Nyob rau hauv cov txheej txheem ntawm kev siv txhua hnub ntawm lub tshuab polishing, qhov teeb meem loj ntawm cov neeg siv yog "ntau polishing". Lub sij hawm polishing ntev dhau lawm ua rau qhov zoo ntawm cov cuab yeej pwm tuaj pwm, thiab feem ntau muaj qhov tshwm sim xws li "txiv kab ntxwv tev" thiab "pitting". Peb yuav ua li cas nrog cov xwm txheej zoo li no? Cia peb tham txog yuav ua li cas los daws qhov teeb meem ntawm "dhau polishing" ntawm polishing tshuab.
Thaum lub workpiece muaj "txiv kab ntxwv tev" tshwm sim, nws yog tshwm sim los ntawm overheating los yog ntau carburization ntawm pwm nto. Thaum lub polishing siab kuj loj thiab lub sij hawm polishing kuj ntev, nws tseem yuav ua rau "txiv kab ntxwv tev" tshwm sim ntawm cov khoom siv. Dab tsi yog "txiv kab ntxwv tev"? Qhov saum npoo yog irregular thiab ntxhib; Rau cov hlau tsis tshua muaj zog, nws yog qhov loj heev rau dais polishing siab, thiab rau cov hlau kuj muag, nws yooj yim heev kom muaj teeb meem ntau dhau polishing.
Yog li cas kev ntsuas yuav raug coj los tshem tawm "txiv kab ntxwv tev" ntawm lub workpiece? Ua ntej, peb yuav tsum tau tshem tawm qhov tsis xws luag, ces qhov sib tsoo particle loj me ntsis thicker dua li yav tas los siv xuab zeb tooj, txo cov tempering kub los ntawm 25 degree, ces tshem tawm cov kev ntxhov siab, ces zom nrog ib tug sib tsoo cov cuab yeej nrog ib tug finer xuab zeb tooj, thiab tom qab ntawd txhuam nrog lub zog sib zog kom txog thaum cov nyhuv txaus siab.
Lub npe hu ua "pitting" yog hais txog qhov tshwm sim ntawm pitting pits ntawm polished workpiece nto. Qhov no yog vim hais tias cov hlau workpiece yuav tov nrog ib co non-metallic impurities, feem ntau nyuaj thiab nkig oxides. Yog hais tias lub polishing siab dhau lawm los yog lub sij hawm polishing ntev dhau lawm, cov impurities yuav raug rub tawm los ntawm cov hlau nto los ua cov dot pits. Tshwj xeeb tshaj yog thaum lub purity ntawm hlau tsis txaus thiab cov ntsiab lus ntawm cov impurities nyuaj siab; Tam sim no, thaum lub npoo yog xeb lossis cov khoom siv tawv dub tsis tshem tawm qhov kev xav, nws yuav muaj "pitting corrosion".
Yuav ua li cas tshem tawm "pitting"? Thaum regrinding nto ntawm lub workpiece, cov xuab zeb particle loj ntawm cov abrasives siv yuav tsum yog me ntsis thicker dua li uas siv yav tas los, thiab sib tsoo quab yuam yuav tsum me me. Tom qab ntawd siv cov mos thiab ntse oilstone rau kev sib tsoo, thiab tom qab ntawd ua tiav cov txheej txheem polishing tom qab ncav cuag cov txiaj ntsig zoo. Thaum polishing, yog tias qhov loj ntawm cov xuab zeb hais tsawg dua 1 hli, cov cuab yeej polishing yuav tsum zam. Qhov kev siv ntawm lub teeb khiav yuav tsum tsawg li tsawg tau thiab lub sijhawm yuav tsum luv li sai tau.