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1、制造工程与技术ManufacturingEngineeringandTechnology%1.填空题15*2chillzone表血等轴晶区columnarzone柱状晶区equiaxedzone等轴晶区flask砂箱cope上型箱drag下型箱partingline分型线apouringbasinorpouringcup浇口杯runnersystem浇注系统risers冒口cores型芯vents排气孔taper锥度draftangle拔模斜度flash飞边indirect反挤压extrusion正挤压hydrostatic静液挤压（havenofr
2、ictionforce）thermoset热固性arcwelding电弧焊TypesofSandMolds.Sandmoldsarecharacterizedbythetypesofsandthatcomprisethemandbythemethodsusedtoproducethem.Therearethreebasictypesofsandmolds:green-sand,cold-box,andno-bakemolds.砂型模地类型.砂型模是以组成他们地砂地类型和生产他们所使用地方法为特色地.有三种基本类型地砂型模：湿砂型，冷砂型，和自硬型砂型
3、.ThreebasictypesofinjectionmoldsA,thecold-runnertwo-platemoldB,thecold-runnerthree-platemold,inwhichtherunnersystemisseparatedformthepartwhenthemoldopens:C,thehot-runnermold,inwhichthemoltenplasticiskepthotinaheatedrunnerplate注射模有三种基本地类型冷浇口双板式冷浇口三板式热浇口%1.判断改错10*2Expendablemolds
4、—次铸型Coiningneedsnolubricant精压不用润滑剂Notethatthewordsformingandshapingarebothusedinthetitleforthissection.Althoughthedistinctionbetweenthetwoisnotrigid,formingmeanschangingtheshapeofanexistingsolidbody.Thebody,whichiscalledtheworkpiece,stock,orblankthroughouttherestofthistext,mayb
5、eintheshapeofaplate,asheet,abar,wire,ortubingofvariouscross-sections.注意这部分在标题中一齐使用地成型和塑造二词•尽管这两个词地区别并不明确,成型意味着改变既有固体板材地形状.板材就是贯穿本文剩余部分所谓地工件，坯料，板材，也可以呈板，薄板，条料，杆，线材或者各种横截面地管材.（formingandshaping土也区另UShapingprogressesusuallyinvolvedmoldingandcasting.塑造工艺通常包含造型和浇铸）Aparameterdescribi
6、ngtheshapeoftheextrudedproductisthecircumscribingcirclediameter用來描述挤压件形状地参数是外接圆直径（CCD）.Thecomplexityofanextrusionisafunctionoftheratiooftheperimeteroftheextrudedproducttoitscross-sectionalarea,knownastheshapefactor.挤压件形状地复杂程度和它外圆地直径与截面积之比有关，我们将其称为形状系数.F=YavgAfIn（A0/Af）Electrosl
7、agweldingisaspecialtypeofsubmergedarcweldingusedtojoinsectionsofsteelplatefrom25to350mminthickness.Theweldingheatisgeneratedbytheresistaneeoftheslagtotheflowofelectriccuirentfromthefillerwiretotheworkpieces.Fluxiscontinuouslyfedintotheweldareawhereitformsamoltenslagfloattoshiel
8、dtheweldmentfromoxidation.电渣焊是埋弧焊地一种特殊形式，它常常用来连接厚度在25到
