Effect of tool segmentation in ultrasonic machining - Studies of ultrasonic die sinking -

O. Saito, T. Kuriyagawa

Research output: Chapter in Book/Report/Conference proceedingChapter


If a circular section tool is used for ultrasonic machining, cavitation occurs at its center. This cavitation suppresses the penetration of abrasive grains and leaves a projection at the center of a machined hole. On a square section tool, a cavitation vortex appears symmetrically on a diagonal line to promote the penetration of abrasive grains and makes the machining rate greater than that for a circular section tool. If the aspect ratio (ratio of vertical and horizontal dimensions) of the tool section is changed, the cavitation vortex changes the machining rate even when the sectional area is the same. For confirmation in detail, square section tools of different aspect ratios were created and used for SiC ultrasonic bottom die sinking to survey the machining characteristics. At the same time, tools having segmented square sections were checked for the occurrence of cavitation, and the influence on the height of the projection generated by machining was studied. Consequently, a 4-segmented tool of 3 × 4.2 mm minimized the cavitation in each element and produced the greatest machining rate of 2.26 μm/s. In every machined hole, the tool suppressed the projection height within 50 μm.

Original languageEnglish
Title of host publicationKey Engineering Materials
PublisherTrans Tech Publications Ltd
Number of pages6
ISBN (Print)9780878499748
Publication statusPublished - 2005
Externally publishedYes

Publication series

NameKey Engineering Materials
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795


  • Cavitation
  • Machining rate
  • Segment tool
  • Tool aspect ratio
  • Ultrasonic machining

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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