Tej zaum cov neeg yuav khoom ntawm cov tshuab sib tsoo tshiab yuav tsum nkag siab qhov ins thiab outs ntawm cov txheej txheem abrasive, yuav ua li cas cov abrasive daim ntawv cog lus ua haujlwm, thiab ntau hom kev sib tsoo log hnav.
Cov ntawv tshaj tawm blog no tau hloov kho los ntawm ib tsab xov xwm luam tawm los ntawm Barry Rogers nyob rau lub Kaum Ib Hlis 2018 qhov teeb meem ntawm Tshuab / Khw ntxiv ntawm Modern Machine Shop magazine.
Nyob rau hauv tsab xov xwm kawg ntawm lub ncauj lus ntawm grinders, peb tau tham txog qhov yooj yim thov ntawm grinders thiab yuav ua li cas lawv tsim.Tam sim no, peb ua tib zoo saib seb cov txheej txheem abrasive ua haujlwm li cas thiab nws txhais li cas rau cov khw muag khoom ntawm cov tshuab tshiab ntawm lub khw.
Sib tsoo yog ib qho kev siv tshuab abrasive uas siv lub log sib tsoo ua cov cuab yeej txiav.Lub log sib tsoo muaj cov tawv, ntse-edged hais.Thaum lub log tig, txhua qhov khoom ua haujlwm zoo li ib qho cuab yeej txiav.
Sib tsoo log muaj nyob rau hauv ntau qhov ntau thiab tsawg, diameters, thicknesses, abrasive grain loj thiab binders.Abrasives yog ntsuas nyob rau hauv units ntawm particle loj los yog particle loj, nrog particle loj li ntawm 8-24 (coarse), 30-60 ( nruab nrab), 70-180 (zoo) thiab 220-1,200 (zoo heev).Cov qib coarser yog siv qhov twg cov khoom siv ntau heev yuav tsum tau muab tshem tawm.Feem ntau, qib finer yog siv tom qab qib coarser los ua kom tiav qhov smoother.
Lub log sib tsoo yog ua los ntawm ntau yam abrasives, nrog rau silicon carbide (feem ntau yog siv rau cov hlau tsis muaj hlau);alumina (siv rau high-zog hlau alloys thiab ntoo; pob zeb diamonds (siv rau ceramic sib tsoo los yog zaum kawg polishing); thiab cubic boron nitride (feem ntau yog siv rau hlau alloy).
Abrasives tuaj yeem raug cais ntxiv raws li kev sib koom ua ke, coated lossis hlau sib txuas.Lub taag abrasive yog tov nrog abrasive nplej thiab ib tug binder, thiab ces nias rau hauv lub log zoo.Lawv raug rho tawm haujlwm ntawm qhov kub thiab txias los tsim cov iav zoo li matrix, feem ntau hu ua vitrified abrasives.Coated abrasives yog ua los ntawm cov nplej abrasive sib koom ua ke rau lub substrate hloov tau (xws li ntawv lossis fiber ntau) nrog cov resin thiab / lossis kua nplaum.Txoj kev no feem ntau yog siv rau txoj siv tawv, cov nplooj ntawv, thiab cov paj ntoo.Hlau bonded abrasives, tshwj xeeb tshaj yog pob zeb diamond, yog tsau nyob rau hauv cov hlau matrix nyob rau hauv daim ntawv ntawm precision sib tsoo log.Cov hlau matrix yog tsim los hnav kom nthuav tawm cov xov xwm sib tsoo.
Cov khoom sib txuas los yog nruab nrab kho cov abrasive hauv kev sib tsoo thiab muab lub zog ntau.Voids lossis pores yog txhob txwm tso rau hauv lub log kom txhim khu kev xa khoom txias thiab tso cov chips.Nyob ntawm daim ntawv thov ntawm kev sib tsoo lub log thiab hom abrasive, lwm cov fillers tuaj yeem suav nrog.Bonds feem ntau yog cais raws li cov organic, vitrified lossis metallic.Txhua hom muab cov txiaj ntsig tshwj xeeb rau daim ntawv thov.
Organic lossis resin adhesives tuaj yeem tiv taus kev sib tsoo hnyav, xws li kev vibration thiab siab lateral zog.Organic binders yog tshwj xeeb tshaj yog tsim nyog rau nce tus nqi ntawm kev txiav nyob rau hauv ntxhib machining daim ntaub ntawv, xws li steel hnav khaub ncaws los yog abrasive txiav ua hauj lwm.Cov kev sib xyaw ua ke no kuj yog qhov tsim nyog rau kev sib tsoo ntawm cov ntaub ntawv superhard (xws li pob zeb diamond lossis ceramics).
Nyob rau hauv qhov kev sib tsoo ntawm cov khoom siv hlau ferrous (xws li cov hlau tawv tawv lossis npib tsib xee-raws li alloys), cov ntawv cog lus ceramic tuaj yeem muab kev hnav khaub ncaws zoo thiab kev ua haujlwm dawb.Ceramic daim ntawv cog lus tshwj xeeb yog tsim los kom muaj zog adhesion rau cubic boron nitride (cBN) hais los ntawm cov tshuaj tiv thaiv, uas ua rau muaj qhov sib piv zoo heev ntawm kev txiav ntim rau lub log hnav.
