Abstract: A drive shaft balancing machine for dynamic balancing of drive shafts includes two pedestals. Each pedestal includes a spring-mounted upper part receiving a rotary spindle, a support receiving an end of a drive shaft to be balanced and a first vibration sensor detecting upper part vibrations resulting from an unbalance of the drive shaft and further involved forces in at least a first degree of freedom of motion normal to the spindle axis. On the upper part of at least one pedestal a second vibration sensor is mounted which detects the vibrations of the upper part in at least a second degree of freedom of motion. An evaluating circuit analyzes and links the vibration signals of the first and the second vibration sensors so that pitch vibration excitations of the upper part not caused by the unbalance of the drive shaft do not enter the drive shaft unbalance value computed.

Abstract: A device for the attachment of correction weights for unbalance correction to a rotary body includes a supply unit (15) for supplying individual correction weights, an attachment device (2) for applying the correction weights to the rotary body and including a first receptacle (6) for a first correction weight and a second receptacle (7) for a second correction weight, a feed unit (16) for feeding supplied correction weights to the receptacles (6, 7).

Abstract: Disclosed is a drive mechanism for driving a spin test rig, comprising a transmission casing (1) which accommodates a transmission gear unit (8) having a vertical output shaft (10) and an input shaft (9) coaxial therewith. The output shaft (10) has an upper end arranged in the transmission gear unit (8) and a lower end adapted to be coupled to a test object. The transmission casing (1) includes a casing lower part (4) detachable therefrom with the gear unit installed, in which casing part the output shaft (10) is axially and radially carried in bearings (28, 29) at a distance from its ends. The transmission gear unit (8) is configured such that the output shaft (10), together with the casing lower part (4) and the bearings arranged therein, is removable from the transmission casing (1).

Abstract: In order to determine the machining axis of a rotatable workpiece blank, a reference workpiece, which has bearing surfaces concentric to its imbalance reference axis, and subsequently a workpiece blank are received in a measurement device, and as yet unmachined surface regions of the reference workpiece and of the workpiece blank are measured by a sensor device, and the measured position data are stored by a computer as a reference partial surface and a blank partial surface in a data storage device. The computer calculates deviations between the blank partial surface and the reference partial surface and, from these, an imbalance effect which is expressed by the position of the main axis of inertia of a given workpiece. The machining axis is calculated by adding an offset to the position of the main axis of inertia, which offset has been empirically determined with the aid of the actual imbalances of previously produced workpieces measured relative to the machining axis.

Abstract: In a method for driving a turbocharger with the aid of induction air which is fed to the turbine inlet, the compressed air which exits at the compressor outlet is guided into a turbine auxiliary inlet of the turbine, which turbine auxiliary inlet opens downstream of the turbine inlet into the turbine chamber at a point, at which the pressure in the driven state of the turbine is lower than the pressure of the air which is compressed by the turbocompressor.

Abstract: Disclosed is a testing device for a tire inflation device, comprising a housing (10) which includes a bottom (11) and an annular outer wall (12) with a cylindrical inner surface (16), a piston (15) which is movably guided on the cylindrical inner surface (16), is sealed and has an annular engagement surface (20) for sealingly engaging an inflation ring (3) and a central piston opening (19), a spring (26) arranged between the bottom (11) and the piston (15), its spring force seeking to move the piston (15) away from the bottom, and sensors detecting the pressure in an inner chamber (18) adapted to be filled with compressed gas and the temperature of the housing (10).

Abstract: To correct an unbalance of rotors, a method and a device are proposed by means of which a corrective weight (15) is adapted to be welded to a rotor (2) by means of an electric welding device (14). The device comprises a robot (20) with a jointed arm (21) mounting the electric welding device (14). Arranged within reach of the jointed arm (21) is an unbalance measuring station (1) for measuring the amount of unbalance of the rotor (2) with an electronic computer which computes a corrective weight (15) to be attached to the rotor (2) for unbalance correction and transmits control data to a control device (23) of the robot (20). Under robot control, the welding device (14) picks the computed corrective weight (15) from a magazine (27) arranged within reach of the jointed arm (21) and welds it to the rotor (2) in the unbalance measuring station (1). During the welding operation the rotor (2) takes support on a first supporting device (11) and the welding device (14) on a second supporting device (12).

