Alloy Sheet Forming with Temperature-Gradient Die Control
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Solution Overview
Problem
Forming complex-shaped components from aluminum and magnesium alloys is challenging due to their low ductility, leading to high material wastage and costs, as existing methods require quick forming with high forces and are difficult to execute effectively before the sheet cools.
Innovation Solution
Heating the alloy sheet to a temperature below the solution heat treatment temperature, forming it between heated dies, and then quenching it between cold dies to complete the complex shape, optimizing formability and minimizing heat loss and tool wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If forming is carried out rapidly before the sheet cools, then complex shape can be formed, but very quick press with high forming forces is required which increases cost and shortens tool life
Solution Approach 1:
The patent applies parameter changes by heating the sheet to a temperature below SHT temperature before forming, and then heating to SHT temperature during forming. This temperature parameter change improves formability, allowing complex shapes to be formed with lower forming forces, thus reducing tool wear and equipment cost while maintaining the ability to form complex geometries
2Shape
If forming is carried out rapidly before the sheet cools, then complex shape can be formed, but expensive equipment with high forming forces is required
Solution Approach 1:
By changing the temperature parameter (heating to below SHT temperature before forming, then to SHT temperature during forming), the patent improves formability which reduces the requirement for expensive high-force presses, thereby simplifying the equipment needed while still achieving complex shapes
3Ease of manufacture
If forming is carried out at SHT temperature, then forming can be completed, but inclusions become liquid and create micro-voids reducing formability
Solution Approach 1:
The patent applies preliminary action by heating the sheet to a temperature below SHT temperature before forming begins. This preliminary heating improves formability by preventing inclusion melting and micro-void creation, while subsequent heating to SHT temperature during forming ensures complete forming. The preliminary temperature control prevents manufacturing defects
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 method enhances the formability of alloys at lower temperatures, reducing material wastage and tool wear, allowing for the efficient production of complex components with less expensive equipment and longer tool life.
Implementation Method 1
heating the alloy sheet to a temperature below the solution heat treatment temperature
Implementation Method 2
forming it between heated dies into or towards the complex shape
Implementation Method 3
quenching the solution heat treated sheet between cold dies and at the same time completing the forming into the complex shape
Data Source
AI summary
Method of forming a component of complex shape from an Al-alloy sheet or a Mg-alloy sheet. The method includes the steps of: a) heating the sheet to a temperature below the solution heat treatment (SHT) temperature for the alloy; b) forming the heated sheet between heated dies into or towards the complex shape; c) heating the sheet to at least its SHT temperature and substantially maintaining that temperature until SHT has been completed; and d) quenching the solution heat treated sheet between cold dies and at the same time completing the forming into the complex shape or maintaining that shape.