1 Kev kho cov khoom sib xyaw
Curing cycles yog lub voj voog ntawm lub sijhawm, qhov kub thiab txias siv los kho cov thermoset resin systems lossis prepregs. Kev kho ntawm qhov kho yog qhov tseem ceeb raws li kev kho ntawm cov khoom qub. Tsis zoo li kev kho hlau qhov twg cov khoom yog prefabricated, composite kho yuav tsum tau engineers los fabricate cov khoom. Qhov no suav nrog tag nrho kev cia khoom, kev ua haujlwm, thiab kev tswj xyuas kom zoo. Lub voj voog kho dua tshiab rau kev saib xyuas dav hlau pib nrog cov khoom khaws cia. Cov ntaub ntawv khaws cia tsis raug yuav pib kho ua ntej lawv tuaj yeem siv los kho dua tshiab. Txhua lub sijhawm, qhov kub thiab txias, thiab cov kev xav tau yuav tsum tau ua kom tau raws li thiab sau tseg. Xa mus rau Phau Ntawv Qhia Txog Kev Kho Cuab Yeej Cuab Yeej los txiav txim siab txog lub voj voog kho kom raug rau qhov yuav tsum tau kho.
1.1 Chav ntsuas kub kho
Chav tsev kub curing yog qhov zoo tshaj plaws ntawm kev txuag hluav taws xob thiab kev txav mus los. Chav tsev kub kho ntub dej nteg- kho kom zoo tsis rov ua kom lub zog lossis ua haujlwm ntawm qhov qub 250℉ (121 degree) lossis 350℉ (176.67 degree) kho tivthaiv thiab feem ntau yog siv rau cov ntaub ntub dej fiberglass nteg- kho cov khoom uas tsis yog-tseem ceeb. Kev kho cua sov hauv chav tsev tuaj yeem ua kom nrawm dua los ntawm cua sov. Kev ua haujlwm siab tshaj plaws yog ua tiav ntawm 150℉ (65.56 degree). Lub hnab nqus tsev tuaj yeem siv los sib sau ua ke ntawm laminate thiab muab txoj hauv kev rau huab cua thiab volatiles kom dim.
1.2 High kub curing
Tag nrho cov prepregs raug kho siv lub voj voog kub. Qee qhov kev kho cov ply ntub dej siv cov txheej txheem kho kom siab kom muaj zog ntawm kev kho thiab ua kom cov txheej txheem kho kom zoo. Kev kho qhov cub thiab cov tub rog kub siv lub tshuab nqus tsev los sib sau ua ke ntawm laminate thiab muab txoj hauv kev rau huab cua thiab volatiles kom dim. Autoclaves siv lub tshuab nqus tsev thiab lub siab zoo los sib sau ua ke ntawm laminate thiab muab txoj hauv kev rau huab cua thiab volatiles kom dim. Feem ntau cov cua sov siv cov programmable computer tswj kom khiav lub voj voog kho. Tus neeg teb xov tooj tuaj yeem xaiv los ntawm cov ntawv qhia zaub mov uas muaj kev kho mob lossis sau nws tus kheej txoj haujlwm.
Thermocouples muab tso rau ze ntawm qhov kho thiab lawv muab cov lus qhia kub rau lub cua sov. Kev kho kub zoo rau cov khoom sib xyaw yog 250℉ (121 degree) lossis 350℉ (176.67 degree) Qhov kub ntawm qhov loj hauv qhov cub lossis autoclave yuav txawv ntawm qhov kub ntawm qhov cub lossis autoclave thaum lub sijhawm kho vim lawv ua zoo li lub dab dej kub. Qhov kub ntawm ib feem yog qhov tseem ceeb tshaj plaws rau kev kho kom zoo, yog li cov thermocouples muab tso rau ntawm ib feem los saib xyuas thiab tswj qhov kub ntawm qhov. Lub qhov cub lossis autoclave cua kub sojntsuam siv los ntsuas qhov cub lossis autoclave kub tsis yog ib qho khoom siv txhim khu kev qha rau kev txiav txim siab qhov kub thiab txias. Yog hais tias ib feem los yog cov cuab yeej ua raws li lub dab dej kub, qhov cub kub thiab qhov kub ntawm qhov yuav txawv heev.
Qhov kub kub curing voj voog muaj tsawg kawg yog peb ntu.
-Ua kom sov:chav tsev cua sov sov ntawm qhov kub thiab txias, feem ntau ntawm 3℉ (-16.1 degree) thiab 5℉ (-15 degree) ib feeb.
-Tuav:chav tsev cua sov tswj qhov kub thiab txias rau lub sijhawm ua ntej.
