A process for manufacturing a hollow roller of a roller bearing including steps of: machining an outer radial cylindrical surface, with a circular cross section centered on a first axis, and machining an inner radial cylindrical surface with a circular cross section centered on a second axis. These two steps are realized on the same lathe. The hollow roller is provided with the outer radial cylindrical surface, with a diameter of at least 5 mm, and the inner radial cylindrical surface. An offset between the first axis and the second axis, measured in the hollow roller between two axial surfaces of the hollow roller, is less than 2 m, and an inclination angle between the first axis and the second axis is less than one minute of angle. The roller bearing comprises amongst others, at least one such hollow roller.

A process for manufacturing a hollow roller of a roller bearing including steps of: machining an outer radial cylindrical surface, with a circular cross section centered on a first axis, and machining an inner radial cylindrical surface with a circular cross section centered on a second axis. These two steps are realized on the same lathe. The hollow roller is provided with the outer radial cylindrical surface, with a diameter of at least 5 mm, and the inner radial cylindrical surface. An offset between the first axis and the second axis, measured in the hollow roller between two axial surfaces of the hollow roller, is less than 2 m, and an inclination angle between the first axis and the second axis is less than one minute of angle. The roller bearing comprises amongst others, at least one such hollow roller.

A system and method for grinding the exterior of a shaft part with rotationally symmetrical sections and bases which have centering bores and which define a reference longitudinal axis and rotational axis of the shaft part. The shaft part is held between tips which engage into the centering bores during the grinding process using a grinding disk, and the shaft part is additionally supported on the rotationally symmetrical sections by means of a support device. The current diameter values of the rotationally symmetrical sections are measured and transmitted to a controller, by means of which the support device is updated with respect to the measured diameter values while continuously supporting the rotationally symmetrical sections until target dimensions are achieved.

A system and method for grinding the exterior of a shaft part with rotationally symmetrical sections and bases which have centering bores and which define a reference longitudinal axis and rotational axis of the shaft part. The shaft part is held between tips which engage into the centering bores during the grinding process using a grinding disk, and the shaft part is additionally supported on the rotationally symmetrical sections by means of a support device. The current diameter values of the rotationally symmetrical sections are measured and transmitted to a controller, by means of which the support device is updated with respect to the measured diameter values while continuously supporting the rotationally symmetrical sections until target dimensions are achieved.

The present invention relates to a size-adjustable online wheel deburring device, which comprises a synchronous clamping and rotating system and two brush adjustment systems which are in bilateral symmetry. When in use, the synchronous clamping and rotating system enables a wheel to rotate in a clamped state, and the diameter of the wheel is detected; driving cylinders enable spline shafts to rise so as to enable jacking blocks to be matched with gears II, and servo motors drive the gears II to rotate through synchronizing belts I; a left brush and a right brush are separately adjusted to appropriate positions through a left gear rack and a right gear rack; the driving cylinders enable the spline shafts to fall so as to enable the jacking blocks to be separated from the gears II; the servo motors drive flange brushes to rotate through the synchronizing belts I and synchronizing belts II; belt pulleys IV guarantee that the synchronizing belts II are always in a tensioned state after the left brush and the right brush are adjusted to the appropriate positions; oblique motors drive oblique brushes to rotate; and a drive motor I enables the brush adjustment systems which are in bilateral symmetry to rotate through a driving shaft, two lifting cylinders lift the wheel through guide posts, and the aim of deburring can be achieved when each brush is in contact with a back cavity of the wheel.

Through the following steps (a) and (b), the side surface of a grinding object is ground to manufacture a ground product having a smaller diameter than that of the grinding object. In the step (a), a cup type grinding stone is disposed such that the central axis is parallel offset from a state where the central axis is orthogonal to the central axis of the grinding object. In the step (b), the cup type grinding stone is axially rotated so that the cup type grinding stone grinds the side surface of the grinding object while the grinding object is axially rotated and moved in the axial direction. Thereby, the outer peripheral surface of the grinding object is finish-ground by the bottom grinding stone portion of the cup type grinding stone while the grinding object is rough-ground by the side grinding stone portion to obtain a ground product.

The present invention relates to a method and a device for processing a hard-coated workpiece surface of a rotationally symmetrical workpiece (1) with at least one grinding wheel, wherein the method comprises the following steps: driving the workpiece (1) into a rotational motion around a workpiece axis of rotation (1.1), driving a grinding wheel (2a) into a rotational motion around a grinding wheel axis of rotation (2a.1), angulating the grinding wheel axis of rotation (2a.1) and the workpiece axis of rotation (1.1) to each other so that the grinding wheel axis of rotation (2a.1) and the workpiece axis of rotation (1.1) are not parallel, processing the workpiece surface with the grinding wheel (2a), wherein the grinding wheel (2a) is in contact with the workpiece surface.

The present invention relates to a method and a device for processing a hard-coated workpiece surface of a rotationally symmetrical workpiece (1) with at least one grinding wheel, wherein the method comprises the following steps: driving the workpiece (1) into a rotational motion around a workpiece axis of rotation (1.1), driving a grinding wheel (2a) into a rotational motion around a grinding wheel axis of rotation (2a.1), angulating the grinding wheel axis of rotation (2a.1) and the workpiece axis of rotation (1.1) to each other so that the grinding wheel axis of rotation (2a.1) and the workpiece axis of rotation (1.1) are not parallel, processing the workpiece surface with the grinding wheel (2a), wherein the grinding wheel (2a) is in contact with the workpiece surface.

A method for manufacturing a rotor includes the following operations: the clamping of a workpiece in a grinding machine; the performance of one or more cylindrical grinding operations whereby a rotor shaft section is ground to the desired diameter with a cylindrical grinding disk; the performance of one more profile grinding operations whereby a rotor body is profiled with a profile grinding disk. During the manufacture of the rotor in the grinding machine, the workpiece is not undamped and the cylindrical grinding operations and the profile grinding operations are done with the same grinding machine.

A method for manufacturing a rotor includes the following operations: the clamping of a workpiece in a grinding machine; the performance of one or more cylindrical grinding operations whereby a rotor shaft section is ground to the desired diameter with a cylindrical grinding disk; the performance of one more profile grinding operations whereby a rotor body is profiled with a profile grinding disk. During the manufacture of the rotor in the grinding machine, the workpiece is not undamped and the cylindrical grinding operations and the profile grinding operations are done with the same grinding machine.