Mamiriro ezvinhu anodiwa ekutengesa PCBmapuranga edunhu

1.The weldment inofanira kuva yakanaka weldability

Iyo inonzi solderability inoreva kushanda kwealloy kuti simbi inosungirirwa uye solder inogona kuumba musanganiswa wakanaka pane yakakodzera tembiricha. Haasi ese masimbi ane zvakanaka weldability. Dzimwe simbi, dzakadai sechromium, molybdenum, tungsten, nezvimwewo, dzine hurombo hwakanyanya; mamwe masimbi, akadai semhangura, ndarira, nezvimwewo, ane weldability zviri nani. Munguva yewelding, tembiricha yepamusoro inokonzera kuti firimu reoxide riumbe pamusoro pesimbi, izvo zvinokanganisa weldability yechinhu. Kuti uvandudze solderability, pamusoro petin plating, sirivheri plating uye mamwe matanho anogona kushandiswa kudzivirira oxidation yechinhu chepamusoro.

2.Pamusoro peiyo weldment inofanira kuchengetedzwa yakachena

Kuti uwane musanganiswa wakanaka we solder uye weldment, iyo welding surface inofanira kuchengetedzwa yakachena. Kunyangwe kune weldments ane yakanaka weldability, oxide mafirimu uye mafuta mavara anokuvadza kunyorova anogona kugadzirwa pamusoro peiyo weldment nekuda kwekuchengetedza kana kusvibiswa. Iyo firimu yetsvina inofanirwa kubviswa isati yatungirwa, kana zvisina kudaro iyo welding mhando haigone kuvimbiswa. Mild oxide layers panzvimbo dzesimbi dzinogona kubviswa nekuyerera. Metal surfaces ine oxidation yakaoma inofanira kubviswa nemichina kana makemikari nzira, zvakadai sekukwenya kana pickling.

3.Shandisa zvakakodzera flux

Basa rekuyerera ndeyekubvisa iyo oxide firimu pamusoro peiyo weldment. Nzira dzakasiyana dzekushongedza dzinoda ma fluxes akasiyana, senge nickel-chromium alloy, simbi isina tsvina, aluminium uye zvimwe zvinhu. Zvakaoma kutengesa pasina yakatsaurwa yakakosha flux. Kana welding chaiyo zvigadzirwa zvemagetsi senge akadhindwa edunhu mabhodhi, kuitira kuti welding yakavimbika uye yakagadzikana, rosin-based flux inowanzoshandiswa. Kazhinji, doro rinoshandiswa kunyungudutsa rosin mumvura yerosin.

4. Iyo weldment inofanira kupiswa kune tembiricha yakakodzera

Munguva yewelding, basa resimba rinopisa nderokunyungudutsa solder uye kupisa chinhu chewelding, kuitira kuti tin nemaatomu emutobvu awane simba rakakwana kuti ripinde mucrystal lattice iri pamusoro pesimbi kuti ishorwe kuti iite alloy. Kana kupisa kwekushisa kwakanyanya kuderera, kuchava kukanganisa kupinda kweatomu solder, zvichiita kuti zvisingakwanisi kuumba alloy, uye zviri nyore kugadzira solder yenhema. Kana tembiricha yewelding yakakwira zvakanyanya, solder ichange iri mune isiri-eutectic state, ichimhanyisa kuparara uye volatilization mwero wekuyerera, zvichiita kuti kunaka kweiyo solder kuve kwakashata, uye mumatambudziko akaoma, Inogona kukonzera mapedhi pane zvakadhindwa. bhodhi redunhu kudonha. Chinofanira kusimbiswa ndechokuti kwete chete solder inofanira kupisa kuti inyunguduke, asi iyo weldment inofanirawo kupiswa kune kutonhora kunogona kunyungudutsa solder.

5. Yakakodzera welding nguva

Welding nguva inoreva nguva inodiwa pakuchinja kwemuviri uye kemikari panguva yese yewelding process. Zvinosanganisira nguva yekuti simbi isimbiswe kuti isvike pakupisa, nguva yekunyunguduka kwesolder, nguva yekuti kuyerera kushande uye nguva yekuti simbi igadzirwe. Mushure mekunge tembiricha yewelding yatemwa, nguva yakakodzera yewelding inofanirwa kutariswa zvichienderana nechimiro, hunhu, uye hunhu hwezvikamu zvinosungirirwa. Kana nguva yekuputika yakanyanyisa, zvikamu kana zvikamu zvekugadzira zvichange zvichikuvadzwa nyore nyore; kana nguva yekugadzira ipfupi, zvinodiwa zvekushongedza hazvizozadzikiswe. Kazhinji, nguva yakawanda yejoini yega yega solder kuti isungirwe haipfuuri masekonzi mashanu.