Aluminum Plate Forming with Local Current to Prevent Cracking
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Solution Overview
Problem
The low formability of aluminum plates at room temperature leads to cracking during forming, making it difficult to produce complex shapes, and warm forming processes are inefficient, increasing costs due to slow processing speeds and uniform heating requirements.
Innovation Solution
An apparatus and method that apply electrical currents through a die system with strategically positioned electrodes to enhance the formability of aluminum plates by restoring elongation during the forming process, using a primary and secondary current application to specifically target areas of deformation, thereby improving process speed and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If room-temperature press processing is used, then processing speed is fast and cost is low, but the aluminum plate cracks due to low elongation and poor formability
Solution Approach 1:
The patent applies electrical current to the aluminum plate during forming to dynamically change the material's physical state and restore elongation, enabling complex shape formation without cracking while maintaining processing efficiency
Solution Approach 2:
The patent replaces the conventional mechanical warm-forming system (heating equipment, temperature control) with an electrical current-based system that achieves similar formability enhancement without thermal processing infrastructure
2Reliability
If warm forming process is used, then formability is improved, but processing speed decreases and cost increases due to uniform heating requirements
Solution Approach 1:
The patent applies electrical current locally to specific regions of the aluminum plate where deformation occurs, rather than heating the entire plate uniformly. This localized treatment restores elongation precisely where needed, maintaining formability while dramatically reducing processing time and energy consumption
Solution Approach 2:
The patent applies electrical current to the aluminum plate before and during the forming process to proactively restore elongation and prevent cracking, rather than relying on thermal softening that requires extended heating time
3Reliability
If warm forming process is used, then formability is improved, but cost significantly increases due to extended processing time
Solution Approach 1:
The patent uses electrical current to change the physical state of the aluminum plate, restoring elongation and enabling complex forming. This method achieves the formability benefits of warm forming without the extended processing time and associated costs of thermal processing equipment and energy consumption
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 method significantly enhances the formability of aluminum plates by restoring elongation to near original material levels, allowing for faster and more efficient processing without altering the product shape, thus overcoming the limitations of traditional warm forming methods.
Implementation Method 1
applying an electrical current while the aluminum plate is deformed
Implementation Method 2
an electrode unit inserted into the lower die and exposed on the upper surface of the lower die to apply a current
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
An apparatus for forming an aluminum plate (40) is provided. The apparatus includes an upper die (10) that has a bottom surface that corresponds to a top shape of a product shape to be formed and descends by a press to press the aluminum plate (40). The apparatus also includes a lower die (20) that has an upper surface that corresponds to a bottom shape of the product shape and an electrode unit (61,62) that is inserted into the lower die (20) and is exposed on the upper surface of the lower die (20) to apply a current to a bent portion of the product shape.