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Timothy Halpin


Timothy Halpin

Name: Timothy Halpin

Position: Doctoral Research PhD

Room No.: 220

Tel: + 353 1 716 1993

Fax: + 353 1 283 0534

E-mail: timothy.halpin@ucd.ie

Qualifications: B.E.

Professional Affiliations: IEI, IMechE

 

Short Biography:

Timothy Halpin graduated from the Department of Mechanical Engineering in University College Dublin with a B.E.(Hons) in 2003. He worked with the National Heat Treatment Centre until December 2003 and continues to enjoy a close association with them.  He began a PhD programme in January 2004 under Prof. Gerald Byrne investigating the wear behaviour and failure of PCBN cutting tools in interrupted hard turning. Timothy is a member of the IEI (Institution of Engineers of Ireland) and of the IMechE (Institute of Mechanical Engineers).

 

Research Project:

The Performance of PCBN in Interrupted Hard Machining

 

Description:

This industrially sponsored research investigated the wear and failure of polycrystalline cubic boron nitride (PCBN) cutting tools in the interrupted machining of hardened steels. A wide array of disciplines including machining; fracture, dynamics, simulation, materials characterisation, design of experiments and others, were studied for this work. Experimental work included building a high-bandwidth integrated force sensor set-up; highly instrumented cutting experiments with high-speed DAQ; large-scale data processing in time and frequency domains; tool condition and failure analysis (including microscopy, SEM, TEM, EDX); workpiece composition and structure analysis and constructing FE simulations of the cutting process. 

 

Research Images:

Crater Wear detected with Optical Profilometry Interrupted Hard Machining
Crater Wear detected with Optical Profilometry Interrupted Hard Machining

 

Recent Publications:

 

Halpin T., Byrne G., Barry J., Ahearne E., 2009, The Performance of PCBN Tools in Continuous, Semi-Interrupted and Interrupted Hard Machining, Proceedings of the Institute of Mechanical Engineers Part B – Journal of Engineering Manufacture (accepted for publication)

 

Flavin R., Halpin T., O’Sullivan R., FitzPatrick D., Ivankovic A., Stephens M. M., 2008, A finite-element analysis study of the metatarsophalangeal joint of the hallux rigidus, The Journal of Bone and Joint Surgery, 90-B (10), pp. 1334 – 1340


Halpin T., Barry J., Byrne G., 2008, The Performance of PCBN Tools in Interrupted and Semi-Interrupted Hard Machining, Proc. of the 3rd CIRP International Conference on High Performance Cutting, 2, pp. 483 – 498 

 

Research Poster: