Abstract: A process and device corrects an ascertained unbalance on a rotor (1) that has equidistantly arranged sites along a rotor circumference for an unbalance correction by means of material removal. Correction tools (5,5′) arranged at a fixed distance from each other are provided, and the correction tools (5,5′) can be positioned crosswise to the rotor axis (10) by a movement between the rotor (10) and the correction tools (5,5′) in the tangential direction resulting from the ascertained rotor unbalance. For purposes of material removal, the correction tools (5,5′), are moved, at least in the radial direction between the rotor (10) and the correction tools (5,5′), into the rotor (1) by a movement resulting from the ascertained rotor unbalance. In order to carry out an unbalance correction in one single work step using the simplest possible set-up, just two correction tools (5,5′) are provided.

Abstract: A splined shaft head for engaging a splined hub includes first, second and third stages. The first stage has a conical taper on one side, and a cylindrical setback on the other side, which transitions through a tapered shoulder to the cylindrical body of the shaft head. The second stage includes lead spline teeth extending along the cylindrical body to the conical taper. The third stage includes torque-transmitting main spline teeth regularly arranged around the circumference. The shaft head is rotated while being inserted axially into the hub. The first stage allows radial free play and de-centering of the hub so the lead spline teeth find a proper rotational alignment with spline grooves of the hub. Then, the tapered shoulder at the end of the first stage positively centers the hub on the shaft axis, and finally the main spline teeth of the third stage provide full form-locking engagement.

Abstract: A pneumatic tire filling station includes a support and seal arrangement on which one side wall of the tire is supported and sealed, and a tire filling bell that presses and seals against the opposite side wall of the tire and then supplies pressurized air into the tire. The filling bell includes outer and inner rings that are concentrically slidable relative to each other. One of the rings is selected for the filling operation depending on the size of the tire. The support and seal arrangement includes plural plate members that are joined and sealed together to form a continuous support and seal surface, or moved laterally apart to allow a transport apparatus to carry and support the mounted tire from underneath. The tire filling station is adaptable to different models and sizes of mounted tires even in a mixed process flow, in an automated manner.

Abstract: Rotors, especially elastic rotors, are balanced by measuring unbalance values which provide information regarding the size, or rather the weight of balancing weights and the angular location where these balancing weights are to be secured to the rotor. For obtaining balancing weights an excitation force is applied to the rotor which is at a standstill or which may, but does not have to, rotate when the excitation force is applied by a hammer (11), equipped with a sensor (S) and an output (11A) to provide excitation force spectra. Further sensors (7, 8) are positioned in bearing planes (ME1, ME2) and provide response force spectra. The excitation force spectra and the response force spectra due to the rotating unbalanced rotor are then processed to obtain the unbalance compensating values required for the balancing operation.

Abstract: Vibrations generated by the wheel units of a vehicle are reduced by a low pulsating operation that optimally simulates actual vehicle operating conditions. For this purpose the mass moment of inertia of the wheel unit and of rotating components such as the hub and the brake disc are taken into account. The wheel unit is rotatably mounted on a balancing spindle (2) in a measuring apparatus to determine the mass and angular location of balancing weights (31). The vibrations are measured at a speed that corresponds to a typical travel speed of a vehicle. A loading mechanism including a roller shoe (20) applies a force to the tire tread surface through a spring damping (14, 15) to optimally simulate the conditions of a roadway. The roller shoe (20) has rollers (13) with sections of larger and smaller diameters so that neighboring rollers intermesh. The combined masses of the rollers, as reduced to the roller radius dw, corresponds to the rotational mass of the vehicle wheel as reduced to the tread radius (dR).

Abstract: A test rotor for balancing machines has a plurality of receptacles for test weights. Fitting surfaces are provided beside the receptacles against which fitting surfaces of the test weights are placed. The fitting surfaces for angle positioning are shaped as level surfaces that run in the lengthwise direction of the rotor in order to inexpensively ensure a simple, precise and secure manner for positioning the test weights.

Abstract: The running characteristics of a vehicle wheel with a tire are improved by applying axial pressure with a pressure application ring (26) which temporarily compresses the flanks of a tire (10) to such an extent that a portion of the axially outwardly facing surface of the respective tire bead lifts off from the respective rim flange. This permits the tire bead to press itself, in response to the air pressure in the tire, into the corner formed between a cylindrical portion of the rim and the flange portion of the rim. The ring-shaped pressure application ring (26) comprises a plurality of circumferentially arranged ring sectors (7). These sectors can be adjusted in their radially inwardly or outwardly to thereby adapt the diameter of the pressure application ring for use in connection with a wide range of tire diameters.

Abstract: A method and apparatus quickly and reliably reduce the weight critical flexural amplitude of a flexible rotor having an anisotropic flexural stiffness. Rotor data including the midpoint deflection of a vibration at twice the rotational frequency are measured on the rotating rotor, and a mathematical model is developed, using the measured rotor data, to represent the rotor. Parameters in the dynamic equation of motion in the mathematical model are evaluated in connection with the actual measured data, and thereby the stiffness anisotropy of the rotor is determined by minimizing the difference between the model values and the actual measured values, for example by using the least squares method. Based on the determined anisotropy, compensating data such as machining data for machining the rotor in order to reduce the stiffness anisotropy are calculated.

Abstract: A process masks non-relevant measured values in an unbalance signal consisting of a large number of individual measured values and a circuit arrangement determines the unbalance of a rotatable object in at least one measuring plane with at least one oscillation transducer and one angle position pick-up for processing the unbalance measuring signal. A display device displays the unbalance in terms of position and magnitude and/or a processing device further processes the unbalance, in order for a system based on fuzzy logic to take into account any unexpected interferences during the formation of the unbalance measured value. In the case of greatly deviating individual measured values, a system based on fuzzy logic which recognizes the course of the unbalance measuring signal that can be roughly expected masks these values as non-relevant.