Umphezulu wokuvala iivalvu zentsimbi (Ivalvu yebhabhathane engaqhelekanga ye-DC341X-16 ephindwe kabini) ngokubanzi iveliswa yi (ivalvu ye-TWS)ukuwelda phezu komhlaba. Izinto ezisetyenziselwa ukuwelda phezu komhlaba ze-valve zahlulwe zibe ziindidi ezine eziphambili ngokohlobo lwe-alloy, ezizezi: ii-alloy ezisekelwe kwi-cobalt, ii-alloy ezisekelwe kwi-nickel, ii-alloy ezisekelwe kwi-iron, kunye nee-alloy ezisekelwe kwi-copper. Ezi zinto ze-alloy zenziwe zibe zii-electrodes, ii-wire welding (kuquka ii-wires ezine-flux-cored), ii-fluxes (kuquka ii-transition alloy fluxes) kunye nee-alloy powders, njl.njl., kwaye zibekwe phezu komhlaba nge-manual arc welding, i-oxyacetylene flame welding, i-tungsten argon arc welding, i-inferined arc automatic welding kunye ne-plasma arc welding.
Ukukhethwa kwezinto zokutywina umphezulu wevalvu (DC341X3-10Ivalvu yebhabhathane engaqhelekanga ephindwe kabini(Iringi yokutywina yomzimba) ngokubanzi isekelwe kubushushu bokusetyenziswa, uxinzelelo lokusebenza kunye nokubola kwevalvu, okanye uhlobo lwevalvu, ulwakhiwo lomphezulu wokutywina, uxinzelelo oluthile lokutywina kunye noxinzelelo oluthile oluvumelekileyo, okanye iimeko zemveliso kunye nokuveliswa kweshishini, amandla okucubungula izixhobo kunye nobuchule bobugcisa bomphezulu kunye neemfuno zabasebenzisi. Uyilo olulungiselelweyo kufuneka lwamkelwe, kwaye izinto zomphezulu wokutywina ezinexabiso eliphantsi, inkqubo elula yokuvelisa kunye nokusebenza kakuhle kwemveliso kufuneka zikhethwe phantsi kwemeko yokwanelisa ukusebenza kwe (Ivalvu yebhabhathane ejikelezileyo ene-D341X3-16 ephindwe kabiniivalvu.
Ezinye zezinto ezisetyenziselwa ukugquma umphezulu wokuvala iivalvu zinesimo esinye kuphela, okanye i-electrode okanye i-welding wire okanye i-alloy powder, ngoko ke indlela enye yokuvala umphezulu inokusetyenziswa. Ezinye zenziwe ngeentonga zokuwelda, iintambo zokuwelda okanye ii-alloy powders ngeendlela ezahlukeneyo, ezifana ne-stellite l 6 alloy, zombini ii-welding rods (D802), iintambo zokuwelda (HS111) kunye nee-alloy powders (PT2102), emva koko i-arc welding ngesandla, i-oxy2acetylene flame welding, i-tungsten argon arc welding, i-wire feeding plasma arc welding kunye ne-powder plasma arc welding kunye nezinye iindlela zinokusetyenziswa ukugquma umphezulu. Xa ukhetha izinto zokuvala umphezulu wokuvala iivalvu, kufuneka siqwalasele ukukhethwa kwendlela yokuvala umphezulu ngetekhnoloji evuthiweyo, inkqubo elula kunye nokusebenza kakuhle kwemveliso yeshishini, ukuqinisekisa ukufezekiswa kokusebenza kwayo ekuvelisweni komphezulu wokuvala umphezulu.
Umphezulu wokuvala yinxalenye ephambili yevalvu (Ivalvu yebhabhathane ye-D371X-10 Wafer), kwaye umgangatho wayo uchaphazela ngokuthe ngqo ubomi benkonzo yevalvu. Ukukhetha ngokufanelekileyo izinto zomphezulu wokutywina ivalvu yenye yeendlela ezibalulekileyo zokuphucula ubomi benkonzo yevalvu. Ukungaqondani kakuhle kufuneka kuthintelwe ekukhetheni izinto zomphezulu wokutywina ivalvu.
Intsomi 1: Ubulukhuni bevalvu (D371X3-16C) Izinto zokutywina umphezulu ziphezulu, kwaye ukumelana kwazo nokuguguleka kulungile.
Uvavanyo lubonisa ukuba ukumelana nokuguguleka kwezinto zomphezulu wokutywina ivalvu kuxhomekeka kwisakhiwo sezinto zesinyithi. Ezinye izinto zesinyithi ezine-austenite njenge-matrix kunye nesakhiwo esincinci sesigaba esiqinileyo azinzima kakhulu, kodwa ukumelana kwazo nokuguguleka kulungile kakhulu. Umphezulu wokutywina wevalvu unobunzima obuthile bokuphepha ukwenzakala nokukrwelwa ziinkunkuma ezinzima kwindawo ephakathi. Xa kujongwa yonke into, ixabiso lobunzima HRC35~45 lifanelekile.
Intsomi yesi-2: Ixabiso lezinto zokutywina iivalvu liphezulu, kwaye ukusebenza kwazo kulungile.
Ixabiso lezinto ezibonakalayo lixabiso lazo, ngelixa ukusebenza kwezinto ezibonakalayo kukwimeko yazo, kwaye akukho budlelwane bufunekayo phakathi kwezi zimbini. Isinyithi se-cobalt kwii-alloys ezisekwe kwi-cobalt sivela kumazwe angaphandle, kwaye ixabiso liphezulu, ngoko ke ixabiso lezinto ezisekwe kwi-cobalt liphezulu. Ii-alloys ezisekwe kwi-cobalt zibonakaliswa kukumelana okuhle nokuguguleka kumaqondo obushushu aphezulu, ngelixa xa zisetyenziswa kwiimeko zobushushu eziqhelekileyo neziphakathi, ixabiso/ukusebenza kuphezulu. Ekukhetheni izinto zokuvala umphezulu wevalvu, kufuneka kukhethwe izinto ezinexabiso/ukusebenza okuphantsi.
Intsomi 3: Ukuba umphezulu wokuvala wevalvu unokumelana okuhle nokugqwala kwindawo enamandla yokugqwala, kufuneka ulungelelane nezinye izinto zokugqwala.
Ukumelana nokugqwala kwezinto zesinyithi kunendlela yaso entsonkothileyo, izinto zinokuxhathisa ukugqwala kakuhle kwindawo enamandla yokugqwala, kwaye iimeko zitshintsha kancinci, njengobushushu okanye uxinzelelo oluphakathi, ukumelana nokugqwala kuyatshintshwa. Kwenye indawo yokugqwala, ukumelana nokugqwala kuyahluka ngakumbi. Ukumelana nokugqwala kwezinto zesinyithi kungaziwa kuphela ngovavanyo, kwaye iimeko ezifanelekileyo kufuneka ziqondwe ukuze zisetyenziswe kwizinto ezifanelekileyo, kwaye akufuneki zibolekwe ngokungaboniyo.
Ixesha leposi: Matshi-01-2025
