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Article
Determining the Effect of Process Parameters on Surface Roughness in two Point Incremental Sheet Metal Forming Process using the Taguchi Method
دراسة تأثير عناصر العملية على الخشونة السطحية في عملية التشكيل التزايدي ثنائي التماس بإستخدام طريقة تاكوجي

Author: Harith Yarub Maan
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2015 Volume: 33 Issue: 7 Part (A) Engineering Pages: 1569-1582
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The main aim of this study is determining the effect of process parameters on surface roughness in two-point incremental sheet metal forming process using the Taguchi method. The experimental plan and analysis were basedon the mixed L18 Taguchi orthogonal array withfour forming parameters, tool radius (r), feed rate (f), stepover (Δz) and type of support (full and partial support) were analyzed andpyramid shape was used (57°) wall angle. The influence of the process parameters has been investigated and optimum forming condition for minimizing the surface roughness is evaluated. The analysis results show that the stepover has the highest effect on the surface roughness and followed by tool radius, feed rate and die.The result shows that the errorof predicted accuracy for the surface roughness is (1.2%).

الهدف الرئيسي للبحث هو دراسة تاثير عناصر العملية على الخشونة السطحية في عملية التشكيل التزايدي ثنائي التماس بإستخدام طريقة تاكوجي. خطة العمل والتحليل بالإستناد الى طريقة تاكوجي بإجراء 18 تجربة نوع مختلط مع اربع عناصر مختلفة للعملية: نصف قطر العدة, معدل التغذية, مسافة الانتقال بين خطوتيين, نوع الإسناد ( قالب جزئي وكامل) والمنتج المستخدم ذو شكل هرمي يمتلك زاوية جدار (57°). تأثيرعناصر العملية وإيجاد أفضل ظروف لتقليل الخشونة السطحية تمت دراستها. نتائج التحليل اظهرت ان مسافة الانتقال بين خطوتين تمتلك التأثير الأكبر على الخشونة السطحية ومن ثم نصف قطر العدة ومعدل التغذية واخيرا نوع الإسناد.كذلك بينت النتائج ان قيمة الخطأ للقيمة المتنبئة للخشونة السطحية هي (1.2%).


Article
Experimental Analysis of Several Variables Influencing Formed Thickness in Two-Point Incremental Forming Process

Authors: A.K. Ibrahim --- W.K. Hamdan
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2017 Volume: 35 Issue: 7 Part (A) Engineering Pages: 749-755
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In the current paper, an experimental analysis on Al-sheet (AA 1050) with thickness 0.9 mm to reveal the effect of relevant forming factors on the formed thickness in two-point incremental forming (TPIF) process has been conducted. The formed thickness of pyramid-like shapes was analyzed by studying seven variables: die geometry, tool diameter, tool path, stepover, tool shape, lubricant and slope angle. The proposed analysis utilizes Box-Behnken design of experiment (BBD), main effects plot (MEP) and analysis of variance (ANOVA) for sake of studying the influences of the seven forming factors on the resulted thickness. The results of these analyses have indicated that the most significant factor affecting the formed thickness is the die geometry followed by tool shape, lubricant and stepover respectively for both slope angles of the pyramid. In addition, it has been found that the other variables have also significant effects on the formed thickness at both slopes of the pyramids produced.

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