Automated Sheet Metal Forming Process Definition
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Solution Overview
Problem
The current methods for manufacturing sheet metal forming parts through deep-drawing/stretch-forming processes are inefficient, requiring extensive manual effort and time, with iterative processes leading to high rejection rates and resource consumption, due to the lack of automated and flexible tools design in Computer-Aided-Design systems.
Innovation Solution
A computer-assisted method that defines geometry models and operators to automate the description and optimization of forming processes, allowing for the automatic propagation of changes across geometry stages and tool parameters, enabling structured representation and processing of forming stages through associating geometry areas with process operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual planning and modeling are used in CAD systems, then flexibility and adaptability are maintained, but productivity is low and time consumption is high
Solution Approach 1:
The patent uses template-based geometry models that can be copied and adapted for different tool designs. Standardized forming tool templates store pre-defined geometric structures and process parameters, allowing rapid replication and modification rather than manual creation from scratch, thereby improving productivity while maintaining design flexibility
Solution Approach 2:
The system enables automated parameter optimization by adjusting geometric parameters, material properties, and process conditions through algorithmic evaluation. The computer system automatically modifies parameters such as tool geometry, forming forces, and process sequences to optimize tool design, reducing manual iteration while maintaining adaptability through parametric control
2Manufacturing precision
If iterative design processes are used, then design accuracy can be improved, but loss of time and resource consumption increase significantly
Solution Approach 1:
The patent performs preliminary simulations and virtual validations of tool designs before actual manufacturing. The computer system executes forming simulations, stress analyses, and process validations in the virtual environment, identifying and correcting design issues before physical tool production, thereby reducing iterative rework and accelerating the development timeline while maintaining precision
Solution Approach 2:
The system implements automated feedback loops where simulation results and validation data continuously inform design adjustments. The computer system analyzes simulation outcomes, automatically adjusts geometric parameters and process conditions, and re-evaluates designs, creating an efficient closed-loop optimization process that reduces manual iteration cycles while improving forming accuracy
3Manufacturing precision
If detailed 3D surface modeling is performed manually, then manufacturing precision is improved, but device complexity and time consumption increase
Solution Approach 1:
The patent employs template-based 3D surface modeling where standardized forming tool geometries and part surfaces are stored as reusable templates. These templates contain pre-defined surface characteristics, feature libraries, and geometric constraints that can be automatically instantiated and adapted, reducing manual modeling effort while maintaining high geometric accuracy through standardized, validated template structures
Solution Approach 2:
The system replaces manual interactive modeling operations with automated algorithmic surface generation. Computer algorithms automatically generate complex 3D surfaces from 2D drawings, parametric definitions, or point clouds, eliminating the need for manual surface construction while achieving high precision through mathematical surface definitions and automated geometric computations
Data Source
AI summary
Processing steps are determined and optimized during the production of sheet metal forming parts, for example, using deep drawing/stretch forming processes. During the determination, using a computer-assisted design system, of process operations (PO1-PO6) for the description of forming processes on a forming part, the following steps are carried out:defining geometry models for the computerized description of a geometry of the forming part in a target state;defining several geometry operators (m1-m9, e1-e6), wherein one geometry operator (m1-m9, e1-e6) associates a geometry of an area of a first geometry model with a geometry of an area of a second geometry model, and the geometry operator (m1-m9, e1-e6) describes a transition from one of the two associated geometries to the other one; anddefining several groups of respectively at least one geometry operator (m1-m9, e1-e6), wherein each one of the groups is respectively associated with a process operation (PO1-PO6).