{"id":6264,"date":"2026-09-27T08:00:00","date_gmt":"2026-09-27T00:00:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=6264"},"modified":"2026-08-05T19:17:36","modified_gmt":"2026-08-05T11:17:36","slug":"press-fit-connectors-pcb","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/","title":{"rendered":"Press-Fit-stik: Tolerancer ved fremstilling af printkort til loddefrie forbindelser"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Indholdsfortegnelse<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Introduction_to_Press-Fit_Technology\" >Introduktion til Press-Fit-teknologi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#The_Mechanics_of_Press-Fit_Connectors\" >Funktionsprincippet bag press-fit-stik<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#The_Importance_of_PCB_Manufacturing_Tolerances\" >Betydningen af tolerancer i fremstillingen af printkort<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Finished_Hole_Size_FHS_Tolerances\" >Tolerancer for f\u00e6rdigboret hulst\u00f8rrelse (FHS)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Drilled_Hole_Size_DHS_and_Plating_Thickness\" >Borehulsst\u00f8rrelse (DHS) og bel\u00e6gningstykkelse<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Surface_Finishes_for_Press-Fit_Interconnects\" >Overfladebehandlinger til press-fit-forbindelser<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Immersion_Tin_ImSn\" >Tin-dypning (ImSn)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Electroless_Nickel_Immersion_Gold_ENIG\" >Kemisk nikkelbel\u00e6gning med gulddypning (ENIG)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Hot_Air_Solder_Leveling_HASL\" >Nivellering med varmluftslodning (HASL)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Organic_Solderability_Preservative_OSP\" >Organisk konserveringsmiddel til lodning (OSP)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Advantages_of_Solderless_Interconnects\" >Fordelene ved loddefrie forbindelser<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Thermal_Stress_Elimination\" >Fjernelse af termisk belastning<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Unmatched_Reliability\" >Uovertruffen p\u00e5lidelighed<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Assembly_Efficiency\" >Monteringseffektivitet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Double-Sided_Assembly_Compatibility\" >Kompatibilitet med dobbeltsidet montering<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Repairability\" >Reparerbarhed<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#How_to_Implement_Press-Fit_Technology_Step-by-Step_Guide\" >S\u00e5dan implementeres press-fit-teknologi (trin-for-trin-vejledning)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Best_Practices_for_Press-Fit_Assembly\" >Bedste praksis for pressemontering<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/press-fit-connectors-pcb\/#Frequently_Asked_Questions_FAQ\" >Ofte stillede sp\u00f8rgsm\u00e5l (FAQ)<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Introduction_to_Press-Fit_Technology\"><\/span>Introduktion til Press-Fit-teknologi<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Inden for det kr\u00e6vende omr\u00e5de, der er samling af printkort (PCBA), s\u00f8ger ingeni\u00f8rer konstant efter metoder til at forbedre p\u00e5lideligheden, reducere produktionsomkostningerne og \u00f8ge ydeevnen i elektroniske systemer. Press-fit-teknologien har vist sig at v\u00e6re en hj\u00f8rnesten i udviklingen af robuste, loddefrie forbindelser i applikationer med h\u00f8je p\u00e5lidelighedskrav, der sp\u00e6nder fra bilelektronik til telekommunikationsinfrastruktur. I mods\u00e6tning til traditionel gennemg\u00e5ende hulteknologi (THT) eller overflademonteringsteknologi (SMT), der er afh\u00e6ngige af loddemetaller til at etablere elektriske og mekaniske forbindelser, udnytter press-fit-stik mekanisk deformation til at opn\u00e5 en gast\u00e6t og h\u00f8jledende gr\u00e6nseflade.