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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="atqikmt" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/rzwz888/637303273219833984/2007240.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="g2z83p3" 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>四川樣片SMT貼片價(jià)格,SMT貼片</p><p><span>***更新：</span>2020-12-20 07:09:37</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="adpm3z8" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">深圳市潤(rùn)澤五洲電子科技有限公司</a></p><p><span>聯(lián)系人：</span>劉路</p><p><span>郵箱: </span>6259193@qq.com</p><p><span>電話: </span>15813866860</p><p><span>傳真: </span>0755_</p><p><span>網(wǎng)址: </span>http://www.run-five.com</p><p><span>手機(jī): </span>0755-89884486</p><p><span>地址: </span>龍崗街道南聯(lián)瑞記路1號(hào)恒裕科技園A棟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="r8kef82" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="trt33ut" class="box"><p><p style="text-indent:25px">錫鉛焊料中，熔點(diǎn)在450℃以下的稱為軟焊料?？寡趸稿a是在工業(yè)生產(chǎn)中自動(dòng)化生產(chǎn)線上使用的焊錫，如波峰焊等。這種液體焊料暴露在大氣層中時(shí)，焊料極易氧化，這樣將產(chǎn)生虛焊，會(huì)影響焊接質(zhì)量。因此，在錫鉛焊料中加入少量的活性金屬，能形成覆蓋層以保護(hù)焊料不再繼續(xù)氧化，從而提高了焊接質(zhì)量。具有一定的機(jī)械強(qiáng)度：因錫鉛合金的強(qiáng)度比純錫、純鉛的強(qiáng)度要高。又因電子元器件本身的重量較輕，smt貼片中對(duì)焊點(diǎn)的強(qiáng)度要求不是很高，四川樣片SMT貼片價(jià)格，故能滿足其焊點(diǎn)的強(qiáng)度要求?？垢g性能好：焊接好的印制電路板不必涂抹任何保護(hù)層就能抵抗大氣的腐蝕，從而減少了工藝流程，四川樣片SMT貼片價(jià)格，降低了成本，四川樣片SMT貼片價(jià)格。電子產(chǎn)品追求小型化，以前使用的穿孔插件元件已無(wú)法縮小。四川樣片SMT貼片價(jià)格</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川樣片SMT貼片價(jià)格,SMT貼片" src="https://tyunfile.71360.com/UploadFile/rzwz888/637303273219833984/2007240.png"></div><p style="text-indent:25px">SMT貼片加工的包括：固化：固化是將貼片膠融化，是表面貼裝元器件固定在PCB焊盤(pán)上，一般采用熱固化；回流焊接：回流焊是通過(guò)重新熔化預(yù)先分配到印制板焊盤(pán)上的膏裝軟釬焊料，實(shí)現(xiàn)表面組裝元器件焊端或引腳與印制板焊盤(pán)之間機(jī)械與電氣連接的軟釬焊。它主要是靠熱氣流對(duì)焊點(diǎn)的作用,膠狀的焊劑在一定的高溫氣流下進(jìn)行物理反應(yīng)達(dá)到SMD的焊接；清洗：完成焊接過(guò)程后，板面需要經(jīng)過(guò)清洗，以去除松香助焊劑以及一些錫球，防止他們?cè)斐稍g的短路。四川樣片SMT貼片價(jià)格固化所用設(shè)備為固化爐，位于SMT生產(chǎn)線中貼片機(jī)的后面。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川樣片SMT貼片價(jià)格,SMT貼片" src="https://tyunfile.71360.com/UploadFile/rzwz888/637303272983007812/9521863.png"></div><p style="text-indent:25px">貼片加工和焊接檢測(cè)是對(duì)焊接產(chǎn)品的檢測(cè)。一般需要檢測(cè)的點(diǎn)有：檢測(cè)點(diǎn)焊表面是否光潔，有無(wú)孔洞、孔洞等；點(diǎn)焊是否呈月牙形，有無(wú)多錫少錫，有無(wú)立碑、橋梁、零件移動(dòng)、缺件、錫珠等缺陷。各部件是否有不同水平的缺陷；搜查焊接時(shí)是否有短路、導(dǎo)通等缺陷，檢查印刷電路板表面的顏色變化。在貼片加工過(guò)程中，要保證印刷電路板的焊接質(zhì)量，必須始終注意回流焊工藝參數(shù)是否合理。如果參數(shù)設(shè)置有問(wèn)題，則無(wú)法保證印刷電路板的焊接質(zhì)量。