WIRE ELECTRIC DISCHARGE MACHINE HAVING FUNCTION FOR DISCRIMINATING STATE IN WORK TANK

摘要

The wire electric discharge machine determines whether machining is submerged machining or flushing machining. If the machining is the submerged machining, when a fluid level of working fluid is lower than a predetermined height, the wire electric discharge machine prohibits a machining power from being applied. Thus, it is possible to prohibit the machining power from applied in a state in which the working fluid is insufficient and the submerged machining cannot be appropriately performed, thereby preventing an electric shock due to contact with a wire electrode and machining parts of a workpiece and preventing the working fluid from scattering to the air, and improving safety.

主权项

1. A wire electric discharge machine comprising:
a work tank; and a wire electrode arranged in the work tank, the wire electric discharge machine applying a voltage between a workpiece placed in the work tank and the wire electrode and performing machining of the workpiece while spraying working fluid between the wire electrode and the workpiece, the wire electric discharge machine further comprising: a fluid level detecting unit configured to detect a fluid level of the working fluid in the work tank; a machining type discriminating unit configured to discriminate whether a type of the machining is submerged machining for performing the machining in a state in which the wire electrode and the workpiece are submerged in the working fluid or flushing machining for performing the machining in a state in which the wire electrode and the workpiece are not submerged in the working fluid; and a machining power application prohibiting unit configured to prohibit a machining power from being applied if a discrimination result by the machining type discriminating unit indicates that the machining type is the submerged machining and a detection result by the fluid level detecting unit indicates that the fluid level is lower than a predetermined position.