Extrusion imatanthauzidwa ngati njira yopangira zinthu, monga aluminiyamu, poyikakamiza kuti idutse potsegula chopangidwa ndi kufa.Zinthu zowonjezera zimatuluka ngati kachidutswa kakang'ono kokhala ndi mbiri yofanana ndi kutsegulira kwakufa.
Chinthu chofunika kwambiri kukumbukira mu ndondomeko extrusion ndi kutentha.Kutentha ndikofunikira kwambiri chifukwa kumapereka aluminiyumu mawonekedwe ake omwe amafunikira monga kuuma ndi kumaliza.
Masitepe mu ndondomeko ya aluminiyamu extrusion
1.Billet iyenera kutenthedwa mpaka pafupifupi 800-925° F.
2.Billet ikafika kutentha komwe kufunidwa, imasamutsidwa ku chotengera komwe filimu yopyapyala ya smut kapena lubricant imawonjezeredwa ku billet ndi nkhosa yamphongo.Chombocho chimagwira ntchito ngati cholekanitsa (mafuta) chomwe chimalepheretsa magawo awiriwo kuti asamamatirane.
3.Billet imasamutsidwa ku chikwapu.
4.Nkhosa yamphongo imagwiritsa ntchito kukakamiza kwa dummy block yomwe, imakankhira billet mpaka ili mkati mwa chidebe.
5.Pansi pa kupsyinjika billet imaphwanyidwa motsutsana ndi ufa, kukhala wamfupi ndi wokulirapo mpaka itakhudzana kwathunthu ndi makoma a chidebe.Pamene aluminiyamu imakankhidwa kudzera mukufa, nayitrogeni wamadzimadzi amayenda mozungulira zigawo zina za ufa kuti aziziziritsa.Izi zimawonjezera moyo wa kufa ndikupanga mpweya wokhazikika womwe umalepheretsa ma oxides kuti asapangike pa mawonekedwe omwe akutuluka.Nthawi zina mpweya wa nayitrogeni umagwiritsidwa ntchito m'malo mwa nayitrogeni wamadzimadzi.Mpweya wa nayitrogeni suziziritsa kufa koma umapanga mpweya wosagwira ntchito.6.Chifukwa cha kupanikizika komwe kumawonjezeredwa ku billet, chitsulo chofewa koma cholimba chimayamba kupyola muzitsulo zakufa.
7.As extrusion extrusion extrusion out the press, kutentha kumatengedwa ndi True Temperature Technology (3T) chida chokwera pa press platen.3T imalemba kutentha kwa aluminium extrusion.Cholinga chachikulu chodziwa kutentha ndikusunga kuthamanga kwambiri.Kutentha komwe kumatuluka kwa extrusion kumadalira alloy.Mwachitsanzo, kutentha kwa chandamale kwa ma aloyi 6063, 6463, 6063A, ndi 6101 ndi 930 ° F (osachepera).Chandamale chotuluka kutentha kwa ma aloyi 6005A, ndi 6061 ndi 950 ° F (osachepera).
8.Extrusions amakankhidwira kunja kwa kufa kupita ku gome lotsogolera ndi chokoka, chomwe chimatsogolera zitsulo pansi pa tebulo lothamanga panthawi ya extrusion.Pamene akukokedwa, extrusion imakhazikika ndi mndandanda wa mafani pamtunda wonse wa tebulo lothamanga ndi lozizira.(Dziwani: Aloyi 6061 ndi madzi ozimitsidwa komanso mpweya wazimitsidwa.)
9.Si onse a billet angagwiritsidwe ntchito.Chotsalira (bata) chimakhala ndi ma oxide kuchokera pakhungu la billet.Mphunoyo imadulidwa ndikutayidwa pamene billet ina imanyamulidwa ndikuwotchedwa ku billet yomwe idanyamulidwa kale ndipo njira yowonjezera ikupitirirabe.Pamene extrusion ikufika kutalika komwe mukufuna, extrusion imadulidwa ndi mawonekedwe a mbiri kapena shear.
10.Metal imasamutsidwa (kudzera pa lamba kapena machitidwe oyenda matabwa) kuchokera pa tebulo lothamanga kupita ku tebulo lozizira.
11.Aluminiyamuyo itakhazikika ndikusuntha patebulo lozizira, ndiye imasunthira ku machira.Kutambasula kumawongola zotulukapo ndikuchita 'kulimbikira ntchito' (kulumikizanso kwa mamolekyulu komwe kumapangitsa kuti aluminiyumu ionjezere kuuma komanso mphamvu zowonjezera).
12.Chotsatira ndikucheka.Pambuyo potambasula ma extrusions amasamutsidwa ku tebulo la macheka ndikudula kutalika kwake.Kulekerera kwa macheka ndi 1/8 inchi kapena kupitilira apo, kutengera kutalika kwa macheka.
Zigawozo zikadulidwa, zimayikidwa pa chipangizo chonyamulira ndikuzilowetsa m'mauvuni akale.Kutentha kwa kutentha kapena kukalamba kochita kupanga kumalimbitsa chitsulo mwa kufulumizitsa ukalamba kumalo olamulidwa ndi kutentha kwa nthawi yoikika.
Nthawi yotumiza: Jun-23-2016