Valve sib tsoo pastes. Qhov twg xaiv?

Vim li cas thiaj grind li qub?

Lapping yog ib yam ntawm polishing, thaum abrasive hais, ntog ntawm qhov sib txawv hardness, yog embedded nyob rau hauv ib tug softer khoom. Raws li qhov tshwm sim, qhov kev huv ntawm qhov chaw ntawm cov khoom siv tawv tawv hauv ib qho kev sib txhuam ua ke nce. Lapping compounds yog dav siv nyob rau hauv kev xyaum ntawm nws pib kho kom tau qhov tseeb mating ntawm lub angular qhov ntev ntawm lub valve thiab lub rooj. Rau qhov zoo lapped li qub, qhov chaw tiv tauj thaj tsam kwv yees li ob npaug.

High-quality lapping ntawm li qub yog li daws ob qho teeb meem:

• Tsim kom muaj kev sib khi zoo dua ntawm lub valve thiab lub taub hau, uas yuav tiv thaiv cov pa roj los ntawm kev khiav tawm thaum lub sij hawm compression stroke.
• Tiv thaiv kev kub nyhiab ntawm cov li qub, txij li qhov chaw sib txuas ntxiv tau muab cov cua sov zoo dua los ntawm cov li qub mus rau lub taub hau.

Lapping yog nqa tawm los ntawm kev siv ib qho tshwj xeeb muaj pes tsawg leeg - lapping muab tshuaj txhuam rau li qub - rau cov npoo ntawm li qub, ua raws li lawv cov kev sib hloov ntawm lub taub hau.

Cov muaj pes tsawg leeg ntawm kev sib tsoo muab tshuaj txhuam

Cov khoom tseem ceeb ntawm valve lapping pastes yog:

1. Cov roj uas ua kom muaj peev xwm ua kom sov thiab txo qhov kub ntawm qhov chaw lapped. Qee cov pastes, txhawm rau txo cov viscosity, yog tsim los ntawm dej.
2. Finely dispersed abrasive rau polishing.
3. Antioxidants uas txo mechanochemical hnav.
4. Corrosion inhibitors uas muaj txiaj ntsig zoo rau kev ua haujlwm ntawm lub valve.
5. Illuminating compounds.

Qhov ua tau zoo ntawm txhua qhov muab tshuaj txhuam rau cov li qub yog txiav txim siab los ntawm hom abrasive. Carborundum, pob zeb diamond grit, silicon dioxide, iav, aluminium oxide, nrog rau silicon thiab boron carbides yog siv.

Lapping muab tshuaj txhuam rau li qub yog cais los ntawm ntxhib mus rau nplua. Nyob rau hauv ntxhib muab tshuaj txhuam, cov abrasive hais yog loj txaus, yog li nws yog siv rau ntxhib lapping. Qhov siab dua qhov grit loj ntawm lapping paste, qhov zoo dua qhov lapping tuaj yeem ua nrog nws.

Roj thiab kev sib tsoo muab tshuaj txhuam muaj qhov sib txawv: thaum lub abrasive nce kev sib txhuam, cov roj zoo li txo nws, thaum txo qhov kev txiav txim. Roj (los yog dej) kuj yog lub hauv paus uas cov khoom abrasive txav thaum lapping.

Qee cov neeg siv arbitrarily txo qhov pib viscosity ntawm cov muab tshuaj txhuam, uas yog tsis tsim nyog: vim li ntawd, lub loading quab yuam thiab txiav cov nyhuv ntawm abrasive hais rau lub lapped nto yog txo. Cov khoom lawv tus kheej raug ntxuav tawm sai dua, uas ua rau muaj kev nce hauv kev noj cov lapping compound.

Lapping nta

Txawm hais tias lub hom phiaj ntawm lub valve lapping paste, koj yuav tsum ua raws li cov lus pom zoo hauv qab no:

1. Ua ntej pib ua haujlwm, nws yog ib qho tsim nyog yuav tsum nias lub lapped ib feem kom sib npaug li qhov ua tau rau txheej ntawm lapping muab tshuaj txhuam.
2. Lub caij yuav tsum tau lapped yuav tsum tau tas li nias thaum lub sij hawm lapping txheej txheem kom txog rau thaum muaj pes tsawg leeg tshwm nyob rau hauv qhov sib txawv ntawm qhov chaw.
3. Kev sib hloov ntawm lub puab tsaig yuav tsum tau ua kom txog rau thaum lub zog ntawm kev txav ntawm cov mating qhov chaw txo qis: qhov no qhia tau hais tias cov khoom abrasive yog nyem tawm ntawm qhov chaw ua haujlwm, thiab tsuas yog muaj roj lossis dej khi.
4. Yog tias lapping yuav tsum tau txuas ntxiv, qhov qub muab tshuaj tshem tawm thiab muab tshuaj txhuam tshiab yog siv.

