Yuav Ua Li Cas Roj Hmab Hardness raug suav

Sep 23, 2024 Tso lus

 

Cov roj hmab hardness raug xam li cas?

 

 

Kev suav cov theoretical ntawm cov roj hmab sib xyaw yog hais txog kev suav ntawm qhov loj, ntim, thiab kev faib ua feem ntawm txhua yam hauv cov qauv, los kwv yees lub cev ntawm cov roj hmab, tshwj xeeb tshaj yog cov yam ntxwv ntawm hardness, ntom, ntim, muab tub lim, thiab lwm yam. Cov kev suav no muab lub hauv paus rau kev tsim thiab tsim cov khoom siv roj hmab thiab tseem pab cov engineers optimize formulations thaum tsim cov khoom tshiab. Ntawm no yog ob peb kauj ruam tseem ceeb thiab txoj hauv kev hauv kev suav theoretical ntawm cov roj hmab sib txuas.

 

Rubber Hardness yog dab tsi?

Roj hmab hardness yog hais txog lub peev xwm ntawm cov ntaub ntawv roj hmab los tiv thaiv deformation nyob rau hauv qhov kev txiav txim ntawm sab nraud quab yuam, uas kuj yuav to taub raws li nws "softness thiab hardness". Qhov siab dua qhov hardness, qhov muaj zog tiv thaiv deformation ntawm cov roj hmab; Qhov qis hardness, cov roj hmab softer.

 

Hardness tsis yog tsuas yog ib qho taw qhia los ntsuas kev ua tau zoo ntawm cov roj hmab, tab sis tseem cuam tshuam ncaj qha rau kev hnav tsis kam, qaug zog ua haujlwm, thiab kev ua haujlwm ntawm cov khoom siv roj hmab. Yog li ntawd, cov xwm txheej sib txawv muaj qhov sib txawv hardness yuav tsum tau rau roj hmab, piv txwv li, lub tsheb log tsheb feem ntau xav tau ib tug siab hardness, thaum cov roj hmab seals yuav tsum muaj ib tug nruab nrab hardness kom lawv elasticity thiab nruj.

 

Surgical-electric-saw-rubber-seals

 

Cov qauv kev sim rau cov roj hmab hardness

Muaj ntau txoj hauv kev los ntsuas cov roj hmab hardness, ob txoj hauv kev feem ntau yog Shore Hardness thiab International Rubber Hardness Degree (IRHD). Ntawm lawv, Shore hardness tau muab faib ua hom A, hom D, thiab lwm yam, raws li qhov sib txawv hardness ntawm cov roj hmab, xaiv qhov tsim nyog hardness tester.

 

Ntug hardness

Shore hardness yog ib txoj hauv kev ntawm kev ua kom tawv nqaij los ntawm kev ntsuas qhov degree ntawm indentation ntawm cov roj hmab nto. Nws nias lub conical los yog spherical indenter rau hauv cov roj hmab nto nyob rau hauv ib tug tej yam load, sau qhov tob ntawm indenter rau hauv cov roj hmab, thiab ces xam tus nqi hardness los ntawm ib tug tej yam mis nyuj.

 

Muaj ntau hom Shore hardness:

· Shore A hardness: siv los ntsuas cov roj hmab muag, xws li cov log tsheb, lub nplhaib sib khi, thiab lwm yam.

· Shore D hardness: siv los ntsuas cov khoom siv roj hmab nyuaj, xws li roj hmab engineering.

 

Cov txheej txheem xeem tshwj xeeb yog raws li hauv qab no:

· Muab cov qauv roj hmab tso rau hauv lub hardness tester thiab ua kom ruaj khov;

· Los ntawm kev siv ib qho kev quab yuam, qhov indenter ntawm hardness tester yog nias rau hauv cov qauv;

· Sau qhov tob ntawm indentation thiab muab tus nqi hardness raws li qhov ntsuas ntawm hardness tester.

 

Electric-bone-drill-rubber-seals

 

Shore A hardness feem ntau yog nyob ntawm 0 mus rau 100, nrog cov nqi siab dua sawv cev rau cov roj hmab nyuaj. Piv txwv li, ib daim ntawm cov khoom siv roj hmab nrog lub hardness ntawm 60 Shore A yog ib qho nyuaj tshaj li cov khoom uas muaj hardness ntawm 30 Shore A.

 

IRHD (International Rubber Hardness)

Zoo ib yam li Shore hardness, IRHD characterizes cov khoom hardness los ntawm kev ntsuas qhov tob ntawm qhov indenter yog nias rau hauv cov roj hmab. Qhov txawv yog tias IRHD hardness siv cov duab sib txawv indenter thiab loading rog, ua rau nws tsim nyog rau ntsuas nyias-walled cov khoom siv roj hmab.

 

IRHD hardness ntsuas feem ntau yog qhia nyob rau hauv ib tug scale ntawm {{0}} rau 100, qhov twg 0 sawv cev rau cov khoom mos mos heev thiab 100 sawv cev rau tag nrho rigidity.

 

Mohs hardness

Mohs hardness feem ntau yog siv los kuaj cov khoom siv ntxhia thiab cov khoom siv ceramic, tab sis qee zaum nws kuj tseem muaj feem cuam tshuam rau kev kuaj cov khoom siv roj hmab. Mohs hardness txawv ntawm ob txoj kev saum toj no nyob rau hauv uas nws yog raws li lub peev xwm ntawm cov ntaub ntawv sib txawv los khawb ib leeg.