- Kev phom sij ntawm kev siv vuam ntau dhau ntawm cov kav dej welded
1. Cov kab nrib pleb kev nyuaj siab tuaj yeem tshwm sim ntawm cov ntiv taw weld
Qhov kev ntxhov siab ntawm lub pob tw pob qij txha feem ntau yog tshwm sim los ntawm qhov kev sib txuas ntxiv. Kev ntxhov siab ntawm cov ntiv taw ntawm lub pob tw yog qhov loj tshaj plaws.
Qhov luaj li cas ntawm qhov kev ntxhov siab coefficient nyob ntawm qhov vuam qhov cuab lub zog h, lub kaum sab xis θ ntawm cov ntiv taw vuam thiab kaum lub vojvoog r. Raws li qhov vuam qhov cuab lub zog h nce, lub kaum sab xis θ nce thiab tus nqi r txo qis, uas yuav ua rau muaj kev ntxhov siab ntau ntxiv.
Qhov loj dua qhov kev txhawb zog ntawm cov welded, qhov hnyav dua qhov kev ntxhov siab, thiab lub zog ntawm cov welded sib koom yuav txo qis. Tom qab vuam, ntev npaum li qhov siab tshaj qhov siab tsis qis dua li ntawm cov hlau hauv paus, nws tuaj yeem txo qhov kev ntxhov siab thiab qee zaum txhim kho lub zog ntawm qhov sib koom ua ke.
2. Sab nraud weld seam yog siab dhau, uas tsis yog qhov zoo rau kev tiv thaiv corrosion
Yog tias epoxy resin iav daim ntaub siv los tiv thaiv corrosion thaum lub sijhawm ua haujlwm, cov txheej txheem weld seam yuav loj, ua rau nws nyuaj rau nias lub vuam ntiv taw kom ruaj khov. Nyob rau tib lub sijhawm, qhov siab dua qhov vuam, qhov tuab ntawm cov txheej tiv thaiv corrosion yuav tsum yog. Vim hais tias tus qauv tau teev tseg tias cov thickness ntawm cov txheej txheem tiv thaiv corrosion yog ntsuas raws li qhov vertex ntawm cov txheej txheem weld, uas ua rau cov nqi tiv thaiv corrosion.
Thaum lub sij hawm muab kauv submerged arc vuam, "ntses qaum" txheej welds feem ntau nws tshwm sim, uas ua rau nws nyuaj dua los xyuas kom meej qhov zoo ntawm anti-corrosion. Yog li ntawd, nws tseem yog ib qho tseem ceeb uas yuav tau kho qhov chaw spatial thiab vuam specifications ntawm lub vuam taub hau kom txo los yog tshem tawm cov "ntses qaum-zoo li tus" sab nraud welds.
3. Lub weld seam sab nraud muaj qhov loj tshaj qhov siab, uas cuam tshuam rau cov yeeb nkab zoo tom qab hydraulic expansion.
Thaum qhov ncaj seam submerged arc welded yeeb nkab yog hydraulically nthuav, cov yeeb nkab steel yog qhwv los ntawm sab laug thiab sab xis txheej pwm uas nws cov kab noj hniav yog zoo ib yam nrog txoj kab uas hla expansion ntawm cov yeeb nkab steel. Yog li ntawd, yog hais tias lub zog ntawm lub weld loj dhau lawm, lub shear stress endured los ntawm lub weld yuav ntau dua thaum lub cheeb yog nthuav, thiab cov phenomenon ntawm "me me ncaj ntug" yuav yooj yim tshwm sim ntawm ob sab ntawm lub weld.
Txawm li cas los xij, kev paub dhau los tau ua pov thawj tias thaum qhov kev txhawb nqa ntawm cov khoom siv sab nraud yog tswj ntawm li 2 hli, qhov "me me ncaj ntug" tshwm sim yuav tsis tshwm sim thaum lub sij hawm hydraulic expansion, thiab cov yeeb nkab zoo yuav tsis cuam tshuam. Qhov no yog vim qhov kev txhawb nqa ntawm cov weld sab nraud yog me me thiab cov shear stress endured los ntawm welded sib koom kuj yog me me. Tsuav qhov kev ntxhov siab no nyob rau hauv qhov elastic deformation ntau thiab rov qab tshwm sim tom qab tshem tawm, cov yeeb nkab yuav rov qab mus rau nws qhov qub.
4. Internal weld seam muaj qhov loj tshaj qhov siab, uas ua rau kom lub zog poob ntawm qhov nruab nrab conveying.
Yog hais tias sab hauv ntawm lub submerged arc welded yeeb nkab rau kev thauj mus los tsis yog coated thiab anti-corrosion kho, residual qhov siab ntawm sab hauv weld yuav loj, thiab kev sib txhuam tsis kam mus rau nruab nrab kev thauj mus los kuj yuav loj, uas yuav ua rau kom lub zog. kev siv cov raj xa dej.
