Hauv kev sib tsoo, qhov kev ua tau zoo ntawm kev sib tsoo lub log ncaj qha txiav txim siab qhov ua tau zoo, zoo, thiab tus nqi. Ntau tus neeg siv feem ntau tsis meej pem thaum ntsib nrog lub ntsej muag zoo nkauj ntawm cov khoom sib tsoo: dab tsi cuam tshuam tiag tiag txiav txim siab tag nrho kev ua haujlwm ntawm lub log sib tsoo? Qhov tseeb, xaiv lub log sib tsoo tsis nyuaj; Nws qhov kev ua tau zoo tseem ceeb yog txiav txim siab los ntawm tsib lub ntsiab lus tseem ceeb: abrasive, grit loj, hardness, microstructure, thiab kev sib txuas tus neeg sawv cev. Kev nkag siab txog tsib lub ntsiab lus tseem ceeb no yuav pab koj txiav txim siab xaiv ntau dua hauv koj txoj haujlwm, ua tiav kev txhim kho zoo thiab ua haujlwm zoo hauv kev sib tsoo.
Abrasive Xaiv
Abrasives yog qhov tseem ceeb rau kev sib tsoo log txiav, ua raws li "cov hniav" ntawm lub log. Xaiv qhov zoo abrasive yog qhov tseem ceeb rau kev ua kom pom kev ua haujlwm zoo.
Common abrasives feem ntau muab faib ua peb pawg:
Corundum: Haum rau machining ntau hom hlau.Brown corundumyog qhov kev lag luam tshaj plaws thiab ntau yam, thaum dawb corundum muaj zog dua thiab tsim nyog rau kev sib tsoo precision.
Silicon Carbide: Siv los ua cov khoom tsis yog-ferrous cov ntaub ntawv uas nyuaj, nkig, los yog mos thiab tawv, xws li cemented carbide, ceramics, iav, cam khwb cia hlau, thiab tsis yog -ferrous hlau.
Pob zeb diamond: Cov khoom siv zoo tshaj plaws, tshwj xeeb tshaj yog siv los ua cov khoom siv tawv thiab tawv, xws li cemented carbide, ceramics, iav, pob zeb, thiab semiconductors.
CBN (Cubic Boron Nitride): Thib ob tsuas yog pob zeb diamond hauv hardness, tshwj xeeb yog siv rau kev ua haujlwm siab -hardness ferrous hlau, xws li cov hlau tawv, cov cuab yeej hlau, cov hlau tuag, thiab cov cua sov- cov hlau tsis muaj zog.
Grit Size Control
Grit loj yog hais txog qhov loj ntawm cov nplej abrasive, qhia tus lej. Tus lej loj qhia tias cov nplej zoo dua. Grit loj feem ntau cuam tshuam rau saum npoo roughness thiab txiav efficiency.
Coarse grit (xws li, 24 #, 36 #): Cov nplej loj abrasive, muaj zog txiav quab yuam, tshem tawm cov khoom ceev, tab sis rougher nto tiav. Haum rau roughing, deburring, thiab lwm yam kev siv uas xav tau kev ua haujlwm siab.
Nruab nrab grit (piv txwv li, 60 #, 80 #): Sib npaug txiav kev ua haujlwm thiab qhov zoo ntawm qhov chaw, ua rau nws xaiv ntau tshaj plaws. Feem ntau ib nrab- cov txheej txheem tiav tuaj yeem siv qhov grit no.
Fine grit (piv txwv li, 100 #, 120 #, 150 #): Cov nplej me me, du nto tiav, tab sis txo qis kev ua haujlwm. Haum rau kev ua tiav thiab cov txheej txheem uas yuav tsum tau ua kom zoo tshaj plaws.
Qib Hardness: Lub hardness xa mus rau ntawm no tsis yog lub hardness ntawm abrasive grain nws tus kheej, tab sis theej lub zog uas tus neeg sawv cev sib txuas adheres lub abrasive nplej rau lub sib tsoo log. Qib hardness yog qhia los ntawm cov tsiaj ntawv (G txog Z) los ntawm softest mus hardest.
