Journal of the Association of Engineers, India

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Cutting Edge Wear and Supporting Pad Wear in B.T.A Drilling


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1 Machine Tools Laboratory, Production Engineering Section, Indian Institute of Technology, Madras-36, India
     

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Boring Trepanning Association (B. T. A) drills are capable of machining holes having a large length to diameter ratio in a single pass. This is a unique self piloted operation in which cutting and burnishing are both carried out at the same time. Wear studies on B. T. A drill reveal quite useful information regarding its life and performance.

This paper deals with wear studies on 20 mm diameter B. T. A. drill (solid boring) Heller design using EN 9 steel work samples. The studies include the flank and crater wear on the cutting edge, circular land wear and the supporting pad wear. The variation of wear with respect to cutting time for different speeds and feeds has been reported.


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  • Cutting Edge Wear and Supporting Pad Wear in B.T.A Drilling

Abstract Views: 239  |  PDF Views: 1

Authors

P. K. Ramakrishna Rao
Machine Tools Laboratory, Production Engineering Section, Indian Institute of Technology, Madras-36, India
M. S. Shunmugam
Machine Tools Laboratory, Production Engineering Section, Indian Institute of Technology, Madras-36, India

Abstract


Boring Trepanning Association (B. T. A) drills are capable of machining holes having a large length to diameter ratio in a single pass. This is a unique self piloted operation in which cutting and burnishing are both carried out at the same time. Wear studies on B. T. A drill reveal quite useful information regarding its life and performance.

This paper deals with wear studies on 20 mm diameter B. T. A. drill (solid boring) Heller design using EN 9 steel work samples. The studies include the flank and crater wear on the cutting edge, circular land wear and the supporting pad wear. The variation of wear with respect to cutting time for different speeds and feeds has been reported.