Tau ntau xyoo lawm, kev sib tsoo tau ua tiav cov txheej txheem ua tiav rau cov ntaub ntawv nyuaj tshaj 45 HRC. Cheebtsam xws li cov kabmob sib tw, iav shafts, thiab hydraulic spools yog hauv av kom ua tiav nruj kam rau ua thiab du nto tiav. Txawm li cas los xij, niaj hnub CNC lathes nruab nrog cubic boron nitride tooling tau qhia txog lwm txoj hauv kev: nyuaj tig. Cov txheej txheem no txiav cov hlau hardened thiab lwm yam ntaub ntawv nyuaj yam tsis tas yuav muaj kev sib tsoo tom ntej. Tab sis nyuaj tig tsis yog universal hloov. Kev nkag siab qhov twg nws ua tau zoo tshaj qhov sib tsoo thiab qhov twg nws poob qis yog qhov tseem ceeb rau kev tsim khoom zoo.
Lub zog tig ua haujlwm ntawm lub hauv paus ntsiab lus yooj yim: lub tshuab dhos nruj nrog CBN lossis ceramic ntxig tshem tawm cov khoom siv los ntawm cov khoom siv tawv tawv mus rau 58 HRC lossis siab dua. Cov txheej txheem tuaj yeem ua tiav qhov siab ntawm qhov ntxiv lossis rho tawm 0.0002 ntiv tes thiab qhov chaw tiav mus txog 0.4 microns Ra. Cov txiaj ntsig tseem ceeb yog ceev thiab yoog raws. Lub voj voog tig nyuaj feem ntau ua tiav tsawg dua ib nrab ntawm lub sijhawm sib tsoo vim nws tshem tawm cov khoom ntawm tus nqi siab dua. Kev teeb tsa yog ncaj nraim, thiab tib lub tshuab tuaj yeem ua ntau yam nta xws li lub xub pwg nyom, ntsej muag, thiab undercuts. Tsis zoo li kev sib tsoo, tsis muaj qhov tshwj xeeb coolant lossis log hnav. Rau ntau lub khw, qhov no txhais tau tias tus nqi qis dua thiab tsawg dua lub sijhawm ntawm lub tshuab.
Sib tsoo, ntawm qhov tod tes, tseem yog tus qauv kub rau qhov tseeb thiab qhov tseeb ntawm qhov chaw. Ib qho zoo tuned cylindrical grinder tuaj yeem tuav qhov ntev ntawm qhov ntxiv lossis rho tawm 0.00005 ntiv tes thiab ua tiav daim iav tiav hauv qab 0.1 microns Ra. Kev sib tsoo tseem ua rau qis qis zog, uas yog qhov tseem ceeb rau cov phab ntsa nyias nyias uas ua rau deflection. Cov txheej txheem tsim compressive residual stresses ntawm qhov chaw, feem ntau muaj txiaj ntsig zoo rau lub neej qaug zog. Txawm li cas los xij, kev sib tsoo qeeb qeeb, yuav tsum tau hnav lub log ntau zaus, thiab ua kom muaj cua sov tseem ceeb uas yuav tsum tau tswj nrog lub siab txias txias.
Qhov kev txiav txim siab ntawm qhov nyuaj tig thiab sib tsoo pob khawm ntawm ob peb daim ntawv thov ciam teb. Ib feem geometry yog thawj lim. Hard tig excels nrog yooj yim rotational geometries xws li shafts, rings, thiab disks nrog nruam diameters. Nws tawm tsam nrog kev cuam tshuam, xws li splines lossis keyways, vim tias qhov cuam tshuam quab yuam tuaj yeem tawg ceramic inserts. Kev cuam tshuam nyuaj tig yog ua tau nrog tshwj xeeb tsim wiper inserts tab sis cov cuab yeej lub neej poob qis heev. Kev sib tsoo ua haujlwm cuam tshuam zoo nkauj txij li txhua cov nplej abrasive siv me me txiav.
Txoj cai kam rau ua kos lwm tus ciam teb. Yog tias cov ntawv luam tawm hu rau roundness nyob rau hauv 0.0001 ntiv tes lossis qhov chaw tiav hauv qab 0.2 microns Ra, kev sib tsoo yog qhov kev xaiv zoo dua. Kev hloov nyuaj tuaj yeem ncav cuag cov kev txwv no tab sis cov txheej txheem hloov pauv xws li ntxig hnav, tshuab kub, thiab cov khoom sib xws ua rau muaj kev pheej hmoo ntau dua. Rau kev kam rau siab ntawm 0.0003 ntiv tes los yog coarser, txoj siav nyuaj yog muaj peev xwm thiab feem ntau pheej yig dua.
