Milling Rotor Bit Wear Tracking for Irregular Surface Patterns
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Solution Overview
Problem
Existing systems for determining part wear in ground-engaging tools, such as those used in road milling machines, often inaccurately assess wear patterns due to irregular wear on different surfaces, leading to premature or delayed replacement, resulting in decreased productivity and increased maintenance costs.
Innovation Solution
A system comprising processors and computer-readable media that receive sensor data from wear surfaces, process it using a wear processing system, and provide indications for replacement, including moving the part to a replaceable orientation, ensuring accurate wear assessment and timely replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If distance measurement techniques are used to quantify wear, then wear can be measured, but the measurement may not accurately reflect actual wear patterns due to irregular wear at different surfaces
Solution Approach 1:
The system segments the wear assessment by measuring multiple specific surfaces (first surface, second surface, third surface) separately rather than taking a single overall measurement. Each surface measurement is evaluated independently to determine if it exceeds replacement thresholds, allowing accurate detection of irregular wear patterns across different parts of the milling rotor bit.
Solution Approach 2:
The system transitions from single-point distance measurement to multi-surface dimensional assessment. By measuring distances across multiple surfaces and comparing each to its respective threshold, the system creates a comprehensive wear profile that captures the complexity of irregular wear patterns rather than relying on a single scalar distance value.
2Ease of operation
If manual inspection of wear parts is performed, then replacement decisions can be made, but productivity decreases and maintenance costs increase due to frequent manual checks
Solution Approach 1:
The system enables self-service wear monitoring where the milling rotor bit's own surfaces are measured and evaluated automatically. The sensor system and processing unit continuously assess wear conditions without requiring manual intervention, allowing the equipment to monitor itself and trigger replacement only when necessary, thereby maintaining productivity while ensuring timely maintenance.
Solution Approach 2:
The system replaces manual mechanical inspection with automated optical or sensor-based measurement. Instead of operators physically examining wear surfaces, a sensor system captures surface data and a processing unit automatically compares measurements against thresholds, eliminating the need for frequent manual checks and improving operational efficiency.
3Reliability
If parts are replaced based on conservative estimates, then equipment reliability is maintained, but unnecessary replacements increase leading to higher maintenance costs
Solution Approach 1:
The system implements feedback-based replacement decision-making where actual wear measurements from multiple surfaces are continuously monitored and compared against scientifically determined replacement thresholds. This feedback loop ensures parts are replaced based on actual wear conditions rather than conservative estimates, maintaining reliability by replacing parts only when they truly need replacement while avoiding unnecessary replacements.
Solution Approach 2:
The system changes the decision parameter from conservative time-based or usage-based replacement schedules to actual measured wear parameters. By using specific surface distance measurements and comparing them to threshold values, the system transitions from preventive replacement of all parts to condition-based replacement of only those parts that have actually reached wear limits.
Data Source
AI summary
A method for determining part wear, such as using a wear model, includes receiving, from a sensor, sensor data representing a surface of a wear part. The method further includes determining an estimated time until the part should be replaced. The method further includes batching together multiple wear parts that need replacing to enable a user to replace multiple parts in one maintenance period. The method may also include providing information to the user during replacement of a worn part to indicate the part location.