<\/p>\n<p>Det er afg\u00f8rende for enhver hardwareingeni\u00f8r eller printkortdesigner at forst\u00e5, hvordan press-fit-stik fungerer, og hvilke strenge tolerancer der kr\u00e6ves ved fremstillingen af printkort. Denne artikel gennemg\u00e5r principperne bag press-fit-teknologien, den afg\u00f8rende rolle, som tolerancerne for hullerne i printkortet spiller, overvejelser vedr\u00f8rende overfladebehandling samt fordelene ved at anvende loddefrie forbindelser i moderne elektroniske samlinger.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_Mechanics_of_Press-Fit_Connectors\"><\/span>Funktionsprincippet bag press-fit-stik<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>I sin kerne best\u00e5r et press-fit-stik af ben (eller terminaler), der er designet til at blive indsat i forgyldte gennemg\u00e5ende huller (PTH) p\u00e5 et printkort. Stiften har et fleksibelt afsnit \u2013 der ofte ligner et n\u00e5le\u00f8je, en \u00bbC\u00ab-form eller en lokal udbuling \u2013 som er lidt st\u00f8rre end diameteren p\u00e5 PTH'et.<\/p>\n<div style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Press-Fit-Connectors-1.jpg\" alt=\"Press-Fit-stik\" width=\"600\" height=\"383\" class=\"aligncenter size-full wp-image-6444\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Press-Fit-Connectors-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Press-Fit-Connectors-1-300x192.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Press-Fit-Connectors-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/div>\n<p>Under inds\u00e6ttelsesprocessen ud\u00f8ver specialv\u00e6rkt\u00f8j en kontrolleret kraft for at presse stikbenet ind i hullet. N\u00e5r benet tr\u00e6nger ind i det gennemg\u00e5ende hul, komprimeres det fleksible afsnit b\u00e5de elastisk og plastisk. Denne deformation ud\u00f8ver en kontinuerlig normal kraft mod v\u00e6ggene i det forgyldte gennemg\u00e5ende hul. Den deraf f\u00f8lgende friktion og tryk fjerner eventuelle oxider eller forurenende stoffer p\u00e5 kontaktfladerne, hvilket skaber en \u00bbkold svejsning\u00ab eller en gast\u00e6t forbindelse.<\/p>\n<p>Denne gast\u00e6tte t\u00e6tning er uigennemtr\u00e6ngelig for fugt, \u00e6tsende gasser og milj\u00f8forurenende stoffer, hvilket sikrer elektrisk stabilitet p\u00e5 lang sigt. Desuden eliminerer frav\u00e6ret af loddemateriale risikoen for termisk belastning under samling, kortslutning, kolde loddeforbindelser og intermetallisk spr\u00f8dhed, hvilket g\u00f8r press-fit-forbindelser s\u00e6rdeles modstandsdygtige i milj\u00f8er med kraftige vibrationer og h\u00f8je temperaturer.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_Importance_of_PCB_Manufacturing_Tolerances\"><\/span>Betydningen af tolerancer i fremstillingen af printkort<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>P\u00e5lideligheden af en press-fit-forbindelse afh\u00e6nger udelukkende af det pr\u00e6cise mekaniske samspil mellem den fleksible stift og det forgyldte gennemg\u00e5ende hul. Derfor er tolerancerne ved fremstillingen af printkort den mest afg\u00f8rende faktor for, om press-fit-teknologien fungerer. Hvis hullet er for stort, vil stiften ikke kunne ud\u00f8ve tilstr\u00e6kkelig normal kraft, hvilket f\u00f8rer til en l\u00f8s forbindelse, \u00f8get kontaktmodstand og i sidste ende svigt. Omvendt vil indstikskraften v\u00e6re for stor, hvis hullet er for lille, hvilket kan medf\u00f8re, at stiften bukker, at bel\u00e6gningen beskadiges, eller at printpladesubstraterne delaminerer.<\/p>\n<p>For at opn\u00e5 den optimale balance skal ingeni\u00f8rerne n\u00f8je overholde de tolerancer, som stikproducenten har angivet for den f\u00e6rdige hulst\u00f8rrelse (FHS) og den borede hulst\u00f8rrelse (DHS).<\/p>\n<div style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Press-Fit-Connectors-2.jpg\" alt=\"Press-Fit-stik\" width=\"600\" height=\"391\" class=\"aligncenter size-full wp-image-6445\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Press-Fit-Connectors-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Press-Fit-Connectors-2-300x196.