Kev txiav txim siab tsim nyog ntawm kev sib tsoo nyiaj pub dawb yog qhov tseem ceeb los txhim kho cov khoom tsim tau thiab ua kom muaj kev ua tau zoo. Feem ntau hais lus, kev sib tsoo yog txheej txheem tiav. Piv nrog rau lwm txoj kev txiav, nws txoj kev txiav yog qis dua. Yog tias qhov nyiaj pub ntau dhau lawm, tus nqi ntau lawm yuav raug txo kom tsawg, thiab kev siv lub zog ntawm kev sib tsoo lub log thiab lub tshuab cuab yeej yuav nce ntxiv. Qee zaum, nws yuav txawm txo qhov zoo ntawm qhov chaw. Piv txwv li, rau workpieces uas tau undergone nto nitriding thiab high-frequency tshav kub kev kho mob, lub hardness ntawm txheej txheej yog siab tshaj, thiab hardness yog qis tshaj li nws mus rau sab hauv. Lub hardness ntawm txheej txheej tsis ua raws li qhov yuav tsum tau ua. Txawm li cas los xij, qhov nyiaj pub dawb yuav tsum tsis txhob tsawg dhau, txwv tsis pub cov txheej txheem ua haujlwm lossis cov txheej txheem tsis zoo uas tau tso los ntawm cov txheej txheem dhau los yuav tsis tuaj yeem ua rau hauv av. Yog li ntawd, lub hauv paus ntsiab lus tseem ceeb rau kev txiav txim siab ntawm kev sib tsoo nyiaj yuav tsum yog: nyob rau hauv qhov kev pom zoo ntawm kev ua kom zoo ntawm txheej txheej ntawm lub workpiece tom qab sib tsoo, qhov sib tsoo me me, qhov zoo dua.
Vim qhov nyuaj ntawm kev cuam tshuam ntawm cov nyiaj machining, nws yog ib qho nyuaj rau kev qhia kom meej ib qho kev sib sau ua ke. Feem ntau, nws tuaj yeem txiav txim siab los ntawm kev saib lub rooj los ntawm phau ntawv muaj feem cuam tshuam thiab sib txuas cov xwm txheej tshwj xeeb ntawm tus neeg sawv cev qhov chaw. Cov ntaub ntawv hauv qab no yog siv rau kev siv:
Thaum lub taub hau d<80mm, the ratio of length l to diameter d l/d<10, the grinding allowance after semi-finishing is generally 0.30~0.50mm. The smaller l/d and the hardened workpiece should take a smaller value.
Cov nyiaj ua haujlwm sab laug rau kev sib tsoo zoo tom qab sib tsoo, yog tias tsis muaj lwm cov txheej txheem nruab nrab ntawm kev sib tsoo thiab kev sib tsoo zoo, feem ntau {{0}}.03~0. 08mm tau txais; Yog tias kev sib tsoo ntxhib ua raws li lwm cov txheej txheem, xws li tig, milling, kho cua sov thiab lwm yam., cov nyiaj sib tsoo zoo tuaj yeem siv li 0.15 ~ 0.25mm. Yog hais tias lub workpiece xav tau nitriding tom qab sib tsoo ntxhib, qhov nyiaj sib tsoo zoo tuaj yeem yog li 0.10mm.
