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class="proBig"><div id="baixprq" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/wxgxft/637393178521136554/4515182.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="utlsels" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/wxgxft/637393178521136554/4515182.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="m8gi24i" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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>徐州橢圓封頭生產(chǎn)廠家電話,封頭</p><p><span>***更新：</span>2020-11-27 06:21:21</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="p7jqs88" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">無錫國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="fuwtvxz" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="oiaczln" class="box"><p><p style="text-indent:25px">壓力容器用封頭有哪些？一般來說壓力容器用封頭主要是按照封頭的形狀來進(jìn)行區(qū)分的，比較常見的有球形封頭、圓形封頭、橢圓形封頭、蝶形封頭。這些封頭根據(jù)需求不同，會進(jìn)行不同的選擇，徐州橢圓封頭生產(chǎn)廠家電話。這主要是因為幾何形狀和尺寸的改變，就會影響內(nèi)壓殼受壓力的變化，如果說應(yīng)力不能在可控范圍內(nèi)的話，就會影響容器的整體承載能力，甚至有的部位就會成為設(shè)備的破壞源，所以多關(guān)注封頭的要求還是比較重要的。除了形狀之外，由于封頭要時時刻刻受到壓力，所以做工上的要求也比較高，尤其是在壓力容器封頭上的接管，徐州橢圓封頭生產(chǎn)廠家電話，它的結(jié)構(gòu)也是非常復(fù)雜的，開孔的大小，徐州橢圓封頭生產(chǎn)廠家電話、位置以及受力的情況經(jīng)常會超出常規(guī)的設(shè)計范圍，所以要引入具體的分析設(shè)計，這樣才能保證平安的使用。封頭閥桿與填料間的摩擦力較大，此時用封頭可克服時滯。徐州橢圓封頭生產(chǎn)廠家電話</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="徐州橢圓封頭生產(chǎn)廠家電話,封頭" src="https://tyunfile.71360.com/UploadFile/wxgxft/637393178521136554/4515182.png"></div><p style="text-indent:25px">封頭的作用在于對金屬板材施加外力，讓金屬板材發(fā)生變形從而使尺寸和形狀發(fā)生改變，性能也能得到改善。比較合適加工或制造機(jī)械類工件。封頭的鍛造分比較多種類型，特點(diǎn)也非常多，下面我就給大家選取兩種具有象征性的介紹一下：在溫度超過400℃高達(dá)800℃的時候，封頭變形的阻力就會急速變小，變形也就得到改善，按照不同地域的溫度，鍛件的質(zhì)量和鍛造要求的不同，可以分成冷鍛，熱鍛和溫鍛。1、在冷鍛的時候，鍛件的尺寸不會有太大的改變，封頭在700℃以下進(jìn)行鍛造，表面不會出現(xiàn)脫碳的現(xiàn)象，所以說，只要變形是在成形的范圍之內(nèi)，冷鍛是能夠鍛造出表面光滑尺寸精確的工件。2、在熱鍛的時候，變形阻力和變形能力都非常小，適合鍛造形狀復(fù)雜的大鍛件。南通分散設(shè)備封頭制作廠封頭沖壓成形模具間隙不能過小。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="徐州橢圓封頭生產(chǎn)廠家電話,封頭" src="https://tyunfile.71360.com/UploadFile/wxgxft/637393178506859299/3162147.png"></div><p style="text-indent:25px">半球封頭是由一塊園形坯料，經(jīng)圧制而成其為半球形。在低溫鍛造時，鍛件的尺寸變化比較小。在700℃以下鍛造，氧化皮形成少，而且表面無脫碳現(xiàn)象。因此，只要變形能在成形能范圍內(nèi)，冷鍛容易得到比較好的尺精度和表面光潔度。只要控制好溫度和潤滑冷卻，700℃以下的溫鍛也可以獲得比較好的精度。熱鍛時，由于變形能和變形阻力都比較小，可以鍛造形狀復(fù)雜的大鍛件。要得到高尺寸精度的鍛件，可在900-1000℃溫度域內(nèi)用熱鍛加工。半球封頭在圧力成型時，其坯料中間部份的材料會被拉伸，而邊緣部份則被圧縮，這樣要有一個平穏的變形過程，加熱坯料就會使這一過程變得平穩(wěn)，采用“油圧”或“水圧”這樣比較慢的加圧方式會使其變形過程更加平穩(wěn)。而“沖圧”過程大快了，除了板厚適中的小型半球封頭還有個別用沖圧工藝外，其余全部是坯料加熱后采用油圧或水圧成型工藝。以其形狀區(qū)別于橢園封頭與碟形平板封頭。除了半球封頭之外，還有其他類型的封頭，根據(jù)類型差異，它們的成型工藝也會有區(qū)別。