Kev tswj kom zoo ntawm lub valve lapping hauv tsev tuaj yeem ua tau los ntawm ob txoj hauv kev - "ntawm ib tus cwj mem" thiab "ntawm kerosene". Nyob rau hauv thawj rooj plaub, mus txog rau lub cim yog siv rau saum npoo siv ib tug mos mem hluav, uas yuav tsum tau nyob rau hauv lub radial kev taw qhia. Cov hauv av yog siv, thiab 2 ... 3 lem yog ua. Yog tias qhov txaus ntshai tseem nyob, lapping yuav tsum txuas ntxiv mus. Txhawm rau txheeb xyuas "rau kerosene", cov mating qhov chaw yog so qhuav thiab muab tso rau ntawm ib daim ntawv ntawm cov ntawv dawb huv, tom qab ntawd me ntsis kerosene yog nchuav rau hauv qhov sib txawv. Yog tias tom qab 6-7 teev tsis muaj cov kab mob kerosene nyob rau sab nraud, kev sib tsoo tuaj yeem suav tias ua tiav.

yuav ua li cas sib tsoo lub valve thiab xyuas qhov zoo ntawm kev sib tsoo

Valve lapping muab tshuaj txhuam. Qhov twg zoo dua?

Cov kev ntsuam xyuas hauv qab no ntawm pastes yog muab tso ua ke los ntawm kev tawm tswv yim los ntawm cov neeg tsav tsheb lawv tus kheej:

1. "Classic" (chaw tsim tshuaj paus VMPavto, Russia). Haum rau txhua hom cav, nws muaj ob lub ntsiab lus sib xyaw, uas tso cai rau koj kom ua tau zoo sib xws thiab sib tsoo. Cov qoob loo loj yog los ntawm 0,53 mus rau 0,9 microns, thiab lawv tuaj yeem ua haujlwm maj mam, raws li qhov roughness ntawm cov chaw kho mob hloov. Nqe - los ntawm 600 rubles. rau 400 g ntawm cov khoom. Nws yuav tsum tau muab sau tseg tias VMPAuto tsim tshwj xeeb pastes nyob rau hauv tib lub hom - pob zeb diamond thiab cov kws tshaj lij, uas tsim nyog, feem, tsuas yog rau diesel thiab roj cav. Tus nqi ntawm xws li pastes yog siab dua: piv txwv li, rau pob zeb diamond - los ntawm 220 rubles. ib pob 100 g.
2. ABRO Sib Tsoo GP-201 los ntawm ABRO cov cim lag luam (USA). Nws kuj muaj cov ntxhib thiab nplua-grained Cheebtsam, uas nyob rau hauv nyias qhov chaw ntawm lub thawv. Economy hauv kev noj, zoo khaws cia rau ntawm qhov chaw rubbed. Tus nqi ntawm ib pob hnyav 100 g yog los ntawm 150 rubles.

3. Cov nyhuv (tsim nyob rau hauv St. Petersburg). Cov pob no suav nrog ob lub raj mis ntxhib thiab muab tshuaj txhuam zoo, nrog rau lub tshuab xa tawm kom yooj yim rau txheej txheem lapping. Nqe - los ntawm 160 rubles. rau 90 g ntawm cov khoom.
4. Permatex (chaw tsim tshuaj paus - USA). Nws belongs rau cov pab pawg neeg ntawm cov dej-soluble pastes, uas koj tuaj yeem tsis tsuas yog grind li qub, tab sis kuj ntxuav lub chrome nto ntawm lub tsheb. Nqe - los ntawm 550 rubles. rau ntim.

Nws yuav tsum raug sau tseg tias kev faib cov khoom sib tsoo rau hauv cov kws tshaj lij thiab cov neeg nyiam ua haujlwm yog qhov tsis txaus ntseeg, thiab tsuas yog qhia nyob rau hauv ntim ntawm ib pob khoom.

Yuav ua li cas ua lapping muab tshuaj txhuam nrog koj tus kheej tes, rau lapping li qub