Makina odulira a plasma oyendetsedwa ndi manambala okhala ndi voliyumu yayikulu yopanda katundu komanso voteji yogwiritsira ntchito imafunikira mphamvu yayikulu kuti ikhazikitse arc ya plasma mukamagwiritsa ntchito mpweya wokhala ndi mphamvu yayikulu ya ionization monga nayitrogeni, haidrojeni kapena mpweya.Pamene panopa ndi mosalekeza, kuwonjezeka voteji kumatanthauza kuwonjezeka kwa arc enthalpy ndi kuwonjezeka kwa kudula luso.Ngati m'mimba mwake ya jet imachepetsedwa ndipo kuchuluka kwa mpweya wa gasi kumawonjezeka pamene enthalpy ikuwonjezeka, kuthamanga kwachangu komanso khalidwe lodula bwino nthawi zambiri limapezeka.
1. Hydrogen imagwiritsidwa ntchito ngati gasi wothandizira kusakaniza ndi mpweya wina.Mwachitsanzo, mpweya wotchuka H35 (hydrogen voliyumu gawo la 35%, ena onse ndi argon) ndi imodzi mwa mphamvu kwambiri mpweya arc kudula luso, amene makamaka opindulitsa kwa haidrojeni.Popeza kuti haidrojeni ikhoza kuonjezera mphamvu ya arc, ndege ya hydrogen plasma imakhala ndi mtengo wapatali wa enthalpy, ndipo ikagwiritsidwa ntchito pamodzi ndi mpweya wa argon, luso lodula la plasma jet limakhala bwino kwambiri.
2. Mpweya wa okosijeni ukhoza kuonjezera liwiro la kudula zipangizo zazitsulo za carbon.Mukadula ndi okosijeni, njira yodulira ndi makina odulira moto wa CNC ndizovuta kwambiri.Kutentha kwakukulu ndi mphamvu ya plasma arc imapangitsa kuti kudulako kufulumire.Makina opangira ma spiral duct ayenera kuphatikizidwa ndi ma elekitirodi osamva kutentha kwa okosijeni, ndipo ma elekitirodi amatetezedwa poyambitsa arc.Chitetezo champhamvu chowonjezera moyo wa electrode.
3, mpweya uli pafupifupi 78% ya voliyumu ya nayitrogeni, kotero kugwiritsa ntchito kudula mpweya kupanga slag ndi nayitrogeni ndizongoganizira;mpweya umakhalanso ndi pafupifupi 21% ya mpweya wa okosijeni, chifukwa cha kukhalapo kwa mpweya, mpweya Kuthamanga kwa kudula zipangizo zazitsulo za carbon ndipamwamba;nthawi yomweyo, mpweya ndi mpweya ntchito kwambiri ndalama.Komabe, pamene kudula kwa mpweya kumagwiritsidwa ntchito kokha, pamakhala mavuto monga phala ndi okosijeni wa ng'anjo, kuwonjezeka kwa nayitrogeni, ndi zina zotero, ndipo moyo wapansi wa electrode ndi nozzle umakhudzanso ntchito yabwino komanso kuchepetsa mtengo.Popeza kudula kwa plasma arc nthawi zambiri kumagwiritsa ntchito gwero lamagetsi lomwe limakhala ndi mawonekedwe apano kapena otsetsereka, kusintha kwapano kumakhala kochepa pakatha kutalika kwa nozzle, koma kutalika kwa arc kumawonjezeka ndipo mphamvu ya arc ikuwonjezeka, potero kumawonjezera mphamvu ya arc;Kutalika kwa arc komwe kumawonekera ku chilengedwe kumawonjezeka, ndipo mphamvu yotayika ndi arc column imawonjezeka.
4. Nayitrojeni ndi mpweya wogwiritsidwa ntchito kwambiri.Pansi pa mphamvu yamagetsi yamagetsi apamwamba, nitrogen plasma arc imakhala yokhazikika komanso mphamvu ya jet yapamwamba kuposa argon, ngakhale ndi chinthu chokhala ndi mamasukidwe apamwamba odula zitsulo zamadzimadzi.Muzitsulo zosapanga dzimbiri ndi ma alloys opangidwa ndi nickel, kuchuluka kwa slag pamunsi pamphepete mwa mphukira kumakhala kochepa.Nayitrogeni amatha kugwiritsidwa ntchito payekha kapena kuphatikiza ndi mpweya wina.Makina odulira plasma amagwiritsidwa ntchito nthawi zambiri.Mwachitsanzo, nayitrogeni kapena mpweya nthawi zambiri amagwiritsidwa ntchito ngati gasi wogwira ntchito podula makina.Mipweya iwiriyi yasanduka mipweya yokhazikika yodula kwambiri chitsulo cha carbon.Nayitrogeni nthawi zina amagwiritsidwa ntchito ngati mpweya wopangira mpweya wa plasma arc.
5. Mpweya wa Argon sungagwirizane ndi chitsulo chilichonse pa kutentha kwakukulu, ndipo makina odulira manambala a argon a plasma ndi okhazikika kwambiri.Kuphatikiza apo, ma nozzles ndi ma electrode omwe amagwiritsidwa ntchito amakhala ndi moyo wautali.Komabe, argon plasma arc ili ndi magetsi otsika, mtengo wotsika wa enthalpy, ndi mphamvu yochepa yodula.Makulidwe a odulidwawo ndi pafupifupi 25% m'munsi kuposa a kudula mpweya.Kuonjezera apo, kugwedezeka kwapamtunda kwachitsulo chosungunuka kumakhala kwakukulu mu malo otetezedwa ndi argon.Ndi pafupifupi 30% yokwera kuposa yomwe ili mumlengalenga wa nayitrogeni, kotero padzakhala zovuta zambiri pakuwotcha.Ngakhale kusakaniza kwa argon ndi mpweya wina kumagwiritsidwa ntchito, pali chizolowezi chomamatira ku slag.Chifukwa chake, mpweya wabwino wa argon sunagwiritsidwe ntchito panokha podula plasma.
Kugwiritsa ntchito ndi kusankha gasi mu CNC plasma kudula makina ndikofunikira kwambiri.Kugwiritsiridwa ntchito kwa gasi kudzakhudza kwambiri kudulidwa ndi slag.
Nthawi yotumiza: Sep-02-2019