- Tswj kev ntsuas rau weld reinforcement
1. Cov kav hlau uas muaj phab ntsa loj dua yuav tsum tau beveled
Rau cov kav hlau uas muaj phab ntsa thickness ntau dua 14.3mm, X-shaped grooves yuav tsum tau ua thiab pre-welded. Yog hais tias cov txheej txheem ua ntej vuam tsis paub tab, lub vuam txheej yuav tsum tau ua tiav rau hauv U-puab zawj ua ntej vuam los ntawm txoj kev xws li gouging, tsis siv neeg sib tsoo nrog lub log sib tsoo, los yog milling thiab tshem tawm hauv paus tom qab vuam.
2. Kho cov vuam kab hluav taws xob
Txhawm rau txheeb xyuas seb lub vuam kab hluav taws xob puas tsim nyog, cov qauv ntsuas cov kua qaub ntawm cov pob qij txha feem ntau yog siv los kuaj xyuas. Ib qho yog los xyuas qhov sib tshooj ntawm cov welds sab hauv thiab sab nraud, thiab lwm qhov yog los xyuas qhov dav ntawm lub duav ntawm cov hlaws weld. Cov kev cai rau qhov sib tshooj yog feem ntau ntau dua 1.5mm, tab sis tus sau ntseeg tias qhov sib tshooj ntawm cov welds sab hauv thiab sab nraud yog 1.3 txog 3.0mm. Yog tias nws siab tshaj 3.0mm, nws txhais tau tias cov kab hluav taws xob loj.
Lub zog linear siab txhais tau tias tsis yog tsuas yog qhov tob tob tob, tab sis kuj yog qhov txuas txuas ntxiv. Yog tias tsis muaj qhov zawj lossis U-puab zawj, qhov kev sib txuas ntawm lub vuam yuav ntau dua. Qhov no yog vim qhov loj dua qhov vuam kab hluav taws xob, ntau cov hlau molten yuav yaj hauv ib lub sijhawm. Rau high-strength steel, vuam kab zog yuav tsum nruj me ntsis tswj. Thaum welding high-strength steel daim hlau, thiaj li yuav txo tau lub linear zog ntawm txhua txheej, multi-pass welding (ntau tshaj 2 passes) feem ntau yog siv, thiab cov duab coefficient ntawm weld yuav tsum nyob rau hauv 1.3 mus rau 2. }} hli.
3. Nws raug nquahu kom siv cov xaim me me hauv ntej thaum vuam ntau cov xov hlau
Thaum siv cov hlau txuas ntau, yog tias tus thawj txoj kab uas hla ntawm peb lub welding sab nraud yog 4mm+3.2mm+3.2mm (DC-AC-AC), nws yog qhov zoo dua los hloov cov xaim pem hauv ntej. rau f3.2mm. Vim tias thaum siv tib yam tam sim no, qhov tob tob ntawm Ф3.2mm vuam hlau yog ntau dua li ntawm Ф4mm vuam hlau. Hauv lwm lo lus, yog tias cov xaim pem hauv ntej siv Ф3.2mm vuam hlau, txawm tias cov kab hluav taws xob txo qis, qhov kev nkag mus tib yam tuaj yeem ua tiav thaum siv Ф4mm. Qhov no yog vim qhov tam sim no qhov ntom ntom ntawm cov hlau nyias yog ntau dua li ntawm cov hlau tuab.
Kev paub dhau los tau ua pov thawj tias thaum lwm yam xwm txheej tsis hloov pauv, qhov nkag mus tob ntawm cov xaim pem hauv ntej siv Ф3.2mm yog li 20% ntau dua li ntawm Ф4mm pem hauv ntej xaim. Cov txiaj ntsig ntawm kev txo cov kev sib txuas sab nraud yog pom tseeb dua thaum lub vuam sab nraud tsis yog beveled lossis grooved.
Txawm li cas los xij, thaum welding steel kav nrog phab ntsa thickness ntau dua 14.3mm thiab pem hauv ntej xaim tam sim no yuav tsum nyob ib ncig ntawm 1000A, yuav tsum siv cov xaim pem hauv ntej ntawm Ф4 mm, txwv tsis pub qhov kev sib txuas ruaj khov ntawm lub arc yuav raug cuam tshuam.
4. Kauv vuam yuav tsum kho txoj hauj lwm ntawm lub puab thiab sab welding hau
Thaum muab kauv submerged arc welded kav yog welded sab hauv, txoj hauj lwm ntawm lub taub hau vuam sab hauv yuav tsum tau kho kom txo qis los yog tshem tawm cov "eeb-puab" sab hauv weld; Thaum welded sab nraud, qhov chaw ntawm lub taub hau vuam yuav tsum tau kho kom txo qis los yog tshem tawm cov "ntses-rov qab". "Sab nraud vuam seam, uas yog tsuas yog ua tiav los ntawm kev kho tus nqi eccentric ntawm qhov chaw vuam sab nraud. Rau kauv welded kav ntawm txawv diameters, eccentricity qhov tseem ceeb ntawm sab nraud vuam qhov sib txawv.