Mos Sib Tsoo Log (G-K qib): Abrasive grains yooj yim tshem tawm, tsis tu ncua nthuav tawm cov ntse txiav tshiab. Haum rau kev sib tsoo cov ntaub ntawv nyuaj, raws li cov ntaub ntawv nyuaj yooj yim dull cov nplej abrasive, yuav tsum tau lub sib tsoo log kom muaj tus kheej zoo -sharpening zog. Nruab nrab- lub log sib tsoo nyuaj (L- qib P): Kev ua tau zoo tshaj plaws, haum rau feem ntau cov haujlwm ua haujlwm niaj hnub.
Lub log sib tsoo nyuaj (Q-Z qib): Abrasive grains adhered thiab tsis yooj yim detached. Tsim nyog rau kev sib tsoo cov ntaub ntawv mos (xws li txhuas thiab tooj liab) thiab kev sib tsoo profile, vim tias lub log sib tsoo yuav tsum tswj nws cov duab kom ntev.
Nco ntsoov lub hauv paus ntsiab lus yooj yim: siv cov sib tsoo mos rau cov khoom siv tawv thiab tawv sib tsoo log rau cov khoom muag. Tsis tas li ntawd, qhov loj dua qhov chaw sib cuag ntawm lub log sib tsoo thiab cov khoom ua haujlwm, lub softer lub sib tsoo log feem ntau yuav tsum tau xaiv.
Microstructure: Microstructure hais txog qhov piv ntawm cov nplej abrasive, tus neeg sawv cev sib txuas, thiab porosity hauv kev sib tsoo. Cov lej microstructure muaj li ntawm 0 txog 14, nrog cov lej siab dua qhia tias lub log porous thiab tsawg dua.
Compact microstructure (tus naj npawb microstructure qis, xws li # 3): Cov nplej siab abrasive suav, tsis muaj porosity, ua rau lub log sib tsoo. Hom lub log no yog hnav- tiv taus, tswj nws cov duab zoo, thiab tsim nyog rau kev sib tsoo thiab kev sib tsoo profile.
Nruab nrab microstructure (nruab nrab microstructure tooj, xws li # 5): Hom kev siv ntau tshaj plaws, muab kev ua haujlwm sib luag thoob plaws lub rooj tsavxwm.
Loose Structure
(Cov qauv ntau dua, piv txwv li, Tsis yog. 8): Ntau qhov pores, kuj tsawg dua cov nplej. Hom kev sib tsoo lub log no muaj qhov chaw loj nti thiab cov cua kub zoo, haum rau siab - txiav- ntim cov khoom sib tsoo thiab cov khoom siv ua kom yooj yim rau lub log, xws li stainless hlau thiab titanium alloys.
Thaum cov khoom siv machining nquag "ua kom", xaiv cov qauv xoob sib tsoo lub log yog qhov tseem ceeb los tiv thaiv kev txhaws thiab hlawv.
Hom Bond
Daim ntawv cog lus yog cov khoom siv uas khi suav suav tsis txheeb abrasive nplej ua ke los tsim lub log sib tsoo tag nrho. Nws txiav txim siab cov yam ntxwv tseem ceeb ntawm kev sib tsoo lub log.
Ceramic Bond
(Code V): Feem ntau siv, kub resistant, zoo rigidity, tab sis kuj nkig. Haum rau feem ntau cov txheej txheem sib tsoo.
Resin Bond
(Code B): Nws muaj qee qhov elasticity, tuaj yeem nqus kev co, haum rau kev tsim cov ntawv txiav, polishing log, thiab rau kev sib tsoo zoo.
Hlau Bond
(Code M): Lub zog sib txuas siab tshaj plaws, feem ntau yog siv rau kev tsim cov pob zeb diamond, CBN, thiab lwm yam superhard abrasive log, nrog rau kev pab lub neej ntev.