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Press-Fit-Connectors-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/div>\n<h3><span class=\"ez-toc-section\" id=\"Finished_Hole_Size_FHS_Tolerances\"><\/span>Tolerancer for f\u00e6rdigboret hulst\u00f8rrelse (FHS)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Den f\u00e6rdige hulst\u00f8rrelse angiver den endelige diameter af PTH, n\u00e5r alle bel\u00e6gningsprocesser er afsluttet. Ved press-fit-anvendelser er FHS-tolerancen typisk meget sn\u00e6ver og angives ofte inden for \u00b10,05 mm (\u00b12 mil) eller endda \u00b10,025 mm (\u00b11 mil) for stik med h\u00f8j t\u00e6thed.<\/p>\n<p>For at opretholde dette pr\u00e6cisionsniveau kr\u00e6ves der en meget n\u00f8je kontrolleret fremstillingsproces af printkort. Producenterne skal tage h\u00f8jde for tykkelsen af kobberbel\u00e6gningen samt eventuelle overfladebehandlinger (s\u00e5som ENIG, neds\u00e6nkningsfortinning eller HASL), n\u00e5r de fastl\u00e6gger den indledende borest\u00f8rrelse.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Drilled_Hole_Size_DHS_and_Plating_Thickness\"><\/span>Borehulsst\u00f8rrelse (DHS) og bel\u00e6gningstykkelse<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>St\u00f8rrelsen p\u00e5 det borede hul er diameteren af det hul, der er boret i det ubehandlede FR-4-substrat (eller et andet dielektrisk materiale), inden der foretages nogen form for plettering. Forholdet mellem DHS, pletteringstykkelse og FHS er givet ved:<\/p>\n<p>FHS = DHS \u2013 (2 \u00d7 den samlede bel\u00e6gningstykkelse)<\/p>\n<p>For pressepassningshuller angives tykkelsen p\u00e5 kobberbel\u00e6gningen i hullets cylinderformede del typisk til mellem 25 \u00b5m og 50 \u00b5m (1 til 2 mil). Dette robuste kobberlag sikrer den n\u00f8dvendige strukturelle integritet til at modst\u00e5 indf\u00f8ringskr\u00e6fterne uden at rive eller revne.<\/p>\n<p>Producenterne skal n\u00f8je kontrollere boreprocessen for at minimere afvigelser, udtv\u00e6ring og overfladeruhed inde i hullet. H\u00f8jkvalitets h\u00e5rdmetalborekroner og optimerede fremf\u00f8rings- og hastighedsindstillinger er afg\u00f8rende for at fremstille glatte, perfekt cylindriske huller, der sikrer en ensartet fordeling af bel\u00e6gningen.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Surface_Finishes_for_Press-Fit_Interconnects\"><\/span>Overfladebehandlinger til press-fit-forbindelser<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Den overfladebehandling, der anvendes p\u00e5 PTH\u2019en, har en betydelig indflydelse p\u00e5 indstikskraften, kvaliteten af koldsvejsningen og pressfit-forbindelsens p\u00e5lidelighed p\u00e5 lang sigt. For at v\u00e6lge den rette overfladebehandling er det n\u00f8dvendigt at vurdere de specifikke krav til anvendelsen og stikmaterialet.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Immersion_Tin_ImSn\"><\/span>Tin-dypning (ImSn)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Tinbel\u00e6gning ved neds\u00e6nkning anses bredt for at v\u00e6re den optimale overfladebehandling til press-fit-anvendelser, is\u00e6r inden for bil- og telekommunikationsbranchen. Tin har fremragende sm\u00f8reegenskaber, hvilket reducerer den n\u00f8dvendige indstikskraft og minimerer slid p\u00e5 stiften. Desuden deformeres tin let under tryk, hvilket muligg\u00f8r dannelsen af et stort, meget ledende kontaktareal. Den karakteristiske tykkelse af ImSn er typisk 0,8 \u00b5m til 1,2 \u00b5m.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Electroless_Nickel_Immersion_Gold_ENIG\"><\/span>Kemisk nikkelbel\u00e6gning med gulddypning (ENIG)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>ENIG tilbyder enest\u00e5ende korrosionsbestandighed og en meget flad overflade, hvilket g\u00f8r det popul\u00e6rt til printkort, der kr\u00e6ver h\u00f8j p\u00e5lidelighed. Nikkel er imidlertid et h\u00e5rdt metal, hvilket \u00f8ger indstikskraften sammenlignet med tin. Ingeni\u00f8rer, der anvender ENIG, skal sikre sig, at deres press-fit-udstyr kan levere den n\u00f8dvendige kraft uden at beskadige printkortet eller stikket. Den typiske ENIG-overfladebehandling best\u00e5r af 3\u20136 \u00b5m nikkel og 0,05\u20130,12 \u00b5m guld.