Laser waldi ne yafi nufin inganta waldi yadda ya dace da kuma ingancin bakin ciki bango kayan da daidaici sassa.A yau ba za mu yi magana game da fa'idar waldawar Laser ba amma mun mai da hankali kan yadda ake amfani da iskar kariya don waldawar laser yadda ya kamata.
Me yasa amfani da garkuwar gas don waldawar laser?
A cikin waldawar laser, gas ɗin garkuwa zai shafi ƙirar walda, ingancin walda, zurfin walda, da faɗin walda.A mafi yawan lokuta, busa iskar gas ɗin da aka taimaka zai yi tasiri mai kyau akan walda, amma kuma yana iya haifar da illa.
Lokacin da kuka hura garkuwar gas daidai, zai taimaka muku:
✦Yadda ya kamata kare walda pool don rage ko ma kauce wa hadawan abu da iskar shaka
✦Yadda ya kamata rage fantsama da aka samar a cikin aikin walda
✦Yadda ya kamata rage weld pores
✦Taimaka wa tafkin walda a shimfida a ko'ina lokacin daɗaɗɗa, ta yadda kabuwar walda ta zo tare da tsaftataccen gefe mai santsi.
✦Tasirin kariya na ƙarfe tururi plume ko plasma girgije a kan Laser an rage yadda ya kamata, da kuma ingancin amfani da Laser yana karuwa.
Idan dai har danau'in garkuwar gas, yawan kwararar gas, da zaɓin yanayin busadaidai ne, za ku iya samun kyakkyawan sakamako na waldi.Koyaya, rashin yin amfani da iskar kariya ba daidai ba na iya yin illa ga walda.Yin amfani da nau'in garkuwa mara kyau na iya haifar da ɓarna a cikin walda ko rage kayan aikin walda.Maɗaukaki ko ƙananan ƙarancin iskar iskar gas na iya haifar da mafi munin walƙiya da iskar shaka da tsangwama daga waje na kayan ƙarfe a cikin tafkin walda, yana haifar da rugujewar walda ko yin rashin daidaituwa.
Nau'in garkuwar gas
Abubuwan da aka saba amfani da su na kariya na waldawar Laser sune N2, Ar, da He.Halin su na zahiri da na sinadarai sun bambanta, don haka tasirinsu akan walda shima ya bambanta.
Nitrogen (N2)
Ƙarfin ionization na N2 yana da matsakaici, sama da na Ar, kuma ƙasa da na Shi.Karkashin radiation na Laser, digiri na ionization na N2 yana tsayawa a kan madaidaicin keel, wanda zai iya rage samuwar girgijen plasma da kuma ƙara yawan amfani da Laser.Nitrogen zai iya amsawa tare da aluminum gami da carbon karfe a wani zafin jiki don samar da nitrides, wanda zai inganta weld brittleness da kuma rage taurin, da kuma samun babban m tasiri a kan inji Properties na weld gidajen abinci.Saboda haka, ba a ba da shawarar yin amfani da nitrogen lokacin walda aluminum gami da carbon karfe.
Koyaya, sinadarai tsakanin nitrogen da bakin karfe da nitrogen ke samarwa zai iya inganta ƙarfin haɗin gwiwar walda, wanda zai kasance da fa'ida don inganta kayan aikin walda, don haka walda bakin karfe na iya amfani da nitrogen azaman iskar kariya.
Argon (Ar)
Ƙarfin ionization na Argon yana da ƙananan ƙananan, kuma digirinsa na ionization zai zama mafi girma a ƙarƙashin aikin laser.Sa'an nan, Argon, a matsayin garkuwar gas, ba zai iya yadda ya kamata sarrafa samuwar plasma girgije, wanda zai rage tasiri amfani kudi na Laser waldi.Tambayar ta taso: shin argon wani ɗan takara mara kyau ne don amfani da walda a matsayin iskar kariya?Amsar ita ce A'a. Kasancewar iskar gas, Argon yana da wuyar amsawa tare da yawancin karafa, kuma Ar yana da arha don amfani.Bugu da ƙari, yawan Ar yana da girma, zai zama mai dacewa don nutsewa zuwa saman tafkin narkar da weld kuma zai iya kare tafkin walda, don haka za'a iya amfani da Argon azaman iskar kariya ta al'ada.
