"Kuchenesa" kunowanzoregeredzwa muPCBA kugadzira mabhodhi edunhu, uye inofungidzirwa kuti kuchenesa haisi nhanho yakakosha. Zvisinei, nekushandiswa kwenguva refu kwechigadzirwa padivi remutengi, matambudziko anokonzerwa nekusashanda kwekuchenesa mukutanga kwekutanga kunokonzera kukanganisa kwakawanda, kugadzirisa kana Izvo zvakarangarirwa zvigadzirwa zvakakonzera kuwedzera kwakanyanya kwemari yekushandisa. Pazasi, Heming Technology ichatsanangura muchidimbu basa rePCBA yekuchenesa yemabhodhi edunhu.
Iyo nzira yekugadzira yePCBA (yakadhindwa gungano redunhu) inopfuura nematanho akawanda ekuita, uye nhanho imwe neimwe yakasvibiswa kune madhigirii akasiyana. Naizvozvo, dhipoziti dzakasiyana-siyana kana tsvina inoramba iri pamusoro pedare redunhu PCBA. Izvi zvinosvibisa zvichaderedza chigadzirwa Performance, uye kunyange kukonzera chigadzirwa kukundikana. Semuenzaniso, mukugadzirisa kwekutengesa zvinhu zvemagetsi, solder paste, flux, nezvimwewo zvinoshandiswa pakubatsira solder. Mushure mekutengesa, zvakasara zvinogadzirwa. Zvisaririra zvine organic acids uye ayoni. Pakati pavo, organic acids inoparadza bhodhi redunhu PCBA. Kuvapo kweiyoni yemagetsi kunogona kukonzera kupfupika kwedunhu uye kuita kuti chigadzirwa chikundikane.
Kune akawanda marudzi ezvinosvibisa pane redunhu bhodhi PCBA, iyo inogona kupfupikiswa muzvikamu zviviri: ionic uye isiri-ionic. Ionic zvinosvibisa zvinosangana nehunyoro munharaunda, uye electrochemical migration inoitika mushure mekugadzirwa kwemagetsi, kuumba dendritic chimiro, zvichikonzera nzira yakaderera yekudzivirira, uye kuparadza PCBA basa redunhu redunhu. Zvisina-ionic zvinosvibisa zvinogona kupinda mukati me insulating layer yePC B uye kukura dendrites pasi pepamusoro pePCB. Kuwedzera kune ionic uye isiri-ionic zvinosvibisa, kune zvakare granular zvinosvibisa, senge solder mabhora, anoyangarara mapoinzi mune solder bath, guruva, guruva, etc. Izvi zvinosvibisa zvinogona kuita kuti kunaka kwemajoini solder kuderedzwa, uye solder. majoini anorodzwa panguva ye soldering. Zvinhu zvakasiyana-siyana zvisingadiwe senge pores uye mapfupi maseketi.
Nezvinosvibisa zvakawanda, ndezvipi zviri kunyanya kunetseka? Flux kana solder paste inowanzoshandiswa mune reflow soldering uye wave soldering maitiro. Izvo zvinonyanya kuumbwa nezvinonyungudutsa, wetting agents, resins, corrosion inhibitors uye activators. Zvigadzirwa zvakagadziridzwa zvine thermally zvinosungirwa kuvepo mushure mekutengesa. Izvi zvinhu Panyaya yekutadza kwechigadzirwa, post-welding residues ndiyo inonyanya kukosha inokanganisa kunaka kwechigadzirwa. Ionic zvisaririra zvinogona kukonzera electromigration uye kuderedza insulation kuramba, uye rosin resin zvisaririra zviri nyore adsorb Guruva kana tsvina kukonzera kusangana kuramba kuwedzera, uye mumatambudziko akakomba, zvinozoita kuvhurika kutadza kwedunhu. Naizvozvo, kucheneswa kwakasimba kunofanirwa kuitwa mushure mekunama kuti ive nechokwadi chemhando yebhodhi redunhu PCBA.
Muchidimbu, kucheneswa kwebhodhi redunhu PCBA kwakakosha. "Kuchenesa" inzira yakakosha yakanangana nemhando yebhodhi redunhu PCBA uye inokosha.