{"id":3307,"date":"2025-10-13T11:30:51","date_gmt":"2025-10-13T03:30:51","guid":{"rendered":"https:\/\/www.chuxin-smt.com\/how-reflow-oven-temperature-profiles-impact-pcb-solder-quality\/"},"modified":"2026-08-03T19:01:09","modified_gmt":"2026-08-03T11:01:09","slug":"how-reflow-oven-temperature-profiles-impact-pcb-solder-quality","status":"publish","type":"post","link":"https:\/\/www.chuxin-smt.com\/hr\/how-reflow-oven-temperature-profiles-impact-pcb-solder-quality\/","title":{"rendered":"Kako profili temperature pe\u0107nice za reflow utje\u010du na kvalitetu lemljenja tiskanih plo\u010dica"},"content":{"rendered":"<p><figure class=\"wp-block-image alignnone\"><img decoding=\"async\" src=\"https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2025\/10\/1760326245-5dcc9028a0024ae29e7001c6f5516fca-scaled.jpg\" alt=\"How Reflow Oven Temperature Profiles Impact PCB Solder Quality\" ><\/figure>\n<\/p>\n<p>Mo\u017eete u\u010diniti lemne spojeve na tiskanim plo\u010dicama \u010dvrstim i pouzdanim koriste\u0107i odgovaraju\u0107e profile temperature reflow pe\u0107nice. Dobra kontrola temperature poma\u017ee vam sprije\u010diti uobi\u010dajene probleme pri lemljenju. Ako profil pravilno postavite, imate manje rizika.<\/p>\n<ul>\n<li><a href=\"https:\/\/www.smtfactory.com\/why-your-reflow-oven-may-be-causing-soldering-defects\">Oko 30% problema pri lemljenju<\/a> in electronics happen because of wrong <a href=\"https:\/\/www.chuxin-smt.com\/hr\/slug-mastering-the-pcb-reflow-temperature-profile-2\/\">temperaturni profil<\/a>s or bad materials.<br \/>\nOvaj \u010dlanak nudi jednostavne savjete koji \u0107e vam pomo\u0107i da odr\u017eite \u010dvrste i pouzdane lemne spojeve.<\/li>\n<\/ul>\n<h2 id=\"keytakeaways\">Klju\u010dne poruke<\/h2>\n<ul>\n<li>Odaberi <a href=\"https:\/\/www.chuxin-smt.com\/he\/reflow-ovens\/\">ispravan profil temperature pe\u0107nice za reflow<\/a> za izradu \u010dvrstih lemnih spojeva.<\/li>\n<li>Pratite koliko brzo se pe\u0107nica zagrijava i hladi kako biste smanjili stres i sprije\u010dili probleme.<\/li>\n<li>\u010cesto provjeravajte pe\u0107nicu kako biste odr\u017eali pravu temperaturu i izbjegli pogre\u0161ke.<\/li>\n<li>Koristite temperaturni profil koji odgovara va\u0161oj tiskanoj plo\u010dici i pasti za lemljenje za najbolje rezultate.<\/li>\n<li>Pazite na svaku temperaturnu zonu u pe\u0107nici kako biste <a href=\"https:\/\/www.chuxin-smt.com\/hr\/how-to-reduce-voids-in-reflow-soldering-process-tips\/\">bolje lemiti i imati manje problema<\/a>.<\/li>\n<\/ul>\n<h2 id=\"impactonsolderquality\">Utjecaj na kvalitetu lemljenja<\/h2>\n<h3 id=\"whyprofilingmatters\">Za\u0161to je profiliranje va\u017eno<\/h3>\n<p>Postavljanje pravog profila temperature pe\u0107nice za reflow poma\u017ee vam posti\u0107i dobre lemne spojeve. Termi\u010dko profiliranje sprje\u010dava uobi\u010dajene probleme i pobolj\u0161ava rad elektronike. Morate pratiti koliko brzo temperatura raste, koliko dugo traje zagrijavanje i koliko brzo se plo\u010dica hladi. Ova pa\u017eljiva metoda ravnomjerno zagrijava tiskanu plo\u010dicu i smanjuje toplinski stres.<\/p>\n<ul>\n<li><a href=\"https:\/\/www.protoexpress.com\/blog\/thermal-profiling-pcb-assembly-unsung-hero\/\">Termoprofiling je potreban za \u010dvrste lemne spojeve.<\/a><\/li>\n<li>Kori\u0161tenje ispravnog profila zaustavljanja <a href=\"https:\/\/www.chuxin-smt.com\/id\/improve-wave-soldering-quality-5-effective-methods\/\">problemi sa lemljenjem<\/a>.<\/li>\n<li>Dobra kontrola temperature \u010dini elektroniku pouzdanijom.<\/li>\n<li>Kontrolom poja\u010davanja temperature, odle\u017eavanja i hla\u0111enja posti\u017ee se ravnomjerno zagrijavanje.<\/li>\n<li>Manji toplinski stres zna\u010di manje o\u0161te\u0107enih dijelova.