Helium (Shi)
Ba kamar Argon ba, Helium yana da ingantacciyar ƙarfin ionization wanda zai iya sarrafa samuwar girgijen plasma cikin sauƙi.A lokaci guda, helium ba ya amsa da kowane ƙarfe.Yana da gaske mai kyau zabi ga Laser waldi.Matsalar ita ce Helium yana da ɗan tsada.Don masu ƙirƙira waɗanda ke samar da samfuran ƙarfe na ƙarfe mai yawa, helium zai ƙara adadin kuɗi mai yawa ga farashin samarwa.Don haka ana amfani da helium gabaɗaya a cikin binciken kimiyya ko samfuran da ke da ƙarin ƙima.
Yadda za a busa iskar garkuwa?
Da farko dai, ya kamata a bayyana a fili cewa abin da ake kira "oxidation" na weld suna ne kawai na kowa, wanda a ka'idar yana nufin halayen sinadaran da ke tsakanin walda da abubuwan da ke cutar da iska, wanda ke haifar da lalacewar walda. .Yawanci, ƙarfen walda yana amsawa da oxygen, nitrogen, da hydrogen a cikin iska a wani yanayin zafi.
Don hana walda daga kasancewa "oxidized" yana buƙatar ragewa ko guje wa hulɗa tsakanin irin waɗannan abubuwa masu cutarwa da ƙarfe na walda a ƙarƙashin babban zafin jiki, wanda ba kawai a cikin narkakkar tafki ba amma duk tsawon lokacin daga lokacin da ƙarfe na walda ya narke har sai an narke. Karfin tafkin narkakkar yana da ƙarfi kuma zafinsa yana yin sanyi zuwa wani yanayin zafi.
Manyan hanyoyi guda biyu na busa iskar garkuwa
▶Ɗayan yana hura iskar garkuwa a gaɓar gefe, kamar yadda aka nuna a hoto na 1.
▶Wata hanyar busa coaxial, kamar yadda aka nuna a hoto 2.
Hoto 1.
Hoto 2.
Zaɓin takamaiman hanyoyin busa guda biyu shine cikakken la'akari da bangarori da yawa.Gabaɗaya, ana ba da shawarar yin amfani da hanyar iskar gas mai kariya ta gefe.
Wasu misalan walda na Laser
1. Madaidaicin dutsen dutse/layin walda
Kamar yadda aka nuna a Hoto na 3, sifar weld ɗin samfurin na layi ne, kuma sigar haɗin gwiwa na iya zama haɗin gindi, haɗin gwiwa, haɗin gwiwa mara kyau, ko haɗin haɗaɗɗen walda.Don irin wannan samfurin, yana da kyau a yi amfani da iskar gas mai karewa ta gefe-axis kamar yadda aka nuna a hoto 1.
2. Rufe adadi ko waldi na yanki
Kamar yadda aka nuna a cikin Hoto na 4, siffar weld na samfurin rufaffiyar tsari ne kamar kewayar jirgin sama, siffa mai yawa na jirgin sama, sifar layin layi mai nau'i-nau'i da yawa, da sauransu. Tsarin haɗin gwiwa na iya zama haɗin gwiwa na gindi, haɗin gwiwa na cinya, haɗaɗɗen walda, da sauransu. Zai fi kyau a ɗauki hanyar iskar gas mai kariya ta coaxial kamar yadda aka nuna a cikin Hoto 2 don irin wannan samfurin.
Zaɓin iskar gas mai karewa yana shafar ingancin walda, inganci, da farashin samarwa, amma saboda bambancin kayan walda, a cikin ainihin aikin walda, zaɓin gas ɗin walda ya fi rikitarwa kuma yana buƙatar cikakken la'akari da kayan walda, walda. hanya, waldi matsayi, kazalika da bukatun da waldi sakamako.Ta hanyar gwaje-gwajen walda, zaku iya zaɓar gas ɗin walda mafi dacewa don cimma kyakkyawan sakamako.
Masu sha'awar waldawar Laser kuma suna son koyon yadda ake zabar gas ɗin garkuwa
Hanyoyin haɗi:
Lokacin aikawa: Oktoba-10-2022