Tsom ntsoov rau kev daws teeb meem ntawm high-precision machining ntawm lub qhov hauv qab kawg lub ntsej muag ntawm lub qhov kaw lub qhov nyob rau hauv lub aviation valve lub cev, peb tau ua tiav kev tshawb fawb ywj pheej thiab tau txais ib lub cav sib tsoo kawg lub ntsej muag nrog adjustable / stabilized siab, precision qhia khub, spherical haum, thiab kis tau tus mob thiab positioning yuam kev them nyiaj. (ZL201820823098.4) Cov txheej txheem tshiab thev naus laus zis tau ua tiav cov txheej txheem kev teeb meem xws li flatness, deg roughness, thiab verticality raws li cov axis ntawm cov lus qhia lub qhov uas yuav tsum tau siab precision rau hauv qab kawg lub ntsej muag ntawm lub qhov tob, thiab nthuav lub siab. -precision hauv qab kawg lub ntsej muag ntawm qhov sib sib zog nqus qhov. Kev siv thev naus laus zis muaj qhov zoo ntawm qhov muaj zog fixture practicability thiab kev ua haujlwm siab.
1 Cov lus qhia
Ib yam khoom servo valve yog tsim los nrog cov qauv tshwj xeeb. Ib feem ntawm lub valve yog ntsia rau hauv φ15H7 94mm qhov tob hauv lub valve lub cev. Lub valve sab nraud txoj kab uas hla thiab lub valve lub puab txoj kab uas hla yog txuas nrog ib tug zawv zawg valve coupling foob (saib daim duab 1). Thaum lub valve qhov chaw raug yuam kom txav mus rau ntau txoj haujlwm, cov roj hluav taws xob hloov pauv tau pom tau [1]. Thaum ib txwm kaw, lub dav hlau hauv qab ntawm lub qhov valve tseem yog qhov chaw sib khi. Nws flatness, nto roughness, thiab perpendicularity rau lub qhov axis yog siab li IT7 thiab siab dua. Nws cov qauv hauv qab thiab cov yam ntxwv muaj nuj nqis tau pom hauv daim duab 2. qhia.
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a) Txoj haujlwm ntawm lub valve txuas qhov B thiab C thaum qhib
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b) Txoj hauj lwm ntawm lub valve txuas qhov A thiab B thaum ib txwm kaw
Daim duab 1 Schematic daim duab ntawm swb valve coupling foob
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Daim duab 2 Schematic daim duab ntawm lub hauv qab kawg lub ntsej muag ntawm lub qhov valve thiab cov qauv ntawm lub qhov valve
Yog tias qhov kev ua tau zoo no tau ua tiav, lub qhov tob hauv qab kawg ntawm qhov sib tsoo cov cuab yeej nrog cov lus qhia meej, tsis tshua muaj zog quab yuam, thiab kev tswj xyuas ruaj khov yuav tsum tau tsim los ntawm kev sib tsoo lub dav hlau kom ua tiav qhov kev ua haujlwm ntawm lub qhov hauv qab kawg. Vim yog kev thaiv kev thaiv los ntawm txawv teb chaws aviation technology nyob rau hauv peb lub teb chaws, nws yog tsis yooj yim sua kom tau txais kev sib tsoo technology. Nyob rau hauv cov cuab yeej uas twb muaj lawm, rau kev sib tsoo lub dav hlau hauv qab ntawm lub qhov, sib nqus abrasive sib tsoo tshuab feem ntau yog siv [2], uas muaj qhov zoo hauv kev ua tiav ntawm cov txheej txheem nkhaus. , tus nqi deg roughness txo qis thiab qhov ua tau zoo dua, tab sis lub peev xwm los hloov lossis txhim kho qhov tseeb ntawm geometric xws li qhov flatness ntawm lub dav hlau hauv av tsis zoo, yog li qhov versatility tsis zoo. Hauv kev kos duab ua ntej, tseem muaj ib txoj hauv kev sib tsoo lub dav hlau hauv qab kawg ntawm lub qhov los ntawm kev siv tus pas nrig sib tsoo nrog lub dav hlau kawg. Piv txwv li, CN201361804Y patent daim ntawv nthuav tawm lub qhov tob hauv qab sib tsoo cov cuab yeej rau CNC tho txawv thiab milling tshuab. Txawm li cas los xij, qhov kev sib tsoo no tseem tsis tau siv. Nws tuaj yeem coj mus rau hauv tus account qhov kev xav tau ntawm qhov kawg ntawm qhov kawg yuav tsum yog hauv av thiab axis ntawm qhov siv qhov. Hauv cov txheej txheem kev ua haujlwm tiag tiag, thaum sib tsoo lub dav hlau hauv qab kawg ntawm qhov nrog qhov sib txawv qhov tob, nws yog qhov yuav tsum tau rub tawm lub cotter tus pin thiab tom qab ntawd cais cov pas nrig sib tsoo los ntawm kev sib kis. Tsuas yog tom qab ntawd tuaj yeem sib tsoo pas nrig hloov nrog qhov sib txuas ntev. Nyob rau tib lub sijhawm, kev ua tiav qhov sib sib zog nqus thiab cov qauv slotted yog cumbersome, muaj kev ua haujlwm tsawg hauv cov txheej txheem tsim khoom tiag tiag, thiab tsis yooj yim rau nruab [3].
