Cov txheej txheem los tiv thaiv thiab txo cov vuam deformation yuav tsum xav txog cov txheej txheem vuam tsim thiab kov yeej qhov kev hloov pauv ntawm qhov kub thiab txias mus rau lub sijhawm vuam.Shrinkage tsis tuaj yeem tshem tawm, tab sis nws tuaj yeem tswj tau.Muaj ntau ntau txoj hauv kev los txo cov shrinkage deformation.
1 Tsis txhob vuam ntau dhau
Cov hlau ntau dua nyob rau hauv lub vuam, qhov ntau dua qhov deformation quab yuam yuav raug generated.Qhov loj me me ntawm qhov vuam tuaj yeem tsis tsuas yog tau txais cov vuam me me deformation, tab sis kuj txuag cov khoom siv vuam thiab lub sijhawm.Tus nqi ntawm vuam hlau los sau cov vuam yuav tsum yog qhov tsawg kawg nkaus, thiab cov vuam yuav tsum tiaj tus lossis me ntsis convex.Cov hlau vuam ntau dhau yuav tsis ua kom lub zog.Ntawm qhov tsis sib xws, nws yuav ua rau kom lub zog shrinkage thiab nce qhov vuam deformation.
2 Tsis siv neeg vuam
Lwm txoj hauv kev los txo tus nqi ntawm cov khoom siv vuam yog siv cov vuam sib txuas ntau dua.Piv txwv li, thaum welding reinforced daim hlau, welding tsis tu ncua tuaj yeem txo qhov ntim ntawm cov vuam los ntawm 75%, thaum tseem ua kom lub zog xav tau.
3. Txo txoj kev vuam
Cov vuam nrog cov hlau ntxhib thiab tsawg dhau ntawm qhov muaj qhov me me deformation dua qhov vuam nrog nyias hlau thiab ntau dhau.Nyob rau hauv cov ntaub ntawv ntawm ntau dhau, lub shrinkage tshwm sim los ntawm txhua qhov hla accumulatively tsub kom tag nrho weld shrinkage.Raws li tuaj yeem pom los ntawm daim duab, cov txheej txheem vuam nrog tsawg dhau thiab tuab electrode muaj txiaj ntsig zoo dua qhov uas muaj ntau qhov hla thiab nyias electrode.
Lus Cim: Cov txheej txheem welding ntawm coarse hlau, tsawg dhau welding los yog nplua hlau, multi-pass vuam nyob ntawm cov khoom siv.Feem ntau, cov pa roj carbon tsawg, 16Mn thiab lwm yam ntaub ntawv tsim nyog rau cov hlau ntxhib thiab tsawg dua vuam.Stainless hlau, siab carbon steel thiab lwm yam ntaub ntawv yog haum rau nplua hlau thiab multi-pass vuam
4. Anti-deformation technology
Khoov los yog qaij cov khoom nyob rau hauv qhov kev taw qhia ntawm vuam deformation ua ntej welding (tshwj tsis yog rau invert vuam los yog ntsug vuam).Lub preset tus nqi ntawm rov qab deformation yuav tsum tau txiav txim los ntawm kev xeem.Prebending, presetting, los yog prearching welded qhov chaw yog ib txoj hauv kev yooj yim rau offset vuam kev nyuaj siab los ntawm kev siv cov khoom siv rov qab.Thaum lub workpiece yog preset, ib tug deformation tshwm sim uas ua rau lub workpiece nyob rau hauv opposite rau weld shrinkage stress.Lub preset deformation ua ntej vuam tshem tawm nrog lub deformation tom qab vuam, ua rau vuam workpiece ib lub dav hlau zoo tagnrho.
Lwm txoj hauv kev los sib npaug ntawm qhov sib npaug ntawm kev sib cog lus yog tso tib lub welders rau ib leeg thiab clamp lawv ua ke.Txoj kev no tseem tuaj yeem siv rau kev khoov ua ntej, qhov twg cov npoo tau muab tso rau hauv qhov tsim nyog ntawm lub workpiece ua ntej clamping.
