Metal Forming Shield Protuberances Reduce Heat Loss
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Solution Overview
Problem
Metal forming tools in superplastic forming (SPF) and quick plastic forming (QPF) experience significant heat loss through side shields, leading to inefficiency and higher operating costs.
Innovation Solution
The use of metal shields with protuberances that define open spaces between the mounting plate and the forming tool, or the incorporation of thermally insulating material between the shield and the tool, to reduce heat transfer and maintain a uniform tool temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional solid metal shields are used between the mounting plate and forming tool, then structural strength and durability are maintained, but heat loss through the shields is significant (approximately 50% of total heat loss)
Solution Approach 1:
The shield is segmented by providing protuberances that define open spaces between them, transforming the solid shield into a structured arrangement with gaps. This segmentation reduces the continuous metal path for heat conduction while maintaining structural integrity through the distributed protuberance structure
Solution Approach 2:
Different regions of the shield area are treated differently - solid protuberances provide structural support where needed, while open spaces between them provide thermal insulation. This local differentiation allows the shield to simultaneously achieve strength and heat reduction
2Loss of energy
If thermally insulating materials such as ceramics are used for shields, then heat loss is reduced, but cost increases and durability decreases compared to metal
Solution Approach 1:
Air acts as an intermediary thermal insulator between the metal protuberances and the forming tool. The open spaces filled with air provide thermal insulation without requiring expensive ceramic materials, achieving heat loss reduction while maintaining metal shield durability and cost-effectiveness
Solution Approach 2:
The shield structure creates a porous or open-space configuration using metal protuberances, allowing air to serve as the insulating medium. This approach achieves thermal insulation similar to porous insulating materials but using durable, cost-effective metal components
3Stability of the object's composition
If solid metal shields are used, then structural durability is maintained, but tool temperature uniformity deteriorates due to significant heat loss
Solution Approach 1:
The shield is divided into multiple protuberances with open spaces between them, creating a segmented structure that reduces heat conduction paths. This segmentation allows better temperature distribution across the tool while maintaining the durability of metal components
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 configuration significantly reduces heat loss, enhancing thermal efficiency and lowering operating costs while maintaining durability and cost-effectiveness compared to more insulating materials.
Implementation Method 1
a shield extending between the plate and the tool. The shield is in heat transfer relationship with the metal forming tool via the protuberances
Implementation Method 2
thermally insulating material separating the shield and the forming tool
Data Source
AI summary
Metal forming apparatuses provide enhanced thermal efficiency by reducing thermal conduction from a forming tool to a shield. In one embodiment, a shield extends between a tool and a mounting plate, and is in conductive heat transfer relationship with the tool via a plurality of protuberances. In another embodiment, a shield extends between a tool and a mounting plate, and thermally insulating material separates the tool and the shield.