110 abubuwan ilimin SMT na sarrafa guntu na 2
56. A farkon 1970s, akwai wani sabon nau'in SMD a cikin masana'antar, wanda ake kira "hatimin ƙafar ƙafar ƙafar ƙafar ƙafa", wanda sau da yawa HCC ya maye gurbinsa;
57. Juriya na module tare da alamar 272 ya kamata ya zama 2.7K ohm;
58. Ƙarfin 100nF module daidai yake da na 0.10uf;
Ma'anar eutectic na 63Sn + 37Pb shine 183 ℃;
60. Mafi yawan amfani da albarkatun kasa na SMT shine yumbu;
61. Mafi girman zafin jiki na reflow tander zazzabi kwana ne 215C;
62. Zazzabi na tanderun tin shine 245c lokacin da aka duba shi;
63. Domin SMT sassa, diamita na coiling farantin ne 13 inci da 7 inci;
64. Nau'in buɗewa na farantin karfe yana da murabba'i, triangular, zagaye, siffar tauraro da fili;
65. A halin yanzu ana amfani da PCB gefen kwamfuta, albarkatunsa shine: allon fiber gilashi;
66. Wani irin substrate yumbu farantin ne solder manna na sn62pb36ag2 da za a yi amfani da;
67. Rosin tushen motsi za a iya raba nau'i hudu: R, RA, RSA da RMA;
68. Ko juriya na sashin SMT shine jagora ko a'a;
69. The halin yanzu solder manna a kasuwa kawai bukatar 4 hours m lokaci a yi;
70. Ƙarin ƙarfin iska wanda kayan aikin SMT ke amfani da shi kullum shine 5kg / cm2;
71. Wane irin hanyar walda ya kamata a yi amfani da shi lokacin da PTH a gefen gaba ba ta wuce ta cikin tanderun tin tare da SMT ba;
72. Hanyoyin dubawa na yau da kullum na SMT: dubawa na gani, dubawar X-ray da duban hangen nesa na na'ura
73. Hanyar zafin zafi na sassan gyaran ferrochrome shine ƙaddamarwa + convection;
74. Dangane da bayanan BGA na yanzu, sn90 pb10 shine ƙwallon tin na farko;
75. Hanyar masana'anta na farantin karfe: yankan laser, electroforming da etching sunadarai;
76. Zazzabi na tanderun walda: yi amfani da ma'aunin zafi da sanyio don auna zafin da ya dace;
77. Lokacin da aka fitar da samfurin SMT SMT da aka kammala, an gyara sassan akan PCB;
78. Tsarin sarrafa ingancin zamani tqc-tqa-tqm;
79. Gwajin ICT gwajin gado ne na allura;
80. Ana iya amfani da gwajin ICT don gwada sassa na lantarki, kuma an zaɓi gwajin a tsaye;
81. Siffofin sayar da tin shine cewa wurin narkewa ya yi ƙasa da sauran karafa, abubuwan da ke cikin jiki suna da gamsarwa, kuma ruwa ya fi sauran ƙarfe a ƙananan zafin jiki;
82. Ya kamata a auna ma'auni daga farkon lokacin da aka canza yanayin yanayin walda na wuta;
83. Siemens 80F / S nasa ne na sarrafa sarrafa lantarki;
84. The solder manna kauri ma'auni yana amfani da Laser haske don auna: solder manna digiri, solder manna kauri da solder manna bugu nisa;
85. Ana ba da sassan SMT ta hanyar oscillating feeder, disc feeder da coiling belt feeder;
86. Waɗanne ƙungiyoyi ne ake amfani da su a cikin kayan aikin SMT: tsarin cam, tsarin bargon gefe, tsarin dunƙule da tsarin zamiya;
87. Idan ba za a iya gane sashin dubawa na gani ba, za a bi BOM, amincewar masana'anta da allon samfurin;
88. Idan hanyar shiryawa na sassa shine 12w8p, dole ne a daidaita ma'aunin pinth na counter zuwa 8mm kowane lokaci;
