Title:
CIRCULAR SAW
Document Type and Number:
WIPO Patent Application WO/2000/048801
Kind Code:
A1
Abstract:
A circular saw capable of being provided with a base metal which can cut even in a rotating zone of min. critical rotation speed or higher, being used in a high-rotation-speed zone even if the base metal is thin, reducing a saw thickness by an amount equal to the reduced amount of the base metal, setting a high feed rate because a cutting force per tooth can be reduced by that amount, and thus increasing a work machining efficiency and an operating efficiency, characterized in that it can be used in a zone of min. critical rotation speed or higher at the time of cutting of a work and, in two modes where the node circular number of the base metal of the circle saw (m) is 0 and the same node diameter number is (n), a relative difference in natural frequency between the circular saw natural frequency and a natural frequency difference $g(D)fn/fn¿1? is 3.0 % or more for the node diameter number n = 3 and 3.5 % or more for the node diameter number n = 4, where the natural frequencies of the circular saw are fn¿1? (Hz) and fn¿2? (Hz) (where fn¿2? $m(g) fn¿1?) and the natural frequency difference $g(D)fn = fn¿2?-fn¿1?.
Inventors:
NISHIO SATORU (JP)
NAKAJIMA YASUTAKA (JP)
NAKAJIMA YASUTAKA (JP)
Application Number:
PCT/JP2000/000576
Publication Date:
August 24, 2000
Filing Date:
February 02, 2000
Export Citation:
Assignee:
KANEFUSA KNIFE & SAW (JP)
NISHIO SATORU (JP)
NAKAJIMA YASUTAKA (JP)
NISHIO SATORU (JP)
NAKAJIMA YASUTAKA (JP)
International Classes:
B27B33/08; B23D47/00; B23D61/02; (IPC1-7): B27B33/08
Foreign References:
JPH10180703A | 1998-07-07 | |||
JPH0732302A | 1995-02-03 | |||
JPH07241725A | 1995-09-19 | |||
JPS4722595A | ||||
JPS5078000A | 1975-06-25 | |||
JPS5031491A | 1975-03-27 | |||
JPS5038187A | 1975-04-09 | |||
US3204674A | 1965-09-07 | |||
GB1151382A | 1969-05-07 |
Attorney, Agent or Firm:
Yamamoto, Yoshichika (Marunouchi 3-chome Naka-ku, Nagoya-shi Aichi, JP)
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