Tsim thiab siv cov khoom siv sib txuas nrog lub log

1. Taw qhia rau pob zeb diamond sib tsoo log

Resin binder superhard khoom cov cuab yeej yog tsim los ntawm pob zeb diamond los yog CBN li abrasive, resin hmoov raws li binder, nrog rau cov ntaub ntawv uas tsim nyog ntxiv, thiab tom qab formulation tsim, hnyav sib tov, kub nias, theem ob curing, tom qab ua thiab lwm yam txheej txheem, uas muaj feem xyuam rau. sib txawv sib tsoo yuav tsum
Piv nrog ceramic binder lossis hlau binder, nws muaj cov yam ntxwv ntawm cov txheej txheem tsim khoom yooj yim, nkag tau yooj yim rau cov ntaub ntawv raw, tsis tshua muaj nqi, thiab tuaj yeem siv rau ntau qhov tsis zoo super hard abrasive, cov khoom siv dav dav, xws li txhua yam. ntawm nyuaj rau txheej txheem steel, nyuaj alloy, iav, ceramics, pob zeb, thiab lwm yam.
Resin superhard abrasive cov cuab yeej siv dav siv vim tias lawv muaj qhov zoo ntawm tus kheej ntse thiab tsis yooj yim rau ntsaws rau hauv cov txheej txheem sib tsoo, thiab cov khoom ua haujlwm muaj qhov zoo ntawm qhov zoo thiab lub log sib tsoo yog yooj yim hnav.

Resin binder siv rau hauv cov cuab yeej pob zeb diamond tuaj yeem muab faib ua ob pawg: phenolic resin thiab polyimide resin. Qhov tseeb ua haujlwm kub ntawm phenolic cob pob zeb diamond cov cuab yeej tsis ntau tshaj 120 degree. Polyimide resin muaj cov cua kub zoo dua thiab tuaj yeem siv tau ntev ntawm 260 degree.
Nrog cov khoom kim heev polyimide Resins, phenolic Resins tau siv ntau ntxiv, tshwj xeeb tshaj yog nyob rau xyoo tas los no nrog cov kws tshawb fawb tau hloov kho phenolic Resins los ua qhov ua haujlwm kub ntawm ntau tshaj 200 degree C, xws li 939P los ntawm Advanced Mixed Limited ntawm UK.

Daim ntawv no tsuas yog qhia txog lub tswv yim tsim thiab cuam tshuam ntawm cov cuab yeej pob zeb diamond resin.

2. Tsim cov khoom siv cob pob zeb diamond

Kev tsim cov khoom siv pob zeb diamond cob pob zeb yog tsim los ntawm tsib yam nram qab no:
(1) Adhesion yuav tsum zoo.
Lub binder tuaj yeem muab faib ua tus sib npaug ntawm qhov chaw abrasive, cov khoom abrasive tuaj yeem ruaj khov hauv cov cuab yeej abrasive, thiab tuaj yeem ruaj khov rau hauv matrix, uas tsis tsuas yog ua rau cov abrasive tsis yooj yim kom poob ntxov ntxov, tab sis kuj tiv thaiv cov binder. los ntawm kev sib cais los ntawm matrix, ua kom muaj kev ruaj ntseg ntau lawm.
(2) High sib tsoo efficiency, zoo hnav tsis kam, zoo tiav (los yog nto roughness) ua.
Resin daim ntawv cog lus vim elasticity thiab brittleness, yog li nyob rau hauv kev sib tsoo tus kheej-sharpening, tsis yooj yim rau ntsaws, tab sis tsis hnav tsis kam.
Yog li ntawd, thaum peb kawm thiab tsim cov binder formula, peb yuav tsum xav txog nyob rau hauv lub hauv paus ntsiab lus ntawm kev ua kom lub smoothness yuav tsum tau, tsis tsuas yog kom muaj kev sib tsoo siab efficiency, tab sis kuj yuav tsum muaj siab hnav tsis kam raws li qhov ua tau.
Kev npaj ntawm binder yog qhov tseem ceeb. Qhov piv ntawm binder yuav tsum raug xaiv kom ua tau raws li ob qho tib si kev sib tsoo siab thiab kev hnav zoo, thiaj li ua kom cov kev xav tau ntawm kev sib tsoo thiab txo tus nqi.
(3) Ua haujlwm kub zoo.
Yog hais tias lub tshav kub tsis kam ntawm lub binder yog tsis zoo, yog li ntawd lub abrasive nyob rau hauv tus txheej txheem ntawm kev siv yog tsis resistant rau high kub, ceev noj, thiab txawm vim hais tias lub sib tsoo kub yog siab dhau heev lawm, yog li ntawd lub abrasive hlawv, tawg, nplhaib, thiab lwm yam. ., yog li xaiv cov khoom siv hluav taws xob zoo thiab ntxiv cov muab tub lim kom tsim nyog, txhawm rau txhim kho nws cov cua sov;
(2) Siv cov dej txias rau kev sib tsoo ntub kom deb li deb tau txhawm rau txhim kho lub zog ntawm cov cuab yeej sib tsoo;
(3) Yog tias siv cov khoom sib tsoo qhuav, ua kom cov khoom noj me me li sai tau los txhim kho lub zog ntawm cov cuab yeej sib tsoo.
(4) Binder zog yuav tsum siab.
Lub zog ntawm cov ntawv khi ncaj qha cuam tshuam rau kev sib tsoo ua haujlwm, qhov loj ntawm qhov tawg, qhov ua haujlwm zoo thiab kev nyab xeeb ntawm cov cuab yeej sib tsoo hauv cov txheej txheem siv, yog li nws yog qhov yuav tsum tau nkag siab txog yam tseem ceeb uas cuam tshuam rau lub zog binder.
 

