Iwe unoshandisa reflow soldering process kubatanidza zvikamu kuPCB. Iyi nzira inopisa solder paste kusvikira yanyunguduka. Paste yakanyungudutswa inobata zvikamu panzvimbo. Makambani mazhinji anosarudza reflow soldering process yePCBs. Inoshanda zvakanaka nezvikamu zvidiki uye inopa mhedzisiro chaiyo. Yakanakirawo automation. Iyo reflow soldering process ine matanho akati wandei. Kutanga, iwe unoshandisa solder paste. Zvadaro, unoisa zvikamu. Zvadaro, iwe preheat bhodhi. Mushure maizvozvi, unoinyudza. Zvadaro, iwe unodzosera solder. Pakupedzisira, iwe unotonhorera bhodhi. Iwe unofanirwa kutarisa kukanganisa uye tekinoroji nyowani. Matambudziko akaita seguva kana mapedhi akasimudzwa anogona kuitika.
Heano humwe hurema hwakajairwa hwaungaona mune reflow soldering process:
Defect Type | tsananguro |
|---|---|
Component Shift | Mitumbi nemapadhi hazvisimuke nekuti zvikamu zvinofamba panguva yekudziya. |
Tombstoneing | Imwe mugumo wechip inosimudza apo imwe inoramba yakatengeswa. Izvi zvinoitika kubva pakupisa kusina kuenzana. |
Skipped Solder | Hapana solder pane pad kana lead. Izvi zvinogona kukonzera maseketi akavhurika. |
Yakasimudzwa Pad | Mhangura mapadhi anobva paPCB kubva pakupisa kwakanyanya kana kushushikana. |
Blowhole/Pinhole | Makomba madiki mumajoini anotengeswa kubva kune yakabatwa gasi. Maburi aya anoita kuti mubatanidzwa ushaye simba. |
Kusvibiswa/Chemical Residue | Makemikari akasara anogona kukuvadza simbi uye kukonzera matambudziko edunhu. |
Yakaputsika Solder Joint | Solder majoini anotsemuka kubva pakushanduka kwekupisa kana kudedera. |
Kupwanya Kwewaya | Waya dzinodambuka pamajoini ekutengesa kubva pakukotama kana kuvhunduka. |
Kurasikirwa Kupisa | Solder majoini haapise zvakakwana nekuti kupisa kunobva kwanyanya. Izvi zvinomisa soldering yakakodzera. |
Reflow Soldering Maitiro muPCB Gungano
Chii chinonzi Reflow Soldering process?
Iwe unoshandisa reflow soldering maitiro kubatanidza zvikamu kune pcb. Kutanga, iwe unoisa solder paste pamapadhi. Iyo paste inochengeta zvikamu munzvimbo isati yapisa. Zvadaro, unoisa zvikamu pabhodhi. Iwe ita shuwa kuti dzinoenderana nemapads. Zvadaro, iwe kupisa pcb ari reflow muovheni. Solder paste inonyunguduka uye inobatanidza mapedhi uye zvikamu. Mushure mekutonhora, unotarisa bhodhi kune matambudziko. Iyi nzira inokubatsira iwe kuita yakasimba uye yakanaka solder majoini.
Matanho Makuru muReflow Soldering Maitiro:
Isa solder paste pamusoro pcb Mapedhi ane stencil.
Isa zvikamu pabhodhi uye uzviise mutsetse.
Kupisa pcb ari reflow muovheni kunyungudutsa solder namira uye kubatana zvikamu.
Tarisa bhodhi kune matambudziko uye ona kuti yakanaka.
Sei Uchishandisa Reflow Soldering yePCBs?