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Hot_Air_Solder_Leveling_HASL\"><\/span>Nivellering med varmluftslodning (HASL)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>HASL og blyfri HASL anbefales generelt ikke til press-fit-stik. HASL-processen skaber en uj\u00e6vn overflade inde i gennemg\u00e5ende huller (PTH), hvilket g\u00f8r det n\u00e6sten umuligt at overholde de kr\u00e6vede stramme FHS-tolerancer. Den uregelm\u00e6ssige overflade kan f\u00f8re til uensartede indstikskr\u00e6fter og up\u00e5lidelige forbindelser. <strong>F\u00e5 mere at vide om <a href=\"\/da\/blog\/return-path-optimization-si\/\">Optimering af returvejen: Udformning af stabile referenceplaner til signalintegritet ved h\u00f8je frekvenser<\/a>.<\/strong><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Organic_Solderability_Preservative_OSP\"><\/span>Organisk konserveringsmiddel til lodning (OSP)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>OSP udg\u00f8r et tyndt, organisk bel\u00e6gning, der beskytter kobberet mod oxidation. Selvom OSP kan anvendes til press-fit-applikationer, kr\u00e6ver det omhyggelig h\u00e5ndtering. Inds\u00e6tningsprocessen bryder let gennem OSP-laget, hvilket skaber direkte kontakt med det underliggende kobber. OSP har imidlertid ingen sm\u00f8reevne, hvilket betyder, at der kr\u00e6ves st\u00f8rre inds\u00e6tningskr\u00e6fter. <strong>F\u00e5 mere at vide om <a href=\"\/da\/blog\/controlled-depth-backdrilling-pcb\/\">Bagboring: Eliminering af signalrefleksion ved hj\u00e6lp af bagboring med pr\u00e6cis dybdekontrol<\/a>.<\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Advantages_of_Solderless_Interconnects\"><\/span>Fordelene ved loddefrie forbindelser<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Overgangen til press-fit-teknologi skyldes en r\u00e6kke v\u00e6sentlige tekniske og produktionsm\u00e6ssige fordele i forhold til traditionelle loddede forbindelser.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Thermal_Stress_Elimination\"><\/span>Fjernelse af termisk belastning<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Loddeprocesser, is\u00e6r b\u00f8lgelodning og selektiv lodning, uds\u00e6tter printkortet for ekstreme temperatursvingninger. Dette termiske chok kan for\u00e5rsage vridning, beskadige f\u00f8lsomme komponenter og kompromittere integriteten af flerlagsprintkort. Press-fit-montering er en rent mekanisk proces, der foreg\u00e5r ved stuetemperatur, hvilket fuldst\u00e6ndigt eliminerer termisk belastning p\u00e5 samlingen.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Unmatched_Reliability\"><\/span>Uovertruffen p\u00e5lidelighed<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Den gast\u00e6tte gr\u00e6nseflade i en press-fit-forbindelse er modstandsdygtig over for de typiske fejltyper, der er forbundet med loddeforbindelser, s\u00e5som koldlodning, hulrum, indesluttet flux og udmattelsesspr\u00e6ngninger for\u00e5rsaget af uoverensstemmelser i den termiske udvidelseskoefficient (CTE). Press-fit-stik udm\u00e6rker sig i milj\u00f8er, der uds\u00e6ttes for kraftige st\u00f8d, vibrationer og termiske cyklusser. <strong>F\u00e5 mere at vide om <a href=\"\/da\/blog\/skew-compensation-fwe-pcb\/\">Sk\u00e6vhedskompensation: H\u00e5ndtering af fiberv\u00e6vningseffekten (FWE) og l\u00e6ngdetilpasning til PCIe Gen 6<\/a>.<\/strong><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Assembly_Efficiency\"><\/span>Monteringseffektivitet<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Press-fit-teknologien str\u00f8mliner fremstillingsprocessen af printkort (PCBA). Den eliminerer behovet for p\u00e5f\u00f8ring af loddepasta, reflow-profilering, ops\u00e6tning af b\u00f8lgelodning samt reng\u00f8ring efter samling. Denne reduktion i antallet af processtrin medf\u00f8rer lavere produktionsomkostninger, \u00f8get gennemstr\u00f8mning og h\u00f8jere samlet udbytte. <strong>F\u00e5 mere at vide om <a href=\"\/da\/blog\/embedded-pcb-components-iot\/\">Indbyggede komponenter: Miniaturisering af IoT-enheder med indbyggede PCB-komponenter<\/a>.