Creping Blade Vibration Scoring for Chatter Control
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Solution Overview
Problem
The creping process in tissue manufacturing is hindered by excessive vibration of the creping doctor blade, leading to chatter conditions that result in product defects and machine downtime, while also causing potential damage to the Yankee dryer surface.
Innovation Solution
A method is introduced to track and analyze data associated with the creping process, specifically by measuring vibration data, assigning scores based on comparisons to previous data, and generating an index score to facilitate maintenance and optimize machine performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vibration sensors continuously monitor creping blade vibration to detect chatter conditions, then product quality and machine reliability improve, but data complexity and analysis difficulty increase
Solution Approach 1:
The patent replaces complex mechanical vibration analysis with an acoustic emission sensing system that converts vibration signals into acoustic signals for processing. The acoustic emission sensor detects high-frequency stress waves generated by chatter conditions, transforming the problem from mechanical vibration measurement to acoustic signal analysis, which simplifies the overall system complexity while maintaining detection capability
Solution Approach 2:
The patent changes the measurement parameter from general vibration amplitude to specific acoustic emission characteristics (high-frequency stress waves). By focusing on the acoustic signature of chatter rather than overall vibration levels, the system achieves more reliable detection with simpler analysis, as acoustic emission parameters provide direct indication of chatter conditions without requiring complex vibration signal processing
2Productivity
If the creping doctor blade continues to operate through wear, then productivity is maintained, but the risk of chatter and Yankee dryer damage increases
Solution Approach 1:
The patent implements preliminary detection of chatter conditions through acoustic emission monitoring before they escalate to severe vibrations that could damage the Yankee dryer. By detecting early signs of chatter in the acoustic signal, the system allows for proactive blade replacement or parameter adjustment, preventing harmful vibrations while maintaining production continuity
Solution Approach 2:
The patent establishes a feedback loop where acoustic emission sensors continuously monitor the creping process, and when chatter conditions are detected, the system provides immediate feedback to operators or control systems. This enables real-time adjustments to operating parameters or blade replacement decisions, balancing productivity maintenance with prevention of Yankee dryer damage
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
This approach reduces the complexity of creping data, enabling more efficient maintenance and higher quality product output by predicting blade replacement needs and preventing damage to the Yankee dryer.
Implementation Method 1
measuring vibration of a creping blade using one or more vibration sensors
Data Source
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AI summary
The disclosure is directed to techniques for tracking data associated with a creping process. The techniques include measuring process data, wherein the process data includes vibration data, and wherein measuring process data includes measuring vibration data of a creping blade using one or more vibration sensors. The techniques further include assigning a score for the process data, including assigning a vibration score for the vibration data. The techniques also include generating an index score based on the score for the process data and the vibration score for the vibration data.