Shearographic Tire Inspection Machine Automatic Alignment
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Solution Overview
Problem
Conventional shearographic tire inspection machines experience high 'dead' times and low throughput due to manual handling and alignment processes, which result in inefficient use of machine operation time.
Innovation Solution
A shearographic tire inspection machine with a sealable enclosure and conveyor system that automatically aligns and positions tires for inspection, using a rotatable shearographic assembly and conveyor strips to facilitate rapid and efficient scanning of tire surfaces under varying pressure conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual handling and alignment processes are used for tire inspection, then ease of operation is maintained, but productivity is reduced due to high dead time and low throughput
Solution Approach 1:
The system enables automatic self-alignment of the tire on the rotating table using gravity and geometric constraints, eliminating the need for manual positioning. The tire naturally centers itself on the tilted table, and the automated conveyor system handles loading and unloading without operator intervention, significantly improving throughput while maintaining operational simplicity
Solution Approach 2:
The table is pre-configured with a tilt angle that automatically guides the tire into the correct position during the loading process. The enclosure and conveyor system are arranged in advance to facilitate seamless automatic handling, so that when the tire enters the enclosure, it is already positioned for optimal inspection without requiring manual adjustment
2Measurement precision
If a rotatable shearographic assembly is used to scan multiple portions of the tire, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The single rotatable shearographic assembly serves multiple functions by scanning different portions of the tire during rotation. This one component performs the work of multiple fixed inspection stations, enabling comprehensive defect detection across the entire tire surface while avoiding the complexity of multiple separate inspection systems
Solution Approach 2:
The shearographic assembly is made dynamically rotatable to adapt its inspection position, allowing it to scan various portions of the tire as needed. This dynamic positioning capability enables comprehensive coverage with a single component rather than requiring multiple static inspection stations, balancing measurement precision with manageable device complexity
3Productivity
If conveyor strips are used to automatically move the tire, then productivity is improved, but device complexity increases
Solution Approach 1:
The conveyor system is segmented into multiple independent strips rather than using a single complex conveyor mechanism. This segmentation allows each strip to perform a specific function (loading, positioning, unloading) independently, simplifying the overall system while achieving automated handling. The modular nature of segmented conveyors makes them easier to maintain and control compared to monolithic conveyor systems
Solution Approach 2:
The conveyor strips act as intermediaries between the external tire supply and the inspection enclosure. They provide a simple mechanical bridge that automatically transfers tires without requiring complex robotic manipulators or automated guided vehicles, achieving productivity improvement through relatively simple intermediary transport elements
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system significantly reduces machine dead time and increases throughput by enabling automatic loading, alignment, and scanning of tires, allowing for continuous operation and improved inspection efficiency.
Implementation Method 1
The technique of shearing interferometry, a process which is commonly referred to as shearography, typically involves the interference of two laterally displaced images of the same object to form an interference image
Implementation Method 2
Most tire defects, such as material layer separation, will result in air being trapped within the tire material. This trapped air will cause bulges to appear when the tire is subjected to a vacuum
Data Source
AI summary
A tire inspection machine includes an incoming conveyor adapted to transport tires to the machine and also align the tires in a transverse direction. An inspection table of the machine includes a table conveyor system that is responsive to a controller. The table and table conveyor are together arranged to permit scanning of both sidewall portions of a tire disposed thereon. A sensor detects a longitudinal position of the tire and stops the table conveyor when the tire is longitudinally aligned. A controller operates the table conveyor based on the longitudinal position of the tire.