Mill Stand Roller Stabilization With Hydraulic Oscillation Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rolling mill technologies face challenges in stabilizing working and back-up rollers during hot rolling, leading to stand oscillations that degrade strip surface quality and reduce mechanical component lifespan, especially in high productivity conditions and thin strip production.
Innovation Solution
The implementation of a device with multiple hydraulic pressing units and oscillation absorbers integrated into the mill stand's bending blocks and housings, which apply hydraulic pressure to stabilize the rollers and absorb pressure oscillations, reducing stand oscillations by mechanically bracing the rollers against the mill stand housings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If hydraulic pressing units are added to stabilize rollers, then roller stability improves, but device complexity increases
Solution Approach 1:
The patent combines multiple hydraulic pressing units into a single integrated stabilization system that simultaneously stabilizes both working rollers and back-up rollers. The pressing units are merged with the mill stand housing structure, eliminating the need for separate stabilization mechanisms for each roller type.
Solution Approach 2:
The hydraulic pressing units serve multiple functions: they stabilize working rollers, stabilize back-up rollers, and can be integrated with oscillation absorbers to dampen vibrations. This multi-functionality reduces the need for separate dedicated stabilization systems.
2Object-affected harmful factors
If oscillation absorbers are integrated into hydraulic pressing units, then stand oscillations are reduced, but manufacturing complexity increases
Solution Approach 1:
The oscillation absorbers are nested within the hydraulic pressing units, with the absorber components integrated into the pressing unit structure. This nesting approach allows the oscillation absorption function to be incorporated without requiring separate external systems.
Solution Approach 2:
The oscillation absorbers act as intermediary elements between the hydraulic pressing units and the rollers, absorbing vibrations and oscillations before they can affect the rolling process and strip quality.
3Manufacturing precision
If multiple hydraulic pressing units are used to stabilize both working and back-up rollers, then strip surface quality improves, but cost increases
Solution Approach 1:
The stabilization system is segmented into distinct hydraulic pressing units, each with its own oscillation absorber, allowing independent optimization and maintenance of each pressing point while achieving overall system stability.
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 effectively reduces stand oscillations, enhancing strip surface quality, extending the lifespan of mechanical components, and increasing productivity in thin strip production by stabilizing the working and back-up rollers in hot-rolling mill stands.
Implementation Method 1
each first hydraulic pressing unit comprising a piston with a piston rod and a pressure plate, the piston and the piston rod being integrated in the bending block and the pressure plate being able to be pressed hydraulically against the working roller chock
Implementation Method 2
one, preferably each, first hydraulic pressing unit contains a first oscillation absorber, which reduces pressure oscillations that occur in a pressure chamber, preferably a piston-side pressure chamber, of the first hydraulic pressing unit
Data Source
AI summary
A device for stabilizing of working rollers and back-up rollers of a mill stand that has, for each bending block, first hydraulic pressing units being arranged upstream of the working roller, each first hydraulic pressing unit having a piston with a piston rod and a pressure plate, the piston and the piston rod being integrated in the bending block and the pressure plate being pressable against a working roller chock, and for each stand column, at least one second hydraulic pressing unit, the second hydraulic pressing unit being arranged downstream of the back-up roller and having a piston with a piston rod and a pressure plate, the piston and the piston rod being integrated in the stand column and the pressure plate being pressable against the back-up roller chock, and a first hydraulic pressing unit containing a first oscillation absorber.