Umatshini wokusika i-plasma olawulwa ngamanani kunye nomthamo ophezulu ongekho umthwalo kunye ne-voltage yokusebenza idinga umbane ophezulu wokuzinzisa i-arc ye-plasma xa usebenzisa igesi enegunya eliphezulu le-ionization njenge-nitrogen, i-hydrogen okanye umoya.Xa ikhoyo ngoku, ukunyuka kwe-voltage kuthetha ukunyuka kwe-arc enthalpy kunye nokunyuka kwekhono lokusika.Ukuba ububanzi bejethi buncitshisiwe kwaye izinga lokuhamba kwegesi liyenyuka ngelixa i-enthalpy yanda, isantya sokusika ngokukhawuleza kunye nomgangatho ongcono wokusika ufumaneka rhoqo.
1. I-Hydrogen idla ngokusetyenziswa njengegesi encedisayo ukuxuba kunye nezinye iigesi.Ngokomzekelo, igesi edumileyo ye-H35 (i-hydrogen volume fraction ye-35%, enye i-argon) yenye yezona zixhobo ezinamandla kakhulu zokusika i-arc yegesi, eyona nto inenzuzo kwi-hydrogen.Ekubeni i-hydrogen inokunyusa kakhulu i-arc voltage, i-jet ye-hydrogen plasma inexabiso eliphezulu le-enthalpy, kwaye xa isetyenziswe ngokudibanisa ne-argon gas, ukukwazi ukusika i-jet ye-plasma kuphuculwe kakhulu.
2. I-oksijeni inokunyusa isantya sokusika izinto eziphantsi ze-carbon steel.Xa usika nge-oksijeni, imodi yokusika kunye nomshini wokusika umlilo we-CNC unokucinga kakhulu.Ubushushu obuphezulu kunye namandla aphezulu e-plasma arc yenza isantya sokusika ngokukhawuleza.Umatshini we-spiral duct kufuneka udibaniswe ne-electrode echasene ne-oxidation yokushisa okuphezulu, kwaye i-electrode ithintelwe xa iqala i-arc.Ukukhuselwa kwempembelelo yokwandisa ubomi be-electrode.
I-3, umoya uqulethe malunga ne-78% yomthamo we-nitrogen, ngoko ke ukusetyenziswa kokusika umoya ukwenza i-slag kunye ne-nitrogen icingelwa kakhulu;umoya uqulethe malunga ne-21% yomthamo we-oksijeni, ngenxa yobukho be-oksijini, umoya Isantya sokusika izinto eziphantsi ze-carbon steel nazo ziphezulu;kwangaxeshanye, umoya ukwayeyona gesi isebenzayo inoqoqosho.Nangona kunjalo, xa ukusika komoya kusetyenziswa yedwa, kukho iingxaki ezifana ne-dross kunye ne-oxidation ye-slit, ukwanda kwe-nitrogen, njl.Ekubeni ukusika kwe-arc ye-plasma ngokuqhelekileyo kusebenzisa umthombo wamandla kunye neempawu eziqhubekayo zangoku okanye ezisezantsi, utshintsho lwangoku luncinci emva kokuba ukuphakama kwe-nozzle kunyuswe, kodwa ubude be-arc bunyuswa kwaye i-arc voltage iyanda, ngaloo ndlela ikhulisa amandla e-arc;Ubude be-arc obuvezwe kwindalo buyanda, kwaye amandla alahlekileyo yikholomu ye-arc ayanda.
4. I-nitrogen yigesi esetyenziswa ngokuqhelekileyo.Ngaphantsi kwemeko yamandla ombane aphezulu, i-nitrogen plasma arc inozinzo olungcono kunye namandla e-jet aphezulu kune-argon, nokuba yinto ene-viscosity ephezulu yokusika isinyithi esimanzi.Kwinsimbi engenasici kunye ne-nickel-based alloys, inani le-slag kumda ophantsi we-slit lincinci.I-nitrogen ingasetyenziswa yodwa okanye idityaniswe nezinye iigesi.Oomatshini bokusika i-plasma bahlala besetyenziswa.Ngokomzekelo, i-nitrogen okanye umoya isetyenziswa rhoqo njengegesi esebenzayo yokusika ngokuzenzekelayo.Ezi gesi zimbini ziye zaba ziigesi eziqhelekileyo zokusika i-high-speed cut of carbon steel.Ngamanye amaxesha i-nitrojeni isetyenziswa njengegesi ye-arcing ye-oxygen plasma arc cutting.
5. I-Argon igesi ayifuni ukusabela nayiphi na isinyithi kwiqondo lokushisa eliphezulu, kwaye i-argon yokulawula amanani omatshini wokusika i-plasma uzinzile kakhulu.Ngaphezu koko, ii-nozzles kunye ne-electrode ezisetyenzisiweyo zinobomi benkonzo ephezulu.Nangona kunjalo, i-argon plasma arc ine-voltage ephantsi, ixabiso eliphantsi le-enthalpy, kunye nomthamo olinganiselweyo wokusika.Ubunzima bokusikwa bu malunga ne-25% ephantsi kunelo lokusika umoya.Ukongeza, ukunyanzeliswa komphezulu wentsimbi etyhidiweyo inkulu kwindawo ekhuselweyo ye-argon.Imalunga ne-30% ephezulu kunomoya wenitrogen, ngoko ke kuya kubakho iingxaki ezininzi ngokurhaxa.Nangona umxube we-argon kunye nezinye iigesi zisetyenzisiweyo, kukho ukuthambekela kokunamathela kwi-slag.Ke ngoko, igesi ye-argon ecocekileyo ayifane isetyenziswe yodwa ukusika iplasma.
Ukusetyenziswa kunye nokukhethwa kwegesi kwi-CNC umatshini wokusika i-plasma kubaluleke kakhulu.Ukusetyenziswa kwegesi kuya kuchaphazela kakhulu ukuchaneka kokusika kunye ne-slag.
Ixesha lokuposa: Sep-02-2019