Motor-Driven Rest Bar for Precision Strand Division
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Solution Overview
Problem
Existing double or multi-stranded slitting plants face challenges in accurately dividing rolled products into equal parts, leading to length differences and increased discards due to manual and inaccurate adjustment of the rest bar, which affects the production of uniform strands or bars.
Innovation Solution
A rest bar with integrated motor and reduction unit, controlled remotely or automatically by a PLC, allows for micrometric adjustment during the rolling operation, protected from external agents, enabling precise positioning and division of rolled products into equal parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual adjustment of the rest bar is used, then the structure is simple, but the positioning precision deteriorates to about 1 mm accuracy
Solution Approach 1:
The patent replaces the manual mechanical adjustment system with an automated motor-driven system. A motor connected to a reduction unit drives a lead screw that precisely moves the rolling box transversally, eliminating manual positioning errors and achieving micrometric adjustment precision (0.01-0.1 mm) instead of manual 1 mm accuracy.
Solution Approach 2:
The patent changes the adjustment parameter from coarse manual positioning to fine micrometric control through the combination of motor, reduction unit, and lead screw mechanism. This allows the rolling box position to be adjusted in very small increments, precisely controlling the mass distribution between strands.
2Ease of operation
If adjustment is performed when the rolled product is not inside the rolling box, then the adjustment mechanism is accessible, but the production process must be interrupted
Solution Approach 1:
The patent enables preliminary adjustment actions to be performed continuously during production. The automated motor-driven system allows the rolling box position to be adjusted at any time without requiring production interruption, as the system can perform micrometric adjustments while the rolled product is being processed through the rolling mill.
Solution Approach 2:
The patent implements continuous adjustment capability during the rolling operation. The motor and reduction unit system allows the rolling box to be repositioned transversally without stopping the production line, maintaining continuous useful action and eliminating interruptions that would occur with manual adjustment methods.
3Device complexity
If the rolling box position is not precisely controlled, then the adjustment mechanism is simple, but the mass distribution between strands deteriorates leading to length differences
Solution Approach 1:
The patent replaces simple mechanical positioning with a motor-driven precision control system. The motor connected to a reduction unit and lead screw mechanism provides automated, precise control of the rolling box position, ensuring uniform mass distribution between strands and eliminating length differences caused by improper positioning.
Solution Approach 2:
The patent implements feedback control where the position of the rolling box is precisely monitored and adjusted. The motor-driven system with reduction unit allows for closed-loop control that ensures the rolling box maintains the correct transversal position, compensating for any deviations and maintaining consistent mass distribution.
4Ease of operation
If external agents (water, dust) are present during adjustment, then the adjustment mechanism is exposed and accessible, but the adjustment accuracy deteriorates due to contamination
Solution Approach 1:
The patent uses protective covers or enclosures (flexible shells) to protect the motor, reduction unit, and lead screw mechanism from external agents. These protective elements prevent water, dust, and other contaminants from entering the precision adjustment mechanism, maintaining adjustment accuracy while allowing the system to operate in the harsh rolling mill environment.
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 minimizes length differences between strands or bars, reduces discards, and enhances production efficiency by enabling accurate and continuous adjustment of the rest bar position, ensuring optimal separation and mass distribution during the rolling process.
Implementation Method 1
a worm screw, defining a longitudinal axis, a rolling guide, for guiding a material to be rolled into rolling cylinders of said rolling stand, the rolling guide being fixed to the worm screw so that, at an angular rotation of the worm screw around its longitudinal axis, the rolling guide translates by a linear movement which is transversal to the rolling axis
Data Source
AI summary
A rest bar (10) for a double or multi-stranded rolling plant, adapted to cooperate with a rolling stand of said rolling plant, said plant defining a rolling axis, the rest bar comprising a motor (7), a reduction unit (8), a worm screw (6), a rolling guide (11), for guiding a material to be rolled into rolling cylinders (30) of said rolling stand, said rolling guide being fixed to the worm screw (6) so that, at an angular rotation of the worm screw (6) about its axis, the rolling guide (11) translates by a linear movement which is transversal to the rolling axis.