Brazing The Delicate Craftsman for Precision Joining

Brazing hainyungudise base simbi asi inowana kujoinha nekunyungudutsa yakaderera-inonyunguduka-poindi brazing yekuzadza simbi kuzadza mapundu. Iyo inoratidzira flat welds uye diki deformation, ichiita kuti ive yakakodzera kune welding chaiyo zvikamu, zvinhu zvakasiyana, uye zvimiro zvakaoma. Izvo zvakakosha muminda yakadai semagetsi, aerospace, uye michina yekurapa. Zvinoenderana nenzvimbo yekunyunguduka kwesimbi yekuzadza simbi, brazing yakakamurwa kuita mapoka maviri: nyoro yekubhuroka uye yakaoma brazing.

(I) Yakapfava Brazing: Iyo "Micro-Joining" yeElectronics Zvikamu

Yakapfava brazing inoshandisa brazing filler simbi ine painonyungudika iri pasi pe450°C. Iyo inowanzoshandiswa brazing filler simbi itin-lead alloy (zvishoma nezvishoma inotsiviwa ne lead-isina tin alloy). Flux inoshandiswa panguva yewelding kubvisa oxide mafirimu uye kuderedza kushushikana kwepasi. Inokodzera kujoinwa chaiko kwezvikamu zvemagetsi, mabhodhi edunhu, uye majoini epombi yemvura, pakati peiyo solder ndiyo yakanyanya kupfava tekinoroji.

1. Soldering: "Basic Skill" yeCircuit Board Welding

Nheyo: Simbi inodziya inopisa iyo workpiece (tembiricha 250-350 ° C), ichinyungudutsa waya isina mutobvu (inonyungudika inenge 227 ° C). Pasi pechiito chekuyerera, tini yakanyungudutswa inozadza mukaha pakati pechikamu chepini nemapadhi ebhodhi redunhu, ichigadzira mubatanidzwa we solder mushure mekutonhora.

Operational Points:

Pre-Welding Kucheneswa: Shandisa sandpaper kupurudzira chikamu mapini nemapadhi kubvisa oxide layer; pukuta bhodhi redunhu nedoro kuti ubvise mavara emafuta uye udzivise kutonhora.

Heating Technique: Chekutanga, hunza iyo solder iron tip kuti ibatane neiyo workpiece (kusangana kwepini uye padhi). Mushure mekupisa kwemasekonzi 1-2, fudza waya waya. Dzivisa kupisa zvakananga waya yetini, iyo inogona kukonzera "inotonhora solder" (tini yakanyungudutswa inotadza kunyatsonyorovesa workpiece).

Solder Joint Control: Huwandu hwetambo waya hunofanirwa "kukwana kuzadza gap pasina kufashukira." Iyo solder joint inofanira kuva "conical." Usazunungusa chikamu chisati chatonhodza kudzivirira solder joint breakage.

(II) Hard Brazing: Iyo "Yakavimbika Guarantee" Yepamusoro-Simba Precision Zvikamu

Hard brazing inoshandisa brazing filler simbi ine painonyungudika iri pamusoro pe450°C. Anowanzo shandiswa brazing fillers ndeyemhangura-zinc alloy (brass brazing filler) uye sirivheri-based alloy (silver brazing filler). Iyo inoratidzira tembiricha yewelding yakakwira uye yakakwira weld simba, ichiita kuti ive yakakodzera kune welding yakakwirira-simba chaiyo zvinhu zvakadai sekucheka maturusi, kupisa kupisa, uye aero-injini blades.

Operational Points: Preheat the base metal before welding (tembiricha 300-500 ° C) kuti uve nechokwadi chekuyerera kwakazara kwesimbi yekuzadza simbi; shandisa flux yakadai seborax uye boric acid kuti ubvise firimu yeoxide panheyo yesimbi; ita kutonhora kunonoka kurapwa mushure mekugadzirisa (semuenzaniso, kuisa mubhokisi rekudzivirira) kudzivirira kutsemuka kunokonzerwa nekusiyana kwekushisa kwakanyanya.

(III) Select Strategy and Development Trends of Welding Methods

Kutarisana nemhando dzakasiyana-siyana dzekushongedza, nzira yekusarudza tekinoroji yakakodzera zvinoenderana nezvinodiwa chaizvo ndiyo kiyi yekuvandudza kunaka kwewelding uye kugona. Panguva imwecheteyo, nekuvandudza tekinoroji yeindasitiri, tekinoroji yewelding iri kusimukira yakanangana ne "njere uye greenization."

(IV) Zvinhu Zvikuru zveWelding Method Selection

Base Metal Characteristics: Kune yakaderera-kabhoni simbi, zvakakosha zvinopihwa kune SMAW uye CO₂ welding; yesimbi isina tsvina, TIG welding uye laser welding inosarudzwa; nokuda kwealuminium alloys, AC TIG welding inosarudzwa; nokuda kwezvikamu zvemagetsi, soldering inoshandiswa.

Zvido zveChigadzirwa: Nezvechokwadi zvikamu (zvakadai seaerospace parts), laser welding uye TIG welding inosarudzwa; yezvikamu zvinogadzirwa-zhinji.