Iwe tora reflow soldering muitiro nokuda pcbs nokuti inoshanda zvakanaka nediki uye dzakapfava zvikamu. Iyi nzira inokubvumira kudzora kupisa zviri nani, saka unodzivirira zvikamu. Reflow soldering yakanakira pamusoro pekusimudza tekinoroji (SMT), iyo inoshandiswa zvakanyanya mumusangano mutsva wePCB. Paunotarisa reflow soldering uye wave soldering, unoona mimwe misiyano mikuru:
Kuonekwa | Reflow Soldering | Wave Soldering |
|---|---|---|
Working Principle | Zvikamu ende pamusoro pcb uye solder paste ari kudziyisa ari reflow muovheni. | pcbs ine zvikamu zvinoenda kune wave soldering muchina uko solder mafungu anoshandiswa. |
Kushandisa Scenarios | Inoshandiswa zvakanyanya kumusangano weSMT. | Inoshandiswa zvakanyanya kumusangano weburi-hole (THT). |
Soldering Zvinoda | Inopa welding iri nani neinodzorwa kupisa. | Inoita kupisa kwakawanda, izvo zvinogona kukuvadza nhengo dzakasimba. |
Soldering Complexity | Inoda mimwe michina yakaoma uye zvinodzora. | Kuseta kuri nyore, ingo shandura welding marongero. |
Advantages | Yakanakira SMT, kushomeka kwekupisa, uye vashoma vashandi vanodiwa. | Inochengetedza nguva, inodhura zvishoma, uye inoita majoini akasimba ekutengesa. |
Kubatsira Kwakakosha
Paunoshandisa reflow soldering process, unowana zvinhu zvakawanda zvakanaka:
Iwe unowana majoini akatsvinda uye anototengesa nekuti kupisa uye kutonhora kunodzorwa.
Unogona kuita mijenya pcbs panguva imwe chete, saka unoshanda nokukurumidza uye nani.
Machina anoita basa, saka vanhu vanoita zvikanganiso zvishoma uye iwe unogadzirisa zvishoma.
Yakanaka reflow soldering inoita majoini akatsetseka akasimba kumagetsi uye kubata zvikamu.
Nekuchinja kupisa uye kushandisa nitrogen, unowana matambudziko mashoma uye mabhodhi ari nani.
Izvi zvinhu zvakanaka zvinoita reflow soldering muitiro yakanakisisa sarudzo itsva pcb gungano.
Matanho eReflow Soldering Process
Iyo reflow soldering process ine matanho akawanda. Nhanho imwe neimwe inobatsira kuita hukama hwakasimba pane pcb yako. Kana iwe ukatevera nhanho imwe neimwe, unogona kumisa matambudziko uye kuita kuti gungano rako rive nani.
Solder Paste Application
Kutanga, iwe unoisa solder paste pane pcb. Iyo paste ine tumarata tudiki uye flux. Inobata zvigadziriso zvekukwira pamusoro uye zvimwe zvikamu zvisati zvadziya. Iwe unoshandisa stencil kuisa paste chete pamapedhi aunoda. Mhando ye solder paste yaunotora inoshandura mafambiro ezvinhu uye kuti mhedzisiro yacho yakanaka sei. Heino tafura ine zvimwe solder paste zvigadzirwa uye zvavanoita:
chigadzirwa | tsananguro | chiwanikwa | Particle Size Distribution | Viscosity (mPA.s) | Kunyorera Tembiricha | Shelf Life |
|---|---|---|---|---|---|---|
LINQALLOY Sn42Bi57Ag1 | Yakaderera eutectic solder paste ye LED Assembly | Sn42Bi57Ag1 | Rudzi rwechitatu, 4 | - | 138 ° C | Mwedzi 6 pa5°C |
LINQALLOY SP-SAC105 | Pb-yemahara solder paste yakagadzirirwa Surface Mount Technology (SMT) | SAC105 | Rudzi rwechitatu, 4, 5 | 200 | 223 ° C | Mwedzi 6 pa5°C |
LINQALLOY SP-PSA525 | Yakakwira inotungamira solder paste yakagadzirirwa kuvhara-isina kugovera die attach process | Pb92.5Sn5Ag2.5 | Rudzi rwechitatu, 4, 5 | 130 - 170 | 287 ° C | Mwedzi 6 pa5°C |
LINQALLOY SP-SAC305 | Pb-yemahara solder paste yakagadzirirwa Surface Mount Technology (SMT) | SAC305 | Rudzi rwechitatu, 4 | 160 - 230 | 217 ° C | Mwedzi 6 pa5°C |
LINQALLOY SP-SAC307 | Pb-yemahara solder paste yakagadzirirwa Surface Mount Technology (SMT) | SAC307 | Rudzi rwechitatu, 4, 5 | 190 - 230 | 220 ° C | Mwedzi 6 pa5°C |
Iwe unogona zvakare kusarudza akasiyana flux marudzi kune yako solder paste:
Rosin based fluxes anoshandisa yakasikwa rosin uye inoda yakakosha yekuchenesa.
