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normal;"><span style="font-size: 18px;"><strong> 18100963032</strong></span></p><p style="white-space: normal;"><span style="font-size: 18px;"><strong>網址：</strong></span><a href="http://www.dginstrument.com/" _src="http://www.dginstrument.com" style="font-size: 18px;"><strong>www.dginstrument.com</strong></a></p><p style="white-space: normal;"><span style="font-size: 18px;"><strong>地址：?？谑心虾４蟮琅c長彤路交叉路口</strong></span></p><p><br/></p> </div> </div> </div> <div class="page-message-img"> <a href="http://www.dginstrument.com/inquiry/"><img src="http://www.dginstrument.com/data/upload/201908/20190819160028_346.png" alt=""></a> </div> </div> </div> <div class="page-wrap-right"> <div class="xypg-right-content">  <div class="xypg-news-detail"> <h1 class="xypg-detail-title">淺談彎管拉伸和彎曲方法</h1> <div class="xypg-detail-info-bar"> <div class="detail-info-time"><i class="icon-font icon-shijian"></i>2019-12-20 12:15:18</div> <div class="detail-info-numbers"><i class="icon-font icon-chakan"></i><script src="http://www.dginstrument.com/source/include/browse.php?model=news&id=430"></script>次</div> </div> <div class="xypg-detail-con"><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">按彎曲方式可分為輥彎、壓彎、推彎和纏繞彎；按模具是否用于彎曲，可分為模彎和模彎；按芯軸是否用于彎曲，可分為芯軸彎曲和芯軸自由彎曲；按</span>G<span style="font-family:宋體">彎曲是否采用加熱，可分為冷彎和熱彎。近年來，出現了零半徑彎曲、中頻感應彎曲、熱應力彎曲和激光成形彎曲等新的彎曲工藝。</span></span></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">滾壓彎曲是一種三輥彎曲管道的方法。滾輪</span>3<span style="font-family:宋體">是驅動輪，另外兩個是驅動輪。軋制方法和工作原理與金屬板軋制基本相同，但用于軋管的輥具有與鋼坯截面形狀相吻合的工作面。彎曲時，通過改變主輥和從輥的間距，可以實現各種曲率半徑的彎曲。拉伸彎曲機說這種方法特別適用于彎曲環形或螺旋管配件。但是，輥彎對彎曲半徑有一定的要求。它只適用于曲率半徑較大的厚壁管道，但對于小半徑彎曲則顯得力不從心。</span></span></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">?？?/span></span><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">彎管拉彎</span></span></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">彎曲是Z早用于管道彎曲的技術。它用液壓機上的模具彎曲管坯。</span></span><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">海南</span></span><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">拉彎廠彎曲加工具有模具調整簡單、生產效率高等優點，在生產中得到了廣泛的應用。它通常用于彎管管件或彎管的直段。拉伸彎曲過程需要對拉伸力、速度和位移等工作參數進行控制。拉伸彎曲是一個復雜的塑性變形過程，羊毛受到彎曲力矩和軸向拉伸。不同的加載順序對羊毛的變形特性和應力分布有不同的影響。</span></span></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">理論上，在彎曲先彎曲后拉伸的工藝方案中，只需少量的輔助拉伸，即可達到顯著的效果，更大限度地減少零件的回彈。但事實上，當羊毛彎曲并與模具粘合時，由于摩擦很難將張力傳遞到羊毛的各個部分，而且羊毛的外層纖維很容易斷裂，效果不好。</span></span></p><p style="text-indent: 28px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">雖然可以得到羊毛彎曲前的平均塑性張力，</span></span><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">海南</span></span><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">拉彎廠但不能有效地防止羊毛彎曲后的異常應力分布。卸料后回彈大。這個問題可以通過彎曲后的輔助拉拔來解決。因此，現場生產大多采用</span>“先拉后彎，Z后填拉”的復合方案。理論上，所有纖維在彎曲后都會均勻伸長，應力會沿截面高度重新分布。由于消除了異常應力狀態的影響，減小了內力矩，工件能更好地保持所需的彎曲形狀。</span></p><p style="text-align: center;"><img src="/data/upload/201912/1576812195142761.jpg" title="?？诶瓘潖S家.jpg" alt="?？诶瓘潖S家.jpg" width="800" height="800" border="0" vspace="0" style="width: 800px; height: 800px;"/></p></div> <div class="xypg-detail-tags"> <div class="tags-title"> <h3>標簽</h3> <div class="baidu-share">  <div class="bdsharebuttonbox"> <a href="#" class="bds_more" data-cmd="more"></a> <a href="#" class="bds_tsina" data-cmd="tsina" title="分享到新浪微博"></a> <a href="#" class="bds_weixin" data-cmd="weixin" title="分享到微信"></a> <a href="#" class="bds_sqq" data-cmd="sqq" title="分享到QQ好友"></a> <a href="#" class="bds_isohu" data-cmd="isohu" title="分享到我的搜狐"></a> <a href="#" class="bds_tqq" data-cmd="tqq" title="分享到騰訊微博"></a> <a href="#" class="bds_fbook" data-cmd="fbook" title="分享到Facebook"></a> </div> 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