Resistance chaw vuam yog cov txheej txheem siv dav hauv kev tsim khoom, tshwj xeeb tshaj yog nyob rau hauv tsheb thiab aerospace sectors. Thaum lub sij hawm vuam txheej txheem, siab tam sim no yog dhau los ntawm ob los yog ntau tshaj overlapping hlau los xij, ua kom sov ntawm lub interface. Qhov kub no ua rau cov hlau yaj thiab fuse, ua kom muaj kev sib koom ua ke. Txawm li cas los xij, cov cua sov hauv cheeb tsam kuj ua rau thermal expansion thiab deformation tom qab hauv cov khoom siv welded.
Nkag siab thiab ntsuas qhov thermal expansion deformation hauv qhov chaw vuam yog qhov tseem ceeb rau kev ua kom zoo thiab kev ncaj ncees ntawm cov pob qij txha welded. Hauv tsab xov xwm no, peb delve rau hauv kev tsom xam ntawm qhov tshwm sim thiab nws qhov cuam tshuam.
1. Ua rau ntawm Thermal Expansion Deformation
Lub hauv paus ua rau thermal expansion deformation nyob rau hauv qhov chaw welding yog cov cua kub ceev thiab txias ntawm cov ntaub ntawv welded. Thaum siv tam sim no, cov hlau ntawm weld interface heats sai sai. Qhov cua sov hauv cheeb tsam no ua rau cov hlau nthuav dav. Raws li qhov vuam tam sim no raug tua thiab cov hlau txias, nws cog lus. Txawm li cas los xij, vim qhov ceev ceev ntawm cov txheej txheem, qhov contraction tsis sib xws, ua rau deformation.
2. Cov yam ntxwv cuam tshuam rau Deformation
Muaj ntau yam cuam tshuam rau qhov ntev ntawm thermal expansion deformation:
ib. Khoom siv:Cov khoom sib txawv muaj qhov sib txawv coefficients ntawm thermal expansion. Yog li, kev xaiv ntawm cov ntaub ntawv tuaj yeem cuam tshuam qhov loj ntawm deformation.
b. Welding tam sim no thiab sijhawm:Cov vuam tam sim no siab dua thiab lub sijhawm vuam ntev tuaj yeem ua rau muaj qhov cuam tshuam loj dua vim lawv ua rau muaj kev hloov pauv kub ntau.
c. Thickness ntawm cov khoom:Cov ntaub ntawv tuab dua muaj qhov ntim ntau dua los nthuav dav thiab cog lus, uas ua rau muaj kev cuam tshuam loj dua.
d. Electrode Tsim:Kev tsim thiab cov ntaub ntawv ntawm cov vuam electrodes tuaj yeem cuam tshuam rau kev faib hluav taws xob thiab, yog li, deformation.
3. Txoj kev tsom xam
Txhawm rau txheeb xyuas thiab kwv yees thermal expansion deformation nyob rau hauv qhov chaw welding, ntau txoj kev tshuaj ntsuam tuaj yeem ua haujlwm:
ib. Finite Element Analysis (FEA):FEA tso cai rau kev ua qauv ntawm tag nrho cov txheej txheem vuam, xav txog yam xws li cov khoom siv, kev faib hluav taws xob, thiab lub sijhawm. Qhov no muab cov ncauj lus kom ntxaws txog cov qauv deformation.
b. Kev sim ntsuas:Kev ntsuam xyuas tiag tiag tuaj yeem ntsuas qhov deformation ncaj qha, muab cov ntaub ntawv pov thawj rau kev siv tau thiab ua kom zoo dua ntawm cov qauv ntsuas.
c. Computer Simulations:Kev simulations, suav nrog cov khoom siv thiab cov txheej txheem tsis zoo, tuaj yeem kwv yees qhov tshwm sim deformation thiab pab ua kom zoo dua vuam cov xwm txheej.
4. Cov tswv yim txo qis
Kev txo qis thermal expansion deformation yog qhov tseem ceeb rau kev tsim cov welds zoo. Qee cov tswv yim los txo cov deformation muaj xws li:
ib. Preheating:Preheating cov ntaub ntawv ua ntej welding tuaj yeem txo qhov kub ntawm qhov sib txawv thiab tom qab deformation.
b. Tswj Cooling:Ua raws li cov kev tswj kom txias, xws li kev kho cua sov tom qab vuam, tuaj yeem pab tswj kev deformation.
c. Kev xaiv khoom siv:Xaiv cov khoom siv nrog cov coefficient zoo sib xws ntawm thermal expansion tuaj yeem txo qhov deformation.
d. Txheej txheem Optimization:Fine-tuning vuam tsis zoo li tam sim no, lub sij hawm, thiab electrode tsim yuav txo tau deformation tendencies.
Hauv kev xaus, thermal expansion deformation yog ib qho kev sib tw hauv qhov chaw welding. Txawm li cas los xij, nrog kev nkag siab zoo ntawm nws cov laj thawj thiab qhov cuam tshuam, nrog rau kev siv cov txheej txheem tshuaj ntsuam xyuas thiab cov tswv yim txo qis, cov tuam ntxhab tuaj yeem tsim cov welds ntawm superior zoo thiab cov qauv kev ntseeg siab.
Post lub sij hawm: Sep-25-2023
