Azimuth Control for Tire Bead Wire Join Separation

Solution Overview

Problem

The existing method for manufacturing bead wires can result in irregularities, imbalances, and zones of weakness due to the proximity of the braid join and core join, leading to potential surface irregularities and mechanical instability in tire reinforcement.

Innovation Solution

An installation with an azimuth checking system that detects and positions the core and braid wire joins to ensure they are at distinct angular sectors, preventing overlap and ensuring a sufficient separation distance to avoid concentration of joins and subsequent weaknesses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the braid join and core join are positioned close together during bead wire manufacturing, then the manufacturing process is simpler and faster, but it creates zones of weakness, surface irregularities, and imbalances in the bead wire structure

Engineering Contradiction:

Improvemanufacturing speedVSAvoidbead wire quality

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system performs preliminary positioning of the core and detection of the core join location before the braiding operation begins. By pre-determining the angular position of the core join and using this information to control the braiding process, the system ensures that the braid join will be positioned at an optimal distance from the core join, preventing zone of weakness formation while maintaining manufacturing efficiency

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system incorporates a detection device that senses the angular position of the core join during the braiding process. This feedback information is used to control the braiding operation and determine when to form the braid join, ensuring proper spacing between joins while maintaining continuous manufacturing flow

Inventive Principle:

Principle #23Feedback

2Device complexity

If the braid join and core join are positioned close together, then the manufacturing process requires less space and time, but it creates significant surface irregularities and cross-sectional irregularities of the core

Engineering Contradiction:

Improveprocess simplicityVSAvoidsurface regularity

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The system performs preliminary positioning of the core and detection of the core join location before the braiding operation begins. By pre-determining the angular position of the core join and using this information to control the braiding process, the system ensures that the braid join will be positioned at an optimal distance from the core join, preventing zone of weakness formation while maintaining manufacturing efficiency

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system incorporates a detection device that senses the angular position of the core join during the braiding process. This feedback information is used to control the braiding operation and determine when to form the braid join, ensuring proper spacing between joins while maintaining continuous manufacturing flow

Inventive Principle:

Principle #23Feedback

3Productivity

If the braid join and core join are positioned close together, then the manufacturing process is more efficient, but it creates imbalances in the bead wire structure

Engineering Contradiction:

Improveproduction efficiencyVSAvoidbead wire balance

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The system performs preliminary positioning of the core and detection of the core join location before the braiding operation begins. By pre-determining the angular position of the core join and using this information to control the braiding process, the system ensures that the braid join will be positioned at an optimal distance from the core join, preventing zone of weakness formation while maintaining manufacturing efficiency

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system incorporates a detection device that senses the angular position of the core join during the braiding process. This feedback information is used to control the braiding operation and determine when to form the braid join, ensuring proper spacing between joins while maintaining continuous manufacturing flow

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12036758B2System and method with azimuth control, for sorting tire bead cores

Publication Date: 2024.07.16 MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)

AI summary

The method includes procuring an annular core 3 of main axis Z3. The core is closed on itself by a core join 6 which occupies, in azimuth about said main axis Z3, a first angular sector S6. Then, a braiding is performed by helically winding, about the core 3, a braid wire 4 that is held closed by a braid join 8, of sleeve 9 type, which occupies a second angular sector S8. A method during which a registration element 16, with respect to which the position of the first angular sector S6 is known, is sought and detected on the core 3, and the azimuthal orientation of the core 3 is adapted during the braiding, with reference to said registration element 16, so that the second angular sector S8 occupied by the braid join 8 does not overlap the first angular sector S6 occupied by the core join 6.