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Article
Drawing of Hexagonal Cup

Authors: Waleed Khalid Jawed --- Sabih Salman Dawood
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 7 Part (A) Engineering Pages: 1445-1456
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The main aim of this work is to produce hexagonal cup drawn from flat sheet (blank Ø80) and effect of wall corner radii of die on drawing process. The dimension of diagonal and side hexagonal cup are (41,36mm) and (36 mm) respectively, and (0.7mm) thickness made from low carbon steel (1006–AISI), has been produced. A commercially available finite element program code (ANSYS11.0), was used to perform the numerical simulation of drawing operation. Two types of wall corner radii of die ( =0.7, 4 mm) with constant punch profile radius equal to ( =4) mm and die profile radius equal to ( =8 mm (were used to investigate the effect of die corner radius on punch force, variation of cup wall thickness and the strain distribution over the cup wall. The numerical results of this model were compared with experimental results and the results show that, the greatest thinning occurs when used wall corner radius of die equal to ( = 0.7mm) due to great stretching of the metal over the corner radius. The best strain and thickness distribution over all zones in produced cup obtained when using wall corner radius of die is equal to = 4 mm).


Article
Experimental and Numerical Study the Influence of Sheet Metal Thickness on a Deep Forming Operation of Multi Stages for Hexagonal Cup

Authors: Sabih Salman Dawood AL- Gharrawi --- Ali Tuaimah
Journal: AL-NAHRAIN JOURNAL FOR ENGINEERING SCIENCES مجلة النهرين للعلوم الهندسية ISSN: 25219154 / eISSN 25219162 Year: 2017 Volume: 20 Issue: 3 Pages: 585-599
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

In this research, experimental and analytical deep drawing of the several-stages design mold is produce hexagonal cup and also proved the influence of the thickness of the sheet on the allocation of strain and laminating in curvature of the cup area for all stages of the drawing. Three stages deep drawing mold was designed and constructed to carry out the experimental work required to produce a hexagonal cup of (28.25 mm by 24.5 mm) , (60 mm) high drawn from a circular flat sheet (80 mm diameter), made from low carbon steel (1006–AISI). Analysis program (ANSYS11.0) to perform the finite element method to accomplish the analytical side of the search. Three types of thickness sheet (t_° = 0.5, 0.7,1 mm) with constant radius of curvature of punch equal to (R_p =4) mm, radius of curvature of die equal to (R_d =8 mm) and radius of curvature of wall of die (R_c= 4 mm) were used. From the experimental and analytical results of the three stages of drawing, it has been found that drawing load less than the more advanced stages of drawing operation on the wall of cup, maximum laminating take place at curvature of the cup area with sheet thickness equal to (t_° =0.5 mm) and maximum thickening take place at the at throat cup with sheet thickness equal to (t_° =1 mm), the maximum values of strains (radial, hoop, thickness and effective) take place at throat cup with sheet thickness equal to (t_° =1 mm).

في هذا البحث، تم دراسة عملية السحب العميق ولعدة مراحل لتصميم قالب سحب ولثلاث مراحل لانتاج قدح سداسي بابعاد(24.5 mm x 28.25 mm) وبارتفاع (60 mm) من صفيحة معدنية دائرية من حديد منخفض الكربون. طريقة العناصر المحددة تم تنفيذها باستخدام برنامج. (ANSYS11.0) تم استخدام ثلاث أنواع من سمك الصفيحة (mm70, 80, 90 ( مع نصف قطر تقوس القالب الذكر (mm =4 ( ،نصف قطر تقوس القالب الأنثى ( mm =8 ( ،نصف قطر تقوس جدار القالب. (mm = 4 ( بمقارنة النتائج النظرية والعملية للمراحل الثلاثة وجد حدوث انخفاض في قوة السحب مع توالي المراحل المتعاقبة على جدار القدح ، أقصى ترقرق يحدث للسمك في منطقة تقوس القدح مع استخدام سمك صفيحة مساويا ل (mm =0.5 )، أقصى قيم الانفعالات (الانفعال القطري ،المحيطي ،السمك والمكافئ) في منطقة حلق القدح مع استخدام سمك صفيحة مساويا لـ (mm =1 ).


Article
The influence of the thickness of the plate on a deep forming operation of several stages

Authors: Sabih Salman Dawood AL Ghrawy --- Ali Tuaimah
Journal: AL-NAHRAIN JOURNAL FOR ENGINEERING SCIENCES مجلة النهرين للعلوم الهندسية ISSN: 25219154 / eISSN 25219162 Year: 2017 Volume: 20 Issue: 3 Pages: 790-800
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

In this research, practical and analytical deep drawing of the several-stages design mold is produce hexagonal cup and also proved the influence of the thickness of the plate on the allocation of strain and laminating in curvature of the cup area for all stages of the drawing. Three stages deep drawing mold was designed and constructed to carry out the practical work required to produce a hexagonal cup of (28.25 mm by 24.5 mm) , (60 mm) high drawn from a circular flat plate (80 mm diameter), made from low carbon steel (1006–AISI). Analysis program (ANSYS11.0) to perform the finite element method to accomplish the analytical side of the search. Three types of thickness plate ( = 0.5, 0.7,1 mm) with constant radius of curvature of punch equal to ( =4) mm, radius of curvature of die equal to ( =8 mm) and radius of curvature of wall of die ( =4 mm) were used.From the practical and analytical results of the three stages of drawing, it has been found that drawing load less than the more advanced stages of drawing operation on the wall of cup, maximum laminating take place at curvature of the cup area with plate thickness equal to ( =0.5 mm) and maximum thickening take place at the at throat cup with plate thickness equal to ( =1 mm), the maximum values of strains (radial, hoop, thickness and effective) take place at throat cup with plate thickness equal to ( =1 mm)

في هذا البحث، تم دراسة عملية السحب العميق ولعدة مراحل لتصميم قالب سحب ولثلاث مراحل لانتاج قدح سداسي بابعاد (mm 24.5 28.25 by mm ) وبالاتفاع (mm60 ) من صفيحة معدنية دائرية من حديد منخفض الكاربون. طريقة العناصر المحددة تم تنفيذها باستخدام برنامج. (ANSYS11.0) تم استخدام ثلاث انواع من سمك الصفيحة (70, 80, 90 mm) مع نصف قطر تقوس القالب الذكر ( =4 mm) ، نصف قطر تقوس القالب الانثى ( =8 mm) ، نصف قطر تقوس جدار القالب . ( = 4 mm) بقارنة نتائح النظرية والعملية للمراحل الثلاثة وجد حدوث انخفاض في قوة السحب مع توالي المراحل) المتعاقبة على جدار القدح ، اقصى ترقرق يحدث للسمك في منطقة تقوس القدح مع استخدام سمك صفيحة مساويا ل ( =0.5 mm) ، اقصى قيم الانفغالات (الانفعال القطري ،المحيطي ،السمك والمكافئ) في منطقة حلق القدح مع استخدام سمك صفيحة مساويا ل (=1 mm).

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