Ngokuqhelekileyo, ukuze ufumane iipropati eziphezulu zemishini, ukushisa okuphezulu kwe-extrusion kufuneka kukhethwe. Nangona kunjalo, kwi-alloy ye-6063, xa ubushushu be-extrusion jikelele bungaphezulu kwe-540 ° C, iipropathi zomatshini zeprofayili aziyi kuphinda zinyuke, kwaye xa zingaphantsi kwe-480 ° C, amandla okuqina angabikho.
Ukuba iqondo lobushushu le-extrusion liphezulu kakhulu, amaqamza, iintanda, kunye nemikrwelo yomphezulu kunye nee-burrs ziya kuvela kwimveliso ngenxa ye-aluminiyam encamathele kubumba. Ke ngoko, ukuze ufumane iimveliso ezinomgangatho ophezulu womphezulu, amaqondo obushushu asezantsi asetyenziswa rhoqo.
Izixhobo ezilungileyo zikwayinqaku eliphambili lokuphucula ukusebenza kakuhle kwe-aluminium extrusion, ngakumbi amacandelo amathathu amakhulu e-aluminium extruder, i-aluminium intonga yokufudumeza isithando somlilo, kunye nesithando sokufudumala somlilo. Ukongeza, eyona nto ibalulekileyo kukuba nomqhubi obalaseleyo we-extrusion.
Uhlalutyo lweThermal
Imivalo ye-aluminium kunye neentonga kufuneka zifudunyezwe kwangaphambili ngaphambi kokuba i-extrusion ifikelele kwiqondo lokushisa elikufutshane nobushushu be-solvus, ukwenzela ukuba i-magnesium kwintonga ye-aluminium inyibilike kwaye ihambe ngokulinganayo kwizinto ze-aluminium. Xa intonga ye-aluminium ifakwe kwi-extruder, iqondo lokushisa alitshintshi kakhulu.
Xa i-extruder iqala, amandla amakhulu okutyhala intonga ekhutshiweyo ityhala izinto ezithambileyo ze-aluminiyam ngaphandle komngxuma wokufa, ovelisa ukukhuhlana okuninzi, okuguqulwa kube yiqondo lobushushu, ukuze ubushushu beprofayili ekhutshiweyo budlule ubushushu be-solvus. Ngeli xesha, i-magnesium iyanyibilika kwaye ijikeleze, engazinzanga kakhulu.
Xa iqondo lokushisa liphakanyisiwe, akufanele libe liphezulu kunokushisa kwe-solidus, ngaphandle koko i-aluminium iya kunyibilika, kwaye iphrofayili ayinakwenziwa. Ukuthatha i-6000 series alloy njengomzekelo, ubushushu bentonga ye-aluminiyam kufuneka igcinwe phakathi kwe-400-540 ° C, ngokukhethekileyo i-470-500 ° C.
Ukuba iqondo lokushisa liphezulu kakhulu, liya kubangela ukukrazula, ukuba liphantsi kakhulu, isantya se-extrusion siya kuncitshiswa, kwaye ininzi ye-friction eyenziwa yi-extrusion iya kuguqulwa ibe ngubushushu, ibangele ukunyuka kweqondo lokushisa. Ukunyuka kweqondo lokushisa kuhambelana nesantya se-extrusion kunye noxinzelelo lwe-extrusion.
Ukushisa kwe-outlet kufuneka kugcinwe phakathi kwe-550-575 ° C, ubuncinane ngaphezu kwe-500-530 ° C, ngaphandle koko i-magnesium kwi-alloy aluminium ayikwazi ukuncibilika kwaye ichaphazele iipropati zetsimbi. Kodwa akufuneki ibe phezulu kunobushushu be-solidus, ubushushu obuphezulu kakhulu bokukhutshwa kuya kubangela ukukrazula kunye nokuchaphazela umgangatho womphezulu weprofayile.
