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Experimental and numerical study of the bending process of tailor welded blanks / Bishoy Michael Rizk Dawood ; Supervised Abdalla S. Wifi , Mostafa H. Shazly , Alaa M. El-Mokaddem

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Bishoy Michael Rizk Dawood , 2014Description: 137 P. : charts , facsimiles ; 30cmOther title:
  • دراسة معملية وعددية لعملية ثنى لالواح مصممة ملحومة [Added title page title]
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  • Issued also as CD
Dissertation note: Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Mechanical Design and Production Summary: A tailor-welded blank (TWB) is comprised of two or more separate pieces of sheet metal welded together prior to stamping. TWBs allow the welding of materials with different grades, thickness or corrosion coatings together to achieve desired properties in different areas. However, several process defects appear during the forming of TWBs such as springback, reduced formability due to welding, and weld-line movement (WLM). The present work studies the effect of different process parameters on springback and WLM through an integrated experimental and numerical analysis of U-bending process of the TWB. The analysis of draw-bending process shows that, under constant BHF schemes, weld-line moves under all BHF levels considered. WLM occurs at the early stage of punch travel. This problem has been successfully solved via the use of variable blank holding force (VBHF) schemes that eliminates WLM
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Item type Current library Home library Call number Copy number Status Barcode
Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.13.13.M.Sc.2014.Bi.E (Browse shelf(Opens below)) Not for loan 01010110065040000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.13.13.M.Sc.2014.Bi.E (Browse shelf(Opens below)) 65040.CD Not for loan 01020110065040000

Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Mechanical Design and Production

A tailor-welded blank (TWB) is comprised of two or more separate pieces of sheet metal welded together prior to stamping. TWBs allow the welding of materials with different grades, thickness or corrosion coatings together to achieve desired properties in different areas. However, several process defects appear during the forming of TWBs such as springback, reduced formability due to welding, and weld-line movement (WLM). The present work studies the effect of different process parameters on springback and WLM through an integrated experimental and numerical analysis of U-bending process of the TWB. The analysis of draw-bending process shows that, under constant BHF schemes, weld-line moves under all BHF levels considered. WLM occurs at the early stage of punch travel. This problem has been successfully solved via the use of variable blank holding force (VBHF) schemes that eliminates WLM

Issued also as CD

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