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Abstract: Based on the experimental results of grinding groove bottom
using electroplated CBN cup quill, a new type cup CBN quill is developed
in order to reduce corner radius between groove bottom and flank.
According to experimental study on its grinding performance, improving
measures are presented, and a good grinding result is obtained. As a
result, the corner radius of new type cup CBN quill is less than 0.2 mm
and remarkably less than one of electroplated cup CBN quill, the reduced
factor is over 60%. It is discovered that flank wear on the effect CBN
grain and subsequently the break of the CBN grain in the grinding
process make reducing the protrusion height of effect grains, and all of
the CBN grains on wheel surface become effect grains successively.
Therefore, improving the wearability of CBN grain and heightening the
toughness of CBN grain to reduce the break are effect measures to
increase life of new type CBN quill. High-toughness polycrystalline CBN
grains (GE 550 type) are chosen, it makes the life of new type CBN quill
be increased by a factor of 6.75.
Key words: CBN quill Bond Face grinding Corner radius Grinding force
CLC No: TG743
TH115
教育部留学回国人员科研启动基金和天津大学高温结构陶瓷及工程陶瓷加工技术教育部重点实验室访问学者基金资助项目.
Received 20010510, received in revised form 20020011010
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