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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>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>徐州鍋爐設(shè)備封頭加工,封頭</p><p><span>***更新：</span>2021-01-17 07:18:25</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="v8nubip" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">無(wú)錫國(guó)鑫封頭制造有限公司</a></p><p><span>聯(lián)系人：</span>魏峰潔</p><p><span>郵箱: </span>239703@qq.com</p><p><span>電話: </span>13861726550</p><p><span>傳真: </span>0510_83898088</p><p><span>網(wǎng)址: </span>http://www.wxgxft.com</p><p><span>手機(jī): </span>0510-83897088</p><p><span>地址: </span>玉祁街道曙光村</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="ji2tfcz" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="zdfcjlx" class="box"><p><p style="text-indent:25px">橢圓封頭保養(yǎng)技巧：1.封頭水壓試驗(yàn)用水氯離子含量不得大于25mg/L，試驗(yàn)后要及時(shí)吹干。2.不銹鋼酸洗不能用鹽酸等還原酸。3.嚴(yán)格遵守《容規(guī)》規(guī)定的介質(zhì)相容性。4.防止不銹鋼橢圓封頭表面的磕碰劃傷。5.防止與碳素鋼直接接觸，避免鐵離子污染。6.不在露天存放，防雨淋。7.避免強(qiáng)制組焊。結(jié)構(gòu)設(shè)計(jì)要防止拘束應(yīng)力過(guò)大。8.橢圓封頭與筒體組焊后，要及時(shí)清理焊縫、熱影響區(qū)及周?chē)暮冈熘蒎仩t設(shè)備封頭加工、飛濺、污染物，并進(jìn)行PT檢查和表面酸洗，徐州鍋爐設(shè)備封頭加工。無(wú)錫國(guó)鑫封頭制造有限公司，徐州鍋爐設(shè)備封頭加工.使用壽命上，因?yàn)椴讳P鋼封頭具有一定的防腐蝕性，自然在使用壽命上就有一定的延長(zhǎng)。徐州鍋爐設(shè)備封頭加工</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="徐州鍋爐設(shè)備封頭加工,封頭" src="https://tyunfile.71360.com/UploadFile/wxgxft/637393177816365410/2698061.png"></div><p style="text-indent:25px">對(duì)于有些封頭來(lái)說(shuō)，常常會(huì)用到電阻焊接工藝來(lái)進(jìn)行加工處理，不過(guò)在使用這種技術(shù)時(shí)有些常識(shí)是需要大家了解的，下面將具體的為您講解。封頭電阻焊熔核形成時(shí)，始終被塑性環(huán)包圍，熔化金屬與空氣隔絕，冶金過(guò)程簡(jiǎn)單。加熱時(shí)間短，熱量集中，故熱影響區(qū)小，變形與應(yīng)力也小，通常在焊后不必安排校正和熱處理工序。而焊接時(shí)，封頭焊后一般都會(huì)產(chǎn)生變形，如果變形量超過(guò)允許值，就會(huì)影響使用，產(chǎn)生的主要原因是焊件不均勻地局部加熱和冷卻，因?yàn)楹附訒r(shí)，焊件*在局部區(qū)域被加熱到高溫，離焊縫愈近，溫度愈高，膨脹也愈大。因此，當(dāng)封頭和電極已定時(shí)，封頭的電阻取決于它的電阻率。而電阻率是被焊材料的重要性能，所以電阻率高的金屬其導(dǎo)熱性差(如不銹鋼)，電阻率低的金屬其導(dǎo)熱性好(如鋁合金)。總之，點(diǎn)焊不銹鋼時(shí)產(chǎn)熱易而散熱難，點(diǎn)焊鋁合金時(shí)產(chǎn)熱難而散熱易。Q235B封頭生產(chǎn)廠家直銷(xiāo)封頭用來(lái)改善調(diào)節(jié)閥的流量特性。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="徐州鍋爐設(shè)備封頭加工,封頭" src="https://tyunfile.71360.com/UploadFile/wxgxft/637393178907884130/2465970.png"></div><p style="text-indent:25px">球形封頭的特點(diǎn)：球形封頭的受力比橢圓形封頭和碟形封頭好；球形封頭的計(jì)算厚度是相同條件下筒體計(jì)算厚度的一半；（依據(jù)是薄壁殼體的無(wú)力矩理論，大家可以查詢(xún)相關(guān)手冊(cè)或者教科書(shū)，我就不給大家展示了），但是球形封頭的制造減薄量比橢圓形封頭和碟形封頭都要大一些，約15%。