Cov yawm sij hlau muaj kev hnav zoo heev thiab zoo khaws cia.Lawv tuaj yeem sib txawv los ntawm ib txheej txheej electroplated khoom mus rau ntau lub log uas tuaj yeem ua kom muaj zog thiab ntom.Cov hlau sib txuas cov log yuav nyuaj dhau los hnav zoo.Txawm li cas los xij, ib hom tshiab ntawm kev sib tsoo log nrog cov hlau nplaum nplaum tuaj yeem hnav tau zoo ib yam li lub log sib tsoo ceramic thiab muaj qhov zoo tib yam kev sib tsoo sib tsoo.
Thaum lub sij hawm sib tsoo, lub log sib tsoo yuav hnav tawm, ua npub, plam nws cov duab los yog "load" vim yog chips lossis chips sticking rau abrasive.Tom qab ntawd, lub log sib tsoo pib rub lub workpiece es tsis txhob txiav.Qhov xwm txheej no ua rau muaj cua sov thiab txo cov kev ua haujlwm ntawm lub log.Thaum lub log load nce, chattering tshwm sim, uas cuam tshuam rau saum npoo ntawm lub workpiece.Lub sijhawm voj voog yuav nce ntxiv.Nyob rau lub sijhawm no, lub log sib tsoo yuav tsum tau "hnav khaub ncaws" txhawm rau txhawm rau sib tsoo lub log, yog li tshem tawm cov khoom seem ntawm qhov sib tsoo lub log thiab rov ua kom lub log sib tsoo rov qab mus rau nws cov qauv qub, thaum nqa cov khoom sib tsoo tshiab rau saum npoo.
Ntau hom kev sib tsoo log hnav yog siv rau kev sib tsoo.Feem ntau yog ib qho taw tes, zoo li qub, onboard pob zeb diamond dresser, uas yog nyob rau hauv ib qho thaiv, feem ntau yog nyob rau hauv headstock los yog tailstock ntawm lub tshuab.Qhov saum npoo ntawm lub log sib tsoo dhau los ntawm lub pob zeb diamond no, thiab ib qho me me ntawm lub log sib tsoo raug tshem tawm kom ua kom nws zoo dua.Ob mus rau peb pob zeb diamond blocks tuaj yeem siv los hloov kho qhov chaw, sab, thiab cov duab ntawm lub log.
Rotary trimming yog tam sim no ib txoj kev nrov.Rotary dresser yog coated nrog ntau pua pob zeb diamond.Nws feem ntau yog siv rau creep pub sib tsoo daim ntawv thov.Ntau lub tuam txhab pom tau tias rau cov txheej txheem uas yuav tsum tau muaj kev tsim khoom siab thiab / lossis kev ua haujlwm nruj, qhov kev txiav tawm yog zoo dua li ib qho taw tes lossis pawg trimming.Nrog rau kev taw qhia ntawm ceramic superabrasive log, rotary hnav khaub ncaws tau dhau los ua qhov tsim nyog.
Oscillating dresser yog lwm hom kev hnav khaub ncaws siv rau kev sib tsoo loj uas yuav tsum tau hnav khaub ncaws sib sib zog nqus thiab ntev dua.
Cov khaub ncaws offline feem ntau yog siv rau kev sib tsoo lub log kom deb ntawm lub tshuab, thaum siv qhov sib piv kho qhov muag los txheeb xyuas cov duab profile.Qee cov grinders siv hlau-txiav hluav taws xob tawm tshuab los hnav hlau daim ntawv cog lus log uas tseem ntsia tau rau ntawm lub tshuab sib tsoo.
Kawm paub ntxiv txog kev yuav cov cuab yeej siv tshuab tshiab los ntawm kev mus saib "Machine Tool Buying Guide" hauv Techspex Knowledge Center.
Optimizing camshaft lobe sib tsoo voj voog tau ib txwm muaj tsawg dua los ntawm kev tshawb fawb, thiab ntau dua los ntawm kev paub txog kev kwv yees thiab kev sim sib tsoo ntau.Tam sim no, khoos phis tawj thermal qauv software tuaj yeem kwv yees thaj chaw uas lub lobe hlawv tuaj yeem tshwm sim los txiav txim siab ua haujlwm ceev tshaj plaws uas yuav tsis ua rau thermal puas rau lub lobe, thiab txo qis ntau qhov tsim nyog kev sib tsoo.
Ob txoj kev siv thev naus laus zis-super abrasive log thiab high-precision servo tswj-ua ke los muab cov txheej txheem sib tsoo contour zoo ib yam li kev ua haujlwm sab nraud.Rau ntau qhov nruab nrab ntim OD sib tsoo daim ntawv thov, txoj kev no yuav yog ib txoj hauv kev los muab ntau yam kev tsim khoom rau hauv ib qho kev teeb tsa.
Txij li thaum creep pub sib tsoo tuaj yeem ua tiav cov khoom tshem tawm cov nqi siab hauv cov ntaub ntawv nyuaj, kev sib tsoo yuav tsis yog qhov kawg ntawm cov txheej txheem - nws yuav yog cov txheej txheem.
Post lub sij hawm: Aug-02-2021