Kev Txiav Txim ntawm Cov Kev Sib Tsoo lub log thiab ua rau hnav
Hauv cov txheej txheem sib tsoo, lub xeev ntawm kev ua haujlwm saum npoo ntawm cov sib tsoo log yog hloov tas li vim tias hnav cov log sib tsoo nws tus kheej. Nrog rau lub caij nyoog ntawm lub sijhawm sib tsoo, muaj peev xwm txiav kev sib tsoo lub log tsis zoo, thiab ntau yam ua rau cov txheej txheem sib tsoo tsis tas li, ua rau cov txheej txheem sib tsoo tsis tuaj yeem txuas ntxiv. Txij ntawm no, cov kev sib tsoo log yuav tsum tau hnav khaub ncaws kom rov qab sib tsoo lub xeev ib txwm. Qhov tseeb sib tsoo lub sijhawm ntawm kev sib tsoo log ntawm kev hnav khaub ncaws yog hu ua lub neej ntawm kev sib tsoo lub log. Lub neej ntawm kev sib tsoo log yog qhov tseem ceeb cuam tshuam cuam tshuam rau kev sib tsoo, tshwj xeeb tshaj yog rau kev sib tsoo.
Kev Txiav Txim ntawm Cov Kev Sib Tsoo Lub neej:
Feem ntau, nws yog nqa tawm los ntawm kev soj ntsuam thiab kev sim raws li ntau yam tshwm sim los ntawm kev hnav ntawm cov kev sib tsoo ntawm lub log sib tsoo. Kev sib tsoo tshwm sim los ntawm kev hnav lub log sib tsoo tsuas yog muaj: Kev co kom zoo siab rau tus txheej txheem kev sib tsoo, thiab cov kev co co kab sib tsoo ntawm cov chaw ua haujlwm; Sib tsoo ntau zog sib tsoo suab nrov; Sib tsoo hlawv rau saum npoo ntawm workpiece; Ntse nce lossis txo qis hauv kev sib tsoo zog; txo kev sib tsoo qhov raug; Kev sib tsoo sib tsoo saum npoo roughness.
Kev hnav thiab hnav khaub ncaws sib tsoo, uas yog, cov nyhuv ntawm cov kab ke zoo ntawm qhov sib tsoo ntawm cov log sib tsoo ntawm kev sib tsoo. Tshwj xeeb tshaj yog nyob rau hauv precision kev sib tsoo, sib tsoo log yuav tsum tau ua kom zoo nkauj thiab tshwj xeeb hnav yuav tsum tau teeb tsa kom muaj kev sib tsoo log tau nyob ntev.
Vim li cas rau kev sib tsoo lub log hnav:
1. Coj
Qhov saum npoo ntawm kev sib tsoo log yog tiaj thaum hnav loj me me tshwm sim thiab pom kev hnav dav hlau tshwm nyob rau saum npoo ntawm kev sib tsoo cov nplej. Nyob rau lub sijhawm no, tag nrho cov kev hnav thaj chaw ntawm kev txiav kev nce ntxiv thiab kev sib txhuam tsis sib haum, ua rau nws nyuaj rau kev txiav rau hauv cov chaw ua haujlwm. Txawm li cas los xij, cov kev sib tsoo lub log hardness yog ntau dhau los ua rau cov abrasive ua kom tawg thiab poob rau lub sijhawm. Yog hais tias cov kev sib tsoo lub log txuas ntxiv mus siv, kev sib tsoo sib tsoo thiab kev sib tsoo cua sov yuav nce ntxiv, thiab muaj suab nrov, thiab cov khoom siv tsis tau zoo. Hauv qhov no, lub log sib tsoo yuav tsum tau hnav khaub ncaws. Qhov kev coj zoo feem ntau tshwm sim thaum lub zog abrasive ntawm cov cav uas tsis muaj zog yog qhov siab, lub zog abrasive yog qhov zoo thiab lub zog tensile ntawm workpiece cov khoom yog siab. Qhov no yog qhov tshwm sim ntawm qhov kawg ntawm kev sib tsoo lub log lub neej thaum machining steel sib tsoo hauv kev sib tsoo.
