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class="proBig"><div id="8t3nul8" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258666201172/1858767.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="qjqhjko" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258666201172/1858767.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="jdk3qcj" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>廣東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>上海電子裝配,SMT貼片</p><p><span>***更新：</span>2020-10-18 08:08:25</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="ice8zlh" 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="ose78fr" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="akmtabd" 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，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)來料檢測—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。2、雙面混裝工藝1)來料檢測—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—返修。先貼后插，適用于SMD元件多于分離元件的情況。2)來料檢測—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—返修，上海電子裝配。A面混裝，B面貼裝。3)來料檢測—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—返修。A面混裝，B面貼裝。先貼兩面SMD，回流焊接，后插裝，上海電子裝配，波峰焊。SMT貼片機(jī)的精度和質(zhì)量息息相關(guān)，上海電子裝配，如果長時(shí)間不做清理會造成堵塞氣路，造成氣路不暢。上海電子裝配</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海電子裝配,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258666201172/1858767.png"></div><p style="text-indent:25px">我們首先要明確一個(gè)問題：SMT貼片加工的費(fèi)用包含那幾個(gè)部分？開機(jī)費(fèi)、工程費(fèi)、鋼網(wǎng)費(fèi)，其余就是按照常規(guī)的點(diǎn)數(shù)算法核算出來的加工費(fèi)。很多SMT工廠都有較低消費(fèi)的限制在里面，這個(gè)限制是工廠正常的一次服務(wù)**的費(fèi)用，低于這個(gè)費(fèi)用就屬于虧損狀態(tài)，賠本的買賣是沒人做的，低于成本價(jià)就可能拒絕接您這單。一般達(dá)不到較低消費(fèi)是按照較低消費(fèi)來收取的，超出的按照正常的點(diǎn)數(shù)來算。有做過SMT貼片加工的朋友都知道，目前業(yè)內(nèi)的常規(guī)報(bào)價(jià)都是按點(diǎn)算。特殊工藝要求的可能會更貴。鎮(zhèn)江smt電子貼片加工廠制作首件時(shí)發(fā)現(xiàn)時(shí)實(shí)物與SMT貼片位置圖的參數(shù)不一致時(shí)，我們先核對其原始BOM，查一下到底是哪一個(gè)環(huán)節(jié)出錯(cuò)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海電子裝配,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258582382813/5781319.png"></div><p style="text-indent:25px">SMT貼片加工固化：其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?；亓骱附樱浩渥饔檬菍⒑父嗳诨?，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：其作用是對組裝好的PCB板進(jìn)行焊接質(zhì)量和裝配質(zhì)量的檢測。所用設(shè)備有放大鏡、顯微鏡、在線測試儀（ICT）、**測試儀、自動光學(xué)檢測（AOI）、X-RAY檢測系統(tǒng)、功能測試儀等。位置根據(jù)檢測的需要，可以配置在生產(chǎn)線合適的地方。返修：其作用是對檢測出現(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。</p><p style="text-indent:25px">SMT貼片加工中造成空洞、裂紋的原因很多，主要有以下方面因素： 1、焊接面（PCB焊盤與元件焊端表面）存在浸潤不良； 2、焊料氧化； 3、焊接面各種材料的膨脹系數(shù)不匹配，焊點(diǎn)凝固時(shí)不平穩(wěn)； 4、再流焊溫度曲線的設(shè)置未能使焊音中的有機(jī)揮發(fā)物及水分在進(jìn)入回流區(qū)前揮發(fā)。無鉛焊料的問題是高溫、表面張力大、黏度大。表面張力的增加勢必會使氣體在冷卻階段的外逸更困難，氣體不容易排出來，使空洞的比例增加。因此，SMT貼片中無鉛焊點(diǎn)中的氣孔、空洞比較多。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="上海電子裝配,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258831015625/5527413.png"></div><p style="text-indent:25px">SMT貼片加工過程中的防靜電：1、定期檢查STM貼片加工廠內(nèi)外的接地系統(tǒng)。車間外的接地系統(tǒng)應(yīng)每年檢測一次，電阻要求在20以下改線時(shí)需要重新測試。防靜電桌墊、防靜電地板墊、接地系統(tǒng)應(yīng)每6個(gè)月測試一次，應(yīng)符合SMT貼片防靜電接地要求。檢測機(jī)器與地線之間的電阻時(shí)，要求電阻為1MΩ，并做好檢測記錄。2、每天測量車間內(nèi)溫度濕度兩次，并做好有效記錄，以確保生產(chǎn)區(qū)恒溫、恒濕。3、SMT貼片加工的任何操作員進(jìn)入車間之前必須做好防靜電措施。SMT貼片加工中施加焊膏的工藝目的是把適量的焊膏均勻地施加在PCB的焊盤上。鎮(zhèn)江smt電子貼片加工廠</p><p style="text-indent:25px">SMT貼片工廠中，我們大多數(shù)的企業(yè)常用的錫膏合金主要成份為Sn/Pb合金，且合金進(jìn)行比例為63/37。上海電子裝配</p><p style="text-indent:25px">加工SMT貼片小批量貴是因?yàn)闆]有太多的數(shù)量來分?jǐn)傁鄳?yīng)的費(fèi)用。對于PCBA加工廠來說：“客戶做1片，跟做10000片所需要的工序流程是沒有一丁點(diǎn)差別的”比如元器件檢測、存樣入系統(tǒng)、錫膏回溫?cái)嚢琛CB烘烤、貼片編程、SPI檢測、AOI檢測、首件檢測、老化測試、組裝包裝出貨等等工序。量不大、工序一樣沒少。較大的成本就在于頻繁的轉(zhuǎn)線、換料，時(shí)間成本和人工成本難以縮減。比較簡單的就是機(jī)器剛跑起來就要停下來，真的非常影響生產(chǎn)效率。所以如果不是專業(yè)配置打樣線的PCB加工廠。一般也不會接小批量SMT貼片加工的訂單。上海電子裝配</p><p style="text-indent:25px">中山市浩明電子科技有限公司致力于電子元器件，以科技創(chuàng)新實(shí)現(xiàn)***管理的追求。公司自創(chuàng)立以來，投身于smt貼片，智能電子鎖，藍(lán)牙系列，網(wǎng)絡(luò)直播聲卡，是電子元器件的主力軍。浩明電子繼續(xù)堅(jiān)定不移地走高質(zhì)量發(fā)展道路，既要實(shí)現(xiàn)基本面穩(wěn)定增長，又要聚焦關(guān)鍵領(lǐng)域，實(shí)現(xiàn)轉(zhuǎn)型再突破。浩明電子創(chuàng)始人董志嶺，始終關(guān)注客戶，創(chuàng)新科技，竭誠為客戶提供良好的服務(wù)。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1603399.html</p></div></div></div></div></div><div id="8vzbseq" class="page-right twoColRt"><div id="88bx8no" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="r2qnzlx" class="recomPic likePro"><a href="http://www.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 id="y3ipwnz" class="recomPic likePro"><a 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