Batch loj cuam tshuam rau kev txiav nyiaj txiag. Rau siab ntim ntau lawm ntawm qhov zoo tib yam, sib tsoo nrog automated log hnav lub voj voog ua tau zoo heev. Txawm li cas los xij, rau cov khoom me me mus rau nruab nrab ntawm tsib caug mus rau tsib puas daim, nyuaj tig tshem tawm lub sijhawm hnav khaub ncaws thiab tso cai hloov pauv sai. Cov khw muag khoom pom qhov nyuaj tig tshwj xeeb yog qhov txaus nyiam vim tias ib lub tshuab dhos tuaj yeem ua haujlwm ob qho tib si muag thiab tawv tig ntawm tib lub teeb.
Cov khoom siv tseem ceeb. Kev ua haujlwm nyuaj ua haujlwm zoo tshaj plaws ntawm cov hlau uas muaj qhov sib npaug ntawm 50 thiab 65 HRC. Nws tseem ua haujlwm qee cov cuab yeej steel thiab cov ntaub ntawv hardened alloys. Kev sib tsoo ua haujlwm ntawm yuav luag txhua yam khoom siv xws li ceramics, carbides, thiab kub resistant superalloys. Kev hloov nyuaj ntawm cov ntaub ntawv zoo li Inconel 718 lossis Stellite tuaj yeem ua tau tab sis ntxig hnav nrawm nrawm.
Kev txiav txim siab txog kev ncaj ncees ntawm qhov chaw qee zaum yuam kev xaiv. Hard tig ua rau residual tensile stresses ntawm machined nto vim tshav kub thiab yas deformation. Rau kev nyab xeeb cov khoom tseem ceeb xws li cov dav hlau tsaws iav lossis lub cav cav, cov kev ntxhov siab no tuaj yeem txhawb kev pib tawg. Kev sib tsoo tuaj yeem raug kho los tsim kev ntxhov siab, tab sis yog tias ua tsis raug, kev sib tsoo kub tuaj yeem ua rau muaj kev puas tsuaj loj dua. Cov txheej txheem kev soj ntsuam tom qab feem ntau hais txog txoj kev.
Kev tswj cua sov yog lwm qhov ciam teb. Hard tig generates tshav kub feem ntau mus rau hauv lub nti, tawm hauv lub workpiece kuj txias. Sib tsoo, hloov pauv, tso cov cua sov feem ntau rau hauv qhov chaw ua haujlwm, yuav tsum tau ceev faj daim ntawv thov kom tiv thaiv metallurgical puas. Rau cov cua sov rhiab heev Cheebtsam, nyuaj tig muaj qhov zoo dua qub.
Txoj cai siv tau tau tshwm sim los ntawm kev paub hauv khw hauv tsev. Rau qhov yooj yim cylindrical nrog hardness ntawm 50 thiab 62 HRC, kam rau ua ntawm ntxiv los yog rho tawm 0.0003 ntiv tes, thiab batch loj nyob rau hauv tsib puas units, nyuaj tig feem ntau yog siv ntau tshaj li kev sib tsoo. Cov phab ntsa nyias nyob rau hauv 0.1 ntiv tes, cuam tshuam kev txiav, qhov xav tau huab cua puag ncig qis dua 0.00015 ntiv tes, lossis cov ntaub ntawv siab dua 65 HRC txhua qhov taw qhia rov qab rau kev sib tsoo. Cov khw muag khoom zoo tshaj plaws tsis xaiv ib qho txheej txheem nkaus xwb. Lawv khaws ob lub peev xwm thiab siv txhua qhov chaw uas nws lub zog muaj zog. Hard tig yog ib qho kev ua haujlwm siab zoo, tab sis kev sib tsoo tseem tsis tuaj yeem hloov pauv ntawm qhov deb ntawm qhov tseeb. Kev nkag siab txog cov ciam teb no tso cai rau cov tuam txhab lag luam txo cov sij hawm voj voog yam tsis muaj kev txi zoo.
