Inert Roll Connection Assembly for Molten Metal Torque Transfer
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Solution Overview
Problem
Ceramic or carbon composite rolls used in molten metal baths experience breakage due to force concentration between the roll and the shaft, and there is a need for a reliable method to support and handle these rolls without causing damage.
Innovation Solution
A three-part connection system is used, comprising a first part connecting with a bushing, a second part with fastening means attached to the roll, and a third part with a parallelepiped section that press-fits into the roll due to thermal expansion, ensuring secure handling and rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ceramic or carbon composite rolls are used to replace metallic rolls, then resistance against corrosion and wear is improved, but mechanical strength and resistance to breakage deteriorate
Solution Approach 1:
The invention uses composite material structure by combining ceramic or carbon composite roll body with metallic connection parts (shaft and bearing). The roll body maintains corrosion and wear resistance, while the metallic connection parts provide the necessary mechanical strength to handle the roll without breakage.
Solution Approach 2:
The roll system is divided into separate components: the inert roll body (ceramic or carbon composite) and the metallic connection parts (shaft and bearing). This segmentation allows each component to be optimized for its specific function - the roll body for corrosion/wear resistance and the connection parts for mechanical strength.
2Strength
If hollow rolls with inserted shafts are used to avoid breakage, then mechanical strength is improved, but handling and transport become more difficult
Solution Approach 1:
The connection parts (shaft and bearing) are pre-assembled with the roll body before the roll is placed into service. The shaft is inserted into the hollow roll body and secured with fastening means, creating a complete assembly that is easier to handle and transport as a single unit rather than separate components.
Solution Approach 2:
The invention merges the roll body with the connection parts (shaft and bearing) into a single integrated assembly. The fastening means combine these components together, creating a unified structure that maintains both the mechanical strength of the connection parts and the corrosion resistance of the roll body, while simplifying handling and transport.
3Ease of operation
If a connection system is added to support and handle the roll, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The invention extracts the connection function from the roll body itself by adding separate connection parts (shaft and bearing). This allows the roll body to remain simple and focused on its primary function of guiding the substrate, while the connection parts provide the necessary support and handling capabilities.
Solution Approach 2:
The shaft and bearing act as intermediary components between the roll body and the handling/transport system. These intermediaries simplify the connection interface, providing standard mechanical interfaces that ease handling and support while isolating the complex connection requirements from the roll body design.
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 connection system prevents roll breakage by distributing mechanical stress and allows safe handling and rotation of inert rolls in molten metal baths, maintaining torque transmission and reducing wear.
Implementation Method 1
said connection part (7) being made of a material having a higher thermal dilatation coefficient than said roll (5), said coefficient being chosen so that said third part (12) and said roll (5) are pressfitted through thermal dilatation when in the molten metal bath (3)
Data Source
AI summary
A method and an equipment permitting to optimally handle and support a roll made of at least an inert material and transfer the torque from a bearing to a roll or the other way around without damaging them, the roll and bearing being immersed in molten metal.