The Skeleton head making-device used for manufacture of a forge-welding pipe, the Skeleton head making-method, forge-welding pipe production equipment, and a manufacturing method

Title:

The Skeleton head making-device used for manufacture of a forge-welding pipe, the Skeleton head making-method, forge-welding pipe production equipment, and a manufacturing method

Document Type and Number:

Japanese Patent JP6070742

Kind Code:

B2

Inventors:

Takaomi Kato
Tsutomu Sugiyama
Taro Okamoto

Application Number:

JP2015041324A

Publication Date:

February 01, 2017

Filing Date:

March 03, 2015

Export Citation:

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Assignee:

jfe Steel Corporation

International Classes:

B21C37/06; B21D5/12; B21D19/08; B23K20/00

Domestic Patent References:

JP5185140A
JP54120271A

Attorney, Agent or Firm:

Hiroshi Takayama

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