Winding Device Parameter Adaptation via Stress-Strain Diagram
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Solution Overview
Problem
Current methods for adjusting winding parameters of film webs onto winding cores are time-consuming and prone to errors due to reliance on laboratory determinations and empirical values, lacking real-time feedback on actual conditions during the winding process.
Innovation Solution
A method involving a measuring section between two driven rollers to detect torque and peripheral speed, generating a stress-strain diagram to adapt winding parameters for defined stretching, allowing for real-time adjustment of web tension and other parameters within the winding device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If winding parameters are adjusted based on laboratory determinations and empirical values, then winding quality can be controlled, but the process is time-consuming and prone to errors due to lack of real-time feedback
Solution Approach 1:
The patent implements real-time feedback by continuously measuring actual web tension during winding using sensors and comparing it with target values. The control system automatically adjusts winding parameters based on this feedback, eliminating the need for time-consuming laboratory determinations and providing immediate correction of deviations, thus resolving the contradiction between maintaining winding quality and reducing adjustment time
Solution Approach 2:
The winding device performs self-adjustment of winding parameters through automated control based on real-time measurements. The system monitors its own operation, detects deviations in web tension, and automatically corrects them without requiring external laboratory testing or empirical adjustments by operators, thereby reducing time loss while maintaining precision
2Manufacturing precision
If winding parameters are adjusted based on laboratory determinations and empirical values, then winding quality can be controlled, but errors still occur due to lack of information about actual conditions during winding
Solution Approach 1:
Real-time feedback from sensors measuring actual web tension during winding provides accurate information about actual conditions. This feedback loop enables the control system to detect and correct deviations immediately, ensuring reliable parameter settings that reflect actual winding conditions rather than relying on potentially inaccurate laboratory data or empirical values
Solution Approach 2:
The patent replaces manual empirical adjustment methods with automated sensor-based measurement and control systems. Electronic sensors and control algorithms substitute for human judgment and laboratory determination, providing more reliable and objective parameter setting based on actual real-time conditions during the winding process
3Measurement precision
If web tension is increased between two driven rollers to measure stress-strain characteristics, then accurate material parameters can be determined, but the film web may be damaged or deformed
Solution Approach 1:
The system applies web tension that is sufficient to obtain accurate stress-strain measurements but controlled to remain within elastic limits. By using partial action (measuring only the necessary portion of the stress-strain curve without exceeding safe limits), the patent achieves measurement precision while preventing film damage through careful control of the applied tension magnitude
Solution Approach 2:
The control system monitors web tension in real-time and prevents it from exceeding maximum safe limits that could cause film damage. By establishing predetermined safety thresholds and automatically limiting the tension applied during measurement, the system cushions against potential damage while still obtaining sufficient measurement data for accurate stress-strain diagrams
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
Enables precise and efficient optimization of winding parameters, reducing errors and time delays by accounting for real environmental conditions, achieving consistent winding quality across different film qualities and loads.
Implementation Method 1
This power transmission takes place through frictional contact between the foil web and the surface of the respective roll.
Implementation Method 2
The increased force in the film web caused by the increased web tension leads to a change in the elastic or plastic stretching of the film web along the measuring section.
Implementation Method 3
The increased force in the film web caused by the increased web tension leads to a change in the elastic or plastic stretching of the film web along the measuring section.
Data Source
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AI summary
The invention relates to a method for adapting at least one winding parameter (WP) of a winding device (100) during winding of a film web (200) on a core (110), having the following steps: - conveying of the film web (200) along a measuring path (M) between a first driven roll (20) and a second driven roll (30), - increasing of the web tension of the film web (200) between the first roll (20) and the second roll (30), - continuous detecting of the drive parameters (AP) of the first roll (20) and of the second roll (30) at least in the form of the torque and the circumferential speed, - determining of a stress-strain diagram (300) from the detected drive parameters (AP), - adapting of at least one winding parameter (WP) of the winding device (100) on the basis of the determined stress-strain diagram (300) in order to achieve a defined elongation (310) of the film web (200) during winding on the core (110).