Yakadhindwa redunhu bhodhi, kunyanya idzo dzinoshandiswa mumaPADA (personal digital assistants) senge nhare mbozha, vari panjodzi yekushungurudzwa. In addition to collecting dust that can seep into the case of a phone, PCBS are also prone to soaking in or splashing out of liquids during daily use on e-book readers and similar handheld devices. Nekuda kweizvozvo, indasitiri yebasa yakabuda iyo inopa yekuchenesa nekugadzirisa masevhisi ePCBS yakasvibiswa, asi pasina kukuvara kwemuviri mumaPDA nemidziyo mikuru.

Cleaning printed circuit boards (PCBS) to repair high-purpose products is as delicate a process as making circuit boards. Kana nzira isiriyo yekuchenesa ikashandiswa, inogona kukuvadza kubatana, kusunungura zvinhu uye kukuvadza zvinhu. To avoid these defects, you need to take as much care in choosing the right cleaning method as you do in designing, specifying, and manufacturing boards.

Ndeipi misungo iyi? Zvinogona sei kudziviswa?

Pazasi, isu tichaongorora yakasimbiswa pcb yekuchenesa sarudzo uye zvimwe zvaungangoda kushandisa.

Mhando dzakasiyana dzekusvibisa

All kinds of pollutants can accumulate on PCBS. Using the right response to an annoying problem will be more effective and will reduce headaches.

Dota yakasviba (guruva, tsvina)

Imwe yemamiriro akajairika ndeyekuti guruva rinoungana mukati kana kutenderedza iyo PCB. Zvinyoronyoro shandisa diki, rakapfava bhurasho (senge bhizahair pendi bhurasho) kubvisa guruva risina kukanganisa zvinhu. Iko kune muganho kune iko kunyangwe iro diki bhurasho rinogona kusvika, senge pasi pechinhu.

Mhepo yakamanikidzwa inogona kusvika munzvimbo zhinji, asi inogona kukuvadza kubatana kwakakosha, saka hanya inofanira kutorwa kana uchiishandisa.

A specially designed vacuum cleaner for electronic components is also an option, but it is ubiquitous.

Zvinosvibisa mvura (tsvina, waxy mafuta, kubuda, soda)

High-temperature operations can turn certain wax-coated components into magnets for dust and dirt, resulting in sticky grime that can’t be removed with a brush or vacuum cleaner. Zvikasadaro, chigadzirwa chinozowana chinonamira soda uye kukanganisa mavhodhi. Either way, these substances should be addressed before they accumulate and affect performance.

Mazhinji matangi anogona kubviswa neanochenesa, senge isopropyl alcohol (IPA) uye q-matipi, madiki mabhurezi kana machira akachena ekotoni. Shandisa zvinwiwa zvakadai seIPA kuchenesa iyo PCB chete munzvimbo ine mweya inofefetera, kunyanya mune yemoto hood.

Iwe unogona kushandisa deionized mvura panzvimbo. Be sure to remove excess moisture and dry the plate properly (a few hours in a low oven will help remove any remaining moisture.)

In addition to IPA, there are many commercially available PCB cleaners, ranging from acetone to chemicals used to clean electronic equipment. Vakachenesa vakasiyana vanogona kubata nemhando dzakasiyana dzehutachiona, senge kuyerera kana wakisi. Keep in mind that harsh cleaners can remove marks from components or damage plastic or electrolytic capacitor jackets or other exotic components (such as humidity sensors), so make sure that the cleaner you use is not too strong. Kana uchikwanisa, haufanire kuyedza vanochenesa pazvinhu zvekare kana zvinongedzo kuti uve nechokwadi chekuti haukuvadze zvakanyanya.

Ultrasonic pcb yekuchenesa

Iko kushandiswa kwepamusoro frequency ultrasonic yekuchenesa muchina kunokonzera cavitation. Iko kushushikana kwechisimba kwemabhirioni emabhuru madiki mune yekuchenesa mhinduro iri mune yeiyo ultrasonic yekuchenesa tangi. Iwo matema anogadzirwa ne transducer yakanamatira kuzasi kwetangi uye vanofara nejenareta pane iyo ultrasonic frequency. Kuputika kwemafuro aya kuchapeputswa nemweya wakasviba kubva pamusoro yakachena yezvikamu.

