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class="pic"><img src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265671406250/559850.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="lamonub" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265671406250/559850.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="2tcovmo" 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>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>浙江特種焊絲價(jià)格</p><p><span>***更新：</span>2020-06-21 16:22:56</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="mbiu7fb" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">簡敏精密五金制造(上海)有限公司</a></p><p><span>聯(lián)系人：</span>龔先生</p><p><span>郵箱: </span></p><p><span>電話: </span>13818473006</p><p><span>傳真: </span>021_69726282</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>021-69726282</p><p><span>地址: </span>顧北東路365號(hào)C區(qū)1101</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="apbdpbc" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="8t2xo7d" class="box"><p><p> 對(duì)本實(shí)用新型作進(jìn)一步說明：結(jié)合圖1—圖4所示，一種防腐罐用焊條自動(dòng)生產(chǎn)設(shè)備，由塑料擠出機(jī)a、水冷循環(huán)系統(tǒng)b、自動(dòng)切斷機(jī)構(gòu)c、焊條接斗d組成，四者從前到后依次布置。水冷循環(huán)系統(tǒng)b，主要由機(jī)架1、水槽2、焊條導(dǎo)向桿3，浙江特種焊絲價(jià)格、水龍頭4、水管5和水泵組成。機(jī)架1上方設(shè)置有長條形的水槽2，水槽2由水平隔板分割成上層槽2a和下層槽，浙江特種焊絲價(jià)格，上層槽2a呈敞開狀態(tài)，下層槽為封閉狀態(tài)。在水槽2的兩端設(shè)置有連通槽2c，浙江特種焊絲價(jià)格。上層槽2a的前壁、后壁上對(duì)應(yīng)開設(shè)有焊條過孔2b，焊條過孔的直徑為等邊三角形焊條19邊長的兩倍到三倍之間，供從塑料擠出機(jī)出來的焊條通過，同時(shí)還能確保上層槽2a的冷卻水由焊條過孔2b流入連通槽2c。限定焊條過孔的直徑與等邊三角形焊條邊長之間的關(guān)系，既能確保對(duì)焊條位置的限定，又能確保水流量。在上層槽2a內(nèi)前后間隔安裝有兩根水平設(shè)置的焊條導(dǎo)向桿3，但不限于兩根，對(duì)通過的焊條進(jìn)行導(dǎo)向。焊條過孔2b、焊條導(dǎo)向桿3在高度上齊平，確保焊條在水冷過程中水平地順暢通過，防止焊條彎曲變形。上層槽2a的冷卻水能經(jīng)焊條過孔2b流入連通槽2c，并**終流進(jìn)下層槽，再由水泵將下層槽的水泵入與水龍頭4相連的水管5。水龍頭4位于上層槽2a的前壁上方并正對(duì)焊條過孔2b。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江特種焊絲價(jià)格" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265671406250/559850.png"></div><p> 焊條烘干的目的焊條在儲(chǔ)存、運(yùn)輸期間藥皮會(huì)吸潮，使藥皮中的水分增加。焊條使用前進(jìn)行烘干的作用就是降低藥此中的含水量，其目的是：1）減少焊接過程中的飛濺，使焊接電弧能夠穩(wěn)定地燃燒。2）防止在焊縫中產(chǎn)生氣孔。3）防止產(chǎn)生在焊接某些低合金鋼時(shí)由氫引起的延遲裂紋。根據(jù)JB3223—83《焊條質(zhì)量管理規(guī)程》的規(guī)定，酸性焊條烘干的溫度為75～150℃時(shí)間為1～2h。酸性焊條由于對(duì)水分產(chǎn)生氣孔的敏感性不大，所以烘干溫度相對(duì)要低一些。堿性焊條的烘干溫度350--400℃，時(shí)間1--2小時(shí)，烘干后放在100--150℃的保溫箱內(nèi)，隨用隨取。JB4709中有推薦保溫時(shí)間和溫度(非強(qiáng)制性標(biāo)準(zhǔn)),不過實(shí)際使用時(shí)比較好參考焊條質(zhì)保書中的溫度及時(shí)間要求！堿性焊條過高的烘干溫度也是不合適的：一是浪費(fèi)能源；其次是當(dāng)烘干溫度超過500℃時(shí)，藥皮中的某些成分（如CaCO3）就要發(fā)生分解，起不到應(yīng)有的保護(hù)作用。焊條烘干時(shí)的注意事項(xiàng)焊條烘干時(shí)應(yīng)注意如下事項(xiàng)：1）低氫型焊條在常溫下超過4h時(shí)，應(yīng)重新烘干。重復(fù)烘干次數(shù)不宜超過3次。2）烘干焊條時(shí)，禁止將焊條突然放進(jìn)高溫爐內(nèi)，或從高溫爐中突然取出冷卻，防止焊條因驟冷驟熱而發(fā)生的藥皮開裂現(xiàn)象。3）焊條烘干時(shí)應(yīng)作記錄。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江特種焊絲價(jià)格" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265685263672/7237309.png"></div><p> 電感線圈的感抗電壓降使電焊機(jī)獲得較低的工作電壓，這是電焊機(jī)具有陡降外特性的原因。引弧時(shí)，電焊機(jī)能供給較高的電壓和較小的電流，當(dāng)電弧穩(wěn)定燃燒時(shí)，電流增大，而電壓急劇降低；當(dāng)焊條與工件短路時(shí)，也限制了短路電流。焊接電流調(diào)節(jié)分為粗調(diào)、細(xì)調(diào)兩檔。電流的細(xì)調(diào)靠移動(dòng)鐵芯4改變變壓器的漏磁來實(shí)現(xiàn)。向外移動(dòng)鐵芯，磁阻增大，漏磁減小，則電流增大，反之，則電流減少。電流的粗調(diào)靠改變次級(jí)繞組的匝數(shù)來實(shí)現(xiàn)。該電弧焊機(jī)的工作條件為應(yīng)在海拔不超過1000m，周圍空氣溫度不超過+40℃、空氣相對(duì)濕度不超過85％等條件下使用，不應(yīng)在有害工業(yè)氣體、水蒸汽、易燃、多灰塵的場合下工作。二、直流弧焊機(jī)(一)結(jié)構(gòu)由于整流或直流弧焊機(jī)與直流弧焊發(fā)電機(jī)比較，因沒有機(jī)械旋轉(zhuǎn)部分，具有噪音小，空載損耗小、效率高、成本低和制造維護(hù)簡單等優(yōu)點(diǎn)。因此，有取代直流弧焊發(fā)電機(jī)的趨勢，在這里只介紹整流式直流弧焊機(jī)。整流式直流弧焊機(jī)常用型號(hào)如ZXG—300、ZXG—400等。硅整流電弧焊機(jī)是利用硅半導(dǎo)體整流元件(二極管)將交流電變?yōu)橹绷麟娮鳛楹附与娫?。圖3—10為硅整流電弧焊機(jī)的結(jié)構(gòu)示意圖。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/339971.html</p></div></div></div></div></div><div id="pnzl7bx" class="page-right twoColRt"><div id="lu3p87b" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="dc8xei8" 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