2. Oxidation hnav
Cov khoom sib txawv ntawm cov tub rog uas muaj cov oxides, carbides thiab nitrides. Oxide abrasives yog ruaj khov nyob rau hauv huab cua, thaum cov chaw ntawm lwm cov abrasives yog oxidized thaum kub thiab maj mam noj.
3. Diffusion hnav
Nws hais txog cov hnav los ntawm qhov tsis muaj zog ntawm cov npoo tsis muaj zog ntawm cov ntsiab lus ntawm cov khoom sib tsoo ntawm cov khoom sib tsoo ntawm cov khoom sib tsoo ntawm qhov kub. Kev sib nrig sib sib npluav ntawm cov ntsiab ntawm ob cov khoom yog ze ze rau cov tshuaj lom neeg muaj pes tsawg leeg. Vim tias muaj peev xwm ntawm cov pa roj carbon hauv pob zeb diamond Abrasive mus rau diffuse thiab yaj hauv boron nitride abrasive, nws tsis haum rau pob zeb sib tsoo kom tau sib tsoo hlau.
4. Thermal kev ntxhov siab
Nyob rau hauv cov txheej txheem sib tsoo, kev ua haujlwm saum npoo ntawm abrasive lub nkoj nce mus rau qhov siab tam sim ntawd, thiab cov sib tsoo log txias sai li sai tau raws li kev sib tsoo kua. Qhov zaus ntawm lub txias thiab cua sov lub voj voog yog tib yam li kev ceev ntawm cov qoob loo thermal no, ua rau cov abrasive grain mus tawg thiab tawg. Thermal kev ntxhov siab feem ntau yog nyob ntawm cov thermal conductivity ntawm abrasive, linear nthuav coefficient thiab kev ua haujlwm ntawm cov kua sib tsoo. Tus me dua cov thermal conductivity, qis dua ntawm linear nthuav kev coefficiention. Lub siab dua linear nthuav kev coefficient yog, qhov zoo dua cov kua cua txias ua tau yog, qhov yooj yim dua cov kev ntxhov siab thermal yog, thiab tawg los ntawm kev cuam tshuam ntawm thermal. Qhov kev txiav txim ntawm thermal ntawm abrasives yog pob zeb diamond, cubic boron nitride, silicon carbide, corundum.
5. Yas hnav
Nyob rau hauv qhov kev txiav txim ntawm kev sib tsoo siab kub, cov abrasive hais yuav hnav vim yog yas deformation. Cov ris tsho yas tsuas yog nyob ntawm cov thermal hardness ntawm workpiece cov khoom siv. Thaum sib tsoo, yog tias cov thermal hardness ntawm lub nti nyob rau sab hauv ntawm lub cav sib tsoo loj dua li uas nyob rau thaj tsam ntawm cov sib tsoo yuav tshwm sim.
Siab tshaj ob peb ua rau kev sib tsoo lub log hnav. Raws li cov khoom sib txawv, cov khoom siv ua haujlwm thiab sib tsoo, lub ntsiab ua rau kev sib tsoo lub log hnav yuav sib txawv. Yog li no, kev xaiv tsim nyog ntawm kev sib tsoo log thiab cov hnav khaub ncaws qhov sib txuam ntawm cov log sib tsoo yuav ua rau muaj kev sib tsoo ntawm qhov tseeb ntawm workpiece. Yog li ntawd, lub log sib tsoo yuav tsum tau hnav khaub ncaws nyob rau lub sijhawm thaum sib tsoo. Tsis tas li ntawd, cov log sib tsoo xav tau kev hnav khaub ncaws tom qab pib teeb tsa. Lub ntsiab lus ntawm kev sib tsoo log hnav khaub ncaws yog ua kom zoo thiab ntse cov kev sib tsoo lub log. Shaping yog ua kom cov kev sib tsoo log ncav cuag cov duab geometric uas yuav tsum tau txiav, thiab ua kom cov abrasive Tuab tawg kom ua rau cov ntse sib tsoo. Thiab hlwv yog tshem cov nyiaj txhiv ntawm cov abrasive nplej, yog li muaj ib qho kev txwv tsis pub muaj qhov chaw muaj abrasive tshaj qhov kev sib khi los ua cov ntug kev txiav. Raws li cov kev sib txawv thiab kev sib tsoo ntawm kev sib tsoo lub log, cov kev hnav khaub ncaws kuj sib txawv.