Method and apparatus for controlling tyres

Abstract

An apparatus (1 ) for controlling tyres comprises a support plane (2) configured for receiving a tyre (3) with axial middle line plane (4) parallel to the support plane, defining an abutted lateral portion (10a) and a free lateral portion (10b) arranged at a specific height with respect to the support plane. A thrust element (23) is configured for applying, to a measurement surface of the free lateral portion (10b), a force (F) directed towards the support plane. A positioning actuator (19) is operatively associated with the thrust element (23) and configured for moving the thrust element (23) with at least one motion component perpendicular to a rotation axis (X) of the tyre. The apparatus also comprises devices for modifying the angular position of the measurement surface. A control unit is programmed for detecting a first value (U1 ) of output data at each position of the measurement surface as a function of a first value (11 ) of input data maintained substantially constant along at least one complete rotation of the measurement surface around the rotation axis (X) and for detecting a second value (U2) of the output data at each position of the measurement surface. The second value (U2) of the output data corresponds with a second value (I2) of the input data maintained substantially constant along at least one complete rotation of the measurement surface. The control unit comprises a module programmed for calculating, at each position of the measurement surface, a difference (D) between the second value (U2) of the output data and the first value (U1 ) of the output data.

Description

technical field [0001] The subject of the invention is a method and a device for controlling tyres. Background technique [0002] The tire manufacturing cycle is used to obtain and / or assemble the various components of the tire processed in one or more construction lines, and then subject the green tire to a molding and vulcanization process adapted according to the desired The geometry and tread pattern define the tire structure. [0003] When molded and vulcanized, the tire is defined by a toroidal structure wound around an axis of rotation and substantially symmetrical with respect to an axial midline plane perpendicular to said axis of rotation. In particular, the toroidal structure comprises: a crown portion arranged substantially perpendicular to the axial midline plane and in the radially outer region of the tyre; two fixed portions arranged in the tire in the radially inner region of and respectively located on opposite sides of the axial centerline plane; and two ...

AI Technical Summary

Problems solved by technology

[0017] The applicant has also noticed that the application of automatic control on tires of the type described in US2006 / 0272408 and JP2008190981 is able to improve the objectivity of the control itself, but does not ensure the measurement accuracy and repeatability

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