Indlela yokunciphisa uxinzelelo lomphezulu kunye ne-viscosity kwi-soldering ye-PCBA?

I.Amanyathelo okutshintsha ukutsalwa komphezulu kunye ne-viscosity

I-Viscosity kunye noxinzelelo lwaphezulu zizinto ezibalulekileyo ze-solder.I-solder egqwesileyo kufuneka ibe ne-viscosity ephantsi kunye noxinzelelo lomphezulu xa inyibilika.Ukuxinezeleka kobuso bubume bezinto eziphathekayo, akunakususwa, kodwa kunokutshintshwa.

1.Amanyathelo aphambili okunciphisa ukutsalwa komphezulu kunye ne-viscosity kwi-PCBA soldering zilandelayo.

Yandisa ubushushu.Ukuphakamisa iqondo lobushushu kunokunyusa umgama wemolekyuli ngaphakathi kwi-solder etyhidiweyo kunye nokunciphisa amandla omxhuzulane weemolekyuli ngaphakathi kwe-solder yolwelo kwi-molecules yomhlaba.Ngoko ke, ukuphakamisa ubushushu kunokunciphisa i-viscosity kunye noxinzelelo lwangaphandle.

2. Uxinzelelo oluphezulu lwe-Sn luphezulu, kwaye ukongezwa kwe-Pb kunokunciphisa ukunyanzeliswa komhlaba.Yandisa umxholo welothe kwi-solder ye-Sn-Pb.Xa umxholo wePb ufikelela kwi-37%, ukunyanzeliswa komhlaba kuncipha.

3. Ukongeza i-arhente esebenzayo.Oku kunokunciphisa ngokufanelekileyo ukunyanzeliswa komphezulu we-solder, kodwa kunye nokususa umgangatho we-oxide we-solder.

Ukusetyenziswa kwe-nitrogen yokukhusela i-pcba ye-welding okanye i-vacuum welding inokunciphisa i-oxidation yobushushu obuphezulu kunye nokuphucula ukumanzisa.

II.indima yoxinzelelo lomphezulu kwi-welding

Uxinzelelo lomphezulu kunye namandla okumanzisa kwicala elichaseneyo, ngoko ke uxinzelelo lomphezulu yenye yezinto ezingancediyo ukumanzisa.

Nokubaphinda uqukunjelwei-oveni, i-wave solderingumatshiniokanye i-soldering manual, ukunyanzeliswa komphezulu wokwakhiwa kwamalungu amahle e-solder zizinto ezingathandekiyo.Nangona kunjalo, kwinkqubo yokubekwa kwe-SMT inkqubo yokubuyisela i-soldering soldering surface ingasetyenziswa kwakhona.

Xa i-solder i-paste ifikelela kwiqondo lokushisa elinyibilikayo, phantsi kwesenzo se-balanced surface tension, iya kuvelisa i-self-positioning effect ( Ulungelelaniso lwe-Self), oko kukuthi, xa indawo yokubeka icandelo inokuphambuka okuncinci, phantsi kwesenzo soxinzelelo lomhlaba, icandelo linokutsalwa ngokuzenzekelayo libuyele kwindawo ekujoliswe kuyo.

Ke ngoko ukuxinana komphezulu kwenza inkqubo yokuqukuqela kwakhona ukunyusela imfuneko echanekileyo ikhululeke, kulula ukuyiqonda i-automation ephezulu kunye nesantya esiphezulu.

Kwangaxeshanye kwakhona kungenxa yokuba "ukuhamba kwakhona" kunye ne "self-location effect" uphawu, i-SMT yokuphinda iqhube inkqubo yokuthengisa inkqubo yoyilo lwephedi, umgangatho wecandelo kunye nokunye kunesicelo esingqongqo.

Ukuba uxinzelelo kumphezulu alulungelelananga, nokuba indawo yokubeka ichanekile kakhulu, emva kokuwelda kuya kuvela kwakhona icandelo isikhundla offset, ukuma lesikhumbuzo, ibhulorho kunye nezinye iziphene welding.

Xa i-wave soldering, ngenxa yobukhulu kunye nokuphakama kwecandelo le-SMC / SMD lomzimba ngokwawo, okanye ngenxa yecandelo eliphezulu elithintela icandelo elifutshane kunye nokuthintela ukuhamba kwe-tin wave, kunye nefuthe lethunzi elibangelwa ukuxinana komphezulu we-tin wave. ukuhamba, i-solder yolwelo ayinakungenwa ngasemva kwecandelo lomzimba ukwenza indawo yokuthintela ukuhamba, okukhokelela ekuvuzeni kwe-solder.

Iimpawu zeNeoDen IN6 Reflow Soldering machine

I-NeoDen IN6 ibonelela nge-solder esebenzayo yokubuyisela kwakhona kubavelisi be-PCB.

Uyilo lwetafile-phezulu yemveliso yenza ukuba ibe sisisombululo esifanelekileyo kwimigca yokuvelisa kunye neemfuno eziguquguqukayo.Yenziwe nge-automation yangaphakathi enceda abaqhubi banikeze i-solder ephuculweyo.

Imodeli entsha igqithise imfuno yokufudumala kwe-tubular, ebonelela ngokusasazwa kweqondo lokushisayonke i-oven yokubuyisela.Ngokuthengisa iiPCBs nakwiconvection, onke amacandelo afudunyezwa ngesantya esifanayo.

Uyilo lusebenzisa ipleyiti yokufudumeza kwe-aluminium ialloy eyandisa amandla okusebenza kakuhle kwenkqubo.Inkqubo yokucoca umsi yangaphakathi iphucula ukusebenza kwemveliso kwaye inciphisa imveliso eyingozi, nayo.

Iifayile ezisebenzayo zigcinwa ngaphakathi kwe-oven, kwaye zombini iifomati zeCelsius kunye neFahrenheit ziyafumaneka kubasebenzisi.I-oven isebenzisa umthombo wamandla we-110/220V AC kwaye inobunzima obungama-57kg.

I-NeoDen IN6 yakhiwe ngegumbi lokufudumeza i-aluminium alloy.