Abstract: In a device (1) for clamping a rim (2) of a vehicle wheel, at least four clamping elements (3) are provided which can be moved with respect to the rim (2) and comprise clamping arms (5) and support elements (7) having support surfaces (6). A rim flange of the rim (2) can be placed on the support surfaces. The clamping arms (5) are rotatably mounted, about their longitudinal axis, in the clamping elements (3), and have clamping fingers (8) at the end that protrude beyond the support surfaces (6), which fingers have clamping surfaces which can be brought into clamping contact with the placeable rim flange.

Abstract: In a component for connecting a shaft to a clamping holder that can receive a rotor, the clamping holder is able to be inserted into a cup-shaped housing and is able to be fixed there by fasteners. On the housing base of the housing is a connector for connecting the housing to the shaft in a torque-proof manner. The fasteners are arranged with their base surface on the outer lateral surface of the housing, and can be brought into engagement with the clamping holder by bores present in the housing. The fasteners have at least one recess in the base surface, such that they rest with their base surface on the outer lateral surface only in some regions.

Abstract: A device (1) for receiving and clamping a rotor bearing (6) is provided with at least one bearing block (2) lying transversely to a bearing axis of the rotor bearing (6), a bearing element (4) designed to receive the rotor bearing (6), a clamping arm (12), and a locking device (9). The clamping arm (12) has an engagement element (8) by means of which it can be brought into engagement with the rotor bearing (6). The locking device (9) also comprises at least two engagement elements (8) which are radially movable in the bearing element (4) and can be introduced into radial receptacles (14) in the rotor bearing (6) by actuating the locking device (9), such that a rotor bearing (6) which can be received by the bearing element (4) can be clamped by the engagement elements (8) of the clamping arm (12) and the locking device (9).

Abstract: A device for pneumatically driving a rotor in a balancing machine has at least one drive nozzle, which is connectable to a compressed-air line and which serves for generating a driving air stream which can be directed onto the rotor, and at least one braking nozzle, which is connectable to a compressed-air line and which serves for generating a braking air flow. The braking air flow can be directed onto the rotor in a direction opposite to the direction of rotation of the rotor. Also a base plate is arrangeable with a spacing to the rotor and on the base plate, the nozzles are movably arranged, such that the spacing between nozzles and rotor is adjustable.

Abstract: A device (1) for receiving and clamping a rotor bearing (6) is provided with at least one bearing block (2) lying transversely to a bearing axis of the rotor bearing (6), a bearing element (4) designed to receive the rotor bearing (6), a clamping arm (12), and a locking device (9). The clamping arm (12) has an engagement element (8) by means of which it can be brought into engagement with the rotor bearing (6). The locking device (9) also comprises at least two engagement elements (8) which are radially movable in the bearing element (4) and can be introduced into radial receptacles (14) in the rotor bearing (6) by actuating the locking device (9), such that a rotor bearing (6) which can be received by the bearing element (4) can be clamped by the engagement elements (8) of the clamping arm (12) and the locking device (9).

Abstract: A strain of a rotor (2) loaded with centrifugal force is measured, whereby the rotor (2) is introduced into a receiving part of a spin test rig (1) that can be connected to a drive, a camera (4) and a short-term illumination unit (6) are triggered, and at least one region of a surface of the rotor (2) is photographed. This first image is transmitted to an evaluation unit (8) as a starting state. The rotor (2) is accelerated and, at at least one rotational speed, the camera and the short-term illumination unit (6) are triggered again and at least one further image of the previously photographed region of the surface is photographed, which is transmitted to the evaluation unit (8) as a measuring state. The evaluation unit (8) calculates a strain of the rotor (2) in the photographed region of the surface using a digital image correlation, wherein the exposure time of the image sensor of the camera (4) is determined from the duration of the illumination coming from the short-term illumination unit (6).

Abstract: The invention relates to a device for receiving a workpiece in a bearing device for rotatably mounting the workpiece about a bearing axis (L) associated with a workpiece bearing surface. The device comprises a bearing pedestal (14) including a bearing element (1) which has two concavely cylindrical bearing surfaces (5, 6) that lie next to one another in the same bearing plane and symmetrically to a plane of symmetry containing the bearing axis (L), the cylinder radii of the cylindrical bearing surfaces being greater than the radius of the workpiece bearing surface for which the bearing device is intended, wherein the cylinder axes of the two bearing surfaces (5, 6) are parallel to the bearing axis (L) and have a distance between each other.

