The influence of tool geometry on axial hole deviation in deep drilling : Comparison of single-and multi-edge tools

The influence of tool geometry on hole deviation is investigated using four types of deep hole drilling tools, i.e. a normal type gundrill, a standard type BTA tool, a double-edge gundrill and a multi-edge BTA tool. Two types of workpieces are used: one has an asymmetric wall thickness on the right...

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Bibliographic Details
Published in:JSME international journal 1987, Vol.30 (265), p.1167-1174
Main Authors: KATSUKI, Akio, SAKUMA, Keizo, TABUCHI, Koichi, ONIKURA, Hiromichi, AKIYOSHI, Hisashi, NAKAMUTA, Yasushi
Format: Article
Language:English
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Summary:The influence of tool geometry on hole deviation is investigated using four types of deep hole drilling tools, i.e. a normal type gundrill, a standard type BTA tool, a double-edge gundrill and a multi-edge BTA tool. Two types of workpieces are used: one has an asymmetric wall thickness on the right or left side and the other is made up of two materials where the hardness of the bonded plate is lower than that of the base metal. Experimental and theoretical results show that balanced cutting forces on the tool head contribute to decreased hole deviation. However, to some extent, an unbalanced force is necessary to give accurate hole size. A completely balanced condition of forces generates a slightly oversized hole. 7 ref.--AA
ISSN:0913-185X
DOI:10.1299/jsme1987.30.1167