<\/strong><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Double-Sided_Assembly_Compatibility\"><\/span>Kompatibilitet med dobbeltsidet montering<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>I komplekse samlinger, hvor komponenterne er t\u00e6t pakket p\u00e5 begge sider af printkortet, kan det v\u00e6re meget problematisk at f\u00f8re et printkort gennem en b\u00f8lgeloddemaskine til THT-komponenter. Press-fit-stik kan is\u00e6ttes, efter at alle SMT-komponenter er blevet reflow-loddet p\u00e5 begge sider, hvilket i h\u00f8j grad forenkler samlingsforl\u00f8bet.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Repairability\"><\/span>Reparerbarhed<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Selvom press-fit-forbindelser er meget holdbare, g\u00f8r specialv\u00e6rkt\u00f8j det muligt at fjerne og udskifte beskadigede stifter eller stik p\u00e5 en sikker m\u00e5de uden brug af varme. Dermed undg\u00e5s termiske skader p\u00e5 det omgivende omr\u00e5de p\u00e5 printkortet, hvilket er en almindelig risiko ved aflodning af THT-komponenter.<\/p>\n<h2><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Press-Fit-Connectors.jpg\" alt=\"Press-Fit-stik\" width=\"600\" height=\"397\" class=\"aligncenter size-full wp-image-6443\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Press-Fit-Connectors.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Press-Fit-Connectors-300x199.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Press-Fit-Connectors-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/h2>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Implement_Press-Fit_Technology_Step-by-Step_Guide\"><\/span>S\u00e5dan implementeres press-fit-teknologi (trin-for-trin-vejledning)<span class=\"ez-toc-section-end\"><\/span><\/h2><div class=\"schema-how-to wp-block-yoast-how-to-block\"><p class=\"schema-how-to-description\">F\u00f8lg disse tekniske retningslinjer.<\/p> <ol class=\"schema-how-to-steps\"><li class=\"schema-how-to-step\" id=\"how-to-step-1\"><strong class=\"schema-how-to-step-name\">V\u00e6lg det rigtige stik<\/strong> <p class=\"schema-how-to-step-text\">Start med at finde et press-fit-stik, der opfylder de elektriske (str\u00f8m, sp\u00e6nding, signalintegritet) og milj\u00f8m\u00e6ssige krav til din anvendelse. Vurder stiftdesignet (f.eks. \u00bbn\u00e5l\u00f8je\u00ab) og de indstikningskraftparametre, som producenten har angivet.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-2\"><strong class=\"schema-how-to-step-name\">Fastl\u00e6g specifikationer for huller i printkort<\/strong> <p class=\"schema-how-to-step-text\">Se stikproducentens datablade for at fastl\u00e6gge den n\u00f8jagtige f\u00e6rdige hulst\u00f8rrelse (FHS) og den kr\u00e6vede tolerance. Tolerancen er typisk \u00b10,05 mm. Dette krav skal tydeligt angives p\u00e5 fremstillingstegningen.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-3\"><strong class=\"schema-how-to-step-name\">Angiv bel\u00e6gningstykkelse<\/strong> <p class=\"schema-how-to-step-text\">S\u00f8rg for, at fremstillingsanvisningerne angiver den n\u00f8dvendige tykkelse p\u00e5 kobberbel\u00e6gningen i hullets indre, som normalt ligger mellem 25 \u00b5m og 50 \u00b5m. Dette er afg\u00f8rende for at modst\u00e5 den mekaniske belastning, der opst\u00e5r ved is\u00e6tning.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-4\"><strong class=\"schema-how-to-step-name\">V\u00e6lg overfladebehandling<\/strong> <p class=\"schema-how-to-step-text\">V\u00e6lg en overfladebehandling, der er kompatibel med press-fit-teknologien. Tinbel\u00e6gning ved neds\u00e6nkning (ImSn) anbefales p\u00e5 det kraftigste p\u00e5 grund af dens sm\u00f8reevne, mens ENIG er velegnet til anvendelser, hvor der stilles h\u00f8je krav til p\u00e5lidelighed. HASL m\u00e5 under ingen omst\u00e6ndigheder anvendes til press-fit-hullerne.