1. Abubuwan fasaha na argontungsten baka waldi
1.1 Zaɓi na'urar walda ta tungsten argon arc da polarity na wutar lantarki
Ana iya raba TIG zuwa bugun jini na DC da AC.DC pulse TIG ana amfani da shi ne wajen walda karfe, karfe mai laushi, karfe mai jure zafi da sauransu, kuma AC pulse TIG ana amfani da shi ne wajen walda karafa masu haske kamar aluminum, magnesium, jan karfe da sauran kayan su.Dukansu nau'ikan nau'ikan AC da DC suna amfani da samar da wutar lantarki tare da halayen juzu'i, kuma walda TIG na zanen bakin karfe yawanci yana amfani da haɗin kai na DC.
1.2 Abubuwan fasaha na manual argon tungsten arc waldi
1.2.1 Arc mai ɗaukar hankali
Akwai nau'ikan wutan baka guda biyu: rashin tuntuɓar juna da kuma ƙonewar gajeriyar kewayawa.Tsohuwar na'urar lantarki ba ta cikin hulɗa da kayan aikin kuma ya dace da duka DC da waldi na AC, yayin da na ƙarshe ya dace da waldi na DC kawai.Idan an yi amfani da hanyar gajeriyar hanya don buge baka, kada a fara baka kai tsaye akan walda, saboda yana da sauƙin haifar da haɗar tungsten ko haɗin gwiwa tare da kayan aikin, ba za a iya daidaita baka nan da nan ba, kuma baka yana da sauƙi shiga cikin kayan tushe, don haka ya kamata a yi amfani da farantin yajin baka.Sanya farantin jan karfe na jan karfe kusa da wurin baka, fara baka a kai da farko, sannan ka matsa zuwa bangaren da za a yi walda bayan tip tungsten ya yi zafi zuwa wani zazzabi.A cikin samarwa na ainihi, TIG yawanci yana amfani da farar baka don fara baka.A karkashin aikin bugun jini na yanzu, iskar argon yana ionized don fara arc.
1.2.2 Tack walda
Lokacin waldawar tack, wayar walda yakamata ta zama sirara fiye da na yau da kullun.Saboda ƙarancin zafin jiki da saurin sanyaya yayin waldawar tabo, baka yana tsayawa na dogon lokaci, don haka yana da sauƙin ƙonewa.Lokacin yin walda ta tabo, yakamata a sanya wayar walda akan wurin waldawar, kuma baka ya tsaya tsayin daka sannan a matsa zuwa wayar walda, sannan a dakatar da baka da sauri bayan wayar walda ta narke sannan ta hade da karfen tushe a bangarorin biyu.
1.2.3 Al'ada waldi
Lokacin da aka yi amfani da TIG na yau da kullun don walda bakin karfe, na yanzu yana ɗaukar ɗan ƙaramin ƙima, amma lokacin da halin yanzu bai wuce 20A ba, drift arc yana da sauƙin faruwa, kuma yanayin zafin cathode yana da girma sosai, wanda zai haifar da asarar zafi. a cikin walda yankin da matalauta electron watsi yanayi, sakamakon A cathode tabo ne kullum tsalle kuma yana da wuya a kula da al'ada soldering.Lokacin da pulsed TIG ake amfani da, kololuwar halin yanzu iya sa baka tsayayye, da directivity yana da kyau, da tushe karfe ne da sauki narke da kuma forming, da hawan keke ana musanya don tabbatar da santsi ci gaba na walda tsari.walda.
2. Weldability bincike na bakin karfe takardar
Abubuwan da ke cikin jiki da siffar takardar bakin karfe suna shafar ingancin walda kai tsaye.Bakin karfe takardar yana da ƙaramin ƙarfin zafin jiki da babban adadin faɗaɗa na layi.Lokacin da zafin walda ya canza da sauri, damuwa na thermal da aka haifar yana da girma, kuma yana da sauƙi don haifar da ƙonawa, yankewa da nakasar igiyar ruwa.Walda na bakin karfe zanen gado mafi yawa rungumi dabi'ar lebur butt waldi.Wurin narkakkar yana tasiri ne da karfin baka, da nauyi na narkakkar karfen tafkin da kuma tashin hankali na narkakkar karfen tafkin.Lokacin da girma, inganci da narkakkar nisa na narkakkar karfen tafki sun kasance akai-akai, zurfin tafkin ya dogara da baka.Girman, zurfin shigar ciki da ƙarfin baka suna da alaƙa da walƙiyar halin yanzu, kuma faɗin haɗin yana ƙaddara ta ƙarfin ƙarfin baka.
