PRODUCTION DEVICE OF TUBE WITH INTERNAL GROOVE

Title:

PRODUCTION DEVICE OF TUBE WITH INTERNAL GROOVE

Document Type and Number:

Japanese Patent JPH0760334

Kind Code:

A

Abstract:

PURPOSE: To provide a production device of a tube with internal grooves which has an excellent radiating property, an excellent durability even when grooving is highly speedily made and a stable quality.

CONSTITUTION: The device has a grooving plug 7 having grooving parts corresponding to the internal groove on its outer circumference, plural pressing rolls 12 having grooves on its outer circumference and revolves while rotating on the circular locus of the same center to the tube to be worked, and plural spherical bodies 4 fitting into the groove and pressing the outer circumference of the part to be worked of the tube to be worked by revolving on the outer circumference while rotating.

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Inventors:

SUZUKI YOSHIO
YOKOMIZO KENJI
KAGAWA MANABU

Application Number:

JP23732993A

Publication Date:

March 07, 1995

Filing Date:

August 30, 1993

Export Citation:

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Assignee:

HITACHI CABLE

International Classes:

B21C1/22; B21C3/08; B21D17/00; (IPC1-7): B21C1/22; B21C3/08; B21D17/00

Attorney, Agent or Firm:

Tadao Hirata (1 outside)

Next Patent: METHOD FOR DRAWING STEEL TUBE