Ungakhetha kanjani igesi yokusika umshini wokusika i-plasma?

Imishini yokusika i-Plasmangokuvamile babe ne-voltage ephezulu engalayishiwe kanye ne-voltage esebenzayo, futhi ukwanda kwamandla kagesi kusho ukwanda kwe-arc enthalpy.Ngenkathi ukwandisa i-enthalpy, ukunciphisa ububanzi be-jet nokwandisa izinga lokugeleza kwegesi kungathuthukisa isivinini sokusika kanye nekhwalithi yokusika.Ama-voltage aphezulu ayadingeka uma usebenzisa amagesi anamandla amakhulu e-ionization, njenge-nitrogen, i-hydrogen noma umoya.Yimaphi amathiphu namaphuzu ahlukene wokukhetha igesi?Ake sibheke ukuhlaziywa okuningiliziwe kwegesi ngabakhiqizi bemishini yokusika i-plasma.

I-Hydrogen ngokuvamile isetshenziswa njengegesi elisizayo elixutshwe namanye amagesi, kanti igesi i-H35 ingenye yamagesi anekhono elinamandla lokusika i-arc ye-plasma.Lapho i-hydrogen ixutshwa ne-argon, ingxenye yevolumu ye-hydrogen ngokuvamile iba ngu-35%.Njengoba i-hydrogen ingakhuphula kakhulu i-arc voltage, i-hydrogen plasma jet ine-enthalpy ephezulu, futhi ikhono lokusika le-plasma jet lithuthukiswa kakhulu.

Umoya-mpilo ungakhuphula ijubane lokusika izinto zensimbi ezithambile.Lapho usika nge-oxygen, imodi yokusika ifana kakhulu neyomshini wokusika amalangabi we-CNC.I-arc ye-plasma yokushisa ephezulu nenamandla amakhulu yenza isivinini sokusika sisheshe, kodwa kufanele sisetshenziswe ngokuhambisana nama-electrode amelana ne-oxidation ephezulu.Nweba impilo yama-electrode.

I-slag eyakhiwe ukusika komoya nokusika kwe-nitrogen iyafana, ngoba okuqukethwe kwevolumu ye-nitrogen emoyeni cishe ku-78%, futhi kukhona cishe u-21% we-oxygen emoyeni, ngakho-ke ijubane lokusika insimbi ephansi ye-carbon emoyeni nayo ikhulu kakhulu. phezulu, futhi Umoya uyigesi eyonga kakhulu, kodwa ukusika ngomoya kukodwa kuzodala izinkinga ezifana nokulengiswa kwe-slag, i-kerf oxidation, nokwanda kwe-nitrogen.Ukuphila okuphansi kwama-electrode nama-nozzles nakho kuzothinta ukusebenza kahle komsebenzi kanye nezindleko zokusika.

Ngaphansi kwesimo samandla kagesi aphezulu, i-nitrogen plasma arc inokuqina okungcono namandla ejethi aphezulu kune-argon.Isibonelo, lapho usika insimbi engagqwali kanye nama-alloys asekelwe ku-nickel, kune-slag encane kakhulu emaphethelweni aphansi, futhi i-nitrogen ingasetshenziswa yodwa.Ingabuye ihlanganiswe namanye amagesi.I-nitrogen noma umoya ivame ukusetshenziswa njengegesi esebenzayo ekusikeni okuzenzakalelayo, futhi lawa magesi amabili abe yigesi ejwayelekile yokusika i-carbon steel ngesivinini esikhulu.

Ukusebenza kwe-argon kuzinzile, futhi akuphenduli nganoma iyiphi insimbi ngisho nasezingeni eliphezulu lokushisa, futhi i-nozzle ne-electrode esetshenzisiwe inokuphila okude kwenkonzo.Kodwa-ke, i-voltage ye-argon plasma arc iphansi, i-enthalpy ayiphezulu, futhi umthamo wokusika ulinganiselwe.Uma kuqhathaniswa nokusika komoya, ubukhulu bokusika buzoncishiswa cishe ngama-25%.Ngaphezu kwalokho, ukushuba kwesimo sensimbi encibilikisiwe kuphakeme kakhulu, okungaba ngu-30% ngaphezulu kwalokho okusendaweni ye-nitrogen, ngakho-ke kuzoba nezinkinga eziningi zokulengiswa kwe-slag.Ngisho nokusika ngegesi exubile yamanye amagesi kuzovame ukunamathela ku-slag.Ngakho-ke, i-argon ehlanzekile ayivamile ukusetshenziswa yodwa ekusikeni kwe-plasma.

AMADODA-INHLANHLA, umkhiqizi ochwepheshe weimishini yokusika laser, inikeza zonke izinhlobo zemishini yokusika i-laser enembile, imishini yokushisela i-laser, nemishini yokuhlanza laser esitokweni isikhathi eside, futhi inikeza izinsizakalo zokuhlola ngesikhathi esifanayo.Uma unezidingo zokucubungula i-laser, sicela ukhululeke ukuxhumana nathi!