Abstract: A balancing machine drive apparatus for driving rotational movement of a workpiece rotatably mounted about a rotational axis by a looping belt includes a frame at least partially surrounding, transaxially to the rotational axis, a workpiece mounting position and having an opening closable by an arch and through which the mounting position is accessible, the drive apparatus including guide devices on the frame and/or arch to guide the belt such that, when the arch is closed, the belt winds at least partially around a workpiece in the mounting position on a cylindrical circumferential workpiece region, and a drive device for the belt. The arch is held on the frame so as to be movable between open and closed positions. A balancing machine for balancing a workpiece includes a mounting apparatus in order to rotatably mount the workpiece about a rotational axis in a mounting position, and the drive apparatus.

Abstract: The invention relates to a device for attaching a balancing weight (2) to a mounting surface (17) on an inner side (3) of a rim dish of a wheel rim (4) and provides for a mounting head (1) to be dimensioned in such a way that it fits into the rim dish. The mounting head (1) includes a support element (5), which is radially displaceable relative to the wheel rim (4) and on which a feeler element (6) is axially movably arranged, the feeler element (6) having a convex contact surface (14) and a receptacle (12) for at least one balancing weight (2), said receptacle being oriented towards the inner side (3). The mounting head (1) is configured in such a way that the contact surface (14) may be brought into contact with a boundary surface (18) of the inner side (3), and may be displaced along said boundary surface until the balancing weight (2) comes radially into contact with the mounting surface (17).

Abstract: In a method for determining an equivalent modal unbalance for the first bending characteristic form of a shaft-elastic rotor, which unbalance is to be compensated for, a rotor model is created describing the geometric shape and material properties of the shaft-elastic rotor. The magnitude of compliance of the rotor model is calculated at a measurement point and at the center of gravity of the rotor at an assumed speed. The shaft-elastic rotor is received in a rotatable bearing and accelerated to the assumed speed which is below its first critical speed. Subsequently, the magnitude of outward deflection at the measurement point of the shaft-elastic rotor rotating at the assumed speed can be measured. The equivalent modal unbalance for the first bending characteristic form of the shaft-elastic rotor, which unbalance is to be compensated for, can be calculated from the magnitudes of the calculated compliance and the measured outward deflection.

Abstract: In a device (1) for clamping a rim (2) of a vehicle wheel, at least four clamping elements (3) are provided which can be moved with respect to the rim (2) and comprise clamping arms (5) and support elements (7) having support surfaces (6). A rim flange of the rim (2) can be placed on the support surfaces. The clamping arms (5) are rotatably mounted, about their longitudinal axis, in the clamping elements (3), and have clamping fingers (8) at the end that protrude beyond the support surfaces (6), which fingers have clamping surfaces which can be brought into clamping contact with the placeable rim flange.

Abstract: A balancing device for installing a counterweight in a specified shaft balancing region paired with a balancing plane includes a securing device which can be controlled via a control unit. The securing device has a first and a second receiving area for a counterweight or the shaft at a free end. A slot is arranged on the balancing device such that the balancing device can be moved along the shaft in the axial direction. The balancing device has a sensor for ascertaining the position of the balancing device relative to the shaft. The balancing device further includes a display unit which is connected to the control unit so as to exchange data and which is designed such that the position of the balancing device relative to the balancing region can be displayed.

Abstract: A method is described for calibrating a balancing machine, in which a rotor (1) to be corrected is rotatably mounted in bearings (2) and a correction run k is performed, wherein at least one measuring sensor (3) determines an initial vibration of the rotor (1) prior to an imbalance correction and transmits this vibration to an evaluation device (4), which stores the measured value as vibration vector {right arrow over (s)}0. After an imbalance on the rotor (1) is corrected, a residual vibration of the rotor (1) is measured by measuring sensor (3), transmitted to the evaluation unit (4) and stored as vibration vector {right arrow over (s)}1. The difference ?{right arrow over (s)}={right arrow over (s)}1?{right arrow over (s)}0 formed from the measurement data and the corrected imbalance is stored for compensation run k as ?{right arrow over (s)}k and {right arrow over (u)}k by the evaluation unit (4).

Abstract: In a method for identifying an unbalance correction for flexible rotors (1), the rotor (1) is rotatably mounted in two bearing devices. An RPM sensor (4) records the speed of the rotor (1) and a radial movement of the rotor (1) is recorded, by means of position sensors (3) at measuring points (6), during an unbalance measurement run or a plurality of unbalance measurement runs for different rotor speeds. The measured values recorded are fed to an evaluation device (5), which determines the eccentricity measured values assigned to the measuring points (6) by means of expanding the influence coefficient method, and therefore unbalances are determined per plane and eccentricities are determined per measuring point for each measurement run.

