Me Hlau Fasteners

Kev tsim cov hlau me me feem ntau siv ntau -chaw nres tsheb txias taub hau txheej txheem. Cov hlua hlau yog tsim nyob rau hauv ib kauj ruam dhau los ntawm cov txheej txheem xws li txiav, ua ntej - taub hau, kawg taub hau thiab xov dov. Kev siv cov khoom siv yog siab tshaj li 92%, uas yog kwv yees li 30% siab dua li ntawm kev txiav. Raws li ASTM E18 Rockwell hardness test, qhov hardness ntawm lub fastener tom qab txias taub hau hardening tuaj yeem ncav cuag HRC 38 txog 42, thaum lub hauv paus hardness tseem nyob ntawm HRC 28 mus rau 32. Qhov hardness gradient no coj mus rau hauv tus account cov xov hnav tsis kam thiab cuam tshuam tsis kam. Qhov nto roughness ntawm dov threads tuaj yeem ncav cuag Ra 0.4 microns, thiab qhov tob ntawm cov txheej txheem kev ntxhov siab tsim tawm yog li 0.1 millimeter. Raws li ASTM E466 axial fatigue test, qhov qaug zog txwv ntawm dov threads yog kwv yees li 40% siab tshaj qhov txiav threads. Thaum qhov kev ntxhov siab amplitude yog 100 MPa, lub neej qaug zog tuaj yeem ncav cuag kaum lab lub voj voog. Qhov no ua rau me me fasteners muaj kev tiv thaiv zoo heev - tawg kev ntseeg siab nyob rau hauv siab - ceev lub cev muaj zog brackets los yog precision kis chains.

Rau cov huab cua ntub lossis tshuaj lom neeg, zinc -nickel alloy lossis Dacromet txheej tuaj yeem siv los hloov cov galvanizing ib txwm siv rau cov hlau me me kom txuas ntxiv lub voj voog tu. Raws li ASTM B117 nruab nrab ntsev tsuag tshuaj ntsuam, thaum zinc -nickel alloy txheej yog yim mus rau kaum ob microns tuab, nws yuav siv sij hawm ntau tshaj li ib txhiab teev rau thawj xim liab tshwm sim, thaum cov txheej txheem zinc txheej tsuas tuaj yeem kav ntev li plaub puas thiab yim caum teev, ntau dua li ob npaug ntawm kev tiv thaiv corrosion. Nyob rau tib lub sijhawm, raws li kev ntsuas kev sib txhuam coefficient tau teev tseg hauv DIN 946, kev sib txhuam coefficient ntawm Dacromet-coated fastener bearing nto yog ruaj khov nyob rau hauv thaj tsam ntawm 0.08 txog 0.14, uas yog qis dua li 0.15 txog 0.22 ntawm kev kho phosphating zoo tib yam. Qhov no yuav txo tau cov dispersion ntawm nruj torque thiab tswj lub sib dhos pretightening quab yuam sib txawv nyob rau hauv ntxiv los yog rho tawm yim feem pua. Tsis tas li ntawd, cov txheej txheem no tseem tuaj yeem tswj xyuas cov tshuaj lom neeg ruaj khov ntawm qhov kub ntawm 200 degrees Celsius thiab tsim nyog rau kev sib txuas ntawm lub cav los yog HVAC cov cuab yeej, uas tsis yog tsuas yog ua tau raws li kev tiv thaiv kev tiv thaiv corrosion, tab sis kuj tseem siv rau hauv kev tswj xyuas kev sib dhos.

Tau txais cov duab kos los ntawm cov neeg siv khoom lossis tsim cov duab kos raws li lawv cov kev qhia tshwj xeeb lossis cov qauv.

Cov duab kos, cov khoom siv raw, kev kho saum npoo, thiab lwm cov ntsiab lus tau lees paub los ntawm ob tog.

Muab cov lus tsocai, lees paub qhov kev txiav txim kom muaj nuj nqis, thiab suav nrog tag nrho cov ntaub ntawv ntsig txog.

Zoo li cov nqe lus ntawm kev them nyiaj, cov nqe lus ntawm kev lag luam, hom ntim, thiab lwm yam.

Thaum tsim cov khoom, ua raws li cov qauv kos duab thiab qauv.

Tom qab qhov kev tshuaj ntsuam zaum kawg, nws tau raug ntim thiab xa mus rau cov neeg siv khoom.

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