Push Roll Stand with Differential Roll Speeds

Solution Overview

Problem

Existing roll stands for flat rolling face disadvantages such as uneven metal properties and uneven loading of drive trains due to asymmetrical processing conditions, which outweigh the advantages of reduced roll force in push rolls, leading to their limited use in sheet metal production.

Innovation Solution

A roll stand with displaceable rolls and adjustable mechanisms, including hydraulic and mechanical actuators, allows for differential roll diameters and operational speeds, enabling precise control of rolling conditions to minimize these disadvantages.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If push rolls with asymmetrical processing conditions are used, then roll force is reduced due to shear, but uneven metal properties across the thickness of the sheet metal occur

Engineering Contradiction:

Improveroll forceVSAvoidmetal properties uniformity

Core Design Contradiction:

ForceVSManufacturing precision

Solution Approach 1:

The patent applies asymmetry by using rolls of different diameters in the rolling mill. The working rolls have different diameters (D1 ≠ D2), creating asymmetrical rolling conditions that reduce roll force through shear effects while maintaining control over the deformation process

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent implements dynamics by making the rolls displaceable in the rolling direction relative to the frame. Adjustment means are provided to displace the rolls differentially, allowing dynamic control of the rolling conditions to optimize both force reduction and metal property uniformity during the rolling process

Inventive Principle:

Principle #15Dynamics

2Force

If push rolls with asymmetrical processing conditions are used, then roll force is reduced due to shear, but uneven loading of the drive trains of the rolls occurs

Engineering Contradiction:

Improveroll forceVSAvoiddrive train loading uniformity

Core Design Contradiction:

ForceVSEase of operation

Solution Approach 1:

The patent applies asymmetry by using rolls of different diameters in the rolling mill. The working rolls have different diameters (D1 ≠ D2), creating asymmetrical rolling conditions that reduce roll force through shear effects while maintaining control over the deformation process

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent implements dynamics by making the rolls displaceable in the rolling direction relative to the frame. Adjustment means are provided to displace the rolls differentially, allowing dynamic control of the rolling conditions to optimize both force reduction and metal property uniformity during the rolling process

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If rolls of different diameters are used, then rolling conditions can be selectively unequal for both working rolls, but device complexity increases due to adjustment mechanisms

Engineering Contradiction:

Improverolling conditions controlVSAvoidadjustment means

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by providing adjustment means on each side between the roll mounts and the frame, and also on each side of each of the two rolls. This segmented approach allows independent adjustment of each roll while maintaining overall system coordination

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The adjustment means serve multiple functions: they displace the rolls in the rolling direction, enable differential positioning of rolls with different diameters, and can be used to control both the upper and lower roll sets. This multi-functionality reduces the need for separate adjustment mechanisms for each function

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 the disadvantages of asymmetrical rolling by allowing for adjustable roll sets with different diameters and speeds, maintaining even metal properties and load distribution, thus enhancing the operational efficiency and usability of roll stands in sheet metal production.

Implementation Method 1

the adjusters have is hydraulic and/or mechanical actuators

Methodology Applied

Scientific EffectHydraulic pressure: Hydraulic Press

Implementation Method 2

the adjusters have is hydraulic and/or mechanical actuators

Methodology Applied

Scientific EffectMechanical actuation: Mechanical Force

Implementation Method 3

the frictional conditions of both working rolls are made as equal as possible

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS9770745B2Roll stand, particularly push roll stand

Publication Date: 2017.09.26 SMS GROUP GMBH

AI summary

The invention relates to a roller device (50) having a stand and two roller sets having at least two rollers (52, 53, 54, 55) disposed in a stand (51) of the roller device, wherein a roll material (56) can be fed between two rollers (53, 54) of the two roller sets for rolling, wherein at least the rollers (52, 53) of a roller set can be displaced in the rolling direction relative to the stand (51), wherein adjustment means are provided between a roller bearing for receiving the rollers and the stand, each on both sides of the roller bearing. It is thereby particularly advantageous if the circumferential speeds of the rollers, such as the working rollers, are different.