Bohler voestalpine URANOS 1500, Instruction Manual

Page: 26 / 340

22
CENNI TEORICI SULLA SALDATURA
IT
»
6ROLGLILFD]LRQHGHOEDJQRGLVDOGDWXUDWURSSR
UDSLGD
»
5LGXUUHODYHORFLW¢GLDYDQ]DPHQWRLQVDOGDWXUD
»
(VHJXLUHXQSUHULVFDOGRGHLSH]]LGDVDOGDUH
»
$XPHQWDUHODFRUUHQWHGLVDOGDWXUD
Cricche a caldo
Causa Soluzione
»
3DUDPHWULGLVDOGDWXUDQRQFRUUHȐL
»
5LGXUUHODFRUUHQWHGLVDOGDWXUD
»
8WLOL]]DUHXQHOHȐURGRGLGLDPHWURLQIHULRUH
»
3UHVHQ]DGLJUDVVRYHUQLFHUXJJLQHRVSRUFL]LDVXL
SH]]LGDVDOGDUH
»
(VHJXLUHXQDDFFXUDWDSXOL]LDGHLSH]]LSULPDGLHVHJXLUHOD
VDOGDWXUD
»
3UHVHQ]DGLJUDVVRYHUQLFHUXJJLQHRVSRUFL]LDVXO
PDWHULDOHGDSSRUWR
»
8WLOL]]DUHVHPSUHSURGRȐLHPDWHULDOLGLTXDOLW¢
»
0DQWHQHUHVHPSUHLQSHUIHȐHFRQGL]LRQLLOPDWHULDOHGDSSRUWR
»
0RGDOLW¢GLHVHFX]LRQHGHOODVDOGDWXUDQRQ
FRUUHȐD
»
(VHJXLUHOHFRUUHȐHVHTXHQ]HRSHUDWLYHSHULOWLSRGLJLXQWRGD
VDOGDUH
»
3H]]LGDVDOGDUHFRQFDUDȐHULVWLFKHGLVVLPLOL
»
(VHJXLUHXQDLPEXUUDWXUDSULPDGLUHDOL]]DUHODVDOGDWXUD
Cricche a freddo
Causa Soluzione
»
3UHVHQ]DGLXPLGLW¢QHOPDWHULDOHGDSSRUWR
»
8WLOL]]DUHVHPSUHSURGRȐLHPDWHULDOLGLTXDOLW¢
»
0DQWHQHUHVHPSUHLQSHUIHȐHFRQGL]LRQLLOPDWHULDOHGDSSRUWR
»
*HRPHWULDSDUWLFRODUHGHOJLXQWRGDVDOGDUH
»
(VHJXLUHXQSUHULVFDOGRGHLSH]]LGDVDOGDUH
»
(VHJXLUHXQSRVWULVFDOGR
»
(VHJXLUHOHFRUUHȐHVHTXHQ]HRSHUDWLYHSHULOWLSRGLJLXQWRGD
VDOGDUH
9. CENNI TEORICI SULLA SALDATURA
9.1 Saldatura con elettrodo rivestito (MMA)
Preparazione dei lembi
3HURȐHQHUHEXRQHVDOGDWXUHªVHPSUHFRQVLJOLDELOHRSHUDUHVXSDUWLSXOLWHOLEHUHGDRVVLGRUXJJLQHRDOWULDJHQWLFRQWDPLQDQWL
6FHOWDGHOOHOHȐURGR
,OGLDPHWURGHOOHOHȐURGRGDLPSLHJDUHGLSHQGHGDOORVSHVVRUHGHOPDWHULDOHGDOODSRVL]LRQHGDOWLSRGLJLXQWRHGDOWLSRGL
FLDQIULQR
(OHȐURGLGLJURVVRGLDPHWURULFKLHGRQRFRUUHQWLHOHYDWHFRQFRQVHJXHQWHHOHYDWRDSSRUWRWHUPLFRQHOODVDOGDWXUD
Tipo di rivestimento Proprietà Impiego
5XWLOR )DFLOLW¢GLPSLHJR 7XȐHOHSRVL]LRQL
Acido $OWDYHORFLW¢IXVLRQH 3LDQR
Basico &DUDȐPHFFDQLFKH 7XȐHOHSRVL]LRQL
Scelta della corrente di saldatura
,OUDQJHGHOODFRUUHQWHGLVDOGDWXUDUHODWLYDDOWLSRGLHOHȐURGRLPSLHJDWRYLHQHVSHFLILFDWRGDOFRVWUXȐRUHVXOFRQWHQLWRUHVWHVVR
GHJOLHOHȐURGL
Accensione e mantenimento dell'arco
/DUFRHOHȐULFRVLVWDELOLVFHVIUHJDQGRODSXQWDGHOOHOHȐURGRVXOSH]]RGDVDOGDUHFROOHJDWRDOFDYRPDVVDHXQDYROWDVFRFFDWR
ODUFRULWUDHQGRUDSLGDPHQWHODEDFFKHȐDILQRDOODGLVWDQ]DGLQRUPDOHVDOGDWXUD
3HU PLJOLRUDUH ODFFHQVLRQH GHOODUFR ª XWLOH LQ JHQHUDOH XQLQFUHPHQWR LQL]LDOH GL FRUUHQWH ULVSHȐR DOOD FRUUHQWH EDVH GL
VDRW6WDUW
8QDYROWDLQVWDXUDWRVLODUFRHOHȐULFRLQL]LDODIXVLRQHGHOODSDUWHFHQWUDOHGHOOHOHȐURGRFKHVLGHSRVLWDVRȐRIRUPDGLJRFFHVXO
SH]]RGDVDOGDUH
,OULYHVWLPHQWRHVWHUQRGHOOHOHȐURGRIRUQLVFHFRQVXPDQGRVLLOJDVSURWHȐLYRSHUODVDOGDWXUDFKHULVXOWDFRV®GLEXRQDTXDOLW¢
3HUHYLWDUHFKHOHJRFFHGLPDWHULDOHIXVRFRUWRFLUFXLWDQGROHOHȐURGRFROEDJQRGLVDOGDWXUDDFDXVDGLXQDFFLGHQWDOH
DYYLFLQDPHQWR WUD L GXH SURYRFKLQR OR VSHJQLPHQWR GHOODUFR ª PROWR XWLOH XQ PRPHQWDQHR DXPHQWR GHOOD FRUUHQWH GL
VDOGDWXUDILQRDOWHUPLQHGHOFRUWRFLUFXLWR$UF)RUFH
1HOFDVRLQFXLOHOHȐURGRULPDQJDLQFROODWRDOSH]]RGDVDOGDUHªXWLOHULGXUUHDOPLQLPRODFRUUHQWHGLFRUWRFLUFXLWRDQWL
VWLFNLQJ