1. Kev sib tsoo yog dab tsi?Sim hais ntau hom kev sib tsoo.
Teb: Sib tsoo yog txoj kev ua haujlwm uas tshem tawm cov txheej txheem ntau dhau ntawm qhov chaw ua haujlwm los ntawm kev txiav txim siab ntawm cov cuab yeej abrasive, kom lub ntsej muag zoo ntawm lub workpiece ua tau raws li qhov yuav tsum tau ua.Cov ntawv sib tsoo feem ntau suav nrog: kev sib tsoo cylindrical, kev sib tsoo sab hauv, tsis muaj kev sib tsoo, xov sib tsoo, sib tsoo ntawm qhov chaw tiaj tus ntawm workpieces, thiab kev sib tsoo ntawm qhov chaw.
2. Dab tsi yog cov cuab yeej abrasive?Dab tsi yog qhov muaj pes tsawg leeg ntawm kev sib tsoo log?Yam dab tsi txiav txim siab nws qhov kev ua tau zoo?
Teb: Tag nrho cov cuab yeej siv rau kev sib tsoo, sib tsoo thiab polishing yog sib sau ua ke los ua cov cuab yeej abrasive, feem ntau yog ua los ntawm abrasives thiab binders.
Sib tsoo log yog tsim los ntawm abrasive nplej, binders thiab pores (qee zaum tsis muaj), thiab lawv cov kev ua tau zoo yog txiav txim siab los ntawm yam xws li abrasives, particle loj, binders, hardness thiab lub koom haum.
3. Dab tsi yog hom abrasives?Sau ntau yam siv abrasives.
Teb: Lub abrasive yog lub luag haujlwm ncaj qha rau kev txiav ua haujlwm, thiab yuav tsum muaj qhov tawv tawv siab, tiv taus cua sov thiab qee qhov tawv, thiab yuav tsum tuaj yeem tsim cov npoo ntse thiab cov fab thaum tawg.Tam sim no, muaj peb hom abrasives feem ntau siv hauv kev tsim khoom: oxide series, carbide series thiab high-hard abrasive series.Feem ntau siv abrasives yog dawb corundum, zirconium corundum, cubic boron carbide, hluavtaws pob zeb diamond, cubic boron nitride, thiab lwm yam.
4. Cov qauv ntawm kev sib tsoo log hnav yog dab tsi?Lub ntsiab lus ntawm kev sib tsoo log hnav yog dab tsi?
Teb: Kev hnav ntawm lub log sib tsoo feem ntau suav nrog ob theem: abrasive poob thiab kev sib tsoo lub log tsis ua haujlwm.Kev poob ntawm abrasive nplej ntawm qhov chaw sib tsoo tuaj yeem muab faib ua peb hom: passivation ntawm abrasive nplej, crushing ntawm abrasive nplej, thiab shedding ntawm abrasive nplej.Nrog rau lub sijhawm ua haujlwm ntev ntawm lub log sib tsoo, nws lub peev xwm txiav maj mam txo qis, thiab thaum kawg nws tsis tuaj yeem ua rau hauv av ib txwm, thiab qhov tseeb machining qhov tseeb thiab qhov chaw zoo tsis tuaj yeem ua tiav.Lub sijhawm no, kev sib tsoo lub log tsis ua haujlwm.Muaj peb hom: dulling ntawm qhov chaw ua hauj lwm ntawm lub sib tsoo log, thaiv ntawm qhov chaw ua hauj lwm ntawm lub sib tsoo log, thiab distortion ntawm lub contour ntawm lub sib tsoo log.
Thaum lub log sib tsoo raug tshem tawm, nws yuav tsum rov hnav lub log sib tsoo.Kev hnav khaub ncaws yog ib lo lus dav dav rau shaping thiab sharpening.Shaping yog ua kom lub sib tsoo log muaj ib tug geometric duab nrog tej yam precision yuav tsum tau;sharpening yog tshem tawm tus neeg sawv cev ntawm lub abrasive grains, thiaj li hais tias cov nplej abrasive protrude los ntawm cov neeg sawv cev sib txuas mus rau ib tug tej qhov siab (kwv yees li 1/3 ntawm qhov loj ntawm cov abrasive grain), tsim ib tug zoo txiav ntug thiab txaus crumb qhov chaw. .Lub shaping thiab sharpening ntawm zoo tib yam sib tsoo log yog feem ntau nqa tawm nyob rau hauv ib tug;lub shaping thiab sharpening ntawm superabrasive sib tsoo log yog feem ntau sib cais.Tus qub yog kom tau txais qhov zoo tshaj plaws sib tsoo log geometry thiab tom kawg yog los txhim kho qhov ntse ntawm kev sib tsoo.
5. Dab tsi yog cov qauv kev sib tsoo hauv cylindrical thiab nto sib tsoo?
Teb: Thaum sib tsoo lub voj voog sab nrauv thiab lub dav hlau, qhov kev sib tsoo muaj xws li plaub daim ntawv: lub ntsiab lus, radial feed motion, axial feed motion thiab workpiece rotation or linear motion.
