1. Lub hauv paus ntsiab lus ntawm kev laus
Thaum tshav kub kub-kho tau siv zog ntxiv aluminium profiles xws li 6061, 6063, 6005 thiab 6013 (tsuas yog Al-Mg-Si series) tsim cov tshuaj supersaturated tom qab extrusion, kev kho cua sov thiab quenching, raws li cov ntsiab lus alloying Mg thiab Si tau nrawm nrawm rau hauv aluminium matrix. Qhov no microstructure yog thermodynamically tsis ruaj khov. Nyob rau hauv chav tsev kub los yog tswj cov cua sov, cov kua atoms diffuse thiab aggregate spontaneously, sequentially tsim GP aav, metastable 'theem, ' theem, thiab thaum kawg lub equilibrium Mg₂Si theem. Lub uniformly dispersed nano precipitates tus pin dislocations thiab grain ciam teb rau harden cov khoom thiab txhim kho nws lub zog. Cov txheej txheem nag lossis daus no tau sau tseg raws li cov txiaj ntsig kev laus, uas yog cov khoom siv tseem ceeb uas yuav tsum tau tswj nruj me ntsis hauv CNC machining ntawm aluminium profiles.
Kev laus muab faib uanatural aging (chav-temperature aging)thiabArtificial aging (siab kub aging). Nws kuj suav nrog peb theem: qis-laus, ncov aging thiab dhau-laus. Cov kev laus sib txawv ncaj qha txiav txim siab CNC txiav kev ua tau zoo, qhov ruaj khov ntawm qhov chaw, cov khoom siv kho tshuab thiab qhov chaw ua haujlwm zoo.
Kev lag luam kev lag luam T-temper txhais: T4=Kev kho cua sov + ntuj aging; T5=Extrusion cua txias + dag dag; T6=Dej quenching tom qab kho cov tshuaj + ncov dag dag; T651 / T6511: Nrog pre-stretching rau kev ntxhov siab nyem, tshwj xeeb tshaj yog haum rau high-precision CNC machining.
2. Kev faib tawm ntawm cov teebmeem kev laus thiab lawv qhov cuam tshuam rau CNC Machining
2.1 Natural Aging Effect (Room-temperature Aging)
Tom qab quenching, cov profiles spontaneously tsim GP aav ntawm ambient kub. Hardness thiab yield zog nce maj mam nrog lub sij hawm cia thaum ductility maj mam txo. Rau 6XXX series alloys, lub ntuj aging ncov yog feem ntau mus txog nyob rau hauv ob peb hnub mus rau ntau tshaj kaum hnub, ua raws li los ntawm ib tug qeeb kev loj hlob.
Cov ntsiab lus mob rau CNC machining:
Cov khoom siv tsis ruaj khov: Cov ntaub ntawv los ntawm cov khoom siv tib yam nrog lub sijhawm cia sib txawv qhia qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv, kev txiav tsis zoo thiab cov cuab yeej hnav, ua rau cov khoom tsis zoo sib xws hauv cov khoom loj.
Cov nyhuv khaws cia (txhim kev laus): Yog tias cov khoom qub qub tau ua tiav tom qab lub sijhawm ntawm kev laus, qhov kawg siab kawg lub zog yuav poob, uas ua rau lub zog tsis tsim nyog rau kev txiav txim ntau ntawm kev lag luam txawv teb chaws kub dab dej thiab tswj vaj tse.
Ntuj aging tom qab ntxhib machining: Ib tug loj npaum li cas ntawm cov khoom raug tshem tawm thaum lub sij hawm milling ntxhib, rhuav lub qub kev nyuaj siab tshuav nyiaj li cas. Kev qeeb deformation txuas ntxiv nyob rau hauv cov hnub tom ntej, ua rau flatness thiab parallelism out-of-tolerance, uas yog ib qho tseem ceeb nyob rau hauv nyias-walled shells, ntev qhia rails thiab qhov cua grilles.
Daim ntawv thov scenarios:Haum rau cov khoom uas yuav tsum tau khoov, qhov nthuav dav thiab cov yas txuas ntxiv; Feem ntau tsis tau txais kev pom zoo rau high-precision tiav CNC Cheebtsam.
