Kazhinji kutaura, kuti uwane yakakwirira michina zvivakwa, yakakwirira extrusion tembiricha inofanira kusarudzwa. Nekudaro, kune iyo 6063 alloy, kana iyo general extrusion tembiricha yakakwira kupfuura 540 ° C, iyo mechanical properties yeprofile haichazowedzeri, uye kana yakaderera kupfuura 480 ° C, simba rekusimba rinogona kunge risina kukodzera.
Kana tembiricha yeextrusion yakakwira zvakanyanya, mabhuru, kuputika, uye kukwenya kwepamusoro uye kunyangwe maburrs anozoonekwa pachigadzirwa nekuda kwealuminium inonamira kune mold. Naizvozvo, kuti uwane zvigadzirwa zvine hupamhi hwepamusoro, tembiricha yakaderera extrusion inowanzoshandiswa.
Midziyo yakanaka ndiyo zvakare poindi yakakosha yekuvandudza kugadzirwa kwealuminium extrusion, kunyanya matatu makuru zvidimbu zvealuminium extruder, aluminium tsvimbo yekudziya choto, uye mold yekupisa choto. Mukuwedzera, chinhu chinonyanya kukosha ndechekuve neakanakisa extrusion opareta.
Thermal Analysis
Aluminium mbariro netsvimbo dzinoda kupiswa pamberi peextrusion kuti dzisvike tembiricha iri pedyo netembiricha ye solvus, kuitira kuti magnesium iri muaruminiyamu tsvimbo inogona kunyunguduka uye kuyerera zvakaenzana mualuminium zvinhu. Kana iyo aluminium tsvimbo yaiswa muextruder, tembiricha haichinji zvakanyanya.
Kana iyo extruder yatanga, iyo hombe yekusundidzira yetsvimbo inoburitsa inosundira iyo yakapfava aluminium zvinhu kubva mugomba rekufa, iyo inoburitsa yakawanda friction, iyo inoshandurwa kuita tembiricha, kuitira kuti tembiricha yeiyo extruded profiles ipfuure tembiricha yesolvus. Panguva ino, iyo magnesium inonyunguduka uye inoyerera ichitenderera, iyo isina kugadzikana zvakanyanya.
Kana tembiricha yasimudzwa, haifanire kunge yakakwira kupfuura iyo solidus tembiricha, zvikasadaro aluminium inonyungudika, uye chimiro hachigone kuumbwa. Kutora 6000 akatevedzana alloy semuenzaniso, tembiricha yealuminium tsvimbo inofanira kuchengetedzwa pakati pe400-540 ° C, zviri nani 470-500 ° C.
Kana tembiricha yakanyanyisa, inokonzera kubvarura, kana yakadzikira, kukurumidza kweextrusion kuchaderedzwa, uye kurwiswa kwakawanda kunoitwa neextrusion kuchashandurwa kuve kupisa, zvichiita kuti kutonhora kukwire. Iyo tembiricha inokwira inoenderana neiyo extrusion kumhanya uye extrusion pressure.
Kupisa kwekubuda kunofanira kuchengetwa pakati pe550-575 ° C, zvishoma pamusoro pe500-530 ° C, kana zvisina kudaro iyo magnesium mualuminium alloy haigoni kunyungudutswa uye inokanganisa zvinhu zvesimbi. Asi haifanirwe kunge yakakwira kupfuura iyo solidus tembiricha, yakawandisa tembiricha yekubuda inokonzeresa kubvarura uye kukanganisa kunaka kweiyo mbiri.
Iyo yakanyanya kunaka extrusion tembiricha yealuminium tsvimbo inofanirwa kugadziridzwa pamwe neiyo extrusion kumhanya kuitira kuti extrusion tembiricha musiyano urege kuderera pane tembiricha ye solvus uye kwete yakakwirira kupfuura iyo solidus tembiricha. Ma alloys akasiyana ane tembiricha dzakasiyana dze solvus. Semuenzaniso, tembiricha ye solvus ye6063 alloy i498°C, nepo iyo ye6005 alloy i510°C.
Kumhanya kwetirakita
Kumhanya kwetirakita chiratidzo chakakosha chekubudirira kwekugadzira. Nekudaro, akasiyana maprofile, maumbirwo, alloys, saizi, nezvimwe zvinogona kukanganisa kumhanya kwetirakita, iyo isingagone kuzara. Mafekitori emazuva ano ekumavirira extrusion profile anogona kuwana kumhanya kwetirakita yemamita makumi masere paminiti.
Extrusion rod rate ndiyo imwe chiratidzo chakakosha chekubudirira. Iyo inoyerwa mumamirimita paminiti uye extrusion tsvimbo yekumhanya inowanzovimbika kupfuura kumhanya kwetirakita paunenge uchidzidza kugadzirwa kwakanaka.
Mold tembiricha yakakosha kumhando ye extruded profiles. Mold tembiricha inofanira kuchengetwa panenge 426 ° C isati yabuda, zvikasadaro inovhara nyore kana kukuvadza mold. Chinangwa chekudzima ndeche "kuomesa" iyo alloying element magnesium, kudzikamisa isina kugadzikana maatomu emagnesium uye kudzivirira iwo kubva pakugadzirisa, kuitira kuchengetedza kusimba kweiyo mbiri.
Nzira nhatu huru dzekudzima dzinosanganisira: kutonhora kwemhepo, kutonhora kwemhute yemvura, kutonhora kwetangi remvura. Mhando yekudzima inoshandiswa inoenderana nekumhanya kweextrusion, ukobvu uye zvinodiwa zvemuviri zveprofile, kunyanya izvo zvinodikanwa zvesimba. Iyo alloy mhando chiratidzo chakazara chekuoma uye elastic zvimiro zvealloy. Aluminium alloy marudzi akatsanangurwa zvakadzama neAmerican Aluminium Association, uye pane shanu dzinokosha dzinoti:
F zvinoreva "sezvakagadzirwa".
O zvinoreva "zvigadzirwa zvakabikwa".
T zvinoreva kuti yave "yakarapwa kupisa".
W zvinoreva kuti zvinhu zvave mhinduro kupisa kurapwa.
H inoreva maaloyi asina kupisa anorapika ayo "anoshanda kutonhora" kana "kuomeswa kwakaomeswa".
Tembiricha uye nguva indekisi mbiri dzinoda kudzora kwakasimba kwekuchembera kwekugadzira. Muchoto chekuchembera chekugadzira, chikamu chese chekushisa chinofanira kunge chakafanana. Kunyangwe kuchembera kwekushisa kwakadzika kunogona kuvandudza simba remaprofile, nguva inodiwa yaizofanira kuwedzera zvinoenderana. Kuti uwane yakanakisa simbi yemuviri zvinhu, zvinodikanwa kuti usarudze yakakodzera aruminiyamu alloy uye yayo yakakwana fomu, shandisa yakakodzera quenching muoti, kudzora yakakodzera kuchembera tembiricha uye kuchembera nguva yekuvandudza goho, goho ndeimwe yakakosha index yekugadzirwa. kunyatsoshanda. Zvinonzi hazvigoneke kuwana goho re100%, nekuti magaro anocheka zvinhu nekuda kwepinch marks dzematarakita nemastretcher.
Yakarongedzwa naMay Jiang kubva kuMAT Aluminium
Nguva yekutumira: Jun-05-2023
