Thaum ua tiav superfinishing, nws yog ib qho tseem ceeb heev uas yuav tau xaiv txoj caihoning pob zeb. Qhov tseeb sharpening pob zeb xaiv muaj feem xyuam rau qhov zoo, ntau lawm efficiency thiab ntau lawm nqi ntawm superfinishing. Superfinishing yog qhov tsawg-ceev, qis-kub thiab qis-siab micro-sib tsoo txheej txheem. Lub pob zeb honing tsis tau txiav thaum ua haujlwm, tab sis nws cov yam ntxwv ua haujlwm yuav tsum tau khaws cia thaum lub voj voog ua haujlwm. Yog li ntawd, oilstone yuav tsum muaj ob qho tib si txiav kev ua tau zoo thiab kev ua tiav thiab polishing kev ua haujlwm. Cov yam ntxwv uas txiav txim siab qhov kev ua tau zoo ntawm cov pob zeb ntse xws li abrasive, abrasive grain loj, binder, qauv, hardness thiab hardness uniformity.
1. Abrasives ntawm honing pob zeb
Cov abrasives siv los ua oilstone muaj xws li WA, GC, SC, WA / GC (mixed abrasive), WA / SC (mixed abrasive), WA / C (graphite sharpening pob zeb), thiab lwm yam. WA / GC (mixed abrasive) thiab WA / SC (mixed abrasive) feem ntau siv hauv kev lag luam bearing.
2. Grain loj ntawm abrasive
Muaj 14 qib ntawm micro hmoov nplej loj rau kev ua pob zeb honing, los ntawm W63 txog W0.5. Tus naj npawb micro hmoov siv rau super refined oilstone hauv kev lag luam bearing feem ntau ntawm W2.5 thiab W28. Coarse grain loj muaj zog txiav muaj peev xwm thiab siab ntau lawm efficiency; fine grain loj muaj tsawg txiav efficiency thiab tsis tshua muaj ntau lawm efficiency, tab sis tsawg nto roughness. Muaj qee qhov kev sib raug zoo ntawm micro hmoov nplej loj thiab qhov chaw roughness, saib cov lus hauv qab no.
Kev sib raug zoo ntawm abrasive grain loj, nto roughness thiab machining pub
|
Abrasivenplejqhov loj/um |
W28 |
W20 |
W14 |
W10 |
W7 |
W5 |
|
Particle loj/um |
28-20 |
20-14 |
14-10 |
10-7 |
7-5 |
5-3.5 |
|
RoughnessRa/um |
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 pub rau txoj kab uas hla/um |
12-16 |
10-12 |
8-10 |
6-9 |
5-8 |
3-5 |
3. Honing pob zeb binder
sharpening pob zeb binders muaj xws li ceramic, resin, iav ceramic, polyethylene thiab graphite. Ntxig pob zeb binders yuav tsum tuav ib tug firmness ntawm abrasive bonding thiab yuav yooj yim rau nws tus kheej-sharpen. Nyob rau hauv kev lag luam bearing, ceramic binders yog feem ntau siv nyob rau hauv superfinishing.
4. Cov qauv ntawm honing pob zeb
Cov qauv ntawm cov pob zeb sharpening yog xoob thiab muaj qhov porosity loj, uas tuaj yeem ua kom qhov chaw kom haum rau kev sib tsoo chips, txhim kho lub xeev ua haujlwm ntawm oilstone, thiab ua kom lub siab ntawm cov pob zeb sib tsoo. Cov pob zeb sib tsoo yuav tsis lo rau cov chips thiab khawb cov khoom ua haujlwm, tab sis qhov porosity loj dhau, kev txiav nws tus kheej yog qhov muaj zog heev, cov roj pob zeb tau noj sai heev, cov nyhuv ua tiav tsis zoo, thiab qhov roughness Ra yog siab. Yog li ntawd, lub porosity ntawm kev sib tsoo pob zeb yuav tsum tsim nyog. Feem ntau, tus qauv ntawm cov kabmob superfinishing sharpening pob zeb yog 10 ~ 12 (porosity 43% ~ 49%).
5. Hardness thiab hardness uniformity ntawm honing pob zeb
Lub hardness ntawm sharpening pob zeb ncaj qha cuam tshuam nws tus kheej-sharpening thaum ua. Yog tias qhov hardness tsawg dhau lawm, cov nplej abrasive yuav raug sib cais sai heev. Nyob rau hauv ib qho kev sib tsoo ntau npaum li cas, cov txheej txheem polishing superfinishing tsis tuaj yeem tsim, thiab qhov roughness tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua. Yog hais tias lub oilstone nyuaj heev, nws qhov chaw ua hauj lwm yog yooj yim clogged thiab tsis tuaj yeem txiav, thiab nws tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm superfinishing. Feem ntau, qhov rougher saum npoo yuav tsum tau ua, lub coarser lub sib tsoo pob zeb nplej thiab ntau dua hardness; Yog hais tias qhov saum npoo hardness yuav tsum tau ua yog siab heev, ib tug softer sib tsoo pob zeb yuav tsum tau xaiv. Rau cov ntaub ntawv uas muaj hardness siab, ib tug tsawg-hardness oilstone yuav tsum tau xaiv, thiab rau cov ntaub ntawv uas tsis muaj hardness, ib tug high-hardness sharpening pob zeb yuav tsum tau xaiv.
Rau cov kabmob superfinishing, tus nqi hardness ntawm li 50HRC feem ntau yog xaiv. Lub uniformity ntawm honing pob zeb hardness hais txog qhov sib txawv ntawm hardness ntawm txhua feem ntawm cov pob zeb sib tsoo. Thaum lub sij hawm superfinishing, qhov chaw sib cuag ntawm oilstone thiab saum npoo ntawm lub nplhaib yog qhov loj, yog li qhov tsis sib xws ntawm cov pob zeb sharpening ncaj qha ua rau qhov tsis sib xws ntawm qhov roughness ntawm lub nplhaib, uas yuav cuam tshuam rau cov duab raug ntawm lub nplhaib. Tus nqi hardness ntawm lub pob zeb honing yuav tsum tsis pub dhau 3 ~ 5HRC.