2.2 Artificial Aging Effect (Controlled-temperature Aging, Mainstream T5/T6 Process)
Profiles yog tuav ntawm qhov kub thiab txias ntawm 150-185℃nyob rau hauv ib tug laus lub qhov cub kom ceev precipitate tsim thiab ua kom tiav lub hom phiaj mechanical zog nyob rau hauv ib tug luv luv lub sij hawm. Qhov no yog txoj kev laus tshaj plaws rau CNC txhuas profiles.
Kev laus: Lub sijhawm tuav tsis txaus; precipitates yog me me thiab tsawg nyob rau hauv kom muaj nuj nqis. Lub zog thiab hardness kuj tsawg nrog zoo ductility. Txiav yog lub teeb, tab sis ib feem rigidity tsis txaus, ua rau txiav chatter, clamping deformation thiab springback tom qab machining.
Peak kev laus: Optimal txheej txheem qhov rais nrog qhov loj tshaj plaws kom muaj nuj nqis thiab uniform loj ntawm '' precipitates. Lub zog thiab hardness ncav cuag tus nqi siab tshaj plaws. Nws yog feem ntau siv rau cov khoom siv, cov dab dej kub thiab cov khoom siv aluminium. Machining yog ruaj khov nrog cov khoom txaus rigidity, thaum ductility txo qis thiab nti-tawg cov yam ntxwv hloov. Cov cuab yeej tshwj xeeb aluminium-qib txiav thiab cov cuab yeej sib xws yuav tsum muaj.
Kev laus dhau lawm: Ntau lub sij hawm tuav los yog kub siab ua rau coarsening thiab spheroidization ntawm precipitates. Lub zog thiab hardness poob, thaum toughness thiab kev nyuaj siab corrosion kuj txhim kho. Txiav tsis kam yog qis dua thiab machining kev ntxhov siab me dua nrog qhov zoo dua qhov ruaj khov, siv rau cov khoom siv precision uas yuav tsum tau muaj kev ruaj ntseg ntev. Qhov tsis zoo yog tias lub zog tsis tuaj yeem ua tau raws li qhov yuav tsum tau muaj ntawm cov khoom siv thauj khoom.
2.3 Kev Nyuaj Siab Kev Nyuaj Siab (Kev Nyuaj Siab-Relief Aging, Core Process for Precision CNC Parts)
Nws yog ib qho yooj yim kom tsis meej pemnag lossis daus txhawb kev lausthiabkev nyuaj siab-relief aging. Extrusion, quenching thiab ntxhib machining lock residual stress hauv profiles. Kev ntxhov siab thiab tso tawm kev ntxhov siab tshwm sim ib txhij thaum laus, hu uastress-relief effect ntawm aging.
Factory aging ntawm profiles: Tshem tawm cov kev ntxhov siab seem ntawm extrusion thiab quenching.
Kev laus nruab nrab tom qab kev ua haujlwm ntxhib (Rough machining → Aging → Finish machining): Ib qho nyiaj loj raug tshem tawm hauv CNC ntxhib milling thiab thawj qhov kev ntxhov siab yog cuam tshuam. Tsawg-kub laus los yog chav-kub cia tso tawm kev ntxhov siab ua ntej, yog li qhov ntev yuav tsis txav tom qab ua tiav machining. Qhov no yog cov txheej txheem txheej txheem rau high-precision CNC txhuas qhov chaw xws li kev lag luam tswj vaj tse, photovoltaic profiles thiab precision brackets.
Qhov tseem ceeb sib txawv: Lub luag haujlwm tseem ceeb ntawm kev laus yog nag lossis daus ntxiv; kev ntxhov siab so yog ib qho kev cuam tshuam nrog. T651 pre-stretched profiles txais yuav ncab ua ntej kev laus rau offset quenching kev nyuaj siab thiab zoo heev txo qhov nyiam ntawm kev laus deformation.