Kev sib tsoo tivthaiv (patent naj npawb ZL201820823098.4) ntawm nws tus kheej tsim los ntawm qhov kev ua tiav thev naus laus zis tuaj yeem tsis tsuas yog coj mus rau hauv tus account qhov kev xav tau zoo xws li flatness, nto roughness thiab perpendicularity txheeb ze rau qhov siv qhov axis ntawm lub hauv qab kawg ntawm lub qhov, tab sis kuj tuaj yeem ua tau. siv rau qhov sib tsoo ntawm qhov sib txawv qhov tob. , nws tuaj yeem nres ncaj qha thiab cov sib tsoo sib tsoo tuaj yeem raug tshem tawm thiab hloov. Kev ua haujlwm yog yooj yim dua thiab tuaj yeem txhim kho qhov kev sib tsoo.
Tag nrho cov thev naus laus zis tseem ceeb uas twb muaj lawm tau raug daws, thiab ntau yam kev ntsuas tsis tau tsuas yog ua tau raws li cov qauv tsim, tab sis kuj mus txog qib siab hauv tsev. Qhov kev ua tiav thev naus laus zis no tau ua tiav kev txhawb nqa thiab siv rau hauv kev tsim cov khoom siv lub cev valve rau servo valve cov khoom txhawb nqa ntau yam ntawm lub teb chaws tseem ceeb aircraft qauv, ua kom muaj txiaj ntsig zoo ntawm kev lag luam thiab pab txhawb kev loj hlob ntawm kuv lub teb chaws kev lag luam aviation.
2 Tshawb nrhiav tswv yim
2.1 Kev txheeb xyuas cov txheej txheem nyuaj
Rau kev sib sib zog nqus qhov, kev ua hauv qab tiaj yog ib txwm ua nyuaj. Tshwj xeeb tshaj yog rau lub qhov valve hauv qhov project no, qhov sib piv ntawm qhov tob rau lub qhov taub tshaj 6: 1, uas belongs rau qhov sib sib zog nqus qhov. Vim tsis zoo lub cuab yeej rigidity thiab hnyav lub cuab yeej vibration thiab deflection, nws yog ib qho nyuaj rau cov tsoos tig thiab tho txawv txheej txheem ib txhij kom lub nto roughness, flatness thiab perpendicularity rau cov ntaub ntawv qhov nyob rau hauv qab ntawm high-precision sib sib zog nqus qhov. Kev sib tsoo thiab polishing tshuab uas twb muaj lawm tsis tuaj yeem coj mus rau hauv tus account peb qhov tseem ceeb ntawm qhov project no, yog li nws yog ib qho tsim nyog yuav tsum tau ua cov kev tshawb fawb txog kev sib tsoo ntawm lub qhov hauv qab kawg ntawm qhov sib tsoo.
Tsis tas li ntawd, cov yam ntxwv tseem ceeb ntawm qhov project no, qhov flatness ntawm lub hauv qab kawg ntawm lub ntsej muag ntawm lub qhov {{0}}}.01mm thiab perpendicularity ntawm lub hauv qab kawg lub ntsej muag ntawm lub qhov thiab lub axis ntawm lub valve txuam lub qhov. 0.03mm, tuaj yeem tshawb pom ncaj qha los ntawm kev sib koom ua peb-dimensional, tab sis tus nqi deg roughness ntawm lub ntsej muag hauv qab kawg ntawm lub qhov Ra=0.1μm, vim lub qhov tob tob thiab qhov ntsuas qhov roughness tsis tuaj yeem ua kom pom ncaj qha. , yog li yuav tsum tau nrhiav ib txoj kev ntsuas tsis ncaj ncaj.
