Bridle Device Snaking Correction for High-Silicon Steel
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Solution Overview
Problem
High-silicon steel strip production in continuous siliconizing treatment facilities faces inefficiencies in snaking correction, leading to increased torsion and potential cracking or breakage, especially at higher line speeds.
Innovation Solution
A bridle device with a pair of rotatable endless belts or caterpillars, equipped with a steering mechanism and rolling reduction mechanism, adjusts its position and pressure distribution to correct snaking by increasing the rolling reduction amount opposite to the snaking direction, maintaining a ratio of 1.5 to 2.5 times the steering amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a movement amount or swinging amount is increased in the steel strip width direction to improve snaking correction capability, then snaking correction effect is improved, but torsion applied to the steel strip increases causing cracking or breakage
Solution Approach 1:
The patent applies local quality by making the rolling reduction amount nonuniform in the width direction. Specifically, one end portion of the steel strip in the width direction is subjected to a different rolling reduction amount than the other end portion. This localized differential treatment corrects snaking by creating asymmetric deformation that counteracts the camber without requiring excessive overall movement or swinging of the bridle device, thereby avoiding excessive torsion and potential cracking.
2Productivity
If line speed is increased to improve production efficiency, then productivity is improved, but snaking correction capability becomes insufficient
Solution Approach 1:
The patent changes the parameter of rolling reduction amount distribution in the width direction to address snaking correction at higher line speeds. By implementing nonuniform rolling reduction where one end portion experiences a different reduction amount than the other, the system achieves effective snaking correction even at elevated production speeds where traditional uniform rolling methods would be insufficient.
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
Effectively suppresses snaking of high-silicon steel strips at higher line speeds, enhancing production efficiency by ensuring the steel strip is produced without cracking or breakage.
Implementation Method 1
a rolling reduction mechanism configured to perform rolling reduction on a pinched portion of the steel strip by using the pair of upper and lower endless belts or the pair of upper and lower caterpillars
Implementation Method 2
causing Si to permeate by heating a steel strip having a relatively low Si concentration and performing siliconizing treatment in an atmosphere with a non-oxidizing gas containing a silicon chloride gas
Implementation Method 3
performing next diffusion treatment to diffuse the Si in the thickness direction
Data Source
AI summary
A bridle device and a method for producing a steel strip in which snaking of a steel strip that occurs during production of a high-silicon steel strip is suppressed. The bridle device includes a pair of upper and lower rotatable endless belts or a pair of upper and lower rotatable caterpillars configured to pinch a steel strip. The bridle device is movable or swingable in a steel strip width direction by using a steering mechanism. The bridle device further includes a rolling reduction mechanism configured to perform rolling reduction on a pinched portion of the steel strip by using the pair of upper and lower endless belts or the pair of upper and lower caterpillars. The steering mechanism moves or swings the bridle device in the steel strip width direction, and the rolling reduction mechanism performs rolling reduction on one of end portions in the steel strip width direction.