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1、航空港管理学院毕业设计（论文）指导手册2013年11月spotwelding,spotweldingfittingsmatmustbeplacedfirmlybefore,toavoidforcedgroupstoarise,additionalstresscausedbycrack.(5)theGroovepositionweldsandweldingthesameweldingprocessshouldbeadopted,byqualifiedWeldersandwelding.Tackwel
2、dshouldbeevenlydistributed,thereisgenerallynolessthan2-3,lengthshouldbeto10-15mm,uniformdistribution,wallthicknessofnomorethan2/3.(6)thetackshouldensuregoodpenetrationandfusion,andfreeofporosity,slagandotherdefects.(7)toensurethebottombeadmoldingwellt
3、oreducestressconcentration,tackshouldbeasmoothtransitiontothebasemetalandweldspolishedatbothendsshouldbegenerated.(8)unlesstheprocessorinspectionrequired-welded,buteachseamcontinuousweldingfinish,otherwiseagainbeforewelding,topreheattheweld.(9)theweld
4、ingarcscrapedsurfaceisstrictlyprohibited,withoutanyintroductionarcweldingonthesurface.(10)shouldensurethatthearcandarcweldingofquality,arcshouldfillcrater,multi-passweldingjointshouldbestaggered.(11)Tigweldingshouldbeventilatedinadvance,expiredafterwe
5、ldingshouldbedelayed,andshouldensurethattheweldingintheweldingprocessmeltstogeteffectiveprotectionofargongas.(12)whenusingthemulti-passwelding,weldbeforeshouldbecleaned,aftermakingsurethatnodefects,andagainthenext.(13)theweldshouldbeasmoothtransitiont
6、othebasemetalandweldbothendsgroundintoslope.(14)cardwiththewelding,thematerialshouldbeidenticaltothebasemetal,andatthetimeofdemolitioncardsshouldnotdamagematerialsandresiduesintheweldingscaronthebasemetalpolishedfixedflushtothebasemetal.(15)thefinishe
7、dweld,weld目录1航空港管理学院毕业设计（论文）工作流程11.1毕业设计（论文）工作流程11.2毕业设计（论文）完成步骤12毕业设计（论文）要求32.1内容要求32.2毕业设计（论文）答辩要求42.3毕业设计（论文）成绩评定43毕业设计（论文）评分标准53.1评定为优秀的标准53.2评定为良好的标准53.3评定为中等的标准53.4评定为及格的标准53.5评定为不及格的标准54毕业设计（论文）排版要求64.1毕业设计（论文）页面格式要求64.2毕业设计（论文）正文排版格式要求6附录A毕业设计
8、（论文）封面8附录B摘要模版9附录C目录模版11附录D毕业设计（论文）任务书13附录E毕业设计（论文）答辩书14附录F毕业设计（论文）选题一览表15spotwelding,spotweldingfittingsmatmustbeplacedfirmlybefore,toavoidforcedgroupstoarise,additionalstresscausedbycrack.(5)theGroovepositionweldsandweldingthesameweldingproc
