Electrical discharge machining equipment and method with equal-energy density

An electrical discharge machining equipment with equal-energy density, comprising:

• an electrode, configured to process a workpiece;
• a processing parameter database, configured to store an equal-energy density sheet, the equal-energy density sheet comprising a plurality of processing parameter sets, each of the processing parameter sets being corresponding to a material removed volume and comprising a discharge energy, a discharge parameter, a feed rate and an energy density, the energy density being generated according to a calculation of the discharge energy and the material removed volume, and the processing parameter sets having the same energy density;
• a signal capturing device, configured to detect and capture a first discharge parameter of the electrode during machining the workpiece;
• and
• a controller connected to the electrode, the processing parameter database and the signal capturing device, the controller being configured to select a first feed rate of a first processing parameter set to control the electrode for processing the workpiece according to the first discharge parameter and the equal-energy density sheet;
• wherein, when the signal capturing device detects that the first discharge parameter changes to a second discharge parameter, the controller calculates a material volume of the workpiece according to the second discharge parameter and the equal-energy density sheet, and selects a second feed rate from a second processing parameter set according to the material volume, the material removed volume and the equal-energy density sheet and controls the electrode to process the workpiece according to the second feed rate.