Ultrassom inogona kutsanangurwa semasaisai mafungu ane masaizi ari pamusoro pemuganhu wepamusoro weyakajairika nzeve yekunzwa kwevanhu, kureva, ingangoita 20 kHz (20 kHz pasekondi kana makumi maviri mairi). Chokwadi, kurira kweiyo ultrasonic cleaner inogona kunzwika panguva yekushanda nekuda kwemhedzisiro yezvatinoti ultrasonic cavitation.

Iyo hunyanzvi inorasikirwa neakanakira ayo senzira yekuchenesa nekuti inogona kukonzeresa kukuvara kwechinhu kana kubatana kwakasununguka pamwe neguruva netsvina. Muchokwadi, NASA yakaburitsa rairo yekuti isashandise kuchenesa kweiyo ultrasonic nekuti inogona kusaziva ichikonzera zvikamu zvekupedzisira kuti zviparadzanise uye zvinyatso kukuvadza tambo dzekubatanidza mukati meIC uye iyo ultrasonic conduction yeiyo yekubatanidza waya pad simba kuburikidza neiyo IC inotungamira furemu.

Tazvitaura izvozvo, kuchine nzvimbo uko kunogona kuchenesa ultrasonic. Iyo ultrasonic yekuchenesa maitiro inogona kusvika kune akaomesesa, akaomarara-kusvika-nzvimbo nzvimbo pazasi peiyo yakakwira-density gungano pane akawanda matunhu edunhu redunhu. Iyi haisi iyo kesi yezvishandiso zveSMD zvine mipata midiki idiki pane iyo yekumanikidza kwepashure coefficient yemvura yekuchenesa. Nekudaro, maitiro acho anokurumidza, uye kune akawanda akakwira-vhoriyamu michina iyo inogona kubata yakawanda yakawanda yekuchenesa.

Pcb ultrasonic yekuchenesa muchina

Cavitation haisi nzira nyoro. Yakaverengerwa kuti tembiricha inopfuura zviuru gumi ° F uye kumanikidza kwakapfuura zviuru gumi zvePSI zvichagadzirwa panzvimbo inoputika yemabhuru emabhuru.

Ultrasonic cleaners inogona kuburitsa mafrifti anotangira pa25 kHz kusvika 100+ kHz, yakayerwa mumasekonzi pasekondi. Mashoma ezasi anoburitsa matema makuru eacavitation achienzaniswa nehafu yepamusoro. Makuru mabhuru anoputika zvakanyanya, semuenzaniso kubvisa zvakasvibisa kubva kune zvakagadzirwa nesimbi zvikamu. Mafambiro akakwirira anoburitsa madubhu madiki, zvichiita kuti bubble kuchenesa kupfava asi iwedzere kukwanisa kupaza mitswe, maburi nemakomba mapofu. Mafambiro epamusoro anoshandiswa kuchenesa nzvimbo dzakakwenenzverwa kana kusimba.

kugumisa

Kune makambani anoshanda nePCB yekuchenesa. Zvichienderana nezvido zvako (senge nhamba hombe yemapuranga, chii chinoda kucheneswa, uye mapango acho akasimba zvakadii), unogona kutsvaga sosi yekunze yekukodzera yekuzadzisa zvaunoda zvekuchenesa.

Kana iwe kazhinji uine matambudziko nemabhodhi anoda kucheneswa, panogona kunge paine zvimwe zvakakosha zvinhu zvekutarisa panguva yekugadzira kana yekugadzira maitiro.

Kuchenesa PCBS hakufanirwe kunge kuri basa rinotyisa. Kuchengeta matipi uye mazano ari pamusoro apa zvichabatsira kuona kuti kuchenesa kwaitwa nemazvo.