Reference Work Entry

CIRP Encyclopedia of Production Engineering

pp 1124-1128

Date:

Specific Energy

  • Konstantinos SalonitisAffiliated withManufacturing and Materials, Cranfield University Email author 
  • , John ParalikasAffiliated withLaboratory for Manufacturing Systems and Automation (LMS), Department of Mechanical Engineering and Aeronautics, University of Patras
  • , Apostolos FysikopoulosAffiliated withLaboratory for Manufacturing Systems and Automation (LMS), Department of Mechanical Engineering and Aeronautics, University of Patras
  • , George ChryssolourisAffiliated withLaboratory for Manufacturing Systems and Automation (LMS), Department of Mechanical Engineering and Aeronautics, University of Patras

Synonyms

Energy density; Energy per unit mass; Specific power

Definition

One important parameter in machining is the specific energy as a measure for energy requirements of each process. Electrophysical and chemical processes are in general material removal processes. Specific energy (SE) is defined as the ratio of the required energy (E) to the volume of material removed (V).
$$ SE=\frac{E}{A}$$

This parameter can be used in order to estimate the portion of the energy that is used for removing material. The higher machine tool efficiency and removal rate, the better the use of consumed power for removing material, for the same power.

Theory and Application

Electrical Discharge Machining (EDM)

Electrical discharge machining (EDM) is a thermal material removal process caused by electrical discharges (Salonitis et al. 2009). Material is removed utilizing two electrodes separated by a dielectric liquid and powered by an electric voltage (Dekeyser et al. 200 ...

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