Additive Manufacturing Mesh Validation for Shape Constraints
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Additive manufacturing systems face part quality issues due to thermal non-uniformities and inconsistencies caused by material-dependent and apparatus-dependent shape constraints, such as minimum distances and energy distribution, leading to over-fusing and reduced quality of printed objects.
Innovation Solution
A validation method is implemented to check 3D mesh model data against material-dependent and apparatus-dependent shape constraints, including minimum object distances, isolated volumes, and object density distributions, before printing, to ensure compliance and prevent part quality issues by adjusting object positions and densities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additive manufacturing systems print objects without validation against shape constraints, then productivity is improved by avoiding pre-print processing, but manufacturing precision deteriorates due to thermal non-uniformities and over-fusing
Solution Approach 1:
The patent performs validation of 3D mesh model data against material-dependent and apparatus-dependent shape constraints before the printing process begins. This preliminary action identifies potential quality issues (such as objects too close together causing over-fusing) and allows corrective measures to be taken before material is wasted and before printing starts, thus enabling high-speed printing without sacrificing quality.
2Manufacturing precision
If validation processing is performed on 3D mesh model data before rendering or voxelization, then manufacturing precision is improved by preventing part quality issues, but loss of time increases due to additional pre-print processing
Solution Approach 1:
The validation is performed at the 3D mesh model data level before rendering or voxelization occurs. This timing is critical because it catches issues early in the data pipeline when corrections are most efficient. The validation checks object distances, orientations, and other parameters against shape constraints, preventing quality issues before they manifest in the final print.
3Productivity
If objects are placed closer together in the build volume, then productivity is improved by increasing build volume utilization, but manufacturing precision deteriorates due to thermal non-uniformities and over-fusing
Solution Approach 1:
The patent establishes material-dependent shape constraints including minimum object distances that account for thermal effects and material properties. These parameters are validated against the 3D mesh model data to ensure objects are positioned at appropriate distances from each other, preventing over-fusing while maximizing build volume utilization. The constraints are derived from material properties and apparatus characteristics.
4Manufacturing precision
If validation against material-dependent shape constraints is performed, then manufacturing precision is improved by preventing over-fusing, but device complexity increases due to additional validation requirements
Solution Approach 1:
The patent defines material-dependent shape constraints based on material properties such as thermal conductivity, melting point, and fusing characteristics. These parameters are used to calculate minimum object distances and other geometric constraints that prevent over-fusing. The validation system checks whether the 3D mesh model data satisfies these constraints, ensuring consistent fusing quality without requiring complex hardware modifications.
Data Source
AI summary
In an example, mesh model data representing at least a portion of a print job to be generated by an additive manufacturing apparatus by solidifying build material is received at a processor. Using a processor and based on the mesh model data, it is validated whether the three-dimensional print job described by the mesh model data conforms with at least one of material-dependent shape constraints and apparatus-dependent shape constraints of the additive manufacturing apparatus. If the result of the validation is positive, the mesh model data is rendered, using a processor for manufacturing the three-dimensional print job by an additive manufacturing apparatus. If the result of the validation is negative, a predetermined action is performed.