Journal
ACTA METALLURGICA SLOVACA
Volume 26, Issue 2, Pages 42-44Publisher
SCICELL SRO
DOI: 10.36547/ams.26.2.553
Keywords
coefficient of friction; friction; mechanical engineering; sheet metal forming; steel sheets; work hardening
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The aim of the research presented in this article is to investigate the frictional resistance of steel sheets with different drawing quality. Friction tests have been carried out using the bending under tension (BUT) test which simulates the contact conditions at the rounded edge of the punch in sheet metal forming operations. The effect of sheet deformation and temper state on the value of the coefficient of friction has been studied. It was found that increasing the value of elongation of the sheet is associated with an increase in the value of the COF for both friction conditions analysed. The intensity of work hardening, by changing the mechanical properties of the sheet, is a factor that changes contact conditions. The lubricant which is typically used in plastic working provided a reduction of frictional resistance by approximately 3.6-14%, depending on the degree of sheet deformation.
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