6. Piav qhia luv luv txog kev sib tsoo ntawm ib qho abrasive particle.
Teb: Cov txheej txheem sib tsoo ntawm ib qho abrasive grain yog kwv yees li faib ua peb theem: zawv zawg, qhab nia thiab txiav.
(1) zawv zawg theem: Thaum lub sij hawm sib tsoo, txiav thickness maj mam nce los ntawm xoom.Nyob rau hauv lub zawv zawg theem, vim qhov me me txiav thickness agg thaum lub abrasive txiav ntug thiab lub workpiece pib sib cuag, thaum lub blunt vojvoog vojvoog rn>acg ntawm lub ces kaum sab saum toj ntawm lub abrasive nplej, abrasive nplej tsuas yog plam ntawm qhov chaw. ntawm lub workpiece, thiab tsuas yog tsim Elastic deformation, tsis muaj chips.
(2) Scribing theem: nrog rau qhov nce ntawm qhov tob ntawm cov khoom abrasive, lub siab ntawm cov khoom abrasive thiab qhov chaw ntawm lub workpiece maj mam nce, thiab cov txheej saum npoo kuj hloov ntawm elastic deformation mus rau yas deformation.Lub sijhawm no, qhov kev sib txhuam extrusion yog qhov hnyav, thiab cov cua kub ntau yog tsim.Thaum cov hlau tau rhuab mus rau qhov tseem ceeb, qhov kev ntxhov siab ib txwm muaj siab tshaj qhov tseem ceeb ntawm cov khoom siv, thiab cov ntug txiav pib txiav rau saum npoo ntawm cov khoom.Lub slippage thawb cov khoom nto mus rau pem hauv ntej thiab ob sab ntawm cov nplej abrasive, ua rau cov nplej abrasive carve grooves rau ntawm qhov chaw ntawm lub workpiece, thiab bulges ntawm ob sab ntawm cov grooves.Cov yam ntxwv ntawm cov theem no yog: cov yas ntws thiab cov pob txha tshwm sim ntawm qhov chaw ntawm cov khoom siv, thiab cov chips tsis tuaj yeem tsim vim qhov txiav thickness ntawm cov khoom abrasive tsis ncav cuag tus nqi tseem ceeb ntawm kev tsim cov nti.
(3) Txiav theem: Thaum qhov kev nkag siab tob nce mus rau qhov tseem ceeb, cov txheej txheem txiav pom tseeb slips raws li cov shear nto nyob rau hauv lub extrusion ntawm abrasive hais, ua chips ntws tawm raws lub ntsej muag rake, uas yog hu ua lub txiav theem.
7. Siv cov tshuaj JCJaeger los ntsuas qhov ntsuas kub ntawm qhov chaw sib tsoo thaum lub sij hawm sib tsoo qhuav.
Teb: Thaum sib tsoo, qhov sib cuag arc ntev kuj yog me me vim qhov me me ntawm kev txiav.Yog li nws tuaj yeem suav hais tias yog ib qho khoom siv hluav taws xob zoo li lub zog txav mus rau saum npoo ntawm lub cev semi-infinite.Qhov no yog qhov chaw ntawm JCJaeger qhov kev daws teeb meem.(a) Qhov chaw tshav kub nyob rau hauv qhov chaw sib tsoo (b) Kev sib koom ua ke ntawm qhov chaw tshav kub ntawm qhov chaw hauv kev txav.
Qhov sib tsoo sib cuag arc cheeb tsam AA￠B￠B yog qhov siv hluav taws xob siv hluav taws xob, thiab nws cov cua sov siv yog qm;nws qhov dav w yog cuam tshuam nrog txoj kab uas hla ntawm kev sib tsoo log thiab qhov sib tsoo qhov tob.Thaum tshav kub kub qhov chaw AA￠B￠B tuaj yeem suav tias yog kev sib txuas ntawm suav tsis txheeb cov kab hluav taws xob hluav taws xob dxi, siv qee qhov hluav taws xob tawm hluav taws xob dxi rau kev tshawb nrhiav, nws qhov kub ntawm qhov siv yog qmBdxi, thiab txav mus raws X kev taw qhia nrog ceev Vw.
8. Dab tsi yog hom kev sib tsoo kub thiab lawv cov kev tswj xyuas?
Teb: Nyob ntawm qhov tshwm sim ntawm qhov kub hnyiab, muaj kev kub nyhiab, qhov chaw kub hnyiab, thiab kab kub hnyiab (kab hlawv ntawm tag nrho cov nto ntawm ib feem).Raws li qhov xwm txheej ntawm qhov chaw microstructure hloov pauv, muaj: tempering burns, quenching burns, thiab annealing burns.
