Txheeb xyuas daim ntawv thov kev sib tsoo log

1. Xaiv txoj kev sib tsoo log

Sib txawv sib tsoo lub log yuav tsum tau siv rau cov khoom sib txawv ntawm cov khoom sib txawv thiab cov txheej txheem sib txawv.

Txawm hais tias kev sib tsoo cov khoom siv tib yam, kev sib tsoo ntawm ntau hom sib tsoo lub log yuav txawv ntawm 2 ~ 5 zaug, yog li kev sib tsoo lub log yuav tsum raug xaiv.

Pob zeb diamond sib tsoo lub log yog cov cuab yeej sib tsoo rau cov khoom siv tawv tawv, iav kho qhov muag, ceramics, gemstones thiab cov khoom siv pob zeb uas tsis yog xim hlau uas muaj siab hardness thiab siab brittleness.

Tab sis vim hais tias pob zeb diamond yooj yim rau carbonized ntawm 700 degree ~ 800 degree, nws tsis haum rau kev sib tsoo hlau.

CBN me ntsis qis dua lub hardness ntawm pob zeb diamond, tab sis nws thermal stability (uas tuaj yeem tiv taus kub txog 1300 degree ~ 1400 degree), nws tsis zoo li lub pob zeb diamond hauv qhov kub siab decomposition, uas yog, oxidation thiab graphitization, thiab cov ntsiab lus ntawm hlau. pawg chemical inertness, siab thermal conductivity (46 npaug ntawm corundum), ua los ntawm kev sib tsoo log lub neej ntev (txog li ob peb lub sij hawm lub corundum sib tsoo log mus rau ntau tshaj ib puas lub sij hawm), yog lwm corundum sib tsoo log sib tsoo ntawm hardened steel, high-speed tool steel, bearing steel, stainless hlau, tshav kub-resistant steel thiab titanium alloys xws li abrasive hardness toughness ntawm cov ntaub ntawv hlau.

Cov neeg sawv cev ntawm cov tawv tawv abrasive yog cov cob, hlau, ceramics, electroplating thiab brazing.

Resin bonded sib tsoo lub log yog siv los txiav cov cuab yeej ntsuas, sib tsoo qhov, sib tsoo cylindrical thiab dav hlau sib tsoo.

Hlau sib tsoo lub log yog siv rau kev txiav rau hauv cov duab sib tsoo ntawm qhov muag nkhaus sib tsoo tshuab, ib qho ntug txiav cov cuab yeej, muab kauv zawj sib tsoo ntawm cov khoom me me, thiab tseem siv rau kev sib tsoo electrolytic.

Ceramic binder sib tsoo lub log ntawm kev sib tsoo zoo, zoo zoo khaws cia, siab durability, hnav yooj yim, sib tsoo log kev pab cuam lub neej ntev, thiab vim hais tias ntawm ceramic daim ntawv cog lus nws tus kheej muaj tshuaj stability, kub resistant, roj resistant, resistant rau acid thiab alkali yaig, tuaj yeem hloov mus rau txhua yam kev sib tsoo kua, sib tsoo tus nqi qis, thiab yog li ntawd yuav tsum tau ua thawj xaiv ntawm kev ua haujlwm siab, siab precision sib tsoo abrasive;

Electroplated sib tsoo lub log yog tsim rau kev kub ceev zoo sib tsoo thiab sib tsoo, nrog rau kev sib tsoo zoo ntawm qhov (ntub sib tsoo) thiab siv rau kev sib koom ua ke.

Brazing log yog tsim rau ultra-siab ceev sib tsoo.

Nws yuav tsum tau taw qhia tias abrasive ntawm ntau hom muaj qhov sib txawv siv lead ua thiab particle zoo vim muaj cov txheej txheem tsim khoom sib txawv, thiab muaj zog sib txawv, thermal stability thiab crushing yam ntxwv. Cov ntaub ntawv sib txawv yuav tsum raug xaiv raws li hom kev sib khi, cov khoom siv ua haujlwm thiab kev sib tsoo.

Rau siab zog, siab precision sib tsoo ntawm ceramic binder log, siv abrasive nrog ntse grain zoo li PDA (synthetic pob zeb diamond) thiab ABN800 (CBN) los ntawm DeBeers los yog lwm yam hom zoo sib xws.