Cov yam tseem ceeb uas cuam tshuam rau lub zog ntawm lub binder yog:

(1) qhov sib ntxiv ntawm fillers yuav nce los yog txo lub zog ntawm lub binder. Feem ntau ntawm cov fillers yuav ua rau cov neeg kho tshuab muaj zog thiab nce nrog qhov nce ntawm cov khoom muab tub lim nyob rau hauv ib qho chaw, tab sis qhov hnav piv yuav txo.
Qee qhov muab tub lim, xws li graphite thiab cov khoom molybdenum disulfide, tom qab ntxiv lub zog yog txo, yog li raws li cov kev xav tau ntawm kev xaiv tsim nyog ntawm muab tub lim;
(2) Kev sib sau ntom ntom ntawm cov abrasive (lossis qhov porosity ntawm abrasive) yuav cuam tshuam rau lub zog ntawm cov ntawv khi.
Cov kev sib sau ua kom ntom ntawm cov abrasive yog tsawg, lub porosity yog siab, thiab lub zog ntawm phau ntawv yog tsawg, hos lub zog ntawm binder yog siab.
Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau rationally tsim qhov tsis muaj porosity ntawm cov cuab yeej abrasive.
(3) Lub hardening kub, thib ob hardening kub thiab kub nce nkhaus ntawm lub abrasive molding yuav cuam tshuam lub zog ntawm lub binder.
Binder hardness yuav tsum tsim nyog, zoo hnav tsis kam.
Lub zog ntawm lub binder yuav tsum phim qhov hnav ceev ntawm pob zeb diamond (los yog cBN) abrasive hais. Cov khoom abrasive yuav tsum tsis txhob poob ntxov vim qhov hnav ceev ntawm cov ntaub ntawv. Nyob rau hauv tas li ntawd, lub abrasive yuav tsis siv tag nrho, ua rau pov tseg.

3. Kev cuam tshuam ntawm cov khoom siv pob zeb diamond resin

Resin pob zeb diamond cov cuab yeej yog ua los ntawm resin binder, muab tub lim thiab pob zeb diamond abrasive tom qab sib tov thiab kho los ntawm kub nias.

Nws cov khoom kuj tseem cuam tshuam ncaj qha los ntawm cov khoom siv cob, muab tub lim thiab pob zeb diamond abrasive.

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

(1) cov yam ntxwv ntawm txhua yam khoom siv pob zeb diamond cov cuab yeej yog cov cua sov tsis zoo, nyob rau hauv cov txheej txheem ntawm machining, cov cuab yeej pob zeb diamond thiab cov khoom ua haujlwm nruab nrab ntawm cov cua sov uas tsim los ntawm lub zos kub tau yooj yim, ib zaug mus txog qhov tseem ceeb, tuav ntawm pob zeb diamond resin binder, pob zeb diamond nyob rau hauv cov xwm txheej ntawm tsis tag dull yuav ntog, kom lub machining nqi nce heev.

Tam sim no, cov resin binder tau hloov kho los txhim kho nws cov cua sov.

Gao Liangchang hloov kho phenolic resin nrog square alkyl ether, thiab nws cov cua sov kuj tuaj yeem ncav cuag 180 degree.

Du Yang et al. synthesized borosilicone prepolymer, boric acid, phenol thiab formaldehyde raws li raw cov ntaub ntawv ntawm cov tshiab borosilicone phenolic resin BSP, vim hais tias cov kev taw qhia ntawm BO daim ntawv cog lus thiab organic silicon saw nyob rau hauv lub phenolic resin qauv, BSP resin muaj zoo heev tshav kub kuj thiab toughness, tab sis kuj txhim kho. cov dej tsis kam thiab cia stability ntawm cov resin.

