Tooj welding
Cov txheej txheem ntawm vuam tooj liab (uas feem ntau hu ua kev lag luam ntshiab tooj liab) suav nrog roj vuam, phau ntawv carbon arc vuam, phau ntawv arc vuam thiab phau ntawv argon arc vuam, thiab cov qauv loj tuaj yeem siv vuam vuam.
1.Qhov feem ntau siv tooj liab roj vuam vuam yog lub pob tw, thiab cov sib tshooj sib tshooj thiab T sib koom ua ke yuav tsum siv tsawg li tsawg tau. Ob hom vuam hlau tuaj yeem siv rau kev siv roj vuam. Ib qho yog vuam hlau uas muaj cov khoom deoxygenation, xws li cov xov hlau 201 thiab 202; lwm yam yog ib tug dav tooj liab hlau thiab ib tug txiav sawb ntawm lub hauv paus khoom, thiab cov neeg sawv cev roj 301 yog siv raws li flux. Cov nplaim nruab nrab yuav tsum tau siv thaum cov roj vuam tooj liab.
2.Cov tooj liab tooj liab hlau qws tooj liab 107 yog siv rau kev tuav arc vuam, thiab cov tub ntxhais vuam yog tooj liab (T2, T3). Cov npoo ntawm qhov vuam yuav tsum tau ntxuav ua ntej vuam. Thaum lub thickness ntawm lub vuam yog ntau tshaj 4 hli, preheating yuav tsum tau preheated ua ntej vuam, thiab lub preheating kub yog feem ntau nyob ib ncig ntawm 400 ~ 500 ℃. Thaum vuam nrog tooj liab 107 vuam pas nrig, lub hwj huam mov yuav tsum tau thim rov qab los ntawm DC.
3.Short arcs yuav tsum tau siv thaum vuam, thiab vuam pas nrig yuav tsum tsis txhob viav vias horizontally. Lub vuam pas nrig ua rau ib qho kev tawm suab reciprocating, uas tuaj yeem txhim kho qhov tsim ntawm vuam. Qhov ntev weld yuav tsum maj mam welded. Qhov vuam ceev yuav tsum ceev li sai tau. Thaum lub sij hawm ntau txheej vuam, lub slag nruab nrab ntawm cov khaubncaws sab nraud povtseg yuav tsum tau muab tshem tawm tag nrho. Vuam yuav tsum tau nqa tawm nyob rau hauv ib qho chaw zoo-ventilated los tiv thaiv tooj liab lom. Tom qab welding, siv lub taub hau rauj los kais lub vuam kom tshem tawm kev ntxhov siab thiab txhim kho qhov zoo ntawm qhov vuam.
4.Manual argon arc vuam ntawm tooj liab. Thaum phau ntawv argon arc vuam ntawm tooj liab, cov xov hlau siv yog hlau 201 (tshwj xeeb tooj liab vuam hlau) thiab hlau 202, thiab kuj siv tooj liab hlau, xws li T2.
Ua ntej welding, oxide zaj duab xis, roj thiab lwm yam av nyob rau hauv vuam npoo ntawm lub workpiece thiab saum npoo ntawm cov hlau yuav tsum tau muab ntxuav kom tsis txhob muaj qhov tsis xws luag xws li pores thiab slag inclusions. Cov txheej txheem tu muaj xws li kev tu txhua yam thiab tshuaj ntxuav. Thaum lub thickness ntawm lub pob tw pob tw yog tsawg dua 3 hli, lub bevel tsis qhib; Thaum lub phaj thickness yog 3 mus rau 10 hli, lub V-shaped bevel yog qhib, thiab lub bevel lub kaum sab xis yog 60 mus rau 70; Thaum lub thickness ntawm lub phaj yog ntau tshaj 10 hli, lub X-shaped bevel yog qhib, lub bevel kaum sab xis yog 60 ~ 70; kom tsis txhob unwelded, blunt npoo feem ntau yog sab laug. Raws li lub phaj thickness thiab bevel loj, sib dhos sib txawv ntawm lub pob tw ob leeg yog xaiv nyob rau hauv qhov ntau ntawm 0.5 mus rau 1.5 hli.
Kev tuav tooj liab argon arc vuam feem ntau yog siv DC zoo txuas, uas yog, tungsten electrode txuas nrog qhov tsis zoo electrode. Txhawm rau tshem tawm cov cua qhov thiab xyuas kom ntseeg tau tias kev sib xyaw ua ke thiab nkag mus ntawm cov hauv paus hniav, nws yog ib qho tsim nyog yuav tsum tau ua kom cov vuam ceev, txo cov argon noj, thiab preheat qhov vuam. Thaum lub phaj thickness tsawg dua 3 hli, qhov preheating kub yog 150 ~ 300 ℃; Thaum lub phaj thickness ntau dua 3 hli, qhov kub thiab txias yog 350 ~ 500 ℃. Qhov kub preheating yuav tsum tsis txhob siab dhau, txwv tsis pub cov khoom siv ntawm cov welded pob qij txha yuav raug txo.
