Three-dimensional topography analysis of electrical discharge textured SS304 surfaces

2020 ◽  
Vol 60 ◽  
pp. 384-399
Author(s):  
S. Jithin ◽  
Upendra V. Bhandarkar ◽  
Suhas S. Joshi
Keyword(s):  
Electrical Discharge ◽  
Three Dimensional ◽  
Topography Analysis

Recent Patents on Micro-EDM Milling

2020 ◽  
Vol 13 (3) ◽  
pp. 219-229
Author(s):  
Baocheng Xie ◽  
Jianguo Liu ◽  
Yongqiu Chen
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Three Dimensional ◽  
Processing Method ◽  
Electrode Wear ◽  
Micro Edm ◽  
Processing Efficiency ◽  
Processing Methods ◽  
Machining Quality ◽  
Micro Electrical Discharge Machining

Background: Micro-Electrical Discharge Machining (EDM) milling is widely used in the processing of complex cavities and micro-three-dimensional structures, which is a more effective processing method for micro-precision parts. Thus, more attention has been paid on the micro-EDM milling. Objective : To meet the increasing requirement of machining quality and machining efficiency of micro- EDM milling, the processing devices and processing methods of micro-EDM milling are being improved continuously. Methods: This paper reviews various current representative patents related to the processing devices and processing methods of micro-EDM milling. Results: Through summarizing a large number of patents about processing devices and processing methods of micro-EDM milling, the main problems of current development, such as the strategy of electrode wear compensation and the development trends of processing devices and processing methods of micro-EDM milling are discussed. Conclusion: The optimization of processing devices and processing methods of micro-EDM milling are conducive to solving the problems of processing efficiency and quality. More relevant patents will be invented in the future.

Analytical Simulation of Random Textures Generated in Electrical Discharge Texturing

2017 ◽  
Vol 139 (11) ◽  
Author(s):  
S. Jithin ◽  
Upendra V. Bhandarkar ◽  
Suhas S. Joshi
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Three Dimensional ◽  
Roughness Parameter ◽  
Operating Conditions ◽  
Random Generation ◽  
Surface Textures ◽  
Automotive Components ◽  
3D Texture ◽  
Analytical Simulation

Textured functional surfaces are finding applications in the fields of bioengineering, surface energy, hydrodynamics, lubrication, and optics. Electrical discharge machining (EDM), which is normally used to generate smoother surface finish on various automotive components and toolings, can also generate surfaces of rough finish, a desirable characteristic for texturing purposes. There is a lack of modeling efforts to predict the surface textures obtained under various EDM operating conditions. The aim of the current work is to capture the physics of the electrical discharge texturing (EDT) on a surface assuming random generation of multiple sparks with respect to (i) space, (ii) time, and (iii) energy. A uniform heat disk assumption is taken for each individual spark. The three-dimensional (3D) texture generated is utilized to evaluate a 3D roughness parameter namely arithmetic mean height, Sa. Surface textures obtained from the model are validated against experimentally obtained ones by comparison of distribution of Ra values taken along parallel sections along the surface. It was found that the distribution of simulated Ra values agrees with that of experimental Ra values.

Technique of Brass Spiral Structure Deposition Using Micro EDM in Gas

2007 ◽  
Vol 329 ◽  
pp. 595-600
Author(s):  
Zhen Long Wang ◽  
Bai Dong Jin ◽  
Guo Hui Cao ◽  
Z.W. Wei ◽  
Wan Sheng Zhao
Keyword(s):  
Electrical Discharge ◽  
High Speed ◽  
Spiral Structure ◽  
Electrical Discharge Machining ◽  
Three Dimensional ◽  
High Speed Steel ◽  
Processing Parameters ◽  
Pulse Interval ◽  
Tool Electrode ◽  
External Diameter

This paper proposes a new deposition method using micro electrical discharge machining (EDM) to deposit micro spiral structure in gas. First, the basic principles of micro electrical discharge deposition (EDD) are analyzed and the realized conditions are predicted. Then with an ordinary EDM shaping machine, brass as the electrode, high-speed steel as the workpiece, a lot of experiments are carried out on the micro spiral structure deposition in air. The effects of major processing parameters, such as the discharge current, discharge duration, pulse interval, gravity and working medium, are obtained. As a result, a 19-circle micro spiral structure with 0.19mm in external diameter, 0.1mm in wire diameter and 3.39mm in height is deposited. Measurements show that the deposited material has obvious delaminating structure, the components of which depend on those of the tool electrode material, although Zn in the electrode is oxidized to ZnO. This method establishes the research basis for micro three-dimensional deposition machining.

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