Title:
金属管及び金属管の製造方法
Document Type and Number:
Japanese Patent JP7265131
Kind Code:
B2
Abstract:
To reduce the slip of a gripper at a tube end part in a drawing process of a metal tube, and to more easily produce the metal tube devoted to a drawing process.SOLUTION: A metal tube (10) used for drawing process comprises a tube body (11), a tube end part (13) and a taper part (12), and the tube end part (13) has an outside diameter (d13) smaller than an outside diameter (d11) of the tube body (11). The taper part (12) connects the tube body (11) and the tube end part (13), and gradually reduces its diameter toward the tube end part. The tube end part (13) has a groove (133). The groove (133) is formed on the outer face (131) of the tube end part (13) and extends in a circumferential direction of the metal tube (10). The groove (133) is disposed separately from the base end (b13) of the tube end part (13) by 0.14 times or more of the outside diameter (d13) of the tube end part (13) in the axial direction of the metal tube (10).SELECTED DRAWING: Figure 2
Inventors:
Daisaku Yaenaga
Koichi Kuroda
Shuji Otao
Mitsuyoshi Ohtaki
Kazuya Nakane
Koichi Kuroda
Shuji Otao
Mitsuyoshi Ohtaki
Kazuya Nakane
Application Number:
JP2019044713A
Publication Date:
April 26, 2023
Filing Date:
March 12, 2019
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B21C1/22; B21C9/00; B21D41/04; C21D8/10; C22C38/00; C22C38/58
Domestic Patent References:
| JP7032029A | ||||
| JP2018034201A | ||||
| JP2016155147A |
Foreign References:
| FR959159A |
Attorney, Agent or Firm:
Ascend Patent Attorneys Corporation