2.2 General tswv yim
1) Lub φ15H7 lub qhov yog txuam nrog lub micro-clearance valve, siv tag nrho cov precision coupling sub-processing technology los tsim ib tug precision qhia ncej thiab qhia bushing tooling kom tau raws li high-precision verticality thiab lwm yam yuav tsum tau. Tom qab ntawd, peb kos cov thev naus laus zis tam sim no thiab dav hlau sib tsoo cov ntsiab lus thiab kev paub dhau los txhawm rau txhim kho lub siab / ruaj khov quab yuam yog siv, thiab cov txheej txheem tsim xws li pob sib txuas sib txuas thiab qhov yuam kev tsis kawg yog saws [4] kom ua tiav qhov tseeb machining hauv qab kawg. ntsej muag ntawm lub qhov.
2) Kev sib tsoo yog txheej txheem tiav, tsim nyog rau kev ua haujlwm nrog me me micro-machining nyiaj pub dawb, thiab kev puas tsuaj rau tus kheej ntawm cov cuab yeej sib tsoo yog qhov hnyav. Txhawm rau txhim kho kev tsim khoom, nws yog qhov tsim nyog los tsim cov txheej txheem tshiab rau kev ua haujlwm hauv qab ntawm lub qhov ua ntej sib tsoo.
3) Raws li qhov teeb meem nyuaj ntawm kev ntsuas qhov nto roughness tus nqi Ra=0.1μm ntawm qhov chaw hauv qab ntawm lub qhov, cov txheej txheem ntawm kev tshuaj xyuas thawj zaug yog siv los daws qhov teeb meem.
Yog li ntawd, tus yuam sij rau txoj kev vam meej ntawm txoj haujlwm no yog nyob rau hauv kev tsim cov cuab yeej sib tsoo cov txheej txheem, uas yuav tsum tau ua tiav ib txhij ua kom tau raws li qhov yuav tsum tau ua rau saum npoo roughness, flatness thiab verticality, thiab ua tau raws li qhov yuav tsum tau ua rau ntawm qhov chaw tsim khoom.
2.3 Kev daws teeb meem
(1) Kev loj hlob ntawm cov cuab yeej sib tsoo: Muaj kev ywj pheej tsim ib hom tshiab ntawm lub tshuab lub qhov hauv qab kawg ntawm qhov sib tsoo. Txhawm rau kom ua tiav kev sib tsoo zoo thiab ua haujlwm zoo ntawm lub qhov hauv qab kawg ntawm qhov chaw thiab ua tau raws li qhov xav tau kawg ntawm cov khoom, qhov tseem ceeb tshaj plaws yog lub qhov hauv qab kawg ntawm qhov sib tsoo. Cov cuab yeej sib tsoo yuav tsum coj mus rau hauv tus account lub flatness thiab nto roughness ntawm lub hauv qab kawg lub ntsej muag ntawm lub qhov, raws li zoo raws li cov verticality yuav tsum tau txheeb ze rau lub axis ntawm lub reference qhov, thiab siv high-precision txuam qhov raws li cov lus qhia. Txhawm rau kom ntseeg tau qhov kev xav tau zoo no, pab pawg ua haujlwm ntawm nws tus kheej tsim cov cuab yeej sib tsoo (sib xyaw ZL201820823098 .4).
Sib tsoo lub dav hlau nyob rau hauv qab ntawm lub qhov yog tsis tsuas yog kom tau ib tug me me nto roughness tus nqi, tab sis tseem ceeb tshaj, kom tau ib tug ntau dua dav hlau raug [5]. Qhov me me qhov kev ua yuam kev flatness, qhov zoo dua, thiab nws yog ib qho tsim nyog los txo qhov kev sib tsoo (tseem ceeb) kev ua haujlwm Kev cia siab rau cov neeg ua haujlwm txawj ntse thaum lub sijhawm ua haujlwm yuav txo qis kev siv zog thiab yog li txhim kho kev sib tsoo.