Mvura inonyungudika inoyerera inoshandisa organic zvinhu uye inogeza nemvura kana zvimwe zvinochenesa.
Hapana-yakachena flux inosiya chero chinhu shure uye yakanakira nzvimbo dzakachena.
Kutora iyo chaiyo solder paste uye flux inobatsira iwe kuwana majoini akanaka uye yakasimba solder.
Component Placement paPCB
Mushure mekuisa pane solder paste, iwe unowedzera zvikamu kune pcb. Unofanira kungwarira zvikuru pano. Kana iwe ukaisa chikamu munzvimbo isina kunaka, unogona kuwana majoini asina simba kana matambudziko. Mafekitari mazhinji anoshandisa michina kuita isa pamusoro-inokwira zvikamu nezvimwe zvimedu. Michina iyi ndeyechokwadi. Semuenzaniso, iyo yekuisa system inofanirwa kunge iri mukati me ± 0.001 ″. Iyo XY kushivirira kazhinji ± 0.2mm. Iwe zvakare unofanirwa kuve nechokwadi chekuti chikamu chimwe nechimwe chinotungamira chinovhara mapadhi. Iyo IPC-A-610 uye J-STD-001 mitemo inoti unoda kanokwana hafu kupindirana, uye dzimwe nguva kusvika pazvitatu pazvina pamabhodhi anofanirwa kugara kwenguva yakareba.
Kunyangwe kukanganisa kudiki, sekufambisa chikamu ne 0.1 mm, kunogona kukonzera kushata kwakashata kana maseketi mapfupi. Unofanira kutarisa ose chikamu nhungamiro uye chinzvimbo kuchengeta pcb wako kushanda zvakanaka.
Preheating uye Soaking
Zvadaro, iwe unoisa pcb muvheni reflow yekupisa uye kunyura. Iwe unodziya zvishoma nezvishoma bhodhi uye zvikamu kuti ugadzirire kugadzirira soldering. Iyi nhanho inomisa kuvhunduka kwemafuta uye inoita kuti flux ishande. Kupisa kwaunoshandisa kunobva pane yako solder paste. Heino tafura ine mitsara yakajairika:
Solder Rudzi | Preheating Temperature Range | Soaking Temperature Range |
|---|---|---|
Yakatungamira | 25 ° C kusvika 150 ° C | 150 ° C kusvika 200 ° C |
Kutungamira-Mahara | Kusvikira ku180 ° C | 180 ° C kusvika 220 ° C |
Kazhinji unoisa preheat iri pakati pe120°C ne160°C. Nzvimbo yekunyorova inotangira kubva ku160 ° C kusvika 180 ° C. Pakunyunguditsa pasina lead, unogona kushandisa preheat kubva pa150°C kusvika 190°C uye uchinyura kunosvika 217°C. Kana iwe ukadzora kupisa zvakanaka, solder paste inonyunguduka zvakaenzana uye unodzivirira matambudziko.
Reflow Stage
The reflow stage ndiyo inonyanya kukosha. Iwe kupisa pcb kusvikira solder paste inonyungudika uye inoita majoini akasimba pakati pemapedhi nezvikamu. Iyo tembiricha profiles yakakosha pano. Iwe unofanirwa kusvika kune iyo tembiricha yepamusoro uye woibata panguva yakakodzera. Kupisa kwakanyanya kunogona kukuvadza zvikamu kana kukonzera kutsemuka. Kusakwana kupisa kunoreva kuti solder haina kunyungudika nzira yese, uye unowana majoini asina simba.