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-5\"><strong class=\"schema-how-to-step-name\">Udformning af printkortets footprint<\/strong> <p class=\"schema-how-to-step-text\">Opret PCB-fodaftrykket i henhold til producentens anbefalinger. S\u00f8rg for, at den ringformede kant har en passende st\u00f8rrelse for at forhindre, at den g\u00e5r i stykker under boringen, og for at give strukturel st\u00f8tte under inds\u00e6ttelsen af benene.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-6\"><strong class=\"schema-how-to-step-name\">Kommunik\u00e9r med producenten<\/strong> <p class=\"schema-how-to-step-text\">Del dine designkrav med PCB-producenten tidligt i forl\u00f8bet. Bekr\u00e6ft, at de er i stand til at overholde de strenge tolerancer for boring og overfladebehandling, der kr\u00e6ves i henhold til den specificerede FHS.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-7\"><strong class=\"schema-how-to-step-name\">Planl\u00e6g monteringsprocessen<\/strong> <p class=\"schema-how-to-step-text\">S\u00f8rg for at koordinere med kontraktproducenten (CM) eller samlefabrikken for at sikre, at de r\u00e5der over det rette udstyr til pressemontering. V\u00e6rkt\u00f8jet skal st\u00f8tte printkortet korrekt for at forhindre, at det b\u00f8jer, og ud\u00f8ve en kontrolleret, vinkelret kraft for at sikre, at stikket sidder helt p\u00e5 plads.<\/p> <\/li><\/ol><\/div><p>En vellykket integration af press-fit-stik i et printkortdesign kr\u00e6ver en systematisk tilgang, lige fra den indledende skematiske udformning til den endelige samling.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Best_Practices_for_Press-Fit_Assembly\"><\/span>Bedste praksis for pressemontering<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Den fysiske montering af press-fit-stik er en kr\u00e6vende proces, der kr\u00e6ver specialudstyr og omhyggelig ops\u00e6tning.<\/p>\n<p><strong>V\u00e6rkt\u00f8j og support:<\/strong> Printkortet skal underst\u00f8ttes j\u00e6vnt fra undersiden ved hj\u00e6lp af en specialfremstillet holder eller en ambolt. Dette forhindrer, at kortet vrider sig eller at der opst\u00e5r lokale brud som f\u00f8lge af sp\u00e6ndinger under is\u00e6tningen. Det \u00f8verste v\u00e6rkt\u00f8j, ogs\u00e5 kaldet \u00bbpresseblokken\u00ab, skal fordele kraften j\u00e6vnt over stikkets krop, s\u00e5 stifterne tr\u00e6der ind i hullerne helt vinkelret p\u00e5 kortets overflade.<\/p>\n<p><strong>Kraftoverv\u00e5gning:<\/strong> Moderne udstyr til pressemontering anvender kontinuerlig overv\u00e5gning af kraft og afstand. Systemet m\u00e5ler den p\u00e5f\u00f8rte kraft ved hvert trin i indf\u00f8ringsdybden. Disse data genererer en signaturkurve, der sammenlignes med foruddefinerede acceptable gr\u00e6nsev\u00e6rdier. Hvis indf\u00f8ringskraften er for lav (hvilket indikerer et for stort hul) eller for h\u00f8j (hvilket indikerer et for lille hul eller en forkert justeret stift), advarer maskinen operat\u00f8ren, hvilket forhindrer, at defekte samlinger g\u00e5r videre til n\u00e6ste trin.<\/p>\n<p><strong>Fastg\u00f8relse af stifter og placering:<\/strong> Stikkene skal trykkes ind, indtil de n\u00e5r den af producenten angivne indstikningsdybde. Hvis de trykkes for langt ind, kan det beskadige printkortets overflade og stikhuset, mens for lavt tryk kan forringe den elektriske forbindelse og komponentens mekaniske stabilitet.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions_FAQ\"><\/span>Ofte stillede sp\u00f8rgsm\u00e5l (FAQ)<span class=\"ez-toc-section-end\"><\/span><\/h2><div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1\"><strong class=\"schema-faq-question\">Kan press-fit-stik anvendes p\u00e5 fleksible trykte kredsl\u00f8b (FPC\u2019er)?