Part Surface Geometry Analysis With Mesh-Aligned Reflection Lines
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Solution Overview
Problem
Existing methods for geometric analysis of manufacturing processes or simulations suffer from visual artefacts that distort reflection lines, making it difficult to assess the quality of the part's shape due to artefacts from computer representations.
Innovation Solution
A computer-implemented method that retrieves a result model and a reference model, transforms the mesh of the reference model to match the shape of the result model, and performs a geometric analysis using the improved result model to maintain alignment with part features and reduce artefacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the mesh of the reference model is used directly for geometric analysis, then the analysis can be performed quickly, but visual artefacts distort the reflection lines and degrade the quality of the analysis
Solution Approach 1:
The patent applies preliminary action by transforming the mesh of the reference model to match the shape of the result model before performing the geometric analysis. This pre-processing step ensures that the mesh alignment is established in advance, preventing visual artefacts from distorting the reflection lines during the analysis phase.
Solution Approach 2:
The patent introduces an intermediary transformation process that maps the reference model mesh to the result model shape. This intermediary step acts as a mediator between the original reference model and the final analysis, ensuring proper alignment while maintaining the integrity of the geometric features.
2Measurement precision
If the mesh of the reference model is transformed to match the shape of the result model, then artefacts are reduced and analysis quality improves, but the processing time and computational complexity increase
Solution Approach 1:
The mesh transformation is performed as a preliminary action before the geometric analysis, allowing the computationally intensive operation to be completed once rather than iteratively during analysis. This reduces the overall processing time by establishing proper mesh alignment in advance.
Solution Approach 2:
The patent creates a transformed copy of the reference model mesh that matches the result model shape. This copied and transformed mesh is then used for analysis, allowing the original reference model to remain unchanged while providing an accurately aligned version for geometric analysis.
3Loss of information
If a CAD model is modified locally to represent defects, then the representation accuracy improves, but the same artefact issues arise in the modified regions
Solution Approach 1:
The patent uses the transformed mesh as an intermediary representation that preserves the alignment with the result model shape while avoiding direct modification of the CAD model. This intermediary approach allows defect representation without introducing the artefact issues that arise from local CAD model modifications.
Solution Approach 2:
Instead of modifying the original CAD model, the patent creates a copied and transformed version of the reference model mesh that accurately represents the result model shape including defects. This copying approach preserves the original CAD model integrity while providing an accurate representation for analysis.
Data Source
AI summary
A computer-implemented method and device are directed to a geometric analysis of a result of a manufacturing process or of a simulation of a manufacturing process in which a part (14) is formed from a planar sheet of material by means of a tool (1). The result comprises result model, being a computer based representation of the part after the (real or simulated) manufacturing process. The method comprises the computer-implemented steps ofretrieving the result model (2);retrieving a reference model (3), the reference model being a mesh based model derived from a CAD model representing a target shape of the part or a tool shape;determining an improved result model (33) by transforming the mesh of the reference model (3) to match the shape of the result model (2);performing a geometric analysis on the basis of the improved result model (33).