Cov yam ntxwv cuam tshuam rau kev ua tau zoo ntawm Resin-bonded Pob Zeb Diamond cuab yeej

Resin pob zeb diamond cov cuab yeej yog ua los ntawm cov khoom siv cob, cov khoom ntim thiab cov pob zeb diamond abrasives sib xyaw thiab tom qab ntawd kho los ntawm kev kub nias. Nws qhov kev ua tau zoo kuj tseem cuam tshuam ncaj qha los ntawm resin binders, fillers thiab pob zeb diamond abrasives.

1 Kev cuam tshuam ntawm binders feem ntau suav nrog kev cuam tshuam ntawm binder hom thiab cov ntsiab lus, thiab lwm yam.

(1) Cov yam ntxwv ntawm txhua yam ntawm cov khoom siv pob zeb diamond sib tsoo yog cov cua sov tsis zoo. Thaum lub sij hawm ua cov khoom ua haujlwm, cov cua sov tsim los ntawm cov cuab yeej pob zeb diamond thiab cov khoom ua haujlwm yog ib qho yooj yim ua rau lub zos kub siab dhau. Thaum tus nqi tseem ceeb tau mus txog, kev tswj hwm ntawm cov pob zeb diamond cob pob zeb yuav tsis ua haujlwm, thiab lub pob zeb diamond yuav poob tawm yam tsis muaj kev sib tsoo tag nrho thiab bluntness, yog li ua rau cov nqi ua haujlwm zoo heev. Tam sim no, txoj hauv kev tseem ceeb los txhim kho cov cua sov ua haujlwm yog hloov kho cov ntaub ntawv cob. Gao Liangxuan [3] Hloov kho phenolic resin nrog square alkyl ether, nws qhov kub tsis kam tuaj yeem ncav cuag 180C. Du Yang et al. [4] Ib qho tshiab borosilicate-muaj phenolic resin BSP tau tsim los ntawm organosilicon prepolymer, boric acid, phenol thiab formaldehyde. Vim qhov kev taw qhia ntawm BO daim ntawv cog lus thiab cov organic silicon saw hauv cov qauv ntawm phenolic resin, BSP resin muaj cov cua sov zoo thiab tawv, thiab tseem txhim kho cov dej tsis kam thiab ruaj khov ntawm cov cob. Xiao Dongzheng et al. [5] Hloov kho phenolic resin nrog BMI (bismaleimide) tau txais phenolic resin nrog cov cua sov zoo.
(2) Kev cuam tshuam ntawm resin binder cov ntsiab lus. Cov ntsiab lus resin binder muaj kev cuam tshuam zoo rau kev ua haujlwm ntawm cov cuab yeej pob zeb diamond. Cov ntawv nyeem [24] tau qhia tias nyob rau hauv ib qho siv lead ua silicon wafer nyias sib tsoo lub log, cov ntsiab lus ntawm resin binder nce, lub hardness thiab compressive zog ntawm lub sib tsoo log nce maj mam. Thaum cov ntsiab lus ntawm resin binder nce mus rau ib qho twg, qhov nce ntawm kev sib tsoo log coj piv yuav qeeb. Nyob rau tib lub sij hawm, nto ntawm kev sib tsoo log yog nquag mus rau blockage. Cov ntsiab lus siab dua, qhov hnyav dua qhov thaiv.
(3) Kev cuam tshuam ntawm particle loj ntawm resin binder. Resin hmoov ua nyob rau hauv Tuam Tshoj li pob zeb diamond abrasives feem ntau muaj particle loj ntawm 80 thiab 180 mesh. Muaj ob qhov tsis xws luag nyob rau hauv no grain loj ntau yam, ib tug yog hais tias nws cuam tshuam lub compaction formability ntawm abrasives, lwm yam yog hais tias nws yuav cuam tshuam rau cov khoom ntawm binders. Thaum lub sij hawm nias, txawm hais tias cov hmoov resin tuaj yeem softened los ntawm tshav kub thiab muaj qee yam fluidity kom ua tiav lub hom phiaj ntawm txheej abrasive hais, thaum lub sij hawm nias, lub binder yog nias rau hauv qhov tuag nrog qhov chaw tsawg thiab qhov ntws ntawm cov resin yog txwv. Thaum cov particle loj ntawm cov hmoov resin yog ntxhib, qee cov abrasive bonds tsis muaj zog thiab poob sai heev. Qee cov kev tshawb fawb tau pom tias thaum cov resin granularity yog refined, nws tuaj yeem txhim kho cov fluidity ntawm cov khoom tsim thiab pab txhawb qhov kub-nias ntawm cov cuab yeej abrasive.