<\/li>\n<\/ul>\n<p>Ako <a href=\"https:\/\/www.chuxin-smt.com\/ar\/slug-optimizing-reflow-conveyor-speed-for-solder-joint-quality\/\">Profil temperature pe\u0107nice za reflow<\/a> Ako je temperatura pregrijavanja previsoka ili preniska, mo\u017eete imati mnogo problema. U donjoj tablici navedeni su uobi\u010dajeni nedostaci pri lemljenju, njihovi uzroci i na\u010dini ispravljanja:<\/p>\n<p>| Soldering Defect            | Cause                                                                | Suggested Action                                                       |<br \/>\n| &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211; | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;- |<br \/>\n| Cracked SMD Capacitor       | Heating rate set too high; moisture expands inside component         | Store in humidity cabinet, pre-bake, reduce heating rate               |<br \/>\n| Thermal Component Damaged   | Incorrect temperature profile during reflow                          | Verify peak temperature and time above liquidus                        |<br \/>\n| Solder Balls around SMDs    | Heating rate too high; flux splatters                                | Reduce heating rate to no more than 2\u00baC\/second                         |<br \/>\n| Graping                     | Too much heat during preheat and soak; flux exhausted                | Reduce time\/temperature during preheat and soak                        |<br \/>\n| Head-in-Pillow (HIP)        | Excessive heat during preheat and soak; oxidized connections         | Reduce time\/temperature, use nitrogen or higher activity solder paste  |<br \/>\n| Low Reflow Temp             | Insufficient temperature during reflow                               | Increase temp and\/or time at reflow stage                              |<br \/>\n| Cracked Solder Joint        | Poor solderability, bad paste, incorrect cooling rate                | Check solderability, paste quality, and match profile to the datasheet |<br \/>\n| Insufficient Solder Wetting | Contamination, poor paste, bad profile                               | Verify PCB\/component condition, paste, and profile                     |<br \/>\n| No Intermetallic Formation  | Poor solderability, bad paste, wrong profile, incompatible materials | Check solderability, paste quality, match profile to datasheet         |<\/p>\n<blockquote>\n<p>Savjet: Uvijek postavite profil temperature reflow pe\u0107nice za svoju tiskanu plo\u010dicu i pastu za lemljenje. Ovaj korak poma\u017ee izbje\u0107i ve\u0107inu problema pri lemljenju.<\/p>\n<\/blockquote>\n<h3 id=\"reliabilityofsolderjoints\">Pouzdanost lemnih spojeva<\/h3>\n<p>\u017delite da lemni spojevi ostanu \u010dvrsti dugo vremena. Profil temperature pe\u0107nice za reflow utje\u010de na to koliko je svaki spoj \u010dvrst i pouzdan. Kori\u0161tenje pogre\u0161nog profila mo\u017ee uzrokovati probleme s termi\u010dkim ciklusima. Ti problemi \u010dine lemne spojeve slabima i skra\u0107uju im vijek trajanja. Termi\u010dki stres nastaje kada se materijali \u0161ire razli\u010ditim brzinama. To mo\u017ee uzrokovati pukotine i otkaze.<\/p>\n<ul>\n<li><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC11123225\/\">Lo\u0161e profiliranje temperature uzrokuje probleme termi\u010dkog cikliranja.<\/a><\/li>\n<li>Ako profili ne odgovaraju materijalima, termi\u010dki napon i deformacija rastu.<\/li>\n<li>Intermetalni spojevi i promjene u kalaju mogu oslabiti spojeve.<\/li>\n<li>Stope neuspjeha rastu kada ne kontrolirate temperaturni profil.<\/li>\n<\/ul>\n<blockquote>\n<p>\u201cThis study looks at how solder joints hold up over time. <a href=\"https:\/\/www.academia.edu\/100768797\/A_study_of_the_thermomechanical_reliability_of_solder_joints_in_surface_mount_electronics_technology\">Lo\u0161i profili reflow-a mogu uzrokovati o\u0161te\u0107enja i u\u010diniti lemne spojeve manje pouzdanima.