l Inotungamira-isina yakakwirira tembiricha zvinodiwa zvemidziyo yemidziyo
Kugadzira-isina lead kunoda midziyo kuti ikwanise kumira tembiricha yakakwira kupfuura kugadzirwa kwe lead.Kana paine dambudziko nemidziyo yemidziyo, nhevedzano yezvinetso zvakaita sechoto chebindu warpage, track deformation, uye kusaisa chisimbiso kuita kwakashata kuchaitika, izvo zvinozopedzisira zvakanganisa kugadzirwa.Naizvozvo, track inoshandiswa muhovhoni isina-lead-free reflow inofanira kuomeswa uye mamwe marapirwo akakosha, uye majoini esimbi epepa anofanirwa kuongororwa X-ray kuratidza kuti hapana pakatsemuka uye mabubbles kudzivirira kukuvara uye kubuda mushure mekushandiswa kwenguva refu. .
l Kudzivirira zvinobudirira muchoto mhango warpage uye njanji deformation
Iyo mhango yemutobvu-isina reflow solder choto inofanira kugadzirwa nechidimbu chesheti simbi.Kana mhango yacho yakasanganiswa nezvidimbu zvidiki zvesimbi, inongoita warpage mukupisa kusina mutobvu.
Izvo zvinodikanwa kwazvo kuyedza kufanana kwenjanji pasi pekushisa kwepamusoro uye kuderera kwekushisa.Kana iyo track yakaremara pakupisa kwepamusoro nekuda kwezvinhu uye dhizaini, kuitika kwejamming uye kudonha kwebhodhi hakugone kudzivirirwa.
l Dzivisa kuvhiringidza majoini ekutengesa
Iyo yakapfuura inotungamira Sn63Pb37 solder ndeye eutectic alloy, uye nzvimbo yekunyungudika uye tembiricha yechando zvakafanana, zvese pa183 ° C.Iyo inotungamira-isina solder yekubatanidza yeSnAgCu haisi eutectic alloy.Kunyungudika kwayo kunotangira pa217°C kusvika pa221°C.Tembiricha yakadzikira pane 217°C kune yakasimba, uye tembiricha yakakwira kupfuura 221°C yemvura yemvura.Kana tembiricha iri pakati pe217°C kusvika 221°C Iyo alloy inoratidza mamiriro asina kugadzikana.Kana iyo solder joint iri mune ino mamiriro, iyo mechanical vibration yemidziyo inogona kushandura nyore solder joint shape uye kukonzera kukanganisa kwejoint solder.Ichi chikanganiso chisingagamuchirwi muIPC-A-610D chiyero chemamiriro anogamuchirwa ezvigadzirwa zvemagetsi.Naizvozvo, iyo yekufambisa sisitimu ye lead-isina reflow soldering dhizaini inofanirwa kuve yakanaka yekuzunguza-isina chimiro dhizaini kudzivirira kuvhiringa majoini anotengeswa.
Zvinodiwa pakudzikisa mari yekushandisa:
l Kusimba kwegomba rechoto
Iyo warpage yegomba rechoto uye kudonha kwemidziyo kuchakonzera zvakananga kuwedzera kwemutsara muhuwandu hwenitrogen inoshandiswa pamagetsi.Naizvozvo, kuiswa chisimbiso kwemidziyo kwakakosha kwazvo pakutonga kwemitengo yekugadzira.Kudzidzira kwakaratidza kuti kudonhedza kudiki, kunyangwe gomba rakavhurika saizi yescuru, rinogona kuwedzera kushandiswa kwenitrogen kubva pa15 cubic metres paawa kusvika ku40 cubic metres paawa.
l Thermal insulation performance yemidziyo
Bata pamusoro peiyo reflow oven (iyo chinzvimbo inoenderana nenzvimbo yekuyerera) haifanirwe kunzwa kupisa (yepamusoro tembiricha inofanira kunge iri pasi pe60 degrees).Kana iwe uchinzwa uchipisa, zvinoreva kuti kupisa kwekushisa kwekushisa kwevheni yekutsvaira kwakashata, uye simba guru remagetsi rinoshandurwa kuva kupisa uye rinorasika, zvichiita kuti simba risingakoshi riparadzwe.Kana muzhizha, simba rekupisa rakarasika mumusangano richaita kuti kutonhora kwemusangano kuwedzere, uye tinofanira kushandisa air-conditioning device kuti tibvise simba rekupisa kune kunze, izvo zvinotungamirira zvakananga kumarara maviri emagetsi.
l Kupedza mweya
Kana iyo midziyo isina yakanaka flux manejimendi system, uye kubuda kweiyo flux kunoitwa nemhepo yekupedza, ipapo michina yacho inoburitsawo kupisa uye nitrogen paunenge uchidhirowa iyo inoyerera yakasara, iyo inokonzeresa zvakananga kuwedzera kwesimba rekushandisa.
l Mari yekuchengetedza
Iyo reflow oven ine yakanyanyisa kugadzirwa kwekuita mukuwanda kuenderera kugadzirwa, uye inogona kuburitsa mazana emafoni edunhu mabhodhi paawa.Kana choto chacho chiine nguva pfupi yekugadzirisa, basa guru rekugadzirisa, uye nguva yakareba yekugadzirisa, inotora nguva yakawanda yekugadzira, zvichikonzera kukanganisa kwekugadzira.
Kuti uderedze mutengo wekugadzirisa, lead-isina reflow soldering michina inofanirwa kuve modular sezvinobvira kuti ipe nyore kugadzirisa nekugadzirisa michina (Mufananidzo 8).
Nguva yekutumira: Aug-13-2020