what is EDM process?
Answers were Sorted based on User's Feedback
Answer / sudheendra
Process.—During the EDM process, energy from the sparks created between
the electrode and the workpiece is dissipated by the melting and vaporizing of the workpiece
material preferentially, only small amounts of material being lost from the electrode.
When current starts to flow between the electrode and the work, the dielectric fluid in the
small area in which the gap is smallest, and in which the spark will occur, is transformed
into a plasma of hydrogen, carbon, and various oxides. This plasma forms a conducting
passageway, consisting of ionized or electrically charged particles, through which the
spark can form between the electrode and the workpiece. After current starts to flow, to
heat and vaporize a tiny area, the striking voltage is reached, the voltage drops, and the
field of ionized particles loses its energy, so that the spark can no longer be sustained. As
the voltage then begins to rise again with the increase in resistance, the electrical supply is
cut off by the control, causing the plasma to implode and creating a low-pressure pulse that
draws in dielectric fluid to flush away metallic debris and cool the impinged area. Such a
cycle typically lasts a few microseconds (millionths of a second, or μs), and is repeated
continuously in various places on the workpiece as the electrode is moved into the work by
the control system.
Is This Answer Correct ? | 0 Yes | 0 No |
What is meant by reflectivity?
State the difference between Forging & Fabrication?
Draw a crankshaft and show the parts?
why the direction of teeth in WOOD-CUTTING saws and IRON- CUTTING saws are different?
1hp=how much rpm
How to calculate motor bearing life - cycle (life time) (SKF bearing) how determine the capacity of refrigeration system? how we use condenser coils, compressor, capillarity,compressor how determine the capacity of refrigeration system? how we use condenser coils, compressor, capillarity,compressor what is rigging
what is your specifical way of dealing with conflict.
how can we find iron weight if we know quantity of iron
What is the principle of a pump?
why we have to know the specific frequency of any equipment? does anybody know about specific frequency ?
What is injection tag?
Do u know epicyclic gear box?What are the pratical application of epicyclic gear box?