</p><p style="text-indent:25px">封頭是石油化工、原子能到食品制藥諸多行業(yè)壓力容器設(shè)備中不可缺少的重要部件。不同時期封頭價格都會有所浮動，而封頭標(biāo)準(zhǔn)沒有經(jīng)常變動，我國現(xiàn)有的封頭標(biāo)準(zhǔn)，是按結(jié)構(gòu)型式（橢圓形、碟形、錐形）、成形方式（沖壓、旋壓）的不同，而分別制訂的，這不*造成不同標(biāo)準(zhǔn)封頭質(zhì)量要求不完全一致的不合理現(xiàn)象，同時也給標(biāo)準(zhǔn)封頭的選用、標(biāo)準(zhǔn)的修訂帶來某些困難。一、以往的封頭標(biāo)準(zhǔn)都是*與GB150《鋼制壓力容器》配套的，即只考慮了按規(guī)則設(shè)計的封頭的制造、檢驗與驗收要求，而我國早在1995年就完成GB150與JB4732了壓力容器基礎(chǔ)標(biāo)準(zhǔn)的雙軌制（與《鋼制壓力容器分析設(shè)計標(biāo)準(zhǔn)》），缺少與分析設(shè)計相配套的封頭標(biāo)準(zhǔn)，不能不說是我國壓力容器標(biāo)準(zhǔn)化工作的一大缺憾。二、GB150屬強(qiáng)制性標(biāo)準(zhǔn)，而根據(jù)GB150編制并與之配套的封頭標(biāo)準(zhǔn)卻是指導(dǎo)（推薦）性的，這顯然是不合理的，也難以保證封頭這一重要受壓元件的質(zhì)量。球形的封頭為半個球殼。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="徐州橢圓封頭生產(chǎn)廠家電話,封頭" src="https://tyunfile.71360.com/UploadFile/wxgxft/637393178052369837/6358953.png"></div><p style="text-indent:25px">不銹鋼封頭的熱處理：一方面鋼在熱處理過程中由于組織的變化即奧氏體向馬氏體轉(zhuǎn)變時，因比容的增大會伴隨工件體積的膨脹，工件各部位先后相變，造成體積長大不一致而產(chǎn)生組織應(yīng)力。不銹鋼封頭組織應(yīng)力變化的較終結(jié)果是表層受拉應(yīng)力，心部受壓應(yīng)力，恰好與熱應(yīng)力相反。組織應(yīng)力的大小與工件在馬氏體相變區(qū)的冷卻速度，形狀，材料的化學(xué)成分等因素有關(guān)。只不過熱應(yīng)力在組織轉(zhuǎn)變以前就已經(jīng)產(chǎn)生了不銹鋼封頭，而組織應(yīng)力則是在組織轉(zhuǎn)變過程中產(chǎn)生的，在整個冷卻過程中，熱應(yīng)力與組織應(yīng)力綜合作用的結(jié)果，就是工件中實際存在的應(yīng)力。這兩種應(yīng)力綜合作用的結(jié)果是十分復(fù)雜的，受著許多因素的影響，如成分、形狀、熱處理工藝等。就其發(fā)展過程來說只有兩種類型，即熱應(yīng)力和組織應(yīng)力，作用方向相反時二者抵消，作用方向相同時二者相互迭加。不管是相互抵消還是相互迭加，兩個應(yīng)力應(yīng)有一個占主導(dǎo)因素，熱應(yīng)力占主導(dǎo)地位時的作用結(jié)果是工件心部受拉，表面受壓。組織應(yīng)力占主導(dǎo)地位時的作用結(jié)果是工件心部受壓表面受拉。封頭用來改善調(diào)節(jié)閥的流量特性。南通雙氧水設(shè)備封頭廠商</p><p style="text-indent:25px">球形封頭的計算厚度是相同條件下筒體計算厚度的一半。徐州橢圓封頭生產(chǎn)廠家電話</p><p style="text-indent:25px">根據(jù)不銹鋼封頭尺寸制作一較封頭開口端直徑小的料圈，淬火時用料圈從封頭底側(cè)套起，用單臂吊托住料圈將封頭浸入水中。也就是都可能使不銹鋼封頭的外表面獲得較好的冷卻效果，但是封頭的內(nèi)表面由于封頭的形狀，較容易存水，不能及時將水排走，使熱量部分儲存，使本來就冷卻較慢的內(nèi)側(cè)的冷卻能力進(jìn)一步降低，影響了內(nèi)表面尤其是底面的冷卻效果。針對于不同的使用要求，需要對封頭進(jìn)行不同的結(jié)構(gòu)設(shè)計。因而目前市面上的封頭產(chǎn)品包括有不同的形狀。徐州橢圓封頭生產(chǎn)廠家電話</p><p style="text-indent:25px">無錫國鑫封頭制造有限公司致力于機(jī)械及行業(yè)設(shè)備，以科技創(chuàng)新實現(xiàn)***管理的追求。國鑫封頭作為主營封頭、橢圓封頭、碟形封頭、球冠封頭、半球封頭、錐形封頭、爐臺殼體、平底封頭、攪拌車封頭、**車封頭、SF/SS 雙層油罐封頭、方圓封頭、鴨蛋封頭及雙相鋼、鋁鎂合金、鈦合金等特種材料封頭。主要運(yùn)用于壓力容器設(shè)備、制藥設(shè)備、環(huán)保設(shè)備、罐體運(yùn)輸車輛等行業(yè)的企業(yè)之一，為客戶提供良好的封頭，不銹鋼封頭，碳鋼封頭，鋁封頭。國鑫封頭致力于把技術(shù)上的創(chuàng)新展現(xiàn)成對用戶產(chǎn)品上的貼心，為用戶帶來良好體驗。國鑫封頭始終關(guān)注機(jī)械及行業(yè)設(shè)備市場，以敏銳的市場洞察力，實現(xiàn)與客戶的成長共贏。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2164197.html</p></div></div></div></div></div><div id="8xzr8ab" class="page-right twoColRt"><div id="jyvsubn" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="et2wryk" 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