Study on Frictional Behavior of AA 6XXX with Three Lube Conditions in Sheet Metal Forming

Paper #:
  • 2018-01-0810

Published:
  • 2018-04-03
Abstract:
Lubricants on aluminum sheet surface play an important role in stamping processes as it can reduce the friction between the die and the sheet and improve quality of products. This paper aims to develop a reliable and practical laboratory test method to investigate the influence of lubricant conditions, shim clearances and pulling speeds on friction behavior of AA 6XXX. A new double draw beads tensile test system was used to measure the friction coefficients of three surface conditions on the test aluminum alloy strip samples: regular mill finish, EDT finish and mill finish with dry lube. The test results, including digital image correlation (DIC) strain measurement, could distinguish the frictional performance of different lubricant under the same test conditions. The test results provide a target for calibration and validation of FE forming simulation. This study was considered useful and practical, as well as can emulate the real production condition in the automotive stamping operation.
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