Welding bakin karfe tubing da bututu sau da yawa yana bukatar baya-pure tare da argon lokacin amfani da al'ada matakai kamar gas tungsten arc waldi (GTAW) da garkuwa karfe arc waldi (SMAW) .Amma farashin gas da kuma saitin lokaci na tsarkakewa tsari na iya zama da muhimmanci, musamman kamar yadda bututu diamita da tsawo girma.
Lokacin walda 300 jerin bakin karfe, 'yan kwangila na iya kawar da busawa a cikin buɗaɗɗen tushen canal welds ta hanyar canzawa daga GTAW na gargajiya ko SMAW zuwa ingantaccen tsarin walda, yayin da har yanzu suna samun ingancin walda mai girma, kiyaye juriyar lalata kayan, da haɗuwa da ƙayyadaddun ƙayyadaddun Welding (WPS) yana buƙatar gajeriyar tsarin iskar gas (GMAW) gajeriyar tsari. amfani a cikin yawan aiki, inganci da sauƙin amfani, yana taimakawa wajen inganta riba.
Favored for su lalata juriya da kuma ƙarfi, bakin karfe gami da ake amfani da da yawa bututu da tubing aikace-aikace, ciki har da man fetur da gas, petrochemical, da kuma biofuels. Yayin da GTAW aka al'ada amfani a da yawa bakin karfe aikace-aikace, yana da wasu disadvantages cewa za a iya magance ta inganta short-kewaye GMAW.
Na farko, yayin da ƙarancin ƙwararrun masu walda ke ci gaba, gano ma'aikatan da suka saba da GTAW shine ƙalubalen da ke gudana.Na biyu, GTAW ba shine tsarin walda mafi sauri ba, wanda ke hana kamfanoni neman haɓaka yawan aiki don biyan buƙatun abokin ciniki.Na uku, yana buƙatar ɗaukar lokaci da tsada mai tsada na bututun ƙarfe.
Menene busawa?Purge shine shigar da iskar gas yayin aikin walda don kawar da gurɓataccen abu da ba da tallafi.Tsarin baya na baya yana kare bayan walda daga samar da oxides mai nauyi a gaban iskar oxygen.
Idan bayan baya ba a kiyaye shi a lokacin buɗaɗɗen tushen canal na tushen ba, lalacewar substrate na iya haifar da lalacewa. Wannan rushewar ana kiransa saccharification, don haka sunansa saboda yana haifar da wani wuri mai kama da sukari a cikin walda. Don hana mashing, welder yana shigar da bututun iskar gas a ƙarshen bututu kuma ya toshe ƙarshen bututu tare da dam ɗin tsaftacewa. ya kashe wani yanki na tef a kusa da haɗin gwiwa kuma ya fara waldawa, yana maimaitu tsarin cirewa da walda har sai tushen dutsen ya cika.
Cire busawa.Retraces na iya kashe lokaci mai yawa da kuɗi, a wasu lokuta ƙara dubban daloli zuwa aikin.Transitioning zuwa ingantaccen tsarin GMAW na ɗan gajeren lokaci yana ba kamfanin damar kammala tushen fasinja ba tare da jujjuyawa ba a cikin aikace-aikacen bakin karfe da yawa.Welding aikace-aikacen 300 jerin bakin karfe sun dace sosai don wannan, yayin da walƙiya aikace-aikacen aikace-aikacen tushen GMAW mai ƙarfi a halin yanzu.
Tsayawa shigarwar zafi a matsayin ƙananan kamar yadda zai yiwu yana taimakawa wajen kula da juriya na lalata na workpiece.Rage yawan adadin waldi shine hanya ɗaya don rage yawan shigarwar zafi.Ingantattun matakan GMAW na gajeren lokaci, irin su Ƙarfe Ƙarfe (RMD®), yi amfani da daidaitaccen canja wurin karfe don samar da kayan aiki na kayan aiki na uniform.Wannan yana sa ya zama sauƙi ga welder don sarrafa saurin shigarwar zafi, wanda a cikin juzu'in shigarwar zafi mai zafi. don daskare da sauri.