-Cua txias:chav tsev cua sov txias ntawm qhov kub thiab txias. Qhov txias txias feem ntau yog qis dua 5 ℉ ib feeb. Thaum lub cua sov chav poob qis dua 125 ℉, qhov yuav tsum tau disassembled. Thaum kho qhov chaw nrog lub autoclave, nco ntsoov txo qhov siab hauv lub autoclave ua ntej qhib qhov rooj. Raws li pom hauv daim duab 53.
Daim duab 53: Autoclave curing txheej txheem
Txoj kev kho yog ua tiav los ntawm kev siv cov cua sov thiab siab rau lub laminate. Raws li qhov kub thiab txias, cov resin pib soften thiab ntws. Ntawm qhov kub thiab txias, qhov tshwm sim me me tshwm sim. Txhua yam kab mob tsis haum, xws li huab cua lossis dej, raug rho tawm ntawm lub laminate nrog lub tshuab nqus tsev lub sijhawm no. Lub laminate yog compacted los ntawm kev siv lub siab, feem ntau yog lub tshuab nqus tsev (qhov siab ntawm huab cua); lub autoclave siv lub siab ntxiv, feem ntau yog 50-100 psi Raws li qhov kub nce mus txog qhov ntsuas kub kho zaum kawg, tus nqi ntawm cov tshuaj tiv thaiv nce ntxiv thiab cov resin pib gel-harden. Tuav ntawm qhov kev kho zaum kawg tso cai rau cov resin kom tiav kev kho thiab tau txais cov yam ntxwv yam xav tau.
2 Kev kho ntawm cov khoom sib xyaw honeycomb sandwich
Qhov feem ntau ntawm cov khoom siv hauv aerospace tam sim no yog kev puas tsuaj - cov khoom siv sib xyaw ua ke sib xyaw ua ke. Txij li cov vaj huam sib luag sandwich yog cov qauv sib txuas nrog cov vaj huam sib luag nyias, kev puas tsuaj rau cov vaj huam sib luag yog feem ntau kho los ntawm kev sib txuas.
Kev kho cov vaj huam sib luag honeycomb siv cov txheej txheem zoo sib xws rau cov khoom siv vaj huam sib luag feem ntau xws li iav fiber, carbon fiber thiab Kevlar®. Kevlar feem ntau yog kho nrog iav fiber. Raws li pom hauv daim duab 54.
Daim duab 54: Hom kev kho ntawm honeycomb sandwich lug
2.1 Kev faib tawm ntawm kev puas tsuaj
Lub sijhawm luv luv - kev kho lub sijhawm tuaj yeem ua tau raws li qhov yuav tsum tau muaj zog tab sis raug txwv los ntawm lub sijhawm lossis lub voj voog davhlau. Thaum kawg ntawm lub neej ntawm kev kho, kev kho yuav tsum tau muab tshem tawm thiab hloov. Kev kho ib ntus tuaj yeem rov ua kom lub zog xav tau ntawm cov khoom siv. Txawm li cas los xij, qhov kev kho no yuav tsis rov qab kho qhov yuav tsum tau ua kom ntev ntawm cov khoom siv. Yog li ntawd, nws muaj qhov sib txawv tshuaj xyuas lub sijhawm lossis txoj hauv kev. Kev kho kom ruaj khov yog ib qho kev kho uas yuav tsum tau muaj zog thiab kav ntev ntawm cov khoom. Txoj kev kho muaj tib txoj kev tshuaj xyuas thiab ntu ntu raws li cov khoom qub.
2.2 Microdamage rau sandwich qauv pawg cores (packing thiab potting kho)
Kev kho encapsulation tuaj yeem siv los kho kev puas tsuaj rau cov vaj huam sib luag honeycomb tsawg dua 0.5 ntiv tes. Cov khoom siv honeycomb tuaj yeem tso rau hauv qhov chaw lossis tshem tawm thiab ntim nrog cov potting compound kom rov qab muaj zog. Kev kho encapsulated tsis rov ua kom tag nrho lub zog ntawm qhov.
Lub potting compound feem ntau yog epoxy ntim cov iav insulating, phenolic lossis yas microspheres, paj rwb, tov khoom lossis lwm yam khoom siv. Lub potting composite kuj tseem siv tau los ua ib qho muab tub lim rau kev kho kom zoo nkauj ntawm cov npoo thiab daim tawv nqaij. Lub potting compound kuj yog siv rau hauv laminated honeycomb panels ua ib qho nyuaj rau bolts thiab screws. Lub potting composite hnyav dua li cov tub ntxhais qub, uas tuaj yeem cuam tshuam rau kev sib npaug ntawm lub davhlau. Qhov hnyav ntawm kev kho yuav tsum tau muab xam thiab muab piv rau lub davhlau tswj qhov hnyav thiab qhov sib npaug ntawm qhov txwv tau teev tseg los ntawm SRM.
