Comparative Study of White Layer Characteristics for Static and Rotating Workpiece during Electric Discharge Machining
Journal: Mehran University Research Journal of Engineering and Technology (Vol.36, No. 4)Publication Date: 2017-10-01
Authors : Mehmood S. Shah M. Rana B.B. Anjum N.A. Sultan A;
Page : 819-830
Keywords : Electric Discharge Machining; Aluminum Alloy; Workpiece Rotation; White Layer;
Abstract
EDMed (Electric Discharge Machined) surfaces are unique in their appearance and metallurgical characteristics, which depend on different parameter such as electric parameters, flushing method, and dielectric type. Conventionally, in static workpiece method the EDM (Electric Discharge Machining) is performed by submerging both of the tool and workpiece in dielectric liquid and side flushing is provided by impinging pressurized dielectric liquid into the gap. Another flushing method has been investigated in this study, in which, instead of side flushing the rotation motion is provided to the workpiece. Surface characteristics for both flushing methods are determined and compared in this study. The investigated surface characteristics are: surface roughness, crater size, surface morphology, white layer thickness and composition. These investigations are performed using optical and SEM (Scanning Electron Microscope). Statistical confidence limits are determined for scattered data of surface roughness. It is found that the white layer thickness and surface roughness are directly proportional to discharge current for both flushing methods. The comparison has shown that the side flushing of statics workpiece gives thicker white layer and lower surface finish as compared to the flushing caused by the rotation of workpiece.
Other Latest Articles
- ANALYSIS OF GROSS ALPHA RADIOACTIVITY IN WELL WATER IN SOME PARTS OF KADUNA SOUTH AND ENVIRONS, NIGERIA
- SECTORAL CONTRIBUTION AND THEIR RELEVANCE IN INDIA: WITH SPECIAL REFERENCE TO THREE SOUTH INDIAN STATES
- GREEN DARNER ALGORITHM FOR SOLVING OPTIMAL POWER FLOW PROBLEM
- Effectiveness and Future Prospects of Telemedicine/Remote Health Care Management Applications in Pakistan
- BIG FIVE PERSONALITY TRAITS AND TEACHING PERFORMANCE OF FACULTY OF COLLEGE OF TEACHER EDUCATION, LAGUNA STATE POLYTECHNIC UNIVERSITY
Last modified: 2017-10-22 19:45:37