Manufacture of vehicle disc wheels
AssigneeDunlop Limited
InventorAlan Ravenhall
Life of this patent
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Abstract
A method of truing a spigot located disc wheel comprising clamping the wheel between two adaptors, rotating the wheel, measuring the radial displacements at each bead seat, and operating a borer in response to the displacements to bore a central spigot hole in the true center of the wheel.
Claims9
A method of truing a disc wheel of the kind having a rim including a pair of bead seats for supporting the beads of a pneumatic tire and a body portion in the form of a disc having at least one location hole for mounting the wheel, comprising mounting the wheel about an axis, measuring the radial displacements of at least one bead seat region of the rim at a plurality of positions around the rim, calculating the value of the amplitude and phase of the first harmonic of the vibrations generated as a result of the radial displacements and feeding signals corresponding to the amplitude and phase of the first harmonic to a servo positional controlled machine to align the center line of a tool of said machine with the true center of the location hole, and machining the hole to ensure that when the wheel is mounted and located by the hole and rotated, the first harmonic is of small amplitude.
Dependencies are inferred from the claim text.