Xiao Dongzheng et al. siv BMI (bismaleimide) los hloov kho phenolic resin, thiab tau txais bismaleimide hloov kho 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.

Monocrystalline silicon hlais tau qhia nyob rau hauv cov ntaub ntawv thinning sib tsoo log, resin binder cov ntsiab lus tau nce, lub hardness ntawm kev sib tsoo log, lub compressive zog maj mam nce, thaum cov resin binder cov ntsiab lus nce mus rau ib tug tej yam degree, siab tshaj li ntawm cov sib tsoo log hnav zoo li. qeeb, qhov sib tsoo lub log nto nws tus kheej los thaiv qhov tshwm sim tib lub sijhawm, cov ntsiab lus siab dua nyob rau tib lub sijhawm, qhov loj dua qhov thaiv qhov tshwm sim.

(3) Kev cuam tshuam ntawm resin binder loj.

Qhov luaj li cas ntawm cov hmoov resin siv nyob rau hauv zus tau tej cov pob zeb diamond abrasives nyob rau hauv Tuam Tshoj yog feem ntau ntawm 80 ~ 180 mesh. Muaj ob qhov tsis xws luag hauv qhov loj me no, ib qho yog tias nws cuam tshuam rau kev tsim cov khoom ntawm abrasives, lwm qhov yog tias nws tuaj yeem cuam tshuam cov khoom ntawm binder.

Nyob rau hauv tus txheej txheem ntawm kev tsuj, tsob ntoo hmoov tuaj yeem ua kom sov kom soften, thiab muaj qee yam dej, ua tiav lub hom phiaj ntawm coated abrasive, tab sis nyob rau hauv cov txheej txheem ntawm kev tsuj, cov ntaub ntawv binder yog lub siab nyob rau hauv cov pwm, qhov chaw yog txwv, cov resin flow range. yog txwv, thaum tsob ntoo tuab hmoov particle loj, yuav muaj ib feem ntawm cov abrasive binder tsis muaj zog, uas poob sai heev.

3.3 Kev cuam tshuam ntawm pob zeb diamond abrasive feem ntau suav nrog kev cuam tshuam ntawm pob zeb diamond txheej, hom thiab particle loj, thiab lwm yam.

(1) Tom qab lub pob zeb diamond nto yog coated nrog hlau, lub zog compressive ntawm ib qho yog txhim kho, thiab qhov hnav piv yog txo, uas txuas ntxiv lub neej kev pab cuam.

Piv nrog tsis muaj plating pob zeb diamond, kev ua haujlwm tshwj xeeb suav nrog cov hauv qab no:

(1) txheej qeeb cua sov pulse ntawm resin daim ntawv cog lus pob zeb diamond txheej thermal conductivity yog me dua lub pob zeb diamond, yog li tiv tauj cov cuab yeej, pob zeb diamond grits ntawm kub kub instantaneous tom qab plating rau cov resin, yog li tiv thaiv tam sim abrasive qhov chaw ntawm resin tsis cuam tshuam los ntawm kub kub. kev puas tsuaj;

(2) txheej txheej los txhim kho lub zog sib txuas ntawm pob zeb diamond thiab binder, hlau txheej nrog pob zeb diamond sab hauv, sab nraud thiab cob khi tuaj yeem ua tau zoo;

(3) txheej txheej los txhim kho lub pob zeb diamond particle crushing lub zog, plated hlau tom qab lub pob zeb diamond particle defects raug tsim, ua lub luag hauj lwm reinforcing, thiab txheej muaj ductile hlau, yog tsim nyog los txhim kho particle crushing zog;

(4) Cov txheej txheej ntawm cov khoom abrasive ua lub luag haujlwm tiv thaiv kev sib cais, kev sib cais ntawm cov pa oxygen thiab lwm yam teeb meem kev tshaj tawm, tib lub sijhawm hauv kev sib tsoo kub, txheej txheej ntawm graphitization ntawm pob zeb diamond siv lead ua tuaj yeem ua rau muaj kev cuam tshuam.

(2) Cov tuam txhab tsim khoom hauv tsev thiab txawv teb chaws tau ua cov ncauj lus kom ntxaws txog kev faib tawm ntawm superhard abrasive, ntawm cov uas tsis tshua muaj pob zeb diamond abrasive lossis pob zeb diamond abrasive nrog siab tus kheej ntse thiab micro-crushing khoom kho los ntawm cov cuab yeej tshwj xeeb yog siv hauv kev npaj ntawm cov cuab yeej siv pob zeb diamond.