Abstract: A protective housing for a testing, measuring or production device has a protective element, which seals a housing opening and is held and guided by guide devices and can be moved into an open position by a drive device. The guide devices have arched sections which are outwardly curved forward and extend backwards in a straight line on an upper side of the protective housing. The protective element includes two flexurally stiff rectangular plates, which have straight longitudinal sides and a curve approximating the arched sections and are connected to each other on a longitudinal side via a hinge. The guide devices include a number of guide elements guided on a guide rail, wherein a respective guide element is arranged on the hinge and further guide elements are arranged on both sides of the hinge. The drive device drives the rearmost guide element via two traction transmissions, which have traction mechanisms running parallel to the straight section of the guide devices.

Abstract: In a method for determining an equivalent modal unbalance for the first bending characteristic form of a shaft-elastic rotor, which unbalance is to be compensated for, a rotor model is created describing the geometric shape and material properties of the shaft-elastic rotor. The magnitude of compliance of the rotor model is calculated at a measurement point and at the center of gravity of the rotor at an assumed speed. The shaft-elastic rotor is received in a rotatable bearing and accelerated to the assumed speed which is below its first critical speed. Subsequently, the magnitude of outward deflection at the measurement point of the shaft-elastic rotor rotating at the assumed speed can be measured. The equivalent modal unbalance for the first bending characteristic form of the shaft-elastic rotor, which unbalance is to be compensated for, can be calculated from the magnitudes of the calculated compliance and the measured outward deflection.

Abstract: A method is described for calibrating a balancing machine, in which a rotor (1) to be corrected is rotatably mounted in bearings (2) and a correction run k is performed, wherein at least one measuring sensor (3) determines an initial vibration of the rotor (1) prior to an imbalance correction and transmits this vibration to an evaluation device (4), which stores the measured value as vibration vector {right arrow over (s)}0. After an imbalance on the rotor (1) is corrected, a residual vibration of the rotor (1) is measured by measuring sensor (3), transmitted to the evaluation unit (4) and stored as vibration vector {right arrow over (s)}1. The difference ?{right arrow over (s)}={right arrow over (s)}1-{right arrow over (s)}0 formed from the measurement data and the corrected imbalance is stored for compensation run k as ?{right arrow over (s)}k and {right arrow over (u)}k by the evaluation unit (4).

Abstract: The invention relates to a device for attaching a balancing weight (2) to a mounting surface (17) on an inner side (3) of a rim dish of a wheel rim (4) and provides for a mounting head (1) to be dimensioned in such a way that it fits into the rim dish. The mounting head (1) includes a support element (5), which is radially displaceable relative to the wheel rim (4) and on which a feeler element (6) is axially movably arranged, the feeler element (6) having a convex contact surface (14) and a receptacle (12) for at least one balancing weight (2), said receptacle being oriented towards the inner side (3). The mounting head (1) is configured in such a way that the contact surface (14) may be brought into contact with a boundary surface (18) of the inner side (3), and may be displaced along said boundary surface until the balancing weight (2) comes radially into contact with the mounting surface (17).

Abstract: In a method for identifying an unbalance correction for flexible rotors (1), the rotor (1) is rotatably mounted in two bearing devices. An RPM sensor (4) records the speed of the rotor (1) and a radial movement of the rotor (1) is recorded, by means of position sensors (3) at measuring points (6), during an unbalance measurement run or a plurality of unbalance measurement runs for different rotor speeds. The measured values recorded are fed to an evaluation device (5), which determines the eccentricity measured values assigned to the measuring points (6) by means of expanding the influence coefficient method, and therefore unbalances are determined per plane and eccentricities are determined per measuring point for each measurement run.

Abstract: The invention relates to a device for receiving a workpiece in a bearing device for rotatably mounting the workpiece about a bearing axis (L) associated with a workpiece bearing surface. The device comprises a bearing pedestal (14) including a bearing element (1) which has two concavely cylindrical bearing surfaces (5, 6) that lie next to one another in the same bearing plane and symmetrically to a plane of symmetry containing the bearing axis (L), the cylinder radii of the cylindrical bearing surfaces being greater than the radius of the workpiece bearing surface for which the bearing device is intended, wherein the cylinder axes of the two bearing surfaces (5, 6) are parallel to the bearing axis (L) and have a distance between each other.