Iyo tembiricha yepamusoro uye kuti iwe wakaibata kwenguva yakareba sei inoshandura kuti majoini ako ekutengesa ari akanaka sei.
Kubata nguva yakareba kunogona kuputsa zvinhu uye kuita kuti kukundikana kuve nyore.
Iwe unofanirwa kutarisa kupisa zvakanyanya kuti uwane majoini akasimba uye akachengeteka.
kutonhora
Mushure reflow, unofanira kutonhora pcb. Kutonhodza kunoita kuti majoini e solder ave akaoma uye akasimba. Iwe unofanirwa kudzora kuti unotonhora sei kumisa kuvhunduka uye kuchengetedza zvikamu zvakachengeteka. Kutonhodza kwakanakisa kuri 3–6 °C pasekondi. Kana iwe ukatonhora zvakanyanya kunonoka, unowana zviyo zvakakura mune solder, izvo zvinoita kuti majoini aite zinyekenyeke. Kana ukatonhora nekukurumidza, unogona kukotama zvikamu kana kutsemura majoini.
Zano: Kuchengeta yakatsiga kutonhora kumhanya kunobatsira iwe kuwana yakasimba solder majoini uye yakanaka pcbs. Gara uchitarisa danho rekutonhora kumisa matambudziko.
Yese nhanho mune reflow soldering kwakakosha pakuita yako pcb gungano kushanda zvakanaka. Kana iwe ukateerera kune solder paste, chikamu chekuisa, kutonga kwekupisa, uye kutonhora, unogona kugadzira majoini akasimba uye kumisa matambudziko akajairika.
Zvakanakira PCBs
Precision uye otomatiki
Reflow soldering inokubatsira isa zvikamu nemazvo. Michina inoisa solder paste chete painodiwa. Izvi zvakanakira mapuranga ane zvidimbu zvidiki zvakawanda. Ovheni inoita kuti kupisa kurambe kwakadzikama, kuitira kuti zvikamu zvisanyanya kupisa kana kutonhora. Izvi zvinobatsira kumisa zvikanganiso uye kuita hukama hwakasimba. Iwe unogona kuwedzera zvikamu zviduku zvine mitsetse yakaonda pasina kugadzira mabhiriji ekutengesa. Automation inoshandisa pick-ne-nzvimbo michina kuseta zvikamu pabhodhi. Michina iyi inoshanda nekukurumidza uye haiite zvikanganiso zvakawanda. Michina yekuongorora yakakosha inotarisa matambudziko. Izvi zvinokubatsira kuziva kuti bhodhi rako rakagadzirwa zvakanaka.
Solder paste inoenda chaizvo painofanira kuita zvikamu zvidiki
Kupisa kwakadzikama kunomisa kushushikana uye kunoderedza zvikanganiso
Pick-and-place michina inoisa zvikamu panzvimbo chaiyo
Michina yekuongorora inowana matambudziko nekukurumidza
Kubudirira
Reflow soldering inoita kuti iwe ugadzire akawanda mabhodhi nekukurumidza. Kana uchida zviuru zvemapuranga, michina inokubatsira kushanda nekukurumidza. Iwe unogona kushandisa maitiro aya kune mabheti makuru kana mashoma mabhodhi. Paunogadzira mamwe mapuranga, rimwe nerimwe rinodhura zvishoma. Heino tafura inoratidza kuti reflow inokubatsira sei kugadzira mamwe mabhodhi:
Kubudirira | Yakanakira 10,000+ mabhodhi | Inoshanda kumabhechi madiki kana pasi pe1,000 mabhodhi |
|---|---|---|
Kukurumidza Kukurumidza | Kukurumidza nemichina | Zvishoma, zvinowanzoitwa nemaoko |
Mutengo pane Unit | Kudzika kana waita zvakawanda | Higher kana ukaita shoma chete |
Kubvuma sanduko
Reflow soldering inoshanda kune akawanda marudzi emabhodhi dhizaini. Yakanakira Surface Mount Technology. Izvi zvinokutendera kuti uise zvikamu pabhodhi. Iwe unogona kushandisa akasiyana marudzi emapakeji mune imwechete kumhanya. Izvi zvinoita kuti kuyerera kuve kwakanaka kune zvitsva zvemagetsi zvinoda basa rakangwarira. Iwe unogona kuvaka mapuranga ane zvikamu kumativi ose uye kusanganisa marudzi akawanda ezvikamu mune imwe nzira.
