Machining Characteristics of IN718 by EDM with Cooled Electrode and Vibration of the Workpiece

2020 ◽  
Vol 996 ◽  
pp. 131-136
Author(s):  
Yao Li ◽  
Cheng Cui ◽  
Bengang Lin ◽  
Li Li
Keyword(s):  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Cryogenic Cooling ◽  
Tool Electrode ◽  
Machining Efficiency ◽  
Electrical Erosion ◽  
Machining Characteristics ◽  
Edm Process ◽  
Process Material

Inconel718 has been widely used in various fields for its good performance, but it is difficult to machine with traditional machining methods. Electrical discharge machining is an alternative competitive process to machine Nickel-based alloys by electrical erosion. In order to improve reduce the electrode loss and improve the machining efficiency, the horizontal ultrasonic vibration of the workpiece and the cryogenic cooling of the tool electrode were applied into the EDM process. Material removal efficiency, surface roughness, surface topography, and microhardness have been characterized.

Productivity of EDM Process Assisted by Ultrasonic Waves

2011 ◽  
Vol 175 ◽  
pp. 157-160 ◽  
Author(s):  
Jian Wu Yu ◽  
Lucjan Dabrowski ◽  
Shao Hui Yin ◽  
Zbigniew Lechniak
Keyword(s):  
Experimental Investigation ◽  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Ultrasonic Waves ◽  
Machining Efficiency ◽  
Hybrid Machining ◽  
Ultrasonic Assisted ◽  
Edm Process

Ultrasonic assisted electrical discharge machining (USEDM) is one of hybrid machining methods based on the EDM process. The effects of ultrasonic waves on EDM process were analyzed and the experimental investigation of productivity of steel induced by USEDM was reported. Results indicated that ultrasonic waves and cavitation played an important role in improving the flushing and machining efficiency during USEDM. And the material removal rate of EDM assisted by ultrasonic waves was improved greatly.

Effect of SiC-Cu Electrode on Material Removal Rate, Tool Wear and Surface Roughness in EDM Process

2020 ◽  
Vol 38 (9A) ◽  
pp. 1406-1413
Author(s):  
Yousif Q. Laibia ◽  
Saad K. Shather
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Material Removal Rate ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
304 Stainless Steel ◽  
Tool Electrode ◽  
Pulse Time ◽  
Edm Process

Electrical discharge machining (EDM) is one of the most common non-traditional processes for the manufacture of high precision parts and complex shapes. The EDM process depends on the heat energy between the work material and the tool electrode. This study focused on the material removal rate (MRR), the surface roughness, and tool wear in a 304 stainless steel EDM. The composite electrode consisted of copper (Cu) and silicon carbide (SiC). The current effects imposed on the working material, as well as the pulses that change over time during the experiment. When the current used is (8, 5, 3, 2, 1.5) A, the pulse time used is (12, 25) μs and the size of the space used is (1) mm. Optimum surface roughness under a current of 1.5 A and the pulse time of 25 μs with a maximum MRR of 8 A and the pulse duration of 25 μs.

Investigation of the Spark Cycle Effect on Material Removal Rate in Wire Electrical Discharge Machining

Manufacturing ◽  
2003 ◽  
Author(s):  
Scott F. Miller ◽  
Albert J. Shih
Keyword(s):  
Process Parameters ◽  
Material Removal Rate ◽  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Short Circuit ◽  
Wire Electrical Discharge Machining ◽  
Time Duration ◽  
Edm Process

The development of new, advanced engineering materials and the needs for precise and flexible prototype and low-volume production have made wire electrical discharge machining (EDM) an important manufacturing process to meet such demand. This research investigates the effect of spark on-time duration and spark on-time ratio, two important EDM process parameters, on the material removal rate (MRR) and surface integrity of four types of advanced material: porous metal foams, metal bond diamond grinding wheels, sintered Nd-Fe-B magnets, and carbon-carbon bipolar plates. An experimental procedure was developed. During the wire EDM, five types of constraints on the MRR due to short circuit, wire breakage, machine slide speed limit, and spark on-time upper and lower limits have been identified. An envelope of feasible EDM process parameters is created and compared across different work-materials. Applications of such process envelope to select process parameters for maximum MRR and for machining of micro features are presented.

Machining Feasibility of a New Developed Medium in Electrical Discharge Machining

2015 ◽  
Vol 656-657 ◽  
pp. 335-340 ◽  
Author(s):  
Fang Pin Chuang ◽  
Yan Cherng Lin ◽  
Hsin Min Lee ◽  
Han Ming Chow ◽  
A. Cheng Wang
Keyword(s):  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Environmentally Friendly ◽  
Industrial Applications ◽  
Deionized Water ◽  
Machining Parameters ◽  
Machining Performance ◽  
Machining Characteristics

The environment issue and green machining technique have been induced intensive attention in recent years. It is urgently need to develop a new kind dielectric to meet the requirements for industrial applications. The aim of this study is to develop a novel dielectric using gas media immersed in deionized water for electrical discharge machining (EDM). The developed machining medium for EDM can fulfill the environmentally friendly issue and satisfy the demand of high machining performance. The experiments were conducted by this developed medium to investigate the effects of machining parameters on machining characteristics in terms of material removal rate (MRR) and surface roughness. The developed EDM medium revealed the potential to obtain a stabilizing progress with excellent machining performance and environmentally friendly feature.

