Achieving nearly zero earing defects on cylindrical drawn cups with the zoning lubricant technique

Journal article

Authors/Editors

SUTASN THIPPRAKMAS

Strategic Research Themes

Innovative Materials, Manufacturing and Construction (Strategic Research Themes)
Materials synthesis and Characterization (Innovative Materials, Manufacturing and Construction)

Publication Details

Author list: Thipprakmas, Sutasn; Jankree, Rudeemas

Publisher: SAGE Publications

Publication year: 2023

Journal: Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering (0954-4089)

Volume number: 235

Issue number: 9

Start page: 1351

End page: 1362

ISSN: 0954-4089

eISSN: 2041-3009

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85162968921&doi=10.1177%2f09544089231174297&partnerID=40&md5=0ba43b5916f5e159a0f2ba4aea436e64

Languages: English-Great Britain (EN-GB)

View in Web of Science | View on publisher site | View citing articles in Web of Science

Abstract

Earing has been a major issue in the deep-drawing process, especially for cylindrical cups. The additional work required to fabricate the cylindrical cup according to its specifications is frequently caused by these defects. Only a few methods have been developed to eliminate these defects, despite knowing the origin of these defects to be the material's anisotropic mechanical property (R-value). In this study, we proposed a zoning lubricant technique to achieve practically zero earing defects by applying a varied friction coefficient in relation to the R-value. This technique was examined based on experimental work and the finite-element method (FEM). The deep-drawing process for achieving practically zero earing defects was evident based on the FEM simulation findings. This resulted in practically no earing defects being discovered, and earing defects were avoided as a result of these characteristics. However, to accomplish almost zero earing defects, the proper design of zoning lubricant uses connected to the R-value should be properly considered. According to these findings, a smaller friction coefficient should be placed along the plane and at 90° to the rolling direction, whereas a larger friction coefficient should be positioned at 45° to the rolling direction. Furthermore, it was initially discovered in the current investigation that the use of zoning lubricant could successfully execute the procedure with nearly zero earing defects. © IMechE 2023.

Keywords

cylindrical cup, Deep-drawing, earing, Lubricant