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http://dx.doi.org/10.3795/KSME-A.2011.35.9.1027

Methods for Suppressing Tearing of PET Coating During Forming of VCM Steel Sheet for Fabricating Washer  

Son, Young-Ki (Dept. of Mechanical Engineering, Pusan Nat'l Univ.)
Lee, Chan-Joo (Dept. of Mechanical Engineering, Pusan Nat'l Univ.)
Byeon, Sang-Doek (LG Electronics Inc.)
Kim, Myong-Dok (LG Electronics Inc.)
Kim, Byung-Min (Dept. of Mechanical Engineering, Pusan Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.35, no.9, 2011 , pp. 1027-1033 More about this Journal
Abstract
A VCM sheet is a metal sheet on which PET/PVC is coated for outer panels of home appliances. The purpose of this study is to obtain methods for suppressing PET tearing that occurs during the press forming of the VCM sheet. In order to identity the factors that minimize PET tearing, an FE analysis was performed. The occurrence of PET tearing cannot be predicted using the conventional forming limit diagram. PET is torn by friction between a die and sheet, which is caused by the thickening of material at a die corner. To reduce the thickening of material, the blank shape was re-designed and the thickened material at a flange was removed by a trimming process. The results of the FE-analysis involving modified process parameters showed that the thickness of the product at a die corner is distributed within the clearance of drawing and flangeforming process. A forming experiment was conducted to verify the proposed process parameters. A good final product was obtained without PET tearing of the VCM sheet.
Keywords
Vinyl Coated Metal; PET Tearing; Flange Forming;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By SCOPUS : 0
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