2.3 Kev puas tsuaj rau ib los yog ob qho tib si sab vaj huam sib luag yuav tsum tau hloov thiab kho
CEEB TOOM: Cov kauj ruam hauv qab no tsuas yog siv rau kev siv xwb thiab yuav tsum tsis txhob txiav txim siab ncaj qha rau txhua txoj kev kho.
Kauj Ruam 1: Tshawb xyuas kev puas tsuaj
Nyias laminates tuaj yeem kuaj pom qhov muag thiab kuaj xyuas kom pom kev puas tsuaj. Thicker laminates xav tau ntau dua hauv - qhov tob NDI txoj kev xws li kev tshuaj xyuas ultrasonic raws li qhia hauv daim duab 55. Tshawb xyuas dej, roj, roj, av, lossis lwm yam khoom txawv teb chaws nkag mus rau thaj tsam ntawm qhov kev puas tsuaj. Cov dej tuaj yeem kuaj pom nrog x-ray, backlight, lossis lub ntsuas dej noo.
Daim duab 55: Knockout test technique
Kauj Ruam 2: Tshem cov dej los ntawm qhov chaw puas
Dej yuav tsum tau muab tshem tawm los ntawm cov tub ntxhais honeycomb ua ntej qhov yuav kho tau. Raws li pom nyob rau hauv daim duab 56, yog tias cov dej tsis raug tshem tawm, nws yuav boil thaum lub sij hawm kub kho lub voj voog thiab lub vaj huam sib luag yuav nthuav dav cov tub ntxhais, ua rau muaj kev puas tsuaj ntau dua. Cov dej hauv cov tub ntxhais honeycomb tseem tuaj yeem khov ntawm qhov kub qis ntawm qhov siab siab, uas tuaj yeem ua rau cov panels tev tawm.
Daim duab 56: Nqus hnab ntim txoj kev rau ziab qhov chaw
Kauj Ruam 3: Tshem cov kev puas tsuaj
Txiav thaj chaw puas ntawm ib feem mus rau ib qho zoo nkauj nrog cov fab sib npaug, lossis ib puag ncig lossis oval. Tsis txhob ua rau cov khaubncaws sab nraud povtseg, cov cores, lossis cov khoom nyob ib puag ncig. Yog tias cov tub ntxhais tseem raug puas tsuaj, luas cov tub ntxhais mus rau tib lub contour raws li cov tub ntxhais ntawm daim tawv nqaij. Raws li pom hauv daim duab 57.
Daim duab 57: Tshem tawm cov Core puas
Kauj Ruam 4: Presetting thaj chaw puas
Siv lub pob zeb muag muag los yog cov ntaub qhwv ntsej muag rau cov xuab zeb nyob ib ncig ntawm qhov kev puas tsuaj uas tau ntxuav nrog ib qho taper. Qee lub tuam txhab muab qhov sib piv, xws li 1: 40, thaum lwm tus hais txog qhov sib nrug deb, xws li 1-nti sib tshooj ntawm qhov uas twb muaj lawm taper nrug rau txhua txheej. Tshem tawm cov txheej txheem sab nrauv, suav nrog cov txheej txheem hluav taws xob hauv thaj tsam tsawg kawg 1 nti loj dua li tus ciam teb taper. Tshem tawm tag nrho cov xuab zeb thiab plua plav nrog cua compressed qhuav thiab ib lub hoover. Ntxuav thaj chaw puas nrog ib daim ntaub huv uas moistened nrog cov kuab tshuaj tso cai. Raws li pom hauv daim duab 58.
Daim duab 58: Sanding qhov chaw kho
Kauj Ruam 5: Nruab Honeycomb Core (Wet Layer)
Txiav cov tub ntxhais hloov nrog rab riam. Cov tub ntxhais plugs yuav tsum yog tib hom, qib, thiab zoo li cov tub ntxhais qub. Cov hlwb tseem ceeb yuav tsum tau taw qhia tib yam li cov honeycomb ntawm cov khoom nyob ib puag ncig. Plugs yuav tsum tau muab txiav kom ntev li ntev raws li qhov tsim nyog thiab cov kuab tshuaj ntxuav nrog ib qho kev pom zoo.
