机械专业英语考试重点.doc

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1、解释:金属可分那两大类ferrousmetalsnonferrousmetals/CAD'CAM全称Computer-aideddesignComputer-aidedmanufacturing/齿轮的种类SpurgearHelicalgear/铸造I.艺包括几步MakemoldsPrepareandmeltthemetalPourthemetalintothemoldsCleanthecastings/列举儿种机械零件GearKeyShaftScrewCamBearingSpringWormgearset/皮带传动是否精确?为什么Inaccuracy,beltdrivesdependon

2、frictiononthepulleysandsomeslippageisinherentintheiroperation.1、柔性系统的主要功能Tocreatethecellsfromwhichthesystemistobeconstructed.2、金属分为哪两类SimplemetalsAlloys3、热处理的类型Annealing退火Tempering

3、口

4、火Quench淬火Normalizing正火4、热加工工艺有哪些Casting铸造Forging锻造Welding焊接5、传动扭矩的键包括Squarekey方键Taperedkey锥形键Woodruffkey半圆键6、车床的主要部

5、分Headstock主轴箱Tailstock尾座Toolpost刀架cross-slide横向托板7、主轴箱内有哪些部件机构Driving驱动Gearmechanism齿轮装置Spindle卡孺：8、龙门刨床的构件thebedthetablethecolumnthecrossrailthetoolhead9、尺寸标注有哪几种unilateraltolerancingbilateraltolerancinglimitdimensioning10、FMS的主要功能tocreatthecellsfromwhichthesystemistobeconstructed11、铸造工艺包括哪些makem

6、oldsprepareandmeltthemetalpourthemetalintothemoldscleanthecastings12、铢床的主要部件startingleverspindlecolumnkneeelevatingscrewtableindexheedspeedleverfeedlever13、塑料的优缺点plasticstendtoberesistanttoinorganicacids,butcanbedissolvedrdeformedbysolvents.mostplasticsarelessrigidthanmetals,whileplasticsareveryli

7、ght.Mostplasticsdonotconductheatorelectricityreadilyplasticssoftenslowlyandcaneasilybeshapedwhiletheyaresoft./刀具磨损的类型Flankwear后刀面磨损Craterwear前刀面磨损NotchwearV形凹口磨损Brittlefracture/edgechipping已解决的磨损形式/钢的力学性能Strength强度Stiffness刚度Ductility延展Impactstrength冲击强度Hardness硬度Toughness韧性翻译：对于深沟球轴承，沟槽的深度大约是球直•径

8、的1/4Indeep-grooveballbearings,theraces沟糟areapproximatelyonefourthasdeepastheballdiameter.,把金属件连接在一起的方.法有很多，用哪一种方.法要根据金属的种类和要连接的焊件的种类来定Thereareanumberofmethodsofjoiningmetalarticlestogether,dependingonthetypeofmetalandthestrengthofthejointwhichisrequired./软焊是要用熔融状态下的第三种金属来使两件金属连接在一起的工艺Solderingisth

9、eprocessofjoiningtwometalsbyathirdmetaltobeappliedinthemoltenstate.,力学性能是材料施加压力的反应特性Mechanicalpropertiesarethecharacteristicresponsesofamaterialtoappliedforces./用于冷作加工的机器叫压力机Themachineusedformostcold-workingopera