3D Object Constraint-Zone Deformation for Surface Fit
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Solution Overview
Problem
Current 3D modeling techniques face challenges in customizing complex products to conform to specific surfaces while maintaining detailed model proportions and mechanical functionality, especially in applications like knee braces and head padding, where zones need to adapt to different constraints.
Innovation Solution
The method involves receiving 3D objects and target objects, applying zone definition and constraint zone selection to generate a deformed model through topological graph analysis and parametrization, allowing for extrinsic and intrinsic rigid and non-rigid zone processing to ensure fit and manufacturability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional parametric modeling is used to customize complex products, then shape customization is achieved, but model complexity and development time increase significantly
Solution Approach 1:
The patent segments the 3D model into multiple zones with different constraint levels (rigid zones, flexible zones, and free zones). This segmentation allows different parts of the model to be customized independently, reducing overall model complexity while maintaining adaptability. The constrained template modeling approach divides the template into zones that can be selectively deformed or kept fixed based on functional requirements.
Solution Approach 2:
The patent applies local quality by assigning different constraint properties to different zones of the model. Rigid zones maintain original proportions and structural integrity, while flexible zones allow deformation to conform to target surfaces. This localized differentiation enables complex customization without requiring the entire model to be highly complex.
2Adaptability or versatility
If complex products are customized to conform to specific surfaces, then surface adaptation is improved, but structural integrity and detailed model proportions may be compromised
Solution Approach 1:
The model is segmented into rigid zones that preserve original proportions and structural integrity, and flexible zones that adapt to target surfaces. This segmentation allows simultaneous maintenance of manufacturing precision in critical areas and surface adaptation in non-critical areas.
Solution Approach 2:
Different constraint qualities are applied locally to different zones. Rigid zones enforce strict proportionality and structural constraints, while flexible zones allow surface conformality. This local differentiation resolves the contradiction between surface adaptation and manufacturing precision.
3Adaptability or versatility
If multiple zones with different constraints are applied to a 3D object, then functional requirements are met, but the processing complexity and time increase
Solution Approach 1:
The patent performs preliminary actions by pre-defining the template with segmented zones and constraint properties before the customization process. This pre-processing establishes the framework for efficient processing, allowing rapid application of constraints during actual customization without requiring complex real-time calculations for each zone.
Solution Approach 2:
The segmentation of the model into predefined zones with specific constraint types enables parallel processing and reduces the computational burden. Each zone can be processed independently according to its constraint type, reducing overall processing time compared to a unified complex constraint system.
4Manufacturing precision
If traditional modeling techniques are used for digital fabrication, then manufacturing capability is maintained, but customization precision and constraint compliance decrease
Solution Approach 1:
The patent creates a constrained template model that copies essential structural features and constraints from the original design. This template serves as a reusable foundation that maintains manufacturing capability while enforcing precision constraints. The template can be instantiated and customized multiple times without recreating the entire model each time.
Solution Approach 2:
The patent uses parameter changes to control the degree of constraint application across different zones. By adjusting constraint parameters (such as rigidity factors, deformation limits, and boundary conditions), the system maintains manufacturing capability while achieving high constraint compliance. These parameters can be modified to balance manufacturing ease with precision requirements.
Data Source
AI summary
A method and system for providing the ability to deform and adapt a 3D model and associated 3D object to comply with a set of extrinsic and intrinsic constraints to guarantee function and fit with respect to a 3D target object. The method includes simplifying the 3D object with a topological simplification, identifying a number of constraint zones according to defined characteristics such as external rigid and non-rigid zones and internal rigid and non-rigid zones, and modifying the 3D model with respect to the constraint zones.