Ib 、 Feem ntau ua rau cuam tshuam rau casting nto tiav
1. Cov duab ntawm cov khoom siv raw, xws li molding xuab zeb, muab faib ua round, square thiab triangular. Qhov phem tshaj plaws yog daim duab peb sab, tshwj xeeb tshaj yog cov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob yog ib qho yooj yim tsim pores), qhov zoo tshaj plaws yog puag ncig xuab zeb. Yog tias nws yog coal hmoov xuab zeb, cov xuab zeb piv (lub zog thiab av noo ntawm cov xuab zeb) kuj muaj kev cuam tshuam zoo rau cov tsos. Yog tias nws yog carbon dioxide hardened xuab zeb, ces nws tsuas yog nyob ntawm txheej txheej.
2. Khoom siv. Yog hais tias cov tshuaj muaj pes tsawg leeg ntawm cov casting yog imbalanced, xws li tsawg manganese, nws yog ib qho yooj yim los ua xoob thiab cov khoom nto yuav ntxhib.
3. Casting system. Yog tias qhov system casting tsis tsim nyog, nws yuav yooj yim ua rau xoob castings. Hauv qhov xwm txheej hnyav, cov castings yuav tsis raug nchuav, lossis txawm tias ua tiav castings yuav tsis ua.
Ib qho tsis tsim nyog slag tuav system yuav ua rau slag nkag mus rau hauv pwm kab noj hniav thiab tsim slag qhov.
4. Slag ua. Yog hais tias lub slag nyob rau hauv lub molten hlau tsis ntxuav los yog lub slag tsis thaiv thaum lub sij hawm casting, ua rau lub slag khiav mus rau hauv pwm kab noj hniav, slag qhov yuav inevitably tshwm sim.
5. Tus neeg tsim khoom, vim tsis muaj kev saib xyuas, cov xuab zeb tsis huv los yog poob rau hauv lub thawv thaum kaw lub thawv, cov xuab zeb tsis compacted rau hauv cov duab, los yog cov xuab zeb piv tsis tsim nyog, cov xuab zeb lub zog tsis txaus, thiab cov casting yuav tsim trachoma.
6. Tshaj li tus qauv ntawm leej faj thiab phosphorus yuav ua rau tawg ntawm castings. Thaum tsim los yog coj kev tsim khoom, cov no yog cov teeb meem uas yuav tsum tau them sai sai rau txhawm rau xyuas kom zoo ntawm castings.
Cov laj thawj uas tau hais los saum no tsuas yog ib feem me me ntawm lawv. Vim yog qhov hloov pauv thiab muaj txiaj ntsig zoo ntawm kev tsim cov casting, cov teeb meem tshwm sim thaum lub sijhawm tsim khoom feem ntau yuav tshwm sim. Qee zaum muaj teeb meem tshwm sim thiab qhov laj thawj tsis tuaj yeem nrhiav tau ntev.
二. Peb yam tseem ceeb cuam tshuam rau qhov roughness ntawm grey cam khwb cia hlau
Raws li ib qho tseem ceeb ntsuas ntawm qhov zoo ntawm cov hlau cam khwb cia hlau, nto roughness tsis tsuas yog ncaj qha txiav txim lub exquisite tsos ntawm grey cam khwb cia hlau qhov chaw, tab sis kuj muaj kev cuam tshuam zoo rau cov khoom zoo ntawm lub tshuab thiab kev pab cuam lub neej ntawm grey cam khwb cia hlau qhov chaw. . Kab lus no tsom mus rau kev txheeb xyuas yuav ua li cas txhawm rau txhim kho qhov roughness ntawm grey cam khwb cia hlau qhov chaw los ntawm peb yam: cov cuab yeej siv tshuab, cov cuab yeej txiav, thiab txiav tsis.
1. Kev cuam tshuam ntawm cov cuab yeej siv rau ntawm qhov chaw roughness ntawm grey cam khwb cia hlau qhov chaw
Cov yam ntxwv xws li kev ua haujlwm tsis zoo ntawm lub tshuab cuab yeej, qhov tsis zoo ntxaiv qhov tseeb, tsis muaj zog ntawm lub tshuab cuab yeej, thiab qhov sib txawv loj ntawm ntau qhov chaw ntawm lub tshuab cuab yeej yuav cuam tshuam rau qhov roughness ntawm grey cam khwb cia hlau qhov chaw.
