Application of Upper Bound Analysis and Taguchi Method in Aluminium Extrusion

• Kamardeen A. OGUNBAJO

  Department of Mechanical Engineering, University of Abuja, Abuja, Nigeria

  Author

• Benjamin I. UGHEOKE

  Department of Mechanical Engineering, University of Abuja, Abuja, Nigeria

  Author

• Ibrahim D. MUHAMMAD

  Department of Mechanical Engineering, University of Abuja, Abuja, Nigeria

  Author

• Emmanuel ONCHE

  Department of Mechanical Engineering, University of Abuja, Abuja, Nigeria

  Author

This research explores the use of upper bound analysis in calculating the extrusion force through u-shaped dies with varying fillet radii, billet lengths, friction coefficients and billet temperatures. Taguchi method was used in design of this experiment which is a four factor four level experiment giving a total of 16 experimental runs and aluminium 3003 was used as the workpiece. Based on these results a model equation was developed to predict the extrusion force. The correlation coefficient and covariance of the data generated, revealed that a positive and direct relationship  existed between fillet radius, billet length, friction coefficient and extrusion force, while an inverse and indirect relationship existed between billet temperature and extrusion force. The R² value was 99.96% and adjusted R² value of 99.80% and a root mean square error of 0.2137, indicating that the accuracy of the model is good.

• FJET_12_18_11

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