Me me Steel Hex Head DIN571 Ntoo Ntsia Hlau rau Ntoo
Ib tug ntsia hlau yog ib hom ntawm khawm ris, nyob rau hauv ib co txoj kev xws li ib tug ntsia liaj qhov rooj, feem ntau ua los ntawm cov hlau, thiab yus los ntawm ib tug helical caj, lub npe hu raws li ib tug txiv neej xov (lwm xov). Screws yog siv los khuam ntaub ntawv los ntawm kev khawb nyob rau hauv thiab wedging rau hauv ib cov ntaub ntawv thaum muab, thaum lub xov txiav grooves nyob rau hauv lub fastened cov khoom uas tej zaum pab rub fastened ntaub ntawv ua ke thiab tiv thaiv kom txhob pull-out. Muaj ntau ntau screws rau ib tug ntau yam ntawm cov ntaub ntawv; cov neeg feem ntau fastened los ntawm screws xws li ntoo, daim ntawv hlau, thiab yas.
Ib tug ntsia hlau yuav feem ntau yog muaj ib tug lub taub hau nyob rau hauv ib tug kawg uas muaj ib tug qhia tshwj xeeb uas tsim duab uas tso cai rau nws yuav tsum muab, los yog tsav , nrog ib lub cuab tam. Common cov cuab yeej rau tsav screws xws li screwdrivers thiab wrenches. Lub taub hau yog feem ntau loj tshaj lub cev ntawm lub ntsia hlau, uas ua rau cov ntsia hlau los yog tsav tob tshaj qhov ntev ntawm lub ntsia hlau thiab muab ib tug kabmob nto.
Ntoo ntsia hlau:
Early ntoo screws twb tau los ntawm txhais tes, nrog ib tug series ntawm cov ntaub ntawv, Chisels, thiab lwm yam tej cuab yeej, thiab cov no yuav tsum pom tau yooj yim los ntawm sau cia cov lus yov thiab zoo ntawm lub threads, raws li zoo raws li cov ntaub ntawv qhab nia seem ntawm lub taub hau ntawm lub ntsia hlau thiab nyob rau hauv lub cheeb tsam ntawm threads. Muaj ntau ntawm cov screws muaj ib tug blunt kawg, tag tsis ntse tapered taw tes rau ze li ntawm tag nrho cov niaj hnub ntoo screws. Nws thiaj li, lathes tau siv los tsim ntoo screws, nrog rau cov earliest patent raug kaw nyob rau hauv 1760 nyob rau hauv ces. Thaum lub sij hawm lub 1850s swaging cov cuab yeej tsim los muab ib tug ntau yam thiab zoo ib yam thread. Screws ua nrog cov cuab yeej muaj sib npaug nram hav uas ntse ntse thiab ntxhib threads. Ib txhia ntoo screws tau ua nrog txiav hnub raws li thaum ntxov raws li lub caij 1700s (tejzaum nws txawm ua ntej 1678 thaum phau ntawv cov ntsiab lus twb xub luam tawm nyob rau hauv qhov chaw).
Thaum ntsia hlau tig machines twb nyob rau hauv kev siv, feem ntau muag muaj ntoo screws tau ua nrog rau cov qauv. Cov txiav ntoo screws yog luag tsis tapered, thiab txawm tias thaum lub tapered shank yog tsis cuab kev, lawv yuav tau discerned vim hais tias cov threads tsis cuag yav dhau los lub lub cheeb ntawm lub shank. Tej screws yog zoo tshaj plaws ntsia tom qab drilling ib tsav qhov uas muaj ib tug tapered xyaum me ntsis. Feem ntau ntawm niaj hnub ntoo screws, tsuas yog rau cov neeg ua los ntawm tooj dag, yog tsim nyob rau xov dov cav tov. Cov screws muaj ib qhov txoj kab uas hla, threads nrog ib tug loj lub cheeb tshaj lub shank, thiab muaj zog vim hais tias cov dov txheej txheem tsis txiav lub grain ntawm cov hlau.
Tej uas yuav tsum tau thov hu rau peb.
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