公开(公告)号：US20220371115A1

公开(公告)日：2022-11-24

申请号：US17741942

申请日：2022-05-11

申请人： Agie Charmilles SA

发明人： Marco BOCCADORO

IPC分类号： B23H7/18 ,  B23H7/20

摘要： A method and device for electrical discharge machining (EDM) a workpiece by means of a train of machining pulses. During the machining time the machining pulses are applied to the working gap between workpiece and electrode. An open voltage is first applied, and it is increased to a second open voltage level if a discharge does not occur within a waiting time d0, and further increased to a third open voltage level if a discharge does not occur within a second waiting time d1.
An average product of the actual open voltages times the partial ignition delays is computed and subtracted from the product of a reference open voltage times the total ignition delay, and the servo setpoint value is adjusted accordingly. The actual axes positions are sampled in real time and the discharge electrical parameters are adjusted accordingly. The discharge electrical parameters can be adjusted according to the duration of d0 and d1.

公开(公告)号：US20180147645A1

公开(公告)日：2018-05-31

申请号：US15817744

申请日：2017-11-20

申请人： Agie Charmilles SA

发明人： Marco BOCCADORO ,  Alessandro GIUSTI ,  Luca Maria GAMBARDELLA

IPC分类号： B23H1/02 ,  B23H11/00

摘要： A method for the machining of workpieces (11) and inspection of the processed workpiece surface in a machine tool (1), preferably a die sinking electrical discharge machine. The method uses at least one machining process interruption during which the processed surface of the workpiece (11) is inspected. Within said machining process interruption, at least one image of the processed workpiece surface is captured on the machine tool (1) by means of a digital camera (12). The images are processed by one or two pattern recognition algorithm (PRA D, PRA S), which were previously trained to determine the surface characteristics such as roughness parameters, functional surface features and/or characteristic defects of the processed workpiece surface captured on that at least one image. The determined surface characteristics are used to resume the processing of the workpiece surface with or without adjusting the processing parameters.