Yellow of Weld Spots in Nut Projection Welding and Remedial Measures?

Powotcherera mtedza, si zachilendo kuti mawanga a weld awonekere achikasu akatha kuwotcherera. Nkhaniyi ikufotokoza zomwe zimayambitsa zochitika zachikasu ndipo zimapereka njira zothetsera vutoli, kuonetsetsa kuti ma welds apamwamba apangidwe.

Zifukwa za Yellow:

1. Oxidation: Mtundu wachikasu ukhoza kuchitika chifukwa cha makutidwe ndi okosijeni wa malo owotcherera panthawi yowotcherera. Zinthu monga kusatetezedwa kokwanira kwa gasi kapena kuyeretsa kosayenera kwa malo ogwirira ntchito kumatha kupangitsa kuti pakhale mpweya wambiri, zomwe zimapangitsa kuti makutidwe ndi okosijeni.
2. Kuipitsidwa: Kukhalapo kwa zonyansa, monga mafuta, mafuta, kapena zokutira pamwamba pa chogwirira ntchito kapena mtedza, kungapangitse kuti madontho a weld akhale achikasu. Zowonongekazi zimatha kuwonongeka chifukwa cha kutentha panthawi yowotcherera, zomwe zimapangitsa kuti khungu lisinthe.
3. Kutentha Kwambiri: Kutentha kwambiri kapena nthawi yayitali yowotcherera kungayambitsenso mawanga a weld. Kutentha kwambiri kungayambitse mapangidwe a intermetallic mankhwala kapena kusintha kwa microstructure, zomwe zimabweretsa maonekedwe achikasu.

Mayankho Othana ndi Yellowing:

1. Kuyeretsa Moyenera: Tsukani bwino chogwirira ntchito ndi mtedza musanawotcherera kuti muchotse zowononga zilizonse. Gwiritsani ntchito njira zoyenera zoyeretsera, monga kuchotsera mafuta kapena kuyeretsa zosungunulira, kuti pakhale malo oyera komanso opanda zowononga.
2. Gasi Woteteza Wokwanira: Onetsetsani kuti mpweya wokwanira wotetezedwa panthawi yowotcherera kuti muchepetse kukhudzana ndi mpweya wa mumlengalenga. Izi zitha kutheka posintha kuchuluka kwa gasi, kukhathamiritsa malo amphuno, kapena kugwiritsa ntchito makapu amafuta kapena zotchingira kuti muteteze chitetezo cha gasi.
3. Konzani Zowotcherera Zowotcherera: Sinthani magawo azowotcherera, monga apano, magetsi, ndi nthawi yowotcherera, kuti mukwaniritse bwino kwambiri pakati pa kuyika kwa kutentha ndi mtundu wa weld. Pewani kutentha kwambiri komwe kungayambitse kusinthika mwa kukhathamiritsa magawo potengera mtundu wa zinthu ndi makulidwe.
4. Unikani Kugwirizana kwa Zinthu: Tsimikizirani kugwirizana pakati pa zida zogwirira ntchito, zinthu za mtedza, ndi zokutira zilizonse zapamtunda. Zida zosagwirizana kapena zokutira zimatha kukumana ndi zosayenera panthawi yowotcherera, zomwe zimapangitsa kuti pakhale kusintha. Sankhani zipangizo zomwe zimagwirizana kapena ganizirani kuchotsa zokutira zosagwirizana musanawotchere.
5. Post-Weld Cleaning: Mukamaliza kuwotcherera, yeretsani pambuyo pa kuwotcherera kuti muchotse zotsalira zilizonse kapena sipatter zomwe zingapangitse kuti zisinthe. Gwiritsani ntchito njira zoyeretsera zoyenera malinga ndi zofunikira za pulogalamuyo.

Kutentha kwa mawanga a weld mu kuwotcherera kwa nati kumatha chifukwa cha okosijeni, kuipitsidwa, kapena kutentha kwambiri. Pogwiritsa ntchito njira zoyenera zoyeretsera, kuwonetsetsa kutetezedwa kwa mpweya wokwanira, kukhathamiritsa zowotcherera, kuwunika momwe zinthu zikuyendera, komanso kuyeretsa pambuyo pa weld, opanga amatha kuthana ndi vuto la chikasu ndikukwaniritsa ma weld apamwamba kwambiri. Kuwunika nthawi zonse kwa njira yowotcherera ndikutsata njira zabwino kwambiri kumathandizira kuwonetsetsa kuti mawonekedwe a weld amafanana komanso mtundu wonse wazinthu.