Daim duab 1.Piv txwv ntawm Shore D hardness ntsuas siv los piav qhia qhov chaw indentation kuj nyob rau hauv cov khoom siv potting nruj.
Taw qhia
Shore D hardness yog ib qho ntawm feem ntau siv tsis tau hauv potting compound specifications.
Txawm li cas los xij, nws kuj yogib qho ntawm feem ntau tsis to taub qhov tseem ceebhauv electronics encapsulation tsim.
Ntau pab pawg tsim intuitively koom siab dua Shore D hardness nrog kev tiv thaiv zoo dua lossis kev ntseeg siab dua.
Hauv kev xyaum,hardness tsuas yog piav qhia txog kev tiv thaiv ntawm qhov chaw indentation, tsis zoo li cas cov khoom kho tau zoo nyob rau hauv thermal lossis mechanical stress.
Kab lus no piav qhiaDab tsi Shore D hardness ntsuas tau, qhov nws tsis sawv cev, thiab yuav ua li cas cov engineers yuav tsum txhais nwsthaum ntsuas cov khoom siv potting.
Shore D Hardness yog dab tsi?
Shore D hardness yog ib qho kev ntsuas ntsuas uas qhia tau hais tiascov khoom tsis kam mus rau indentation nyob rau hauv ib tug txhais quab yuam.
Nws yog feem ntau siv rauCov yas tawv tawv, thermoset resins, thiab tawv polymers, qhov twg softer Shore A nplai tsis tsim nyog lawm.
Cov yam ntxwv tseem ceeb ntawm Shore D hardness muaj xws li:
Ntsuas siv Shore D durometer nrog lub ntsej muag ntse
Sawv cevnto kuj, tsis bulk deformation
Muaj txiaj ntsig rau kev sib pivtxheeb ze rigidityntawm cov khoom kho
Cov ntsiab lus tseem ceeb:
Shore D hardness tsis ntsuas elasticity, toughness, los yog kev ntxhov siab absorbability.
Daim duab 2.Lub tswv yim sib piv ntawm Shore A thiab Shore D hardness scales, qhia txog lawv cov kev siv sib txawv hauv cov mos mos elastomers thiab rigid potting
cov ntaub ntawv.
Vim li cas Shore D feem ntau siv hauv Epoxy Potting
Epoxy potting compounds feem ntau poob rau hauv Shore D ntau vim tias lawv kho rau hauvheev crosslinked, nruj networks.
Los ntawm qhov kev xav ntawm engineering, Shore D hardness feem ntau hais vim nws:
- Qhiadimensional txhav tom qab kho
- Pab piavstructural rigidityntawm lub encapsulant
- Tso cai rau kev sib piv ntawm cov txheej txheem nruj sib txawv
Yog li ntawd, Shore D tau dhau los ua ib qho yooj yim shorthand piav txog kev kho tus cwj pwm epoxy.
Txawm li cas los xij,yooj yim yuav tsum tsis txhob totaub nrog kev ua tiav.
Dab tsi Shore D Hardness UaTsis yogQhia rau koj
Feem ntau tsim yuam kev yog kho hardness raws li ib tug proxy rau kev ntseeg tau.
Hauv kev muaj tiag, Shore D hardness uatsis yogqhia:
- Internal stress generated thaum kho
- Kev ntxhov siab hloov thaum lub caij thermal cycling
- Muaj peev xwm ua kom haum rau CTE mismatch
- Tsis kam tawg los yog delamination dhau sijhawm
Tus nqi siab Shore D tsuas yog lees paub tias cov khoom tiv thaiv tsis muaj kev cuam tshuam - nws tsis piav qhia tias kev ntxhov siab tshwm sim los yog sib sau ua ke hauv ib lub rooj sib txoos encapsulated.
