Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30172
CNC Wire-Cut Parameter Optimized Determination of the Stair Shape Workpiece

Authors: Chana Raksiri, Pornchai Chatchaikulsiri

Abstract:

The objective of this research is parameters optimized of the stair shape workpiece which is cut by CNC Wire-Cut EDM (WEDW). The experiment material is SKD-11 steel of stair-shaped with variable height workpiece 10, 20, 30 and 40 mm. with the same 10 mm. thickness are cut by Sodick's CNC Wire-Cut EDM model AD325L. The experiments are designed by 3k full factorial experimental design at 3 level 2 factors and 9 experiments with 2 replicate. The selected two factor are servo voltage (SV) and servo feed rate (SF) and the response is cutting thickness error. The experiment is divided in two experiments. The first experiment determines the significant effective factor at confidential interval 95%. The SV factor is the significant effective factor from first result. In order to result smallest cutting thickness error of workpieces is 17 micron with the SV value is 46 volt. Also show that the lower SV value, the smaller different thickness error of workpiece. Then the second experiment is done to reduce different cutting thickness error of workpiece as small as possible by lower SV. The second experiment result show the significant effective factor at confidential interval 95% is the SV factor and the smallest cutting thickness error of workpieces reduce to 11 micron with the experiment SV value is 36 volt.

Keywords: CNC Wire-Cut, Variable Thickness Workpiece, Design of Experiments, Full Factorial Design

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1073331

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 4448

References:


[1] http://www.sodick.jp/tech/img/discharge_fig02_new.gif
[2] Ho, K. H., S. T. Newman, S. Rahimifard and R. D. Allen, "State of the art in wire electrical discharge machining (WEDM)," International Journal of Machine Tools and Manufacture., vol.44, 2004, pp. 1247- 1259.
[3] Mahapatra, S. S. and A. Patnaik, "Parametric Optimization of Wire Electrical Discharge Machining (WEDM) Process using Taguchi Method," Journal of the Brazilian Society of Mechanical Sciences and Engineering., vol.134, 2003, pp. 273-278.
[4] Gauri, S.K. and S. Chakraborty, "Optimisation of multiple responses for WEDM processes using weighted principal components," The International Journal of Advance Manufacturing Technology., vol.40, 2009, pp. 1102-1110.
[5] Liao Y.S., M.T. Yan and C.C. Chang, "A neural network approach for the on-line estimation of workpiece height in WEDM," Journal of Materials Processing Technology., vol.121, 2002, pp. 252-258.
[6] Tarng, Y.S., S.C. Ma and L.K. Chung, "Determination of optimal cutting parameters in wire electrical discharge machining," International Journal of Machine Tools and Manufacture., vol.35, 1995, pp. 1693- 1701.
[7] Liao, Y.S. and Y.P. Yu, "Study of specific discharge energy in WEDM and its application," International Journal of Machine Tools & Manufacture., vol.44, 2004, pp. 1373-1380.
[8] Kanlayasiri, K. and S. Boonmung, "An investigation on effects of wire- EDM machining parameters on surface roughness of newly developed DC53 die steel," Journal of Materials Processing Technology., vol.187- 188, 2007, pp. 26-29.
[9] B. Soranin and P. Kuai-somboon, Metal properties. Bangkok: King Mongkut-s Institute of Technology North Bangkok, 1981, pp. 91.