Chengyuan reflow soldering tembiricha zone inonyanya kukamurwa kuita ina tembiricha nzvimbo: preheating zone, inogara tembiricha zoni, soldering zone, uye kutonhora nzvimbo.
1. Preheating zone
Preheating ndiyo danho rekutanga reflow soldering process.Munguva iyi reflow phase, iyo yese yedunhu bhodhi gungano inoramba ichipisa yakananga kune inotarirwa tembiricha.Chinangwa chikuru che preheat phase ndechekuunza iyo yose bhodhi musangano zvakachengeteka kune pre-reflow tembiricha.Preheating zvakare mukana we degas the volatile solvents mune solder paste.Kuti iyo pasty solvent ibude zvakanaka uye gungano kuti risvike zvakachengeteka pre-reflow tembiricha, PCB inofanirwa kupiswa nenzira inowirirana, mutsara.Chiratidzo chakakosha chedanho rekutanga reflow process ndeye tembiricha kutsetseka kana tembiricha ramp nguva.Izvi zvinowanzoyerwa mumadhigirii celsius pasekondi C/s.Zvizhinji zvakasiyana-siyana zvinogona kukanganisa nhamba iyi, kusanganisira: chinangwa chekugadzirisa nguva, solder paste volatility, uye chikamu chekufungisisa.Izvo zvakakosha kuti titarise ese aya maitiro akasiyana, asi muzviitiko zvakawanda kutariswa kwezvikamu zvine hunyoro kwakakosha.“Zvinhu zvakawanda zvinotsemuka kana tembiricha ikachinja nekukurumidza.Mwero wepamusoro wekuchinja kwekupisa uko izvo zvinonyanya kusimba zvinokwanisa kumira unova iwo mutsetse unobvumidzwa. "Nekudaro, iyo mutsetse inogona kugadziridzwa kuti ivandudze kugadzirisa nguva kana thermally sensitive zvinhu zvikasashandiswa uye kuwedzera throughput.Naizvozvo, vagadziri vazhinji vanowedzera materu aya kusvika pachiyero chinobvumidzwa chepasi rose che 3.0°C/sec.Sezvineiwo, kana iwe uri kushandisa solder paste ine yakanyanya kunyungudutsa yakasimba, kupisa chikamu nekukurumidza kunogona kugadzira nzira yekutiza.Sezvinonyungudutsa zvinonyungudutsa zvichibuda, zvinogona kupfachura solder kubva pamapadhi nemabhodhi.Solder mabhora ndiro dambudziko guru rekubuda kwechisimba panguva yekudziya-up phase.Kana bhodhi raunzwa kusvika kune tembiricha panguva ye preheat chikamu, inofanirwa kupinda muchikamu chetembiricha chenguva dzose kana pre-reflow phase.
2. Constant tembiricha zone
Iyo inoyerera inogara tembiricha zone inowanzoonekwa ye60 kusvika 120 yechipiri yekubvisa solder paste volatiles uye activation ye flux, uko boka rekuyerera rinotanga redox pane chikamu chinotungamira uye mapedhi.Kunyanya tembiricha kunogona kukonzera kupfachuka kana kubhora kwe solder uye oxidation ye solder paste yakasungirirwa pads uye component terminals.Zvakare, kana tembiricha yakadzikira, iyo flux inogona kusashanda zvizere.
3. Welding nzvimbo
Kazhinji tembiricha yepamusoro i20-40°C pamusoro pemvura.[1] Uyu muganho unotarwa nechikamu chine yakaderera yakakwirira tembiricha kuramba (chikamu chinonyanya kukanganiswa nekupisa kupisa) pagungano.Iyo yakajairwa nhungamiro ndeyekubvisa 5°C kubva pakunyanya tembiricha iyo yakanyanya kutetepa chikamu chinogona kumira kusvika pakunyanya kupisa tembiricha.Zvakakosha kutarisa kupisa kwemaitiro kudzivirira kudarika muganhu uyu.Mukuwedzera, kutonhora kwakanyanya (kupfuura 260 ° C) kunogona kukuvadza mukati machipisi ezvikamu zveSMT uye kukurudzira kukura kwe intermetallic compounds.Ukuwo, tembiricha isina kupisa zvakakwana inogona kudzivirira slurry kubva pakuyerera zvakakwana.
4. Kutonhora nzvimbo
Iyo yekupedzisira zone inzvimbo yekutonhodza kuti zvishoma nezvishoma itonhodze bhodhi rakagadziriswa uye kuomesa majoini e solder.Kutonhodza kwakaringana kunodzvanya kusingadiwe intermetallic komputa kuumbwa kana kupisa kutyisa kune zvikamu.Tembiricha dzakajairika munzvimbo yekutonhodza dzinobva pa30-100°C.Kutonhodza kwe4°C/s kazhinji kunokurudzirwa.Iyi ndiyo parameter yekutarisisa paunenge uchiongorora mhedzisiro yemaitiro.
Kuti uwane rumwe ruzivo rwe reflow soldering tekinoroji, ndapota tarisa zvimwe zvinyorwa zve Chengyuan Industrial Automation Equipment
Nguva yekutumira: Jun-09-2023