Phakathi kweama-valve athwala ingcindezi of amapayipi ezimboni, ama-valve ensimbizisetshenziswa kabanzi ngenxa yomnotho wabo wezindleko kanye nokuguquguquka kokuklama.Kodwa-ke, ngenxa yokuthi inqubo yokuphonsa ikhawulelwe usayizi, ukushuba kodonga, isimo sezulu, izinto ezingavuthiwe kanye nokusebenza kokwakhiwa kwe-casting, izici ezihlukahlukene zokuphonsa ezifana namabhamuza, ama-pores, imifantu, i-shrinkage porosity, imigodi yokuncipha kanye nokufaka kuzovela ekubunjweni, ikakhulukazi ama-alloys okuphonsa isihlabathi.Ukusakaza kwensimbi ukuze uthole okwengeziwe.Ngenxa yokuthi izakhi eziningi ze-alloying ensimbi, lapho insimbi encibilikisiwe iba mpofu kakhulu, maningi amathuba okuba ikhiqize izici zokubunjwa.Ngakho-ke, ukuhlonzwa kweziphambeko kanye nokwakhiwa kwenqubo ye-welding yokulungisa enengqondo, eyongayo, esebenzayo futhi enokwethenjelwa ukuze kuqinisekiswe ukuthi i-valve ngemva kokulungisa i-welding ihlangabezana nezidingo zekhwalithi sekuyinkinga evamile ekusetshenzisweni okushisayo nokubandayoama-valve.Lesi sihloko sethula indlela yokulungisa i-welding kanye nesipiliyoni seziphambeko eziningana ezivamile zokukhishwa kwensimbi (induku yokushisela imelelwa uphawu oludala).
Ukuphatha iphutha
1. Ukwahlulela okungalungile
Ekwenziweni kokukhiqiza, ezinye iziphambeko zokuphonsa azivunyelwe ukulungisa ukushisela, njengokuqhekeka okungena ngaphakathi, amaphutha okungena (ukungena phansi), izimbotshana zezinyosi, ukufakwa kwesihlabathi okungenakususwa, kanye ne-shrinkage porosity enendawo engaphezu kwamasentimitha angama-square angama-65, njll. kanye Nobunye ububi obukhulu obungeke bulungiswe njengoba kuvunyelwene kwinkontileka phakathi kwezinhlangothi zombili.Uhlobo lwesici kufanele lwahlulelwe ngaphambi kokulungisa i-welding.
2. Ukususwa kwesici
Embonini, i-carbon arc air gouging ivamise ukusetshenziselwa ukufutha amaphutha okukhipha, bese kusetshenziswa umshini wokugaya i-engeli ophathwayo ukuze upholishe izingxenye ezinesici ukuveza ukucwebezela kwensimbi.Kodwa ekusebenzeni kokukhiqiza, kungaphezulu ukusebenzisa i-carbon steel electrode enamandla amanje ukususa amaphutha, nokusebenzisa i-angle grinder ukugaya i-metallic luster.Ngokuvamile, ukukhubazeka kokuphonsa kungaqedwa ngokusebenzisa i-<4mm-J422 electrode kanye ne-current ye-160-180A ukuze kukhishwe amaphutha.I-engeli grinder igaya isici sibe umumo ongu-U ukuze kwehliswe ingcindezi yokushisela.Amaphutha asuswe ngokuphelele, futhi ikhwalithi yokulungisa i-welding yinhle.
3. Ukushisa kwezingxenye ezinesici
Okwensimbi ye-carbon steel kanye ne-austenitic stainless steel castings, lapho indawo yengxenye yokulungisa yokushisela ingaphansi kuka-65cm2 futhi ukujula kungaphansi kuka-20% noma u-25mm wobukhulu bokubunjwa, ukushisa kwangaphambili ngokuvamile akudingekile.Kodwa-ke, ekubunjweni kwensimbi ye-pearlitic efana ne-ZG15Cr1Mo1V ne-ZGCr5Mo, ngenxa yokuthambekela okuphezulu kokuqina kwensimbi nokuqhekeka kalula ekushiseleni okubandayo, ukushisa kwangaphambili kufanele kwenziwe.Isikhathi sokubamba kufanele sibe okungenani imizuzu engama-60.Uma ukubunjwa kungakwazi ukushisisa sekukonke, kungashiswa ku-300-350 ° C nge-oxygen-acetylene endaweni enesici futhi kwandiswe ngo-20mm (ukubuka okubomvu okumnyama endaweni emnyama), kanye nelangabi elikhulu lobhaqa elingathathi hlangothi. Isibhamu sisetshenziswa kuqala endaweni enesici nasezindaweni ezizungezile.Swayipha umbuthano ngokushesha imizuzu embalwa, bese uhamba kancane imizuzu engu-10 (kuye ngokuthi ubukhulu besici), ukuze isici sishiswe ngokugcwele bese silungiswa ngokushesha.
Ukuze uthole imininingwane eyengeziwe, sicela uvakashelewww.cvgvalves.com.Oxhumana nayesales@cvgvalves.com.