Muaj ob hom khaub ncaws nyob rau saum npoo ntawm cov abrasive, uas yuav tsum tau xaiv raws li cov xwm txheej sib txawv, xws li hom binder, cov khoom siv ua haujlwm, kev sib tsoo qhuav thiab sib tsoo ntub.

Cov khaub ncaws tooj liab feem ntau yog siv rau kev sib tsoo qhuav, xws li RVD-Cu thiab CBN-Cu.

Kev sib tsoo ntub dej nickel txheej, xws li RVD-Ni, CBN-Ni. Tam sim no, cov hlau plating tau tsim los ntawm npib tsib xee, tooj liab mus rau titanium, tungsten alloy, non-metallic ceramics, los ntawm ib txheej rau txheej txheej, thiab tau tsim los ntawm abrasive txheej rau micro hmoov txheej.

Lub concentration ntawm hard abrasive sib tsoo log yuav tsum tsis txhob tsawg dhau. High concentration tuaj yeem ua rau kev sib tsoo siab. Lub 200% concentration ntawm super nyuaj abrasive log yog ib hom zoo tib yam sib tsoo log nrog super nyuaj abrasive li cov khoom pab, yog li nws feem ntau tsis pom zoo kom siv lub npe.

Tam sim no, lub siab concentration ntawm kev kub ceev thiab high efficiency sib tsoo yog saws, thiab siab concentration ntawm ceramic binder CBN sib tsoo log yog saws. Qhov concentration ntawm ceramic binder CBN sib tsoo log feem ntau yog xaiv saum toj no 125%, thiab cov concentration ntawm cov khoom sib txawv ntawm cov ceramic CBN sib tsoo log feem ntau yog 175% ~ 200%.

Qib hardness ntawm lub log sib tsoo qhia tus nqi tuav lub zog ntawm cov cement ntawm abrasive.

Uniform thiab ruaj khov hardness ntawm kev sib tsoo log thiab tsim nyog xaiv ntawm hardness yog ib qho tseem ceeb ua ntej kom paub tseeb tias kev sib tsoo zoo.

Txawv teb chaws super nyuaj abrasive sib tsoo log feem ntau muaj 3 ~ 7 hardness theem xaiv los ntawm, tab sis lub super tawv abrasive log tsim nyob rau hauv Tuam Tshoj tsis yog tus qauv hardness theem, thiab cov qauv coj tsis tau teev nyob rau hauv GB6409, yog li qhov zoo tsis yooj yim los lav, nqa qhov tsis yooj yim rau cov neeg siv, thiab nws tseem ceeb heev uas yuav tsum tau ntxiv thiab txhim kho.

2. xaiv qhov tsim nyog ntawm kev sib tsoo

Kev sib tsoo ceev ntawm superhard abrasive log yuav tsum raug xaiv raws li kev sib tsoo hom, sib tsoo hom thiab txias txias.

Kev ua haujlwm ceev ntawm lub log sib tsoo tuaj yeem txhim kho qhov kev sib tsoo thiab kev sib tsoo sib piv (piv txwv li, kev sib tsoo ceev ntawm lub log sib tsoo tuaj yeem nce 40% thiab qhov sib tsoo sib tsoo tuaj yeem ua ob npaug) thiab txo tus nqi sib tsoo.

Kev sib tsoo ceev ntawm cov hlau thiab pob zeb diamond sib tsoo log yog feem ntau 35 ~ 60m / s. Kev sib tsoo ceev ntawm ceramic bonded CBN log tuaj yeem nce mus rau 45 ~ 160m / s. Lub linear ceev ntawm ib txheej CBN log tuaj yeem yog 125 ~ 250m / s.80 ~ 125m / s.

Qhov sib tsoo qhov tob feem ntau yog {{0}}}002 ~ 0.010mm, lub workpiece ceev feem ntau yog 10 ~ 30m / min, thiab longitudinal pub ceev yog 0.3 ~ 1.5m / min.

Hnav khaub ncaws ntawm kev sib tsoo log nrog super nyuaj abrasive

Kev sib tsoo lub log ntawm super nyuaj abrasive feem ntau muab faib ua ob txoj kev: shaping thiab sharpening.

