Integrated Inspection Unit for Rolling Stand Defect Detection
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Solution Overview
Problem
Existing in-line detection methods for surface defects in rolled products are sensitive to transverse vibrations, leading to reduced sensitivity and the inability to detect small defects, and require complex reconfiguration for different product formats, resulting in inaccurate detection and increased setup times.
Innovation Solution
The integration of detection coils directly into the rolling stand's support structure allows for stable, in-line detection of surface defects with a high filling factor, reducing the risk of product contact and enabling the detection of small defects, while also simplifying reconfiguration and maintenance by leveraging existing cooling systems and structural elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electromagnetic detection coils are disposed downstream of the rolling line with a high filling factor to improve detection sensitivity, then the ability to detect small surface defects is improved, but the risk of contact between the rolled product and the internal wall of the coil hole increases due to vibrations and transverse movements
Solution Approach 1:
The inspection unit is integrated directly into the support structure of the rolling stand, merging the detection system with the existing rolling equipment. This eliminates the separation between rolling and inspection, allowing the rolled product to be inspected while still supported by the guide element, thereby reducing transverse movements and vibrations during detection.
Solution Approach 2:
The guide element acts as an intermediary between the rolling means and the inspection unit. It provides continuous support and guidance to the rolled product during the inspection process, maintaining proper alignment and reducing transverse movements that would otherwise cause contact with the coil hole wall.
2Ease of manufacture
If electromagnetic detection coils are disposed downstream of the rolling line to simplify installation, then the ease of installation is improved, but the detection sensitivity decreases due to increased transverse movements and vibrations of the rolled product
Solution Approach 1:
The inspection unit is integrated directly into the support structure of the rolling stand, merging the detection system with the existing rolling equipment. This eliminates the need for separate downstream installation structures, simplifying installation while maintaining detection sensitivity through reduced vibrations.
Solution Approach 2:
The support structure of the rolling stand serves multiple functions: it supports the rolling means for the roll-mill process and simultaneously houses the inspection unit for defect detection. This multi-functionality eliminates the need for dedicated installation structures while maintaining detection performance.
3Ease of operation
If a separate inspection unit is installed downstream of the rolling line, then the detection function is simplified, but the reconfiguration time increases when rolling units are reconfigured for new product formats
Solution Approach 1:
The inspection unit is integrated into the support structure of the rolling stand, so that when the rolling unit is reconfigured for a new product format, the inspection unit is automatically repositioned along with the rolling means. This eliminates separate reconfiguration steps and reduces setup time.
Solution Approach 2:
The support structure serves both rolling and inspection functions, meaning that a single reconfiguration action simultaneously adjusts both the rolling means and the inspection unit to accommodate new product formats, significantly reducing reconfiguration time.
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 provides highly sensitive and accurate detection of surface defects, including those smaller than 2% of the product diameter, while reducing setup times and preventing assembly errors, ensuring high stability and signal-to-noise ratio during the rolling process.
Implementation Method 1
coils able to generate an electro-magnetic field and relative reception coils, detect the presence of surface defects, such as cracks, inclusions, microfissures
Data Source
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AI summary
A device (10) for the in-line detection of surface defects of a rolled product (30) in a rolling stand (11, 111) comprises an inspection unit (19) having one or more coils (20, 21) able to generate and detect magnetic fields. The rolling-stand (11, 111) is provided with a support structure (28) supporting rolling means (12, 112) that are provided for effecting a roll-mill process on said product (30), a guide element (13) having a guide hole (14) defining a nominal rolling axis (X) and a support unit (15, 115), assembled on the support structure (28) and which is provided as a structural element of the rolling stand (11, 111) that supports said guide element (13). The inspection unit (19) is assembled on said support unit (15, 115), in order to be directly housed and integrated in the structural element already present in the rolling stand (11, 111).