1. Chii chinonzi pendi yehutatu-uchapupu?
Matatu anti-pendi imhando yakakosha yependi, inoshandiswa kuchengetedza mabhodhi edunhu nemichina yakabatana kubva mukukukurwa kwezvakatipoteredza. Iyo pende yehutatu-uchapupu ine kupikisa kwakanaka kune yakakwirira uye yakaderera tembiricha; inoumba firimu rekudzivirira rakajeka mushure mekurapa, iro rine yakanakisa insulation, kunyorova kwemvura, kudonha kwemvura, kushomeka kuramba, guruva rekudzivirira, corrosion resistance, kuchembera kuramba, corona resistance nezvimwe zvinhu.
Mumamiriro ezvinhu chaiwo, akadai semakemikari, vibration, huru huru, munyu wekupfapfaidza, humidity uye kupisa kwakanyanya, bhodhi redunhu rinogona kunge riine ngura, kupfava, deformation, mildew uye mamwe matambudziko, izvo zvinogona kuita kuti bhodhi redunhu risashande.
Iyo pendi ine humbowo hutatu inoputirwa pamusoro pebhodhi redunhu kuti iite mutsetse wechitatu-uchapupu hwekudzivirira firimu (hutatu-uchapupu hunoreva anti-unyoro, anti-salt spray uye anti-mildew).
Mumamiriro ezvinhu chaiwo, akadai semakemikari, vibration, huru huru, munyu wekupfapfaidza, humidity uye kupisa kwakanyanya, bhodhi redunhu rinogona kunge riine ngura, kupfava, deformation, mildew uye mamwe matambudziko, izvo zvinogona kuita kuti bhodhi redunhu risashande.
Iyo pendi ine humbowo hutatu inoputirwa pamusoro pebhodhi redunhu kuti iite mutsetse wechitatu-uchapupu hwekudzivirira firimu (hutatu-uchapupu hunoreva anti-unyoro, anti-salt spray uye anti-mildew).
2, izvo zvinotsanangurwa uye zvinodiwa zveatatu anti-pendi maitiro
Painting zvinodiwa:
1. Pfaya pendi ukobvu: pendi firimu ukobvu inodzorwa mukati 0.05mm-0.15mm. Iyo yakaoma firimu ukobvu ndeye 25um-40um.
2. Secondary coating: Kuti ive nechokwadi chekuwanda kwezvigadzirwa zvine zvinodiwa zvekudzivirira zvakanyanya, kupfekedza kwechipiri kunogona kuitwa mushure mekunge firimu rependi rarapwa (sarudza kana kuita chechipiri coating maererano nezvinodiwa).
3. Kuongorora nekugadzirisa: tarisa kutarisa kana bhodhi redunhu rakaputirwa rinosangana nezvinodiwa zvehutano, uye kugadzirisa dambudziko. Semuenzaniso, kana mapini nedzimwe nzvimbo dzekudzivirira dzakasvibiswa nependi yehutatu-uchapupu, shandisa tweezers kubata bhora rekotoni kana bhora rakachena rekotoni rakanyikwa mumvura yekuwachira kuti uichenese. Paunenge uchikwesha, chenjerera kuti usageza firimu rependi rakajairika.
4. Kutsiviwa kwezvikamu: Mushure mokunge firimu repende rapora, kana iwe uchida kutsiva zvikamu, unogona kuita sezvinotevera:
(1) Solder zvinhu zvacho zvakananga nesimbi yechromium yemagetsi, wobva washandisa jira redonje rakanyikwa mumvura yebhodhi kuchenesa zvinhu zvakatenderedza padhi.
(2) Welding zvimwe zvikamu
(3) Shandisa bhurasho kunyudza pendi ine-zvitatu-zvipupuriro kukwesha chikamu chewelding, uye ita kuti firimu rependi riome nekusimba.
Operation zvinodiwa:
1. Nzvimbo yebasa yependi inodzivirira katatu inofanira kunge isina guruva uye yakachena, uye hapafaniri kuva neguruva rinobhururuka. Kufefetera kwakanaka kunofanirwa kupihwa uye vashandi vasina basa vanorambidzwa kupinda.
2. Pfeka masiki kana magasi egasi, magirovhosi erubha, magirazi ekudzivirira emakemikari uye zvimwe midziyo yekudzivirira panguva yekushanda kudzivirira kukuvara kumuviri.
3. Mushure mokunge basa rapera, chenesa zvishandiso zvakashandiswa munguva, uye kuvhara uye zvakasimba kuvhara mudziyo nependi yehutatu.
4. Anti-static matanho anofanirwa kutorwa kumapuranga edunhu, uye mabhodhi edunhu haafaniri kupindirana. Munguva yekuputira, mapuranga edunhu anofanira kuiswa akatwasuka.
Hunhu hunodiwa:
1. Pamusoro pebhodhi redunhu haifanire kuve nependi inoyerera kana kudonha. Kana iyo pende yakapendwa, haifanirwe kudonha kune chikamu chakasarudzika.
