Nekufambira mberi kwesainzi uye tekinoroji, nharembozha, macomputer epatablet uye zvimwe zvigadzirwa zvemagetsi zvakareruka, zvidiki, zvinotakurika kune yekusimudzira maitiro, muSMT kugadzirisa zvinhu zvemagetsi zviri kuitawo zvidiki, izvo zvaimbova 0402 capacitive zvikamu zvakare nhamba huru. ye0201 saizi yekutsiva.Nzira yekuita sei hutano hwemajoini ekutengesa yakave nyaya inokosha ye-high-precision SMD.Solder majoini sebhiriji rekushongedza, kunaka kwayo uye kuvimbika kunosarudza kunaka kwezvigadzirwa zvemagetsi.Mune mamwe mazwi, mukugadzirwa kwekugadzirwa, hutano hweSMT hunozopedzisira huchiratidzwa muhutano hwemajoini ekutengesa.
Parizvino, mumhizha yemagetsi, kunyange zvazvo tsvakurudzo ye-lead-free solder yakafambira mberi zvikuru uye yakatanga kukurudzira kushandiswa kwayo munyika yose, uye nyaya dzezvakatipoteredza dzave dzichinyanya kunetseka pamusoro, kushandiswa kweSn-Pb solder alloy soft brazing teknolojia. ikozvino ichiri huru yekubatanidza tekinoroji yemagetsi maseketi.
Iyo yakanaka solder yekubatanidza inofanirwa kunge iri muhupenyu hwechishandiso, iyo mechanical uye magetsi emagetsi haisi kukundikana.Kuonekwa kwayo kunoratidzwa se:
(1) Nzvimbo yakakwana uye yakatsetseka inopenya.
(2) Nhamba yakakodzera ye solder uye solder kuti ivhare zvachose mapepa uye inotungamira yezvikamu zvakatengeswa, chikamu chekukwirira chiri pakati.
(3) kunyorova kwakanaka;mupendero wenzvimbo yekutengesa inofanira kunge yakatetepa, solder uye pad pamusoro wetting angle ye300 kana zvishoma yakanaka, iyo yakawanda haipfuure mazana matanhatu.
SMT kugadzirisa chimiro chekuongorora zvemukati:
(1) kana zvikamu zvacho zvisipo.
(2) Kana izvo zvikamu zvakanamirwa zvisirizvo.
(3) Hapana dunhu pfupi.
(4) kana rakapotsa welding;virtual welding zvikonzero zvakaoma.
I. kutongwa kwekunyepera kwenhema
1. Kushandiswa kwe online tester yakakosha michina yekuongorora.
2. Kuona kanaAOI kuongorora.Kana majoini solder akaonekwa kuva shoma solder wetting zvakaipa, kana solder majoini pakati kuputsika musono, kana solder pamusoro akanga convex bhora, kana solder uye SMD regai kutsvoda Fusion, etc., tinofanira kuteerera, kunyange kana chiitiko chengozi shoma yakavanzwa, inofanira kuona pakarepo kana pane batch yematambudziko ekutengesa.Mutongo ndewekuti: ona kana PCB yakawanda panzvimbo imwechete yemajoini e solder ine matambudziko, akadai sematambudziko ega ega ePCB, anogona kunge ari solder paste anokwenya, pini deformation uye zvimwe zvikonzero, senge muPCB mazhinji panzvimbo imwechete ane matambudziko, panguva ino inogona kunge iri chikamu chakaipa kana dambudziko rinokonzerwa nepadhi.
II.Zvikonzero uye mhinduro kune virtual welding
1. Yakaremara padhi dhizaini.Kuvapo kwepaburi-padhi ndiko kukanganisa kukuru mukugadzirwa kwePCB, haufaniri, usashandise, kuburikidza-gomba kuchaita kurasikirwa kwekutengesa kunokonzerwa nekusakwana solder;pad spacing, nzvimbo inodawo kuve yakajairwa mechi, kana inofanirwa kugadziriswa nekukurumidza sezvinobvira kugadzira.
2. PCB board ine oxidation phenomenon, kureva kuti, padhi haina kupenya.Kana chiitiko che oxidation, rubber inogona kushandiswa kupukuta iyo oxide layer, kuitira kuti inopenya zvakare.pcb bhodhi mwando, akadai anofungidzirwa anogona kuiswa muovheni yokuomesa kuomesa.pcb bhodhi ine mafuta mavara, dikita mavara uye kumwe kusvibiswa, nguva ino kushandisa anhydrous ethanol kuchenesa.
3. Yakadhindwa solder paste PCB, solder paste inokweshwa, kukwizwa, kuitira kuti uwandu hwe solder paste pamapedhi akakodzera kuderedza huwandu hwekutengesa, kuitira kuti solder isakwana.Inofanira kugadzirwa nenguva.Nzira dzekuwedzera dziripo dispenser kana tora zvishoma nebamboo stick kuti ugadzirise iyo yakazara.
4. SMD (surface-mounted components) yehurombo husina kunaka, kupera, oxidation, deformation, zvichiguma nekutengesa kwenhema.Ichi ndicho chikonzero chakajairika.
Oxidised components hazvisi kupenya.Kunyungudika kweokisidhi kunowedzera.
Panguva ino ine madhigirii anodarika mazana matatu emagetsi echromium iron pamwe nerosin-type flux inogona kuiswa welded, asi iine madhigirii anopfuura mazana maviri eSMT reflow soldering pamwe nekushandiswa kweisingaparadzi isina-yakachena solder paste kuchanetsa melt.Naizvozvo, oxidised SMD haifanirwe kutengeswa nevira reflow.Tenga zvikamu zvinofanirwa kuona kana paine oxidation, uye tenga kudzoka nenguva yekushandisa.Saizvozvo, oxidised solder paste haigone kushandiswa.
Nguva yekutumira: Aug-03-2023