(2) Cov qauv ntawm cov cuab yeej sib tsoo: Cov cuab yeej tsim thiab tsim khoom sib tsoo yog lub cev muaj zog hauv qab kawg ntawm cov khoom sib tsoo (saib daim duab 3), uas muab lub zog txhim khu kev qha nrog kev pab los ntawm kev hloov ceev nrawm thiab qhov siab txwv qhov siab (xws li kev sib koom tes tho txawv. tshuab thiab lwm yam khoom siv). Cov cuab yeej sib tsoo muaj 4 qhov chaw: lub tshuab hluav taws xob tswj hluav taws xob / ruaj khov, lub pob taub hau pab kis tau tus mob, ib qho kev qhia khub thiab cov pas nrig sib tsoo. Voltage regulating / stabilizing mechanism, controllable caij nplooj ntoos hlav compression kom stabilize lub zog ntawm kev sib tsoo nto. Lub pob taub hau pab kis tau tus mob mechanism pab txhawb kev lag luam clutch. Kev ua haujlwm ntawm lub taub hau pob yog txhawm rau kho thiab them nyiaj rau qhov kev ua yuam kev ntawm qhov kawg ntawm qhov sib tsoo pas nrig thiab cov spindle axis thaum nws raug teeb tsa, xyuas kom meej tias qhov ua haujlwm kawg ntawm cov pas nrig sib tsoo thiab qhov kawg ntawm qhov chaw yuav tsum yog hauv av. nyob rau hauv txhim khu kev qha haum. Qhov no yog qhov tseem ceeb Cov txheej txheej ncig ntawm tus pin yog tsim los kom qis dua qhov nruab nrab ntawm lub pob taub hau. Cov ntawv qhia khub yog tsim nyog rau kev taw qhia thaum sib tsoo hauv qab ntawm qhov sib sib zog nqus kom paub meej qhov kev xav tau ntawm qhov nruab nrab ntawm qhov kawg ntawm qhov yuav tsum tau ua hauv av thiab lub qhov siv. Thaum tsim lub qhov dej ntiav hauv qab kawg ntawm qhov kawg ntawm qhov sib tsoo, tsis tas yuav tsim cov lus qhia, thiab lub taub hau pob tuaj yeem raug txiav ncaj nraim kom qhov chaw ua haujlwm kawg ntawm cov pas nrig sib tsoo haum rau qhov kawg ntawm qhov av. Kev sib tsoo pas nrig nws tus kheej yuav tsum muaj kev tsim khoom siab. Piv txwv li, lub flatness ntawm kev sib tsoo kawg lub ntsej muag thiab lub perpendicularity ntawm kev sib tsoo kawg lub ntsej muag txheeb ze rau kev sib hloov siv axis yuav tsum tau mus txog qib micron. Nyob rau tib lub sijhawm, cov hlab ntsha loj ntawm kev sib tsoo pas nrig kawg lub ntsej muag cuam tshuam rau kev sib tsoo zoo thiab kev ua haujlwm zoo. Nws kuj loj heev. Kev tsim qauv ntawm "zoo" grooves (groove dav 0.25mm, qhov tob 0.5 ~ 1mm, spacing 1mm thiab uniformly faib) tau los ntawm kev sim ua pov thawj muaj txiaj ntsig ntawm kev txhim kho zoo thiab kev ua haujlwm zoo thaum sib tsoo lub ntsej muag hauv qab kawg ntawm φ15H7 qhov nrog qhov tob ntawm 94mm. Zoo dua (saib daim duab 4 thiab daim duab 5).
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Daim duab 3 Cov qauv ntawm cov khoom sib tsoo
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Daim duab 4 Cov leeg ntawm qhov kawg ntawm qhov sib tsoo pas nrig
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Daim duab 5 Kev sib piv cov txiaj ntsig ntawm kev sib tsoo
Cov kev xav tau ntau lawm rau cov cuab yeej no kuj yog siab heev. Thaum lub sij hawm kev tsim kho, cov khoom sib txuas nrog qhov sib txawv ntawm {{0}}}004 mus rau 0.006 hli yuav tsum tau honed / sib tsoo los ua cov txheej txheem sab hauv, thiab tsis muaj kev sib tsoo / cylindrical sib tsoo los ua cov txheej txheem lub cylindrical precision clearance kom tau raws li qhov chaw thiab kev ua haujlwm. Rau kev sib dhos nrog qhov sib txawv ntawm qhov yuav tsum tau ua ntawm 0.03mm, cov txheej txheem ua haujlwm xws li reaming / tig tau txais los ua kom tau raws li qhov yuav tsum tau ua los ua ke (saib daim duab 6).
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Daim duab 6 Cov khaub ncaws ua haujlwm tiag tiag
Cov kauj ruam siv tau rau kev siv cuab yeej yog raws li hauv qab no.
