BROWSE

Related Researcher

Author

Park, Hyung Wook
Multiscale Hybrid Manufacturing Lab
Research Interests
  • Multiscale hybrid manufacturing process

ITEM VIEW & DOWNLOAD

Development of a micro/meso-tool clamp using a shape memory alloy for applications in micro-spindle units

Cited 4 times inthomson ciCited 0 times inthomson ci
Title
Development of a micro/meso-tool clamp using a shape memory alloy for applications in micro-spindle units
Author
Shin, Woo-CheolRo, Seung-KookPark, Hyung WookPark, Jong-Kweon
Keywords
Axi-symmetric; Critical problems; Effect of centrifugal force; Finite element method analysis; High rotational speed; Machining tests; Micro-machining; Micro-spindle unit; Operating principles; Scaling downs; Shape memory alloy; Shrink fits; Structural configurations
Issue Date
200906
Publisher
ELSEVIER SCI LTD
Citation
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE, v.49, no.7-8, pp.579 - 585
Abstract
In developing micro-spindle units, a critical problem is miniaturization of the tool clamp. Approaches for scaling down conventional tool clamps, such as the collet-chuck, hydraulic chuck, and shrink-fit methods may be limited by their inherently complicated mechanisms. This study developed a novel tool clamp based on shape memory alloy (SMA), which allows further miniaturization. The tool clamp can be simplified by using an SMA ring, which is all that is needed for clamping. The SMA-based tool clamp does not require any collet, and its structural configuration is axisymmetric. Furthermore, the SMA makes it possible to switch between the clamped and unclamped states by using a simple device to regulate small changes in temperature. This paper first describes the operating principle of the SMA-based tool clamp. Second, it presents the finite element method (FEM) analyses that were conducted to investigate the characteristics of the clamping/unclamping operations and the effect of centrifugal force. Third, it describes a prototype of the SMA-based tool clamp, which was designed and built for applications in micro-spindle units. Fourth, it presents an evaluation of the time needed for the clamping/unclamping operations and the tool-clamping force, which were both evaluated experimentally. Finally, it describes a mill-machining test conducted with the prototype, which confirmed that the tool clamp is little affected by centrifugal force at high rotational speeds. The experimental results confirm that the proposed SMA-based tool clamp can be successfully applied to micro-machining.
URI
Go to Link
DOI
http://dx.doi.org/10.1016/j.ijmachtools.2009.02.004
ISSN
0890-6955
Appears in Collections:
MNE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU