Mu blog iyi, tikambirana njira zomwe zimagwiritsidwa ntchito pagulu la PCB lokhazikika komanso momwe zimasinthira kudalirika komanso magwiridwe antchito a zida zamagetsi izi.
Tekinoloje ya soldering imagwira ntchito yofunika kwambiri pakuphatikiza kokhazikika kwa PCB. Mapulani apaderawa amapangidwa kuti apereke kuphatikiza kokhazikika komanso kusinthasintha, kuwapanga kukhala abwino kwa ntchito zosiyanasiyana komwe malo ali ochepa kapena olumikizana ovuta amafunikira.
1. Ukadaulo wa Surface Mount (SMT) pakupanga kokhazikika kwa PCB:
Ukadaulo wa Surface Mount (SMT) ndi imodzi mwamaukadaulo omwe amagwiritsidwa ntchito kwambiri pagulu la PCB lokhazikika. Njirayi imaphatikizapo kuyika zida zokwera pamwamba pa bolodi ndikugwiritsa ntchito solder phala kuti zikhazikike. Phala la Solder lili ndi tinthu tating'onoting'ono tomwe timayimitsidwa mumayendedwe omwe amathandizira pakugulitsa.
SMT imathandizira kachulukidwe kagawo kakang'ono, kulola kuti zigawo zambiri ziziyikidwa mbali zonse za PCB. Ukadaulowu umaperekanso magwiridwe antchito otenthetsera komanso magetsi chifukwa cha njira zazifupi zomwe zimapangidwira pakati pa zigawo. Komabe, pamafunika kuwongolera molondola kwa njira yowotcherera kuti mupewe milatho ya solder kapena mafupa osakwanira a solder.
2. Kupyolera mu-bowo luso (THT) mu okhwima flex PCB facbrication:
Ngakhale zida zokwera pamwamba zimagwiritsidwa ntchito pa ma PCB okhazikika, zida zapabowo zimafunikanso nthawi zina. Kupyolera mu teknoloji ya hole (THT) imaphatikizapo kuyika chigawo chotsogolera mu dzenje pa PCB ndi kuwagulitsa mbali ina.
THT imapereka mphamvu zamakina ku PCB ndikuwonjezera kukana kwake kupsinjika kwamakina ndi kugwedezeka. Zimalola kukhazikitsa kotetezeka kwa zigawo zazikulu, zolemera zomwe sizingakhale zoyenera kwa SMT. Komabe, THT imabweretsa njira zotalikirapo ndipo ikhoza kuchepetsa kusinthasintha kwa PCB. Chifukwa chake, ndikofunikira kuti pakhale mgwirizano pakati pa zigawo za SMT ndi THT pamapangidwe okhwima a PCB.
3. Kutentha kwa mpweya wotentha (HAL) pakupanga kokhazikika kwa PCB:
Hot air leveling (HAL) ndi njira yowotchera yomwe imagwiritsidwa ntchito popaka nsonga ya solder kuti iwonekere mkuwa pama PCB olimba. Njirayi imaphatikizira kudutsa PCB mumtsuko wa solder wosungunuka ndikuwuyika ku mpweya wotentha, womwe umathandizira kuchotsa solder yochulukirapo ndikupanga malo osalala.
HAL imagwiritsidwa ntchito nthawi zambiri kuti iwonetsetse kusungunuka koyenera kwa mayendedwe amkuwa komanso kupereka zokutira zoteteza ku okosijeni. Zimapereka kuphimba bwino kwa solder ndikuwonjezera kudalirika kwa mgwirizano wa solder. Komabe, HAL ikhoza kukhala yosayenera pamapangidwe onse a PCB okhazikika, makamaka omwe ali ndi zozungulira zolondola kapena zovuta.
4. Kuwotcherera kosankhidwa mu PCB yolimba yosinthika:
Selective soldering ndi njira yomwe imagwiritsidwa ntchito pogulitsira zigawo zinazake ku ma PCB okhwima. Njirayi imaphatikizapo kugwiritsa ntchito chitsulo chowotchera kapena chitsulo chosungunula kuti mugwiritse ntchito solder kumadera ena kapena zigawo zina pa PCB.
Kusankhidwa kwa soldering kumakhala kothandiza makamaka pamene pali zigawo zowonongeka ndi kutentha, zolumikizira, kapena madera okwera kwambiri omwe sangathe kupirira kutentha kwa reflow soldering. Zimalola kuwongolera bwino njira yowotcherera komanso kumachepetsa chiopsezo chowononga zida zodziwika bwino. Komabe, kusankha soldering kumafuna kukhazikitsidwa kowonjezera ndi mapulogalamu poyerekeza ndi njira zina.
Mwachidule, matekinoloje owotcherera omwe amagwiritsidwa ntchito nthawi zambiri amaphatikiza ukadaulo wa pamwamba mount (SMT), ukadaulo wa through-hole (THT), kutentha kwa mpweya (HAL) ndi kuwotcherera kosankha.Ukadaulo uliwonse uli ndi zabwino zake ndi malingaliro ake, ndipo kusankha kumatengera zofunikira zenizeni za kapangidwe ka PCB. Pomvetsetsa matekinoloje awa ndi zotsatira zake, opanga amatha kutsimikizira kudalirika ndi magwiridwe antchito a ma PCB okhwima munjira zosiyanasiyana.
Nthawi yotumiza: Sep-20-2023
Kubwerera