1) Txiav txim siab lub caij nplooj ntoos hlav compression raws li lub elastic quab yuam ntawm lub caij nplooj ntoos hlav (saib daim duab 7), kos ib txoj kab cim rau sab nrauv ntawm tus pas nrig qhia (ib lub cim liab yuav txaus), thiab ua ntej nruj lub jackscrew los kho nws.
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Daim duab 7 Spring compression tus nqi
2) Lub tshuab cuab yeej chuck tuav lub voltage regulating / stabilizing mechanism, raws li qhia nyob rau hauv daim duab 8.
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Daim duab 8 Tooling test
3) Muab qhov chaw kom raug los yog kho nrog lub fixture kom qhov chaw yuav tsum nyob rau hauv ib tug kab rov tav lub xeev.
4) Kho lub tshuab cuab yeej lossis qhov chaw kom lub concave spherical nto ntawm tus taw qhia pas nrig haum lub convex spherical nto ntawm tus pas nrig sib tsoo, thiab xyuas seb lub installation puas nyob rau hauv qhov chaw los ntawm loosening lub jack ntsia hlau.
5) Siv ib lub thickness ntawm abrasive muab tshuaj txhuam rau ntawm qhov kawg ntawm qhov sib tsoo ntawm tus pas nrig sib tsoo, tso tus pas nrig sib tsoo rau hauv qhov sib thooj, thiab manually paub tseeb tias lub installation yog nyob rau hauv qhov chaw.
6) Ntxig tus pin pas nrig rau hauv lub qhov sib thooj rau lub pob taub hau ntawm cov pas nrig sib tsoo, kom qhov ntev ntawm ob qhov kawg ntawm tus pin pas nrig yog kwv yees li sib npaug, thiab manually paub tseeb tias qhov kev sib txuas yog txhim khu kev qha.
7) Teem lub tshuab cuab yeej tsis, pib lub tshuab cuab yeej rau kev sib tsoo, thiab nres tom qab sib tsoo rau ib lub sijhawm.
Nkag mus rau lub voj voog ua haujlwm tom ntej kom txog thaum qhov zoo ntawm cov av kawg saum npoo yog tsim nyog. Nws yuav tsum raug sau tseg tias thaum tshem tawm cov pas nrig sib tsoo tom qab txhua lub voj voog sib tsoo, cov ntawv xuab zeb yuav tsum tau siv los ntxuav cov burrs ib puag ncig.
Cov cuab yeej no ua tau raws li cov kev xav tau ntawm kev sib tsoo thiab ruaj khov. Nws tsis tsuas yog ua kom muaj qhov zoo ntawm qhov sib tsoo kom tau raws li cov qauv tsim kom zoo, tab sis kuj tseem txhim kho kev sib tsoo ntawm ntau dua 5 zaug piv nrog cov tsoos phau ntawv sib tsoo. Tshwj xeeb, cov txheej txheem kev txawj ntse ntawm tus neeg teb xov tooj raug txo qis heev, thiab tsis tas yuav tsim cov kws tshaj lij thiab cov neeg ua haujlwm nrog cov qib kev txawj ntse saum toj no los ua haujlwm (nws yog qhov txaus kom muaj peev xwm ua tau cov cuab yeej siv tau) txo qis kev siv zog ntawm cov neeg ua haujlwm.
Daim duab 9 qhia txog kev sib tsoo, thiab qhov tsis pom kev tau txais los ntawm ntau qhov kev sim. Kev paub cov ntaub ntawv rau φ15mm sib tsoo nto 1: spindle ceev 60r/min, caij nplooj ntoos hlav elasticity 4.6N·mm, txheej W5 sib tsoo paste zaj duab xis thickness txog 0.2mm, sib tsoo ntev 15s/time. Kev paub cov ntaub ntawv rau φ15mm sib tsoo nto 2: spindle ceev 60r / min, caij nplooj ntoos hlav elastic quab yuam 4.6N·mm, txheej M5 sib tsoo paste zaj duab xis thickness txog 0.4mm, sib tsoo ntev 2.5s / sijhawm. Nws yuav tsum raug sau tseg tias txawm siv txoj kev twg los xij, muaj kev pheej hmoo ntawm kev sib tsoo khawb yog tias lub sijhawm siv sijhawm ntev dhau. Kev sib tsoo yuav tsum tau hloov nyob rau lub sijhawm thiab lub voj voog ua haujlwm yuav tsum tau ua kom txog thaum cov khoom tsim nyog.
