Invertis Journals of Science & Technology

Sagar Chugh ¹, Sanjeev Goyal ¹, Sanjay Kumar ¹

Affiliations
1 Department of Mechanical Engineering, YMCA University of Science & Technology, Faridabad-121006, IN

Abstract

Electrical Discharge Machining (EDM) is a non-contact machining process, which electrically removes material from any conductive workpiece. This is achieved by applying high frequency pulsed current to the workpiece through a tool electrode immersed in a dielectric fluid which subsequently melts and vaporizes the workpiece material. Unlike the traditional machining method, EDM offers many advantages, for instance, it can be used to machine very complex shape by using a simple tool electrode. In addition, the ease of machining in EDM process is only depending on the λ·θ·ρ theory, which is the product of thermal conductivity (λ), melting point (θ) and electrical resistivity (ρ) of workpiece material. As a product of electrical discharge, debris are created and accumulated in the sparking gap between the tool electrode and the workpiece. If the amounts of debris in the machining gap are too large, reduction of resistance occurs and encourages the formation of abnormal discharges, which leads to significant tool wear and slows down the material removal rate.

Keywords

WEDM, Performance Parameter.

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Sagar Chugh ¹, Sanjeev Goyal ¹, Naresh Yadav ¹

Affiliations
1 Department of Mechanical Engineering, YMCA University of Science & Technology, Faridabad-121006, IN

Abstract

The challenge of modern industries is mainly focused on the achievement of high quality, in terms of work dimensional accuracy, surface finish and higher MRR. Wire EDM machines are used to cut conductive metals of any hardness or that are difficult or impossible to cut with traditional methods. Wire EDM uses a very thin wire 0.02-0.03 mm in diameter as an electrode and machines a workpiece with electric discharge like a bandsaw by moving either workpiece or wire. The prominent feature of moving wire is that a complicated cut-out can be easily machined without using a forming electrode. This machining process is not limited by hardness, toughness and brittleness of the material and can produce intricate shape on any workpiece by suitable control over the physical parameters of the processes Machine tool industry has made exponential growth in its manufacturing capabilities in last decade but still machine tools are not utilized at their full potential. The main problem arrives in this process is the proper selection of parameters so as to utilize the process capability to full its potential. As in case of wire EDM, the limitation arises due to poor MRR and higher surface roughness which has attracted the attention of the researchers and practising engineers.

Keywords

Wire EDM, Performance Parameter.

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Kailash ¹, Rajeev Kumar Saha ¹, Sanjeev Goyal ¹

Affiliations
1 Department of Mechanical Engineering, YMCAUST, Faridabad (Haryana), IN

Abstract

Supplier selection represents one of the most important processes for an effective inventory management. Vendor selection is a complicated process. This process needs evaluation of multiple criteria and various constraints associated with them. The work represents the systematic identification of the important criteria for supplier selection process. In addition, the results exhibit the application of development of a decision model for evaluation and selection of suppliers with proposed AHP model, which by scoring the performance of suppliers is able to reduce the time taken to select a vendor. This paper is about providing the service to the customers in the material distribution system with the help of supply chain management and an investigation base for further research. Supplier and Distributor both are playing the significant role for enhancing manufacturing supply chain performance. The supply chain manager should identify the criticality of distributors and supplier in manufacturing supply chain management and understand the impact of each critical Success Factor on effective supply chain management. Therefore, a complete and structured methodology is proposed for analysing CSFs in manufacturing supply chain management. The application of decision framework has been demonstrated with an Indian case situation. Findings demonstrate that the decision framework can be useful to all manufacturing firms for prioritizing CSFs of supply chain management.

Keywords

Supply Chain Management, Vendor Selection, Analytical Hierarchy Process, Supplier Evaluation, Critical Success Factors.

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