Title:
電縫金属管の製造設備及び方法
Document Type and Number:
Japanese Patent JP6987005
Kind Code:
B2
Abstract:
To provide a manufacturing equipment and method of an electric resistance welded metal tube capable of preventing a crack from being propagated to base material even when the crack is generated on discharge metal.SOLUTION: Manufacturing equipment of an electric resistance welded metal tube includes a pair of crushing rolls 41 for forming an inclined plane on an inner surface lateral corner part which are arranged on both sides of a metal strip 1, are pressed against an inner surface lateral corner part of the metal strip before lateral ends of the metal strip 1 are abutted onto each other, a crushing roll adjusting mechanism 42 for adjusting a pressing-against load of crushing rolls 41 to the inner surface lateral corner part by changing a separation distance of the pair of crushing rolls 41, and a crushing roll load meter 43 for measuring the loading-against load of the crushing roll 41 to the inner surface lateral corner part.SELECTED DRAWING: Figure 4
Inventors:
Koji Osamu
Makoto Akizuki
Igawa Shigenobu
Makihara
Ryota Tanaka
Makoto Akizuki
Igawa Shigenobu
Makihara
Ryota Tanaka
Application Number:
JP2018053044A
Publication Date:
December 22, 2021
Filing Date:
March 20, 2018
Export Citation:
Assignee:
Nippon Steel Corporation
Nippon Steel Plated Steel Pipe Co., Ltd.
Nippon Steel Plated Steel Pipe Co., Ltd.
International Classes:
B21C37/08; B23K13/00; B23K13/02
Domestic Patent References:
| JP61126923A | ||||
| JP63317212A | ||||
| JP52125031U | ||||
| JP62025007U | ||||
| JP2011230141A |
Attorney, Agent or Firm:
Axis International Patent Business Corporation
Previous Patent: How to raise seedlings of paddy rice
Next Patent: Electronic control device connector terminal shape
Next Patent: Electronic control device connector terminal shape