Roll Stand Camber Block Axial Movement Design
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Solution Overview
Problem
Existing roll stands face issues with relative axial movements between working rollers and side bearing units during axial movement of intermediate rollers, leading to axial loads and surface degradation, as well as interference problems during vertical movements and maintenance, which complicates operations and increases costs due to the need for specialized tools and spare parts.
Innovation Solution
A sexto-type roll stand design with camber blocks that allow axial movement and cambering of intermediate rollers, while keeping side bearing units axially fixed relative to the working rollers and the roll stand, enabling synchronized vertical movement and maintenance without dismantling, using standard bearings and eliminating the need for specialized lubrication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If intermediate rollers are moved axially during rolling operation, then cambering of working rollers is achieved, but relative axial movement occurs between working rollers and side bearing units causing axial loads and surface degradation
Solution Approach 1:
The system is segmented into independent axial movement components: intermediate rollers can move axially on camber blocks while side bearing units remain axially fixed. This segmentation allows cambering functionality to be isolated from the side bearing units, preventing relative axial movement between working rollers and side bearing units during intermediate roller cambering operations.
Solution Approach 2:
Camber blocks serve as intermediary elements between the intermediate rollers and the fixed frame. These camber blocks enable axial movement of intermediate rollers while the side bearing units remain fixed to the frame, thus mediating the cambering action without transmitting axial movement to the side bearing units or working rollers.
2Reliability
If side bearing units are integrated with intermediate rollers, then lateral support is provided, but interference occurs during vertical movements and maintenance operations
Solution Approach 1:
The system separates the side bearing units from the intermediate rollers, creating independent functional components. Side bearing units are fixed to the frame while intermediate rollers move independently on camber blocks. This segmentation eliminates interference during vertical movements and maintenance operations, as each component can move or be serviced without affecting the other.
Solution Approach 2:
The side bearing units are designed with dynamic positioning capability through guide devices that allow lateral movement while maintaining fixed axial position. This dynamic design enables the side bearing units to accommodate vertical movements of working rollers without interference, while maintaining stable lateral support during rolling operations.
3Adaptability or versatility
If specialized bearing systems are used for intermediate rollers, then axial movement is enabled, but device complexity and costs increase
Solution Approach 1:
The camber blocks are designed as simple, replaceable components that enable axial movement of intermediate rollers without requiring complex specialized bearings. These camber blocks can be easily manufactured and replaced, providing the necessary axial movement capability while keeping the overall bearing system simple and cost-effective.
Solution Approach 2:
The axial movement function is extracted from the bearing system and implemented through camber blocks instead. This separates the axial movement capability from the traditional bearing structure, allowing standard bearings to be used in side bearing units while intermediate rollers achieve axial movement through the simpler camber block mechanism.
Data Source
AI summary
A roll stand has two working rollers capable of gripping a strip to be rolled, two intermediate rollers, two bearing rollers, and at least one side bearing unit capable of laterally supporting the working rollers. At least one camber block for cambering the intermediate rollers is capable of vertical movement relative to the posts of the roll stand and of supporting the side bearing unit.