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A. Tsanangudzo pfupiso
Madiro eiyo press-fit connector yatakagadzira ndeye
zvakapfupikiswa muTable II.
MuTafura II, "Size" zvinoreva hupamhi hwekusangana kwechirume (iyo inonzi "Tab Size") mumm.
B. Yakakodzera Kubatana Simba Range Kutsunga
Senhanho yekutanga yepress-fit terminal dhizaini, isu tinofanira
sarudza huwandu hwakakodzera hwekubatana nesimba.
Nechinangwa ichi, iyo deformation hunhu madhayagiramu e
materminal uye nemaburi-maburi anodhirowa zvine hurongwa, sezvakaratidzwa
muFig. 2. Zvinoratidzwa kuti masimba ekusangana ari muakisi yakatwasuka,
nepo terminal saizi uye kuburikidza-gomba madhayamita ari mu
horizontal axis zvichiteerana.
C. Minimum Contact Force Kutsunga
Iyo shoma yekubata simba yakatemwa ne (1)
kuronga kusangana kwekupikisa kunowanikwa mushure mekutsungirira
bvunzo muakisi yakatwasuka uye yekutanga kubata simba mukati yakachinjika
axis, sezvinoratidzwa muFig. 3 schematically, uye (2) kutsvaga
shoma yekubata simba sekuvimbisa kubata kuramba kuve
yakaderera uye yakagadzikana.
Zvakaoma kuyera simba rekubata zvakananga kune iyo press fit yekubatanidza mukuita, saka takaiwana seinotevera:
(1) Kupinza materminal mumaburi, ane
madhayamita akasiyana-siyana kupfuura chiyero chakatarwa.
(2) Kuyera hupamhi hwekupedzisira mushure mekuiswa kubva ku
cross section cut samples (somuenzaniso, ona Fig. 10).
(3) Kushandura hupamhi hwekupedzisira hwakayerwa mu (2) kuita
kubata simba uchishandisa deformation hunhu
dhayagiramu yeiyo terminal yakawanikwa chaizvo sezvakaratidzwa mukati
Mufananidzo 2.
Mitsetse miviri yeterminal deformation inoreva imwe ye
hukuru uye hudiki terminal saizi nekuda kwekupararira mukati
nzira yekugadzira zvichiteerana.
Tafura II Scecification yeConnector yatakagadzira
Zviri pachena kuti simba rekubatana rakagadzirwa pakati
materminals uye kunyange-maburi anopiwa nemharadzano yemaviri
mifananidzo yezviteshi uye kuburikidza-maburi muFig. 2, iyo
zvinoreva mamiriro akaenzana ekutsikirirwa kwemagumo uye kuburikidza nekuwedzera kwegomba.
Isu takasarudza (1) iyo shoma yekubata simba
inodiwa kuita kusangana kwekupokana pakati pematerminals uye
kunyange-maburi akadzika uye akanyanya kugadzikana pamberi / mushure mekutsungirira
bvunzo dzemusanganiswa wemadiki terminal saizi uye
kukwirira kuburikidza-gomba dhayamita, uye (2) simba guru
zvakakwana kuti ive nechokwadi chekudzivirira kwekudzivirira pakati pepedyo
kuburikidza-maburi inodarika kukosha kwakatarwa (109Q yeizvi
Development) zvichitevera bvunzo dzekutsungirira dze
kusanganiswa kwehukuru hwekupedzisira hukuru uye hushoma
kuburikidza-gomba dhayamita, uko kuderera kwekudzivirira
Kupokana kunokonzerwa nekutorwa kwemwando mu
yakakuvadzwa (delaminated) nzvimbo muPCB.
Muzvikamu zvinotevera, nzira dzinoshandiswa kusarudza
hushoma nehukuru hwekusangana masimba zvichiteerana.
D. Maximum Contact Force Kutsunga
Zvinogoneka kuti interlaminar delaminations muPCB inokurudzira
kuderedzwa kwekudzivirira kwekudzivirira pakupisa kwakanyanya uye mukati
mhepo ine hunyoro kana iri pasi pekunyanya kusangana nesimba,
iyo inogadzirwa nekubatanidzwa kwepamusoro
saizi yekugumira uye iyo shoma kuburikidza ne-gomba dhayamita.
