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1、屋面钢结构焊接、吊装技术交底（Roofsteelstructureweldingandliftingtechnicaldisclosure）Noteoftechnicaldisclosure(formC2-2-1)numberT3-3OneConstructionname**1-3blockconstructionunit,Beijing*twosteelstructuralbranchcompanyMay10,2005Summary:roofsteelstructureweldingtechnicaldisclosureDisclosurecontent:steelstructureinst
2、allationweldingtechnicaldisclosureI.constructionpreparation:1.constructionmaterialsandmachines:1)weldingmaterial:E4303.Storage:shouldbeplacedinadry,wellventilatedwarehouse(roomtemperaturenotlessthan18C0,relativelywet)Itislessthan50%)andplacedawayfromthegroundandwallatleast300mm,soastopreventmoisture
3、fromdeterioration.Drying:dryingtemperatureis200degrees,heatpreservation1-1.5hours,afterdryingtheelectrodeisbestputintothestoragebox,soastousewith.Welder'sTheweldingrodisputintheheatpreservationbarrel.Twotimesdryingelectrodetemperatureof200degrees,timeis1hours,anddotheweldingrodDryingrecord.Weldingro
4、dapproachmusthavecertificate,accordingtoinstructionsforbaking.Prohibittheuseofdamp,skinpeelingAndtheelectrodeweldingcorerust.2)machine:ACarcweldingmachine,oven,thermostat,grindingmachine,heatpreservationcylinder,goggles,anglegrinder,wirebrush,Smallhammer,flatshovelandsoonTwo,constructionprocess1.wel
5、dingcurrentselection:Phi3.2mm100A~130APhi4mm160A~210A;2.weldingspeed:about15cm/min;3.assemblyconditions:100mmonbothsidesofweldseam,greaseandrustshouldbecleanedup;weldgapis6-8mm;4.welding,verticalweldingandoverheadweldingusingmulti-layersinglepassweldingmethod,horizontalweldingusingmultipassweldingme
6、thod.ThelocationofeachlaneHaveagoodgraspofit.Thebottombeadofgrooveshallbeweldedbyweldingelectrodeofnomorethan3.2mm,soastofacilitateweldingpenetration;5.weldinginstrictaccordancewiththeweldingsequence:firstweldingtheuppermainbeam,weldingthelowermainbeam;weldingthemiddlelayermainbeam;finally,thesteelc
7、olumnbuttwelding;Sequenceofweldingbetween6.steelcolumnandsteelcolumn:1)twoweldersinrelativepositions,isothermalandconstantspeedwelding.2)whenthesymmetricalsurfaceisappliedtothe3-4layerbead,thebeadiscl