2. Iyo yetatu-uchapupu pendi layer inofanira kunge yakati sandara, yakajeka, yunifomu muhukobvu, uye kudzivirira pamusoro pepadhi, chigamba chikamu kana conductor.
3. Pamusoro pepende yepende uye zvikamu hazvifanirwe kunge zvine hurema hwakadai sebubbles, pinholes, ripples, shrinkage makomba, guruva, nezvimwewo uye zvinhu zvekune dzimwe nyika, hapana chalking, hapana peeling chiitiko, cherechedza: firimu repende risati raoma, ita. kwete kubata pendi pamadiro membrane.
4. Zvikamu zvakasarudzika kana nzvimbo hazvigone kuputirwa nependi ine humbowo hutatu.
3. Zvikamu uye midziyo isingagone kuputirwa nependi inowirirana
(1) Midziyo yakajairika isingabatike: pendi ine simba redhiyata, singi yekupisa, simba rekudzivirira, simba guru-simba, simende resistor, code switch, potentiometer (adjustable resistor), buzzer, bhatiri inobata, fuse holder, IC sockets, chiedza. touch switch, relays uye mamwe marudzi ezvigadziko, pini misoro, terminal blocks uye DB9, plug-in kana SMD light-emitting diodes (isina-inoratidza basa), machubhu edhijitari, pasi screw holes.
(2) Zvikamu nemidziyo inotsanangurwa nemadhirowa isingagone kushandiswa nependi yehutatu-uchapupu.
(3) Maererano ne "Catalogue of Non-Three-proof Components (Nzvimbo)", zvinotaridzirwa kuti michina ine pende yehutatu-huchapupu haigoni kushandiswa.
Kana iyo yakajairwa isingabatike michina iri mumirau ichida kuvharwa, inogona kupfekedzwa neatatu-uchapupu coating inotsanangurwa nedhipatimendi reR&D kana kudhirowa.
Chechina, kungwarira kwematatu ekudzivirira-kupfapfaidza pendi ndeaya anotevera
1. Iyo PCBA inofanira kugadzirwa nemupendero wakagadzirwa uye hupamhi haufaniri kuva pasi pe5mm, kuitira kuti zvive nyore kufamba pamushini.
2. Iyo yakareba kureba uye upamhi hwePCBA board ndeye 410 * 410mm, uye hushoma ndeye 10 * 10mm.
3. Iyo yakareba urefu hwePCBA yakasungirirwa zvikamu ndeye 80mm.
4. Chinhambwe chiri pakati penzvimbo yakapfapfaidzwa nenzvimbo isina kupfapfaidzwa yezvikamu paPCBA i3mm.
5. Kunyatsochenesa kunogona kuvimbisa kuti masara ehuori abviswa zvachose, uye ita kuti pende yehutatu-uchapupu inonamatira pamusoro pebhodhi redunhu zvakanaka. Ukobvu hwepende huri nani pakati pe 0.1-0.3mm. Kubika mamiriro: 60 ° C, 10-20 maminitsi.
6. Munguva yekupfapfaidza, zvimwe zvikamu hazvigone kupfapfaidzwa, senge: high-power radiating surface kana radiator components, power resistors, power diode, simenti resistors, dial switches, adjustable resistors, buzzers, Battery holder, insurance holder (tube) , IC inobata, yekubata switch, nezvimwe.
V. Nhanganyaya yedare redunhu tri-proof pendi rework
Apo bhodhi redunhu rinoda kugadziriswa, zvikamu zvinodhura pabhodhi redunhu zvinogona kutorwa zvakasiyana uye zvakasara zvinogona kuraswa. Asi nzira yakajairika ndeyekubvisa firimu rekudzivirira pane zvese kana chikamu chebhodhi redunhu, uye kutsiva zvakakanganiswa zvikamu chimwe nechimwe.
Paunenge uchibvisa firimu yekudzivirira yepende yehutatu-uchapupu, iva nechokwadi chokuti substrate iri pasi pechikamu, zvimwe zvikamu zvemagetsi, uye chimiro chiri pedyo nenzvimbo yekugadzirisa hazvizokuvadzi. Nzira dzekudzivirira dzekubvisa firimu dzinonyanya kusanganisira: kushandisa makemikari zvinonyungudutsa, micro-grinding, mechanical nzira uye desoldering kuburikidza nefirimu inodzivirira.
Kushandiswa kwemakemikari zvinonyungudutsa ndiyo inonyanya kushandiswa nzira yekubvisa firimu rekudzivirira retatu-uchapupu pende. Chinokosha chiri mumakemikari emufirimu anodzivirira kuti abviswe uye makemikari emushonga chaiwo.
Micro-kugaya kunoshandisa yakakwirira-speed particles akadzingwa kubva mumuromo "kukuya" firimu rinodzivirira retatu-uchapupu pendi pabhodhi redunhu.
Iyo mechanical method ndiyo nzira iri nyore yekubvisa firimu rekudzivirira retatu-uchapupu pepende. Desoldering kuburikidza neinodzivirira firimu ndiko kutanga wavhura gomba rekudonhedza mufirimu rinodzivirira kuti solder yakanyungudutswa ibudiswe.