Taguchi Method

Abstract: Conventional drilling still remains one of the most common machining as it widely used in the aerospace and automotive industries, although new metal cutting processes have improved in the manufacturing industries. During the experiment, focuses on the optimization of drilling parameters using the Taguchi technique to obtain minimum surface roughness and hole diameter. A number of drilling experiments were conducted using the L9 orthogonal array on conventional drilling machine. The experiments were performed on Acetal homopolymer using HSS twist drills under dry cutting conditions. The measured results were collected and analyzed with the help of the MINITAB17. Analysis of variance was used to determine the most significant

The average roughness values of surface roughness were evaluated. The surface roughness was measured parallel to each axis of hole from different points and the average values of the measurements were evaluated.

A diamond stylus is moved vertically and then moved laterally across the sample for some distance with specified contact force. A Surftest can measure small surface variations in vertical stylus displacement as a function of position.

III. Experimental design and optimization

3.1 Taguchi Method

The Taguchi method developed by Genuchi Taguchi is a statistical method used to improve the product quality. It is possible to significantly reduce the number of experiments with the Taguchi method. It is not only an experimental design technique, but also a beneficiary technique for high quality system design.

The Taguchi technique includes the following steps:

1. Determine the control factors.

2. Determine the levels of each control factor and select the appropriate orthogonal array.

3. Conduct the experiments by assigning the control factors to the selected orthogonal matrix and Analyze data and determine the optimal levels of control factors.

4. Perform the confirmation

S/N ratio is analyzed to know the significance of the factors.

4. In dry drilling, high speed and low feed are recommended for higher surface finish of hole.

V. References

[1] Risbood, K.A., Sahasrabudhe, A.D. (2003).Prediction of surface roughness and dimensional deviation by measuring cutting forces and vibrations in turning process. Journal of Materials Processing Technology, vol. 132, no. 1-3, p. 203-214, DOI:10.1017/

S0924-0136(02)00920-2.

[2] Korkut, I., Kucuk, Y. Experimental Analysis of the Deviation from Circularity of Bored Hole Based on the Taguchi Method. Strojniški vestnik - Journal of Mechanical Engineering, vol. 56, no. 5, p. 340-346.

[3] Mustafa Kurt, and Yusuf Kaynak , Application of Taguchi methods in the optimization of cutting parameters for surface finish and hole diameter accuracy in dry drilling processes. International J. Advance Manufacturing Technology., 40: 458-469,2009 .

[4] Nouari M., List G., Effect of machining parameters and coating on wear mechanisms in dry drilling of aluminium alloys. International Journal of Machine Tools & Manufacture. 45: 1436–1442, 2005.

[5] Ichien Hsu, Optimization of process parameter in drilling composite materials by Grey-Taguchi method. Tahua Insitute of Technology, Taiwan,