Effect of Arc Discharge Pressure on Discharge Current in EDM

2008 ◽  
Vol 381-382 ◽  
pp. 451-454
Author(s):  
Atsutoshi Hirao ◽  
S. Tai ◽  
H. Takezawa ◽  
Naotake Mohri ◽  
Kazuro Kageyama ◽  
...  
Keyword(s):  
Discharge Current ◽  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Arc Discharge ◽  
Vibration Sensor ◽  
Work Piece ◽  
Tool Electrode ◽  
Discharge Pressure ◽  
Current Behavior

In electrical discharge machining (EDM), an electrical discharge occurs between a tool electrode and a work-piece, and removal of materials is carried out by vaporized explosion between the electrode and the work-piece. However, the mechanism of material removal in EDM is not well understood. In order to clarify this issue, the acoustic emission (AE) method has been applied to examine the force of explosion, and the Schlieren visualization method has been applied to observe the explosion. In this study, we investigate the effect of discharge current behavior on the occurrence of the AE waves by means of an optical fiber vibration sensor.

Enhancing the Surface Quality by Iso Pulse Generator in EDM Process

2012 ◽  
Vol 622-623 ◽  
pp. 380-384 ◽  
Author(s):  
T. Muthuramalingam ◽  
B. Mohan
Keyword(s):  
Surface Finish ◽  
Material Removal ◽  
Pulse Generator ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Machining Process ◽  
Discharge Energy ◽  
Crater Volume ◽  
Machining Characteristics ◽  
Edm Process

In automobile and aeronautical industries, complex moulds and dies is produced by Electrical Discharge Machining process. The surface finish is determined by the crater volume in EDM process. The amount of crater volume is influenced by the amount and distribution of discharge energy. The discharge energy is directly proportional to the average discharge current. This amount of current is determined by the duration of discharging effect. This study deals about evaluating the performance of iso current pulse generator on machining characteristics in EDM. Due to its ability of reducing stochastic nature in EDM process, iso pulse generator could produce better surface finish than conventional transistor pulse train generator with higher material removal rate.

Dentale Implantatstrukturen aus CrCoMo/Near-dry EDM of CrCoMo dental implant structures

2020 ◽  
Vol 110 (11-12) ◽  
pp. 811-815
Author(s):  
Lisa Marie Rickerts ◽  
Tassilo-Maria Schimmelpfennig ◽  
Ivan Perfilov
Keyword(s):  
Dental Implant ◽  
High Precision ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Tool Electrode ◽  
Process Variables ◽  
Dry Edm ◽  
Edm Process ◽  
Erosion Zone

Die Funkenerosion wird in der Dentalindustrie zur Herstellung von hochpräzisem Zahnersatz aus CrCoMo eingesetzt. Dieser Beitrag stellt die Strategie und Technologie der halbtrockenen Funkenerosion von CrCoMo-Dentalbrücken vor. Als Dielektrikum kommt ein Wasser-Luft-Gemisch zum Einsatz, dass durch ein speziell entwickeltes Spülsystem durch die Kupfer-Werkzeugelektrode in die Erodierzone injiziert wird. Um die Effizienz des halbtrockenen Erodierprozesses zu erhöhen, werden die grundlegenden Zusammenhänge zwischen ausgewählten Prozessgrößen experimentell untersucht. Electrical discharge machining (EDM) is used in dental industry for the manufacturing of high-precision dentures from CrCoMo. This article presents the strategy and technology of near-dry EDM of CrCoMo dental bridges. A water-air mixture, which is injected through the copper tool electrode into the erosion zone by a specially developed flushing system is used as dielectric. In order to increase the efficiency of the near-dry EDM process, the basic relationships between the influencing process variables are investigated experimentally.

Research of the Basic Physical Regularities of Material Removal in Electrical Discharge Machining of Tool Steel

2017 ◽  
Vol 756 ◽  
pp. 96-106
Author(s):  
Ľuboslav Straka ◽  
Slavomíra Hašová
Keyword(s):  
Tool Steel ◽  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Main Process ◽  
Tool Electrode ◽  
Electrode Wear ◽  
Workpiece Material ◽  
The Individual ◽  
Selection Of

The paper describes the basic physical regularities of material removal in Electrical discharge machining (EDM) of tool steel. One of the parameters, that material removal regularities quite accurately identifies, is the tool wear rate (TWR). This parameter, however, describes only the regularities concerning the tool electrode wear. More complex parameter for assessing regularities of material removal in EDM is thus electrode wear ratio (EWR). This parameter, except the size of the wear of the tool electrode, also describes the size of the workpiece material removal. Research on material removal was carried out on samples made out of tool steel EN X32CrMoV12-28 using Cu-ETP electrode EN CW004A. Aim of this paper was also based on the selection of main process parameters that significantly influence the material removal in EDM to define the individual specifics with regard to minimizing EWR.

Monitoring System for the Micro EDM Process

2012 ◽  
Author(s):  
Jayakumar Narasimhan ◽  
Kamlakar P. Rajurkar
Keyword(s):  
Electrical Discharge ◽  
Lead Time ◽  
Material Removal ◽  
Online Monitoring ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Micro Edm ◽  
Current Signal ◽  
The Cost ◽  
Edm Process

Now-a-days, many sophisticated systems are available to monitor the process in real time that drastically reduce the cost and lead time to manufacture a part because it takes away the offline sampling. For Electrical Discharge Machining (EDM), current signal monitors are very useful to predict the material removal rate and determine the arcing that can damage the surface. This paper discusses the design and development of an online monitoring for micro-EDM using correlation developed via experimentation. Surface roughness is predicted based on online monitoring.

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