Abstract: A screwer test bench includes a coupling designed for coupling with the head of a screwer. The coupling is connected to a braking unit through a sensor unit for detection of mechanical magnitudes transmitted between the coupling and the braking unit. The braking unit includes a cap connected to the coupling and a movable member thrust on command in the brake operation direction. The movable member is constrained against rotation around the brake axis by an inextensible wall with a configuration deformable in the braking direction. Advantageously the wall is in the form of a bellows into which is fed pressurized fluid to bring about its elongation and operate the brake.

Abstract: A screwer test bench including a coupling designed for coupling with the head of a screwer and a controlled braking unit. A sensor unit detects mechanical magnitudes transmitted between the coupling and the braking unit. The braking unit includes a brake with carbon friction surfaces in an oil bath.

Abstract: A screwer test bench includes a coupling designed for connection with the head of a screwer and connected to a controlled braking unit and a sensor unit for detection of mechanical magnitudes transmitted between the coupling and the braking unit. The braking unit includes a thin cap constrained to said coupling at least in the direction of rotation and arranged between a first pressure surface thrust axially against the cap by an actuator and a second fixed opposition surface.

Abstract: A screwer test bench comprises a coupling (12) designed for connection with the head of a screwer and connected to a controlled braking unit (14) and a sensor unit (15) for detection of mechanical magnitudes transmitted between the coupling and the braking unit. The braking unit (14) comprises a thin cap (17,117) constrained to said coupling (12) at least in the direction of rotation and arranged between a first pressure surface (22) thrust axially against the cap by an actuator (19) and a second fixed opposition surface (11).

Abstract: A screwer test bench (10) comprises a coupling (12) designed for coupling with the head (13) of a screwer. The coupling is connected to a braking unit (14) through a sensor unit (15) for detection of mechanical magnitudes transmitted between the coupling and the braking unit. The braking unit (14) comprises a cap (17) connected to the coupling and a movable member (18) thrust on command in brake operation direction. The movable member (18) is constrained against rotation around the brake axis by an inextensible wall (19) with a configuration deformable in said braking direction. Advantageously the wall is in the form of a bellows into which is fed pressurized fluid to bring about its elongation and operate the brake.

Abstract: A screwer test bench comprises a coupling (12) designed for coupling with the head of a screwer and a controlled braking unit (14). A sensor unit (15) detects mechanical magnitudes transmitted between the coupling and the braking unit. The braking unit (14) comprises a brake with carbon friction surfaces (11) in an oil bath.

Abstract: A tightening tool that includes a microprocessor for management and measurement of tightening parameters and a transponder for communication with a monitoring station. The monitoring station is equipped with at least one decoder for communication with the transponder. The tool microprocessor unit receives control parameters from the station through the transponder and sends tool data to the station through the transponder.

Abstract: A manual or powered screwing tool comprising a body to which is coupled one of different removable inserts and a sensor for detection of the torque exerted on the mechanical member which sends a data signal directed to calculation means to obtain significant tool action parameters. On each insert is mounted a sender of signals designed to identify the insert in a manner differentiating it from other inserts and with the body is associated a circuit comprising an antenna member designed to receive signals sent by the sender mounted on the insert coupled to the tool with the antenna signal being directed to the calculation means to influence calculation of said parameters.

Abstract: A test method for a screwer performs the steps of connecting the screwer to a rotatable attachment element, screwing down the screwer, measuring the attachment element speed, power-supplying an electric motor to bring it to a speed close to the measured speed, connecting the shaft of the electric motor to the attachment element, and causing the motor to follow a braking ramp while the torque transmitted from the screwer to the driving shaft is measured. A device in accordance with this method includes a rotatable attachment element to which the screwer to be tested is applied, and an electric motor connected to the attachment element through a releasable coupling connecting the motor to the attachment element on achievement of a motor speed close to that of the attachment element. The motor is controlled for following a braking ramp based on a predetermined law, while a transducer measures the transmitted torque between the attachment element and braking element.