[Zvinhu zvakawoma] SMT chigamba zvimedu zvemarata paste kupatsanura mukugadzirisa, yakawanda sei yaunoziva?(2023 Essence), iwe unofanirwa nazvo!
Mazhinji marudzi ekugadzira zvigadzirwa zvinoshandiswa muSMT chigamba kugadzirisa.Iyo tinnote ndiyo inonyanya kukosha.Hunhu hwema tin paste huchakanganisa zvakananga kunaka kwekushongedza kweSMT chigamba kugadzirisa.Sarudza marudzi akasiyana etinnuts.Rega ndizivise muchidimbu iyo yakajairwa tin paste classification:
Weld paste imhando ye pulp yekusanganisa weld powder ne paste -like welding agent (rosin, diluent, stabilizer, etc.) ine welded function.Panyaya yehuremu, 80 ~ 90% isimbi alloys.Panyaya yehuwandu, simbi uye solder yakaverengera 50%.
Mufananidzo 3 Gumi namatidza granules (SEM) (kuruboshwe)
Mufananidzo 4 Yakananga dhayagiramu yetin poda pamusoro pekuvhara (kurudyi)
Solder paste ndiyo inotakura tin powder zvidimbu.Inopa iyo yakanyatso kuyerera kuyerera uye humidity kusimudzira kupisa kutapurirana kune SMT nzvimbo uye kuderedza tension yemvura pane weld.Zvigadzirwa zvakasiyana zvinoratidza mabasa akasiyana:
① Solvent:
The solvent yeiyi ingredient weld ingredient ine yunifomu inogadziriswa ye otomatiki gadziriso mukuita basa reti paste, iyo ine simba rakakura pahupenyu hwe weld paste.
② Resin:
Inoita basa rakakosha mukuwedzera kunamira kwetini paste uye kugadzirisa uye kudzivirira PCB kubva pakudzokorora-oxidation mushure mekucheka.Ichi chinhu chakakosha chine basa rakakosha mukugadziriswa kwezvikamu.
③ Activant:
Inotamba basa rekubvisa izvo oxidized zvinhu zvePCB yemhangura firimu repamusoro uye chikamu SMT chigamba saiti, uye ine mhedzisiro yekudzikisa kushushikana kwepamusoro kwetin uye lead fluid.
④ Tentacle:
Kugadzirisa otomatiki kwe viscosity ye weld paste inoita basa rakakosha mukudhinda kudzivirira muswe uye kunamatira.
Kutanga, maererano nekuumbwa kweiyo solder paste classification
1, lead solder paste: ine zvinotungamira, zvakanyanya kukuvadza zvakatipoteredza uye nemuviri wemunhu, asi welding mhedzisiro yakanaka, uye mutengo wakaderera, unogona kuiswa kune zvimwe zvigadzirwa zvemagetsi pasina kuchengetedzwa kwezvakatipoteredza.
2, lead-isina solder paste: zvakatipoteredza zvine hushamwari zvinongedzo, zvishoma kukuvadza, zvinoshandiswa mune zvakatipoteredza zvine hushamwari zvigadzirwa zvemagetsi, nekuvandudzwa kwezvinodiwa zvemamiriro ekunze, tekinoroji isina-lead muindasitiri yekugadzira smt ichave maitiro.
Chechipiri, maererano nekunyunguduka kweiyo solder paste classification
Kazhinji kutaura, nzvimbo yekunyungudika ye solder paste inogona kukamurwa kuita tembiricha yepamusoro, tembiricha yepakati uye yakaderera tembiricha.
Iyo inowanzoshandiswa tembiricha yepamusoro ndeye Sn-Ag-Cu 305,0307;Sn-Bi-Ag yakawanikwa mune yepakati tembiricha.Sn-Bi inowanzoshandiswa pakupisa kwakadzika.Mu SMT chigamba kugadzirisa kunoda kusarudzwa zvinoenderana neakasiyana chigadzirwa maitiro.
Zvitatu, zvinoenderana nekunaka kwetin poda division
Zvinoenderana nechidimbu dhayamita yehupfu hwetin, iyo tin paste inogona kukamurwa kuita 1, 2, 3, 4, 5, 6 mamakisi eupfu, ayo 3, 4, 5 hupfu ndiyo inonyanya kushandiswa.Iyo yakanyanya kuomesesa chigadzirwa, kusarudzwa kwehupfu hwetini kunofanirwa kuve diki, asi iyo diki poda yetini, inoenderana oxidation nzvimbo yehupfu huchawedzera, uye yakatenderedza tin poda inobatsira kuvandudza kunaka kwekudhinda.
No. 3 powder: Mutengo wacho unodhura zvishoma, unowanzoshandiswa mumitambo yakakura ye smt;
Nhamba 4 powder: inowanzoshandiswa mumakumbo akaoma IC, smt chip processing;
No. 5 poda: Inowanzo shandiswa muzvinhu chaizvo zvewelding, nhare mbozha, mahwendefa nezvimwe zvinogadzirwa zvinoda;Iyo yakanyanya kuoma iyo smt chigamba kugadzirisa chigadzirwa, iyo inonyanya kukosha sarudzo ye solder paste, uye kusarudzwa kweakakodzera solder paste yechigadzirwa kunobatsira kuvandudza smt chigamba kugadzirisa maitiro.