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Title:
CIRCULAR SAW BLADE WITH TIPS
Document Type and Number:
WIPO Patent Application WO/2017/033658
Kind Code:
A1
Abstract:
[Problem] Circular saw blades which cut a seam-welded pipe while traveling in synchronization with the traveling speed of the seam-welded pipe and which go around the seam-welded pipe in a seam-welded pipe production line, have an excessive load put on hard tips thereof because of the limited cutting time, resulting in reduced durability and the possibility of chipping. [Solution] A flank 18 is provided with: a first flank 20 located at the center thereof; and second and third flanks 22, 24 located inclined toward each side of the first flank 20. Thus, the vicinity of the lateral sides of the flank 18 has a constant relief angle toward the rear from a cutting edge ridge 34, thereby providing the advantages of an increase in strength and resistance to chipping. Furthermore, a fourth flank 26 having a larger relief angle is separately provided at the rear of the first flank 20 located at the center. Thus, even if the wear on the first flank 20 occurs early, it is possible to reduce the wear on the fourth flank 26 and improve the durability.

Inventors:
NAKAJIMA, Yasutaka (1-1 Nakaoguchi, Ohguchi-cho, Niwa-gu, Aichi 92, 〒4800192, JP)
OKABE, Fuminori (1-1 Nakaoguchi, Ohguchi-cho, Niwa-gu, Aichi 92, 〒4800192, JP)
Application Number:
JP2016/072177
Publication Date:
March 02, 2017
Filing Date:
July 28, 2016
Export Citation:
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Assignee:
KANEFUSA KABUSHIKI KAISHA (1-1 Nakaoguchi, Ohguchi-cho Niwa-gu, Aichi 92, 〒4800192, JP)
International Classes:
B23D61/04
Foreign References:
JP2008006530A2008-01-17
JPH058115A1993-01-19
US4604933A1986-08-12
JP2012056067A2012-03-22
JP2000052140A2000-02-22
JPH049220U1992-01-27
US20110318119A12011-12-29
Attorney, Agent or Firm:
YAMAMOTO, Yoshichika et al. (7Fl The 16th KT Bldg, 15-34 Marunouchi 3-chome, Naka-ku, Nagoya-sh, Aichi 02, 〒4600002, JP)
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