Dab tsi yog bearing super precision?
Bearing super-precision txheej txheem yog ib hom pub mov kom paub txog txoj kev ua tiav ntawm micro-sib tsoo.
Qhov saum npoo ua ntej superfinishing feem ntau precision tig thiab hauv av. Tshwj xeeb, nws txhais tau hais tias nyob rau hauv zoo lubrication thiab txias tej yam kev mob, ib tug nplua-grained abrasive cuab tam (whetstone) yog siv los siv ib tug me me siab rau lub workpiece, thiab nyob rau hauv cov kev taw qhia ntawm lub ntsug qhuav workpiece tig, lub workpiece rotating ntawm ib tug tej yam ceev. yog ceev thiab luv reciprocating oscillation Ib txoj kev ua kis las.
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Lub luag haujlwm ntawm bearing superfinishing yog dab tsi?
Nyob rau hauv cov txheej txheem dov bearing manufacturing, super precision yog qhov kawg txheej txheem ntawm bearing nplhaib ua. Nws yog qhov tsim nyog rau kev txo lossis tshem tawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib tsoo, kho qhov kev ua yuam kev ntawm qhov zawj, ua kom lub ntsej muag roughness, thiab txhim kho lub cev thiab lub zog ntawm qhov chaw. Nws ua lub luag haujlwm tseem ceeb hauv kev txo qis kev vibration thiab suab nrov ntawm cov kabmob thiab txhim kho lub luag haujlwm ntawm cov kabmob.
Nws tuaj yeem ua tiav hauv peb yam hauv qab no:
1. Nws tuaj yeem txo qhov waviness zoo. Nyob rau hauv cov txheej txheem super-tiav, txhawm rau xyuas kom meej tias whetstone ib txwm ua ntawm lub crest thiab tsis kov lub trough, lub arc ntawm whetstone thiab workpiece yog ≥ lub wavelength ntawm waviness ntawm lub workpiece nto. Nyob rau hauv txoj kev no, kev sib cuag ntawm lub crest yog qhov loj, thiab lub ncov yog txiav, yog li txo qhov waviness.
2. Txhim kho qhov zawj qhov yuam kev ntawm lub pob bearing raceway. Super-finishing tuaj yeem txhim kho qhov kev ua yuam kev ntawm qhov kev sib tw ntawm li 30%.
3. Compressive kev nyuaj siab tuaj yeem tsim rau ntawm qhov chaw ua tiav super. Nyob rau hauv tus txheej txheem ntawm superfinishing, txias yas deformation yog tsuas yog tsim, yog li ntawd tom qab superfinishing, residual compressive kev nyuaj siab yog tsim nyob rau saum npoo ntawm lub workpiece.
4. Nws tuaj yeem ua rau thaj tsam ntawm qhov chaw ua haujlwm ntawm ferrule. Tom qab super-tiav, qhov chaw tiv tauj ntawm qhov chaw ua haujlwm ntawm lub ferrule tuaj yeem nce los ntawm 15% mus rau 40% tom qab sib tsoo rau 80% mus rau 95%. Daim duab bearing super-precision txheej txheem:
Txiav ntawm cov kabmob
Thaum lub nto ntawm lub grindstone yog nyob rau hauv kev sib cuag nrog lub convex peaks ntawm lub ntxhib raceway nto, vim hais tias ntawm me me cheeb tsam, lub zog ntawm ib chav tsev yog kuj loj. Ib feem ntawm cov nplej abrasive nyob rau saum npoo ntawm cov pob zeb tau poob tawm thiab tawg, nthuav tawm qee cov pob zeb tshiab thiab cov npoo.
Nyob rau tib lub sij hawm, lub nto convex peaks ntawm bearing workpiece yog raug mus rau ceev txiav, thiab lub convex peaks thiab cov av deterioration txheej nyob rau saum npoo ntawm cov bearing workpiece raug tshem tawm los ntawm kev txiav txim thiab rov qab txiav. Cov theem no yog hu ua theem txiav, thiab feem ntau ntawm cov npoo hlau raug tshem tawm ntawm theem no.
2. Ib nrab txiav ntawm cov kabmob
Raws li kev ua haujlwm txuas ntxiv, qhov saum npoo ntawm cov kabmob workpiece yog maj mam smoothed. Nyob rau lub sijhawm no, qhov chaw sib cuag ntawm cov pob zeb thiab qhov chaw ua haujlwm nce ntxiv, qhov siab ntawm ib cheeb tsam hauv ib cheeb tsam txo qis, qhov txiav qhov tob yuav txo qis, thiab txiav peev xwm tsis muaj zog. Nyob rau tib lub sijhawm, lub qhov hws ntawm qhov chaw ntawm cov pob zeb raug thaiv, thiab cov pob zeb yog nyob rau hauv ib nrab-txiav lub xeev. Cov theem no yog hu ua ib nrab-txiav theem ntawm bearing xov. Nyob rau hauv ib nrab-txiav theem, txiav cov qhab nia nyob rau saum npoo ntawm cov kabmob workpiece ua sib dua thiab pom cov xim tsaus dua.
3. Smoothing theem
Cov theem no tuaj yeem muab faib ua ob kauj ruam: ib qho yog theem kev sib tsoo; lwm qhov yog qhov sib tsoo theem tom qab txiav txiav.
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Sib tsoo kev hloov theem:
Abrasive hais yog txo los ntawm nws tus kheej-sharpening, ntug ntawm cov abrasive hais yog smoothed, thiab cov oxides ntawm tej chips pib embedded nyob rau hauv lub qhov khoob ntawm oilstone. Cov khoom abrasive thaiv lub qhov hws ntawm cov roj pob zeb, kom cov khoom abrasive tsuas yog txiav tsis muaj zog, nrog rau kev sib tsoo thiab polishing. Nyob rau lub sijhawm no, qhov chaw ntawm lub workpiece Lub roughness txo qis sai, thiab cov nti dub oxides ua raws li qhov chaw ntawm whetstone.
Nres qhov txiav thiab sib tsoo theem:
Kev sib txhuam ntawm cov roj pob zeb thiab cov khoom ua haujlwm yog du heev, qhov chaw sib cuag tau zoo heev, lub siab poob qis, thiab cov khoom abrasive tsis tuaj yeem nkag mus rau cov yeeb yaj kiab roj ntxiv mus rau qhov chaw ua haujlwm. Thaum cov roj zaj duab xis siab ntawm cov kabmob nto yog sib npaug nrog cov roj pob zeb siab, cov pob zeb roj yog ntab. Thaum lub sij hawm tsim cov roj zaj duab xis, cov nyhuv txiav tsis muaj nyob rau lub sijhawm no. Cov theem no yog tshwj xeeb rau super finishing.