<\/a>\u201c<\/p>\n<\/blockquote>\n<p>You need to set the profile for each PCB. The number of layers, copper thickness, and part layout change how heat moves. If you do not check your profile before making lots of boards, you risk <a href=\"https:\/\/www.chuxin-smt.com\/hr\/reflow-soldering-failures-troubleshooting-tips-pcb-quality\/\">cold solder joints<\/a>, especially under BGA parts. You can stop production losses by checking thermal conductivity, part types, and layout density.<\/p>\n<p>The table below shows what each temperature zone in the <a href=\"https:\/\/www.chuxin-smt.com\/hr\/reflow-oven-zones-explained-from-preheat-to-cooling\/\">reflow oven<\/a> does to help make strong solder joints:<\/p>\n<p>| Zone            | Function                                                                                         |<br \/>\n| &#8212;&#8212;&#8212;&#8212;&#8212; | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; |<br \/>\n| Preheating Zone | Slowly raises temperature to stop thermal shock; best rate is 1-3\u00b0C per second.                  |<br \/>\n| Soaking Zone    | Keeps the temperature steady to activate flux and make the temperature even across the board.    |<br \/>\n| Reflow Zone     | Gets to peak temperature (235\u00b0C-250\u00b0C) to melt solder paste and make strong bonds.               |<br \/>\n| Cooling Zone    | Quickly lowers temperature to harden solder joints; controlled cooling rate is 2-4\u00b0C per second. |<\/p>\n<blockquote>\n<p>Napomena: Pajkanje zavara mo\u017eete u\u010diniti pouzdanijim provjerom profila temperature pe\u0107nice za reflow prije masovne proizvodnje.<\/p>\n<\/blockquote>\n<h2 id=\"reflowoventemperaturezones\">Temperaturne zone reflow pe\u0107nice<\/h2>\n<p>Mo\u017eete pobolj\u0161ati lemljenje ako poznajete svaku zonu pe\u0107nice. Svaka zona obavlja va\u017ean zadatak. Ako pogre\u0161no postavite profil temperature taljne pe\u0107nice, mo\u017eete dobiti probleme poput oksidacije ili praznina. Ponekad spojevi ne zavr\u0161e ispravno. Morate uskladiti profil temperature s va\u0161om tiskanom plo\u010dom i pastom za lemljenje.<\/p>\n<h3 id=\"preheatzone\">Predgrijavanje zone<\/h3>\n<p>Zona predgrijavanja je prvi korak. Ova zona polako zagrijava va\u0161 tiskani plo\u010dasti sklop. Poma\u017ee sprije\u010diti toplinski \u0161ok i pokrenuti rad fluksa. Ako zagrijavate prebrzo, otapalo fluksa isparava prebrzo. To mo\u017ee uzrokovati da kalaj ne prianja dobro. Mo\u017eete vidjeti neujedna\u010dene kalajne spojeve.<\/p>\n<p>Ovdje je tablica koja prikazuje najbolju temperaturu i vrijeme predgrijavanja za olovno-slobodni lem:<\/p>\n<p>| Solder Type | Preheat Temperature Range                                                            | Preheat Duration  |<br \/>\n| &#8212;&#8212;&#8212;&#8211; | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; | &#8212;&#8212;&#8212;&#8212;&#8212;&#8211; |<br \/>\n| Lead-Free   | <a href=\"https:\/\/www.pcbonline.com\/blog\/pcb-lead-free-reflow-soldering.html\">150\u00b0C do 190\u00b0C<\/a> | 60 to 120 seconds |<br \/>\n| Leaded      | N\/A                                                                                  | N\/A               |<\/p>\n<ul>\n<li>Zagrijavajte po 1 \u00b0C do 3 \u00b0C u sekundi.<\/li>\n<li>Dr\u017eite vrijeme predgrijavanja izme\u0111u 60 i 120 sekundi.<\/li>\n<li>Neka fluks djeluje i ukloni vlagu.<\/li>\n<\/ul>\n<blockquote>\n<p>Savjet: Ako zagrijavate prebrzo, gubite magnetski protok i dobivate lo\u0161e lemne spojeve.<\/p>\n<\/blockquote>\n<h3 id=\"soakzone\">Zona natapanja<\/h3>\n<p>Slijedi zona namakanja. Ova zona odr\u017eava temperaturu konstantnom. Flux zavr\u0161ava djelovanje i \u010disti metal. Cijeli PCB dobiva istu temperaturu. Ako je presko\u010dite ili ne postavite ispravno, mo\u017eete dobiti kuglice kalaja ili prskanje.<\/p>\n<p>Ovdje je tablica koja prikazuje temperaturu taljenja bezolovnog kalaja:<\/p>\n<p>| Solder Type | Soak Temperature Range |<br \/>\n| &#8212;&#8212;&#8212;&#8211; | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;- |<br \/>\n| Lead-Free   | 150\u00b110\u00b0C               |<br \/>\n| Leaded      | N\/A                    |<\/p>\n<ul>\n<li>Dr\u017eite toplinu na <a href=\"https:\/\/wellmanxray.com\/blog\/what-are-the-temperature-zones-of-reflow-welding\/\">150\u00b0C do 180\u00b0C<\/a> od 60 do 120 sekundi.