Tshwj xeeb hnyav-lub luag hauj lwm welders muaj peev xwm tsim tau qhov yuav tsum tau sib npaug zog vim lawv tus kheej rigidity los yog txoj hauj lwm ntawm qhov chaw rau ib leeg.Yog tias cov kev sib npaug no tsis raug tsim tawm, lwm txoj hauv kev yuav tsum tau sib npaug ntawm lub zog shrinkage ntawm cov khoom siv vuam kom ua tiav lub hom phiaj ntawm kev sib nrig sib tshem tawm.Lub zog sib npaug tuaj yeem yog lwm qhov shrinkage quab yuam, txhua yam kev sib khi quab yuam tsim los ntawm fixture, binding quab yuam ntawm kev sib dhos thiab vuam ib ntus ntawm cov khoom, khi quab yuam tsim los ntawm lub ntiajteb txawj nqus.
5 Vuam Sequence
Raws li cov qauv ntawm lub workpiece los txiav txim ib tug tsim nyog los ua ke ib ntus, thiaj li hais tias tus qauv ntawm lub workpiece nyob rau hauv tib txoj hauj lwm shrinkage.Ob chav sided groove yog qhib nyob rau hauv lub workpiece thiab ncej, multi-txheej welding yog saws, thiab ob-sided welding sequence yog txiav txim.Kev sib tshuam welding yog siv nyob rau hauv fillet welds, thiab lub shrinkage nyob rau hauv thawj weld yog sib npaug los ntawm lub shrinkage nyob rau hauv lub thib ob weld.Lub fixture tuaj yeem tuav lub workpiece nyob rau hauv txoj hauj lwm uas xav tau, nce rigidity thiab txo vuam deformation.Txoj kev no yog dav siv nyob rau hauv vuam ntawm me me workpiece los yog me me Cheebtsam, vim qhov nce ntawm vuam kev nyuaj siab, tsuas yog haum rau cov yas qauv ntawm cov hlau tsis muaj carbon steel.
6 Tshem tawm lub zog shrinkage tom qab vuam
Percussion yog ib txoj hauv kev los tiv thaiv weld shrinkage, zoo li weld txias.Tapping yuav ua rau cov vuam txuas ntxiv thiab ua kom nyias nyias, yog li tshem tawm kev ntxhov siab (elastic deformation).Txawm li cas los xij, thaum siv txoj kev no, nws yuav tsum tau muab sau tseg tias cov hauv paus hniav ntawm cov vuam tsis tuaj yeem raug khob, uas yuav ua rau tawg.Feem ntau, percussion tsis tuaj yeem siv rau hauv cov welds.
Vim hais tias, lub npog txheej yuav muaj cov kab nrib pleb, cuam tshuam rau kev tshawb pom vuam, cov nyhuv hardening.Yog li ntawd, kev siv thev naus laus zis yog txwv, thiab tseem muaj qee zaus uas yuav tsum tau tapping tsuas yog nyob rau hauv ntau txheej dhau (tshwj tsis yog cov vuam hauv qab thiab npog vuam) los daws qhov teeb meem deformation lossis tawg.Kev kho cua sov kuj yog ib txoj hauv kev los tshem tawm lub zog shrinkage, tswj qhov kub thiab txias ntawm lub workpiece;Qee lub sij hawm tib lub workpiece rov qab rau rov qab clamping, vuam, nrog rau qhov kev sib dhos no kom tshem tawm cov kev ntxhov siab, kom cov workpiece residual stress tsawg.
6. Txo lub sijhawm vuam
Vuam ua cua sov thiab cua txias, thiab nws yuav siv sij hawm los hloov cov cua sov.Yog li ntawd, lub sij hawm tseem ceeb kuj cuam tshuam rau lub deformation.Feem ntau, nws yog ntshaw kom ua tiav qhov vuam kom sai li sai tau ua ntej cov khoom ua haujlwm ntau yog rhuab thiab nthuav dav.Cov txheej txheem vuam, xws li hom thiab qhov loj ntawm cov electrode, vuam tam sim no, vuam ceev thiab lwm yam cuam tshuam rau qib ntawm shrinkage thiab deformation ntawm vuam workpiece.Kev siv cov cuab yeej siv vuam tshuab txo cov sij hawm vuam thiab qhov deformation los ntawm tshav kub.