Mukusimudzira uku, iyo yakanyanya kubvumidzwa yekubata simba
yakawanikwa sezvinotevera;(1) kukosha kwekuedza kwe
shoma inobvumirwa insulation kureba "A" muPCB yaive
yakawanikwa pachine kuedza, (2) inobvumirwa
kureba kwe delamination kwakaverengerwa geometrically se (BC A)/2, uko "B" na "C" ndiwo mbiru inogumira uye
kuburikidza-gomba dhayamita zvichiteerana, (3) iyo chaiyo delamination
kureba muna PCB siyana kuburikidza-gomba diameters kwave
akawanikwa achiyedza uye akarongwa pakureba kwakaderedzwa
vs. dhayagiramu yesimba rekutanga, sezvakaratidzwa mumufananidzo 4
schematically.
Pakupedzisira, iyo yakanyanya kubata simba yakatemwa zvakadaro
sekuti usapfuure hurefu hunobvumirwa hwe delamination.
Iyo yekufungidzira nzira yekubatana masimba yakafanana ne
zvakataurwa muchikamu chakapfuura.
E. Terminal Shape Dhizaini
Iyo terminal shape yakagadzirwa kuti igadzire
simba rekubata rakakodzera (N1 kusvika N2) mune yakatemwa kuburikidza neburi
dhayamita renji uchishandisa mativi matatu ane magumo ekupedzisira
nzira (FEM), kusanganisira mhedzisiro yepre-plastiki deformation
kukurudzira mukugadzira.
Nekuda kweizvozvo, isu takatora terminal, yakaumbwa senge
"N-shape cross chikamu" pakati penzvimbo dzekusangana pedyo ne
pasi, iyo yakagadzira simba rinenge rakafanana rekusangana
mukati mezvakatemerwa kuburikidza-buri dhayamita renji, ine a
buri rakaboorwa pedyo nemuromo rinobvumira kukuvara kwePCB kuve
yakaderedzwa (Fig. 5).
Kuratidzwa mumufananidzo 6 muenzaniso wevatatu-dimensional
FEM modhi uye simba rekuita (kureva, simba rekubata) vs
displacement diagram yakawanikwa analytically.
F. Kuvandudzwa kweHard Tin Plating
Kune nzira dzakasiyana dzekurapa dzekudzivirira
oxidization yeCu paPCB, sekutsanangurwa kwazvino muII - B.
Panyaya yesimbi plating pamusoro kurapwa, akadai
tin kana sirivheri, kuvimbika kwekubatanidza kwemagetsi kwepress-fit
tekinoroji inogona kuvimbiswa nekusanganiswa ne
zvakajairika Ni plating zviteshi.Nekudaro mune iyo OSP,tin plating pamaterminals inofanira kushandiswa kwenguva yakarebaterm yemagetsi kubatana kuvimbika.
Nekudaro, yakajairwa tin plating pamaterminal (ye
semuenzaniso, we1ltm ukobvu) inogadzira iyo yekukwenya-kurezve tinpanguva yekuisa terminal.(Mufananidzo. "a" mumufananidzo 7)
uye uku kukwesha-kure zvimwe kunokonzera mapfupi-sekete nematerminals ari pedyo.
Naizvozvo takagadzira rudzi rutsva rwerata rakaoma
plating, iyo isingatungamiriri kune chero tin kukweshwa uyeiyo inovimbisa kuvimbika kwekubatanidza magetsi kwenguva refupanguva imwe chete.
Iyi nyowani yekuisa maitiro ine (1) yakawedzera mutete tin
kuisa pasi pasi, (2) kupisa (tin-reflow) maitiro,
iyo inoumba iyo yakaoma metallic alloy layer pakati pe
underplating uye tin plating.
Nekuti iyo yekupedzisira yasara yerata plating, ndicho chikonzero
yekukwenya-kure, pamaterminal inova yakaonda zvakanyanya uye
inogovera zvisina kufanana pane alloy layer, hapana kukwesha-kureyetin yakasimbiswa panguva yekuisa (Mufananidzo "b" mukatiMufananidzo 7).
Nguva yekutumira: Zvita-08-2022