Umshini wokusika i-plasma olawulwa ngezinombolo one-voltage ephezulu engalayishiwe kanye ne-voltage yokusebenza idinga i-voltage ephakeme ukuze kuqiniswe i-arc ye-plasma uma usebenzisa igesi enamandla amakhulu e-ionization njenge-nitrogen, i-hydrogen noma umoya.Lapho i-current ihlala njalo, ukwanda kwe-voltage kusho ukwanda kwe-arc enthalpy kanye nokwanda kwekhono lokusika.Uma ububanzi bejethi buncishisiwe futhi izinga lokugeleza kwegesi landa ngenkathi i-enthalpy yanda, isivinini sokusika esisheshayo kanye nekhwalithi engcono yokusika ivame ukutholakala.
1. I-Hydrogen ivamise ukusetshenziswa njengegesi elisizayo ukuze lixutshwe namanye amagesi.Isibonelo, igesi edumile i-H35 (ingxenye yevolumu ye-hydrogen engu-35%, enye i-argon) ingenye yekhono lokusika igesi elinamandla kakhulu, elizuzisa kakhulu i-hydrogen.Njengoba i-hydrogen ingakhuphula kakhulu i-arc voltage, i-hydrogen plasma jet inenani eliphakeme le-enthalpy, futhi lapho isetshenziswa ngokuhambisana ne-argon gas, ikhono lokusika le-plasma jet lithuthukiswa kakhulu.
2. I-oksijeni ingandisa isivinini sokusika izinto eziphansi ze-carbon steel.Uma usika nge-oxygen, imodi yokusika kanye nomshini wokusika amalangabi we-CNC ungacatshangwa kakhulu.Izinga lokushisa eliphezulu kanye namandla aphezulu e-plasma arc kwenza isivinini sokusika sisheshe.Umshini we-spiral duct kufanele uhlanganiswe ne-electrode ukumelana nokushisa okuphezulu kwe-oxidation, futhi i-electrode iyavinjelwa lapho uqala i-arc.Ukuvikelwa komthelela ukwandisa impilo ye-electrode.
3, umoya uqukethe cishe u-78% wevolumu ye-nitrogen, ngakho-ke ukusetshenziswa kwe-air cutting ukwakha i-slag kanye ne-nitrogen kuyinto ecatshangelwayo kakhulu;umoya uqukethe cishe u-21% wevolumu ye-oxygen, ngenxa yokuba khona komoya-mpilo, umoya Ijubane lokusika izinto eziphansi ze-carbon steel liphezulu;ngesikhathi esifanayo, umoya futhi igesi esebenza ukonga kakhulu.Kodwa-ke, lapho ukusika komoya kusetshenziswa yedwa, kunezinkinga ezifana ne-dross kanye ne-oxidation ye-slit, ukwanda kwe-nitrogen, njll., nempilo ephansi ye-electrode kanye ne-nozzle nayo ithinta ukusebenza kahle komsebenzi kanye nezindleko zokusika.Njengoba ukusika kwe-arc ye-plasma ngokuvamile kusebenzisa umthombo wamandla onezici eziqhubekayo zamanje noma eziwumqansa, ukuguqulwa kwamanje kuncane ngemva kokuphakama kwe-nozzle, kodwa ubude be-arc buyanda futhi i-arc voltage iyanda, ngaleyo ndlela ikhulisa amandla e-arc;Ubude be-arc obuvezwe endaweni buyanda, futhi amandla alahlwa yikholomu ye-arc ayanda.
4. I-nitrogen iyigesi esebenzayo evame ukusetshenziswa.Ngaphansi kwesimo samandla kagesi aphezulu, i-nitrogen plasma arc inokuqina okungcono namandla ejethi aphezulu kune-argon, noma ngabe iyinto ene-viscosity ephezulu yokusika insimbi ewuketshezi.Ensimbi engagqwali kanye nama-alloys asekelwe ku-nickel, inani le-slag emaphethelweni aphansi we-slit nalo lincane.I-nitrogen ingasetshenziswa yodwa noma ihlanganiswe namanye amagesi.Imishini yokusika i-plasma ivame ukusetshenziswa.Isibonelo, i-nitrogen noma umoya ivame ukusetshenziswa njengegesi esebenzayo yokusika okuzenzakalelayo.Lawa magesi amabili asephenduke amagesi ajwayelekile okusika i-carbon steel ngesivinini esikhulu.I-nitrogen ngezinye izikhathi isetshenziswa njengegesi e-arcing yokusika i-oxygen plasma arc.
5. Igesi ye-Argon ayiphenduli neze nanoma iyiphi insimbi ekushiseni okuphezulu, futhi umshini wokusika izinombolo we-argon wokulawula i-plasma uzinzile kakhulu.Ngaphezu kwalokho, ama-nozzles nama-electrode asetshenzisiwe anempilo yesevisi ephezulu.Kodwa-ke, i-argon plasma arc ine-voltage ephansi, inani eliphansi le-enthalpy, namandla okusika alinganiselwe.Ubukhulu bokusikwa bucishe bube ngama-25% obuphansi kunobo bokusika komoya.Ngaphezu kwalokho, ukungezwani okungaphezulu kwensimbi encibilikisiwe kukhudlwana endaweni evikelwe nge-argon.Cishe iphakeme ngo-30% kune-nitrogen emkhathini, ngakho-ke kuzoba nezinkinga eziningi ngokumanzisa.Ngisho noma ingxube ye-argon namanye amagesi isetshenziswa, kukhona ukuthambekela kokunamathela ku-slag.Ngakho-ke, igesi ye-argon ehlanzekile ayikaze isetshenziswe yodwa ekusikeni kwe-plasma.
Ukusetshenziswa nokukhethwa kwegesi kumshini wokusika we-plasma we-CNC kubaluleke kakhulu.Ukusetshenziswa kwegesi kuzothinta kakhulu ukunemba kokusika kanye ne-slag.
Isikhathi sokuthumela: Sep-02-2019