公开(公告)号：US20110120585A1

公开(公告)日：2011-05-26

申请号：US12810274

申请日：2009-01-28

申请人： Ju Haeng Hur ,  Dong Hyun Jeon ,  Yun Gyu Kim ,  Hyo Sub Kim ,  Sang Muk Na

发明人： Ju Haeng Hur ,  Dong Hyun Jeon ,  Yun Gyu Kim ,  Hyo Sub Kim ,  Sang Muk Na

IPC分类号： F16L9/14 ,  B21D39/20

CPC分类号： B21D26/033 ,  B21D26/02 ,  B21D26/041 ,  B21D26/051 ,  B21D39/04 ,  Y10T29/49805 ,  Y10T29/4992 ,  Y10T29/4994

摘要： Disclosed is a method of manufacturing a multilayered tube, including: preparing an outer tube, an inner tube having an outer diameter of 95˜98% of an inner diameter of the outer tube, and dies with a shaping void having a diameter of 100.20˜100.30% of an outer diameter of the outer tube; mounting the outer tube on the shaping void, with the inner tube inserted into the outer tube; plastically expanding the inner tube to be brought into contact with the outer tube by injecting a fluid into the inner tube until a pressure of the fluid reaches a first forming pressure inside the inner tube; elastically expanding the outer tube to be brought into contact with the shaping void by increasing the pressure of the fluid until the pressure of the fluid reaches a second forming pressure inside the inner tube; and elastically recovering the outer tube to allow the outer tube and the inner tube to be coupled to each other by removing the fluid from the inner tube, wherein the first forming pressure is in the range of 10˜20% of yield strength of the inner tube, and the second forming pressure is in the range of 10˜20% of yield strength of the outer tube and is maintained for 2˜3 seconds.

摘要翻译： 公开了一种制造多层管的方法，其包括：制备外管，外管的外径为外管的内径的95〜98％的内管和具有直径为100.20〜 外管外径的100.30％ 将外管安装在成形空间上，内管插入外管中; 通过将流体注入到内管中使内管塑性膨胀以与外管接触，直到流体的压力达到内管内的第一成形压力; 通过增加流体的压力直到流体的压力达到内管内的第二成形压力来弹性膨胀外管以与成形空隙接触; 并且弹性地回收外管以允许外管和内管通过从内管中除去流体而彼此联接，其中第一成形压力在内管的屈服强度的10〜20％的范围内 管，第二成形压力在外管的屈服强度的10〜20％的范围内，保持2〜3秒。

公开(公告)号：US08281476B2

公开(公告)日：2012-10-09

申请号：US12810274

申请日：2009-01-28

申请人： Ju Haeng Hur ,  Dong Hyun Jeon ,  Yun Gyu Kim ,  Hyo Sub Kim ,  Sang Muk Na

发明人： Ju Haeng Hur ,  Dong Hyun Jeon ,  Yun Gyu Kim ,  Hyo Sub Kim ,  Sang Muk Na

IPC分类号： B21D39/08 ,  B21D26/02 ,  F16B12/04

CPC分类号： B21D26/033 ,  B21D26/02 ,  B21D26/041 ,  B21D26/051 ,  B21D39/04 ,  Y10T29/49805 ,  Y10T29/4992 ,  Y10T29/4994

摘要： Disclosed is a method of manufacturing a multilayered tube, including: preparing an outer tube, an inner tube having an outer diameter of 95˜98% of an inner diameter of the outer tube, and dies with a shaping void having a diameter of 100.20˜100.30% of an outer diameter of the outer tube; mounting the outer tube on the shaping void, with the inner tube inserted into the outer tube; plastically expanding the inner tube to be brought into contact with the outer tube by injecting a fluid into the inner tube until a pressure of the fluid reaches a first forming pressure inside the inner tube; elastically expanding the outer tube to be brought into contact with the shaping void by increasing the pressure of the fluid until the pressure of the fluid reaches a second forming pressure inside the inner tube; and elastically recovering the outer tube to allow the outer tube and the inner tube to be coupled to each other by removing the fluid from the inner tube, wherein the first forming pressure is in the range of 10˜20% of yield strength of the inner tube, and the second forming pressure is in the range of 10˜20% of yield strength of the outer tube and is maintained for 2˜3 seconds.

摘要翻译： 公开了一种制造多层管的方法，其包括：制备外管，外管的外径为外管的内径的95〜98％的内管和具有直径为100.20〜 外管外径的100.30％ 将外管安装在成形空间上，内管插入外管中; 通过将流体注入到内管中使内管塑性膨胀以与外管接触，直到流体的压力达到内管内的第一成形压力; 通过增加流体的压力直到流体的压力达到内管内的第二成形压力来弹性膨胀外管以与成形空隙接触; 并且弹性地回收外管以允许外管和内管通过从内管中除去流体而彼此联接，其中第一成形压力在内管的屈服强度的10〜20％的范围内 管，第二成形压力在外管的屈服强度的10〜20％的范围内，保持2〜3秒。