1. Zofunikira za SMT pamapangidwe agawo ndi izi:
Kugawidwa kwa zigawo pa bolodi la dera losindikizidwa liyenera kukhala lofanana momwe zingathere.Kutentha kwa kutentha kwa reflow soldering ya zigawo zazikuluzikulu ndizokulu, ndipo ndende yowonjezereka ndiyosavuta kuchititsa kutentha kwapafupi ndikupangitsa kuti pakhale soldering.Pa nthawi yomweyi, maonekedwe a yunifolomu amathandizanso kuti pakhale pakati pa mphamvu yokoka.Mu kugwedezeka ndi zoyesera zokhuza, sikophweka kuwononga zigawo, mabowo azitsulo ndi mapepala a solder.
2. Njira yoyendetsera zigawo zomwe zili pa bolodi losindikizidwa ziyenera kukhala zofanana momwe zingathere pazigawo zofanana, ndipo mawonekedwe a khalidwe ayenera kukhala ofanana kuti athandize kuyika, kuwotcherera ndi kuzindikira zigawozo.Ngati electrolytic capacitor positive mzati, diode positive pole, transistor single pini mapeto, pini yoyamba ya Integrated dera kakonzedwe kayendetsedwe kamene kamafanana mmene ndingathere.Mayendedwe osindikizira a manambala a zigawo zonse ndi ofanana.
3. Zigawo zazikulu ziyenera kusiyidwa kuzungulira SMD rework zida Kutentha mutu akhoza opareshoni kukula.
4. Kutentha zigawo ayenera kukhala kutali ndi zigawo zina monga n'kotheka, zambiri anaika pa ngodya, bokosi mpweya mpweya malo.Zigawo zowotchera ziyenera kuthandizidwa ndi njira zina kapena zothandizira zina (monga kuzama kwa kutentha) kuti pakhale mtunda wina pakati pa zigawo zotentha ndi malo osindikizira a bolodi, ndi mtunda wochepera 2mm.Zigawo zowotchera zimagwirizanitsa zigawo zotentha ndi matabwa ozungulira osindikizidwa mu matabwa a multilayer.Pamapangidwe, mapepala azitsulo amapangidwa, ndipo pokonza, solder amagwiritsidwa ntchito kuti agwirizane nawo, kotero kuti kutentha kumatuluka kudzera m'mabokosi osindikizira.
5. Zigawo zomwe zimakhudzidwa ndi kutentha ziyenera kusungidwa kutali ndi zigawo zomwe zimatulutsa kutentha.Monga ma audio, mabwalo ophatikizika, ma electrolytic capacitors ndi zida zina zapulasitiki, ziyenera kukhala kutali ndi stack ya mlatho, zida zamphamvu kwambiri, ma radiator ndi zopinga zamphamvu kwambiri.
6. Mapangidwe a zigawo ndi zigawo zomwe zimayenera kusinthidwa kapena kusinthidwa nthawi zambiri, monga potentiometers, ma coil osinthika, ma micro-switches a capacitor, machubu a inshuwaransi, makiyi, mapulagi ndi zigawo zina, ziyenera kuganizira zofunikira zamakina a makina onse. , ndi kuziika pamalo osavuta kusintha ndikusintha.Ngati makina kusintha, ayenera kuikidwa pa bolodi kusindikizidwa dera kuti atsogolere kusintha kwa malo;Ngati isinthidwa kunja kwa makina, malo ake ayenera kusinthidwa kuti agwirizane ndi kapu yosinthira pa gulu la chassis kuti ateteze mkangano pakati pa malo atatu-dimensional ndi awiri-dimensional danga.Mwachitsanzo, kutsegulidwa kwa gulu la batani losinthira batani kuyenera kufanana ndi malo osinthira pagulu losindikizidwa.
7. Bowo lokhazikika liyenera kukhazikitsidwa pafupi ndi pothera, pulagi ndi kukoka mbali, gawo lapakati la terminal lalitali ndi gawo lomwe nthawi zambiri limakakamizidwa, ndipo malo ofananirako ayenera kusiyidwa mozungulira dzenje lokhazikika kuti apewe kuwonongeka chifukwa cha kukulitsa kutentha.Monga kukulitsa kutentha kwautali kwanthawi yayitali kumakhala kowopsa kuposa bolodi losindikizidwa, mafunde akuwotchera amatha kukhala ndi zochitika zankhondo.
8. Pazigawo zina ndi magawo (monga ma transfoma, ma electrolytic capacitors, varistors, milu ya mlatho, ma radiator, etc.) ndi kulolerana kwakukulu ndi kutsika kosasunthika, nthawi yapakati pawo ndi zigawo zina iyenera kuwonjezeka ndi malire ena pamaziko a malo oyamba.
9. Ndibwino kuti kuonjezera malire a electrolytic capacitors, varistors, milu ya mlatho, capacitors poliyesitala ndi capacitors ena sayenera osachepera 1mm, ndi thiransifoma, ma radiators ndi resistors kuposa 5W (kuphatikizapo 5W) ayenera kukhala osachepera 3mm.
10. The electrolytic capacitor sayenera kukhudza zigawo Kutentha, monga high-power resistors, thermistors, transformers, radiators, etc. The interval pakati pa electrolytic capacitor ndi radiator ayenera kukhala osachepera 10mm, ndi nthawi pakati pa zigawo zina ndi zina. radiator ayenera kukhala osachepera 20 mm.
Nthawi yotumiza: Dec-09-2020