Method and equipment for controlling a manufacturing process of a component of a tyre for vehicle wheels
AssigneePirelli Tyre S.p.A.
InventorCesare Emanuele Amurri
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Abstract
A method and equipment for controlling a manufacturing process of a component of a tire for vehicle wheels, wherein at least one continuous elongated element fed by a supplying member is placed on a forming support by means of at least one pressing member active on the at least continuous elongated element along an application direction. During the manufacturing of the component of the tire, at successive sampling times Ti, the value Pi of a quantity indicative of the position of the pressing member is acquired along the application direction, where i is an integer greater than or equal to 1, Ti=i*1/f, and f is the sampling frequency.
Claims28
A method for controlling a manufacturing process of a component of a tire for vehicle wheels, wherein at least one continuous elongated element fed by a supplying member is placed on a forming support by means of at least one pressing member active on said at least one continuous elongated element along an application direction, comprising, during the manufacturing of the component of the tire:
- a) acquiring at successive sampling times Ti, a value Pi of a quantity indicative of a position of the pressing member along the application direction, where i is an integer greater than or equal to 1, Ti=i*1/f, and f is a sampling frequency and, at each sampling time Ti;
- b) determining a difference Δi in absolute value between the value of said quantity Pi, at the sampling time Ti, and a value Pi−1 of said quantity at the previous sampling time Ti−1;
- c) determining a value of a mobile sum Si, of M addends with M greater than or equal to 2 and i greater than or equal to M, the M addends representing differences Δi, Δi−1, . . . Δi−M+1, at a current sampling time Ti, and at previous M−1 sampling times Ti−1, . . . i−M+1;
- and
- d) comparing the value of the mobile sum Si, determined with at least one threshold value, wherein, if the value of the mobile sum Si, is greater than said at least one threshold value, at least one of the following is performed:
- generating a warning and/or alarm signal;
- checking for a possible presence of a deposition anomaly of the continuous elongated element on the forming support;
- checking for a possible need to discard the tire with the component being manufactured;
- and automatically stopping the manufacturing process.
Equipment for controlling a manufacturing process of a component of a tire for vehicle wheels, comprising an apparatus for manufacturing said tire component and at least one processor operatively associated with said apparatus, said apparatus comprising:
- a supplying member configured to place a continuous elongated element on a forming support;
- a pressing member active on said continuous elongated element along an application direction so as to press said continuous elongated element on said forming support;
- and
- a detection device operatively coupled with said pressing member and configured to supply a quantity indicative of a position of the pressing member along the application direction during deposition of said continuous elongated element on said forming support;
- wherein said at least one processor is configured to:
- a) acquire, at successive sampling times Ti, a value Pi of said quantity supplied by the detection device, where i is an integer greater than or equal to 1, Ti=i*1/f, and f is a sampling frequency and,
- at each sampling time Ti:
- b) determine a difference Δi in absolute value between the value Pi of said quantity at the sampling time Ti, and a value Pi−1 of said quantity at the previous sampling time Ti−1;
- c) determine a value of a mobile sum Si of M addends with M greater than or equal to 2 and i greater than or equal to M, the M addends representing differences Δi, Δi−1, . . . Δi−M+1, at a current sampling time Ti and at previous M−1 sampling times Ti−1, . . . Ti−M+1;
- and
- d) compare the determined value of the mobile sum Si with at least one threshold value, wherein, if the value of the mobile sum Si is greater than said at least one threshold value, at least one of the following is performed:
- generating a warning and/or alarm signal;
- checking for a possible presence of a deposition anomaly of the continuous elongated element on the forming support;
- checking for a possible need to discard the tire with the component being manufactured;
- and automatically stopping the manufacturing process.
Dependencies are inferred from the claim text.