Digital Gap Monitor and Adaptive Integral Control for Auto-Jumping in EDM-Reference-Cited by-同舟云学术

Digital Gap Monitor and Adaptive Integral Control for Auto-Jumping in EDM

Published:1995-05-01 Issue:2 Volume:117 Page:253-258
ISSN:0022-0817
Container-title:Journal of Engineering for Industry
language:en
Short-container-title:

Author:

Wang W. M.¹,Rajurkar K. P.¹,Akamatsu K.²

Affiliation:

1. Nontraditional Manufacturing Research Center, University of Nebraska-Lincoln, Lincoln, NE 68588

2. Mitsubishi Electric Corp., Japan

Abstract

This paper reports a monitoring and adaptive integral control strategy for EDM to regulate the cycle time of the periodical retraction (jumping) of the tool electrode according to the gap condition. A digital EDM gap monitor has been developed to detect the time ratios of gap states with a resolution of 0.2 μs. The theoretical and experimental analysis of the effect of sensing parameter combinations on control aspects and performance of manual setting, integral control and adaptive integral control methods have been carried out. Experimental verification shows that the proposed system results in higher erosion rate, better machining stability, and complete avoidance of arc damage.

Publisher

ASME International

Subject

General Medicine

Link

http://asmedigitalcollection.asme.org/manufacturingscience/article-pdf/117/2/253/6493991/253_1.pdf

Reference13 articles.

1. A˚stro¨m, K. J., and Wittenmark, B., 1989, Adaptive Control, Addison-Wesley, Reading, MA.

2. Davis, M. H. A., and Vinter, R. B., 1985, Stochastic Modelling and Control, Chapman and Hall, London, New York.

3. Kruth, J. P., 1992, “Automatic Control in Electro Physical and Chemical Machining,” Proceedings of the 10th International Symposium of Electro-machining, Addendum, Germany.

4. Pandit S. M. , and MuellerT. M., 1987, “Verification of On-line Computer Control of EDM by DDS,” ASME JOURNAL OF ENGINEERING FOR INDUSTRY, Vol. 109, pp. 117–121.

5. Rajurkar K. P. , and WangW. M., 1989, “A New Model Reference Adaptive Control of EDM,” Annals of the CIRP, Vol. 38, No. 1, pp. 183–186.

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