公开(公告)号：US07174761B2

公开(公告)日：2007-02-13

申请号：US11232853

申请日：2005-09-23

申请人： Hiroyuki Iwamoto ,  Akihito Yamane ,  Tooru Egoshi ,  Kenichi Sasaki

发明人： Hiroyuki Iwamoto ,  Akihito Yamane ,  Tooru Egoshi ,  Kenichi Sasaki

IPC分类号： B21B13/12

CPC分类号： B21B17/04 ,  B21B37/78 ,  B21B2015/0028

摘要： When manufacturing a seamless pipe by carrying out elongation rolling and sizing on a mother tube for forming a seamless pipe, the occurrence of portions of thickness variation in the seamless pipe is suppressed by previously identifying the portions of wall thickness variation where the thickness varies in the circumferential direction of the seamless pipe, and carrying out elongation rolling so that the thickness of the portions of the mother tube corresponding to the portions of wall thickness variation of the seamless pipe are different in thickness at the completion of elongation rolling from that of other portions of the mother tube. As a result, local variations in wall thickness in the circumferential direction of a seamless pipe are prevented.

摘要翻译： 通过在用于形成无缝管的母管上进行伸长率轧制和上浆而制造无缝管时，通过预先识别厚度变化部分的厚度变化的部分在无缝管中的发生被抑制， 无缝管的圆周方向，并进行伸长轧制，使得与无缝管的壁厚变化部分相对应的母管部分的厚度在延伸轧制完成时的厚度与其它部分的厚度不同 的母管。 结果，防止无缝管的圆周方向的壁厚的局部变化。

公开(公告)号：US20060059969A1

公开(公告)日：2006-03-23

申请号：US11232853

申请日：2005-09-23

申请人： Hiroyuki Iwamoto ,  Akihito Yamane ,  Tooru Egoshi ,  Kenichi Sasaki

发明人： Hiroyuki Iwamoto ,  Akihito Yamane ,  Tooru Egoshi ,  Kenichi Sasaki

IPC分类号： B21B13/12

CPC分类号： B21B17/04 ,  B21B37/78 ,  B21B2015/0028

摘要： When manufacturing a seamless pipe by carrying out elongation rolling and sizing on a mother tube for forming a seamless pipe, the occurrence of portions of thickness variation in the seamless pipe is suppressed by previously identifying the portions of wall thickness variation where the thickness varies in the circumferential direction of the seamless pipe, and carrying out elongation rolling so that the thickness of the portions of the mother tube corresponding to the portions of wall thickness variation of the seamless pipe are different in thickness at the completion of elongation rolling from that of other portions of the mother tube. As a result, local variations in wall thickness in the circumferential direction of a seamless pipe are prevented.

摘要翻译： 通过在用于形成无缝管的母管上进行伸长率轧制和上浆而制造无缝管时，通过预先识别厚度变化部分的厚度变化的部分在无缝管中的发生被抑制， 无缝管的圆周方向，并进行伸长轧制，使得与无缝管的壁厚变化部分相对应的母管部分的厚度在延伸轧制完成时的厚度与其它部分的厚度不同 的母管。 结果，防止无缝管的圆周方向的壁厚的局部变化。