Modeling Of Drill Bit Transverse Vibrations

Ozan Tekinalp; A. Galip Ulsoy

doi:10.1117/12.947677

14 December 1988 Modeling Of Drill Bit Transverse Vibrations

Ozan Tekinalp, A. Galip Ulsoy

Proceedings Volume 0955, Industrial Laser Interferometry II; (1988) https://doi.org/10.1117/12.947677
Event: SPIE International Symposium on Optical Engineering and Industrial Sensing for Advance Manufacturing Technologies, 1988, Dearborn, MI, United States

Abstract

Drill bit natural frequencies and mode shapes are investigated using holographic interferometry techniques. For these experiments a fixture is developed to simulate some of the most important process parameters. The drill bit is fixed using an actual drill holder, and a hole drilled by the given drill bit. Then it is loaded to a nominal thrust force typical of machining. The structure is then excited using a piezoelectric exciter at various natural frequencies. The mode shapes of the drill bit are recorded on a photographic plate. The results of the experiments are then utilized toward the development of an analytical model. The model is a twisted Euler-Bernoulli beam subjected to thrust force and trasverse cutting forces. It also includes the rotation of the drill bit. The analytical model is solved using finite element techniques. The results from the holographic experiments are then compared to the numerical results obtained from the finite element analysis, and good agreement is observed. The validated finite element model is potentially useful for design and process optimization in drilling, as well as for process control.

Citation Download Citation

Ozan Tekinalp and A. Galip Ulsoy "Modeling Of Drill Bit Transverse Vibrations", Proc. SPIE 0955, Industrial Laser Interferometry II, (14 December 1988); https://doi.org/10.1117/12.947677

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KEYWORDS

Chemical elements

Holography

Process control

Finite element methods

Holographic interferometry

Information technology

Laser drilling

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