2 Kev cuam tshuam ntawm kev muab tub lim feem ntau suav nrog cov txiaj ntsig ntawm cov khoom ntim thiab cov ntsiab lus, thiab lwm yam.

Filler yog ib feem tseem ceeb ntawm pob zeb diamond sib tsoo cov cuab yeej. Ntxiv cov khoom muab tub lim kom zoo tuaj yeem tsis tsuas yog txo tus nqi zoo heev, tab sis kuj tseem txhim kho cov cuab yeej siv zog thiab ua kom ntev kev pab cuam lub neej ntawm cov cuab yeej sib tsoo.
(1) Muaj ntau ntau hom fillers, thiab ntau hom fillers muaj qhov sib txawv ntawm cov cuab yeej abrasive. Nws tuaj yeem muab faib ua plaub pawg raws li nws qhov xwm txheej thiab siv:
1. Inactive muab tub lim. Siv nyob rau hauv cov txheej txheem plasticizable los txo cov nqi abrasive;
(2) Active muab tub lim. Cov nyhuv plasticizing thiab adsorbing pab txhim kho kev sib koom ua ke ntawm cov khoom abrasive thiab binders.
3. Reinforcement muab tub lim. Piv txwv li, iav fibers, carbon fibers, thiab lwm yam, nrog rau lub hom phiaj ntawm kev ua kom lub zog ntawm cov binder;
4. Txo lub zog ntawm cov binder muab tub lim. Ua cov cuab yeej sib tsoo tsim nyog rau cov cuab yeej xov.
Nyob rau hauv cov khoom siv abrasive ntawm cov khoom siv tawv tawv, nws txoj haujlwm yog tsuas yog los txhim kho cov cua sov, hardness thiab lub zog ntawm cov ntaub ntawv, nrog rau lub hom phiaj kawg ntawm kev txhim kho nws cov kav ntev. Muaj ntau ntau hom fillers. Rau pob zeb diamond resin abrasives thiab phenolic resin binders, Cr2O3, ZnO thiab Cu hmoov yog cov khoom siv hauv Suav teb. Ntxiv rau Cu hmoov, cov khoom ntim rau polyimide binder yog siv txawv teb chaws rau kev sib tsoo qhuav nrog Zr, Co, CaCO3, thiab lwm yam thiab rau kev sib tsoo ntub nrog cov ntaub ntawv ceramic xws li SiO2 thiab Al2O3.

3 Kev cuam tshuam ntawm pob zeb diamond abrasive feem ntau suav nrog kev cuam tshuam ntawm pob zeb diamond txheej, hom thiab grain loj.

(1) Tom qab lub pob zeb diamond nto yog coated nrog hlau, lub zog compressive ntawm ib feem yog nce thiab hnav piv yog txo, uas txhais tau hais tias lub neej kev pab cuam lub neej ntev. Piv nrog cov pob zeb diamond uas tsis yog-coated, cov haujlwm tshwj xeeb muaj xws li cov hauv qab no: 1) txheej ua kom lub thermal pulse mus rau cov resin binder thiab thermal conductivity ntawm cov pob zeb diamond txheej yog me dua li cov pob zeb diamond, yog li qhov kub siab instantaneous generated. thaum lub pob zeb diamond abrasive tiv tauj lub cuab yeej hloov mus rau cov resin tom qab txheej, yog li tiv thaiv cov resin ze rau abrasive los ntawm kub kub puas; 2. Lub plating txhim kho lub zog sib txuas ntawm pob zeb diamond thiab binder; cov hlau plating yog coated nrog pob zeb diamond nyob rau hauv lub puab txheej thiab txheej txheej bonds zoo nrog cov resin binder; 3. Lub plating txhim kho lub zog crushing ntawm pob zeb diamond hais, thiab qhov tsis xws luag ntawm pob zeb diamond hais yog them nyiaj tom qab hlau plating, uas plays lub luag hauj lwm reinforcing. Ntxiv mus, cov plating muaj cov hlau tawv, uas yog qhov zoo rau kev txhim kho lub zog crushing ntawm pob zeb diamond hais; Lub plating ua raws li kev sib cais thiab kev tiv thaiv tawm tsam abrasive hais, oxygen thiab lwm yam kev phom sij. Nyob rau tib lub sijhawm, ntawm kev sib tsoo kub, cov plating tuaj yeem cuam tshuam cov graphitization ntawm pob zeb diamond siv lead ua.
(2) Ultra-hard abrasives raug cais tawm hauv kev nthuav dav los ntawm cov tuam txhab lag luam hauv tsev thiab txawv teb chaws super-hard khoom, uas tsis tshua muaj pob zeb diamond abrasives lossis pob zeb diamond abrasives nrog siab tus kheej ntse thiab micro-breakability kho los ntawm cov txheej txheem tshwj xeeb yog siv rau kev npaj. ntawm pob zeb diamond resin-bonded cuab yeej. Piv txwv li, cov pob zeb diamonds ntawm PDA433, PDA321, PDA311 thiab PDA211 hom uas muab los ntawm E6 Lub Tuam Txhab muaj lub siab tus kheej ntse thiab micro-breakability. Tam sim no, RVD pob zeb diamond abrasive yog dav siv nyob rau hauv domestic resin pwm, nrog koob zoo li hais, tsis zoo siv lead ua zoo, tsis muaj zog, brittleness, ntxhib nto tab sis ntse sib tsoo, thiab zoo ua ke nrog resin binder. Nyob rau hauv xyoo tas los no, polycrystalline CSD pob zeb diamond abrasive tau tsim nyob rau hauv Suav teb rau cov khoom siv sib txuas ua ke, uas ua rau muaj txiaj ntsig zoo ntawm cov cuab yeej pob zeb diamond.

4 Cov txiaj ntsig ntawm kev ua tiav ntawm pob zeb diamond sib tsoo log

Cov txheej txheem hnav khaub ncaws yog ib qho tseem ceeb hauv kev npaj ntawm kev sib tsoo log. Resin pob zeb diamond sib tsoo lub log ntawm ntau yam duab tuaj yeem tau los ntawm kev hnav khaub ncaws. Resin bonded pob zeb diamond sib tsoo log nto pob zeb diamond yog txiav los ntawm kev sib tsoo log sharpening. Kev hnav khaub ncaws zoo ncaj qha cuam tshuam rau kev ua haujlwm ntawm kev sib tsoo log. Zou Dacheng tau tsim ib txoj kev hnav khaub ncaws pob zeb diamond tshiab, thiab ua cov kev sim hnav khaub ncaws nrog dawb corundum, silicon carbide, boron carbide, molybdenum thiab ferromolybdenum alloys. Los ntawm kev sib piv thiab tshuaj xyuas lub zog hnav khaub ncaws, qhov tseeb ntawm qhov chaw morphology, lub ntsej muag lub ntsej muag lub ntsej muag thiab kev sib tsoo ntawm txhua txoj hauv kev, kev hnav khaub ncaws los ntawm kev hnav khaub ncaws sib txawv ntawm cov pob zeb diamond log tau muab piv. Xaiv cov cuab yeej kho kom haum rau kev siv tswv yim yuav pab txhim kho kev ua haujlwm ntawm pob zeb diamond sib tsoo log.