Brazing Tus Me Craftsman rau Precision Joining

Brazing tsis yaj lub hauv paus hlau tab sis ua tiav kev koom nrog los ntawm melting low-melting-point brazing muab tub lim hlau los sau qhov khoob. Nws nta tiaj welds thiab me me deformation, ua rau nws haum rau vuam precision Cheebtsam, cov ntaub ntawv sib txawv, thiab complex qauv. Nws yog qhov tseem ceeb hauv kev lag luam xws li electronics, aerospace, thiab cov cuab yeej kho mob. Raws li lub melting point ntawm lub brazing muab tub lim hlau, brazing yog muab faib ua ob pawg: mos brazing thiab hard brazing.

(I) Mos Brazing: Qhov "Micro-Joining" rau cov khoom siv hluav taws xob

Mos brazing siv brazing muab tub lim hlau nrog melting point hauv qab 450 ° C. Feem ntau siv brazing muab tub lim hlau yog tin-lead alloy (tuaj yeem hloov los ntawm cov hlau lead-dawb tin alloy). Flux yog siv thaum lub sij hawm vuam kom tshem tawm cov oxide zaj duab xis thiab txo qhov nro ntawm qhov chaw. Nws yog qhov tsim nyog rau kev sib koom ua ke ntawm cov khoom siv hluav taws xob, Circuit Court boards, thiab cov yeeb nkab dej sib txuas, uas yog cov khoom siv hluav taws xob zoo tshaj plaws.

1. Soldering: Qhov "Basic Skill" rau Circuit Board Vuam

Lub hauv paus ntsiab lus: Cov hlau nplaum ua kom sov lub workpiece (kub 250-350 ° C), melting cov hlau tsis muaj hlau lead (melting point kwv yees li 227 ° C). Nyob rau hauv qhov kev txiav txim ntawm cov flux, lub molten tin nyob rau hauv qhov sib txawv ntawm cov khoom siv pins thiab Circuit Court board pads, ua ib tug solder sib koom tom qab txias.

Cov ntsiab lus ua haujlwm:

Pre-Welding Cleaning: Siv cov ntawv xuab zeb los txhuam cov pins thiab cov ntaub qhwv kom tshem tawm cov oxide txheej; so lub rooj tsavxwm Circuit Court nrog cawv kom tshem tawm cov roj stains thiab tsis txhob txias soldering.

Cov Cuab Yeej Cuab Yeej: Ua ntej, nqa lub taub hau hlau rau hauv kev sib cuag nrog cov khoom ua haujlwm (qhov sib txuas ntawm tus pin thiab lub ncoo). Tom qab cua sov rau 1-2 vib nas this, pub lub tin hlau. Tsis txhob tso cua sov ncaj qha rau lub tin hlau, uas yuav ua rau "txias soldering" (lub molten tin tsis ua kom ntub dej tag nrho ntawm lub workpiece).

Solder Joint Control: Tus nqi ntawm cov tin hlau yuav tsum "tsim txaus los sau qhov sib txawv yam tsis muaj dej ntws." Qhov sib koom ua ke yuav tsum yog "conical." Tsis txhob co cov khoom ua ntej txias kom tiv thaiv kev sib koom ua ke.

(II) Hard Brazing: Qhov "Txhim khu kev lees paub" rau High-Strength Precision Cheebtsam

Hard brazing siv brazing muab tub lim hlau nrog lub melting point saum 450 ° C. Feem ntau siv brazing fillers yog tooj liab-zinc alloy (brass brazing muab tub lim) thiab nyiaj-raws li alloy (silver brazing muab tub lim). Nws nta vuam kub thiab siab vuam lub zog, ua rau nws haum rau vuam high-strength precision Cheebtsam xws li tej cuab yeej, tshav kub exchangers, thiab aero-engine hniav.

Cov ntsiab lus ua haujlwm: Preheat lub hauv paus hlau ua ntej welding (kub 300-500 ° C) kom ntseeg tau tias tag nrho cov ntws ntawm lub brazing muab tub lim hlau; siv flux xws li borax thiab boric acid kom tshem tawm cov oxide zaj duab xis ntawm lub hauv paus hlau nto; ua kom txias txias tom qab vuam (xws li, muab tso rau hauv ib lub thawv rwb thaiv tsev) kom tiv thaiv cov kab nrib pleb los ntawm qhov sib txawv ntawm qhov kub thiab txias.

(III) Kev Xaiv Lub Tswv Yim thiab Kev Txhim Kho Cov Txheej Txheem ntawm Vuam Txoj Kev

Tau ntsib nrog ntau txoj kev vuam, yuav ua li cas xaiv cov cuab yeej tsim nyog raws li qhov xav tau tiag tiag yog tus yuam sij rau kev txhim kho vuam zoo thiab ua haujlwm zoo. Nyob rau tib lub sijhawm, nrog rau kev txhim kho kev lag luam thev naus laus zis, vuam tshuab kuj tseem hloov mus rau "kev txawj ntse thiab kev cog qoob loo."

(IV) Cov ntsiab lus tseem ceeb rau kev xaiv txoj kev vuam

Cov yam ntxwv ntawm lub hauv paus hlau: Rau cov hlau tsis muaj carbon tsawg, qhov tseem ceeb yog muab rau SMAW thiab CO₂ vuam; rau stainless hlau, TIG vuam thiab laser vuam yog nyiam; rau aluminium alloys, AC TIG vuam yog xaiv; rau cov khoom siv hluav taws xob, soldering yog siv.

Cov khoom yuav tsum tau: Rau precision Cheebtsam (xws li aerospace qhov chaw), laser vuam thiab TIG vuam yog xaiv; rau pawg tsim khoom.