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International Journal of Forming Processes
1292-7775
Publication suspended
 

 ARTICLE VOL 6/3-4 - 2003  - pp.371-393  - doi:10.3166/ijfp.6.371-393
TITLE
Metal Forming and Cutting with Superimposed Ultrasonic Oscillations

ABSTRACT
Metal forming with superimposed ultrasonic vibrations is a known technology but its fundamentals are still not fully clarified. Chipless cutting of metallic materials using ultrasound has not yet been scientifically investigated. In this paper, a new experimental approach is introduced. Based on a metal strip, which vibrates in longitudinal direction at 20 kHz two indentation procedures, one with hard spherical indentor and one with wedge shaped indentor for chipless cutting have been developed. These testing methods help to investigate and understand material behaviour under superimposed ultrasonics. Besides theoretical considerations experimental results of the strip vibration test, the sphere indentation test and the chipless cutting test are presented. Significant reduction of the material strength due to the superimposed vibrations is demonstrated. For identification of the sound field in the specimen during oscillation, thermography has been applied. Results of numerical time resolved finite element simulations are presented.


AUTEUR(S)
Joachim SCHÖCK, Bernd KRÖPLIN

KEYWORDS
metal forming, ultrasonics, indentation, chipless cutting, thermography.

LANGUE DE L'ARTICLE
Anglais

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