Shaping yog micro txiav lub log sib tsoo kom ua tiav cov duab geometric thiab qhov tseeb, thiab ua rau lub ntsej muag abrasive finely tawg los ua ib tug micro hniav;

Sharpening yog tshem tawm cov khoom sib txuas ntawm cov khoom sib tsoo, kom muaj qee qhov chaw nti ntawm cov khoom sib tsoo, thiab ua rau cov khoom sib tsoo sawv tawm ntawm tus neeg sawv cev sib tsoo, tsim ib qho kev txiav.

Super tawv abrasive log nrog ntau qhov porosity ceramic binder (xws li pob zeb diamond thiab CBN log), vim tias cov hlua khi yog xoob, feem ntau cov shaping thiab sharpening tuaj yeem ua tiav ib zaug.

Binder rau tuab xuab zeb log (xws li resin, hlau binder), ces shaping thiab trimming whisker feem.

Qhov zoo tshaj plaws shaping cuab tam rau superhard abrasive log yog pob zeb diamond hnav cov cuab yeej.

Vim yog hnav cov cuab yeej hnav khaub ncaws, qhov tseeb ntawm pwm nto feem ntau cuam tshuam los ntawm ib qho khoom siv pob zeb diamond hnav khaub ncaws.

Yog tias siv pob zeb diamond log hnav, cov cuab yeej hnav khaub ncaws tuaj yeem zam kom hnav sai dhau, thiab kev sib tsoo log zoo dua tuaj yeem tau txais.

Kev pub mis rau kev hnav khaub ncaws yuav tsum siab, thiab txhua qhov pub yuav tsum tau tswj hauv qib micron.

Kev hnav khaub ncaws ntau dhau yuav tsis tsuas yog cuam tshuam rau kev sib tsoo zoo, tab sis kuj txo qis kev pabcuam lub neej ntawm kev sib tsoo log.

Muaj ntau txoj hauv kev ntawm kev ua kom zoo, feem ntau yog siv cov tshuab (xws li corundum thaiv txiav sharpening, hydraulic dav hlau sharpening) los yog hluav taws xob machining.

Cov yav tas feem ntau yog siv nyob rau hauv kev sib tsoo log ntawm hlau bonding tus neeg saib xyuas. Lub log sib tsoo yog siv los ua lub anode tshem tawm cov hlau sib txuas los ntawm hluav taws xob los yog electrolysis.

Yog tias graphite hmoov ntxiv rau hauv daim ntawv khi, txoj kev no kuj tseem tsim nyog rau cov khoom siv thiab cov khoom sib tsoo ceramic.

Nyob rau hauv xyoo tas los no, lub pob zeb diamond sib tsoo lub khob log hnav cov cuab yeej tau tsim nyob rau hauv University of Tokyo.

Lub tshuab yog ua kom siv cov abrasive ntog tawm lub khob lub log los cuam tshuam tus choj kev sib txuas ntawm cov tawv tawv (pob zeb diamond lossis CBN) abrasive hais thiab cov ntawv khi, nrog rau cov extruding thiab sib tsoo cov nyhuv ntawm abrasive ntog tawm thiab super. nyuaj log kom ua tiav lub hom phiaj ntawm kev hnav khaub ncaws.

Siv txoj kev no, tsis muaj teeb meem rau ntau qhov pore ceramic binder superhard sib tsoo lub log los yog cov xuab zeb ntom ntom, qhov shaping thiab sharpening tuaj yeem ua tiav ib zaug. Nyob rau tib lub sijhawm, vim tias nws tus kheej tig ntawm lub khob lub log, qhov hnav me me, thiab lub zog shaping tuaj yeem yuav luag tsis hloov thaum lub sijhawm hnav khaub ncaws, thiab tus nqi tsawg dua li thaum hnav khaub ncaws nrog ib lub pob zeb diamond hnav khaub ncaws. cuab yeej.

Siv cov dej sib tsoo kom raug

Thaum sib tsoo superhard abrasive log, qhuav los yog ntub sib tsoo yuav siv tau.

Txawm li cas los xij, kev sib tsoo ntub dej tuaj yeem tsis tsuas yog ncua lub neej ntawm kev sib tsoo lub log, tab sis kuj tiv thaiv lub workpiece los ntawm kev sib tsoo kub.