<\/strong> <p class=\"schema-faq-answer\">Ja, men med v\u00e6sentlige forbehold. Fleksible kredsl\u00f8b mangler generelt den stivhed, der kr\u00e6ves for at modst\u00e5 indstikskr\u00e6fter. Anvendelse af press-fit-stik p\u00e5 FPC\u2019er kr\u00e6ver typisk, at der tilf\u00f8jes afstivningselementer (f.eks. tykke FR-4- eller polyimidlag) placeret omkring stikomr\u00e5det for at give mekanisk st\u00f8tte.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-2\"><strong class=\"schema-faq-question\">Er det muligt at ommontere et press-fit-stik, hvis det er monteret forkert?<\/strong> <p class=\"schema-faq-answer\">Ja. Der findes specialv\u00e6rkt\u00f8j til at tr\u00e6kke pressemonterede stifter eller hele stik ud af printkortet uden at beskadige de forgyldte gennemg\u00e5ende huller. N\u00e5r stikket er fjernet, kan der typisk inds\u00e6ttes et nyt stik i de samme huller, selvom stikproducenterne normalt anbefaler h\u00f8jst to eller tre inds\u00e6ttelsescyklusser for et givet hul for at sikre, at forgyldningen forbliver intakt.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-3\"><strong class=\"schema-faq-question\">Hvordan tester jeg p\u00e5lideligheden af en press-fit-forbindelse?<\/strong> <p class=\"schema-faq-answer\">P\u00e5lidelighedstest omfatter typisk milj\u00f8belastningstest (ESS). Dette omfatter termisk cykling, test i fugtig varme og test med tilf\u00e6ldige vibrationer. Efter milj\u00f8eksponeringen m\u00e5les kontaktmodstanden i press-fit-samlingen. En stigning i kontaktmodstanden ud over en specificeret t\u00e6rskel (f.eks. en \u00e6ndring p\u00e5 mere end 10 milliohm) indikerer en forringelse af den gast\u00e6tte t\u00e6tning.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-4\"><strong class=\"schema-faq-question\">Hvorfor kan jeg ikke bruge HASL-overfladebehandling til pressepassede huller?<\/strong> <p class=\"schema-faq-answer\">HASL-processen (Hot Air Solder Leveling) medf\u00f8rer en uj\u00e6vn fordeling af loddet i hulr\u00f8ret, hvilket ofte resulterer i en dr\u00e5beform eller varierende tykkelser. Denne uj\u00e6vne topografi g\u00f8r det umuligt at garantere de stramme diametertolerancer (ofte \u00b10,05 mm), der kr\u00e6ves for en ensartet og p\u00e5lidelig press-fit-montering.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-5\"><strong class=\"schema-faq-question\">Hvad er en \u00bbEye-of-the-Needle\u00ab (EON)-stift?<\/strong> <p class=\"schema-faq-answer\">\u00bbN\u00e5l\u00f8jet\u00ab er den mest udbredte type fleksibel stift, der anvendes i press-fit-stik. Stiftens midte er delt og buet udad, s\u00e5 den ligner et n\u00e5le\u00f8je. N\u00e5r stiften inds\u00e6ttes, presses de buede sektioner indad, hvilket skaber den kontinuerlige normalkraft, der kr\u00e6ves for at opn\u00e5 en gast\u00e6t forbindelse, samtidig med at mindre variationer i huldiameteren udlignes.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction to Press-Fit Technology In the demanding field of printed circuit board assembly (PCBA), engineers are continually seeking methods to improve reliability, reduce manufacturing costs, and enhance the performance of electronic systems. Press-fit technology has emerged as a cornerstone for creating robust, solderless interconnects in high-reliability applications ranging from automotive electronics to telecommunications infrastructure. Unlike [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6446,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"Press-Fit Connectors","_yoast_wpseo_title":"Press-Fit Connectors: PCB Manufacturing Tolerances for Solderless Interconnects","_yoast_wpseo_metadesc":"An in-depth guide to press-fit connectors, discussing PCB manufacturing tolerances for solderless interconnects and best practices in PCB assembly.","footnotes":""},"categories":[108],"tags":[592,278,591,593],"class_list":["post-6264","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-pcb-manufacturing-tolerances","tag-pcba","tag-press-fit-connectors","tag-solderless-interconnects"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Press-Fit Connectors: PCB Manufacturing Tolerances for Solderless 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