Electrical Discharge Machining Superalloys with Adaptively Regulating Gap Servo-voltage

摘要

It is well known that due to the mechanical properties of Inconel 718, it is difficult to cut Inconel 718 with conventional machining techniques and can cause inconsistencies between EDM machined Inconel 718. The high melting point of the Inconel 718 requires a large amount of discharge energy to melt, and the low thermal conductivity reduces the use of a large amount of discharge energy. At the same time, the deionization of the liquid is incomplete because the temperature rises rapidly after a series of pulse discharges. In this way, the final result may increase and cause arc pulses to be generated, resulting in unstable processing. In order to solve this problem, the expected value of machining state is used to balance machining stability and machining efficiency for the first time. Then, an adaptive clearance servo voltage control system is built, in which the clearance servo voltage is adjusted, so that the machining state can follow the expected value of the machining state in the machining process. In this way, the current problem can be solved, and the practical experiment verifies the value and practicability of the proposition in the future.