Ya fi girma girma na narkakken tafkin, mafi girma tashin hankali.Lokacin da surface tashin hankali ba zai iya daidaita da baka karfi da nauyi na narkakkar pool karfe, shi zai sa narkakkar pool ta ƙone ta, kuma shi za a mai tsanani da sanyaya a cikin gida a lokacin walda tsari, haifar da weldment zuwa Inhomogeneous danniya da iri, a lokacin da a tsaye gajarta da weld kabu sa danniya a gefen bakin bakin ciki farantin ya wuce wani darajar, shi zai haifar da mafi tsanani kalaman nakasawa da kuma rinjayar da siffar ingancin workpiece.A ƙarƙashin wannan hanyar walda da sigogi na tsari, ana amfani da nau'ikan nau'ikan lantarki daban-daban na tungsten don rage shigar da zafi akan haɗin gwiwar walda, wanda zai iya magance matsalolin ƙona walƙiya da nakasar aiki.
3. Aikace-aikace na manual tungsten argon baka waldi a bakin karfe takardar waldi
3.1 Ka'idar walda
Argon tungsten baka walda wani nau'i ne na buɗaɗɗen baka mai walƙiya tare da tsayayye da zafi mai ƙarfi.Karkashin kariyar iskar gas (argon gas), tafkin walda yana da tsabta kuma ingancin kabu mai kyau yana da kyau.Duk da haka, lokacin walda bakin karfe, musamman austenitic bakin karfe, bayan walda kuma yana buƙatar kariya, in ba haka ba mai tsanani oxidation zai faru, wanda zai shafi aikin walda da aikin walda.
3.2 Halayen walda
Walda na bakin karfe zanen gado yana da wadannan halaye:
1) Thermal watsin takardar bakin karfe ba shi da kyau, kuma yana da sauƙin ƙonewa ta hanyar kai tsaye.
2) Ba a buƙatar waya mai waldawa yayin waldawa, kuma ƙarfen tushe yana haɗa kai tsaye.
Saboda haka, ingancin bakin karfe takardar waldi yana da alaƙa da alaƙa da abubuwa kamar masu aiki, kayan aiki, kayan aiki, hanyoyin gini, yanayin waje da gwaji yayin walda.
A cikin aikin walda na bakin karfe zanen gado, walda consumables ba a bukatar, amma bukatun ga wadannan kayan ne in mun gwada da high: daya ne da tsarki na argon gas, da kwarara kudi da kuma lokacin da argon kwarara, da kuma sauran - tungsten. lantarki.
1) Argon
Argon iskar gas ce mara aiki, kuma ba shi da sauƙi a amsa da sauran kayan ƙarfe da iskar gas.Saboda yanayin sanyaya na iska, yankin da ke fama da zafi na walda yana da ƙananan, kuma lalacewar walda yana da ƙananan.Shi ne mafi manufa garkuwa garkuwa ga argon tungsten baka waldi.Tsaftar argon dole ne ya fi 99.99%.An fi amfani da Argon don kare narkakkar tafkin yadda ya kamata, hana iska daga rushewa narkakken tafkin da haifar da iskar shaka a lokacin aikin walda, kuma a lokaci guda yadda ya kamata ya ware yankin walda daga iska, don kare yankin walda da kuma aikin walda yana inganta.
2) Tungsten lantarki
Fuskar lantarki na tungsten ya kamata ya zama santsi, kuma dole ne a kayyade ƙarshen tare da mai da hankali mai kyau.Ta wannan hanyar, ƙarfin wutar lantarki mai ƙarfi yana da kyau, kwanciyar hankali yana da kyau, zurfin walda yana da zurfi, za a iya kiyaye tafkin narkakkar, kabu ɗin walda yana da kyau, kuma ingancin walda yana da kyau.Idan saman na'urar lantarki ta tungsten ta ƙone ko kuma akwai lahani irin su gurɓataccen ruwa, tsagewa, da raguwa a saman, zai yi wuya a fara babban mitar arc yayin waldawa, baka zai zama maras tabbas, baka zai kasance maras tabbas. drift, narkakkar tafkin zai watse, saman zai faɗaɗa, zurfin shigar zai zama marar zurfi, kuma kabu na walda zai lalace.Poor forming, matalauta walda ingancin.
4 Kammalawa
1) Zaman lafiyar argon tungsten arc waldi yana da kyau, kuma daban-daban siffofi na tungsten na lantarki suna da tasiri mai yawa akan ingancin walda na zanen karfe.
2) Tungsten lantarki waldi tare da lebur saman da conical tip iya inganta samuwar kudi na guda-gefe waldi da biyu-gefe waldi, rage zafi-tasiri yankin na waldi, da weld siffar ne mai kyau, da kuma m inji Properties ne mafi alhẽri.
3) Yin amfani da hanyar walda daidai yana iya hana lahanin walda yadda ya kamata.
Lokacin aikawa: Yuli-18-2023