Ndi zinthu ziti zomwe ziyenera kukumana pamene ma valve osapanga dzimbiri atsekedwa

Mavavuamagwiritsidwa ntchito ngati zida zonse zolekanitsa mpweya m'makina a mankhwala, ndipo malo ambiri osindikizira amapangidwa ndi zitsulo zosapanga dzimbiri.Pogaya, chifukwa cha kusankha kosayenera kwa zipangizo zogaya ndi njira zopangira zolakwika, osati kokha kupanga bwino kwa valve kumachepetsedwa, komanso khalidwe la mankhwala limakhudzidwa kwambiri.Malinga ndi mawonekedwe a zitsulo zosapanga dzimbiri, tasankha kulimba kwantchito komanso kukana kuvala, ndipo mtundu wa mankhwalawa umakhudzidwabe pambuyo poti tinthu tating'ono ta abrasive tathyoledwa pokonza.M'zaka zaposachedwapa, taphunzira zipangizo abrasive amene formulations abrasive zipangizo angathe kukhala sharpness, monga woyera corundum ndi chromium okusayidi, kusankha abrasive zida ndi abrasive njira, etc. The tinthu kukula makamaka amasankha w40, w14, w7 ndi W5, etc. Zinayi ndizoyenera.Kupyolera mu kuyesera, kwalimbikitsidwa ndikugwiritsidwa ntchito popanga zenizeni, zomwe sizimangowonjezera ubwino wa kusindikiza, komanso kumapangitsanso kupanga bwino komanso kupeza zotsatira zabwino kwambiri.
Kuti valavu igaye chogwirira ntchito, choyamba, chida chogaya chimayikidwa ndi mchenga, ndiyeno kugaya kumatheka pogwiritsa ntchito abrasive opangidwa ndi chisakanizo cha njere za abrasive ndi madzi akupera.Mphamvu yopera imatanthawuza mphamvu yomwe ikugwira ntchito pamtunda wopera.Ndi mphamvu yomwe imagwiritsidwa ntchito pa chida chopera ndikuchita pamtunda kuti iwonongeke kudzera muzitsulo zowononga.Ngati kupanikizika kuli kochepa kwambiri, zotsatira zogaya zidzakhala zochepa, ndipo kupanikizika kumawonjezeka.Mphamvu yogaya imakulitsidwa, ndipo kugaya bwino kumakhala bwino.Komabe, pamene kupanikizika kumawonjezeka kufika pamtengo wina, machulukidwe amachitika, ndipo mphamvu yopera imafika pamtengo waukulu.Pambuyo pake, ngati kupanikizika kwa gawo lililonse kumapitilira kuwonjezeka, mphamvuyo idzachepa m'malo mwake.

Izi ndichifukwa choti tinthu tating'onoting'ono ta valve timakhala ndi malire ena amphamvu.Pamene mtengo malire udutsa, iwo adzaphwanyidwa, kupanga particles abrasive bwino ndi kutsitsa kudzikonda akupera luso.Choncho, mphamvu ya unit iyenera kutsimikiziridwa molingana ndi mphamvu ndi kuphwanya makhalidwe a abrasive.Pambuyo pa mayeso, magawo otsatirawa ayenera kusankhidwa: ① Pakugaya movutikira, pa white corundum abrasive, sankhani 0,2 mpaka 0.5 MPa.③ Pakupera bwino, sankhani 0.03 ~ 0.12MPa yamtundu wa yade yoyera.
Liwiro akupera amatanthauza wachibale kayendedwe liwiro la akupera chida pamwamba pa workpiece.Liwiro akupera ndi yofunika ndondomeko chizindikiro kulamulira kuchuluka kwa zotsalira kuchotsa, kuchotsa liwiro ndi khalidwe kukonzedwa pamwamba.Chithunzi 2 ndi njira yolumikizirana pakati pakuchotsa kukula kwa workpiece, makulidwe am'makina ndi liwiro lopera.

Ntchito ya chida chopukutira ndi chida chake chopukutira ndikukonza kwakanthawi kowonongeka ndikupeza kayendetsedwe kake kakupera, ndikusintha mawonekedwe ake a geometric ku workpiece mwanjira inayake.Chifukwa chake, zinthu zomwe zimagaya ziyenera kukhala ndi kuyika koyenera kwa njere za abrasive ndikusunga kwanthawi yayitali kulondola kwake kwa geometric.Gray cast iron HT200 ndi chinthu chabwino chopangira kugaya.Kapangidwe kake kamakhala ndi simenti yolimba komanso yosamva kuvala, ferrite yokhala ndi kulimba bwino komanso pulasitiki, komanso imakhala ndi graphite, yomwe imakhala ndi mafuta odzola komanso osavuta kupanga ndi kukonza..

Pamene akupera nthawi chofunika kupeza anatchula pamwamba khalidwe ndi wamkulu kuposa nthawi chofunika kuchotsa malire.Liwiro lakupera liyenera kuchepetsedwa moyenera.Mukayesa, liwiro lotsatirali ndiloyenera kwambiri: ①Panthawi yopera movutikira, liwiro la zida zopera kapena zogwirira ntchito kuti zigwedwe ndi 20-50m/min.②Pamene valavu ikupera bwino, liwiro la chida chopera kapena chogwiritsira ntchito kuti chikhale pansi ndi 6 ~ 12m / min.Kusankhidwa kwa mtengo wamtundu wa pamwamba Kukula kwapamwamba ndi chimodzi mwa zizindikiro zazikulu za khalidwe lapamwamba.Zili ndi mphamvu yaikulu pa ntchito yapamwamba.Zimakhudza mwachindunji abrasion pamwamba, kuuma kukhudzana ndi kusindikiza ntchito, ndipo nthawi yomweyo zimakhudza ntchito ndi moyo wa mankhwala.Pogwiritsa ntchito njira zosiyanasiyana zopera ndi kukula kwa tinthu tating'onoting'ono, kuuma kwapamwamba komwe kumapezeka kumasiyananso.