110 chidziwitso cha SMT chip processing gawo 2

110 chidziwitso cha SMT chip processing gawo 2

56. Kumayambiriro kwa zaka za m'ma 1970, panali mtundu watsopano wa SMD m'makampani, omwe amatchedwa "mapazi osindikizidwa ochepa chip carrier", omwe nthawi zambiri ankasinthidwa ndi HCC;
57. Kukana kwa module ndi chizindikiro 272 kuyenera kukhala 2.7K ohm;
58. Mphamvu ya 100nF module ndi yofanana ndi ya 0.10uf;
Malo a eutectic a 63Sn + 37Pb ndi 183 ℃;
60. Zomwe zimagwiritsidwa ntchito kwambiri za SMT ndi zoumba;
61. Kutentha kwapamwamba kwambiri kwa ng'anjo yotentha ya reflow ndi 215C;
62. Kutentha kwa ng'anjo ya malata ndi 245c pamene iwunikiridwa;
63. Pazigawo za SMT, kutalika kwa mbale yopota ndi mainchesi 13 ndi mainchesi 7;
64. Mtundu wotsegulira wa mbale yachitsulo ndi square, triangular, round, star shape and plain;
65. Panopa ntchito kompyuta mbali PCB, zopangira zake ndi: galasi CHIKWANGWANI bolodi;
66. Ndi mtundu wanji wa gawo lapansi la ceramic mbale ndi solder phala la sn62pb36ag2 ntchito;
67. Rosin based flux imatha kugawidwa m'mitundu inayi: R, RA, RSA ndi RMA;
68. Kaya kukana kwa gawo la SMT ndikolunjika kapena ayi;
69. Pakali pano solder phala pa msika amangofunika 4 maola yomata nthawi kuchita;
70. Mphamvu yowonjezera ya mpweya yomwe imagwiritsidwa ntchito ndi zipangizo za SMT ndi 5kg / cm2;
71. Ndi njira yanji yowotcherera yomwe iyenera kugwiritsidwa ntchito pamene PTH kutsogolo sikudutsa mu ng'anjo ya malata ndi SMT;
72. Njira zowunikira zodziwika bwino za SMT: kuyang'ana kowonera, kuyang'ana X-ray ndi kuyang'ana masomphenya a makina
73. Njira yopangira kutentha kwa magawo okonza ferrochrome ndi conduction + convection;
74. Malingana ndi deta yamakono ya BGA, sn90 pb10 ndiye mpira woyambirira wa malata;
75. Njira yopanga zitsulo zachitsulo: kudula kwa laser, electroforming ndi etching mankhwala;
76. Kutentha kwa ng'anjo yowotcherera: gwiritsani ntchito thermometer kuti muyese kutentha komwe kulipo;
77. Pamene zinthu za SMT SMT zotsirizidwa pang'ono zimatumizidwa kunja, zigawozo zimakhazikika pa PCB;
78. Ndondomeko ya kayendetsedwe ka khalidwe lamakono tqc-tqa-tqm;
79. Mayeso a ICT ndi mayeso a bedi la singano;
80. Mayeso a ICT angagwiritsidwe ntchito kuyesa zida zamagetsi, ndipo kuyesa kwa static kumasankhidwa;
81. Makhalidwe azitsulo za soldering ndikuti malo osungunuka ndi otsika kuposa zitsulo zina, katundu wakuthupi ndi wokhutiritsa, ndipo fluidity ndi yabwino kuposa zitsulo zina pa kutentha kochepa;
82. Muyeso wokhotakhota uyenera kuyeza kuyambira pachiyambi pomwe njira zowotcherera ng'anjo zisinthidwa;
83. Siemens 80F / S ndi ya pakompyuta ulamuliro pagalimoto;
84. The solder phala makulidwe gauge ntchito laser kuwala kuyeza: solder phala digiri, solder phala makulidwe ndi solder phala kusindikiza m'lifupi;
85. Zigawo za SMT zimaperekedwa ndi oscillating feeder, disc feeder ndi coiling lamba feeder;
86. Ndi mabungwe ati omwe amagwiritsidwa ntchito pazida za SMT: mawonekedwe a cam, mawonekedwe a bar side, screw structure ndi sliding structure;
87. Ngati gawo loyang'anira mawonekedwe silingadziwike, BOM, chivomerezo cha wopanga ndi bolodi lachitsanzo ziyenera kutsatiridwa;
88. Ngati njira yolongedza magawo ndi 12w8p, sikelo ya pinth ya kauntala iyenera kusinthidwa kukhala 8mm nthawi iliyonse;
