Kev sib tsoo tawg (dub tawg me ntsis) tsim los ntawmnto sib tsootsis yog tsim dheev, tab sis tshwm sim sporadically ntawm qhov chaw ntawm lub workpiece. Txawm hais tias muaj kev sib tsoo tawg, nws tseem nyuaj rau cov novices kom paub qhov txawv. Cov kab nrib pleb ntawm cov dej sib tsoo kho nrog cov tshuaj tshwj xeeb tsis sib sib zog nqus, thiab qhov dav dav tsuas yog {{0}}.05 ~ 0.25mm.
Cov laj thawj rau kev sib tsoo tawg tuaj yeem yog raws li hauv qab no: qhov kev ntxhov siab sab hauv ntawm lub workpiece tshaj qhov kev txwv kev tawg, uas yog, lub workpiece muaj cov seem ntawm cov neeg kho tshuab kev ntxhov siab thiab thermal stress ntawm qhov chaw vim kev sib tsoo yav dhau los lossis kev kho cua sov. Vim yog kev sib tsoo ntawm qhov no ntawm qhov kev ntxhov siab uas tuaj yeem tswj tau qhov sib npaug, qhov kev ntxhov siab seem dhau los ntawm lub zog ntawm lub workpiece, thiab kev sib tsoo tawg yog tsim.
Ntawm tag nrho cov laj thawj, "kev sib tsoo tsim los ntawm kev sib tsoo" yog qhov tseem ceeb ntawm qhov teeb meem. Qhov teeb meem loj tshaj plaws yog qhov kev ntxhov siab tsim los ntawm kev sib tsoo kub. Vim yog qhov sib tsoo cua sov, qhov kub ntawm qhov chaw ua haujlwm ntawm qhov chaw ua haujlwm tau nce sai, thiab qhov no yuav raug tempering lossis lwm yam kev kho cua sov. Vim qhov kev hloov ntawm cov qauv sab hauv thiab qhov shrinkage ntawm qhov chaw, cov kab nrib pleb yog tsim nyob rau hauv qhov kev txiav txim ntawm tensile stress.
1. Ib qho piv txwv ntawm kev sib raug zoo ntawm tus nqi pub ntawm lub log sib tsoo thiab cov residualstress.
① Lub tensile kev ntxhov siab yuav maj mam nce nrog qhov nce ntawm kev pub mis ntawm lub log sib tsoo, thiab maj mam mus rau lub zog tensile ntawm cov khoom siv ua haujlwm. Thaum lub zog tensile ntawm cov khoom siv ua haujlwm dhau lawm, cov kab nrib pleb yuav tshwm sim.
② Lub compressive kev ntxhov siab yuav tsis hloov ntau dhau, vim hais tias qhov ntsuas thiab qhov kev sim sib txawv, yog li nws tsis tuaj yeem sib piv, tab sis qhov yuav luag tsis hloov yog tias thaum lub nraub qaum txiav yog 0.05mm, qhov seem tensile stress yog qhov loj tshaj plaws, txawm tias qhov txiav yog tob. Kev ntxhov siab yuav tsis zoo heev. Nws feem ntau ntseeg tias qhov no yog vim qhov poob ntawm abrasive hais.
2. Ib qho piv txwv ntawm kev ntsuas qhov seem ntawm qhov kev ntxhov siab tom qab sib tsoo los ntawm kev hloov cov khoom noj ntawm lub log sib tsoo.
① Qhov ntau dua tus nqi pub ntawm lub log sib tsoo, qhov sib sib zog nqus qhov kev ntxhov siab.
② Cov kev ntxhov siab nyob hauv qhov chaw ua haujlwm ntawm kev sib tsoo raws li tensile kev nyuaj siab, thiab tseem tuaj yeem ua rau txoj kab ntsug ntawm kev sib tsoo cov kev taw qhia hauv daim ntawv ntawm lub siab, thiab qhov tob nws mus rau sab hauv, qhov kev ntxhov siab yuav txo qis.
③Thaum ua raws li kev sib tsoo thiab cov kev taw qhia ntsug, nws thawj zaug ua compressive kev nyuaj siab thiab mam li nco dheev dhau los ua tensile kev nyuaj siab raws li kev sib tsoo. Thaum nws ncav cuag tus nqi siab tshaj plaws, nws maj mam txo qis, thiab thaum kawg dhau los ua kev ntxhov siab me me.
Kev sib raug zoo ntawm lub hardness ntawm lub sib tsoo log thiab lub residual tensile quab yuam: lub hardness yog nruab nrab ntawm G, H, I, thiab J. Qhov siab dua qhov hardness, qhov ntau dua qhov seem residual stress.
Kev cuam tshuam ntawm qhov nrawm (peripheral ceev) ntawm lub log sib tsoo ntawm qhov seem ntawm qhov kev ntxhov siab: ib zaug qhov kev sib hloov ceev (peripheral ceev) tshaj 1500m / min, qhov kev ntxhov siab seem yuav nce siab.
Tsis tas li ntawd, vim muaj cov khoom sib txawv ntawm lub workpiece, kuj tseem muaj qhov sib txawv ntawm qhov cuam tshuam rau kev sib tsoo cov kab nrib pleb thiab qhov nyuaj ntawm kev sib tsoo tawg.