Piv txwv li: yog tias qhov tseeb ntawm lub tshuab cuab yeej spindle yog 0.002mm, uas yog 2 micron runout, ces nws yog theoretically tsis yooj yim sua rau tshuab ib lub workpiece nrog ib tug roughness qis dua 0.002mm. Feem ntau, cov khoom ua haujlwm nrog qhov roughness ntawm Ra1.0 zoo. Txheej txheem nws tawm. Ntxiv mus, grey cam khwb cia hlau nws tus kheej yog ib qho casting, yog li nws tsis tuaj yeem ua tiav nrog qhov siab roughness yooj yim li steel qhov chaw. Tsis tas li ntawd, cov xwm txheej ntawm lub tshuab cuab yeej nws tus kheej tsis zoo, ua rau nws nyuaj dua los xyuas kom meej qhov roughness.
Lub rigidity ntawm lub tshuab cuab yeej feem ntau yog teem rau ntawm lub Hoobkas thiab tsis tuaj yeem hloov kho. Ntxiv rau qhov rigidity ntawm lub tshuab cuab yeej, qhov spindle clearance kuj tuaj yeem hloov kho, qhov tseeb ntawm cov kabmob tuaj yeem txhim kho, thiab lwm yam kom lub tshuab cuab yeej tshem tawm me me, yog li tau txais qhov siab dua qhov roughness thaum ua cov khoom siv grey cam khwb cia hlau. degree yog guaranteed rau ib qho twg.
2.Effect ntawm cov cuab yeej txiav rau saum npoo roughness ntawm grey cam khwb cia hlau qhov chaw
Cov cuab yeej xaiv cov khoom siv
Thaum cov affinity ntawm cov hlau molecules ntawm cov cuab yeej cuab tam thiab cov khoom yuav tsum tau ua tiav yog siab, cov khoom yuav tsum tau ua tiav yog ib qho yooj yim rau kev sib raug zoo nrog lub cuab tam los tsim tsa-up ntug thiab scaly. Yog li ntawd, yog hais tias lub adhesion yog loj los yog kev sib txhuam yog loj, lub nto roughness yuav loj, thiab vice versa. . Thaum ua cov khoom grey cam khwb cia hlau, nws yog qhov nyuaj rau carbide inserts kom ncav cuag qhov roughness ntawm Ra1.6. Txawm hais tias nws tuaj yeem ua tiav, nws lub cuab yeej lub neej yuav raug txo kom tsawg. Txawm li cas los xij, CBN cov cuab yeej ua los ntawm BNK30 muaj kev sib txhuam coefficient ntawm cov cuab yeej thiab cov khoom siv hluav taws xob zoo heev. Kev ruaj ntseg thiab hnav tsis kam, qhov roughness ntawm Ra1.6 tuaj yeem ua tau yooj yim ntawm kev txiav ceev ntau zaus ntau dua li ntawm carbide. Nyob rau tib lub sijhawm, lub cuab yeej lub neej yog kaum ob lub sijhawm ntawm cov cuab yeej carbide, thiab qhov ci ntsa iab ntawm qhov chaw zoo tuaj ntawm ib qho Magnitude.
Xaiv cov cuab yeej geometry parameter
Ntawm cov cuab yeej geometric tsis muaj qhov cuam tshuam ntau dua ntawm qhov roughness yog lub ntsiab declination lub kaum sab xis Kr, lub kaum sab xis ntawm lub kaum sab xis Kr' thiab cov cuab yeej taw qhia arc radius re. Thaum lub ntsiab thiab theem nrab declination cov ces kaum me me, qhov siab ntawm qhov seem seem ntawm cov txheej txheem nto kuj me me, yog li txo qhov roughness ntawm qhov chaw; qhov me dua lub kaum sab xis ntawm lub kaum sab xis, qhov qis ntawm qhov roughness, tab sis txo qis lub kaum sab xis ntawm lub kaum sab xis yuav yooj yim ua rau kev co, yog li qhov kev txo qis ntawm lub kaum sab xis deflection yuav tsum tau txiav txim siab raws li qhov rigidity ntawm lub tshuab cuab yeej. Kev cuam tshuam ntawm cov cuab yeej ntiv taw arc vojvoog rov rau ntawm qhov chaw roughness: Thaum rov nce ntxiv thaum lub zog tso cai, qhov roughness yuav txo qis. Kev nce re yog ib txoj hauv kev zoo los txo qhov roughness. Yog li ntawd, txo lub ntsiab declination lub kaum sab xis Kr, lub thib ob declination lub kaum sab xis Kr' thiab ua rau cov cuab yeej taub hau arc vojvoog r tuaj yeem txo qhov siab ntawm thaj chaw seem, yog li txo qhov roughness ntawm qhov chaw.
