In modern electronics manufacturing dominated by surface mount technology (SMT), surface mount DIP switches are widely used in various high-density circuit designs due to their small size, high assembly efficiency, and stable signal. Txawm li cas los xij, kom ua tiav lawv qhov zoo thiab ua kom ntev - lub sijhawm ua haujlwm ruaj khov, nws yog ib qho tsim nyog yuav tsum paub cov txheej txheem sib xws hauv kev xaiv, kev teeb tsa, vuam, thiab kev ua haujlwm kom tsis txhob muaj teeb meem tshwm sim thiab txhim kho kev ua haujlwm tag nrho.
Cov txheej txheem tseem ceeb hauv theem kev xaiv yog sib piv cov kev xav tau tiag tiag nrog cov khoom tsis sib xws. Cov qauv yuav tsum raug xaiv raws li qhov xav tau ntawm cov khoom siv, hloov hom (xauv lossis tsis yog- xauv), ntsuas qhov hluav taws xob thiab tam sim no, thiab qhov kub thiab txias, av noo, thiab kev co ntawm qhov chaw ua haujlwm. Hauv qhov chaw- cov cuab yeej txwv tsis pub, tsawg- cov qauv profile yog nyiam kom tsis txhob cuam tshuam nrog cov khoom nyob ib puag ncig lossis vaj tse; rau cov ntawv thov uas xav tau cov khoom siv hluav taws xob poob siab, cov khoom lag luam poob siab thiab kev sib cuag ntev yuav tsum raug txiav txim siab. Tsis tas li ntawd, kev saib xyuas yuav tsum tau them rau qhov sib xws ntawm qhov sib txawv ntawm tus pin thiab PCB ncoo tsim kom tsis txhob tom qab mounting misalignment lossis tsis zoo soldering.
PCB layout thiab ncoo tsim yog cov txheej txheem tseem ceeb rau kev txhim kho kev sib dhos ua tau zoo. Qhov luaj li cas ntawm lub ncoo yuav tsum tau ua raws li qhov dav thiab qhov ntev ntawm cov khoom ua, tswj kom muaj qhov sib txawv kom tsis txhob muaj kev sib txuas ntawm cov hlua khi thiab cov pob qij txha txias. Nws raug nquahu kom ntxiv qhov qhib qhov tsim nyog rau hauv lub npog ntsej muag nyob ib puag ncig ntawm cov ntaub qhwv los tswj cov khoom siv tshuaj txhuam cov dej ntws. Thaum lub sij hawm layout, khaws cov keyboards kom deb li deb li sai tau los ntawm siab - fais fab cua sov- tsim cov khoom thiab siab - cov teeb liab zaus kom txo tau qhov cuam tshuam ntawm thermal cuam tshuam thiab electromagnetic nrov ntawm kev sib cuag. Ntau- hloov arrays tuaj yeem npaj nrog qhov sib npaug ntawm qhov ntev thiab qhov sib txawv, ua kom yooj yim rau ob qho tib si xaiv- thiab- qhov chaw tshuab programming thiab tom qab pom kev tshuaj xyuas thiab kev saib xyuas.
Tus yuam sij rau soldering yog nruj me ntsis ua raws li qhov kub thiab txias profiles thiab kev tswj cov txheej txheem. Xa mus rau qhov ntsuas qhov ntsuas kub hauv cov ntaub ntawv cov ntaub ntawv los teeb tsa qhov ntsuas kub ntawm reflow thiab tuav lub sijhawm kom tsis txhob muaj cua sov uas tuaj yeem ua rau casing deformation lossis sab hauv hlau oxidation. Solder paste luam ntawv yuav tsum zoo ib yam thiab ntawm cov tuab tuab, thiab xaiv - thiab - qhov chaw tshuab nozzle siab yuav tsum tau hloov mus rau qib uas tso cai rau khaws ruaj ntseg yam tsis muaj kev puas tsuaj rau cov hlau lead. Tom qab soldering, siv cov tshuaj ntsuam xyuas qhov muag (AOI) lossis lub tshuab tsom iav los tshuaj xyuas cov kev sib koom ua ke ntawm kev sib koom ua ke, tshem tawm cov teeb meem tam sim ntawd xws li cov pob qij txha txias, cov khoom siv tsis txaus, lossis cov khoom siv solder, thiab ua cov kev ntsuam xyuas ua haujlwm los txheeb xyuas lub xeev ntawm / tawm ntawm txhua qhov hloov.
Kev ua haujlwm thiab kev siv cov txheej txheem tseem ceeb sib npaug. Khaws qhov chaw hloov chaw kom huv si kom tsis txhob muaj roj, plua plav, lossis kua dej los ntawm kev nkag mus rau hauv qhov khoob thiab cuam tshuam rau kev sib cuag. Thaum nias los yog toggling, siv quab yuam nyob rau hauv ib txoj kab ncaj nraim raws tus tsim kev deb; tsis txhob siv lub zog ntawm lub kaum sab xis lossis tshaj qhov kev mus los kom tsis txhob muaj kev puas tsuaj rau cov qauv siv tshuab lossis deformation mus tas li. Rau cov khoom siv nyob rau hauv vibrating ib puag ncig, xav txog kev ntxiv cushioning ntsuas nyob ib ncig ntawm lub PCB los yog hloov mus kom ruaj khov txoj hauj lwm. Rau tus kheej- xauv cov keyboards uas yuav tsum tau tuav txoj haujlwm ruaj khov rau lub sijhawm ntev, tshuaj xyuas tsis tu ncua rau cov kev hloov pauv tsis xav txog hauv txoj haujlwm txhawm rau txheeb xyuas qhov ua yuam kev thaum ntxov.
Kev tu thiab hloov cov txheej txheem qhia txog kev nyab xeeb thiab raug. Ua ntej hloov cov khoom, txiav tawm lub hwj chim thiab siv lub tshuab cua kub rework kom sib npaug ntawm cov pob qij txha, kom tsis txhob muaj qhov kub thiab txias uas tuaj yeem ua rau PCB lossis cov khoom nyob ib sab. Tom qab disassembly, ntxuav lub solder pads thiab siv ib tug tsim nyog tus nqi ntawm flux los xyuas kom meej ib tug txhim khu kev qha kev twb kev txuas thaum soldering cov khoom tshiab. Tom qab reassembly, ua qhov kev kuaj xyuas ua haujlwm dua kom ntseeg tau tias cov teeb liab tso tawm sib phim tus tsim.
Feem ntau, daim ntawv thov cov txheej txheem rau saum npoo mount DIP keyboards npog tag nrho cov txheej txheem los ntawm kev xaiv thawj zaug thiab tsim qauv rau cov txheej txheem soldering thiab kev ua haujlwm thiab kev saib xyuas. Kev paub txog cov tswv yim no tuaj yeem tsis tsuas yog txo cov nqi tsim khoom tab sis kuj tseem txuas ntxiv lub neej ntawm cov cuab yeej, muab kev ruaj ntseg thiab muaj txiaj ntsig ntawm phau ntawv qhia kev txhawb nqa rau siab -cov khoom siv hluav taws xob ceev.