<\/li>\n<li>Uklonite vlagu i druge tvari iz paste za lemljenje.<\/li>\n<li>Zaustavite probleme poput kovanica i prskanja.<\/li>\n<\/ul>\n<blockquote>\n<p>Napomena: Ako ne postavite zonu natapanja ispravno, mo\u017eete dobiti praznine ili lo\u0161e vla\u017eenje. Morate promijeniti vrijeme natapanja i temperaturu kako bi fluks djelovao i o\u010distio metal.<\/p>\n<\/blockquote>\n<h3 id=\"reflowzone\">Zona refluksa<\/h3>\n<p>Zona taljenja je nakon namakanja. Ovdje se kalaj otopi i stvori \u010dvrste spojeve. Morate posti\u0107i pravu vr\u0161nu temperaturu i zadr\u017eati je kratko vrijeme. Ako je temperatura preniska, spojevi su hladni. Ako je previsoka ili traje predugo, spojevi postaju krhki i dijelovi se mogu slomiti.<\/p>\n<p>Ovdje je tablica koja prikazuje najbolju radnu temperaturu za kalaj s olovom i bezolovni kalaj:<\/p>\n<p>| Solder Type            | Melting Point (\u00b0C) | Recommended Peak Temperature (\u00b0C) | Consequences of Exceeding Temperature               |<br \/>\n| &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;- | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212; | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; |<br \/>\n| Lead-based (Sn63\/Pb37) | ~183              | 205\u2013220                           | Too many intermetallic, brittle joints, overheating |<br \/>\n| Lead-free (SAC305)     | ~217\u2013221          | 235\u2013250                           | Part damage, too much intermetallic, delamination   |<\/p>\n<ul>\n<li>Dr\u017eite toplinu iznad to\u010dke topljenja (<a href=\"https:\/\/www.fastturnpcbs.com\/guides\/reflow-soldering-profile\/\">217\u2013245 \u00b0C<\/a>) 30 do 90 sekundi.<\/li>\n<li>Napravite intermetalne slojeve i dovr\u0161ite lemni spoj.<\/li>\n<li>Nemojte predugo ostajati iznad to\u010dke topljenja, ina\u010de mo\u017eete o\u0161tetiti dijelove.<\/li>\n<\/ul>\n<blockquote>\n<p>Upozorenje: Premalo zagrijavanje zna\u010di lo\u0161e vla\u017eenje. Previ\u0161e ili predugo zagrijavanje \u010dini spojeve krhkim i mo\u017ee pregrijati dijelove.<\/p>\n<\/blockquote>\n<h3 id=\"coolingzone\">Zona hla\u0111enja<\/h3>\n<p>Zona hla\u0111enja je posljednja. Ova zona o\u010dvr\u0161\u0107uje lemne spojeve. Morate hladiti pravom brzinom kako biste sprije\u010dili pukotine i deformacije. Ako hladite prebrzo, dolazi do toplinskog \u0161oka. Ako hladite presporo, spojevi postaju krhki.<\/p>\n<p>Evo tablice koja prikazuje najbolju brzinu hla\u0111enja:<\/p>\n<p>| Cooling Rate                                                            | Effect on Solder Joints     |<br \/>\n| &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211; | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; |<br \/>\n| <a href=\"https:\/\/www.fastturnpcbs.com\/blog\/reflow-soldering-process\/\">2\u20134 \u00b0C\/s<\/a> | Best speed to stop problems |<br \/>\n| Too fast                                                                | Can cause thermal shock     |<br \/>\n| Too slow                                                                | Makes brittle joints        |<\/p>\n<ul>\n<li>Hladite brzinom od 2\u00b0C do 4\u00b0C u sekundi.<\/li>\n<li>Zaustavite toplinski \u0161ok i za\u0161titite dijelove.<\/li>\n<li>Pobrinite se da se lemni spojevi o\u010dvrsnu na pravi na\u010din.<\/li>\n<\/ul>\n<blockquote>\n<p>Savjet: Dobro hla\u0111enje nakon reflow-a je vrlo va\u017eno. Time sprje\u010davate pukotine, delaminaciju i dodatni posao odr\u017eavaju\u0107i sustav hla\u0111enja u dobrom stanju.<\/p>\n<\/blockquote>\n<p>Morate uskladiti svoj <a href=\"https:\/\/www.chuxin-smt.com\/hr\/set-reflow-oven-temperature-profile-for-better-soldering\/\">Profil temperature pe\u0107nice za reflow<\/a> na va\u0161 PCB i pastu za lemljenje. Razli\u010dite plo\u010de i paste zahtijevaju razli\u010dita pode\u0161avanja. Bolje lemljenje i manje problema posti\u017eete provjerom i pode\u0161avanjem svake zone.