順德自動(dòng)SMT貼片工藝歡迎咨詢中山市浩明電子科技供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="雙面SMT貼片：雙面PCB板是兩面都有布線，必須要在兩面間有適當(dāng)?shù)碾娐愤B接才行。這種電路間的橋梁叫做導(dǎo)孔，導(dǎo)孔是在PCB上，順德自動(dòng)SMT貼片工藝，充滿或涂上金屬的小洞，它可以與兩面的導(dǎo)線相連接，可貼裝元件更多，因而雙面SMT貼片工藝更為復(fù)"><meta name="keywords" content="順德自動(dòng)SMT貼片工藝,SMT貼片"><link rel="canonical" href="http://m.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" 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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>順德自動(dòng)SMT貼片工藝,SMT貼片</p><p><span>***更新：</span>2021-02-07 01:09:48</p><p><span id="click" >瀏覽次數(shù)：6次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="wel3p9c" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">中山市浩明電子科技有限公司</a></p><p><span>聯(lián)系人：</span>劉江波</p><p><span>郵箱: </span>smtdong@126.com</p><p><span>電話: </span>13590701587</p><p><span>傳真: </span>0760_23880308</p><p><span>網(wǎng)址: </span>http://www.haomiandianzi.shop.88360.com</p><p><span>手機(jī): </span>0760-23880308</p><p><span>地址: </span>東區(qū)白沙灣第二工業(yè)區(qū)C2幢4樓</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="sg2molc" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="lyar2my" class="box"><p><p style="text-indent:25px">雙面SMT貼片：雙面PCB板是兩面都有布線，必須要在兩面間有適當(dāng)?shù)碾娐愤B接才行。這種電路間的橋梁叫做導(dǎo)孔，導(dǎo)孔是在PCB上，順德自動(dòng)SMT貼片工藝，充滿或涂上金屬的小洞，它可以與兩面的導(dǎo)線相連接，可貼裝元件更多，因而雙面SMT貼片工藝更為復(fù)雜。1、雙面組裝工藝1)來(lái)料檢測(cè)—PCB的A面絲印焊膏(點(diǎn)貼片膠)—貼片—烘干(固化)—A面回流焊接—清洗—翻板PCB的B面絲印焊膏(點(diǎn)貼片膠)—貼片—烘干—回流焊接，此工藝一般適用于在PCB兩面均貼裝有PLCC等較大的SMD時(shí)采用，順德自動(dòng)SMT貼片工藝。2、雙面混裝工藝1)來(lái)料檢測(cè)—PCB的B面點(diǎn)貼片膠—貼片—固化—翻板—PCB的A面插件—波峰焊—清洗—檢測(cè)—返修，順德自動(dòng)SMT貼片工藝。先貼后插，適用于SMD元件多于分離元件的情況。2)來(lái)料檢測(cè)—PCB的A面絲印焊膏—貼片—烘干—回流焊接—插件，引腳打彎—翻板—PCB的B面點(diǎn)貼片膠—貼片—固化—翻板—波峰焊—清洗—檢測(cè)—返修。A面混裝，B面貼裝。3)來(lái)料檢測(cè)—PCB的B面點(diǎn)貼片膠貼片—固化—翻板—PCB的A面絲印焊膏—貼片—A面回流焊接—插件—B面波峰焊—清洗—檢測(cè)—返修。A面混裝，B面貼裝。先貼兩面SMD，回流焊接，后插裝，波峰焊。SMT貼片的加工流程介紹。順德自動(dòng)SMT貼片工藝</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="順德自動(dòng)SMT貼片工藝,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258921669922/441409.png"></div><p style="text-indent:25px">SMT貼片加工固化：它的作用是將貼片膠融化，從而使表面組裝元器件與PCB板牢固粘接在一起。所用設(shè)備為固化爐，位于SMT生產(chǎn)線中貼片機(jī)的后面。回流焊接：其作用是將焊膏融化，使表面組裝元器件與PCB板牢固粘接在一起。所用設(shè)備為回流焊爐，位于SMT生產(chǎn)線中貼片機(jī)的后面。清洗：其作用是將組裝好的PCB板上面的對(duì)人體有害的焊接殘留物如助焊劑等除去。所用設(shè)備為清洗機(jī)，位置可以不固定，可以在線，也可不在線。檢測(cè)：其作用是對(duì)組裝好的PCB板進(jìn)行焊接質(zhì)量和裝配質(zhì)量的檢測(cè)。所用設(shè)備有放大鏡、顯微鏡、在線測(cè)試儀（ICT）、自動(dòng)光學(xué)檢測(cè)（AOI）、X-RAY檢測(cè)系統(tǒng)、功能測(cè)試儀等。位置根據(jù)檢測(cè)的需要，可以配置在生產(chǎn)線合適的地方。返修：其作用是對(duì)檢測(cè)出現(xiàn)故障的PCB板進(jìn)行返工。所用工具為烙鐵、返修工作站等。配置在生產(chǎn)線中任意位置。東莞自動(dòng)SMT貼片廠家由于SMT貼片無(wú)鉛焊接溫度比有鉛焊接高，尤其大尺寸、多層板，有熱容量大的元器件時(shí)，峰值溫度要達(dá)到260℃。