Kev sib tsoo yog ib txoj hauv kev uas feem ntau siv rau kev sib khi ntawm cov li qub hauv cov txheej txheem tsim khoom. Kev sib tsoo tuaj yeem ua rau lub valve sealing nto tau qhov raug siab qhov tseeb, geometric duab roughness thiab nto roughness, tab sis nws tsis tuaj yeem txhim kho qhov kev sib nrig sib raug ntawm qhov chaw ntawm lub sealing nto. Qhov tseeb qhov tseeb ntawm qhov av valve sealing nto feem ntau yog {{0}} 001~0.003mm; cov duab geometric raug (xws li qhov tsis sib xws) yog 0.001mm; Qhov saum npoo roughness yog 0.1 ~ 0.008.
Lub hauv paus ntsiab lus ntawm sealing nto sib tsoo muaj tsib yam: txheej txheem sib tsoo, sib tsoo txav, sib tsoo ceev, sib tsoo siab thiab sib tsoo nyiaj.
1 Cov txheej txheem sib tsoo
Cov cuab yeej sib tsoo thiab qhov saum npoo ntawm lub nplhaib sealing zoo sib xyaw ua ke, thiab cov cuab yeej sib tsoo ua rau kev sib tsoo nyuaj ntawm qhov sib koom ua ke. Abrasives yog muab tso rau nruab nrab ntawm cov cuab yeej lapping thiab nto ntawm lub nplhaib sealing. Thaum lub cuab yeej lapping thiab qhov chaw ntawm lub nplhaib sib khi txav mus rau ib leeg, ib feem ntawm cov nplej abrasive nyob rau hauv lub abrasive yuav swb los yog yob ntawm lub cuab tam lapping thiab nto ntawm lub nplhaib sealing. txheej hlau. Lub ncov ntawm qhov chaw ntawm lub nplhaib sealing yog thawj zaug hauv av, thiab tom qab ntawd qhov xav tau geometry yog maj mam ua tiav.
Kev sib tsoo tsis yog tsuas yog cov txheej txheem ntawm kev sib tsoo ntawm cov hlau, tab sis kuj yog kev ua tshuaj lom neeg. Cov roj hauv cov abrasive tuaj yeem tsim cov oxide zaj duab xis rau ntawm qhov chaw kom ua tiav, yog li ua kom ceev cov txheej txheem sib tsoo.
2 sib tsoo txav
Thaum cov cuab yeej sib tsoo thiab qhov chaw ntawm lub nplhaib sib khi txav mus rau ib leeg, qhov sib npaug ntawm cov txheeb ze zawv zawg txoj kev ntawm txhua qhov taw tes ntawm qhov chaw ntawm lub nplhaib sib khi mus rau cov cuab yeej sib tsoo yuav tsum zoo ib yam. Tsis tas li ntawd, cov kev taw qhia ntawm kev txheeb ze yuav tsum tau hloov tas li. Qhov kev hloov pauv tas mus li ntawm kev txav mus los tiv thaiv txhua qhov abrasive grain los ntawm kev rov ua dua nws tus kheej txoj hauv kev ntawm lub nplhaib sealing, thiaj li tsis ua kom pom tseeb hnav cov cim thiab ua rau kom qhov roughness ntawm lub nplhaib sealing. Tsis tas li ntawd, kev hloov pauv tsis tu ncua ntawm cov kev taw qhia ntawm cov lus tsa suab tsis tuaj yeem ua rau cov abrasive sib npaug sib npaug, yog li cov hlau ntawm lub nplhaib sealing tuaj yeem txiav ntau qhov sib npaug.
Txawm hais tias txoj kev sib tsoo yog qhov nyuaj thiab cov kev taw qhia ntawm kev txav txav tau zoo heev, kev sib tsoo lub zog yog ib txwm ua raws li kev sib tsoo ntawm cov cuab yeej sib tsoo thiab qhov chaw ntawm lub nplhaib sealing. Txawm hais tias nws yog phau ntawv sib tsoo lossis kev sib tsoo tshuab, cov duab geometric qhov tseeb ntawm lub nplhaib sealing nto feem ntau cuam tshuam los ntawm cov duab geometric raug ntawm cov cuab yeej sib tsoo thiab kev sib tsoo.
3 sib tsoo ceev
Qhov kev sib tsoo nrawm dua, qhov sib tsoo zoo dua. Kev sib tsoo ceev ceev, cov khoom abrasive ntau dhau los ntawm qhov chaw ntawm qhov chaw ua haujlwm ib lub sijhawm, thiab ntau cov hlau raug txiav tawm.
Kev sib tsoo ceev feem ntau yog 10 ~ 240m / min. Rau workpieces xav tau kev sib tsoo siab precision, kev sib tsoo ceev feem ntau tsis tshaj 30m / min. Kev sib tsoo ceev ntawm lub valve sealing nto yog cuam tshuam nrog cov khoom ntawm lub sealing nto. Kev sib tsoo ceev ntawm tooj liab thiab cam khwb cia hlau sealing nto yog 10 ~ 45m / min; hardened steel thiab hard alloy sealing nto yog 25 ~ 80m / min; austenitic stainless hlau sealing nto 10 ~ 25m / min.
4 sib tsoo siab
Kev sib tsoo efficiency nce nrog qhov nce ntawm kev sib tsoo siab, thiab kev sib tsoo siab yuav tsum tsis txhob siab dhau, feem ntau 0.01-0.4MPa.
Thaum sib tsoo lub sealing nto ntawm cam khwb cia hlau, tooj liab thiab austenitic stainless hlau, qhov sib tsoo siab yog {{0}}.1 ~ 0.3MPa; lub sealing nto ntawm hardened steel thiab hard alloy yog 0.15 ~ 0.4MPa. Siv tus nqi loj dua rau kev sib tsoo ntxhib thiab tus nqi me me rau kev sib tsoo zoo.
5 Sib tsoo nyiaj pub dawb
Txij li kev sib tsoo yog cov txheej txheem tiav, qhov kev txiav yog me me heev. Qhov loj ntawm cov nyiaj sib tsoo yog nyob ntawm qhov tseeb machining thiab nto roughness ntawm cov txheej txheem dhau los. Nyob rau hauv qhov kev pom zoo ntawm kev ua kom muaj kev tshem tawm cov txheej txheem ntawm cov txheej txheem dhau los thiab kho qhov yuam kev geometric ntawm lub nplhaib sealing, qhov me me ntawm kev sib tsoo nyiaj, qhov zoo dua.
Lub sealing nto yuav tsum feem ntau yog hauv av ua ntej sib tsoo. Tom qab kev sib tsoo zoo, lub sealing nto tuaj yeem ncaj qha lapped, thiab qhov nyiaj sib tsoo yam tsawg kawg nkaus yog: txoj kab uas hla yog {{0}}}008 ~ 0.020mm; lub dav hlau pub yog 0.006 ~ 0.015mm. Siv tus nqi me me thaum kev sib tsoo los yog cov khoom siv hardness siab, thiab coj tus nqi loj thaum cov khoom sib tsoo lossis cov khoom hardness tsawg.
Lub sealing nto ntawm lub valve lub cev yog qhov tsis yooj yim rau hauv av thiab ua tiav, yog li siv tau zoo tig. Tom qab ua tiav, lub sealing nto yuav tsum yog av ntxhib ua ntej ua tiav, thiab lub dav hlau pub yog {{0}}.012 ~ 0.050mm.