Ultrasonic block horns are prone to reliability problems associated with modal activity close to the tuned operating frequency. This paper presents an approach to block horn design, which relies on two laser based vibration measurement techniques, electronic speckle pattern interferometry (ESPI) and laser doppler velocimetry (LDV) modal analysis, to validate finite element (FE) models. Block horn vibration characteristics are interpreted from experimental and theoretical data such that successful horn redesign can be achieved from modifications to the FE models.

Issue Section:
Research Papers
Topics:
Vibration, Electronic speckle pattern interferometry, Design, Finite element analysis, Finite element model, Laser Doppler anemometry, Lasers, Modal analysis, Reliability, Vibration measurement
1.
Adachi, K., Ueha, S., and Mori, E., 1986, “Modal Vibration Analysis of Ultrasonic Plastic Welding Tools using the Finite Element Method,” Proceedings of Ultrasonics International, 1986.
2.
Lucas, M., and Chapman, G. M., 1989, “Vibration Analysis at Ultrasonic Frequencies,” Proceedings of the 12th Biennial ASME Conference on Vibration and Noise, Montreal, Canada.
3.
Lucas, M., and Chapman, G. M., 1993, “Design of Ultrasonically Assisted Radial Dies by Validated Finite Element Models,” Proceedings of Ultrasonics International ’93, Vienna, Austria, pp. 707–710.
4.
O’Shea
K.
,
1991
, “
Enhanced Vibration Control of Ultrasonic Tooling Using Finite Element Analysis
,”
Proceedings of ASME, Vibration Analysis—Analytical and Computational
, DE-Vol.
37
, pp.
259
–
265
.
5.
Shoh, A., 1976, “Welding of Thermoplastics by Ultrasound,” Ultrasonics, Vol. 14, No. 5.
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