Abstract: Disclosed is a device for attaching corrective weights to a cylindrical outer surface of a rotor by means of electric resistance pressure welding, including an electrode (1) having a contact surface (20) for application against the rotor and comprising a supporting body (2) and a swinging body (6) having oppositely facing, congruent, spherical bearing surfaces (5, 8) suitable for abutting engagement with each other. The swinging body (6) is movably secured to the supporting body (2) such as to be able to perform limited swinging movements to all sides. A spring (14) arranged between the supporting body (2) and the swinging body (6) enables a gap to be produced between the spherical bearing surfaces (5, 8), whereby the contact surface (20) is in a position to align itself relative to the opposite surface of the rotor prior to pressure application by the welding force.

Abstract: In a tire inflating device having a machine frame (2), a tire filling bell (4) arranged on the machine frame (2) and a supporting and sealing device (5) for sealing a filling chamber. The tire filling bell (4) is comprised of a filling plate (10) and a separate filling ring (11). A magazine (3) has a magazine rack (20) and magazine guides (21) lying in a plurality of parallel planes, each of said guides being able to hold a filling ring (11, 11?) mounted so that it can move. The magazine rack (20) and the filling plate (10) can be moved with respect to each other into a plurality of transfer positions in the direction of the axis of rotation. The magazine guide (21) in each case is connected to a filling plate guide (18) arranged on the filling plate (10) in said transfer positions. A filling ring (11) which is located in the magazine guide (21) arranged in the transfer position can be conveyed by a conveying device (40) into a filling plate guide and a centered position on the filling plate (10).

Abstract: Disclosed is a mounting device (6) including a receiving opening (8) with a circular inner locating surface (10) which is coaxial with the axis of rotation (3) and serves for engagement with radially outer vertices (24) of the polygon profile of a holding pin (23). Arranged adjacent to the inner locating surface is a positioning disk (14) which has an opening (15) coaxial with the axis of rotation (3) and of such polygonal shape and size that the polygon profile of the holding pin (23) engaging in the opening (15) is supported in the opening (15) in a manner preventing relative rotation.

Abstract: Using a force-measuring balancing machine (1), the empirically determined permanent calibration is corrected in that the resonant frequencies (?1) of the rotor (2) to be balanced are calculated, in a translatory direction and (?2) in a rotational direction, from the mass (mR) of a rotor (2) to be balanced, which is mounted in the balancing machine (1), the co-oscillating mass (Ms) of the bearing supports (3), the rigidity (c) of the bearing supports (3) and the spacing (L) of the rotor bearings, and a frequency response calculated from the resonant frequencies (?1, ?2) and the frequency (?) of the rotor (2) is introduced to the permanent calibration.

Abstract: Disclosed is a testing device for a tire inflation device, comprising a housing (10) which includes a bottom (11) and an annular outer wall (12) with a cylindrical inner surface (16), a piston (15) which is movably guided on the cylindrical inner surface (16), is sealed and has an annular engagement surface (20) for sealingly engaging an inflation ring (3) and a central piston opening (19), a spring (26) arranged between the bottom (11) and the piston (15), its spring force seeking to move the piston (15) away from the bottom, and sensors detecting the pressure in an inner chamber (18) adapted to be filled with compressed gas and the temperature of the housing (10).

Abstract: Disclosed is a method in which the propulsive power of a drive nozzle (2) is controlled by means of a programmable logic control device (24) having an adjustable internal controller (25) in dependence upon the rotational frequency of a turbocharger rotor (1) detected by a speed sensor (26). Parameters necessary for control are determined empirically in a tuning run which includes tuning the controller (25) to a proportional control action with high gain Kp and inputting the nominal balancing speed as target value for the controller (25), monitoring and comparing the actual speed with the target value. If the actual speed exceeds the set target value, halving the gain Kp of the controller (25) and repeating the run until the actual speed is below the set target value.

Abstract: Disclosed is a device for the attachment of correction weights for unbalance correction to a rotary body, comprising a supply unit (15) for supplying individual correction weights, an attachment device (2) for applying the correction weights to the rotary body and including a first receptacle (6) for a first correction weight and a second receptacle (7) for a second correction weight, a feed unit (16) for feeding supplied correction weights to the receptacles (6, 7).