Rau kev ntub dej nteg- kho kho, txiav ob txheej ntawm cov ntaub npuag tsim nyog rau sab hauv ntawm daim tawv nqaij tsis muaj kev puas tsuaj. Impregnate cov ntaub txheej nrog resin thiab qhov chaw nyob rau hauv lub qhov. Siv infusion compound nyob ib ncig ntawm lub hauv paus thiab muab tso rau hauv lub qhov. Rau kev kho prepreg, txiav ib daim nplaum nplaum kom haum rau lub qhov thiab siv cov nplaum nplaum nyob ib ncig ntawm qhov thaiv. Lub ntsaws yuav tsum kov ob sab ntawm lub qhov. Teem lub core core ntawm blockage nrog cov khoom tseem ceeb primed. Kho thaj chaw nrog lub hnab nqus tsev thiab kho cov tub ntxhais hloov pauv siv qhov cub, autoclave lossis daim pam kub. Kev kho cov ntaub ntub dej tuaj yeem kho tau ntawm chav tsev kub txog 150℉ (65.56 degree). Prepreg kho yuav tsum kho ntawm 250℉ (121 degree) lossis 350℉ (176.67℃). Feem ntau, cov cores hloov pauv tau kho nyob rau hauv ib lub voj voog sib cais es tsis yog co- kho nrog thaj. Tom qab kho, lub blockage yuav tsum tau sanded flush nrog ib puag ncig. Qhov no yog qhia hauv daim duab 59.
Daim duab 59: Hloov Core
Kauj Ruam 6: Npaj thiab Txhim Kho Cov Txheej Txheem
Xa mus rau phau ntawv kho rau cov khoom kho kom raug thiab cov txheej txheem yuav tsum tau kho. Feem ntau, nruab ib txheej ntau dua li kev teeb tsa thawj zaug. Txiav cov txheej thickness kom yog qhov loj thiab kev taw qhia. Kev kho txheej tuab yuav tsum tau muab ntsia rau hauv tib txoj kev raws li cov txheej txheem qub raug kho. Impregnate txheej nrog resin rau ntub nteg- kho kho lossis tshem tawm cov khoom siv rov qab los ntawm prepreg. Cov txheej feem ntau yog nteg siv qhov tsawg kawg nkaus layup thawj taper layup ib ntus. Raws li pom hauv daim duab 60.
Daim duab 60: Patch Installation
Kauj Ruam 7: Nqus hnab ntim cov kev kho
Thaum cov khoom siv paving nyob rau hauv qhov chaw, siv lub tshuab nqus tsev lub tshuab nqus tsev kom tshem tawm cov cua thiab ua kom lub zog kho kom zoo. Saib daim duab 61 rau cov lus qhia kev teeb tsa lub tshuab nqus tsev.
Daim duab 61: Kev kho lub tshuab nqus tsev
Kauj Ruam 8: Kho qhov kho
Kho thaum lub sij hawm kho lub voj voog uas xav tau. Kev kho qhov dej ntub dej tuaj yeem kho tau ntawm chav tsev kub. Qhov kub tuaj yeem nce mus rau 150 ℉ (65.56 degree) kom nrawm kho. Kev kho prepreg yuav tsum tau kho thaum lub sij hawm kho kom siab. Cheebtsam tshem tawm ntawm lub dav hlau mus kho yuav kho tau nyob rau hauv ib chav kub, qhov cub, los yog autoclave raws li qhia nyob rau hauv daim duab 62. Cov pam sov yog siv los kho cov dav hlau.
Tom qab kho cov khoom siv encapsulated thiab tshuaj xyuas qhov kho. Kev kho yuav tsum tsis muaj pits, hlwv, thiab thaj chaw ntawm resin nce lossis poob. Maj mam xuab zeb kho thaj ua rau thaj nrog cov ntawv xuab zeb kom muab qhov chaw du uas yuav tsis ua rau cov fibers. Siv cov kev kho deg thiab txheej txheej conductive (lub teeb yoj resistant).
Daim duab 62: Kho kho
Kauj Ruam 9: Tshaj tawm -Kev Tshawb Fawb Kho
Kev kuaj pom, kais lossis ultrasonic feem ntau yog siv los kuaj xyuas qhov tuab ntawm kev kho. Yog tias pom muaj qhov tsis xws luag, qhov kho qhov kho yuav raug tshem tawm. Qhov no yog qhia hauv daim duab 63.
Daim duab 63: Xyuas tom qab kho
Yog tias lub davhlau tswj vaj huam sib luag tau kho, ua qhov ntsuas qhov sib npaug thiab xyuas kom meej tias lub davhlau tswj vaj huam sib luag tau kho nyob hauv thaj tsam ntawm SRM. Kev ua tsis tau li ntawd yuav ua rau muaj kev sib tham txog kev tsav dav hlau thiab cuam tshuam kev nyab xeeb ntawm lub davhlau.
Yuav tsum tau txuas ntxiv
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