揚州負(fù)壓V法鑄造原理服務(wù)至上江陰華天科技供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="鑄型強度不夠或者不均勻，在有些具有大平面特點的鑄件生產(chǎn)上，不能很好的減小或防止鑄件在冷卻過程中的變形。有時候常常為了落砂的簡易性，對于下箱往往不加箱檔，以利于鑄件直接從砂箱脫出。這是不合理的。上下箱必須都設(shè)計抽氣箱檔，才能有效保障鑄型強度的"><meta name="keywords" content="揚州負(fù)壓V法鑄造原理,V法鑄造"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" content="no-transform" /> <meta 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13:04:17</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="iheqfmo" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">江陰華天科技開發(fā)有限公司</a></p><p><span>聯(lián)系人：</span>謝經(jīng)理</p><p><span>郵箱: </span>273371292@qq.com</p><p><span>電話: </span>13961688156</p><p><span>傳真: </span>0510_</p><p><span>網(wǎng)址: </span>http://www.jy-dannier.com</p><p><span>手機: </span>0510-86273026</p><p><span>地址: </span>月城鎮(zhèn)月翔路17號</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="bqiahjl" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="mwoqskh" class="box"><p><p style="text-indent:25px">鑄型強度不夠或者不均勻，在有些具有大平面特點的鑄件生產(chǎn)上，不能很好的減小或防止鑄件在冷卻過程中的變形。有時候常常為了落砂的簡易性，對于下箱往往不加箱檔，以利于鑄件直接從砂箱脫出。這是不合理的。上下箱必須都設(shè)計抽氣箱檔，才能有效保障鑄型強度的均勻性及上下鑄型強度的對等性。圖9、圖10為某廠生產(chǎn)某種型號的鐵路側(cè)架鑄件的上下箱結(jié)構(gòu)圖。另外值得一提的是，砂箱結(jié)構(gòu)設(shè)計合理，對于同一套真空系統(tǒng)來講，揚州負(fù)壓V法鑄造原理，可能同時允許接入的砂箱數(shù)量就會增加，揚州負(fù)壓V法鑄造原理，揚州負(fù)壓V法鑄造原理，意味著真空系統(tǒng)的利用效率明顯增強。除塵濾氣罐采用介質(zhì)分離，抽吸進(jìn)來的氣體與水混合。揚州負(fù)壓V法鑄造原理</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="揚州負(fù)壓V法鑄造原理,V法鑄造" src="https://tyunfile.71360.com/UploadFile/Jyhuatian/637293889931113282/8104857.png"></div><p style="text-indent:25px">V法鑄造是真空密封造型或負(fù)壓造型鑄造工藝的簡稱，其原理是利用塑料薄膜覆模造型并密封砂箱，依靠真空泵抽出型內(nèi)空氣，造成型內(nèi)箱外壓力差，使干砂緊實，形成所需型腔。其比較大優(yōu)勢是型砂不使用粘結(jié)劑，干砂回用率高達(dá)95%以上，不僅節(jié)能環(huán)保、落砂簡便、改善勞動條件，而且鑄件表面品質(zhì)和尺寸精度**提高。V法鑄造是日本長野縣工業(yè)試驗所和秋田株式會社于1971年的發(fā)明專利。V法鑄造至今經(jīng)過了38年的發(fā)展，同消失模鑄造一樣，作為第3代造型方法即物理硬化方法，在世界上尤其是在中國獲得了長足的發(fā)展。揚州負(fù)壓V法鑄造原理根據(jù)涂料不同骨料組配的特性，合理地選擇V法鑄造用型砂。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="揚州負(fù)壓V法鑄造原理,V法鑄造" src="https://tyunfile.71360.com/UploadFile/Jyhuatian/637293889693593750/34083.png"></div><p style="text-indent:25px">覆膜架帶動EVA薄膜下降過程中與空氣產(chǎn)生的對流運動必然形成對整張薄膜的浮力，進(jìn)而造成薄膜的向上運動，并使薄膜自身產(chǎn)生一定的張力，即薄膜內(nèi)部區(qū)域?qū)ν獠繀^(qū)域的拉力作用（見圖1）。根據(jù)空氣動力學(xué)原理，對流速度越快，也就是覆膜架下降的速度越快，這種浮力越大，整張薄膜向上浮動的速度也就越大，同時，對薄膜的拉伸作用也越明顯。這種浮力不但會使EVA薄膜容易上浮并接觸到紅熱的電熱絲或者電熱管燙破，也有可能使熱態(tài)強度很低的薄膜在拉力作用下直接拉裂；采用數(shù)學(xué)模型去定量的給出覆膜框下行速度的參考值是很困難的，因為柔性極強的薄膜在覆膜框帶動下運動的受力狀態(tài)極其復(fù)雜，直接的生產(chǎn)調(diào)試控制速度過快是比較現(xiàn)實的辦法。值得注意的是，覆膜架下行過程中加速度太大會造成EVA薄膜強烈顫動，這往往源于氣動控制裝置穩(wěn)定性太差、速度變化過分強烈。