3D Tolerance Analysis via Combined Variation and FEA
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 3D tolerance analysis methods for mating parts are time-consuming and expensive due to their trial-and-error nature, often resulting in unacceptable gaps and deformations, especially when dealing with complex shapes and varying tolerances, and may provide conflicting or ambiguous results.
Innovation Solution
A system and method combining variation analysis and finite element analysis to determine geometric and dimensional tolerances by applying simulated forces to mating surfaces, allowing for the prediction of deformation parameters without recursive simulation processes, thereby reducing simulation time and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional trial-and-error assembly procedures are used, then engineers can identify assembly imperfections, but the process becomes time-consuming and expensive
Solution Approach 1:
The patent applies preliminary action by performing tolerance analysis and deformation prediction before actual assembly. The system calculates deformation parameters and predicts assembly gaps using computational models, allowing engineers to identify and correct potential assembly imperfections in the design phase rather than through time-consuming trial-and-error physical assembly attempts.
2Manufacturing precision
If multiple tolerance values are applied in sequential procedures, then comprehensive tolerance analysis is achieved, but the process becomes time-consuming and may provide conflicting results
Solution Approach 1:
The patent merges multiple tolerance analysis procedures into a single integrated computational framework. The system combines variation analysis with deformation analysis in one unified process, simultaneously considering multiple tolerance values and their interactions, thereby eliminating the need for sequential execution of separate procedures and avoiding conflicting results.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting deformation parameters based on applied loads and tolerance variations. The system modifies geometric parameters and material properties in the computational model to reflect different tolerance scenarios, enabling comprehensive tolerance analysis through parameter variation rather than multiple sequential procedures.
3Measurement precision
If traditional estimation procedures are used, then engineers can obtain tolerance values, but the process is time-consuming and expensive
Solution Approach 1:
The patent replaces traditional mechanical estimation procedures with computational modeling. Instead of relying on manual calculations and physical prototypes, the system uses finite element analysis and computational algorithms to estimate tolerance values and predict deformation, significantly reducing time and cost while maintaining or improving accuracy.
Data Source
AI summary
This disclosure is generally directed to 3D tolerance analysis. In one exemplary method, a combination of a variation analysis procedure and a finite element analysis (FEA) procedure is executed by a computer. The variation analysis procedure involves determining a first simulated force for effecting a mating between a first surface of a first part and a first surface of a second part. A first set of deformation parameters is determined by applying the first simulated force to the first surface of the first part. The FEA procedure involves determining a second simulated force for effecting the mating between the two surfaces based on one or more assembly loads. A second set of deformation parameters is determined by applying the second simulated force to the first surface of the first part. Various deformation parameters of the mated assembly can be obtained by combining the first and second set of deformation parameters.