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="順德自動(dòng)SMT貼片工藝,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258831015625/5527413.png"></div><p style="text-indent:25px">因?yàn)镾MT貼片無(wú)鉛焊接溫度比有鉛焊接高，尤其大尺寸、多層板，以及有熱容量大的元器件時(shí)，峰值溫度往往要達(dá)到260℃左右，冷卻凝固到室溫的溫差大，因此，無(wú)鉛焊點(diǎn)的應(yīng)力也比較大。再加上較多的IMC，IMC的熱膨脹系數(shù)比較大，在高溫工作或強(qiáng)機(jī)械沖擊下容易產(chǎn)生開(kāi)裂。QFP、Chp元件及BGA焊點(diǎn)空洞，分布在焊接界面的空洞會(huì)影響PCBA中個(gè)元器件的連接強(qiáng)度；SOJ引腳焊點(diǎn)裂紋及BGA焊球與焊盤界面的裂紋缺陷，焊點(diǎn)裂紋和焊接界面的裂紋都會(huì)影響PCBA產(chǎn)品的長(zhǎng)期可靠性。另一類是處于焊接界面的空洞(或稱微孔)，這類空洞非常小，甚至只有通過(guò)掃描電子顯微鏡（SEM）才能發(fā)現(xiàn)。空洞的位置和分布可能是造成電連接失效的潛在原因。特別是功率元件空洞測(cè)會(huì)使元件熱阻增大，造成失效。研究表明，焊接界面的空洞（微孔）主要是由于Cu的高溶解性造成的。由于無(wú)鉛焊料的熔點(diǎn)高，而且又是高Sn焊料，Cu在無(wú)鉛焊接時(shí)的溶解速度比Sn-Pb焊接時(shí)高許多。無(wú)鉛焊料中銅的高溶解性會(huì)在銅與焊料的界面產(chǎn)生“空洞”，隨著時(shí)間的推移，這些空洞有可能會(huì)削弱焊點(diǎn)的可靠性。</p><p style="text-indent:25px">SMT貼片拾片的注意事項(xiàng)：1.SMT貼片時(shí)的拾片高度不合適,由于元件厚度或Z軸高度設(shè)置錯(cuò)誤,檢查后按實(shí)際值修正。2.拾片坐標(biāo)不合適,可能由于供料器的供料中心沒(méi)有調(diào)整好,應(yīng)重新調(diào)整供料器。3.編帶供料器的塑料薄膜沒(méi)有撕開(kāi),一般都是由于卷帶沒(méi)有安裝到位或卷帶輪松緊不合適造成的,應(yīng)重新調(diào)整供料器。4.吸嘴堵塞,應(yīng)清洗吸嘴。5.吸嘴端面有臟物或有裂紋,造成漏氣。6.吸嘴型號(hào)不合適,孔徑太大會(huì)造成漏氣,孔徑太小會(huì)造成吸力不夠。7.氣壓不足或氣路堵塞,檢查氣路是否漏氣,增加氣壓或疏通氣路。SMT貼片加工中錫膏本身的粘性不夠，元器件在搬運(yùn)時(shí)發(fā)生振蕩、搖晃等問(wèn)題而造成了元器件移位。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="順德自動(dòng)SMT貼片工藝,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258649472657/2463037.png"></div><p style="text-indent:25px">SMT貼片指的是在PCB基礎(chǔ)上進(jìn)行加工的系列工藝流程的簡(jiǎn)稱，PCB（Printed Circuit Board)為印刷電路板。SMT有關(guān)的技術(shù)組成：1、電子元件、集成電路的設(shè)計(jì)制造技術(shù)；2、電子產(chǎn)品的電路設(shè)計(jì)技術(shù)；3、電路板的制造技術(shù)；4、自動(dòng)貼裝設(shè)備的設(shè)計(jì)制造技術(shù)；5、電路裝配制造工藝技術(shù)；6、裝配制造中使用的輔助材料的開(kāi)發(fā)生產(chǎn)技術(shù)。一般，轉(zhuǎn)塔上安裝有十幾到二十幾個(gè)貼片頭，每個(gè)貼片頭上安裝2~4個(gè)真空吸嘴(較早機(jī)型)至5~6個(gè)真空吸嘴(現(xiàn)在機(jī)型)。由于轉(zhuǎn)塔的特點(diǎn)，將動(dòng)作細(xì)微化，選換吸嘴、送料器移動(dòng)到位、取元件、元件識(shí)別、角度調(diào)整、工作臺(tái)移動(dòng)(包含位置調(diào)整)、貼放元件等動(dòng)作都可以在同一時(shí)間周期內(nèi)完成，所以實(shí)現(xiàn)真正意義上的高速度。目前較快的時(shí)間周期達(dá)到0.08~0.10秒鐘一片元件。SMT貼片加工的費(fèi)用包含那幾個(gè)部分？順德自動(dòng)SMT貼片工藝</p><p style="text-indent:25px">SMT生產(chǎn)工藝有兩條基本的工藝流程，即焊膏一回流焊工藝和貼片膠一波峰焊工藝。順德自動(dòng)SMT貼片工藝</p><p style="text-indent:25px">SMT貼片加工焊接后的清洗，對(duì)高要求的精密儀表等特殊要求的產(chǎn)品需要做三防處理，三防處理前要求有很高的清潔度，否則在潮熱或高溫等惡劣環(huán)境條件下會(huì)造成電性能下降或失效等嚴(yán)重后果。由于焊后殘留物的速擋，造成在線測(cè)或功能測(cè)時(shí)測(cè)試探針接觸不良，容易出現(xiàn)誤測(cè)對(duì)于高要求的產(chǎn)品，由于焊后殘留物的遮擋，使一些熱損傷、層裂等缺陷不能暴露出來(lái)，造成漏檢而影響可靠性。同時(shí)，殘?jiān)嘁灿绊懟宓耐庥^和板卡的商品性。焊后殘留物會(huì)影響高密度、多I/O連接點(diǎn)陣列芯片、倒裝芯片的連接可靠性。順德自動(dòng)SMT貼片工藝</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/3196722.html</p></div></div></div></div></div><div id="0gu83y2" class="page-right twoColRt"><div id="s7k3ude" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="ruw8828" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div 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