這種不必要的震蕩對于熱態(tài)下強度很低的薄膜也是非常危險的。圖2為某生產(chǎn)現(xiàn)場因為覆膜框震蕩造成EVA薄膜破裂的現(xiàn)象。</p><p style="text-indent:25px">美國耐磨狼公司，作為北美地區(qū)礦山耐磨行業(yè)耐磨鑄件的主要供應(yīng)商，采用V法鑄造生產(chǎn)線生產(chǎn)耐磨鑄件，獲得了優(yōu)異的產(chǎn)品質(zhì)量，并將V法鑄造工藝發(fā)展成為了耐磨件鑄造的主流工藝。該公司從1979年開始接觸V法鑄造工藝，共有三條V法鑄造生產(chǎn)線，產(chǎn)品重量在225kg-4500kg之間，單條生產(chǎn)線生產(chǎn)效率比較高達(dá)15箱/小時。該公司同時擁有自硬砂鑄造工藝，針對不同要求產(chǎn)品進(jìn)行不同工藝的搭配生產(chǎn)，其中V法鑄造生產(chǎn)了超過75%的鑄件。該公司認(rèn)為V法鑄造主要有如下優(yōu)勢：鑄件的一致性好，客戶對鑄件尤其是大型鑄件一致性的要求更高；環(huán)境友好，生產(chǎn)過程無化學(xué)添加劑，作業(yè)環(huán)境優(yōu)化，無需混砂；更好的鑄件質(zhì)量，鑄件尺寸精度非常出色，鑄件表面質(zhì)量更好；無拔模斜度。鑄型都必須保持一定的真空度以固定松散的干砂，確保鑄型有足夠的強度和剛度澆注時防止鑄型坍塌和鑄件變形。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="揚州負(fù)壓V法鑄造原理,V法鑄造" src="https://tyunfile.71360.com/UploadFile/Jyhuatian/637293889636621094/6553892.png"></div><p style="text-indent:25px">對于一些多筋板或具有相當(dāng)高垂直面的鑄件而言，這種擦傷鑄型的現(xiàn)象尤為普遍。而個別自動化程度很高的機械手，運轉(zhuǎn)穩(wěn)定性差，末端柔性不足，在運轉(zhuǎn)過程中產(chǎn)生震蕩或者難以急停，甚至不能保證**起碼的定位及真空對接精度，直接影響鑄型在起模翻轉(zhuǎn)等過程中的安全性。隨著V法成套裝備生產(chǎn)線自動化和機械化水平的提升，對起模機構(gòu)的使用要求越來越高。這就需要我們在這些關(guān)鍵的造型設(shè)備方面，提高設(shè)計，制造，安裝的精度和可靠性，以充分保障造型質(zhì)量和鑄型安全。真空泵水環(huán)中的水溫度不能高于40℃，以便冷卻抽入的熱氣體。國內(nèi)一般選用2BE﹑SK及機械泵等。揚州負(fù)壓V法鑄造原理</p><p style="text-indent:25px">再生的舊砂成套設(shè)備應(yīng)包括落砂，輸送、分選、過篩及砂冷卻系統(tǒng)。揚州負(fù)壓V法鑄造原理</p><p> 砂芯的設(shè)計 </p> <p> 砂芯的設(shè)計主要是排氣問題，在砂芯的分芯面上開挖排氣和集氣通道，在這些通道上扎制砂芯內(nèi)部排氣孔，再將這些排氣和集氣通道進(jìn)行匯集，通過匯集點向鑄型外排出，使得砂芯內(nèi)氣體有效排出型外，避免氣孔和鑄件內(nèi)壁氧化等缺點。 </p> <p> <br /> </p> <p> <br /> </p> <p> 5.澆注速度、真空保持時間的設(shè)計 </p> <p> 由于V法鑄造的真空特點，澆注過程中，外型和坭芯均處于真空狀態(tài)，其澆注充型的能力遠(yuǎn)大于其它鑄造工藝。鑒于V法鑄造冷卻緩慢和真空特性，澆注溫度不宜偏高，目的是為了避免或減弱收縮類缺點。 </p> <p> 在通氣和排氣系統(tǒng)適當(dāng)?shù)那闆r下，在澆注末期透氣孔不出現(xiàn)“嗆火”狀態(tài)下可以提高澆注速度，滿足產(chǎn)品質(zhì)量前提下，可以在平常澆注速度的基礎(chǔ)上提高20%～30%;澆注終了的點澆等與其它工藝相同。揚州負(fù)壓V法鑄造原理</p><p style="text-indent:25px">江陰華天科技開發(fā)有限公司致力于機械及行業(yè)設(shè)備，是一家生產(chǎn)型公司。公司業(yè)務(wù)涵蓋氣力輸送，V法鑄造，輸送機械，環(huán)保設(shè)備等，價格合理，品質(zhì)有保證。公司將不斷增強企業(yè)重點競爭力，努力學(xué)習(xí)行業(yè)知識，遵守行業(yè)規(guī)范，植根于機械及行業(yè)設(shè)備行業(yè)的發(fā)展。江陰華天科技秉承“客戶為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實”的經(jīng)營理念，全力打造公司的重點競爭力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1305043.html</p></div></div></div></div></div><div id="zoqnfwt" class="page-right twoColRt"><div id="jylifro" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="ujgd8zt" 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配件哪家強信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="fur7o3u" class="recomPic likePro"><a 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