Zano: Reflow soldering inoita kuti ugadzire mabhodhi ane zvikamu zvakawanda uye nzvimbo dzakasimba.
kuvimbika
Reflow soldering inoita majoini akasimba uye akachengeteka. Ovheni inochengeta kupisa kwakaringana kuti iite kubatanidza kwakanaka. Iwe unogona kuyedza bhodhi rako uchishandisa thermal shock tests. Izvi zvinotarisa kana majoini anoramba akasimba kana tembiricha ichichinja. Nhete yakatsetseka pajoini inoita kuti ive yakasimba. Kana jira racho rakanyanyisa, chibatanidza chinogona kuparara. Reflow soldering inobatsira kuchengeta iyo layer yakatetepa, saka bhodhi rako rinogara kwenguva refu.
Thermal shock tests tarisa kana majoini akasimba
Nhete dzakatetepa pamajoini dzinoita kuti zvive nani
Kudziya kwakadzikama uye kutonhora kunoita kubatanidza kwakaoma
Kudzivirira Kukanganisa muReflow Soldering
Iwe unoda kuti pcb yako igare kwenguva refu. Iwe unofanirwa kumisa kukanganisa panguva ye reflow soldering. Ichi chikamu chinotsanangura maitiro ekudzora kupisa, tora solder paste, tarisa mabhodhi ako, shandisa nitrogen, uye kugadzirisa matambudziko. Nhanho imwe neimwe inokubatsira kuti uite hukama hwakasimba uye mabhodhi ari nani.
Tembiricha Profile
Iwe unofanirwa kutarisa tembiricha padanho rega rega. Yakanaka tembiricha kudzora anomisa kuremara uye anochengeta pcb wako akachengeteka. Iwe unoshandisa zvishandiso zvakakosha kutarisa kupisa pabhodhi. Heano mamwe mazano:
Zvishoma nezvishoma simudza kupisa panguva yekupisa. Chengeta muyero werampu uri pakati pe0.5°C ne2.0°C pasekondi. Izvi zvinomisa kuvhunduka kwemafuta uye kutanga kuyerera kushanda.
Bata soak stage pa 150°C kusvika 180°C kwemasekonzi 60-120. Izvi zvinochengeta kupisa kunyange paPCB.
Isai reflow stage peak 20-30°C pamusoro pepanonyungudika solder. Chengetedza Nguva Pamusoro Liquidus (TAL) pakati pe30-90 masekondi.
Kutonhorera bhodhi pa2-4 ° C pasekondi. Izvi zvinobatsira kugadzira majoini akasimba.
Shandisa maturusi akanaka ekupisa kuti uwane data chaiyo yekupisa.
Tarisa bhodhi rinopfuura rimwe kuti uone kana ovheni dzakasiyana.
Tarisa uye shandura maprofile nguva zhinji kuti mibairo irambe yakatsiga.
Gara uchiverenga solder paste datasheet yezvakakosha zvekupisa zvinodiwa.
Zano: Kungwarira tembiricha kudzora kunokubatsira kumisa kuremara uye anochengeta pcb wako kushanda zvakanaka.
Solder Paste uye Flux
Iwe unofanirwa kutora yakanakisa solder paste uye flux kune yako pcb. Mhando ye solder paste inoshandura kuti soldering inoshanda sei uye kuti unowana hurema hungani. Tarisa pane alloy, hupfu mhando, uye microstructure. Spherical powder ine low oxide inoita majoini ari nani. Matanidza solder paste kubhodhi rako uye pad size. Type 3 kusvika Type 6 hupfu hunoshanda kune akasiyana pad saizi uye kubatsira kumisa bhiriji.
Zvinhu zvakawanda mu solder paste kudhinda zvinogona kuchinja kuremara mitengo. Heino tafura inoratidza zvinonyanya kukosha:
Level | Factor Description |
|---|---|
1 | Stencil yekuvhura chimiro kubva pamagadzirirwo ayo |
2 | Solder paste inoenderana |
3 | Kumirira nguva mhedzisiro |
4 | Squeegee zvinhu sarudzo |
5 | Zvirongwa zvemuchina wokudhinda |
6 | Reflow soldering marongero |
Iwe unofanirwawo kusarudza iyo chaiyo flux. Rosin-based flux inoda kucheneswa kwakakosha. Mvura-soluble flux inosuka nemvura. No-clean flux inosiya chero chinhu kumashure. Iyo chaiyo solder paste uye flux inobatsira iwe kuwana majoini akasimba uye mashoma hurema.
Maitiro Ekuongorora
Unofanira kutarisa pcb wako pashure soldering kuwana matambudziko mangwanani. Iwe unoshandisa nzira dzakasiyana kutsvaga kukanganisa. Heino tafura inoratidza nzira dzinonyanyozivikanwa:
Inspection Method | tsananguro |
|---|---|
Kuonekwa Kwekuona | Vanhu vanotsvaga kuremara neziso. |
Automated Optical Inspection (AOI) | Makamera uye software inowana isipo solder uye yakaipa zvikamu. |
X-ray Kuongorora | Inowana matambudziko akavanzika senge voids uye solder mabhiriji mukati pcb. |
Basa Rinoshanda | Inotarisa kana pcb inoshanda mushure megungano. |
AOI inoshandisa makamera kutsvaga zvikamu zvisipo nemajoini akaipa. X-ray anotarisa mukati pcb kuwana makatsemuka uye makomba. Inoshanda yekuongorora inotarisa kana pcb inoshanda. Iwe unoshandisa nzira idzi kubata matambudziko asati anyanya kuipa.
Controlled Atmosphere
Iwe unogona kushandisa nitrogen panguva yekuyerera kwekutengesa. Nitrogen inobatsira iwe kugadzira majoini ari nani uye mabhodhi akasimba. Heino tafura inoratidza zvinobatsira:
Batsirwa | tsananguro |
|---|---|
Kugadzirwa kweokisijeni | Nitrogen inoderedza maokisi panguva yekunyunguduka. |
Wettability kunatsiridza | Solder inoyerera zvirinani uye inoita majoini akasimba. |
Yakaderedzwa kuremara | Iwe unowana mashoma matambudziko senge bad solder uye bhiriji. |
Flexibility mukusarudza kwekuyerera | Iwe unogona kushandisa mamwe marudzi ekuyerera nekuti mweya unodzorwa. |
Post-kuchenesa zvinodiwa | Iwe unopedza nguva shoma uchichenesa mushure mekutengesa. |
Enhanced kuvimbika | Soldering munitrogen inoita kuti pcb yako igare kwenguva refu. |
Ongorora: Kushandisa nitrogen mune reflow soldering kunobatsira iwe kugadzira majoini akasimba uye kuderedza hurema.
Common Defects uye Solutions
Unogona kuona matambudziko akafanana tombstoneng, bridging, uye voids mu pcb yako. Unogona kugadzirisa izvi nekutevera matanho akanaka. Heino rondedzero yemhinduro:
Ita iyo stencil kuvhurika 80-90% yepadhi saizi uye uenderane neiyo pcb marongero.
Kudzora solder namatidza huwandu. Shandisa stencil ukobvu hwe 0.1-0.15 mm kune zvidimbu zvidiki kumisa yakawandisa paste.