<\/p>\n<h2 id=\"commonsolderdefects\">Uobi\u010dajeni nedostaci lemljenja<\/h2>\n<h3 id=\"coldjoints\">Hladni spojevi<\/h3>\n<p>Hladni spojevi izgledaju be\u017eivotno i hrapavo. Lako pucaju pod optere\u0107enjem. Ako ne primijenite dovoljno topline, kalaj se ne otapa u potpunosti. To \u010dini spoj slabim. Sporo zagrijavanje u zonama predgrijavanja ili natapanja mo\u017ee uzrokovati hladne spojeve. \u010cak i mali pad temperature, poput 5 \u00b0C, mo\u017ee imati veliki utjecaj.<\/p>\n<ul>\n<li><a href=\"https:\/\/aaloktronix.com\/understanding-cold-joints-in-pcb-soldering-causes-effects-and-remedies\/\">Nedovoljna toplina uzrokuje hladne spojeve<\/a>.<\/li>\n<li>Niska temperatura ili kratko vrijeme zna\u010di da se kalaj ne tali.<\/li>\n<li>Visoka temperatura mo\u017ee o\u0161tetiti dijelove, stoga je kontrola va\u017ena.<\/li>\n<li>\u010cesto kalibrirajte svoju opremu kako biste odr\u017eali pravu temperaturu.<\/li>\n<\/ul>\n<blockquote>\n<p>Savjet: Provjerite profil temperature reflow pe\u0107nice prije nego \u0161to po\u010dnete. Dobra kontrola poma\u017ee pri protoku kalaja i stvara \u010dvrste spojeve.<\/p>\n<\/blockquote>\n<h3 id=\"solderballing\">Lemni \u010dvori\u0107i<\/h3>\n<p>Solder balling je pojava malih kuglica kalaja koje se formiraju u blizini komponenti. To se doga\u0111a ako zagrijavate prebrzo ili ako temperatura nije ravnomjerna. <a href=\"https:\/\/www.lcsc.com\/blog\/understanding-solder-balls-how-to-prevent-quality-issues-in-reflow-soldering\/\">Brzo zagrijavanje mo\u017ee zarobiti stvari u kaloju za lemljenje.<\/a>. Ako je vrijeme predgrijavanja prekratko ili je temperatura preniska, lem se mo\u017eda ne\u0107e dobro zalijepiti.<\/p>\n<p>| Temperature Profile Error | Description                                                                                                                                                              |<br \/>\n| &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;- | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; |<br \/>\n| Inadequate Reflow Profile | <a href=\"https:\/\/www.ltpcba.com\/reflow-soldering-temperature-zones-and-pcb-quality\/\">Nedovoljno vremena za predgrijavanje ili niske temperature<\/a> can stop solder from joining, causing balling. |<\/p>\n<ul>\n<li><a href=\"https:\/\/mpe.researchmfg.com\/reflow-profile\/\">Brzo zagrijavanje uzrokuje neravnomjerno zagrijavanje<\/a> i mo\u017ee saviti tiskani plo\u010dasti sklop.<\/li>\n<li>Rastvara\u010di se brzo isparavaju i stvaraju kvr\u017eice kalaja.<\/li>\n<li>Zatvorene \u010destice u pasti tako\u0111er uzrokuju stvaranje grudica.<\/li>\n<\/ul>\n<blockquote>\n<p>Napomena: <a href=\"https:\/\/www.chuxin-smt.com\/ro\/reflow-soldering-failures-troubleshooting-tips-pcb-quality\/\">Kontrolirajte brzinu zagrijavanja<\/a> Za sprje\u010davanje stvaranja kvr\u017eica kalaja. \u010cak i male promjene temperature mogu uzrokovati vi\u0161e nedostataka.<\/p>\n<\/blockquote>\n<h3 id=\"bridging\">Premo\u0161\u0107ivanje<\/h3>\n<p>Mostovi nastaju kada kalaj spoji padove koji ne bi smjeli dodirivati. Kalaj se \u0161iri i povezuje dva mjesta. To je uzrokovano neujedna\u010denim zagrijavanjem i visokom temperaturom na vrhu. Ako se jedan pad zagrije br\u017ee, kalaj se pomakne i formira mostove. Brze promjene ili neujedna\u010dena temperatura naru\u0161avaju povr\u0161insku napetost i uzrokuju prekomjerno \u0161irenje kalaja.<\/p>\n<p>| Issue Type            | Description                                                                |<br \/>\n| &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211; |<br \/>\n| Asymmetric Heating    | Solder paste on pads melts at different times, so the solder moves.        |<br \/>\n| High Peak Temperature | Heat above 245\u00b0C for lead-free solder makes it too runny, causing bridges. |<\/p>\n<ul>\n<li>Neravnomjerno zagrijavanje naru\u0161ava povr\u0161inski napon i \u0161iri lem.<\/li>\n<li>Visoka temperatura \u010dini kalaj previ\u0161e teku\u0107im.<\/li>\n<li>Upotrijebite dobar dizajn \u0161ablone i poku\u0161ajte s reflowom du\u0161ikom kako biste sprije\u010dili premo\u0161\u0107ivanje.<\/li>\n<\/ul>\n<h3 id=\"tombstoning\">Tombstoning<\/h3>\n<p>Tombstoning je pojava kada se jedan kraj male komponente podigne. To uzrokuje da komponenta stoji uspravno. Doga\u0111a se kada se plo\u010dice zagrijavaju razli\u010ditim brzinama. Ako se na jednoj plo\u010dici kalaj prvi otopi, ona podi\u017ee komponentu. Brzo zagrijavanje u zoni predgrijavanja pogor\u0161ava situaciju. Tombstoning mo\u017eete sprije\u010diti polaganim zagrijavanjem i duljim odr\u017eavanjem temperature blizu to\u010dke topljenja.<\/p>\n<ul>\n<li><a href=\"https:\/\/www.victorypcb.com\/news\/pcb-tombstone.html\">Razli\u010dita toplina podloga uzrokuje podizanje dijelova.<\/a>.<\/li>\n<li><a href=\"https:\/\/www.indium.com\/blog\/minimizing-tombstoning\/\">Neravne promjene topline mijenjaju sile vla\u017eenja.<\/a>.<\/li>\n<li>Pa\u017eljivo predgrijavanje poma\u017ee sprije\u010diti tombstoning.<\/li>\n<\/ul>\n<blockquote>\n<p>Upozorenje: Samo 5 \u00b0C razlike izme\u0111u podloga mo\u017ee uzrokovati tombstoning. Zadr\u017eite zagrijavanje ravnomjernim.<\/p>\n<\/blockquote>\n<h3 id=\"voiding\">Poni\u0161tavanje<\/h3>\n<p>Praznine zna\u010de da se unutar lemnih spojeva stvaraju prazna mjesta. Ta slaba mjesta \u010dine spojeve manje \u010dvrstim. Neravnomjerno zagrijavanje ili nedovoljno dugo natapanje zarobljuju plin u kalaju. Ako ne kontrolirate temperaturu, nastaje vi\u0161e praznina. Male promjene temperature mogu uzrokovati vi\u0161e nedostataka.<\/p>\n<ul>\n<li>Lo\u0161a zona natapanja zadr\u017eava plin.<\/li>\n<li>Neravnomjerno zagrijavanje stvara praznine.<\/li>\n<li>Promijenite vrijeme natapanja i temperaturu za bolje spojeve.<\/li>\n<\/ul>\n<blockquote>\n<p>Savjet: Pratite svoj temperaturni profil. \u010cak i male promjene mogu zna\u010dajno utjecati na kvalitetu lemljenja.<\/p>\n<\/blockquote>\n<h2 id=\"profileoptimization\">Optimizacija profila<\/h2>\n<h3 id=\"setupandcalibration\">Postavljanje i kalibracija<\/h3>\n<p>Mo\u017eete posti\u0107i dobre rezultate ako pravilno postavite pe\u0107 za reflow. Prvo, <a href=\"https:\/\/www.chuxin-smt.com\/hu\/set-reflow-oven-temperature-profile-for-better-soldering\/\">\u010cistiti pe\u0107nicu svaki tjedan<\/a> ili nakon velikih poslova. To uklanja fluktuacije i \u0161titi va\u0161e plo\u010de. Redovito provjeravajte dijelove za grijanje kako biste osigurali ravnomjerno zagrijavanje. Kalibrirajte senzore jednom mjese\u010dno za to\u010dna o\u010ditanja. Provjerite sustav transportnih traka kako va\u0161e plo\u010de ne bi bile o\u0161te\u0107ene. Dobar protok zraka je va\u017ean, stoga pazite na odzra\u010divanje i ventilacijske otvore.<\/p>\n<p>Evo jednostavne kontrolne liste za postavljanje i kalibraciju va\u0161e pe\u0107i:<\/p>\n<ol>\n<li>Polako podi\u017eite temperaturu u zoni rampe za 1\u20133 \u00b0C u sekundi.<\/li>\n<li>Odr\u017eavajte zonu natapanja stabilnom za ravnomjernu toplinu, pokrivaju\u0107i polovicu pe\u0107nice.<\/li>\n<li>Postignite najvi\u0161u temperaturu u zoni reflow-a i dr\u017eite plo\u010du iznad reflow-a 45\u201390 sekundi.<\/li>\n<li>Kontrolirajte zonu hla\u0111enja brzinom od otprilike 4 \u00b0C u sekundi.<\/li>\n<\/ol>\n<blockquote>\n<p>Savjet: Ako izra\u0111ujete mnogo plo\u010da, <a href=\"https:\/\/www.circuitnet.com\/experts\/86671.html\">Provjeravajte profil temperature va\u0161e pe\u0107nice za reflow svaki tjedan.<\/a>. Za sitne poslove provjeravajte ga jednom mjese\u010dno ili nakon velikih promjena.