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    無縫鋼管張力減徑過程管壁增厚規(guī)律研究

    Study on Rule of Seamless Steel Tube Wall Thickening as Occurring in Stretch-reducing Process

    • 摘要: 根據(jù)無縫鋼管張力減徑過程的變形特點，利用MSC.Marc軟件建立了三維熱力耦合有限元分析模型，對25機架張力減徑機試軋產(chǎn)品進行數(shù)值模擬，不同機架間距的模擬結(jié)果表明利用軟件建立的縮微分析模型建模準確，試驗進一步驗證了模型的可靠性。通過研究管端張力及軋輥工作直徑的變化，了解了管端增厚機理。探討了多種因素對張力的影響，分析了張力形成規(guī)律，研究結(jié)果對今后管端壁厚控制技術(shù)的開發(fā)提供了依據(jù)。

       

      Abstract: According to the deformation characteristics of the seamless steel tube during the stretch-reducing process, a three-dimensional thermo-mechanical coupled finite element analysis model is built up with the MSC.Marc software for numerical simulation of the trial pipe-rolling process of the 25-stand stretch-reducing mill.The results of simulations with different stand spaces indicate that the micro analysis model as set up with the said software is accurate, and its reliability is further verified via relevant testing.And thanks to studying the changes of tube end tension and the working diameter of the roll, the thickening mechanism of the tube end is identified.Furthermore the influence by various factors on the tension is discussed, and the law of tension formation analyzed.The research results provide a basis for future developing the technology for control of tube end wall thickness.

       

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