Method and apparatus for grinding brittle materials

Abrading – Abrading process – Glass or stone abrading

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451 28, B24B 100

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055734472

ABSTRACT:
A brittle-material machining method and apparatus achieves grinding in a ductile mode region using an ordinary grinding apparatus. Grinding or polishing of a workpiece consisting of a brittle material is performed by relative movement between the workpiece and a grinding wheel, which includes innumerable abrasive grains provided on a support base, while the grinding wheel is brought into pressured contact with the workpiece at a prescribed pressure. The grinding or polishing is carried out upon setting the prescribed pressure in such a manner that depth of cut d, into the workpiece, of abrasive grains among the innumerable number thereof that participate in the grinding or polishing is made less than a critical depth of cut d.sub.c, which is a minimum depth of cut at which brittle fracture is produced in the workpiece.

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patent: 5035087 (1991-07-01), Nishiguchi et al.
patent: 5113622 (1992-05-01), Nishiguchi et al.
patent: 5297365 (1994-03-01), Nishioka et al.
patent: 5374293 (1994-12-01), Takashita et al.
patent: 5435772 (1995-07-01), Yu

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