Hot Forming Sheet Blanks With Selective Thermal Shielding
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Solution Overview
Problem
Existing hot forming methods for semifinished products, such as press hardening, lack the ability to control material properties regionally, resulting in uniform component properties that do not meet specific requirements, particularly in motor vehicle components where varying properties are needed for different regions.
Innovation Solution
A method involving a shielding device that differentially shields a semifinished product from heat sources during the heating process, allowing regions to achieve distinct temperature ranges and microstructures, thereby controlling material properties and behavior within the component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If uniform heating is applied to the semifinished product, then the heating process is simple and fast, but the material properties cannot be controlled regionally
Solution Approach 1:
The patent applies local quality by introducing shielding means that selectively shield specific regions of the semifinished product from heat radiation. This creates different thermal conditions in different regions, allowing regional control of material properties while maintaining a relatively simple overall heating process setup
2Manufacturing precision
If shielding device is introduced to achieve regional temperature control, then material properties can be differentiated by region, but the device complexity increases
Solution Approach 1:
The shielding means acts as an intermediary element between the heat source and the semifinished product. It mediates the heat transfer process by selectively blocking radiation to specific regions, thereby achieving precise regional temperature control without requiring complex heating system modifications
Solution Approach 2:
The patent changes the thermal parameters (heat absorption, heat reflection, heat insulation) by introducing shielding means with different thermal properties in different regions. This allows precise control of temperature distribution and resulting material properties through parameter modification rather than system redesign
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 approach enables the production of components with region-specific properties, enhancing strength and ductility, which improves energy absorption capacity, particularly suitable for motor vehicle components, while maintaining dimensional stability.
Implementation Method 1
a shielding device is arranged between the heat source and the semifinished product such that the semifinished product is thermally shielded at least in certain portions
Implementation Method 2
hot forming, i.e. forming a metal above its recrystallization temperature
Implementation Method 3
forming a metal above its recrystallization temperature
Implementation Method 4
at least the die and/or the punch can be provided with cooling channels in order to cool the semifinished product during the deep-drawing process
Data Source
AI summary
A method for hot forming a semifinished product in sheet form for a motor vehicle component. The method includes heating the semifinished product to be formed in a heating process and forming the heated semifinished product in a shaping forming process. During the heating process the semifinished product undergoes an input of heat from at least one heat source. During the heating of the semifinished product, a shielding device is arranged between the heat source and the semifinished product, such that the semifinished product is thermally shielded at least in certain portions in such a way that a first semifinished-product portion is heated differently than a second semifinished-product portion.