Cov kws tsim khoom siv tau hais tias, "Nws raug nquahu kom xaiv lub kaum sab xis ntawm lub cuab yeej taw qhia raws li qhov yuav tsum tau ua kom nruj thiab roughness ntawm cov khoom ua haujlwm. Yog tias qhov rigidity zoo, sim xaiv lub kaum sab xis loj dua, uas yuav tsis tsuas yog txhim kho kev ua tau zoo, tab sis kuj txhim kho qhov chaw tiav. "Tab sis thaum tho txawv los yog txiav cov shafts slender los yog nyias-walled qhov chaw, ib tug me me lub taub hau arc vojvoog feem ntau siv vim tsis zoo system rigidity."
Cov cuab yeej hnav
Kev hnav ntawm cov cuab yeej txiav tau muab faib ua peb theem: thawj coj, hnav ib txwm thiab hnav hnyav. Thaum lub cuab yeej nkag mus rau theem hnyav hnyav, lub cuab yeej flank hnav tus nqi nce siab, lub kaw lus zoo li tsis ruaj khov, kev vibration nce, thiab qhov hloov pauv ntawm qhov roughness kuj nce sharply.
Hauv thaj tsam ntawm grey cam khwb cia hlau, ntau qhov chaw yog tsim nyob rau hauv batch, uas yuav tsum tau cov khoom zoo sib xws thiab ntau lawm efficiency. Yog li ntawd, ntau lub tuam txhab machining xaiv hloov cov cuab yeej yam tsis tau tos cov cuab yeej mus txog rau theem peb ntawm kev hnav hnyav, uas tseem hu ua yuav tsum tau ua. Thaum hloov cov cuab yeej, cov tuam txhab machining yuav rov sim cov cuab yeej los txiav txim siab qhov tseem ceeb, uas tuaj yeem ua kom lub ntsej muag roughness yuav tsum tau thiab qhov tseeb qhov tseeb ntawm grey cam khwb cia hlau tsis cuam tshuam rau tag nrho cov kev ua tau zoo.
3.Qhov cuam tshuam ntawm kev txiav ntawm qhov roughness ntawm grey cam khwb cia hlau qhov chaw.
Cov kev xaiv sib txawv ntawm kev txiav tsis muaj kev cuam tshuam ntau dua rau ntawm qhov chaw roughness thiab yuav tsum tau them nyiaj txaus rau. Kev ua tiav yog txheej txheem tseem ceeb los xyuas kom meej qhov roughness ntawm grey cam khwb cia hlau qhov chaw. Yog li ntawd, thaum lub sij hawm tiav, txiav tsis yuav tsum tau tsuas yog los xyuas kom meej lub nto roughness ntawm grey cam khwb cia hlau qhov chaw, coj mus rau hauv tus account productivity thiab tsim nyog lub cuab tam lub neej. Qhov tob ntawm kev ua tiav yog txiav txim siab los ntawm cov npoo sab laug tom qab kev ua haujlwm ntxhib raws li kev ua haujlwm raug thiab qhov xav tau ntawm qhov roughness. Feem ntau, txiav qhov tob yog tswj tsis pub dhau 0.5 hli. Nyob rau tib lub sijhawm, ntev npaum li qhov kev nruj ntawm lub tshuab cuab yeej tso cai, kev ua haujlwm ntawm cov cuab yeej tuaj yeem siv tag nrho thiab kev txiav ceev tuaj yeem siv rau high-speed machining ntawm grey cam khwb cia hlau qhov chaw.
4. Kev cuam tshuam ntawm lwm yam ntawm qhov chaw roughness ntawm grey cam khwb cia hlau qhov chaw
Piv txwv li, grey cam khwb cia hlau qhov lawv tus kheej muaj qee qhov tsis xws luag, tsis tsim nyog txiav cov kua dej, thiab cov txheej txheem sib txawv yuav cuam tshuam qhov roughness ntawm grey cam khwb cia hlau qhov chaw.