Tare da sarrafawa karfe canja wuri da sauri waldi pool daskarewa, da weld pool ne kasa m da garkuwa gas bar GMAW gun gwada da undisturbed.This damar garkuwa gas wucewa ta cikin bude tushen, displacing yanayi da kuma hana saccharification ko hadawan abu da iskar shaka a kan baya na weld.This gas ɗaukar hoto ne kawai daukan wani gajeren lokaci domin puddles daskare sosai da sauri.
Gwaji ya nuna cewa gyare-gyaren tsarin GMAW na gajeriyar kewayawa ya dace da ma'aunin ingancin walda yayin da yake kiyaye juriyar lalata bakin karfe kamar lokacin da aka yi wa tushen dutsen dutse da GTAW.
Canji a cikin tsarin walda yana buƙatar kamfani don sake tabbatar da WPS ɗin sa, amma irin wannan canjin zai iya ba da babban dawowar lokaci da tanadin farashi don sabbin masana'antu da aikin gyarawa.
Buɗe tushen walƙiya ta amfani da ingantaccen tsarin GMAW na ɗan gajeren lokaci yana ba da ƙarin fa'idodi a cikin haɓaka aiki, inganci da horarwar walda. Waɗannan sun haɗa da:
Yana kawar da yuwuwar tashoshi masu zafi sakamakon samun damar saka ƙarin ƙarfe don ƙara kauri daga tushen tashar.
Kyakkyawan haƙuri ga babba da ƙananan rashin daidaituwa tsakanin sassan bututu.Sakamakon canja wurin karfe mai santsi, tsarin zai iya sauƙaƙe raguwa har zuwa 3⁄16 inci.
Tsawon Arc yana da daidaituwa ba tare da la'akari da tsawo na lantarki ba, wanda ke ramawa ga masu aiki waɗanda ke gwagwarmaya don kiyaye tsayin daka. Tsarin walda mai sauƙin sarrafawa da daidaitaccen canjin ƙarfe na iya rage lokacin horo ga sabbin masu walda.
Rage raguwa don canje-canjen tsari. Ana iya amfani da waya iri ɗaya da iskar gas don tushen, cikawa da tashoshi na cap. Za a iya amfani da tsarin GMAW mai pulsed idan an cika tashoshi kuma an rufe shi da akalla 80% argon garkuwar gas.
Don ayyukan da ke son kawar da koma baya a aikace-aikacen bakin karfe, yana da mahimmanci a bi mahimman shawarwari guda biyar don nasara lokacin canzawa zuwa tsarin GMAW gajere da aka gyara.
Tsaftace ciki da waje na bututu don cire duk wani gurɓataccen abu.Yi amfani da goga na waya da aka tsara don bakin karfe don tsaftace bayan haɗin gwiwa aƙalla 1 inch daga gefen.
Yi amfani da ƙarfe mai cike da bakin karfe tare da babban abun ciki na silicon, kamar 316LSi ko 308LSi. Mafi girman abun ciki na silicon yana taimakawa weld pool wetting kuma yana aiki azaman deoxidizer.
Don mafi kyawun aiki, yi amfani da cakuda gas mai kariya da aka tsara musamman don tsari, irin su 90% helium, 7.5% argon, da 2.5% carbon dioxide. Wani zaɓi shine 98% argon da 2% carbon dioxide. Mai samar da iskar gas na iya samun wasu shawarwari.
Don sakamako mafi kyau, yi amfani da tukwici da bututun bututun ruwa don tushen tashoshi don gano abin rufewar iskar.
Yi la'akari da cewa yin amfani da tsarin GMAW da aka gyara ba tare da goyan bayan iskar gas ba yana haifar da ƙananan ma'auni a bayan walda. Wannan yawanci yana raguwa yayin da walda ya kwantar da hankali kuma ya dace da ƙa'idodi masu kyau don man fetur, wutar lantarki da aikace-aikace na petrochemical.
Jim Byrne shine Manajan Talla da Aikace-aikace na Miller Electric Mfg. LLC, 1635 W. Spencer St., Appleton, WI 54912, 920-734-9821, www.millerwelds.com.
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