Abstract: In a tire inflating device having a machine frame (2), a tire filling bell (4) arranged on the machine frame (2) and a supporting and sealing device (5) for sealing a filling chamber. The tire filling bell (4) is comprised of a filling plate (10) and a separate filling ring (11). A magazine (3) has a magazine rack (20) and magazine guides (21) lying in a plurality of parallel planes, each of said guides being able to hold a filling ring (11, 11?) mounted so that it can move. The magazine rack (20) and the filling plate (10) can be moved with respect to each other into a plurality of transfer positions in the direction of the axis of rotation. The magazine guide (21) in each case is connected to a filling plate guide (18) arranged on the filling plate (10) in said transfer positions. A filling ring (11) which is located in the magazine guide (21) arranged in the transfer position can be conveyed by a conveying device (40) into a filling plate guide and a centered position on the filling plate (10).

Abstract: Disclosed is a drive shaft balancing machine (10) for the dynamic balancing of drive shafts, comprising two pedestals (13), each pedestal including an upper part (17) mounted on springs (19, 20) and receiving a rotary spindle (21), a support for receiving an end of a drive shaft (W) to be balanced and a first vibration sensor (26) which detects vibrations of the upper part resulting from an unbalance of the drive shaft (W) as well as further involved forces in at least a first degree of freedom of motion normal to the spindle axis, wherein the upper part (17) of at least one pedestal (13) mounts a second vibration sensor (29) which detects the vibrations of the upper part in at least a second degree of freedom of motion, and wherein the vibration signals of the first and the second vibration sensor (26, 29) are fed to an evaluating circuit which analyzes the vibration signals and links them in such a way that pitch vibration excitations of the upper part (17), which are not caused by the unbalance of the driv

Abstract: Disclosed is a method for determining the static unbalance of a body (30) provided with a locating surface (31) by means of a center-of-gravity weighing scale (10), the method including measuring the position of the locating surface (31) of the body (30) with respect to its mount by means of electric displacement sensors (16), computing from the measurement signals of the displacement sensors (16) the eccentricity of the locating surface (31) of the body (30) with respect to the reference point of the scale (10) by means of an electric evaluating circuit, weighing the body (30) and recording mass and position of the center of gravity of the body (30) with respect to the reference point of the scale (10), and computing the unbalance of the body (30) from the measurement signals of the scale (10) and the eccentricity of the locating surface (31) of the body (30) with respect to the reference point of the scale (10) by means of the evaluating circuit.

Abstract: Disclosed is a clamping device of a balancing machine for coaxially clamping a toolholder on a spindle rotary about an axis of rotation (3), in which the coupling shank (8) is supported in the receiving socket only on discrete supports (11-15) which are spaced from each other circumferentially and lie in three relatively spaced engagement planes (E1, E2, E3) intersecting the axis of rotation (3). Four rigid discrete supports (11-14) are arranged in pairs in the first (E1) and the second (E2) engagement plane and combine to form a rigid support in a first radial direction. Formed in the third engagement plane (E3) lying between the first and the second engagement plane is a fifth discrete support (15) which effects a supporting function in a second radial direction opposite the first radial direction.

Abstract: A device for changing the rotational angle position of a pneumatic tire relative to a rim, on which the pneumatic tire is fitted to the rim, includes a manipulating device with a gripper adapted to be rotated by a positionable rotary drive mechanism and having radially adjustable gripper fingers with oppositely facing lift-off devices. Via the gripper it is possible to load a wheel into a clamping fixture, and following unseating of the tire beads from the clamped rim the pneumatic tire can be rotated relative to the rim through a computed angular difference.

Abstract: A clamping chuck (1) for radially clamping workpieces with a cylindrical outer clamping surface includes an annular base member (2) which has a hole (5), a shoulder (11), which projects inwards radially and forms a contact surface for the workpiece, an axially-extending hole face (10) and tabs (12) which project inwards radially. Arranged on the base member (2) is a clamping member which is divided into a plurality of substantially L-shaped clamping elements (21), which each include a clamping head (24) arranged in the hole and an actuating lever (27) which extends outwards radially from the clamping head (24). Each clamping head (24) includes, on the outer side thereof, at least one cam (25), which projects outwards radially, engages in a gap between the shoulder (11) and the tabs (12) and is supported radially by the hole face (10) and axially by at least one tab (12).