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<meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center id="qgqbi"></center></dfn><sub id="qgqbi"></sub><u 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class="pic"><img src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258831015625/5527413.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="3o34cjq" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258831015625/5527413.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="kzbyacz" 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>韶關(guān)大批量SMT貼片,SMT貼片</p><p><span>***更新：</span>2020-09-19 01:07:03</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="bac8wta" 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="wv3cjq2" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="7rqco8v" class="box"><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)凝固時不平穩(wěn)； 4，韶關(guān)大批量SMT貼片、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，韶關(guān)大批量SMT貼片，SMT貼片中無鉛焊點(diǎn)中的氣孔，韶關(guān)大批量SMT貼片、空洞比較多。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。韶關(guān)大批量SMT貼片</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="韶關(guān)大批量SMT貼片,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258831015625/5527413.png"></div><p style="text-indent:25px">SMT貼片加工的優(yōu)點(diǎn):組裝密度高、電子產(chǎn)品體積小、重量輕，貼片元件的體積和重量只有傳統(tǒng)插裝元件的1/10左右，一般采用SMT之后，電子產(chǎn)品體積縮小40%~60%，重量減輕60%~80%?？煽啃愿?、抗振能力強(qiáng)。焊點(diǎn)缺陷率低，高頻特性好，減少了電磁和射頻干擾。易于實(shí)現(xiàn)自動化，提高生產(chǎn)效率。降低成本達(dá)30%~50%。節(jié)省材料、能源、設(shè)備、人力、時間等。正是由于SMT貼片加工的工藝流程的復(fù)雜，所以出現(xiàn)了很多的SMT貼片加工的工廠，專業(yè)做SMT貼片的加工，得益于電子行業(yè)的蓬勃發(fā)展，SMT貼片加工成就了一個行業(yè)的繁榮。中山SMT貼片技術(shù)SMT貼片加工中焊膏中焊劑含量太高，在回流焊過程中過多的焊劑的流動導(dǎo)致了元器件的移位。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="韶關(guān)大批量SMT貼片,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258632216797/5876714.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稱。PCB為印刷電路板。SMT是表面組裝技術(shù)（表面貼裝技術(shù)），是電子組裝行業(yè)里比較流行的一種技術(shù)和工藝。電子電路表面組裝技術(shù)，稱為表面貼裝或表面安裝技術(shù)。它是一種將無引腳或短引線表面組裝元器件（簡稱SMC/SMD，中文稱片狀元器件）安裝在印制電路板的表面或其它基板的表面上，通過再流焊或浸焊等方法加以焊接組裝的電路裝連技術(shù)。在通常情況下我們用的電子產(chǎn)品都是由pcb加上各種電容，電阻等電子元器件按設(shè)計(jì)的電路圖設(shè)計(jì)而成的,所以形形**的電器需要各種不同的SMT貼片加工工藝來加工?。</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?、PCB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。SMT貼片加工技術(shù)是實(shí)現(xiàn)電子產(chǎn)品小型化、高集成不可缺少重要貼裝工藝。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="韶關(guān)大批量SMT貼片,SMT貼片" src="https://tyunfile.71360.com/UploadFile/haomingdianzi/637330258869951172/8176008.png"></div><p style="text-indent:25px">在SMT貼片加工的錫膏中比較常用的錫粉顆粒與助焊劑的體積之比約為1：1。SMT貼片加工開始之前，錫膏一定要經(jīng)過回溫（錫膏的特性和要求使它必須要低溫存儲）和充分的攪拌。比較關(guān)鍵的是回溫不能使用超常加熱的方式進(jìn)行回溫。PCBA加工完成之后，如果客戶沒有及時提貨或者需要暫時存放的話，首先要注意存儲方式。之后要考慮到客戶的貨運(yùn)渠道，來選擇相應(yīng)的包裝方式和程度。并且注意環(huán)境的干濕程度，以免沒有加裝外殼和沒有涂敷三防漆的產(chǎn)品在這個過程中出現(xiàn)受潮、氧化等不良。SMT貼片加工的主要目的是將表面組裝元器件準(zhǔn)確安裝到PCB的固定位置上。江門SMT貼片廠</p><p style="text-indent:25px">中山附近有哪些SMT貼片廠？韶關(guān)大批量SMT貼片</p><p style="text-indent:25px">制作首件時發(fā)現(xiàn)時實(shí)物與SMT貼片位置圖的參數(shù)不一致時，首先我們先核對其原始BOM，查一下到底是哪一個環(huán)節(jié)出錯，如果是SMT貼片位置圖問題，馬上反饋給品質(zhì)相關(guān)人員處。如果是工程程式打錯，則通知工程更換程序。更正之后需再次核對整塊板。紅膠板要測試其拉力。測試OK的板正常過爐之后，我們需檢查其焊接效果。當(dāng)正常生產(chǎn)時，如果同一位置或同一種缺陷多次出現(xiàn)時，我們應(yīng)立即通知工程改善，并監(jiān)督改善情況。正常情況下一訂單只做一次首件并保留到清尾。韶關(guān)大批量SMT貼片</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，是一家生產(chǎn)型的公司。公司業(yè)務(wù)涵蓋汽車周邊產(chǎn)品，智能電子鎖，藍(lán)牙系列，網(wǎng)絡(luò)直播聲卡等，價(jià)格合理，品質(zhì)有保證。公司將不斷增強(qiáng)企業(yè)重點(diǎn)競爭力，努力學(xué)習(xí)行業(yè)知識，遵守行業(yè)規(guī)范，植根于電子元器件行業(yè)的發(fā)展。浩明電子憑借創(chuàng)新的產(chǎn)品、專業(yè)的服務(wù)、眾多的成功案例積累起來的聲譽(yù)和口碑，讓企業(yè)發(fā)展再上新高。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1334100.html</p></div></div></div></div></div><div id="7prjqho" class="page-right twoColRt"><div id="nhelnur" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="d7sdf3u" 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="kzwyumd" class="recomPic likePro"><a 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