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IJAT Vol.8 No.3 pp. 461-467
doi: 10.20965/ijat.2014.p0461
(2014)

Paper:

Methods to Measure Wire Deflection in Wire EDM Machining

Jui-Fang Liang and Y. S. Liao

*Department of Mechanical Engineering, National Taiwan University, No.1, Sec.4, Roosevelt Road, Taipei 106, Taiwan

Received:
July 18, 2013
Accepted:
March 10, 2014
Published:
May 5, 2014
Keywords:
wire-cut EDM, wire deflection, camera picture analysis, cross section measurement
Abstract

It is well kown that the wire electrode is flexible and will lead to a big lag in wire EDM machining, especially in the middle area of the work-piece. Methods to measure the wire deflection when it passes through the work-piece are studied in this paper. It is found that there is discharge spark first at the upper and lower parts of the wire when it cuts to the edge of the work-piece. The discharge spark appears at the middle of the work-piece a few seconds later. Based on this result, a method coined Camera Picture Analysis (CPA) is proposed to estimate the wire deflection. Another method of cross section measurement by the CCD is proposed to make a cross reference with the CPA method. By applying these two methods, the wire deflection models can be established, and used for the corner cut control of wire-cut EDM to improve accuracy of the machined parts.

Cite this article as:
J. Liang and Y. Liao, “Methods to Measure Wire Deflection in Wire EDM Machining,” Int. J. Automation Technol., Vol.8, No.3, pp. 461-467, 2014.
Data files:
References
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Last updated on Nov. 18, 2019