WORK PIECE ADHESION CERTIFICATION DEVICE FOR PREVENTING COOLANT INFILTRATION

摘要

A workpiece adhesion certification device is provided to prevent an error of a workpiece adhesion certification sensor caused due to the back pressure generated by a coolant. A workpiece adhesion certification device includes a pneumatic source(110); a pressure regulating valve(115) for regulating the pressure discharged from the pneumatic source; a first solenoid valve(120) for opening/shutting a pipeline which interconnects the pressure regulating valve and an air outlet port of a reference surface; a pressure sensing unit mounted on a pipeline which interconnects the first solenoid valve and the air outlet port, and cutting off the pipeline by switching off the first solenoid valve upon sensing a predetermined level of pressure; and a second solenoid valve(140) arranged in parallel with the first solenoid valve at an entrance of the pressure regulating valve, and supplying air of the pneumatic source to the air outlet port when the pressure sensing unit is turned on.