Kev ntsuas los tiv thaiv cov pa taws thiab plua plav paug thaum lub tshuab hluav taws xob vuam
Cov pa luam yeeb muaj cov khoom siv loj thiab muaj cov tshuaj lom me me, xws li manganese, uas tuaj yeem ua rau manganese lom ntawm cov welders, tsis muaj zog tiv thaiv, thiab groggy txhua hnub. Lawv nrhiav tsis tau ib yam dab tsi hauv tsev kho mob, yog li ntawd lawv tsuas tuaj yeem so hauv tsev thiab muab tso rau hauv tsuas yog thaum cov co toxins raug ntxuav kom nws rov zoo.
Kev ua haujlwm pneumoconiosis ntawm welders yog tshwm sim los ntawm kev cuam tshuam rau cov pa luam yeeb thiab plua plav mus ntev. Raws li kev txheeb cais tsis tiav, qhov tshwm sim ntawm kev txom nyem los ntawm pneumoconiosis yog 60 feem pua tom qab vuam rau ntau tshaj 20 xyoo.
Cov kev ntsuas tseem ceeb los tiv thaiv cov pa taws thiab plua plav paug muaj xws li:
1. Cov qhov ncauj qhov ntswg tiv thaiv tus qauv, xws li N95 qhov ncauj qhov ntswg, yuav tsum tau hnav nyob rau hauv ib puag ncig zoo tib yam.
2. Rau vuam nyob rau hauv ib qho chaw me me hauv qhov chaw kaw, koj yuav tsum hnav lub npog ntsej muag lossis lub npog ntsej muag roj.
3. Qhov chaw ua haujlwm yuav tsum muaj cov chaw ua pa, cov khoom siv tiv thaiv ib puag ncig, cov pa hluav taws xob thiab cov khoom siv kom huv si, thiab cov pa luam yeeb hauv tsev thiab cov plua plav yuav tsum tsis txhob siab tshaj lub teb chaws tus qauv.
Dab tsi yog cov haujlwm ntawm rosin hauv hluav taws xob vuam
Rosin yog siv los ua flux nyob rau hauv vuam thiab ua raws li ib tug flux.
Lub melting point ntawm flux yog qis dua li ntawm solder, thiab nws qhov tshwj xeeb lub ntiajteb txawj nqus, viscosity, thiab nto nro yog me dua li ntawm solder. Thaum lub sij hawm soldering, lub flux melts ua ntej, thiab sai sai ntws thiab npog lub nto ntawm lub solder, uas plays lub luag hauj lwm ntawm cais cov huab cua thiab tiv thaiv oxidation ntawm hlau nto. Nyob rau hauv qhov kub thiab txias, nws reacts nrog oxide zaj duab xis nyob rau saum npoo ntawm lub solder thiab cov hlau yuav tsum tau welded rau yaj nws thiab restore lub ntshiab hlau nto. Tsim nyog soldering tin pab tsim kom txaus siab solder sib koom ua ke zoo thiab tuav lub ntsej muag gloss ntawm cov pob qij txha.
Yog tias nws yog lub rooj tsav xwm luam tawm tshiab, thov ib txheej ntawm rosin naj hoom rau saum npoo ntawm daim ntawv tooj liab ua ntej soldering. Yog hais tias nws yog ib tug npaj Circuit Court board, nws yuav ncaj qha soldered.
Siv rosin raws li tus kheej cwj pwm. Qee tus neeg poob lub taub hau ntawm cov hlau hauv rosin tom qab soldering ib feem, thiab qee cov neeg poob ib co rosin ntawm lub taub hau hlau thaum nws yog oxidized thiab tsis yooj yim siv.
Kev siv rosin yog qhov yooj yim. Qhib lub rosin lub thawv thiab poob lub ntsis ntawm lub zog soldering hlau rau nws.
Yog tias cov tub ntxhais cov khoom siv tau siv rau kev sib tsoo, qee cov rosin yuav tsum tau ntxiv; Yog tias rosin tin soldering hlau yog siv (flux yog qhwv hauv cov tub ntxhais hlau), rosin yuav tsis siv.
Thaum cov hlau nto nyob rau hauv kev sib cuag nrog huab cua, ib txheej ntawm oxide zaj duab xis yuav raug tsim. Qhov kub siab dua, qhov hnyav dua qhov oxidation. Flux yog ib yam khoom tshwj xeeb uas siv los tshem tawm oxide zaj duab xis, tseem hu ua flux.
Peb lub luag haujlwm ntawm flux:
1. Tshem tawm cov oxide zaj duab xis: Cov khoom nyob rau hauv lub flux undergoes ib tug txo cov tshuaj tiv thaiv kom tshem tawm cov oxide zaj duab xis, thiab cov tshuaj tiv thaiv cov khoom yuav raug tshem tawm slag, uas floats rau saum npoo ntawm solder.
2. Tiv thaiv oxidation: Tom qab cov rosin melted, nws ntab rau saum npoo ntawm lub solder los tsim ib txheej cais thiab tiv thaiv oxidation ntawm soldering nto.
3. Txo qhov nro ntawm qhov chaw, ua kom cov dej ntws ntawm cov solder, thiab pab lub vuam kom ntub cov vuam.
