Title: Influence of lubricants in deep drawing of thick steel sheets

Authors: Marco Fabricio Lopes Pereira Da Silva, Sergio Tonini Button, Stefan Schlechtriem

Addresses: Hewlett Packard Brasil, Alphaville 06454-000, Barueri, Sao Paulo, Brazil. ' Metal Forming Laboratory, School of Mechanical Engineering, State University of Campinas, C.P. 6122, 13083-970 – Campinas, Sao Paulo, Brazil. ' Schaeffler Brasil Ltda., 18087-101 Sorocaba, Sao Paulo, Brazil

Abstract: The main objective of this was to evaluate the influence of lubrication in deep drawing of EPA sheet with thickness of 3.5 mm and to understand the occurrence of defects as cracks, and bottlenecks. The factorial Design of Experiments was applied to examine the probability of fracture as a function of the following process variables: outer diameter of the blank, radius of the tools, lubricants and performance of the blankholder. Experimental results showed that deep drawing load is significantly reduced with the five different lubricants and that lubrication is more effective when a smaller tool radius is used.

Keywords: failure; metal forming; statistical analysis; binary logistic regression; lubricants; deep drawing; thick steel sheets; defects; cracks; bottlenecks; design of experiments; DOE; fracture; lubrication; tool radius.

DOI: 10.1504/IJSURFSE.2010.029629

International Journal of Surface Science and Engineering, 2010 Vol.4 No.1, pp.55 - 67

Published online: 30 Nov 2009 *

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