Kev sib tsoo cov kua sib txawv yuav ua rau kev sib tsoo ntawm lub log sib tsoo sib txawv ntau zaus, txawm tias kaum zaus (jiangxi xinxing sib tsoo log WeChat ID: zgxxsl_1978 tus thawj tswj hwm kev sib tsoo huab tais hais rau koj tias qhov no yog qhov tsis saib xyuas tshaj plaws hauv kev muaj tiag).

Lub degree ntawm mechanical hnav, tshuaj erosion thiab thermal puas ntawm kev sib tsoo log yog ze ze rau cov nyhuv txias.

Txawm li cas los xij, thaum siv CBN log rau kev sib tsoo ntub dej, nws yuav tsum tau muab sau tseg tias CBN reacts nrog dej vapor thiab oxygen nyob rau hauv cov huab cua kub los tsim ammonia thiab boric acid (BN+3H2O→H3BO3+NH3. ), uas yog hu ua hydrolysis thiab yuav ceev sib tsoo log hnav.

Yog li ntawd, cov dej-soluble roj los yog aqueous daws nrog huab siab additives feem ntau yog siv los txo cov nyhuv hydrolysis.

Thaum ntub kev sib tsoo nrog cov kua sib txawv, cov txheeb ze lub neej ntawm CBN log yog txawv. Lub log lub neej txias los ntawm cov roj ntshiab yog qhov ntev tshaj plaws, los ntawm qhov txias los ntawm dej-soluble roj, thiab lub log lub neej txias los ntawm cov dej thiab cov tshuaj tiv thaiv xeb yog qhov qis tshaj.

Unconventional siv super nyuaj abrasive log

Nws feem ntau ntseeg hais tias pob zeb diamond log tsis haum rau kev sib tsoo grey cam khwb cia hlau vim muaj tshuaj lom neeg tsis zoo ntawm cov pob zeb diamond thiab hlau pawg. Txawm li cas los xij, qhov no tsuas yog tshwm sim ntawm qhov kub thiab txias.

Piv txwv li, thaum sib tsoo nrog pob zeb diamond sib tsoo log, thaum kub txog 650 degree, pob zeb diamond yuav oxidize nyob rau hauv huab cua, thaum thaum nws mus txog 700 degree ~ 800 degree, nws yuav graphitize.

Ntawm qhov kub thiab txias, cov ntaub ntawv no tsis hnov ​​​​mob rau ib leeg.

Yog li ntawd, ntev npaum li qhov tsim nyog sib tsoo ceev thiab ntub kev sib tsoo txoj kev raug xaiv thiab txaus sib tsoo kua, lub pob zeb diamond log tuaj yeem zom cov casting tag, uas tau raug pov thawj hauv kev xyaum ntau lawm.

Qhov sib tsoo piv (9600) ntawm grey hlau nrog pob zeb diamond log yog ntau dua (2700) ntawm grey hlau nrog CBN log thaum ntub sib tsoo yog siv.

Nws kuj tseem ntseeg tau tias CBN sib tsoo lub log tsis haum rau kev sib tsoo cov pa roj carbon tsawg thiab lwm cov ntaub ntawv mos, vim tias qhov sib tsoo chips tsim nyob rau lub sijhawm no yooj yim los thaiv cov kev sib tsoo.

Txawm li cas los xij, cov kev tshawb fawb tam sim no qhia tias cov khoom siv sib tsoo CBN sib tsoo lub log tuaj yeem siv los txhim kho lub log sib tsoo cov kab nrawm los tsim cov khoom sib tsoo zoo, tom qab ntawd tshem tawm cov sib tsoo chips nrog high-pressure dav hlau sib tsoo kua, thiab muab cov dej sib tsoo txaus los tiv thaiv kev txhaws. ntawm kev sib tsoo log.

Yog li ntawd, CBN sib tsoo lub log tuaj yeem zom cov pa roj carbon tsawg (hardness ntau dua 30HRC) cov khoom muag muag.

Siv lub log sib tsoo zoo tib yam yog qhov kev xaiv rau ntau qhov xwm txheej.

Cov teeb meem tshwj xeeb tsom xam.

Txawm li cas los xij, CBN sib tsoo log tsis zoo rau kev sib tsoo cov khoom siv.

Feem ntau nws tsis haum rau kev sib tsoo nyuaj alloy thiab kev sib xyaw ntawm cov tawv tawv thiab cov hlau.