啮合pitch[pitF]螺距alter[5C:ltE]改变reverse[ri5vE:s]反向的reversinglever反向手柄original[E5ridVEnEl]最初

4、的Text:Thelatheisoneofthemostusefulandversatilemachineintheworkshop,andiscapableofcarryingoutawidevarietyofmachiningoperations.Themaincomponentsofthelathearetheheadstockandtailstockatoppositeendsofabed,andatool-postbetweenthemwhichholdsthecuttingtool.Thetool-poststandsonacross-slidewhich

5、enablesittomovesidewardsacrossthesaddleorcarriageaswellasalongitdependingonthekindofjobitisdoing.Theordinarycenterlathecanaccommodateonlyonetoolatatimeonthetool-post,butaturretlatheiscapableofholdingfiveormoretoolsontherevolvingturret.Thelathebedmustbeverysolidtopreventthemachinefromben

6、dingortwistingunderstress.Theheadstockincorporatesthedrivingandgearmechanism,andaspindlewhichholdstheworkpieceandcausesittorotateataspeedwhichdependslargelyonthediameteroftheworkpiece.Abaroflargediametershouldnaturallyrotatemoreslowlythanaverythinbar;thecuttingspeedofthetooliswhatmatter

7、s.Taperedcenterinthehollownoseofthespindleandofthetail-stockholdtheworkfirmlybetweenthem.Afeed-shaftfromtheheadstockdrivesthetool-postalongthesaddle,eitherforwardsorbackwards,atafixedanduniformspeed.Thisenablestheoperatortomakeaccuratecutsandtogivetheworkagoodfinish.Gearsbetwee