Kuj tseem muaj tooj liab carbon arc vuam, thiab cov electrodes siv rau carbon arc vuam muaj xws li carbon essence electrodes thiab graphite electrodes. Cov hlau vuam siv rau tooj liab carbon arc vuam yog tib yam li thaum vuam vuam. Cov khoom siv hauv paus kuj tuaj yeem siv los txiav cov strips, thiab cov khoom siv tooj liab xws li tus neeg sawv cev roj 301 tuaj yeem siv.
Brass welding
1.Cov txheej txheem ntawm tooj dag vuam muaj xws li: roj vuam, carbon arc vuam, phau ntawv arc vuam thiab argon arc vuam. 1. Gas welding ntawm tooj dag Vim tias qhov kub ntawm cov roj vuam nplaim yog qhov tsawg, cov zinc evaporation ntawm tooj dag thaum lub sij hawm vuam yog tsawg dua thaum siv hluav taws xob vuam, yog li cov roj welding yog feem ntau siv txoj hauv kev siv tooj dag (ua tsaug rau kev them nyiaj rau Dingding Automatic Vuam).
Cov vuam hlau siv rau tooj dag vuam muaj xws li: hlau 221, hlau 222 thiab hlau 224. Cov vuam hlau no muaj cov khoom xws li silicon, tin, hlau, thiab lwm yam, uas tuaj yeem tiv thaiv thiab txo cov evaporation thiab hlawv ntawm zinc nyob rau hauv lub pas dej molten, thiab yog qhov tsim nyog los xyuas kom meej qhov vuam. Kev ua tau zoo thiab tiv thaiv huab cua qhov. Fluxes feem ntau siv hauv cov roj welding tooj dag suav nrog cov hmoov av thiab cov roj flux. Gas flux muaj boric acid methyl rog thiab methanol; fluxes yog xws li tus neeg sawv cev roj 301.
2.Manual arc vuam ntawm tooj dag Ntxiv nrog rau tooj liab 227 thiab tooj liab 237, cov khoom siv hauv tsev kuj tseem siv tau rau vuam tooj dag.
Thaum tooj dag arc vuam, DC fais fab mov zoo txuas txoj kev yuav tsum tau siv thiab vuam pas nrig yuav tsum txuas nrog qhov tsis zoo electrode. Qhov saum npoo ntawm qhov vuam yuav tsum tau ua tib zoo ntxuav ua ntej vuam. Lub kaum sab xis yuav tsum tsis pub tsawg tshaj 60 ~ 70o. Txhawm rau txhim kho kev tsim cov vuam, cov welded qhov chaw yuav tsum tau preheated ntawm 150 ~ 250 ℃. Luv arc vuam yuav tsum tau siv thaum lub sij hawm ua hauj lwm, tsis muaj kab rov tav los yog pem hauv ntej thiab rov qab viav vias, tsuas yog linear zog, thiab vuam ceev yuav tsum siab. Brass welded qhov chaw uas tuaj rau hauv kev sib cuag nrog corrosive media xws li dej hiav txwv thiab ammonia yuav tsum tau muab tshem tawm tom qab vuam kom tshem tawm cov kev ntxhov siab welding.
3.Manual argon arc vuam ntawm tooj dag. Kev tuav argon arc vuam ntawm tooj dag tuaj yeem siv tus qauv tooj dag xov hlau: hlau 221, hlau 222 thiab hlau 224, thiab cov khoom siv nrog cov khoom siv tib yam li cov khoom siv hauv paus kuj tuaj yeem siv los ua cov ntaub ntawv muab tub lim.
Vuam tuaj yeem ua los ntawm cov khoom siv hluav taws xob ncaj qha lossis AC. Thaum siv AC welding, evaporation ntawm zinc yog sib dua dua thaum txuas ncaj qha tam sim no. Feem ntau, preheating tsis tsim nyog ua ntej welding, thiab preheating tsuas yog thaum lub thickness ntawm lub phaj kuj loj. Qhov vuam ceev yuav tsum ceev li sai tau. Tom qab vuam, cov welded qhov chaw yuav tsum tau rhuab ntawm 300 ~ 400 ℃ rau annealing kom tshem tawm welding kev nyuaj siab los mus tiv thaiv cov kab nrib pleb nyob rau hauv lub welded qhov chaw thaum siv.
4.Brass carbon arc vuam Thaum tooj dag carbon arc vuam, hlau 221, hlau 222, hlau 224 thiab lwm yam vuam hlau raug xaiv raws li cov khoom siv hauv paus. Koj tseem tuaj yeem siv cov tooj dag welding hauv tsev rau welding. Tus neeg sawv cev roj 301 lossis cov zoo li tuaj yeem siv los ua cov flux hauv vuam. Lub vuam yuav tsum tau ua luv luv arc kom txo cov zinc evaporation thiab hlawv puas.
Lub sij hawm xa tuaj: Mar-10-2025