|
|
|
| High Efficient Machining Technology of Electrical Discharge Machining Ablation for Difficult-to-Cut Metal |
| LIU Zhidong |
(College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics,
Nanjing 210016, China) |
|
|
|
Abstract The process of electrical discharge machining ablation (EDM-A) machining is proposed, that is bubbled
into oxygen to the processing area in a controlled manner and firstly activates the materials under the effect of EDM induced,
then metal combustion reaction occurrs with the oxygen and materials are removed with the chemical energy of
metal burning, thus the material removal rate is greatly improved and quality of machined surface can be guaranteed by
controlling the oxygen and using the EDM trimming. This technology is suitable for “turning, milling, drilling, shaping,
deep-hole machining” for it still belongs to the machining method of no macro cutting force and it overcomes the problem
of difficulty in machining and the low efficiency of EDM for difficult-to-cut materials machining. The technology has
changed the processing guidelines of difficult-to-cut materials. And almost all combustible conductive materials are able to
be machined by EDM-A. The efficiency of EDM-A milling for Cr12 is ten times higher than the traditional EDM and the
surface quality is equivalent. The efficiency of aerosol dielectric EDM-A for Cr12 blind hole machining is 5.45 times higher
than the traditional EDM, maximum machining depth reaches 132mm and can continue processing.
|
|
|
|
|
|
|
|
|
2016, 