2.4 Reversion and Re-aging (RRA, High-grade High-strength Aluminium Profiles)
Feem ntau siv rau 7-series high-strength aluminium alloys. Cov txheej txheem suav nrog kev laus siab tshaj plaws, luv luv-temperature reversion thiab theem nrab qis-kub laus laus, ntsuas lub zog siab thiab kev ntxhov siab corrosion. Nws yog siv nyob rau hauv high-end CNC structural qhov chaw, thaum tsis tshua pom zoo rau 6-series txhuas profiles vim tus nqi siab thiab nqaim txheej txheem qhov rais.
3. Tsib qhov cuam tshuam loj loj los ntawm Kev Laus Los (CNC Machining Sab)
3.1 Coupling nyhuv ntawm Mechanical Properties thiab Machinability
Kev laus lub xeev ncaj qha hloov cov yield-rau-tensile piv thiab elongation ntawm aluminium alloys. Cov hnub nyoog qis dua aluminium yog mos thiab yooj yim rau kev txhim kho ntug thiab cov cuab yeej adhesion; ncov-laus cov khoom ua tiav kev txiav ruaj khov thiab zoo nti tawg; cov khoom muaj hnub nyoog dhau los tau zoo dua ductility thiab superior nto tiav tom qab ua tiav. Yog tias tib qhov kev pab cuam CNC siv rau cov profiles sib txawv ntawm cov laus laus, cov cuab yeej tsis sib xws, burrs, seem drift thiab cuab yeej lub neej yuav tshwm sim. Rau OEM txhuas profile txiav txim rau cov neeg muas zaub txawv teb chaws, kos duab kom meej meej qhia T5 / T6 temper, uas tseem ceeb locks ciam teb ntawm txiav kev ua tau zoo thiab txhua yam khoom txhais los ntawm kev laus.
3.2 Kev laus Deformation nyhuv (Qhov tseem ceeb ntawm Batch Scrap)
Kev laus deformation poob rau hauv ob pawg: ① Deformation thaum laus kho cua sov: Asymmetric cross-section lossis loj phab ntsa thickness sib txawv ntawm cov profiles ua rau muaj kev ntxhov siab tsis sib xws thaum cua sov, ua rau khoov thiab sib tw, thiab cov ntaub ntawv tsis raug ntawm CNC fixtures. ② Creep deformation tom qab machining: Cov khoom yog dimensionally tsim nyog ntawm lub tshuab, tab sis deform qeeb nyob rau hauv lub sij hawm mus rau lub lis piam tom qab offline vim tsis tu ncua laus laus thiab maj mam tso tawm. Ntev aluminium txhawb rods, ntev rails thiab nyias cov hniav zoo nkauj strips yog cov khoom uas muaj kev pheej hmoo siab.
Tswj cov kev daws teeb meem: Ua ntej tshaj plaws profiles nrog symmetric cross-section; txais kev laus nruab nrab tom qab kev ua haujlwm ntxhib nrog kev ua tiav nyiaj; siv me me txiav qhov tob hauv kev ua tiav thiab tsis txhob hnyav unilateral milling.
3.3 Kev laus cuam tshuam rau hluav taws xob conductivity thiab Anodizing nto
Mg₂Si nag lossis daus hloov cov matrix conductivity. Hluav taws xob conductivity nce nrog kev laus zuj zus. Rau cov dab dej kub, cov khoom muaj hnub nyoog tag nrho muab cov thermal conductivity ntau dua thiab zoo dua cov cua kub dissipation. Lub caij no, cov txheej txheem kev laus cuam tshuam rau cov txiaj ntsig anodizing: cov hnub nyoog qis dua yuav pom cov xim sib txawv thiab tsis sib xws; Peak-aged profiles tsim cov yeeb yaj kiab zoo thiab ruaj khov oxide, uas yog cov qauv kev xaiv rau txhuas vaj tse thiab cov khoom siv kho kom zoo nkauj.
