Yuav Ua Li Cas Tswj Cov Deformation hauv Kev Tsim Cov Ntoo Sau Cov Ntoo?

Cov chaw tsim khoom ntawm cov thawv ntim ntoo tau hais tias hauv peb lub xyoo ntawm kev tsim khoom, peb feem ntau pom tias txawm tias cov ntoo twb qhuav lawm, nws yuav cuam tshuam cov ntoo qhov hws vim cov av noo nyob rau hauv huab cua thaum lub sij hawm cia, uas tuaj yeem ua rau cov deformation theem nrab. ntawm ntoo. Hauv cov txheej txheem tsim khoom, peb tsis xav ntsib qhov teeb meem ntawm cov ntoo deformation, tab sis qee zaum peb tsuas yog tsis tuaj yeem kwv yees thiab tswj cov kev hloov ntawm cov av noo hauv huab cua. Peb tsuas tuaj yeem siv ntau tshaj ib qho kev tiv thaiv, tab sis peb tsis tuaj yeem lav 100 feem pua ​​​​ntawm deformation. Tus nqi deformation yuav tsum tsis txhob tshaj qhov kev lag luam tus qauv ntawm 1.5mm kom ntau li ntau tau. Hauv qab no yog ib qho kev qhia txog yuav ua li cas tswj qhov deformation hauv kev tsim cov thawv ntim ntoo:

Yog vim li cas rau ntoo warping thiab cracking yog tias ntoo muaj cov yam ntxwv ntawm noo noo expansion thiab qhuav shrinkage. Txoj cai lij choj yog tias thaum cov dej noo ntawm cov ntoo qis dua qhov taw tes fiber ntau saturation, qhov ntim ntawm ntoo nthuav dav; Raws li cov ntsiab lus noo noo txo, qhov ntim ntawm ntoo shrinks, thiab nws longitudinal thiab transverse lengths shrinks. Transverse shrinkage tuaj yeem muab faib ua radial thiab tangential cov lus qhia. Tshwj xeeb, muaj qhov sib txawv tseem ceeb hauv kev faib ua feem ntawm longitudinal thiab transverse shrinkage ntawm ntoo. Feem ntau, qhov longitudinal drying shrinkage yog li ntawm 0.1 feem pua, qhov transverse drying shrinkage kuj loj, tangential drying shrinkage yog siab li 12 feem pua, thiab radial drying shrinkage yog li 3 feem pua ​​~ 6 feem pua.

Yog li ntawd, qhov sib txawv ntawm longitudinal thiab transverse drying shrinkage ntawm ntoo yuav tsim tensile kev nyuaj siab raws tangent kev taw qhia ntawm tsob ntoo nplhaib thaum ziab. Thaum lub zog tensile ntau dua qhov kev sib koom ua ke ntawm cov ntoo ntoo, cov ntoo yuav raug kev sib hloov deformation thiab tawg.

2. Cov ntoo yuav tsum tau qhuav thiab nws cov ntsiab lus dej yuav tsum tau tswj nyob rau hauv ib theem uas haum rau cov av nruab nrab hauv zos kom txo tau cov dej sib pauv ntawm huab cua thiab ntoo. Txhawm rau kom muaj kev sib npaug sib npaug, ntoo tsis yooj yim rau tawg thiab deform. Cov kev cai hauv tebchaws tau teev tseg tias cov dej noo ntawm cov ntoo yog nyob nruab nrab ntawm 8 feem pua ​​-12 feem pua, uas yog los tswj cov kev deformation thiab cracking teeb meem hauv kev tsim cov thawv ntim ntoo.

3. Qhov saum npoo ntawm cov ntoo yuav tsum raug kaw kom cais cov dej noo thiab qhuav pauv ntawm cov ntoo thiab cov huab cua. Cov av noo thiab dryness sab hauv thiab sab nraud ntawm cov ntoo yuav tsum ua tib zoo tswj nws txoj kev ruaj khov thiab ua tiav lub hom phiaj ntawm kev tswj kev deformation thiab tawg hauv kev tsim cov thawv ntim ntoo.

4. Kev ziab thiab av tsis sib xws ntawm cov ntoo yuav ua rau muaj kev deformation lossis tawg ntawm cov rooj tog tiav. Tom qab ziab tag nrho, cov ntoo yuav tsum tau khaws cia rau ob peb lub hlis lossis ntau dua, thiab tom qab kev sib pauv txaus, qhov ziab thiab cov av noo hauv cov ntoo yuav tsum zoo ib yam li cov huab cua, muab cov txheej txheem tiv thaiv ntoo. Txawm li cas los xij, kev hloov pauv ntawm dryness thiab av noo nyob rau hauv cov huab cua tseem muaj qhov cuam tshuam tsis zoo ntawm cov ntaiv ntoo, thiab xim yog txheej thib ob ntawm kev tiv thaiv kev deformation.

Kev siv cov thawv ntim ntoo muaj qhov ua kom zoo nkauj, tshwj xeeb tshaj yog hauv kev txhim kho qib khoom, uas yuav txhawb nqa cov khoom muag. Yog tias lub ntim no siv los ntim cov khoom plig, nws tuaj yeem ua rau pom kev ua siab dawb thiab txhim kho qhov khoom plig zoo dua. Txhua yam ntawm cov khoom tau ntim rau hauv cov thawv ntoo, uas tuaj yeem nthuav tawm ntau qhov qub qub thiab atmospheric kev ntxhib los mos thiab nthuav qhia lub ntxim nyiam ntawm kab lis kev cai qub. Cov thawv ntim ntoo tsis yog tsuas yog muaj txiaj ntsig zoo xwb, tab sis kuj muaj txiaj ntsig zoo thiab muaj txiaj ntsig zoo nkauj. Cov thawv ntim ntoo muaj kev tiv thaiv zoo rau cov khoom hauv lub ntim, vim tias cov thawv ntoo feem ntau ruaj khov, ruaj khov, thiab muaj kev ruaj ntseg zoo yam tsis muaj kev txhawj xeeb txog kev puas tsuaj lossis deformation. Kev tiv thaiv ntawm cov khoom siv sab hauv los txhim kho kev ua haujlwm muaj zog heev, yog li tsis tas yuav txhawj xeeb txog kev puas tsuaj rau cov khoom siv sab hauv thaum thauj thiab khaws cia.