Elona qondo liphezulu lobushushu be-extrusion yentonga ye-aluminiyam kufuneka luhlengahlengiswe ngokudityaniswa nesantya se-extrusion ukuze umahluko weqondo lobushushu le-extrusion ungabi ngaphantsi kobushushu be-solvus kwaye ungabi phezulu kunobushushu be-solidus. Ii-alloys ezahlukeneyo zinamaqondo obushushu e-solvus ahlukeneyo. Umzekelo, ubushushu be-solvus be-6063 i-alloy yi-498 ° C, ngelixa i-alloy ye-6005 yi-510 ° C.
Isantya seTrektara
Isantya setrektara sisalathiso esibalulekileyo sokusebenza kakuhle kwemveliso. Nangona kunjalo, iiprofayili ezahlukeneyo, iimilo, i-alloys, ubukhulu, njl njl. Iifektri zanamhlanje zeprofayili ye-western extrusion zinokufikelela kwisantya setrektara yeemitha ezingama-80 ngomzuzu.
Ireyithi ye-Extrusion rod sesinye isalathisi esibalulekileyo semveliso. Ilinganiswa ngeemilimitha ngomzuzu kwaye isantya sentonga ye-extrusion sihlala sithembeka ngakumbi kunesantya setrektara xa ufunda ukusebenza kakuhle kwemveliso.
Ubushushu bomngundo bubaluleke kakhulu kumgangatho weeprofayili ezikhutshiweyo. Iqondo lobushushu lokungunda kufuneka ligcinwe malunga ne-426 ° C phambi kokukhutshwa, ngaphandle koko kuya kugquma ngokulula okanye konakalise ukungunda. Injongo yokucima "ukukhenkcela" i-alloying element ye-magnesium, ukuzinzisa ii-athomu ze-magnesium ezingazinzanga kunye nokuthintela ukuba zingahlali, ukuze kugcinwe amandla eprofayili.
Iindlela ezintathu eziphambili zokucinywa zibandakanya: ukupholisa umoya, ukupholisa inkungu yamanzi, ukupholisa itanki yamanzi. Uhlobo lokucima olusetyenzisiweyo luxhomekeke kwisantya se-extrusion, ubukhulu kunye neempawu zomzimba ezifunekayo zeprofayili, ngokukodwa iimfuno zamandla. Uhlobo lwe-alloy luphawu olubanzi lobunzima kunye neempawu ze-elastic ze-alloy. Iintlobo zealluminiyam zichazwe ngokweenkcukacha yi-American Aluminium Association, kwaye kukho iindawo ezintlanu ezisisiseko:
UF uthetha "njengoko yenziweyo".
O kuthetha "imveliso esele ifakiwe".
T ithetha ukuba "iphathwe ubushushu".
W kuthetha ukuba imathiriyeli iye yaphathwa ubushushu besisombululo.
I-H ibhekiselele kwingxubevange enganyangekiyo bubushushu “esebenza ngokubanda” okanye “ubunzima bokuqina”.
Ubushushu kunye nexesha zizalathisi ezibini ezifuna ulawulo olungqongqo lokuguga okwenziweyo. Kwisithando somlilo sokuguga, yonke indawo yobushushu kufuneka ifane. Nangona ukuguga kobushushu obuphantsi kunokuphucula amandla eprofayili, ixesha elifunekayo kuya kufuneka linyuke ngokufanelekileyo. Ukuze kuphunyezwe iimpawu zentsimbi ngokomzimba, kuyimfuneko ukuba ukhethe i-alloy aluminiyam efanelekileyo kunye neyona ndlela ilungileyo, sebenzisa indlela yokucima efanelekileyo, ukulawula ubushushu obufanelekileyo kunye nexesha lokuguga ukuze kuphuculwe isivuno, isivuno sesinye isalathiso esibalulekileyo semveliso. ukusebenza kakuhle. Ngokwethiyori akunakwenzeka ukufumana i-100% yesivuno, kuba iimpundu ziya kunqumla imathiriyeli ngenxa yokuxinwa kwamanqaku eetrektara kunye neestretcher.
Ihlelwe nguMay Jiang esuka kwiMAT Aluminium
Ixesha lokuposa: Jun-05-2023
