Knowledge-Based System for Wire EDM
TL;DR: The paper proposes an all-round solution to a number of problems, related to the wire-EDM process, based on the development of a Knowledge-based system that enables process monitoring and control, making use of a reliable rupture probability parameter.
About: This article is published in CIRP Annals.The article was published on 1988-01-01. It has received 42 citations till now. The article focuses on the topics: Knowledge-based systems & Expert system.
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TL;DR: In this paper, the authors reviewed the vast array of research work carried out from the spin-off from the EDM process to the development of the WEDM, and highlighted the adaptive monitoring and control of the process investigating the feasibility of different control strategies of obtaining the optimal machining conditions.
Abstract: Wire electrical discharge machining (WEDM) is a specialised thermal machining process capable of accurately machining parts with varying hardness or complex shapes, which have sharp edges that are very difficult to be machined by the main stream machining processes. This practical technology of the WEDM process is based on the conventional EDM sparking phenomenon utilising the widely accepted non-contact technique of material removal. Since the introduction of the process, WEDM has evolved from a simple means of making tools and dies to the best alternative of producing micro-scale parts with the highest degree of dimensional accuracy and surface finish quality. Over the years, the WEDM process has remained as a competitive and economical machining option fulfilling the demanding machining requirements imposed by the short product development cycles and the growing cost pressures. However, the risk of wire breakage and bending has undermined the full potential of the process drastically reducing the efficiency and accuracy of the WEDM operation. A significant amount of research has explored the different methodologies of achieving the ultimate WEDM goals of optimising the numerous process parameters analytically with the total elimination of the wire breakages thereby also improving the overall machining reliability. This paper reviews the vast array of research work carried out from the spin-off from the EDM process to the development of the WEDM. It reports on the WEDM research involving the optimisation of the process parameters surveying the influence of the various factors affecting the machining performance and productivity. The paper also highlights the adaptive monitoring and control of the process investigating the feasibility of the different control strategies of obtaining the optimal machining conditions. A wide range of WEDM industrial applications are reported together with the development of the hybrid machining processes. The final part of the paper discusses these developments and outlines the possible trends for future WEDM research.
658 citations
TL;DR: A formulation and solution of a multi-objective optimization problem for the selection of the best control settings on a wire electrical discharge machine is presented and the concept of a non-dominated point is introduced.
Abstract: This paper presents a formulation and solution of a multi-objective optimization problem for the selection of the best control settings on a wire electrical discharge machine. The measures of performance for the model are taken to be metal removal rate and surface finish quality. A factorial design model is used to predict the measures of performance as a function of a variety of control settings. To aid in selecting the best combination of settings the concept of a non-dominated point is introduced. The non-dominated points are related to two important complementary optimization problems. Two techniques for the computation of non-dominated points are presented—one using explicit enumeration and the other based on the principles of dynamic programming.
206 citations
TL;DR: Current trends in applications of intelligent computing tools to manufacturing are discussed and the motivation and basis for the utilisation of these systems are reviewed.
97 citations
TL;DR: In this paper, the deviation of the wire position relative to the programmed wire path position is continuously measured and corrections are being made during the machine cutting, which allows to cut complex shapes, arc paths and contours at a much faster cutting speed as compared to conventional wire EDM machines.
79 citations
TL;DR: The aim is not to present a complete overview of all existing mechanical, physical and chemical techniques to produce parts in metallic or non-metallic sheet materials but to contribute to the development of criteria and procedures to select processes.
70 citations
References
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TL;DR: The MYCIN system has begun to exhibit a high level of performance as a consultant on the difficult task of selecting antibiotic therapy for bacteremia and issues of representation and design for the system are discussed.
619 citations
TL;DR: In this article, the so-called non-conventional machining methods can no longer be called “non-traditional”, since they found a wide range of applications, and these electro-physical and electrochemical material removal methods often do compete with the more traditional machining techniques.
156 citations
PARC1
TL;DR: Language styles based on procedures, objects, logic, rules, and constraints reflect different models for organizing programs and facilitate program evolution and understandability to make programming easier.
Abstract: Programs are judged not only by whether they faithfully carry out the intended processing but also by whether they are understandable and easily changed. Programming systems for artificial intelligence applications use specialized languages, environments, and knowledge-based tools to reduce the complexity of the programming task. Language styles based on procedures, objects, logic, rules, and constraints reflect different models for organizing programs and facilitate program evolution and understandability. To make programming easier, multiple styles can be integrated as sublanguages in a programming environment. Programming environments provide tools that analyze programs and create informative displays of their structure. Programs can be modified by direct interaction with these displays. These tools and languages are helping computer scientists to regain a sense of control over systems that have become increasingly complex.
50 citations
TL;DR: In this paper, a mathematical thermal model was developed to examine the relative influence of various process parameters on the thermal load of the wire, which enables the calculation of the temperature rise in the wire due to heat input by electrical discharges and from Joule's heat.
36 citations
TL;DR: In this article, a CAD/CAM system for mold manufacturing is presented, where a generalized interactive post-processor and a DSC link are used to enable automatic mold shape correction.
14 citations