Video: Thawj qhov ntsia hlau siv rau dab tsi?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Thaum ntxov screws tau ua los ntawm ntoo thiab yog siv nyob rau hauv wine presses, txiv ntseej roj presses, thiab nias khaub ncaws. Hlau ntsia hlau thiab txiv ntseej siv kom ceev ob yam khoom ua ke ua ntej tshwm sim nyob rau hauv lub xyoo pua kaum tsib.
Raws li, lub hau ntswj tau siv rau dab tsi?
Lawv muaj corkscrew-shaped ridge, hu ua xov, qhwv ib ncig ntawm lub tog raj kheej. Lub taub hau yog tshwj xeeb zoo li tus uas tso cai rau ib tug screwdriver los yog ciaj ntswj los tuav lub ntsia hlau thaum tsav tsheb hauv. Feem ntau siv cov screws yog tuav cov khoom ua ke - xws li ntoo - thiab rau qhov chaw khoom.
Qhov thib ob, thawj cov ntsia hlau threads raug txiav li cas? Screws tau kuj dav siv nyob rau hauv sib dhos armor. Thaum twg ntsia hlau muab tso rau hauv cov hlau lawv xov yuav tsum muaj kev ncaj ncees kom haum rau qhov tau txais xov . Cov no screws ua tsim los ntawm ua ntej hammering tawm lub taub hau thiab shank thiab ces txiav tus xov siv tus tuag hu ua a ntsia hlau phaj.
Tom qab ntawd, lo lus nug yog, yuav ua li cas cov ntsia hlau siv nyob rau hauv ancient sij hawm?
Thawj cov ntaub ntawv ntawm ib tug dej ntsia hlau , los yog ntsia hlau pump, hnub rov qab mus rau Ancient Egypt ua ntej xyoo pua 3 BC. Cov neeg Iyiv ntsia hlau , siv nqa dej los ntawm lub Nile, yog tsim los ntawm cov hlab ntsha ncig ib lub tog raj kheej; Raws li tag nrho cov chav rotates, dej yog lifted nyob rau hauv lub kauv raj mus rau qhov siab dua.
Dab tsi yog invented thawj ntswj ntsia hlau thiab ntsia hlau?
Qhov loj innovation tuaj Txawm li cas los xij, hauv 1770 thaum Jesse Ramsden invented tus ntsia hlau txiav tshuab dhos uas tso cai ntau lawm ntawm ntsia hlau nrog qhov ntau thiab tsawg. Qhov no thawj ntsia hlau thiab ntswj ntsia hlau tau slotted ntswj ntsia hlau thiab hloov lub ntiaj teb mus ib txhis.
Pom zoo:
Puas yog nws zoo rau ntsia hlau rau hauv pem teb?
Lub qhov tsis tuaj yeem loj dua li ib feem peb ntawm qhov tob ntawm qhov joist, yog li qhov siab tshaj plaws qhov loj rau 2 × 12 joist (qhov loj me 1-1/2 x 11-1/4 in.) yog 3-3/4 nyob rau hauv. . Koj tuaj yeem laum lub qhov nyob qhov twg raws qhov ntev ntawm lub joist (thawj daim duab). Yog tias koj tau tsim I-joists, koj tuaj yeem laum qhov mus txog 1-1/2 nyob rau hauv
Dab tsi yog txoj kab uas hla yog qhov loj 12 ntsia hlau?
Teb Chaws Asmeskas Tshuab Screw Diameters Loj Thread Diameter Decimal Nearest Fractional #8 0.16' 5/32' #10 0.19' 3/16' #12 0.21' 7/32'
Kuv yuav tsum ntsia hlau los yog ntsia hlau kuv lub lawj?
Kkeilman Cov Lus Teb: Screws yog 'superior' fastener tshaj tus ntsia thawv (lawv muaj lub zog tensile zoo tshaj)-tshwj xeeb tshaj yog tias koj tab tom tham txog screwing down decking. Siv koj lub lawj piv txwv - koj yuav tsum siv cov ntsia hlau los txuas cov joists rau lub lawj thav duab tab sis siv cov ntsia hlau txhawm rau txhawm rau txhawm rau hauv decking nws tus kheej
Qhov twg yog ib qho piv txwv ntawm cov neeg siv khoom thawj qib lossis thawj tus neeg siv khoom?
Cov neeg siv khoom tseem ceeb cuam tshuam nrog cov neeg tsim khoom thiab cov neeg siv khoom thib ob. Lawv tuaj yeem cuam tshuam nrog cov decomposers, txawm tias feem ntau lawv yuav cuam tshuam nrog cov neeg tsim khoom / cov neeg siv khoom thib ob. Kab laum paj rwb, nas teb, kab nyom, thiab tus ntoo ntsaum yog tag nrho cov piv txwv ntawm cov neeg siv khoom thawj qib
Puas yog nws zoo siv cov ntsia hlau rau ntawm cov hlua khi?
Cov neeg tsim khoom pom zoo: Tsis txhob siv galvanized lawj screws lossis drywall screws rau nruab joist hangers. Cov screws tsis muaj lub shank loj thiab toughness los txhawb joist loads