89. Nau'in na'urorin waldawa: wutar lantarki mai zafi mai zafi, tanderun walda na nitrogen, wutar lantarki na walƙiya da wutar lantarki na infrared;
90. Hanyoyin da ake samuwa don sassan SMT samfurin gwajin gwaji: ƙaddamar da samar da kayan aiki, kayan aikin bugu na hannu da bugu na hannu;
91. Siffofin alamar da aka saba amfani da su sune: da'ira, giciye, murabba'i, lu'u-lu'u, alwatika, Wanzi;
92. Saboda ba a saita bayanin martaba na reflow da kyau a cikin sashin SMT, shi ne yankin preheating da yankin sanyaya wanda zai iya samar da ƙananan ƙananan sassa;
93. The biyu iyakar SMT sassa suna mai tsanani unevenly da sauki kafa: komai waldi, sabawa da dutse kwamfutar hannu;
94. SMT sassa gyara abubuwa ne: soldering iron, zafi iska extractor, tin gun, tweezers;
95. An raba QC zuwa IQC, IPQC,.FQC da OQC;
96. High gudun Dutsen iya Dutsen resistor, capacitor, IC da transistor;
97. Halayen wutar lantarki mai mahimmanci: ƙananan halin yanzu da babban tasiri ta zafi;
98. Lokacin sake zagayowar na'ura mai sauri da na'ura na duniya ya kamata a daidaita su gwargwadon yiwuwar;
99. Gaskiyar ma'anar inganci ita ce yin kyau a farkon lokaci;
100. Na'urar sanyawa yakamata ya tsaya ƙananan sassa da farko sannan manyan sassa;
101. BIOS shine tsarin shigarwa / fitarwa na asali;
102. Za a iya raba sassan SMT zuwa gubar da marar guba gwargwadon ko akwai ƙafafu;
103. Akwai nau'ikan injunan sakawa na asali guda uku: ci gaba da sakawa, ci gaba da sakawa da yawa masu sanya hannu;
104. Ana iya samar da SMT ba tare da kaya ba;
105. Tsarin SMT ya ƙunshi tsarin ciyarwa, firintar manna mai solder, na'ura mai sauri, na'ura na duniya, walƙiya na yanzu da na'ura mai tattarawa;
106. Lokacin da aka buɗe sassa masu zafi da zafi, launi a cikin da'irar katin zafi shuɗi ne, kuma ana iya amfani da sassan;
107. Girman ma'auni na 20 mm ba nisa na tsiri ba;
108. Abubuwan da ke haifar da gajeren kewayawa saboda rashin bugu a cikin tsari:
a.Idan abun ciki na karfe na manna mai siyar ba shi da kyau, zai haifar da rushewa
b.Idan buɗaɗɗen farantin karfe ya yi girma, abin da ke cikin gwangwani ya yi yawa
c.Idan ingancin farantin karfe ba shi da kyau kuma tin ba shi da kyau, maye gurbin samfurin yankan Laser
D. akwai saura solder manna a baya na stencil, rage matsa lamba na scraper, kuma zaɓi dace vaccum da sauran ƙarfi.
109. Maƙasudin injiniya na farko na kowane yanki na bayanin martaba na reflow oven shine kamar haka:
a.Yankin preheat;niyya injiniya: juye juye a cikin manna solder.
b.Yankin daidaita yanayin zafi;niyyar injiniya: kunna juyi don cire oxides;numfashi na saura danshi.
c.Yankin sake kwarara;aikin injiniya niyya: solder narkewa.
d.Yankin sanyaya;aikin injiniya niyya: gami solder haɗin gwiwa abun da ke ciki, kashi kashi da kushin gaba ɗaya;
110. A cikin tsarin SMT SMT, manyan abubuwan da ke haifar da ƙwanƙwasa ƙwanƙwasa sune: ƙarancin hoto na PCB kushin, ƙarancin buɗe ido na farantin karfe, zurfin zurfi ko matsa lamba na jeri, maɗaukakiyar haɓakar gangaren bayanan martaba, rugujewar solder manna da ƙarancin danko. .
Lokacin aikawa: Satumba-29-2020