<\/p>\n<\/blockquote>\n<h3 id=\"pcbandpasteconsiderations\">Razmatranja o PCB-u i pasti<\/h3>\n<p>Morate prilagoditi postavke pe\u0107nice PCB-u i pastu za lemljenje. Razli\u010dite vrste leme zahtijevaju razli\u010dito zagrijavanje odozgo. <a href=\"https:\/\/www.allpcb.com\/allelectrohub\/a-guide-to-solder-reflow-ovens\">Kalaj bez olova najbolje radi na 235\u2013250 \u00b0C.<\/a>. Olovni kalaj zahtijeva 210\u2013230 \u00b0C. Fluks u pasti za kalaj po\u010dinje djelovati pri otprilike 100 \u00b0C. Poku\u0161ajte dosegnuti vrijeme iznad likvidusa (TAL) u roku od tri minute, osobito kod pasta koje se ne \u010diste. Ako prekora\u010dite to vrijeme, fluks mo\u017eda ne\u0107e dobro djelovati.<\/p>\n<p>| Solder Type | Peak Temperature Range (\u00b0C) |<br \/>\n| &#8212;&#8212;&#8212;&#8211; | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; |<br \/>\n| Lead-Free   | 235 \u2013 250                   |<br \/>\n| Leaded      | 210 \u2013 230                   |<\/p>\n<ul>\n<li>Zona natapanja obi\u010dno je na 150 \u00b0C.<\/li>\n<li>Zona taljenja treba dose\u0107i oko 245 \u00b0C za olovno-slobodni lem.<\/li>\n<li>Nemojte dopustiti da temperatura poraste prebrzo, primjerice na 95 \u00b0C, ina\u010de \u0107ete dobiti neujedna\u010deno zagrijavanje.<\/li>\n<\/ul>\n<h3 id=\"maintenancetips\">Savjeti za odr\u017eavanje<\/h3>\n<p>Redovito odr\u017eavanje osigurava ispravan rad va\u0161e pe\u0107i i sprje\u010dava probleme poput pucanja dijelova, izobli\u010denja i delaminacije. O\u010distite pe\u0107 i filter za fluks kako biste sprije\u010dili nakupljanje ostataka. Provjerite ventilatore i propelere kako bi zrak pravilno cirkulirao. Pregledajte grija\u010de i termoparove radi ispravnog o\u010ditavanja temperature. Prilagodite postupak za razli\u010dite materijale kako biste smanjili termi\u010dku \u0161tetu. Provjerite ispravan rad zona hla\u0111enja kako biste sprije\u010dili termi\u010dki \u0161ok i osigurali \u010dvrste lemne spojeve.<\/p>\n<p>| Maintenance Practice                | Why It Matters                                              |<br \/>\n| &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211; | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211; |<br \/>\n| Regular cleaning                    | Stops residue buildup and prevents cracking or delamination |<br \/>\n| Inspecting critical components      | Reduces the risk of warpage and failures                    |<br \/>\n| Cleaning the flux filtration system | Prevents contamination and fire hazards                     |<br \/>\n| Checking heaters and thermocouples  | Ensures accurate temperature readings                       |<br \/>\n| Maintaining cooling zones           | Prevents thermal shock and ensures strong solder joints     |<\/p>\n<blockquote>\n<p>Napomena: Dobro odr\u017eavanje i pravi <a href=\"https:\/\/www.chuxin-smt.com\/hr\/reflow-soldering-cooling-system-importance-optimization\/\">Profil temperature pe\u0107nice za reflow<\/a> poma\u017ee vam izbje\u0107i skupe nedostatke i odr\u017eati va\u0161e plo\u010de pouzdanima.<\/p>\n<\/blockquote>\n<p>Mo\u017eete oja\u010dati lemne spojeve kontrolom svake temperaturne zone u pe\u0107i za reflow. Morate provjeriti i postaviti profil za svoju tiskanu plo\u010dicu i pastu za lemljenje. Kalibrirajte pe\u0107 \u010desto kako biste odr\u017eali ravnomjernu temperaturu. Istra\u017eivanja pokazuju ove va\u017ene to\u010dke:<\/p>\n<p>| Key Takeaway                                                                                                   | Description                                                                                          |<br \/>\n| &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211; | &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;- |<br \/>\n| <a href=\"https:\/\/www.ltpcba.com\/how-reflow-soldering-temperature-zones-impact-pcb-quality\/\">Kontrola temperaturnih zona<\/a> | You must manage all four temperature zones for strong solder joints.                                 |<br \/>\n| Match Temperature Profiles                                                                                     | Make sure the temperature profile fits your PCB design to stop defects like tombstoning or bridging. |<br \/>\n| Regular Oven Calibration                                                                                       | Calibrating the oven often stops overheating and uneven heat that can hurt parts.                    |<br \/>\n| Gradual Heating and Cooling                                                                                    | Heating and cooling slowly lowers thermal stress and makes joints last longer.                       |<br \/>\n| Testing Methods                                                                                                | Use different tests to check if solder joints stay strong in many conditions.                        |<\/p>\n<p>Koristite ove savjete kako biste svaki put dobili dobre, besprijekorne lemne spojeve. Ako \u017eelite jo\u0161 bolje rezultate, isprobajte nove na\u010dine testiranja i pode\u0161avanja svojih profila.<\/p>\n<h2 id=\"faq\">\u010cesto postavljana pitanja<\/h2>\n<h3 id=\"whathappensifyouskipreflowovencalibration\">\u0160to se doga\u0111a ako presko\u010dite kalibraciju pe\u0107nice za reflow?<\/h3>\n<p>Rizikujete neujedna\u010deno zagrijavanje i lo\u0161e lemne spojeve. Kalibracija odr\u017eava pe\u0107 to\u010dnom. Preskakanje ovog koraka mo\u017ee uzrokovati nedostatke poput mostova ili hladnih spojeva. Uvijek provjerite pe\u0107 prije po\u010detka nove serije.<\/p>\n<h3 id=\"howdoyouknowifyourtemperatureprofileiscorrect\">Kako znate je li va\u0161 profil temperature ispravan?<\/h3>\n<p>Mo\u017eete koristiti termalni profiler za pra\u0107enje temperatura na svojoj tiskanoj plo\u010dici. Dobri profili pokazuju ravnomjerno zagrijavanje i ispravne vr\u0161ne temperature. Ako vidite nedostatke ili mutne spojeve, prilagodite svoje postavke.<\/p>\n<h3 id=\"canyouusethesameprofileforallsolderpastes\">Mo\u017eete li koristiti isti profil za sve paste za lemljenje?<\/h3>\n<p>Ne, ne biste trebali. Svaka pasta za lemljenje ima svoj to\u010dka topljenja i vlastite zahtjeve. Uvijek provjerite tehni\u010dki list proizvo\u0111a\u010da. Kori\u0161tenje pogre\u0161nog profila mo\u017ee uzrokovati lo\u0161e vla\u017eenje ili nepotpuni reflow.<\/p>\n<h3 id=\"whydosmalltemperaturechangescausedefects\">Za\u0161to male promjene temperature uzrokuju nedostatke?<\/h3>\n<p>\u010cak i razlika od 5 \u00b0C mo\u017ee promijeniti na\u010din na koji se kalaj tali i te\u010de. Male promjene mogu dovesti do \u0161upljina, tombstoninga ili slabih spojeva. Morate odr\u017eavati temperaturu stabilnom za najbolje rezultate.<\/p>","protected":false},"excerpt":{"rendered":"<p>Proper Reflow Oven Temperature profiles ensure strong PCB solder joints, reduce defects like cold joints and bridging, and improve overall assembly reliability.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"categories":[1,52],"tags":[],"class_list":["post-3307","post","type-post","status-publish","format-standard","hentry","category-company-news","category-product-information"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.chuxin-smt.com\/hr\/wp-json\/wp\/v2\/posts\/3307","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.chuxin-smt.com\/hr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.chuxin-smt.com\/hr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/hr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/hr\/wp-json\/wp\/v2\/comments?post=3307"}],"version-history":[{"count":0,"href":"https:\/\/www.chuxin-smt.com\/hr\/wp-json\/wp\/v2\/posts\/3307\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.chuxin-smt.com\/hr\/wp-json\/wp\/v2\/media?parent=3307"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/hr\/wp-json\/wp\/v2\/categories?post=3307"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/hr\/wp-json\/wp\/v2\/tags?post=3307"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}