Effect of low-temperature gas-cooled electrode on the performance of EDM process

This article investigated on the cooling effect of cold nitrogen-air mixed gas on copper electrode during electrical discharge machining of W 6 Mo 5 Cr 4 V 2 high-speed steel. Material removal rate (MRR), electrode wear (EW), and electrode wear rate (EWR) were observed to evaluate the cooling effect...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2016-09, Vol.86 (1-4), p.717-722
Main Authors: Li, L., Bi, F. Q., Feng, L., Bai, X.
Format: Article
Language:English
Subjects:
CAE) and Design
Computer-Aided Engineering (CAD
Cooling
Cooling effects
Cooling rate
Cracks
EDM electrodes
Electric discharge machining
Electric discharges
Electrodes
Engineering
High speed tool steels
Industrial and Production Engineering
Low temperature
Material removal rate (machining)
Mechanical Engineering
Media Management
Original Article
Process parameters
Temperature
Wear rate
Workpieces
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Summary:This article investigated on the cooling effect of cold nitrogen-air mixed gas on copper electrode during electrical discharge machining of W 6 Mo 5 Cr 4 V 2 high-speed steel. Material removal rate (MRR), electrode wear (EW), and electrode wear rate (EWR) were observed to evaluate the cooling effect. Temperature was the controllable variable under the set process parameters. Results show that the MRR of the workpiece changes slightly when the electrode was cooled above −80 °C. EW decreases with the decrease in temperature. Relative electrode wear (REW) decreases with the decrease in temperature when the cooled temperature is above −80 °C. With electrode cooling, metal that sputtered onto the electrode surface is less under low temperatures. Temperature below −80 °C may cause cracks on the surface of the workpiece.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-015-8115-x