Seaming Shaft Sensing for Real-Time Can Lid Defect Detection
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Solution Overview
Problem
Conventional can sealing processes fail to detect errors and defects in real-time, such as 'skidders' and wear of seaming means, due to indirect monitoring methods that only analyze the last can rotation and are prone to delays and inaccuracies.
Innovation Solution
A seaming shaft mechanism with sensors arranged on the seaming shaft to monitor displacement and torsion, allowing for continuous and real-time detection of seaming forces, enabling precise identification of errors and wear by measuring force and strain trends directly at the seaming shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If indirect monitoring methods are used to analyze the last can rotation, then the monitoring system is simpler, but the detection accuracy and real-time capability deteriorate
Solution Approach 1:
The patent introduces a magnetic sensor as an intermediary element that indirectly measures seaming forces by detecting changes in the magnetic field caused by shaft displacement and torsion. This mediator allows the system to monitor seaming quality without direct contact with the seaming rollers, maintaining system simplicity while achieving high measurement precision through field-based detection
Solution Approach 2:
The patent replaces direct mechanical measurement systems with a magnetic field-based sensing system. Instead of using complex mechanical sensors that directly contact the seaming mechanism, the invention uses magnetic sensors to detect shaft position and rotation, converting mechanical parameters into electrical signals for analysis, thereby reducing mechanical complexity while improving measurement accuracy
2Measurement precision
If sensors are arranged on the seaming shaft to monitor displacement and torsion, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The patent makes the magnetic sensor system multi-functional by using it to simultaneously measure both shaft displacement and shaft torsion during the seaming process. A single sensor arrangement provides multiple measurement capabilities, reducing the overall number of sensors needed while maintaining high measurement precision for both parameters
Solution Approach 2:
The patent changes the measurement parameters from direct force measurement to indirect magnetic field detection. By monitoring changes in magnetic field strength and orientation caused by shaft displacement and torsion, the system achieves precise measurement of seaming forces without requiring complex force sensors, thereby improving measurement precision while managing device complexity
3Reliability
If the entire seaming process is analyzed, then the reliability of defect detection improves, but the loss of time for data processing increases
Solution Approach 1:
The patent implements real-time feedback monitoring where the magnetic sensor continuously measures shaft displacement and torsion throughout the entire seaming process, and the control system immediately analyzes these parameters to detect defects. This continuous feedback loop ensures high detection reliability by monitoring all seaming operations while maintaining real-time response, preventing delays in defect identification
Solution Approach 2:
The patent ensures continuous monitoring of the seaming process by keeping the magnetic sensor active throughout the entire shaft rotation and seaming operation. This continuous measurement approach captures all relevant data without interruption, improving detection reliability by never missing potential defects, while the efficient signal processing maintains acceptable data processing times
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 solution allows for the real-time detection of seaming defects and wear, reducing machine downtime and product rejects by analyzing the entire seaming process, providing more accurate monitoring compared to existing methods.
Implementation Method 1
A sensor, in particular a magnetic sensor, for the monitoring of a seaming process during the attaching of a can lid (101) to a can body (100) via a measuring of a displacement of the seaming shaft (3) relative to a seaming axis (X) and/or via measuring of a torsion of the seaming shaft (3), in that the sensor is arranged at the seaming shaft (3) in such a way that the seaming process can be monitored by the sensor via a measuring of a displacement of the seaming shaft (3) relative to the seaming axis (X) and/or via measuring of a torsion of the seaming shaft (3)
Data Source
AI summary
A seaming shaft mechanism for a sealer for the attaching of a can lid to a can body includes a seaming shaft rotatable around a seaming axis, a seamer arranged at one end of the seaming shaft; as well as a sensor for the monitoring of the seaming process during the attachment of the can lid to the can body. The sensor is arranged at the seaming shaft such that the seaming process can be monitored by the sensor via a measurement of a displacement of the seaming shaft relative to the seaming axis or via a measurement of a torsion of the of the seaming shaft.