Chinja reflow profile. Shandisa inononoka-kukwira mwero (1-3°C pasekondi) mupreheat kumisa kukurumidza kunyungudika solder.
Tarisa chikamu chekuiswa. Shandisa yakanaka pick-ne-nzvimbo michina yekuisa chaiko.
Balance profile reflow. Isa preheat pa 150-180 ° C kwemasekonzi 60-90 kuchengetedza kupisa.
Ita dhizaini yepedhi zvakafanana. Ita shuwa kuti mapedhi pasi pezvikamu akaenzana saizi uye chimiro.
Tarisa solder paste pamapedhi. Shandisa maturusi eSPI kuti uve nechokwadi chekuisa kunyange pamapadhi ese ari maviri.
Ita kuti kuiswa kuve nani. Calibrate pick-ne-nzvimbo michina yekuisa zvikamu mukati me ± 0.05 mm.
Iwe tevera matanho aya kuti rega kukanganisa kwakajairika uye chengeta pcb yako ichishanda zvakanaka. Kudzora kwakanaka kwe solder paste, kupisa, kutarisa, uye nitrogen inokubatsira kugadzira majoini akasimba uye mabhodhi ari nani.
Zvitsva muReflow Soldering Process
Tekinoroji nyowani inoramba ichichinja maitiro anoita vanhu pcbs. Pane kuvandudzwa kukuru mu reflow soldering izvozvi. Zvimwe zvinhu zvitsva vacuum reflow, maovheni akangwara, uye kugadzira zvikamu zvidiki. Shanduko idzi dzinokubatsira kuita hukama huri nani. Vanoitawo mapuranga akareba. Zvidiki zvidiki zvekumusoro-zvikamu zvinoshandiswa kakawanda.
Vacuum Reflow
Vacuum reflow inoshandisa imba yakakosha yehovhoni. Iyi kamuri inotora mweya nemagasi panguva yekunyungudutsa. Inobatsira yakaderera voids mu solder majoini chete 1-2%. Nevacuum reflow, majoini anosimba. Kupisa kunofamba zviri nani kuburikidza nebhodhi. Izvi zvakakosha kune mota uye ndege. pcb wako anogona kugara kwenguva refu uye kubata zvakawanda kushushikana. Mavara mashoma asina simba anoreva kuita kuri nani.
Zano: Vacuum reflow inobatsira iwe kuwana yakasimba uye yakavimbika kubatana. Yakanakira kukwira pamusoro pemidziyo.
Mahwindo Akachenjera
Smart oveni inokupa iwe kutonga kwakawanda pamusoro pekutengesa. Vanoshandisa masensa kuona tembiricha nguva dzese. Matambudziko anowanikwa kare nemahovhoni aya. Iwe unogona kuona kuti maovheni akangwara anomisa sei kukanganisa patafura pazasi:
Fault Type | Impact paHunhu | Matipi Ekudzivirira |
|---|---|---|
Heater Kukundikana | Kushata kwakashata, zvikamu zvakakanganisika | Tarisa heaters, shandisa chaiyo-nguva chenjedzo |
Conveyor Calibration Drift | Zvimwe kukanganisa, kufanana nebhiriji | Calibrate kazhinji, tevera kumhanya kwe conveyor |
Thermal Spill Nyaya | Kusaenderana soldering, pcb kukuvara | Tarisa tembiricha nzvimbo, dzivirira mahombe ekupisa |
Kusapindirana kwemhepo | Kusavimbika soldering, kukundikana kwakawanda | Chenesa mafirita, kuyera kutamisa kupisa |
Kutonhodza System Kukundikana | Kuwedzera kukuvadza, kunodhura rework | Chengetedza kutonhora kwakachena, tarisa nzvimbo dzekutonhora |
Ovheni dzakangwara chengetedza tembiricha yakatsiga mukati me ±2°C. Izvi zvinokupa mhedzisiro yakanaka uye matambudziko mashoma. Iwe unochengetedza nguva nemari nekugadzirisa nyaya nekukurumidza.
