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    • 6. 发明公开
    • Manufacturing method and manufacturing apparatus of pipe, thickness deviation information derivation apparatus, and computer program
    • Herstellungsverfahren eines Rohrs und Dickenabweichungs-Informationsableitungsvorrichtung
    • EP1889670A1
    • 2008-02-20
    • EP07023758.1
    • 2004-03-11
    • SUMITOMO METAL INDUSTRIES, LTD.
    • Yamane, Akihito
    • B21B37/78B21B17/02
    • G01B15/02B21B17/04B21B17/14B21B37/78B21B38/04
    • A complex Fourier transform is performed on measured values of wall thickness at a plurality of points in a cross section of a pipe in an axial direction, the types of thickness deviation is classified, a thickness deviation amount is calculated from the absolute value of the complex Fourier component, the position of a thick portion or thin portion of thickness deviation is calculated from the phase of the complex Fourier component, and manufacturing conditions of the pipe are adjusted based on the type of thickness deviation, the thickness deviation amount, and the position of the thick portion or thin portion. The relationship r·exp(jθ) between the thickness deviation amount r and phase θ of a first-order thickness deviation obtained for a plurality of cross sections in the axial direction is subjected to a complex Fourier transform as a function of a longitudinal direction of the pipe, the thickness deviation is further classified by the frequency of twist of the thickness deviation, and an appropriate action is taken to prevent the thickness deviation according to the classified thickness deviation.
    • 在管的横截面的轴向的多个点处的壁厚测定值进行复数傅立叶变换,将厚度偏差的种类分类,根据复合物的绝对值计算厚度偏差量 傅立叶分量,从复数傅立叶分量的相位计算厚部偏移的位置或厚度偏差的部分,根据厚度偏差,厚度偏差量和位置的类型来调整管道的制造条件 的厚部或薄部。 对于在轴向方向上获得的多个横截面获得的一阶厚度偏差的厚度偏差量r和相位¸之间的关系r·exp(j¸)进行作为纵向方向的函数的复数傅里叶变换 的厚度偏差进一步根据厚度偏差的扭转频率进行分类,并且根据分类的厚度偏差来采取适当的动作来防止厚度偏差。
    • 8. 发明公开
    • METHOD AND APPARATUS FOR PRODUCING PIPE, WALL THICKNESS VARIATION-OBTAINING DEVICE, AND COMPUTER PROGRAM
    • 方法和设备管生产设备,用于改变壁厚和计算机程序
    • EP1611969A1
    • 2006-01-04
    • EP04719652.2
    • 2004-03-11
    • SUMITOMO METAL INDUSTRIES, LTD.
    • YAMANE, Akihito, SUMITOMO METAL INDUSTRIES, LTD.
    • B21B37/78B21B17/02
    • G01B15/02B21B17/04B21B17/14B21B37/78B21B38/04
    • A complex Fourier transform is performed on measured values of wall thickness at a plurality of points in a cross section of a pipe in an axial direction, the types of thickness deviation is classified, a thickness deviation amount is calculated from the absolute value of the complex Fourier component, the position of a thick portion or thin portion of thickness deviation is calculated from the phase of the complex Fourier component, and manufacturing conditions of the pipe are adjusted based on the type of thickness deviation, the thickness deviation amount, and the position of the thick portion or thin portion. The relationship r • exp (jθ) between the thickness deviation amount r and phase θ of a first-order thickness deviation obtained for a plurality of cross sections in the axial direction is subjected to a complex Fourier transform as a function of a longitudinal direction of the pipe, the thickness deviation is further classified by the frequency of twist of the thickness deviation, and an appropriate action is taken to prevent the thickness deviation according to the classified thickness deviation.
    • 一个复杂的傅立叶变换的点的多个以管的横截面在轴向方向上执行上壁厚的测量值,其种类厚度偏差被分类,厚度偏差量从复杂的绝对值计算 傅立叶分量,一个厚的部分或厚度偏差的薄部的位置从复傅立叶分量的相位计算,和管的制造条件是基于厚度偏差,厚度偏差量,并且位置的类型调整 厚的部分或薄的部分的。 关系式R€¢厚度偏差量r和获得为横截面的在轴向方向上的多个一阶厚度偏差的相位¸之间EXP(j)的经受复杂的傅立叶变换的纵向的功能 管的方向上,厚度偏差进一步由厚度偏差的扭转频率分类,并采取适当的行动,以防止厚度偏差gemäß到分类厚度偏差。