A shape memory alloy based tool clamping device

Kostyantyn Malukhin, Hankyu Sung, Kornel Ehmann*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


The traditional collet-chuck mechanism for tool clamping is a significant source of errors in spindles due to stack-up tolerances. This, in turn, adversely affects the tool's error motions particularly in demanding micro-cutting operations performed with ultra-high-speed miniaturized spindles. Hence, novel thought for miniature tool clamping is needed to minimize tool run-out and error motions in order to meet the necessary cutting speeds and accuracy requirements. In this paper a couple of Shape Memory Alloy (SMA) based solutions for the clamping of miniature tools will be explored. For clamp actuation the so-called Two-Way Shape Memory Effect (TWSME) property of NiTi SMAs will be exploited. The basic principles, design requirements, analysis and physical realization of these devices will be discussed. It will be shown through experimental verification tests that clamping forces in excess of tens of Newtons are possible, confirming thus the feasibility of the proposed solutions.

Original languageEnglish (US)
Pages (from-to)735-744
Number of pages10
JournalJournal of Materials Processing Technology
Issue number4
StatePublished - Apr 2012


  • Clamping device
  • Micro-tool
  • NiTi
  • Shape memory effect
  • Stack-up tolerances

ASJC Scopus subject areas

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering


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