因此，在正常情況下，爐溫必須每天測(cè)試兩次，低溫測(cè)試一次。只有不斷完善焊接產(chǎn)品的溫度曲線，設(shè)定焊接產(chǎn)品的溫度曲線，能力擔(dān)保加工產(chǎn)品的質(zhì)量。</p><p style="text-indent:25px">SMT貼片加工編程的步驟：分為兩個(gè)階段，一是離線準(zhǔn)備工作。二是在線調(diào)試。每個(gè)SMT加工廠根據(jù)各自的SMT貼片機(jī)型號(hào)與管理模式不同具體的細(xì)節(jié)也有所差異。離線準(zhǔn)備工作如下：首先整理客戶提供的BOM清單，編程需要在電腦上進(jìn)行，所以好提供的是電子檔文件。一般是excel格式的。坐標(biāo)的提取。根據(jù)客戶提供的三種文件分：如果客戶發(fā)了已經(jīng)導(dǎo)出的excel或txt文檔的坐標(biāo)，那直接用編程軟件將坐標(biāo)和你整理好的BOM清單合并就可以了。客戶發(fā)來(lái)了PCB文件，那就需要自己導(dǎo)出坐標(biāo)了，一般用protel99或PADS2007就可以導(dǎo)出excel格式的?？蛻糁惶峁┝艘环軧OM，提供不了坐標(biāo)，這時(shí)候就需要掃描儀了，將PCB掃描后采點(diǎn)保存成CAD格式，然后將坐標(biāo)和BOM合成。SMT基本工藝構(gòu)成要素包括:絲?。ɑ螯c(diǎn)膠）,貼裝（固化）,回流焊接,清洗,檢測(cè),返修。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川樣片SMT貼片價(jià)格,SMT貼片" src="https://tyunfile.71360.com/UploadFile/rzwz888/637303273432421875/5369002.png"></div><p style="text-indent:25px">多年來(lái)，采用單調(diào)彎曲點(diǎn)測(cè)試方法是封裝的典型特征，該測(cè)試在 IPC/JEDEC-9702 《板面水平互聯(lián)的單調(diào)彎曲特性》中有敘述。該測(cè)試方法闡述了印刷電路板水平互聯(lián)在彎曲載荷下的斷裂強(qiáng)度。但是該測(cè)試方法無(wú)法確定大允許張力是多少。對(duì)于制造過(guò)程和組裝過(guò)程，特別是對(duì)于無(wú)鉛 PCA 而言，其面臨的挑戰(zhàn)之一就是無(wú)法直接測(cè)量焊點(diǎn)上的應(yīng)力。為多采用的用來(lái)描述互聯(lián)部件風(fēng)險(xiǎn)的度量標(biāo)準(zhǔn)是毗鄰該部件的印刷電路板張力，這在 IPC/JEDEC-9704 《印制線路板應(yīng)變測(cè)試指南》中有敘述。SMT發(fā)展起來(lái)，由于其涉及多學(xué)科領(lǐng)域，使其在發(fā)展初期較為緩慢，隨著各學(xué)科領(lǐng)域的協(xié)調(diào)發(fā)展。四川樣片SMT貼片價(jià)格</p><p style="text-indent:25px">絲印:其作用是將焊膏或貼片膠漏印到PCB的焊盤(pán)上，為元器件的焊接做準(zhǔn)備。四川樣片SMT貼片價(jià)格</p><p style="text-indent:25px">隨著電子行業(yè)的不斷進(jìn)步發(fā)展，SMT表面組裝技術(shù)也愈加成熟，設(shè)備和功能也在不斷完善，SMT貼片加工技術(shù)已經(jīng)逐漸取代傳統(tǒng)插裝技術(shù)，成為電子組裝行業(yè)里流行的一種工藝技術(shù)。smt貼片加工技術(shù)為什么會(huì)如此流行呢？一起來(lái)看看它的特點(diǎn)就知道了。一、電子產(chǎn)品體積小，組裝密度高SMT貼片元件的體積*為傳統(tǒng)封裝元件的10%左右，重量也只為傳統(tǒng)插裝元件的10%。SMT技術(shù)通?？墒闺娮赢a(chǎn)品的體積減少40%~60%，使質(zhì)量減少60%~80%，面積和重量都減少。SMT貼片加工組裝元件網(wǎng)格已從1.27mm發(fā)展到目前的0.63mm網(wǎng)格，部分已達(dá)到0.5mm網(wǎng)格。采用通孔安裝技術(shù)，可提高組裝密度。四川樣片SMT貼片價(jià)格</p><p style="text-indent:25px">深圳市潤(rùn)澤五洲電子科技有限公司位于深圳市龍崗區(qū)龍崗街道南聯(lián)瑞記路1號(hào)恒?？萍紙@A棟4樓。公司業(yè)務(wù)涵蓋方案設(shè)計(jì)，電路板加工，PCBA OEM，SMT貼片等，價(jià)格合理，品質(zhì)有保證。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠(chéng)信為本的理念，打造電子元器件良好品牌。在社會(huì)各界的鼎力支持下，持續(xù)創(chuàng)新，不斷鑄造***服務(wù)體驗(yàn)，為客戶成功提供堅(jiān)實(shí)有力的支持。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2483270.html</p></div></div></div></div></div><div id="esuwykb" class="page-right twoColRt"><div id="88e24g7" class="box01 margin10 clearfix"><h3><a 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