| 摘要 |
The invention relates to electrical discharge milling machines using tool electrodes subject to longitudinal wear. The inventive discharge milling machine is equipped with a numerical controller executing at least one control cycle for compensating the wear considering the following steps:
- determining the volume Q eroded by each discharge,
- calculating the distance s travelled by the tool from one effective discharge to the next,
- calculating the actual eroded linear volume M [m 3 /m] for at least one effective discharge, M forming a measurement sample from the values Q and s,
- comparing said sample M with the corresponding set value C to generate an error D = C - M [m 3 /m],
- calculating and transmitting a command by the numerical controller intended to reduce this error D during the following cycle or cycles. |