Cov kws tshaj lij cov cuab yeej tau hais tias, "Ntxiv rau peb yam tseem ceeb ntawm cov cuab yeej siv tshuab, cov cuab yeej txiav, thiab cov khoom txiav, yam xws li txiav cov kua, grey cam khwb cia hlau qhov chaw lawv tus kheej, thiab cov txheej txheem ua haujlwm kuj muaj qee yam cuam tshuam rau qhov roughness ntawm grey. cam khwb cia hlau qhov chaw, xws li tig, milling, Thaum tho txawv grey cam khwb cia hlau qhov chaw, CBN cov cuab yeej tseem tuaj yeem tshuab qhov roughness ntawm Ra0.8 yog tias lub tshuab cuab yeej, txiav tsis thiab lwm yam tso cai, tab sis nws yuav muaj kev cuam tshuam rau lub cuab yeej lub neej. Cov kev qhia tshwj xeeb yuav tsum tau txiav txim raws li kev ua haujlwm tiag tiag. ".
5. Cov ntsiab lus
Raws li qhov tseeb tias qhov roughness ntawm qhov chaw muaj qhov cuam tshuam ncaj qha rau kev ua haujlwm ntawm lub tshuab qhov chaw, thiab cov yam ntxwv uas cuam tshuam rau qhov roughness ntawm qhov tseeb yog los ntawm ntau yam, nws yog ib qho tsim nyog yuav tsum tau ua txhua yam rau hauv kev txiav txim siab thiab ua kom muaj kev lag luam ntau dua rau saum npoo. roughness raws li qhov yuav tsum tau muaj.
三, Yuav ua li cas txhawm rau txhim kho qhov chaw tiav ntawm castings (cov ntaub ntawv hlau hlau)
Sandblasting
Craftsmanship:
Ntxuav nrog roj av (120 #) thiab tshuab qhuav nrog compressed cua → Xuab zeb blasting → tshuab cov xuab zeb nrog compressed cua → Nruab thiab dai → Tsis muaj zog corrosion → Yaug nrog dej txias → Electro-galvanize los yog tawv chrome.
Cov txheej txheem corrosion tsis muaj zog: w (sulfuric acid) = 5% ~ 10%, chav sov, 5 ~ 10s.
Etching thiab scrubbing txoj kev
Thaum lub workpiece tsis raug tso cai rau sandblasted vim tshwj xeeb yuav tsum tau rau qhov tseeb los yog nto tiav, tsuas yog etching thiab txhuam txoj kev yuav siv tau los ntxuav lub nto.
kauj ruam:
① Roj av txhuam (120 #). Thaum siv cov khoom siv roj av lossis cov roj av qias neeg, ntxuav lawv dua nrog cov roj av huv 120#.
② Tshuab ziab nrog cua compressed.
③ Kev puas tsuaj. w (hydrochloric acid) = 15%, w (hydrofluoric acid) = 5%, chav sov, kom txog rau thaum cov xeb tshem tawm. Yog tias muaj xeb ntau dhau thiab cov nplai oxide tuab dhau lawm, nws yuav tsum tau muab khawb tawm ua ntej. Lub sij hawm etching yuav tsum tsis txhob ntev dhau, txwv tsis pub nws yuav yooj yim ua rau hydrogenation ntawm lub substrate thiab nthuav tawm cov pa roj carbon ntau dhau ntawm qhov chaw, ua rau ib nrab lossis ua tiav tsis ua tiav rau txheej txheej.
④ Txhuam nrog cov kua qaub slurry tuaj yeem nthuav tawm cov iav siv lead ua rau ntawm qhov chaw ua haujlwm thiab tau txais cov txheej txheem nrog kev sib txuas zoo.
⑤ Yaug thiab so. Tshem cov txiv qaub adhering rau saum npoo.
⑥ Kev teeb tsa thiab dai. Cam khwb cia hlau qhov chaw muaj hluav taws xob tsis zoo, yog li lawv yuav tsum nyob ruaj khov thaum ntsia thiab dai. Yuav tsum muaj cov ntsiab lus sib txuas ntau li ntau tau. Qhov kev ncua deb ntawm workpieces yuav tsum yog me ntsis 0.3 npaug loj dua li ntawm electroplated qhov chaw ua los ntawm lwm yam ntaub ntawv.
⑦ Kev ua haujlwm. Lub hom phiaj ntawm kev ua kom yog tshem tawm cov oxide zaj duab xis tsim thaum lub sij hawm txhuam, mounting thiab lwm yam txheej txheem. Cov qauv thiab txheej txheem txheej txheem: w (sulfuric acid) = 5% ~ 10%, w (hydrofluoric acid) = 5% ~ 7%, chav sov, 5 ~ 10s.
⑧ Yaug nrog dej ntws.
⑨ Electro-zinc plating lossis nyuaj chromium.
Post lub sij hawm: May-26-2024
