Measurement of die deformation in backward extrusion process for various tool dimensions

Yoshimi Murata, T. Takahashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, a laser displacement sensor Is combined with the strain gauge method for measuring the elastic deformation of a tool- workpiece Interface In cold forging. A 1-mm-diameter hole is bored radially to the depth of about 1.2 mm from the Inside surface of a die container and a steel pin Is placed in the hole for detecting radial displacements near the dle-workpiece interface. The coll spring pushes the detection pin Inward In the radial direction, while the radial displacement of the dle-workpiece Interface pushes It outward. The detection pin head faces the laser sensor head for optically measuring variations in the gap between the head of the detection pin and the laser sensor head. The displacement of the laser sensor Is simultaneously measured by the strain gauge method for adjusting the measurement obtained from the laser sensor. This combined technique Is applied to measure die deformation In the backward extrusion process of pure aluminium, and the displacement distribution over the dle-workpiece Interface with various tool dimensions Is obtained. In particular, we consider the Influence of the reduction In area and demonstrate that the proposed method Is useful for measuring die deformation in forging.

Original languageEnglish
Title of host publicationSpecial Edition
Subtitle of host publication10th International Conference on Technology of Plasticity, ICTP 2011
Pages263-268
Number of pages6
Publication statusPublished - 1 Dec 2011
Event10th International Conference on Technology of Plasticity, ICTP 2011 - Aachen, Germany
Duration: 25 Sep 201130 Sep 2011

Publication series

NameSpecial Edition: 10th International Conference on Technology of Plasticity, ICTP 2011

Conference

Conference10th International Conference on Technology of Plasticity, ICTP 2011
CountryGermany
CityAachen
Period25/09/1130/09/11

Keywords

  • Cold forging
  • Deformation
  • Tools and dies

Cite this

Murata, Y., & Takahashi, T. (2011). Measurement of die deformation in backward extrusion process for various tool dimensions. In Special Edition: 10th International Conference on Technology of Plasticity, ICTP 2011 (pp. 263-268). (Special Edition: 10th International Conference on Technology of Plasticity, ICTP 2011).