NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Novel Horn Designs for Power UltrasonicsUltrasonic horns are used in a variety of industrial and medical applications. At JPL a rock-sampling tool based on an ultrasonic horn was developed to drill, abrade and core rock samples including hard basalts. This device is an impact device, which uses ultrasonic vibratlons that occur at the horn tip to produce a sonic resonance with the aid of a loosely connected mass. Although standard horns are found in many current industrial designs they suffer from a few key limitations when used for USDC applications. Manufacturing a horn requires turning down stock material (e.g. Titanium) from the larger outer diameter to the horn tip diameter, and this process is both time consuming and wasteful. In this paper, we present novel horn designs that are specifically designed for impact applications as the USDC. One such design addressed the excasive length that is involved with the use of the horn limiting its applications when system dimensions are constrained. For this purpose, a folded horn design was conceived that reduces the overall length of the resonator (physical length) but maintains or increases the acoustic length. Initial experiments with horns having such P design indicate that the tip displacement can be further adjusted by phasing the bending displacements and the extensional displacements. Another conceived horn design is the 'dog bone' horn that uses an end mass on the horn tip io increase the impact efficiency of the horn. In this paper, the experimental results for these novel born designs are presented and compared to the results predicted by theory.
Document ID
20100014784
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Sherrit, Stewart
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Badescu, M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bao, X.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bar-Cohen, Y.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chang, Z.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 24, 2013
Publication Date
August 24, 2004
Subject Category
Engineering (General)
Meeting Information
Meeting: IEEE Symposium on Ultrasounics
Location: Montreal
Country: Canada
Start Date: August 24, 2004
End Date: August 27, 2004
Sponsors: Institute of Electrical and Electronics Engineers
Distribution Limits
Public
Copyright
Other
Keywords
acutators
piezoelectic
drilling
ultrasonic
horns

Available Downloads

There are no available downloads for this record.
No Preview Available