Ukushisela kwepayipi lensimbi lomthungo oqondile (lsaw/erw):

Ngenxa yomthelela we-welding current kanye nethonya lamandla adonsela phansi, i-weld yangaphakathi yepayipi izophuma, futhi i-weld yangaphandle izophinde igwebe. Uma lezi zinkinga zisetshenziswa endaweni evamile yoketshezi olunomfutho ophansi, ngeke zithinteke.

Uma isetshenziswa ekushiseni okuphezulu, ukucindezela okuphezulu kanye nemvelo yoketshezi olusheshayo, izodala izinkinga ekusetshenzisweni. Lesi sici kufanele siqedwe kusetshenziswa imishini yokulinganisa i-weld.

Isimiso sokusebenza semishini yokulinganisa i-welding seam yilezi: i-mandrel enobubanzi obungu-0.20mm encane kunobubanzi obungaphakathi bepayipi isethwe kupayipi elishiselwe, futhi i-mandrel ixhunywe kusilinda ngentambo yocingo. Ngokusebenzisa isenzo se-cylinder yomoya, i-mandrel ingahanjiswa ngaphakathi kwendawo ehleliwe. Ngaphakathi kobude be-mandrel, iqoqo lemiqulu engenhla nephansi isetshenziselwa ukugoqa i-weld ngendlela yokunyakaza okuphindaphindiwe okuhambisana nesikhundla se-weld. Ngaphansi kokucindezelwa kwe-mandrel kanye ne-roll, ama-protrusions kanye nokucindezeleka kuyaqedwa, futhi i-contour ye-weld kanye ne-pipe contour iguqulwa kahle. Ngesikhathi esifanayo nokwelashwa kwe-welding leveling, isakhiwo sokusanhlamvu esiqinile ngaphakathi kwe-weld sizocindezelwa, futhi sizodlala indima ekuthuthukiseni ukuminyana kwesakhiwo se-weld kanye nokwenza ngcono amandla.

Isingeniso sezinga le-weld:

Ngesikhathi senqubo yokugoqa yomugqa wensimbi, ukuqina komsebenzi kuzokwenzeka, okungahambisani nokucubungula kwepayipi, ikakhulukazi ukugoba kwepayipi.
Phakathi nenqubo yokushisela, kuzokwenziwa isakhiwo sokusanhlamvu esimahhadlahhadla lapho sishisela, futhi kuzoba nengcindezi yokushisela lapho kushiswa khona, ikakhulukazi ekuxhumekeni phakathi kwe-weld nesisekelo sensimbi. . Imishini yokwelapha ukushisa iyadingeka ukuze kuqedwe ukuqina komsebenzi kanye nokucwenga isakhiwo sokusanhlamvu.
Njengamanje, inqubo yokwelapha ukushisa evame ukusetshenziswa iwukwelashwa kwesixazululo esikhanyayo endaweni evikela i-hydrogen, futhi ipayipi lensimbi engagqwali lishiselwa ngaphezu kuka-1050 °.
Ngemva kwesikhathi sokulondoloza ukushisa, isakhiwo sangaphakathi siyashintsha ukuze sakhe isakhiwo se-austenite esifanayo, esingafaki oxidi ngaphansi kokuvikelwa komkhathi we-hydrogen.
Imishini esetshenziswayo iyithuluzi elikhanyayo eliku-inthanethi (i-annealing) imishini. Izinto zokusebenza zixhunywe neyunithi yokwakha i-roll-goba, futhi ipayipi elishiselwe lingaphansi kokwelashwa kwesisombululo esikhanyayo ku-inthanethi ngesikhathi esifanayo. Imishini yokushisisa isebenzisa imvamisa emaphakathi noma ukunikezwa kwamandla okuvama okuphezulu ukuze kushise ngokushesha.
Yethula umoya we-hydrogen omsulwa noma i-hydrogen-nitrogen ukuze uvikeleke. Ukuqina kwepayipi elifakwe emanzini kulawulwa ku-180±20HV, okungahlangabezana nezidingo zokucubungula nokusetshenziswa ngemuva.