Nyob rau hauv cov txheej txheem sib tsoo, lub ntsiab yog vim li cas rau kev kub hnyiab yog qhov kub ntawm qhov chaw sib tsoo yog siab dhau.Txhawm rau txo qhov kub ntawm qhov sib tsoo, ob txoj hauv kev tuaj yeem ua kom txo tau cov tiam ntawm kev sib tsoo cua sov thiab ua kom lub zog ntawm kev sib tsoo kub.
Cov kev tswj xyuas tau siv ntau zaus:
(1) Tsim nyog xaiv cov nyiaj sib tsoo;
(2) Xaiv lub log sib tsoo kom raug;
(3) Tsim nyog siv cov txheej txheem txias
9. Kev sib tsoo siab yog dab tsi?Piv nrog rau kev sib tsoo zoo tib yam, dab tsi yog cov yam ntxwv ntawm kev kub ceev sib tsoo?
Teb: Kev sib tsoo high-speed yog ib txoj hauv kev los txhim kho kev sib tsoo kom zoo thiab kev sib tsoo zoo los ntawm kev ua kom cov kab nrawm ntawm kev sib tsoo.Qhov sib txawv ntawm nws thiab kev sib tsoo zoo tib yam yog nyob rau hauv kev sib tsoo ceev thiab pub tus nqi, thiab lub ntsiab lus ntawm kev sib tsoo high-speed yog nce nrog lub sijhawm.Ua ntej xyoo 1960, thaum kev sib tsoo ceev yog 50m / s, nws tau hu ua kev sib tsoo high-speed.Hauv xyoo 1990, qhov kev sib tsoo siab tshaj plaws tau mus txog 500m / s.Hauv kev siv cov tswv yim, kev sib tsoo ceev tshaj 100m / s yog hu ua kev sib tsoo high-speed.
Piv nrog rau kev sib tsoo zoo tib yam, kev sib tsoo high-speed muaj cov yam ntxwv hauv qab no:
(1) Nyob rau hauv cov xwm txheej uas tag nrho lwm yam tsis tu ncua, tsuas yog nce lub sib tsoo lub log ceev yuav ua rau txo qis ntawm cov thickness thiab qhov sib thooj ntawm cov txiav quab yuam ua rau txhua qhov abrasive particle.
(2) Yog hais tias lub workpiece ceev yog nce nyob rau hauv kev faib ua feem rau lub sib tsoo log ceev, txiav thickness yuav nyob twj ywm unchanged.Nyob rau hauv cov ntaub ntawv no, lub txiav quab yuam ua hauj lwm ntawm txhua abrasive grain thiab lub resultant sib tsoo quab yuam tsis hloov.Qhov zoo tshaj plaws ntawm qhov no yog tias cov khoom tshem tawm tus nqi nce proportionally nrog tib lub zog sib tsoo.
10. Qhia luv luv txog qhov yuav tsum tau muaj kev sib tsoo siab rau kev sib tsoo lub log thiab cov cuab yeej siv tshuab.
Teb: High-speed sib tsoo lub log yuav tsum ua tau raws li cov hauv qab no:
(1) Lub zog ntawm kev sib tsoo lub log yuav tsum muaj peev xwm tiv taus lub zog txiav thaum lub sij hawm sib tsoo ceev;
(2) Kev nyab xeeb thiab kev ntseeg siab thaum sib tsoo ceev;
(3) ntse tsos;
(4) Lub binder yuav tsum muaj siab hnav tsis kam los txo qhov hnav ntawm lub log sib tsoo.
Yuav tsum muaj rau kev sib tsoo high-speed ntawm cov cuab yeej siv tshuab:
(1) High-speed spindle thiab nws cov bearings: Cov bearings ntawm high-speed spindles feem ntau siv angular hu pob bearings.Txhawm rau txo cov cua sov ntawm cov spindle thiab ua kom lub siab tshaj plaws ceev ntawm spindle, feem ntau ntawm cov tiam tshiab ntawm high-speed electric spindles yog lubricated los ntawm roj thiab roj.
(2) Ntxiv nrog rau kev ua haujlwm ntawm cov tshuab sib tsoo zoo tib yam, cov tshuab ua haujlwm siab ceev kuj yuav tsum tau ua raws li cov kev cai tshwj xeeb hauv qab no: siab dynamic raug, siab damping, siab vibration kuj thiab thermal stability;highly automated thiab txhim khu kev qha sib tsoo txheej txheem.
(3) Tom qab kev sib tsoo lub log nrawm nce, nws lub zog kinetic kuj nce ntxiv.Yog tias lub log sib tsoo tawg, nws yuav pom tseeb ua rau muaj kev phom sij rau tib neeg thiab khoom siv ntau dua li kev sib tsoo zoo tib yam.Vim li no, ntxiv rau kev txhim kho lub zog ntawm lub log sib tsoo nws tus kheej, tshwj xeeb Lub log tiv thaiv rau kev sib tsoo ceev yog qhov tseem ceeb rau kev nyab xeeb.
Post lub sij hawm: Lub Xya hli ntuj-23-2022