Measuring and modeling friction for sheet metal forming process analysis and control

Shanlin Hao, Subbiah Ramalingam, Barney E. Klamecki

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

Abstract

Results of work describing several aspects of specifying and using friction for design and control of sheet metal forming processes are presented. First, modifications of the strip tension test typically used to measure coefficient of friction are described and results presented which show that creation of new surfaces during stretching produces changes in friction coefficient. Second, an axisymmetric finite element model of cup drawing is used to demonstrate the effect of the value of coefficient of friction used in the process simulation on drawing force. Measured punch force is compared with calculated force using various coefficient of friction values including friction coefficients measured in strip tension tests. Third, a transducer which can measure loads acting parallel to and perpendicular to its surface is described and results of its performance characterization are presented. Such transducers can be embedded in process tooling to measure local values of coefficient of friction and the restraining forces imposed on work material flow for process control.

Original languageEnglish (US)
Title of host publicationManufacturing Science and Engineering
PublisherASME
Pages1213-1226
Number of pages14
Volume2-2
StatePublished - Dec 1 1995
EventProceedings of the 1995 ASME International Mechanical Engineering Congress and Exposition - San Francisco, CA, USA
Duration: Nov 12 1995Nov 17 1995

Other

OtherProceedings of the 1995 ASME International Mechanical Engineering Congress and Exposition
CitySan Francisco, CA, USA
Period11/12/9511/17/95

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