Kodi munganene kusiyana pakati pa kuwotcherera kwa TIG ndi MIG?

TIG

1.Kugwiritsa ntchito :

   kuwotcherera TIG(tungsten argon arc welding) ndi njira yowotcherera yomwe Ar yoyera imagwiritsidwa ntchito ngati mpweya wotchingira ndipo ma elekitirodi a tungsten amagwiritsidwa ntchito ngati ma elekitirodi.Waya wowotcherera wa TIG amaperekedwa m'mizere yowongoka yautali wina (nthawi zambiri lm).Kuwotcherera kwa gasi wotetezedwa ndi tungsten koyera kapena activated tungsten (thoriated tungsten, cerium tungsten, zirconium tungsten, lanthanum tungsten) ngati ma elekitirodi osasungunuka, pogwiritsa ntchito arc pakati pa tungsten electrode ndi chogwirira ntchito kusungunula chitsulo kupanga chowotcherera.Elekitirodi ya tungsten simasungunuka panthawi yowotcherera ndipo imagwira ntchito ngati electrode.Nthawi yomweyo, argon kapena helium amadyetsedwa mu nozzle ya nyali kuti atetezedwe.Zitsulo zowonjezera zingathe kuwonjezeredwa monga momwe mukufunira.Mayiko odziwika ngatikuwotcherera TIG.

2. Ubwino:

Ubwino waukulu wa njira yowotcherera ya TIG ndikuti imatha kuwotcherera zinthu zosiyanasiyana.Kuphatikizapo workpieces ndi makulidwe a 0.6mm ndi pamwamba, zipangizo monga aloyi zitsulo, zotayidwa, magnesium, mkuwa ndi kasakaniza wake, imvi kuponyedwa chitsulo, bronzes osiyanasiyana, faifi tambala, siliva, Titaniyamu ndi lead.Gawo lalikulu la ntchito ndi kuwotcherera kwa zida zowonda komanso zapakatikati ngati zodutsa muzu pazigawo zokulirapo.

3. Kusamala: 

A. Kutetezedwa kwa mpweya wofunikira: pamene kuwotcherera panopa kuli pakati pa 100-200A, ndi 7-12L / min;pamene kuwotcherera panopa ali pakati pa 200-300A, ndi 12-15L/mphindi.

B. Utali wotuluka wa tungsten elekitirodi uyenera kukhala waufupi momwe ungathere wachibale ndi nozzle, ndipo kutalika kwa arc kuyenera kuyendetsedwa pa 1-4mm (2-4mm kwa chitsulo chowotcherera kaboni, 1-3mm pakuwotcherera chitsulo chochepa cha aloyi. ndi zitsulo zosapanga dzimbiri).

C. Pamene liwiro la mphepo ndi lalikulu kuposa 1.0m/s, miyeso yoletsa mphepo iyenera kutengedwa;samalani ndi mpweya wabwino kuti musavulaze wogwiritsa ntchito.

D. Chotsani zonyansa zamafuta, dzimbiri ndi chinyezi pamalo owotcherera.

E. Ndikoyenera kugwiritsa ntchito magetsi a DC okhala ndi mawonekedwe otsetsereka akunja, ndipo mtengo wa tungsten ndi wabwino kwambiri.

F. Mukawotchera chitsulo chochepa cha alloy pamwamba pa 1.25% Cr, mbali yakumbuyo iyeneranso kutetezedwa.

MIG

1. Ntchito:

   kuwotcherera MIGndi kusungunula pole inert mpweya wotetezedwa kuwotcherera.Amagwiritsa ntchito Ar ndi mpweya wina wa inert monga mpweya wotetezera waukulu, kuphatikizapo mpweya wa Ar kapena Ar wosakanikirana ndi mpweya wochepa wamagetsi (monga O2 pansi pa 2% kapena CO2 pansi pa 5%) kuti asungunuke.Njira yowotcherera ya arc kuwotcherera.Waya wa MIG umaperekedwa muzozungulira kapena zozungulira mu zigawo.Njira yowotcherera iyi imagwiritsa ntchito arc yoyaka pakati pa waya wowotcherera mosalekeza ndi chogwirira ntchito ngati gwero la kutentha, ndipo mpweya wotuluka pamphuno yamoto umagwiritsidwa ntchito kuteteza arc kwa kuwotcherera.

2. Ubwino:

Ndi yabwino kuwotcherera m'malo osiyanasiyana, komanso ali ndi liwiro kuwotcherera mofulumira ndi mlingo wapamwamba mafunsidwe.Kuwotcherera kwa arc kotetezedwa ndi MIG kumagwiritsidwa ntchito pakuwotcherera zitsulo zazikulu kwambiri, kuphatikiza chitsulo cha carbon ndi alloy steel.Kuwotcherera kwa MIG ndi koyenera chitsulo chosapanga dzimbiri, aluminiyamu, magnesiamu, mkuwa, titaniyamu, mapiki ndi ma aloyi a faifi tambala.Kuwotcherera mawanga a Arc kumathanso kuchitidwa pogwiritsa ntchito njira yowotcherera iyi.

3.Kusamala:

A. Kuthamanga kwa mpweya woteteza ndi 20-25L / min.

B. Kutalika kwa arc nthawi zambiri kumayendetsedwa pafupifupi 4-6mm.

C. Mphamvu ya mphepo ndiyovuta kwambiri kuwotcherera.Mphepo ikathamanga kwambiri kuposa 0.5m/s, miyeso yoletsa mphepo iyenera kutengedwa;samalani ndi mpweya wabwino kuti musavulaze wogwiritsa ntchito.

D.Kugwiritsa ntchito pulsed arc current kutha kupeza stable spray arc, makamaka yoyenera kuwotcherera chitsulo chosapanga dzimbiri, mbale yopyapyala, kuwotcherera ofukula ndi kuwotcherera pamwamba.

E. Chonde gwiritsani ntchito kuphatikiza gasi wa Ar+2% O2 kuwotcherera chitsulo chosapanga dzimbiri chotsika kwambiri, osagwiritsa ntchito Ar ndi CO2 kuphatikiza zitsulo zowotcherera.

F. Chotsani zonyansa zamafuta, dzimbiri ndi chinyezi pamalo owotcherera.