89. Mitundu ya makina owotcherera: ng'anjo yowotcherera mpweya wotentha, ng'anjo ya nayitrogeni, ng'anjo yowotcherera ya laser ndi ng'anjo yowotcherera ya infuraredi;
90. Njira zomwe zilipo zoyeserera za magawo a SMT: kuwongolera njira, kuyika makina osindikizira m'manja ndi kuyika manja;
91. Mawonekedwe a zilembo omwe amagwiritsidwa ntchito kwambiri ndi awa: bwalo, mtanda, masikweya, diamondi, makona atatu, Wanzi;
92. Chifukwa mbiri yobwezeretsanso sinakhazikitsidwe bwino mu gawo la SMT, ndi malo otenthetserako ndi malo ozizira omwe amatha kupanga kung'ambika kwa magawo;
93. Mapeto awiri a magawo a SMT amatenthedwa mosagwirizana komanso zosavuta kupanga: kuwotcherera opanda kanthu, kupatuka ndi piritsi yamwala;
94. Kukonza mbali za SMT zinthu ndi: chitsulo chosungunuka, chopopera mpweya wotentha, mfuti ya malata, zomangira;
95. QC lagawidwa IQC, IPQC,.FQC ndi OQC;
96. High liwiro Mounter akhoza phiri resistor, capacitor, IC ndi transistor;
97. Makhalidwe a magetsi osasunthika: ang'onoang'ono amakono ndi chikoka chachikulu ndi chinyezi;
98. Nthawi yozungulira ya makina othamanga kwambiri ndi makina a chilengedwe chonse ayenera kukhala oyenerera momwe angathere;
99. Tanthauzo lenileni la khalidwe ndikuchita bwino nthawi yoyamba;
100. Makina oyika ayenera kumamatira tizigawo tating'ono choyamba kenako zazikulu;
101. BIOS ndiye njira yoyambira / yotulutsa;
102. Zigawo za SMT zitha kugawidwa kukhala mtovu ndi wopanda lead malinga ndi mapazi;
103. Pali mitundu itatu yofunikira yamakina oyika omwe akugwira ntchito: kuyika kosalekeza, kuyika kosalekeza ndi zoyika zambiri zamanja;
104. SMT ikhoza kupangidwa popanda chojambulira;
105. Njira ya SMT imakhala ndi makina odyetserako chakudya, chosindikizira phala la solder, makina othamanga kwambiri, makina onse, kuwotcherera kwamakono ndi makina osonkhanitsa mbale;
106. Pamene magawo okhudzidwa ndi kutentha ndi chinyezi atsegulidwa, mtundu mu bwalo la khadi la chinyezi ndi buluu, ndipo zigawozo zingagwiritsidwe ntchito;
107. Muyezo wa 20 mm si m'lifupi mwake;
108. Zomwe zimayambitsa kufupika kwafupipafupi chifukwa cha kusasindikiza bwino panjira:
a.Ngati zitsulo za solder phala sizili bwino, zingayambitse kugwa
b.Ngati kutsegulidwa kwa mbale yachitsulo ndi yaikulu kwambiri, malata amakhala ochuluka kwambiri
c.Ngati mtundu wa zitsulo mbale ndi osauka ndi malata osauka, m'malo mwa laser kudula Chinsinsi
D. pali phala lotsalira la solder kumbuyo kwa stencil, kuchepetsa kupanikizika kwa scraper, ndikusankha vaccum yoyenera ndi zosungunulira.
109. Cholinga choyambirira cha uinjiniya wa zone iliyonse ya mbiri ya ng'anjo yowotcherera ndi motere:
a.Preheat zone;Cholinga cha uinjiniya: kusintha kwa kutentha mu solder phala.
b.Temperature equalization zone;Cholinga cha uinjiniya: kuyambitsa kwa flux kuchotsa ma oxides;kutuluka kwa chinyezi chotsalira.
c.Reflow zone;Cholinga cha uinjiniya: kusungunuka kwa solder.
d.Malo ozizira;Cholinga cha uinjiniya: aloyi ophatikizana solder, gawo la phazi ndi pedi lonse;
110. Mu ndondomeko ya SMT SMT, zifukwa zazikulu za solder mkanda ndi: Kusaoneka bwino kwa PCB pad, kusawonetsa bwino kwa mbale yachitsulo kutsegulidwa, kuya kwambiri kapena kupanikizika kwa kuika, kukwera kwakukulu kwa malo otsetsereka, kugwa kwa phala ndi kutsika kwa phala. .