Detachable Roll Cassettes for Safer Rolling Mill Changes
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Solution Overview
Problem
Existing roll-changing processes in rolling mills are difficult to automate, labor-intensive, time-consuming, and pose safety risks due to high manual intervention and inadequate protection against roll breakouts during crane operations.
Innovation Solution
A detachable cassette system with a base body and crane cross member, equipped with load attachment means, allows for automated loading and unloading of rolls using an overhead crane, ensuring secure transport and rapid exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If individual rolls are transported separately between the rolling stand and the roll changing carriage, then the rolls can be exchanged, but the process becomes difficult to automate and requires high crane activity
Solution Approach 1:
The system is segmented into modular components: a roll changing carriage, multiple cassettes (each holding multiple rolls), and an overhead crane. Instead of transporting individual rolls, the system transports entire cassettes containing multiple rolls, reducing the number of transport operations required while maintaining organizational structure.
Solution Approach 2:
Multiple rolls are pre-loaded into cassettes in advance. When a roll change is needed, the entire cassette is transported and exchanged as a unit, eliminating the need for individual roll handling during the change process. This preliminary preparation enables automation and reduces crane activity.
2Reliability
If individual rolls are transported separately, then roll exchange is possible, but manual intervention increases and safety problems arise
Solution Approach 1:
The system separates the heavy lifting function (performed by the overhead crane on cassette level) from the positioning function (performed by the roll changing carriage). This segmentation reduces manual intervention to minimal positioning tasks while improving safety through mechanical handling of heavy loads.
Solution Approach 2:
The cassette acts as an intermediary carrier between the overhead crane and the roll changing carriage. It consolidates multiple rolls into a single handleable unit, enabling the crane to transport multiple rolls in one operation and reducing the need for manual handling of individual heavy rolls.
3Productivity
If individual rolls are transported separately, then rolls can be exchanged, but the process becomes time-consuming and labor-intensive
Solution Approach 1:
Multiple rolls are pre-loaded into cassettes during non-production time or between slabs. When roll changes are needed, pre-loaded cassettes are immediately transported and exchanged, eliminating loading/unloading time during critical roll changing operations and improving productivity.
Solution Approach 2:
The system segments rolls into cassette-level units, allowing parallel preparation and transport of multiple rolls. This enables the roll changing process to be decoupled from individual roll preparation, reducing overall process time and enabling faster roll changes.
4Extent of automation
If a detachable cassette system is used, then automated loading and unloading is enabled, but the device complexity increases
Solution Approach 1:
The system is divided into standardized, modular components: detachable cassettes with standardized interfaces and a carriage with corresponding receptacles. This segmentation enables automated handling through simple mate/unmate operations while maintaining relatively simple individual component designs.
Solution Approach 2:
The cassette design provides multi-functionality: it serves as a storage container for multiple rolls, a transport unit for the overhead crane, and a interface element for the roll changing carriage. This universal design reduces the need for multiple specialized components, actually simplifying the overall system despite enabling automation.
Data Source
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AI summary
The invention relates to a roll-changing device (1) for changing the working and/or intermediate rolls (2) of a roll stand, the roll-changing device (1) comprising a roll-changing carriage (3) with which rolls (2) to be changed out or in can be transported. According to the invention, in order to develop such a roll-changing device such that it is possible to ensure simpler and safer loading and unloading of a roll-changing carriage, the roll-changing device (1) comprises a cartridge (4) which can be detachably mounted in the roll-changing carriage (3), wherein the cartridge (4) is provided with receiving spaces (5) for the rolls (2).