Chii Chichaitika Kana PCB Material uye Saizi Zvisina Kukodzera?

1. Zvinoenderana nezvinodiwa zveGJB3835, mushure mehondo uye deformation welding yePCBA mureflow ovenwelding process, iyo yakanyanya warping uye kukanganisa haipfuure 0.75%, uye warping uye kukanganisa kwePCB ine yakanaka-spacing zvikamu hazvipfuure 0.5%.
2. PCBA ine warping iri pachena, kana iyo-multi-layer PCBA ine deformation stress, kusanganisira kusimbiswa kwesimbi furemu kugadzika, chassis platform screw installation, chassis guide rail guide groove kupinza uye kumwezve reverse deformation installation (insertion), Zvingango konzera kukuvadzwa kana kutyoka kumaburi emetalization ewaya dzakadhindwa senge yakakwira-density IC uye zvimwe zvikamu zvinotungamira, BGA/CCGA solder majoini uye relay maburi e multilayer PCB.

3. PCBA ine kukanganisa kana kukotama kusvika ku0.75% ichaiswa maererano nemitemo inotevera kana yakasimbiswa kuti deformation stress haina kukonzera kukanganisa kwechikamu uye matambudziko ekuvimbika uye inoda kuramba ichishandiswa.
Isa (insert) uye screw fastening yakananga pachikuva chechasi, gwara regiyo, gwara renjanji kana mbiru haifanirwe kuitwa kudzivirira kumwe kukuvadzwa kwezvinhu uye maburi ane simbi anokonzerwa nereverse deformation kusagadzikana kwePCB yekumisikidza gungano.
Matanho ekurara emunharaunda (yemagetsi kana ekupisa ekufambisa zvinhu) anotorwa panzvimbo iyo kukanganisa uye kubhenda deformation gap ndiyo hombe, pasina kukanganisa kuvimbika kwekuisirwa uye kuona iyo huru yekupisa kana conductive nzira.The warping chikamu chinogona kuiswa uye kusungirirwa chete pasi pemamiriro ekuti akaremara akadhindwa redunhu bhodhi gungano haritakure reverse deformation kushushikana.

4. Kusimba uye kusimba kwekugadzirisa zvinhu zvakasarudzwa nokuda kwePCB yekuisa chimiro uye chigadziro chekusimbisa hazvizokonzeri kukanganisa kana kutapudza kwehuta kana kudzorera kushanduka kwePCB.

5. Nokuti multilayer PCBA ine pachena kukanganisa kana kukotama, kana kukanganisa (kukotama) isingasviki 0.75%, kunyanya PCBA akashongedzerwa yakakwirira-density IC, BGA/CCGA components, kururamisa kana anti-deformation kugadzwa PCB inofanira kunyatsodziviswa. .