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Application of Uniform Design in Experiments of WEDM in Gas

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Abstract:

Comparing with conventional WEDM in emulsion, dry finishing of high-speed WEDM (HS-WEDM) has advantages such as higher material removal rate, better surface roughness and straightness. Authors have presented a new procedure as gas-liquid combined multiple cut, in which roughing is processed in dielectric liquid, and semi-finishing is in liquid or gas, while finishing is in gas. For better understanding the effect of machining parameters on surface roughness(Ra) and cutting speed (Vw) in dry finishing, a L25(56) Design test was implemented. The analysis of variance shows that offset and wire length are not significant on Ra and Vw. In this paper, the other four significant parameters, such as pulse duration, pulse interval ratio, peak current and no load worktable feed, were selected as factors in Uniform Design test. The final regression equations for Ra and Vw in terms of the actual parameter values were calculated out with MATLAB. Regression statistics of values R2 imply the two regression equtions fit well with test data and Model F-Values imply the two models are significant. Values t and α for regression equation coefficient tests of Ra and Vw show the major impacting items and interactions between them.

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Periodical:

Advanced Materials Research (Volume 426)

Pages:

11-14

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.426.11

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Online since:

January 2012

Authors:

Tong Wang, Shu Qiang Xie, Xiao Cun Xu, Q. Chen, X.C. Lü, S.H. Zhou

Keywords:

Cutting Speed, Surface Roughness (SR), Uniform Design, WEDM in Gas

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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