Sensor Roll-Forming Stand for Early Profile Deviation Detection
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Solution Overview
Problem
Conventional roll-forming systems lack early detection of deviations from target profiling, leading to increased rejects and operational inefficiencies due to the inability to promptly identify issues such as bearing damage, sheet thickness changes, and misalignment, resulting in unnecessary costs and downtime.
Innovation Solution
A roll-forming system equipped with at least one sensor roll-forming stand that measures force, vibration, or torque, utilizing a microprocessor unit with a detector algorithm to compare sensor signals against predetermined values and tolerance ranges, allowing for immediate detection of deviations and enabling preventive diagnosis through pattern recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If periodic measurement at the end of the roll-forming system is used, then manufacturing precision is maintained, but loss of time increases and productivity decreases
Solution Approach 1:
The sensor roll-forming stand performs measurements at an intermediate position during the roll-forming process, before the final profiling stage. This preliminary detection allows early identification of deviations, enabling timely corrections without waiting for end-of-line measurement, thus maintaining precision while improving productivity
2Manufacturing precision
If roll-forming stands are distributed over a length of 3 meters or longer, then manufacturing precision can be maintained through multiple adjustment points, but loss of time increases due to delayed detection of initial frame adjustments
Solution Approach 1:
By placing the sensor stand at an intermediate position rather than at the very end of the distributed roll-forming system, the measurement action is performed preliminarily. This allows detection of alignment deviations from initial frames much earlier than traditional end-point measurement, reducing detection delay while maintaining the precision benefits of distributed adjustment points
3Device complexity
If conventional measurement systems are used, then device complexity is kept low, but reliability of early detection decreases
Solution Approach 1:
The measurement system is segmented into a dedicated sensor roll-forming stand that is integrated at a specific intermediate position in the process flow. This segmentation allows the sensor stand to perform specialized measurement functions independently, improving detection reliability without requiring complete system redesign or excessive complexity
Solution Approach 2:
The sensor roll-forming stand acts as an intermediary measurement device between the initial frames and the final profiling stages. This intermediary position enables early detection of deviations while maintaining a relatively simple device structure that integrates with the existing roll-forming system
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 enables early detection of process deviations, reducing rejects and service intervals, allowing for timely adjustments and cost savings by identifying issues before they cause significant problems, such as bearing damage or sheet thickness changes, and optimizing the detection algorithm for improved accuracy.
Implementation Method 1
at least one sensor, which is arranged in the respective sensor roll-forming stand to measure a force, a vibration or a torque exerted on the metal sheet by the respective sensor roll-forming stand
Implementation Method 2
at least one sensor, which is arranged in the respective sensor roll-forming stand to measure a force, a vibration or a torque exerted on the metal sheet
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The present invention relates to a method and a corresponding roll forming machine with a plurality of roll forming stands arranged in series, wherein at least one of the roll forming stands is designed as a sensor roll forming stand 5, wherein, when the sheet metal strip passes through the roll forming machine, at least one force is measured at the sensor roll forming stand 5 and a sensor signal is generated. Preferably, a target value for the sensor signal and a tolerance range are determined during a test run, against which the sensor signal is compared in an operating state. In the operating state, a microprocessor unit with a detection algorithm compares the sensor signal with the target value and/or with the tolerance range and thereby detects a first or at least a second state of the sensor roll forming stand 5, each of which is a measure of process compliance or indicates an early diagnosis of a deviation.