Sau da yawa ana buƙatar argon backflush don walda bututun ƙarfe da bututu ta amfani da hanyoyin gargajiya kamar walda mai kariya daga gas tungsten arc (GTAW) da walda mai kariya daga ƙarfe (SMAW). Amma farashin gas da lokacin saita aikin tsaftacewa na iya zama mahimmanci, musamman yayin da diamita da tsayin bututu ke ƙaruwa.
Lokacin walda ƙarfe mai kauri 300 Series, 'yan kwangila za su iya kawar da fashewar baya a cikin walda tushen tushen ta hanyar canzawa daga GTAW ko SMAW na gargajiya zuwa tsarin walda mai ci gaba, yayin da suke kiyaye walda masu inganci, kiyaye juriya ga tsatsa, da kuma cika Takaddun Tsarin Walda (WPS).) suna buƙatar tsarin walda mai kauri (GMAW). Ingantaccen tsarin GMAW na gajeren zango kuma yana ba da ƙarin aiki, inganci da fa'idodi masu sauƙin amfani don taimakawa wajen ƙara riba.
Saboda juriyarsu ga tsatsa da ƙarfi, ana amfani da ƙarfen ƙarfe mai kauri a aikace-aikacen bututu da bututu da yawa, gami da mai da iskar gas, sinadarai na petrochemicals, da man fetur na biofuels. Duk da cewa ana amfani da GTAW a aikace-aikacen ƙarfe mai kauri da yawa, yana da wasu rashin amfani waɗanda za a iya magance su ta hanyar ingantaccen tsarin GMAW na gajere.
Na farko, tunda akwai ƙarancin ƙwararrun masu walda, samun ma'aikata da suka saba da GTAW ƙalubale ne da ke ci gaba da tasowa. Na biyu, GTAW ba shine tsarin walda mafi sauri ba, wanda ke hana kamfanoni neman haɓaka yawan aiki don biyan buƙatun abokan ciniki. Na uku, yana buƙatar dogon lokaci da tsada na bututun ƙarfe mai jure ruwa.
Menene martani? Tsaftacewa shine shigar da iskar gas yayin aikin walda don cire gurɓatattun abubuwa da kuma samar da tallafi. Tsaftacewa ta gefen baya tana kare bayan walda daga samuwar oxides masu nauyi a gaban iskar oxygen.
Idan ɓangaren baya bai kasance mai kariya ba yayin walda a cikin magudanar tushe mai buɗewa, lalacewar tushe na iya faruwa. Wannan rugujewar ana kiranta saccharification saboda yana haifar da saman da ke kama da sukari a cikin walda. Don hana ƙafewa, mai walda yana saka bututun iskar gas a ƙarshen bututun kuma yana toshe ƙarshen bututun da bawul ɗin tsaftacewa. Sun kuma ƙirƙiri hanyar iska a ɗayan ƙarshen bututun. Hakanan yawanci suna sanya tef a kusa da buɗewar haɗin gwiwa. Bayan tsaftace bututun, sun cire tef a kusa da haɗin gwiwa suka fara walda, suna maimaita tsarin cirewa da walda har sai an kammala tushen bead.
A kawar da koma-baya. Komawa baya na iya kashe lokaci da kuɗi mai yawa, a wasu lokuta ana ƙara dubban daloli ga wani aiki. Sauya zuwa tsarin GMAW mai sauri yana bawa kamfanin damar yin amfani da tushen hanya ba tare da yin amfani da shi ba a aikace-aikacen ƙarfe da yawa. Walda 300 series bakin ƙarfe ya dace da wannan, yayin da walda douplex bakin ƙarfe masu tsarki a halin yanzu yana buƙatar GTAW don tushen hanya.
Kiyaye shigar zafi ƙasa gwargwadon iko yana taimakawa wajen kiyaye juriyar tsatsa na kayan aikin. Hanya ɗaya ta rage shigar zafi ita ce rage adadin wucewar walda. Tsarin GMAW na gajerun hanyoyin sadarwa kamar adana ƙarfe mai sarrafawa (RMD®) suna amfani da canja wurin ƙarfe mai sarrafawa daidai don tabbatar da ajiyar ɗigon ruwa iri ɗaya. Wannan yana sauƙaƙa wa mai walda ya sarrafa wurin walda, wanda hakan ke daidaita shigar zafi da saurin walda. Ƙarancin shigar zafi yana bawa wurin walda damar daskarewa da sauri.
