PCBA processing, mu SMT uye DIP plug-in soldering, pamusoro pemajoini solder ichava residual mamwe flux rosin, etc .. Zvisaririra zvine zvinoparadza zvinhu, zvakasara mu pcba pad zvinoriumba pamusoro, zvinogona kukonzera leakage, pfupi dunhu uye nokudaro. kukanganisa hupenyu hwechigadzirwa.Izvo zvakasara zvakasviba, hazvienderane nezvinodiwa zvehutsanana hwechigadzirwa, saka pcba inoda kucheneswa isati yatumirwa.Zvinotevera kutora iwe kunzwisisa kugadzirwa muitiro pcba mvura kugeza mamwe mazano uye zvokungwarira.
Neiyo miniaturization yezvigadzirwa zvemagetsi, magetsi emagetsi density, kudiki nzvimbo, kuchenesa kwave kuoma, mukusarudza nzira yekuchenesa, zvinoenderana nerudzi rwesolder paste uye flux, kukosha kwechigadzirwa, zvinodiwa nemutengi pakuchenesa mhando. kusarudza.
I. PCBA yekuchenesa nzira
1. Kuchenesa mvura yakachena: spray kana dip wash
Kuchenesa mvura yakachena ndiko kushandisa mvura yakasvibiswa, spray kana dip wash, yakachengeteka kushandisa, yakaoma mushure mekuchenesa, kuchenesa uku kunodhura uye kwakachengeteka, asi zvimwe zvakapambwa hazvisi nyore kubvisa.
2. Semi-yakachena mvura yekuchenesa
Semi-mvura kucheneswa ndiko kushandiswa kwezvinonyungudutsa zvinonyungudutsa uye mvura yakasvibiswa, iyo inowedzera mamwe maajenti anoshanda, anowedzera kuumba agent yekuchenesa, iyi inochenesa ine organic solvents, yakaderera toxicity, kushandiswa kwakachengeteka, asi kugezesa nemvura, uye wozoomesa. .
3. Ultrasonic kuchenesa
Iko kushandiswa kwe-ultra-high frequency mune yemvura yepakati kuita kinetic simba, kuumbwa kweasingaverengeke mabhuru madiki achirova pamusoro pechinhu, kuitira kuti nzvimbo yetsvina ibve, kuitira kuti iwane mhedzisiro yekuchenesa tsvina, inoshanda zvakanyanya. , asiwo kuderedza kukanganiswa kwe electromagnetic.
II.PCBA yekuchenesa tekinoroji zvinodiwa
1. PCBA surface welding components pasina zvakakosha zvinodiwa, zvigadzirwa zvose zvinogona kushandiswa kuchenesa bhodhi rePCBA nemishonga yakakosha yekuchenesa.
2. Zvimwe zvikamu zvemagetsi zvinorambidzwa kusangana nemushandi wekuchenesa, zvakadai se: key switches, network socket, buzzer, masero ebheteri, LCD kuratidza, zvikamu zvepurasitiki, lenses, nezvimwewo.
3. Nzira yekuchenesa, haigoni kushandisa tweezers uye mamwe simbi yakananga kuonana nePCBA, kuitira kuti irege kukuvadza PCBA bhodhi pamusoro, kukwenya.
4. PCBA pashure components soldering, flux residue nekufamba kwenguva achabudisa ngura muviri kuita, inofanira kucheneswa nokukurumidza sezvinobvira.
5. PCBA kuchenesa inopedzwa, inofanira kuiswa muvheni inenge 40-50 madhigirii, mushure memaminitsi makumi matatu ekubika, uye wozobvisa bhodhi rePCBA mushure mekuoma.
III.PCBA yekuchenesa matanho
1. PCBA bhodhi pamusoro haigoni kuva residual flux, tin beads uye marara;pamusoro uye solder majoini haigoni kuva chena, grey phenomenon.
2. PCBA bhodhi pamusoro haigoni kunamira;kuchenesa kunofanira kupfeka electrostatic ruoko mhete.
3. PCBA inofanira kupfeka mask yekudzivirira isati yacheneswa.
4. yakacheneswa PCBA bhodhi uye isina kucheneswa PCBA bhodhi yakaiswa zvakasiyana uye yakamaka.
5. Iyo yakacheneswa PCBA board inorambidzwa kubata zvakananga kumusoro nemaoko.
Nguva yekutumira: Feb-24-2023