3.4 Aging Sensitivity thiab Alloy Difference Effect
6063 muaj lub qhov rais dav dav thiab haum rau T5 huab cua-txias kev laus rau lub qhov rooj, qhov rais thiab cov hniav zoo nkauj . 6061 muaj ntau dua quenching rhiab heev thiab yog qhov zoo dua T6 dej-quenched rau CNC structural qhov chaw . 7075 thiab lwm yam high-strength aluminium alloys yog rhiab heev rau kev laus. Natural aging cia yuav hloov pauv cov txiaj ntsig kev laus tom ntej, yog li cov khoom siv tuaj yeem tsis tuaj yeem khaws cia ua ntej kev kho cua sov.
3.5 Aging Delayed Effect (Cov Txheej Txheem Risk Point)
Kev ncua kev laus tom qab quenching: Yog tias lub sijhawm nruab nrab ntawm quenching thiab furnace aging yog ntev dhau lawm, ntau GP zones tsim thaum lub sij hawm ntuj tsim nyob rau hauv chav tsev kub thiab suppress lub nag lossis daus ntawm 'theem nyob rau hauv cov khoom qub tom qab, yog li lub zog zaum kawg ua tsis tau raws li qhov yuav tsum tau ua. Qhov no yog qhov feem ntau zais qhov tsis zoo hauv cov nroj tsuag kho cua sov thiab CNC rhiav. Unqualified tensile lub zog thiab hardness sampling nyob rau hauv kev txiav txim export feem ntau yog vim li cas.
4. Aging Control Solutions rau CNC Machining Kev Lag Luam (Cov Txheej Txheem)
Kev tswj cov khoom nkag: Khaws cov ntaub ntawv los ntawm T temper thiab cov ntaub ntawv quenching hnub thiab lub sijhawm cia. Xaiv T651 cov kev ntxhov siab-relieved profiles nyiam rau qhov chaw siab.
Embed aging rau hauv cov txheej txheem ntws: Cov txheej txheem txheej txheem rau cov khoom siv high-precision: Extrusion & tov kev kho cua sov → Hoobkas aging → Rough machining → Tsawg-kub kev nyuaj siab-relief aging / Chav kub cia rau 24-72 h → Semi-finishing → Finish machining.
Matching txheej txheem machining: Siv high-speed, high-feed ntse carbide los yog PCD cutters rau txhuas ntawm peak-aged profiles; txo qhov kub thiab txias rau cov hnub nyoog qis dua qhov profile kom txo qis cov ntug tsim.
Xauv aging tsis: Kho qhov kub thiab txias thiab tuav lub sij hawm raws li qib alloy thiab seem thickness. Txuas lub sijhawm tuav rau cov phab ntsa tuab kom tsis txhob muaj kev laus ntawm qhov chaw mus rau qhov tseem ceeb.
Kev tshuaj xyuas cov khoom tiav: Dimensional soj ntsuam tsis tuaj yeem tsuas yog nqa tawm ntawm lub tshuab rau precision qhov chaw. Rov kuaj dua tom qab kev laus cia kom paub tseeb tias qhov ruaj khov mus ntev.
5. Cov ntsiab lus
Cov nyhuv laus ntawm CNC machined aluminium profiles yog ntau tshaj qhov yooj yim hardening. Nws yog ib qho kev hloov pauv ua ke nrog cov nag lossis daus hauv microscopic, kev ntxhov siab so, cov khoom siv kho tshuab, txiav cov yam ntxwv, qhov ntev stability, thermal thiab hluav taws xob ua haujlwm. Rau txhuas profile CNC processors, kev cai extrusion manufacturers thiab txawv teb chaws lag luam OEM lag luam, kev laus ua raws li cov tub ntxhais node txuas extrusion, kev kho cua sov, CNC milling thiab nto kho. Ntau yam tsis zoo xws li kev ua tsis zoo, tsis muaj zog, anodizing xim txawv thiab tom qab tsim deformation yog qhov tseem ceeb los ntawm kev tswj kev laus tsis raug. Kev siv cov txiaj ntsig kev laus thiab kev sib txuam CNC cov txheej txheem tuaj yeem paub txog kev xa khoom ruaj khov ntawm cov dab dej kub, cov tsev nyob hauv tsev, cov khoom sib dhos thiab cov hniav zoo nkauj.
