Strip Edge Stabilization in Galvanizing Plants
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Solution Overview
Problem
In modern galvanizing plants, strip waviness, vibrations, and transverse bends prevent scrapers from achieving optimal contact with the strip material, leading to uneven zinc coating due to fixed strip stabilizers being ineffective at the band edges, resulting in disruptive corrugations.
Innovation Solution
A device and method for strip edge stabilization using an adjustment device with a sensor to detect strip edge positions and an adjustment drive to position means for stabilizing the edges, such as coils or edge masks, to ensure smooth passage through scrapers, combined with height adjustment of wiping nozzles for optimal coating removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fixed strip stabilizers are used, then the device structure is simple, but the strip edge stabilization is ineffective at band edges resulting in disruptive corrugations
Solution Approach 1:
The patent applies the dynamics principle by making the stabilizing means movable rather than fixed. The stabilizing means can be adjusted in the transverse direction to follow the actual position of the strip edges, enabling effective stabilization at the band edges while maintaining a relatively simple device structure.
Solution Approach 2:
The patent implements feedback by using sensors to detect the actual position of the strip edges and using this information to control the positioning of the stabilizing means. This closed-loop control system ensures that the stabilizing means are always positioned correctly at the strip edges, eliminating disruptive corrugations.
2Manufacturing precision
If scrapers are brought very close to the strip material, then the desired zinc film thickness is achieved, but strip waviness prevents optimal contact resulting in uneven coating
Solution Approach 1:
The patent applies preliminary anti-action by positioning the stabilizing means before the scrapers to preemptively counteract strip waviness and vibrations. The stabilizing means dampen edge waves and vibrations in advance, ensuring that the strip material is stable when the scrapers make contact, thereby achieving uniform zinc coating thickness.
Solution Approach 2:
The patent implements preliminary action by stabilizing the strip edges before the coating and scraping operations. The stabilizing means are positioned to act on the strip material prior to its passage through the scrapers, pre-conditioning the strip to eliminate waviness and ensure optimal scraper contact for uniform coating removal.
3Manufacturing precision
If adjustable stabilizing means are used, then strip edge stabilization is improved, but the device complexity increases with adjustment devices and sensors
Solution Approach 1:
The patent applies the self-service principle by enabling the stabilizing means to automatically adjust their own position based on sensor feedback. The system self-regulates the positioning of the stabilizing means without requiring complex external adjustment mechanisms, thereby improving strip edge stabilization while limiting the increase in device complexity.
4Device complexity
If stabilizing means are positioned away from strip edges, then the device structure is simple, but edge waves and vibrations are not dampened resulting in material wastage
Solution Approach 1:
The patent implements feedback by using sensors to detect the actual position of the strip edges and using this information to control the positioning of the stabilizing means. This ensures the stabilizing means are always at the correct location to dampen edge waves effectively, preventing material wastage through uneven coating and rework.
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
The solution effectively reduces waviness and ensures a consistent zinc coating thickness by accurately positioning stabilization means and scrapers, minimizing material wastage and maintaining even coating quality at the strip edges.
Implementation Method 1
at least one sensor (6) is provided, which detects the current position of the strip (2) with its strip edges (3.4)
Implementation Method 2
an adjustment device (7) with an adjustment drive (7a), which adjusts the means (8) for stabilizing the strip edges
Implementation Method 3
The means for strip edge stabilization can preferably be provided on one strip edge or on both opposite strip edges... dampen edge waves and vibrations
Implementation Method 4
The excess zinc material is then removed again with a pneumatic scraper
Implementation Method 5
the strip material to be galvanized is passed through a zinc-containing bath so that a zinc film forms on the strip material
Data Source
Figure 1~3
Figure 4~7
AI summary
The invention relates to a method and a device (1) for stabilising the edges of a strip (2), said device comprising at least one sensor (6) for identifying the position of the at least one strip edge (3, 4) and at least one adjusting device (7) by which means at least one element (8) for stabilising strip edges can be positioned according to the identified position of the at least one strip edge (3, 4).