Sheet Metal Forming Quality Visualization via Risk Region Mapping
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Solution Overview
Problem
Current CAD/CAE simulation methods for sheet metal forming are time-consuming and require extensive expertise, as they involve repeatedly varying restraining forces to optimize the forming process, leading to inefficiencies in determining suitable parameters for preventing material thinning and thickening issues.
Innovation Solution
A method and computing system that simplifies the simulation process by computing representative values for regions affected by restraining forces, providing a visual representation of quality aspects and guiding designers to modify the part geometry to minimize risks of thinning and thickening, with a diagram showing the relative size of risk regions for different restraining forces, allowing for the determination of an optimal force range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If repeatedly performing numerical simulations with varied restraining forces to optimize forming process, then manufacturing precision of formed part is improved, but productivity is deteriorated due to time-consuming computations
Solution Approach 1:
The patent segments the complex forming process simulation into distinct risk regions (thinning risk regions and thickening risk regions) that can be independently analyzed and evaluated. This allows designers to focus on specific problematic areas rather than analyzing the entire part uniformly, reducing computational requirements while maintaining precision.
Solution Approach 2:
The patent replaces repeated full numerical simulations with a simplified evaluation method that uses visual representations and risk region analysis. This substitution reduces the computational mechanics from complex FEM calculations to a more efficient visual assessment system that still provides accurate forming quality evaluation.
2Manufacturing precision
If repeatedly performing numerical simulations with varied restraining forces to optimize forming process, then manufacturing precision of formed part is improved, but loss of time is deteriorated due to extensive computation requirements
Solution Approach 1:
The patent performs preliminary classification of risk regions before conducting full optimization simulations. By pre-identifying thinning and thickening risk regions and their characteristics, the system prepares the analysis framework in advance, reducing the time required for subsequent detailed simulations and parameter optimization.
Solution Approach 2:
The patent substitutes time-consuming repeated full simulations with a faster visual evaluation approach that uses risk region mapping and graphical representations. This allows rapid assessment of forming quality across different restraining force scenarios without performing complete numerical simulations each time.
3Manufacturing precision
If using complex numerical simulation methods to determine optimal restraining force, then manufacturing precision is improved, but device complexity is deteriorated due to multiple parameters and expertise requirements
Solution Approach 1:
The patent introduces visual representations and risk region maps as intermediary tools between the complex numerical simulation and the designer. These visual intermediaries translate complex simulation data into intuitive graphical formats, making it easier to interpret results and make design decisions without requiring deep expertise in simulation methodology.
Solution Approach 2:
The patent replaces complex multi-parameter numerical simulation systems with a simplified visual evaluation system that focuses on key risk regions. This substitution reduces system complexity by concentrating analysis on critical areas rather than requiring comprehensive analysis of all parameters throughout the entire part.
4Manufacturing precision
If applying high restraining force to prevent material thickening, then manufacturing precision is improved by avoiding wrinkles, but object-affected harmful factors are deteriorated due to material thinning and tearing
Solution Approach 1:
The patent applies local quality analysis by identifying and treating different regions of the part differently. Thinning risk regions and thickening risk regions are separately identified and evaluated, allowing the application of appropriate restraining forces locally rather than uniformly across the entire part. This prevents over-restraint in some areas while providing sufficient restraint in others.
Solution Approach 2:
The patent uses visual feedback from risk region analysis to guide the selection of optimal restraining forces. The graphical representations show which areas are at risk of thinning or thickening, providing feedback that helps designers adjust restraining force parameters to achieve the right balance and avoid harmful effects.
5Object-affected harmful factors
If applying low restraining force to prevent material thinning, then object-affected harmful factors are reduced, but manufacturing precision is deteriorated due to material compression and wrinkles
Solution Approach 1:
The patent applies local quality control by differentiating between regions prone to thinning and regions prone to thickening. By mapping risk regions locally, the system enables application of appropriate restraining forces in specific areas rather than using a uniform approach, thus preventing wrinkles in thickening-prone areas while protecting thinning-prone areas from excessive force.
Solution Approach 2:
The visual risk region analysis provides feedback on which areas are susceptible to thinning versus thickening under different restraining force conditions. This feedback mechanism guides designers in selecting restraining force levels that prevent thinning in vulnerable areas while maintaining sufficient control to avoid wrinkles in other areas.
Data Source
Figure 1~2
Figure 3~5
AI summary
In a method for designing a formed sheet metal part, a method for displaying a visual representation (10) of the quality of the formed sheet metal part, the method comprising the steps of: ● simulating the deformation of the part by a forming process of the part, thereby computing thinning and thickening effects of the forming process on the part, for different values of a restraining force; ● displaying a visual representation of the part and of the thickening and thinning effects of different regions of the part; ● classifying the surface of the part as having several regions (11, 12, 13, 14, 15), each region being associated with a particular range of the thickening and thinning effects; ● computing and displaying on a display device (3) a diagram (21, 22, 23, 24, 25) displaying, as a function of the restraining force, the relative size of areas of these regions.