Thib ob, lwm txoj hauv kev los txo qhov vuam deformation
1 Dej txias thaiv
Ntau cov tswv yim tuaj yeem siv los tswj cov vuam deformation ntawm cov vuam tshwj xeeb.Piv txwv li, nyob rau hauv nyias daim ntawv vuam, kev siv cov dej-txias blocks yuav tshem tawm cov cua sov ntawm lub welded workpiece.Cov yeeb nkab tooj liab yog welded rau tooj liab fixture los ntawm brazing los yog soldering, thiab cov yeeb nkab yog txias nyob rau hauv kev mus rau txo vuam deformation.
2 Wedge block positioning phaj
"Positioning phaj" yog kev tswj xyuas zoo ntawm vuam deformation ntawm steel phaj taub qab vuam tshuab, raws li qhia hauv daim duab.Ib qho kawg ntawm qhov chaw phaj yog welded rau ntawm lub phaj ntawm lub workpiece, thiab lwm qhov kawg ntawm lub npoo thaiv yog wedged rau hauv lub phaj nias.Ntau qhov chaw phaj tuaj yeem npaj tau los tswj qhov chaw thiab kho ntawm vuam steel phaj thaum vuam.
3. Tshem tawm thermal stress
Tsuas yog nyob rau hauv cov xwm txheej tshwj xeeb, kev siv cua sov kom tshem tawm kev ntxhov siab tsis yog txoj kev raug, yuav tsum tau ua ua ntej lub workpiece yog welded los tiv thaiv los yog txo vuam deformation.
Third, Xaus
Txhawm rau txo qhov cuam tshuam ntawm vuam deformation thiab kev ntxhov siab seem, cov ntsiab lus hauv qab no yuav tsum tau them sai sai rau thaum tsim thiab vuam lub workpiece:
(1) Tsis muaj vuam ntau dhau;(2) Tswj qhov chaw ntawm lub workpiece;(3) Siv tsis tu ncua vuam kom deb li deb tau, tab sis yuav tsum ua kom tau raws li cov qauv tsim;(4) Raws li me me li qhov ua tau vuam ko taw loj;(5) Rau qhov qhib groove vuam, qhov vuam qhov sib koom yuav tsum raug txo kom tsawg, thiab ob sab zawj yuav tsum tau txiav txim siab los hloov ib qho kev sib koom ua ke;(6) Multi-layer thiab multi-pass vuam yuav tsum tau saws kom deb li deb tau los hloov ib txheej thiab ob sab vuam.Qhib ob sab groove vuam ntawm lub workpiece thiab ncej, txais yuav ntau txheej vuam, thiab txiav txim siab qhov sib txuas ntawm ob sab vuam;(7) ntau txheej tsawg dhau vuam;(8) Txais cov txheej txheem vuam uas tsis tshua muaj cua sov, uas txhais tau tias ntau dua melting tus nqi thiab ceev vuam ceev;(9) Lub positioner yog siv los ua lub workpiece nyob rau hauv lub nkoj-shaped vuam txoj hauj lwm.Ship-shaped vuam txoj haujlwm tuaj yeem siv txoj kab uas hla loj thiab cov txheej txheem fusion siab;(10) Kom deb li deb tau nyob rau hauv lub workpiece lub neutralization ncej teeb weld, thiab symmetrical vuam;(11) Raws li qhov ua tau los ntawm kev sib txuas ntawm vuam thiab vuam qhov chaw kom cov vuam kub sib npaug sib npaug;(12) Vuam mus rau qhov tsis muaj kev taw qhia ntawm lub workpiece;(13) Siv fixture, tooling thiab positioning phaj rau kev kho thiab tso.(14) Prebend lub workpiece los yog preposition lub vuam sib koom ua ke nyob rau hauv opposite kev taw qhia ntawm contraction.(15) Sib cais vuam thiab tag nrho cov vuam raws li qhov sib lawv liag, cov vuam tuaj yeem ua kom sib npaug ntawm qhov nruab nrab ntawm qhov nruab nrab.
Post lub sij hawm: Dec-19-2022