Kev paub txog Roughness
2023-08-16
1 、 Tom qab ua tiav, cov khoom yuav muaj qhov loj lossis me me peaks thiab cov kwj deg ntawm qhov chaw ua haujlwm vim yog cov cuab yeej txiav, chip deposits, thiab burrs. Qhov siab ntawm cov peaks thiab hav yog me me, feem ntau tsuas yog pom thaum loj. Qhov no micro geometric feature yog hu ua nto roughness.
2, Qhov cuam tshuam ntawm Nto Roughness ntawm kev ua haujlwm ntawm cov khoom siv tshuab
Nto roughness muaj qhov cuam tshuam loj rau qhov zoo ntawm qhov chaw, feem ntau tsom rau lawv qhov hnav tsis kam, haum lub zog, qaug zog lub zog, workpiece raug, thiab corrosion kuj.
① Kev cuam tshuam ntawm kev sib txhuam thiab hnav. Qhov cuam tshuam ntawm qhov roughness ntawm qhov hnav feem ntau yog tshwm sim nyob rau hauv lub ncov thiab ncov, qhov twg ob qhov chaw tuaj rau hauv kev sib cuag nrog ib leeg, uas yog ib feem ntawm kev sib cuag. Lub siab ntawm qhov chaw sib cuag yog siab heev, uas tuaj yeem ua rau cov khoom siv los ntawm cov yas ntws. Qhov rougher saum npoo, qhov hnyav dua qhov hnav.
② Qhov cuam tshuam rau kev sib koom tes. Muaj ob hom kev tivthaiv haum, cuam tshuam haum thiab clearance haum. Rau kev cuam tshuam haum, vim lub flattening ntawm lub nto peaks thaum lub sij hawm sib dhos, qhov cuam tshuam tus nqi raug txo, uas txo qhov kev sib txuas lub zog ntawm cov khoom; Rau clearance haum, raws li lub ncov yog tsis tu ncua flattened, lub degree ntawm clearance yuav nce. Yog li ntawd, nto roughness cuam tshuam rau stability ntawm mating zog.
③ Qhov cuam tshuam ntawm kev tiv thaiv kev qaug zog. Qhov rougher ntawm qhov chaw, qhov tob ntawm qhov dent, thiab qhov me me ntawm curvature radius ntawm lub trough, ua rau nws yooj yim rau kev ntxhov siab concentration. Yog li ntawd, qhov loj dua qhov roughness ntawm ib feem, qhov ntau rhiab nws qhov kev ntxhov siab concentration yog, thiab qis dua nws tsis kam ua rau qaug zog.
④ Cov teebmeem corrosive. Qhov loj dua qhov roughness ntawm ib feem, qhov tob nws yoj hav. Nyob rau hauv txoj kev no, hmoov av, lwj lubricating roj, acidic thiab alkaline corrosive tshuaj tau yooj yim sau nyob rau hauv cov kwj thiab nkag mus rau hauv lub puab txheej ntawm cov khoom, exacerbating corrosion ntawm qhov chaw. Yog li ntawd, txo qhov roughness ntawm qhov chaw tuaj yeem txhim kho corrosion kuj ntawm qhov chaw.
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