Fixing device of a flat piece of depression of the air of the type of table a depression for machining center

摘要

The invention relates to a fixing device of a flat part by suction of air of the type of a vacuum table, characterized in that it comprises essentially: - a horizontal panel (1) comprising on its upper surface a plurality of cylindrical cavities (2), the inner wall comprises a suction orifice (15) and an orifice of the pressure (16); - positioning studs (3) which fits in said cylindrical cavities (2) of the horizontal panel (1), the said studs having a cylindrical body (5) in which there slides a movable element (4) to move vertically between a low position and a high position, the upper face of said moving element comprising a sensor of the distributor (6) and, on its periphery, a seal (7), said sensor distributor (6) controlling a passage of air coming from a pneumatic circuit (8) communicating with the orifice of depression (15) to an intermediate circuit (9) provided with a chamber in which there slides a piston (11), said piston (11) comprising a distribution means controlling the passage of air coming from a pneumatic circuit (14) communicating with the orifice of pressure (16) to a circuit (17) provided with a chamber (23). The increase in pressure in said chamber (23) allows the travel of the moving element (4) of the positioning stud (3).