球形封頭的應(yīng)用場(chǎng)合：一般用在高壓設(shè)備中。另外，對(duì)于壓力稍微高一點(diǎn)且直徑比較大的塔器，如果用橢圓形封頭，可能計(jì)算出來(lái)的壁厚比較大。這種情況下，比較多人傾向采用球形封頭，目的是降低厚度，從而節(jié)省材料。但是球形封頭的容積比橢圓形封頭的大，塔釜的積液量也就相對(duì)較大，這容易造成工藝介質(zhì)大量積存和浪費(fèi)。所以對(duì)于這種情況，到底選擇球形封頭還是橢圓形封頭，還需要斟酌一下。</p><p style="text-indent:25px">封頭加熱溫度一般不宜超過(guò)420度，當(dāng)式件溫度降至300度以下時(shí)，不適宜繼續(xù)熱成形。鈦封頭應(yīng)該盡量采用熱成形，如成型溫度約為300度－400度。高溫?zé)岢尚螘r(shí)工件加熱溫度可以提高到大約650度，但不應(yīng)該超過(guò)800度。冷成形后的熱校形溫度為100－350度。不銹鋼封頭的厚度愈大，隨著產(chǎn)品形狀變量的增多，強(qiáng)度和抗拉強(qiáng)度增卓著進(jìn)步，硬度值增加，耐塑性下降，產(chǎn)生了卓著的加工硬化現(xiàn)象。不銹鋼封頭對(duì)金屬坯料施加外力，使其產(chǎn)生塑性變形、改變尺寸、外形及改善機(jī)能。旋壓法加工封頭的優(yōu)點(diǎn)：設(shè)備、工裝投資較模壓法少。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="徐州鍋爐設(shè)備封頭加工,封頭" src="https://tyunfile.71360.com/UploadFile/wxgxft/637393178601038405/2065035.png"></div><p style="text-indent:25px">應(yīng)反復(fù)酸洗封頭幾次方能去除。尤其是復(fù)合板封頭在酸洗過(guò)程中，應(yīng)采用有效的保護(hù)措施，防止碳鋼層被腐蝕。酸洗完畢后，要讓其快速風(fēng)干，且內(nèi)部不得有剩余酸液。在封頭類(lèi)產(chǎn)品制造過(guò)程中，必須要嚴(yán)格控制其的生產(chǎn)工藝。其中在下料環(huán)節(jié)，需要在保證產(chǎn)品質(zhì)量的情況下，盡可能節(jié)省材料。比如在1700毫米的封頭下料尺寸為φ2050毫米；通常下料的板材的標(biāo)準(zhǔn)寬度只有1500,2000,2200毫米等。這種情況下我們通常是選用寬度1500毫米的板材進(jìn)行下料。同時(shí)為了保證其的寬度，因而需要下兩塊料。橢圓封頭保養(yǎng)技巧：防止與碳素鋼直接接觸，避免鐵離子污染。徐州鍋爐設(shè)備封頭加工</p><p style="text-indent:25px">封頭的安裝步驟要遵守規(guī)范，避免不能正常使用。徐州鍋爐設(shè)備封頭加工</p><p style="text-indent:25px">封頭廠工程師介紹，封頭厚度的要求都是要在滿(mǎn)足強(qiáng)度的前提下的，由于蝶形封頭越淺，封頭邊緣的壓應(yīng)力值越高，所以我們?cè)谥谱鞣忸^的時(shí)候，一般都會(huì)將封頭長(zhǎng)短軸比值限制在2.6以?xún)?nèi)。對(duì)于對(duì)一些大直徑薄壁的橢圓形封頭，還要考慮他的剛度要求。碟形封頭，這是一種由球面部分、直邊段以及過(guò)渡區(qū)三部分組成的封頭。碟形封頭邊緣應(yīng)力的大小是與過(guò)渡區(qū)半徑與球面半徑的比值有關(guān)系的，壓力罐封頭用于閉式水循環(huán)系統(tǒng)中，起到了平衡水量及壓力的作用，避免安全閥頻繁開(kāi)啟和自動(dòng)補(bǔ)水閥頻繁補(bǔ)水。膨脹罐起到容納膨脹水的作用外，還能起到補(bǔ)水箱的作用。徐州鍋爐設(shè)備封頭加工</p><p style="text-indent:25px">無(wú)錫國(guó)鑫封頭制造有限公司致力于機(jī)械及行業(yè)設(shè)備，是一家生產(chǎn)型公司。公司業(yè)務(wù)涵蓋封頭，不銹鋼封頭，碳鋼封頭，鋁封頭等，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(jìng)爭(zhēng)力，努力學(xué)習(xí)行業(yè)知識(shí)，遵守行業(yè)規(guī)范，植根于機(jī)械及行業(yè)設(shè)備行業(yè)的發(fā)展。國(guó)鑫封頭憑借創(chuàng)新的產(chǎn)品、專(zhuān)業(yè)的服務(wù)、眾多的成功案例積累起來(lái)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(lái)源地址: http://www.cdcfah.com/cp/2884911.html</p></div></div></div></div></div><div id="j3a2vnp" class="page-right twoColRt"><div id="otqikmt" class="box01 margin10 clearfix"><h3><a 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