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Development of cross roll edge-bend method for electric resistance welded pipe forming

机译：电阻焊管成型的交叉辊边缘弯曲方法的发展

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摘要

A method was proposed and investigated for improving the commonality of rolls being used in a variety of outside diameters and wall thicknesses of Electric Resistance Welded pipes, together with improving their formed edge profile and quality, where pipes having a broad wall thickness range from thin-wall to thick-wall are manufactured. The cross roll edge-bend (CRE) method was therefore developed. The method can regulate the gap profile by crossing the vertical axes of the upper and lower rolls, to accommodate both the required bending curvature and the wall thickness. From the results of a testing using a stand fabricated on an experimental basis together with a numerical analysis, it has been demonstrated that the CRE method is advantageous for both improving the commonality of rolls to cope with varied dimensions and in the high precision formation of an edge profile with fewer impression defects.
机译：提出并研究了一种方法，以改善在各种外径和壁厚的电阻焊管中使用的轧辊的通用性，同时改善其成形边缘轮廓和质量，其中壁厚范围从薄到厚的管从厚壁到厚壁的制造。因此，开发出了交叉轧辊边缘弯曲（CRE）方法。该方法可以通过使上下辊的垂直轴交叉来调节间隙轮廓，以适应所需的弯曲曲率和壁厚。根据在实验基础上制造的机架的测试结果以及数值分析，结果表明，CRE方法既有利于提高轧辊应对各种尺寸的通用性，又有助于高精度地形成轧辊。边缘轮廓，印痕缺陷少。

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