ECCENTRIC DRILLING METHOD FOR RESIN PIPE

Title:

ECCENTRIC DRILLING METHOD FOR RESIN PIPE

Document Type and Number:

Japanese Patent JP2002228074

Kind Code:

A

Abstract:

To provide an eccentric drilling method for a resin pipe capable of drilling a hole by smooth rotational push-cutting using a hole saw without generating any chips or burrs.

A branch port 4 is drilled at the position eccentric from the perpendicular neutral plane HCL of the resin pipe 1 by lowering the cylindrical hole saw 2 parallel to the perpendicular neutral surface HCL in a rotating manner. The cutting depth X of the branch port 4 is set to be smaller than the inside radius d of a hole saw body 2a, and larger than the wall thickness t of the resin pipe 1. A blade tip 3a of the hole saw 2 is formed straight double tooth type or single tooth type over the whole circumference in the circumferential direction of the lower end of the hole saw body 2a.

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Inventors:

KAWAMURA TAKEAKI
SATO MASAKUNI
ASANO HITOSHI
KATO TAKAYUKI
MINAMIDE YOSHIAKI
KISHIMOTO YUJI

Application Number:

JP2001022951A

Publication Date:

August 14, 2002

Filing Date:

January 31, 2001

Export Citation:

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Assignee:

KEIYO GAS KK
NIPPON KOKAN KK
NIPPON KOKAN PIPE FITTING MFG

International Classes:

B23B41/00; B23B51/04; F16L41/04; (IPC1-7): F16L41/04; B23B41/00; B23B51/04

Domestic Patent References:

JP2000130676A	2000-05-12
JPH04124395U	1992-11-12

Attorney, Agent or Firm:

Koichi Suzue (1 person outside)

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