PRODUCTION OF HEAT TRANSFER TUBE AND DEVICE THEREFOR

Title:

PRODUCTION OF HEAT TRANSFER TUBE AND DEVICE THEREFOR

Document Type and Number:

Japanese Patent JPH09141361

Kind Code:

A

Abstract:

To stably and inexpensively obtain a heat transfer tube having plural number of fins extending straightly in the axial direction of a arranged at intervals in the circmferential direction.

A tube 1 to be machined is moves through the inside of a plowing cutting tool group of a machining bead 4 having plural numbers of plowing tools arranged radially at interval in the circumference direction against the central axis of the tube to be machines, attached freely expandably and contractably with respect to central axis, the external front face is cut with the plowing cutting tool and the plural fins extending straightly in the axial direction are stood.

Inventors:

NAKAI TAKESHI
OTANI TADAO
HOFUKU MAMORU

Application Number:

JP30556095A

Publication Date:

June 03, 1997

Filing Date:

November 24, 1995

Export Citation:

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Assignee:

HITACHI CABLE

International Classes:

B23P13/02; B21D53/06; F28F1/16; (IPC1-7): B21D53/06; B23P13/02; F28F1/16

Attorney, Agent or Firm:

Takashi Matsumoto

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