Saboda yadda aka sarrafa sarrafa ƙarfe da kuma daskarewar wurin walda cikin sauri, wurin walda ba shi da hayaniya sosai kuma iskar kariya tana fita daga tocilar GMAW cikin sauƙi. Wannan yana bawa iskar kariya damar ratsa tushen da aka fallasa, yana tilasta yanayi ya kuma hana yin sukari ko iskar shaka a ƙasan wurin walda. Wannan rufewar iskar gas yana ɗaukar ɗan lokaci kaɗan saboda kududdufin suna daskarewa da sauri.
Gwaji ya nuna cewa tsarin GMAW na gajeren zango da aka gyara ya cika ƙa'idodin ingancin walda yayin da yake kiyaye juriyar tsatsa ta bakin ƙarfe na walda tushen GTAW.
Sauya tsarin walda yana buƙatar kamfanin ya sake tabbatar da WPS, amma irin wannan sauyawar na iya haifar da babban riba na lokaci da kuma tanadin kuɗi akan sabbin ayyukan kera da gyara.
Walda tushen da aka buɗe ta amfani da tsarin GMAW mai ci gaba yana ba da ƙarin fa'idodi a cikin yawan aiki, inganci da ilimin walda. Wannan ya haɗa da:
Yana kawar da yiwuwar samun hanyoyin zafi saboda yuwuwar ƙara ƙarfin ƙarfe don ƙara kauri na tushen magudanar ruwa.
Kyakkyawan juriya ga matsi mai yawa da ƙarancin motsi tsakanin sassan bututu. Tare da sauƙin canja wurin ƙarfe, wannan tsari zai iya cike gibin har zuwa inci 3/16 cikin sauƙi.
Tsawon baka yana nan ba tare da la'akari da tsawaitawar lantarki ba, wanda hakan ke rama wahalar da masu aiki ke sha wajen kiyaye tsawaitawa akai-akai. Wurin walda mai sauƙin sarrafawa da kuma canja wurin ƙarfe iri ɗaya na iya rage lokacin horo ga sabbin masu walda.
Rage lokacin aiki don canza tsari. Ana iya amfani da waya da iskar gas iri ɗaya don tushen, cikawa da rufe hanyoyin. Ana iya amfani da tsarin GMAW mai pulsed muddin an cika hanyoyin kuma an rufe su aƙalla 80% da iskar argon.
Don ayyukan dawo da bakin karfe, yana da mahimmanci a bi mahimman shawarwari guda biyar don samun nasarar sauyawa zuwa tsarin GMAW mai gajeren zango.
Tsaftace bututun ciki da waje don cire duk wani gurɓataccen abu. Yi amfani da goga mai waya wanda aka ƙera don bakin ƙarfe don tsaftace bayan haɗin gwiwa aƙalla inci 1 daga gefen.
Yi amfani da ƙarfe mai ƙarfi na bakin ƙarfe kamar 316LSi ko 308LSi. Yawan sinadarin silicon yana ƙara jika wurin walda kuma yana aiki azaman mai cire oxidation.
Domin samun sakamako mafi kyau, yi amfani da cakuda iskar gas mai kariya wanda aka tsara musamman don aikin, kamar kashi 90% na helium, kashi 7.5% na argon, da kashi 2.5% na carbon dioxide. Wani zaɓi kuma shine kashi 98% na argon da kashi 2% na carbon dioxide. Mai samar da iskar gas mai walda na iya samun wasu shawarwari.
Domin samun sakamako mai kyau, yi amfani da tip ɗin mazugi da tip ɗin tushen magudanar ruwa don gano wurin da iskar gas ɗin ke rufewa. Nozzle mai mazugi mai watsa gas a ciki yana ba da kyakkyawan kariya.
Lura cewa amfani da tsarin GMAW mai gajeren zango wanda aka gyara ba tare da iskar gas mai dawowa ba yana haifar da ɗan ƙaramin ƙura a ƙasan walda. Yawanci yana lalacewa yayin da walda ke yin sanyi kuma ya cika ƙa'idodin inganci na masana'antar mai, tashoshin wutar lantarki da sinadarai masu amfani da man fetur.
Jim Byrne manajan tallace-tallace ne da aikace-aikace na Miller Electric Mfg. LLC, 1635 W. Spencer St., Appleton, WI 54912, 920-734-9821, www.millerwelds.com.
Tube & Pipe Journal 于1990 年成为第一本致力于为金属管材行业服务的杂志。 Mujallar Tube & Pipe 1990 Tube & Pipe Journal стал первым журналом, посвященным индустрии металлических труб в 1990 году. Jaridar Tube & Pipe ta zama mujallar farko da aka keɓe ga masana'antar bututun ƙarfe a shekarar 1990.A yau, ita ce kawai mujallar masana'antu a Arewacin Amurka kuma ta zama tushen bayanai mafi aminci ga ƙwararrun masana'antar bututu.
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