Yuav siv li cas hauv kev sib xyaw
Tsib lub ntsiab lus yuav tsum tau ua haujlwm ua ke kom ua tiav cov txiaj ntsig zoo tshaj plaws. Siv cov txheej txheem ntawm cov hlau ferrous ua piv txwv, ntawm no yog qee qhov kev sib xyaw ua ke:
Rau siab -efficiency roughing:
Kev sib xyaw ua ke ntawm xim av fused alumina (abrasive), 46 # grit, K qib (softer hardness), thiab 7-8 grit (cov qauv xoob) tuaj yeem xaiv, tsom rau kev tshem tawm cov khoom sai.
Rau siab - ua tiav zoo:
Kev sib xyaw ua ke ntawm dawb fused alumina (abrasive), 120 # grit (zoo grit), N qib (nyuaj hardness), thiab 3-4 grit (nruj qauv) tuaj yeem xaiv, tsom rau kom tau txais qhov chaw du thiab cov duab meej.
Rau machining nyuaj-rau- cov khoom sib tsoo (xws li stainless hlau):
Kev tsom mus rau kev ua kom sov thiab tiv thaiv - clogging, ib zaug - siv lead ua fused alumina (abrasive), 60# grit, ib qho tawv tawv, thiab cov qauv xoob (xws li 8 grit) yuav tsum tau xaiv.
Cov tswv yim tswv yim rau cov neeg siv:
Pib nrog kev daws teeb meem dav dav:
Yog tias tsis paub meej, koj tuaj yeem sim ua ke ntawm "xim av fused alumina, 80 # grit, L qib hardness, 5 grit qauv, thiab ceramic binder," uas tuaj yeem daws tau ib feem tseem ceeb ntawm cov teeb meem machining.
Tsim kom muaj kev sib txuas ntawm cov teeb meem thiab kev hloov kho:
Rau qhov chaw ua haujlwm kub hnyiab, sim txo qhov sib tsoo lub log hardness lossis siv cov qauv ntxeem tau ntau dua.
Rau kev sib tsoo log hnav uas nrawm dhau, sim ua kom lub log sib tsoo hardness.
Rau qhov chaw ntxhib, sim siv cov grit zoo dua lossis hnav lub log sib tsoo tam sim.
Xav txog kev lag luam: Tsis txhob ua qhov muag tsis pom qhov ua tiav. Thaum ua tau raws li qhov yuav tsum tau ua rau lub ntsej muag du, xaiv qhov coarsest tau grit los txhim kho kev sib tsoo.
Kev xaiv lub log sib tsoo qhov tseem ceeb yog nrhiav kev sib xyaw ua ke ntawm tsib lub ntsiab lus: abrasive, grit loj, hardness, microstructure, thiab kev sib txuas tus neeg sawv cev, raws li koj cov khoom siv ua haujlwm, kev ua haujlwm, thiab cov khoom siv. Nkag siab lub ntsiab lus thiab kev ua haujlwm ntawm txhua lub ntsiab lus thiab nkag siab lub ntsiab lus ntawm lawv cov kev sib txuas. Nco ntsoov, tsis muaj "ib qho- loj- haum-tag nrho" kev sib tsoo log, tsuas yog "tsim" sib tsoo log nyob rau hauv tej yam kev mob.
Peb yog cov chaw tsim khoom los ntawm Tuam Tshoj ua cov xim av thiab dawb corundum abrasives. Peb tuaj yeem daws koj cov kev xav tau ntawm lub log abrasive, feem ntau yog rau cov khoom siv ceramic thiab cob-raws li abrasive log. Zoo siab txais tos los tham txog kev koom tes. Yog tias koj muaj kev xav tau, thov hu rau peb, thiab peb yuav muab koj cov khoom tsim nyog rau koj cov kev xav tau, pab koj txo nqi thiab txhim kho kev ua haujlwm.
