0
RESEARCH PAPERS

Hydrodynamic Lubrication in Axisymmetric Stretch Forming—Part 2: Experimental Investigation

[+] Author and Article Information
L. G. Hector

Alcoa Technical Center, Alcoa Center, PA 15069

W. R. D. Wilson

Department of Mechanical Engineering, Northwestern University, Evanston, Il 60208

J. Tribol 113(4), 667-674 (Oct 01, 1991) (8 pages) doi:10.1115/1.2920677 History: Received July 16, 1990; Revised November 15, 1990; Online June 05, 2008

Abstract

In order to test the validity of the theoretical model discussed in Part 1, an experimental technique, employing optical interferometry, has been developed to measure lubricant film thickness during axisymmetric stretch forming. Specially fabricated, transparent punches are used for both double and multiple beam interference studies. The choice of workpiece material, lubricant, and forming speed ensures that the punch/sheet conjunction will be hydrodynamically lubricated during most of the process. Interference patterns, due to the variable film of lubricant separating the punch and sheet surfaces, are formed as the sheet wraps around the punch. These patterns provide a contour map of the lubricant film thickness along the punch/sheet conjunction. The measured film thickness, as taken from an interpretation of the patterns, is compared with the theoretical predictions of Part 1.

Copyright © 1991 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Related

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In