Nyob rau hauv bearing nplhaib superfinishing, xaiv txoj caihoning pob zebNws yog ib qho tseem ceeb heev vim hais tias nws ncaj qha cuam tshuam rau machining zoo, ntau lawm efficiency, thiab ua cov nqi. Superfinishing yog qhov qis- nrawm, qis- kub, thiab qis-siab precision sib tsoo txheej txheem. Txij li thaum lub cuab yeej tsis hnav thaum lub sijhawm ua haujlwm, nws yuav tsum tuav ruaj khov txiav thiab polishing kev ua tau zoo thoob plaws hauv cov txheej txheem machining.
Cov yam tseem ceeb cuam tshuam rau kev ua tau zoo muaj xws li hom abrasive, grit loj, daim ntawv cog lus, qauv, hardness, thiab hardness uniformity.
1. Hom Abrasive
Cov abrasives uas siv los tsim cov pob zeb honing muaj xws li WA, GC, SC, WA / GC sib xyaw abrasive, WA / SC sib xyaw abrasive, thiab WA / C graphite abrasive.
Hauv kev lag luam bearing, WA / GC thiab WA / SC sib xyaw abrasives tau dav siv vim tias lawv muab qhov sib npaug zoo ntawm kev txiav peev xwm thiab kev ua tiav ntawm qhov chaw.
2. Abrasive Grit Loj
Lub grit loj ntawm micro abrasives nyob ntawm W63 txog W0.5. Rau kev siv cov kabmob superfinishing, feem ntau siv yog W2.5 txog W28.
Coarse grit muab muaj zog txiav muaj peev xwm thiab ntau lawm efficiency, thaum nplua grit ua ib tug smoother nto nrog qis roughness. Kev xaiv yuav tsum yog raws li qhov xav tau ntawm qhov chaw zoo thiab kev siv tshuab machining.
|
Abrasive Grit Loj (μm) |
W28 |
W20 |
W14 |
W10 |
W7 |
W5 |
|
Abrasive Particle Loj (μm) |
28–20 |
20–14 |
14–10 |
10–7 |
7–5 |
5–3.5 |
|
Nto Roughness Ra (μm) |
0.10–0.15 |
0.08–0.12 |
0.05–0.08 |
0.025–0.05 |
0.02–0.025 |
0.012–0.025 |
|
Machining Allowance per Diameter (μm) |
12–16 |
10–12 |
8–10 |
6–9 |
5–8 |
3–5 |
3. Hom Bond
Daim ntawv cog lus txiav txim siab lub zog, ua haujlwm ntev, thiab tus kheej -ntse muaj peev xwm ntawm cov cuab yeej abrasive. Cov ntawv cog lus muaj xws li vitrified, resin, iav -ceramic, polyethylene, thiab graphite.
Rau cov kabmob superfinishing, vitrified daim ntawv cog lus yog qhov feem ntau xaiv vim nws muaj kev ua haujlwm ruaj khov, zoo hnav tsis kam, thiab txhim khu kev qha abrasive tuav.
4. Qauv
Cov qauv ntawm lub pob zeb honing cuam tshuam rau nti tshem tawm thiab kev sib tsoo ua haujlwm. Cov qauv qhib muaj ntau qhov chaw rau tuav cov khib nyiab sib tsoo, pab tiv thaiv kev txhaws thiab txo cov khawb ntawm qhov chaw ua haujlwm.
Txawm li cas los xij, porosity ntau dhau tuaj yeem ua rau hnav sai thiab txo qhov kev ua tiav tiav. Rau cov kabmob superfinishing, cov qauv qib feem ntau xaiv ntawm 10 thiab 12, nrog rau qhov porosity ntawm 43% -49%.
5. Hardness thiab Hardness Uniformity
Lub hardness ntawm lub pob zeb honing ncaj qha cuam tshuam rau nws tus kheej -ntse muaj peev xwm. Yog hais tias lub hardness tsawg dhau lawm, cov nplej abrasive yuav tshem tawm sai heev, ua rau nws nyuaj rau ua tiav qhov yuav tsum tau ua tiav. Yog tias qhov hardness siab dhau lawm, qhov chaw ua haujlwm yuav ua rau txhaws thiab poob kev ua haujlwm.
Feem ntau, cov ntaub ntawv nyuaj dua yuav tsum muaj cov cuab yeej softer, thaum cov ntaub ntawv softer xav tau cov khoom nyuaj. Rau kev coj tus kheej superfinishing, qib hardness nyob ib ncig ntawm 50 HRC feem ntau xaiv.
Hardness uniformity yog lwm yam tseem ceeb. Qhov tsis sib xws ntawm lub pob zeb honing tuaj yeem ua rau qhov tsis sib xws ntawm qhov roughness thiab cuam tshuam rau qhov tseeb qhov tseeb ntawm cov kabmob rings. Lub hardness variation feem ntau yuav tsum tau tswj nyob rau hauv 3-5 HRC.
Lub pob zeb honing xaiv tau zoo tuaj yeem tswj hwm qhov sib npaug ntawm kev ua tau zoo thiab polishing muaj peev xwm, pab ua kom tiav siab -precision bearing nplhaib nto nrog zoo sib xws thiab efficiency.
