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news-head-p">彎管設(shè)備加工廠家順應(yīng)經(jīng)濟形勢實行改革</p> <h3> <img src="/uploads/180330/1-1P330102135W2-lp.jpg" style="margin-right: 10px; float: left; width: 180px; height: 180px;" /></h3> <div> <h3> <span style="font-size:36px;"><a href="http://">彎管設(shè)備</a>加工廠家順應(yīng)經(jīng)濟形勢實行改革</span></h3> </div> <div> </div> <div> <span style="font-size:20px;">我們在很多機械制造上要用到彎管加工的技術(shù)，那么現(xiàn)在對其是否又有了解呢？下面我們就先從一些方面來簡單了解一下。</span></div> <div> </div> <div> <span style="font-size:20px;">大口徑冷彎管是長輸管道施工中常用的管件，是根據(jù)管線實際走向，實測所需彎管角度，利用垂直液壓彎管機現(xiàn)場制作而成的。進(jìn)人21世紀(jì)，我國長輸管道工程建設(shè)發(fā)展迅速，而且我國地貌復(fù)雜多樣，管道沿線山地丘陵多、平原少，冷彎管的需求量相當(dāng)大，但由于許多參加施工的單位缺少生產(chǎn)冷彎管的經(jīng)驗，對如何制作高質(zhì)量的冷彎管，尚處于摸索階段。作為冷彎管機生產(chǎn)廠家，我們在彎管機研制、試驗及應(yīng)用過程中，就如何保證冷彎管彎制質(zhì)量進(jìn)行了深人的研究和測試，對冷彎管常見缺陷進(jìn)行了分析并提出了控制措施，供大家借鑒。</span></div> <div> </div> <div> <span style="font-size:20px;">每根冷彎管都是通過若干次彎制完成的。將鋼管置于彎管機上，<a href="http://">彎管機</a>對鋼管施以彎曲力矩，使鋼管局部發(fā)生適量變形，形成一定的角度，達(dá)到彎制目的，其基本過程是：后端夾具夾緊鋼管，然后通過前端下模主油缸的支點向上運動，使鋼管沿上模曲線中部彎曲變形，直到彎制成型。在杭州彎管加工過程中鋼管的變形發(fā)生在上模上，上模起胎具的作用，其曲線根據(jù)不同規(guī)格、不同材質(zhì)的鋼管塑性變形的臨界值確定。盧以不同的鋼管對應(yīng)不同的上模。</span></div> <div> </div> <div> <span style="font-size:20px;">根據(jù)產(chǎn)生褶皺原因，我們從兩個方面控制：一方面是在彎制過程中內(nèi)胎不能放置在靠近前夾具一側(cè)，而應(yīng)放在靠近下模彎曲缸一側(cè)，且內(nèi)胎后部超出上胎后部150mm左右。同時在進(jìn)行前3次彎曲時，彎曲缸的升程不宜過大，在后步工序中彎曲缸升程應(yīng)逐漸遞增，直到鋼管接觸到上胎弧線最高點為止，這樣可以使鋼管在彎曲過程中能平緩過渡，保證鋼管不發(fā)生失穩(wěn)變形。另一方面是在彎制鋼管前調(diào)整內(nèi)胎，試彎第一根管時，內(nèi)胎必須處于自鎖位置，撐住鋼管內(nèi)壁后方可進(jìn)行彎制。通過采取以上措施，就可以保證鋼管不出現(xiàn)褶皺。</span></div> <div> </div> <div> <span 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