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Title:
VITRIFIED GRINDSTONE HAVING ROUGH-TEXTURED HOMOGENEOUS STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2019/193887
Kind Code:
A1
Abstract:
Provided is a vitrified grindstone having a rough-textured (porous) homogeneous structure, the vitrified grindstone being capable of grinding even hard-to-cut materials without generating a burn and while retaining shape-maintenance properties. According to this vitrified grindstone having a rough-textured homogeneous structure, abrasive grains fill the vitrified grindstone at a proportion of 23-35 vol% together with an inorganic hollow filler, the abrasive grains being homogeneous so as to have a standard deviation σ of 8.7 or less in a frequency distribution map of abrasive grain area, which is a proportion of solids including the abrasive grains per unit area at a plurality of locations in a cross-section of the vitrified grindstone. This results in high homogeneity in a grindstone structure and maintains shape-maintenance properties (reduction in the amount of wear of the grindstone) even with respect to a rough texture having a low volume ratio of abrasive grains, and therefore the generation of burns in a to-be-cut material is suppressed while shape-maintenance properties are maintained even with respect to hard-to-cut materials.

Inventors:
OGASAWARA KOUSEI (JP)
MIZUTANI TOMONORI (JP)
OHYAMA HIROSHI (JP)
Application Number:
PCT/JP2019/008220
Publication Date:
October 10, 2019
Filing Date:
March 01, 2019
Export Citation:
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Assignee:
NORITAKE CO LTD (JP)
International Classes:
B24D3/18; B24D3/00; B24D3/02
Foreign References:
JP2009072835A2009-04-09
JP2014083621A2014-05-12
JPH03184771A1991-08-12
JP2011067947A2011-04-07
JP3987719B22007-10-10
JPS6013133B21985-04-05
Attorney, Agent or Firm:
IKEDA Haruyuki et al. (JP)
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