大型客车车身结构及焊接工艺分析(二)（analysis of body structure and welding technology of large bus）

《大型客车车身结构及焊接工艺分析(二)（analysis of body structure and welding technology of large bus）》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、大型客车车身结构及焊接工艺分析(二)（Analysisofbodystructureandweldingtechnologyoflargebus）AnalysisofbodystructureandweldingtechnologyoflargebusThenon-bearingchassisstructureissimpler,whichistheflatplatestructureofvariousrectangularsteelpipesandsections.Thereverseclampingfixtureorhorizontalfixtureweldingcanbeuse

2、d.Itisconvenientandeconomicaltorolltheclampingfixture,andtheweldingdeformationissmall,butthefabricationcostofthefixtureishigh.Thewholebearingbodyframeisthegrilletypespacestructure,theclampingdeviceadoptsfixedtype.Toensuretheassemblyaccuracyoftheleft/rightskeleton,theassemblysizeofthelargenumber

3、ofthebaseafterweldingisrequired.Intheproduction,twomethodsareusedtoguarantee:oneistoimprovetheprecisionofthesizeofthematerialandtheweldingjig,andthenthesmallamountofmanualgrindingtoachievetheassemblyprecision.Anotheristouseawalkingautomaticcuttertocompletetheprocess.Thelattermethodproduceshighe

4、fficiency,buttheequipmentinvestmentisbigger.Thesixlargeframeweldingbodyweldingisthekeyprocessinthecarbodywelding.Theprocessnotonlydeterminestheprecisionoftheassemblydimensionofthebusbodyhexahedron,butalsothethroatprocedurethatrestrictstheproductivityoftheweldingline.Inordertoimprovetheassemblya

5、ccuracyandproductionefficiency,thedomesticandforeignadvancedpassengercarfactoryadoptsthespecialassemblyequipmenttocompletethepositioningofthebodyhexahedron.Theequipmentiscomposedofthebodybottompositioningmechanism,theleft/rightskeletonclampingmechanism,thefront/rearpositioningmechanism,thetopli

6、ftinggearandthepowersystem.Theequipmentcanbedividedintotwotypes:passandnon-pass,dependingonwhetherthetransportmechanismofthevehiclebodyispassedbetweenthefittingequipment.Thestructureofthefittingequipmentisrelativelycomplex,anditsbasepositioningmechanismiscomposedofthewholeprocessvehicleandtheli

7、ftingunit.Theintegratedprocessvehicleisaveryhighprecisionbaseclampingpositioningandtransportationmechanism.Thepositioningdevicecanbeadjustedtomeetthepositioningrequirementsofdifferentsizes.Afterthewholeprocessvehicleisloadedwithth