Miniaturization yePCB Assembly
Kuita zvikamu zviduku zvachinja pcb gungano. Iwe zvino unoshandisa madiki mapedhi uye madiki epamusoro-anokwira zvikamu. Solder deposits idiki zvakare. Dzimwe nguva, imwe chete solder zviyo mafomu. Izvi zvinogona kuita kuti majoini asina simba. Kugadzirisa izvi, unotonhora nekukurumidza, pamusoro pe2 ° C pasekondi. New solder paste formula inobatsirawo.
Mamwe maturusi epamusoro anokwana pane imwe neimwe pcb.
Solder paste mavara madiki, saka kutonga kunofanirwa kuve kwakanyatso.
Pick nekuisa michina inoshandisa nzira mbiri kuenda nekukurumidza.
Kushanda tembiricha yakakwirira, kunyanya ine lead-isina solder.
Solder paste chemistry yakachinja nekuda kwekupisa kukuru.
Iwe unogona kuvaka mamwe mabhodhi akaoma uye kushanda nekukurumidza. Shanduko idzi dzinokubatsira kusangana nezvinodiwa zvemagetsi matsva. Millimeter yega yega yakakosha ikozvino.
Cherechedza: Musika wepasi rose wemaovheni ekudzoreredza uri kukura nekukurumidza. Izvi zvinoratidza kukosha kweaya mazano matsva ekugadzira pcbs.
Iwe unoshandisa reflow soldering kugadzira maPCB akasimba emagetsi matsva. Izvi zvinokutendera kuti udzore kupisa zvakanyanya. Inobatsira iwe kuwana yakasimba solder majoini uye mashoma matambudziko.
Kuchengeta kudzora kwekushisa inochengetedza zvikamu zvakachengeteka kubva pakukuvadzwa.
Yakanaka solder paste uye flux inobatsira zvikamu zvinonamira zvirinani.
Kutarisa mabhodhi uye kushandisa nitrogen kunoita kuti ashande kwenguva refu.
Smart oveni nemichina inobatsira kumisa kukanganisa.
Zvemagetsi zviri kuita zvidiki uye zvakaoma kuvaka. Iwe unofanirwa kusarudza reflow soldering kugadzirisa aya matambudziko uye kuita kuti zvigadzirwa zvigare.
FAQ
Chii chinangwa chikuru che reflow soldering?
Iwe unoshandisa reflow soldering kubatanidza zvikamu zvemagetsi kubhodhi. Iyi nzira inonyungudutsa solder paste kugadzira kubatana kwakasimba. Inokubatsira iwe kuvaka akavimbika uye emhando yepamusoro mabhodhi emidziyo yakawanda.
Unogona here kushandisa reflow soldering kumativi ese ePCB?
Ehe, unogona kushandisa reflow soldering pamativi ese. Iwe unotanga solder rimwe divi, ipapo flip bhodhi uye dzokorora maitiro. Iyi nzira inoshanda zvakanaka kune yakaoma akadhindwa edunhu mabhodhi.
Iwe unodzivirira sei kukanganisa panguva ye reflow soldering?
Iwe unodzora tembiricha mbiri uye shandisa yakakodzera solder paste. Iwe zvakare tarisa bhodhi nematurusi ekuongorora. Matanho aya anokubatsira kudzivisa matambudziko anowanikwa semakuva kana kubatanidza.
Sei nitrogen ichishandiswa mukuyerera kwekutengesa?
Iwe unoshandisa nitrogen kuderedza oxidation panguva yekutengesa. Iri gasi rinokubatsira kuwana majoini akachenesesa uye hurema hushoma. Nitrogen inovandudzawo simba rekubatanidza solder.
Ndeupi musiyano uripo pakati pereflow uye wave soldering?
Iwe unoshandisa reflow soldering kune pamusoro-inokwira zvikamu. Wave soldering inoshanda zvakanyanya kune kuburikidza-maburi zvikamu. Reflow inoshandisa hovhoni inopisa, nepo wave soldering inoshandisa wave solder yakanyungudutswa.