Hardness vs. Stress Hloov hauv Encapsulation
Cov khoom siv hluav taws xob yog tsim los ntawm cov khoom siv sib txawv ntawm cov thermal expansion (CTE), suav nrog:
- PCBs
- Ceramic Cheebtsam
- Hlau conductors
- Polymer vaj tse
Thaum cov kev sib dhos no yog encapsulated nrogsiab -hardness, qis- cov ntaub ntawv deformation, thermal expansion yog txwv.
Engineering qhov tshwm sim:
Thermal strain yog hloov ncaj qha mus rau hauv mechanical stress, uas concentrates ntawm cov khoom siv interfaces thiab cov khoom terminations.
Daim duab 3.Schematic illustration qhia yuav ua li cas thermal expansion mismatch yuav hloov kev ntxhov siab los ntawm nruj potting cov ntaub ntawv rau hluav taws xob Cheebtsam.
Qhov kev ntxhov siab no yuav tsis pom tam sim ntawd, tab sis tuaj yeem tshwm sim tom qab xws li:
- Micro{0}} tawg
- Interface sib cais
- Ntev - kev cia siab rau lub sij hawm degradation
Thaum Shore D HardnessYogtxoj cai Metric
Txawm hais tias nws cov kev txwv, Shore D hardness tseem yog qhov siv tau thiab muaj txiaj ntsig zoo thaum thov kom tsim nyog.
Nws yog qhov tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov uas muaj qhov tseem ceeb:
- Cov qauv rigidity
- Cov duab tuav
- Mechanical fixation
- Tsawg feem cuam tshuam
Hauv cov ntsiab lus no, Shore D pab piav qhiatawv, tsis tswj kev ntxhov siab.
Yuav ua li cas engineers yuav tsum txhais cov Shore D nyob rau hauv xyaum
Ib txoj hauv kev zoo dua yog kho Shore D hardness liib tug parameter nyob rau hauv ib tug dav dav tsim ntsiab lus teb.
Pom zoo txhais lus:
- Siv Shore D los sib pivtxheeb ze rigidity
- Ntsuas cov thermal ntau, geometry, thiab cov khoom sib txuas sib cais
- Tsis txhob xav tias qhov hardness siab dua tuaj yeem txhim kho kev ntseeg tau
Kev txiav txim siab engineering tseem ceeb dua li cov lej hardness ib leeg.
Cov kev xav tsis zoo txog Shore D Hardness
Misconception 1:Higher Shore D txhais tau tias kev tiv thaiv zoo dua
→ Kev tiv thaiv nyob ntawm tus cwj pwm kev ntxhov siab, tsis yog qhov tawv tawv.
Misconception 2:Shore D kwv yees qhov kev pheej hmoo tawg
→ Cracking yog tsav los ntawm kev ntxhov siab, tsis yog indentation kuj.
Misconception 3:Ib tus nqi hardness haum rau txhua tus qauv tsim
→ Optimal hardness nyob ntawm cov qauv sib dhos thiab kev ua haujlwm.
Xaus
Shore D hardness yog ib qho kev piav qhia tseem ceeb -tab sis tsuas yog thaum nws cov kev txwv kom nkag siab meej.
Hauv kev siv hluav taws xob potting,Kev txhais lus tsis zoo raws li kev ntsuas ntawm kev ntseeg tau tuaj yeem qhia txog kev pheej hmoo ntev ntev -uas tsis pom thaum pib tshuaj xyuas.
Hardness piav qhia txog qhov nyuaj ntawm cov khoom siv.
Nws tsis piav qhia tias lub rooj sib txoos muaj sia nyob li cas.
Internal Reference(Tiered Linking)
Rau kev sib tham sib sib zog nqus engineering txog yuav ua li cas nruj, kev ntxhov siab sab hauv, thiab kev xaiv cov khoom sib cuam tshuam hauv kev tsim encapsulation, xa mus rau:
→ Tswj kev ntxhov siab hauv siab -Hardness Epoxy Potting (Kev xav txog kev tsim qauv engineering)
