METHOD FOR PIERCING SEAMLESS STEEL PIPE - SUMITOMO KINZOKU KOGYO KK

Title:

METHOD FOR PIERCING SEAMLESS STEEL PIPE

Document Type and Number:

Japanese Patent JP2730460

Kind Code:

B2

Abstract:

PURPOSE: To improve a peeling limit, and to reduce the generation factor of a guide shoe mark by that the projection of a piercing shell between a main roll and a guide shoe, becomes less.
CONSTITUTION: When piercing a seamless steel pipe by the Mannesman system, a relative position in the perpendicular direction of a main roll 1 and a piercing shell 3 in a gorge position B, is allowed to offset on the side where the piercing shell 3 projects between the main roll 1 and a guide shoe 2 by the rotations of respective main rolls 1. And, piercing is performed at a state in which a gap between the main roll 1 and the guide shoe 2 on the side where the piercing shell 3 projects, is small.

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WO/2009/011146	PUSHER DEVICE FOR PIERCING-ROLLING PROCESS AND SEAMLESS PIPE MANUFACTURING METHOD USING SAME
JPS5935813	ROLL IN DISK GUIDE TYPE SKEW ROLLING MILL

Inventors:

KINUGASA SHUSUKE

Application Number:

JP31037093A

Publication Date:

March 25, 1998

Filing Date:

December 10, 1993

Export Citation:

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Assignee:

SUMITOMO KINZOKU KOGYO KK

International Classes:

B21B19/04; B21B23/00; (IPC1-7): B21B19/04; B21B23/00

Domestic Patent References:

JP62173011A
JP5935813A

Attorney, Agent or Firm:

Mizogami Miyoshi (2 outside)

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