Molding DFM Analyzer Example

Table of Contents

• Overview
• Implementation
• Example output
• Files

Demonstrates how to perform molding design analysis on a 3D model and print information about found issues and their parameters in a console.

Overview

In this example demonstrates how to perform molding design analysis on a 3D model using molding dfm analyzer tool (DFMMolding_Analyzer). For this purpose, used a console application that imports a model, traverses through unique ModelData::Part , creates and runs DFMMolding_Analyzer, groups and prints information about found issues and their parameters into console. Molding design analysis will be performed for each unique ModelData::Part , but only for the scope of accepted geometries.

Application needs 1 input argument to run:

Usage: molding_dfm_analyzer <input_file>, where:
    <input_file> is a name of the file to be read

For more information about molding design analysis visit Injection Molding Design for Manufacturing (DFM) page.

Implementation

PartProcessor class is inherited from SolidProcessor and overrides ProcessSolid method that are used to run design analysis on given shape.
Visit Model Explore Helper Implementation page for more information about base SolidProcessor class implementation.

using namespace cadex;
 
class PartProcessor : public SolidProcessor
{
public:
    void ProcessSolid (const ModelData::Solid& theSolid) override
    {
        // Set up recognizer
        Molding_FeatureRecognizerParameters aRecognizerParameters;
        aRecognizerParameters.SetMaxRibThickness (30.0);
        aRecognizerParameters.SetMaxRibDraftAngle (0.2);
        aRecognizerParameters.SetMaxRibTaperAngle (0.1);
        
        Molding_FeatureRecognizer aRecognizer(aRecognizerParameters);
 
        //Set up analyzer
        Molding_Analyzer anAnalyzer;
        anAnalyzer.AddTool (aRecognizer);
 
        // Fill molding data
        Molding_Data aData = anAnalyzer.Perform (theSolid);
 
        // Run dfm analyzer for found features
        DFMMolding_AnalyzerParameters aParameters;
        DFMMolding_Analyzer aDFMAnalyzer (aParameters);
        auto anIssueList = aDFMAnalyzer.Perform (aData);
        PrintIssues (anIssueList);
    }
};

To traverse only unique parts of the imported model, the ModelData::ModelElementUniqueVisitor class is used.

PartProcessor aPartProcessor;
ModelData::ModelElementUniqueVisitor aVisitor (aPartProcessor);
aModel.Accept (aVisitor);

After performing design analysis, the object of FeatureGroupManager class is used to group and sort found issues. For this purpose, there is a traverse through all found issues and add each of them to FeatureGroupManager with a specified name.

using namespace cadex;
 
for (size_t i = 0; i < theIssueList.Size(); ++i) {
    const auto& anIssue = theIssueList[i];
 
    if (anIssue.IsOfType<DFMMolding_IrregularCoreDepthScrewBossIssue>()) {
        aManager.AddFeature ("Irregular Core Depth Screw Boss Issue(s)", "Screw Boss(es)", true, anIssue);
    } else if (anIssue.IsOfType<DFMMolding_IrregularCoreDiameterScrewBossIssue>()) {
        aManager.AddFeature ("Irregular Core Diameter Screw Boss Issue(s)", "Screw Boss(es)", true, anIssue);
    } else ...
}

After adding all found issues to FeatureGroupManager, a Print method of the manager is used to print information about found issues and their parameters in a console. PrintFeatureParameters is created to explore and print issue parameters. It uses as an input parameter of Print method.

using namespace cadex;
 
auto PrintFeatureParameters = [] (const MTKBase_Feature& theIssue)
{
    if (theIssue.IsOfType<DFMMolding_IrregularCoreDepthScrewBossIssue>()) {
        const auto& aICDSBIssue = static_cast<const DFMMolding_IrregularCoreDepthScrewBossIssue&> (theIssue);
        FeatureGroupManager::PrintFeatureParameter ("actual height",     aICDSBIssue.ActualHeight(),    "mm");
        FeatureGroupManager::PrintFeatureParameter ("actual core depth", aICDSBIssue.ActualCoreDepth(), "mm");
    } else if (theIssue.IsOfType<DFMMolding_IrregularCoreDiameterScrewBossIssue>()) {
        const auto& aICDSBIssue = static_cast<const DFMMolding_IrregularCoreDiameterScrewBossIssue&> (theIssue);
        FeatureGroupManager::PrintFeatureParameter ("expected min core diameter", aICDSBIssue.ExpectedMinCoreDiameter(), "mm");
        FeatureGroupManager::PrintFeatureParameter ("expected max core diameter", aICDSBIssue.ExpectedMaxCoreDiameter(), "mm");
        FeatureGroupManager::PrintFeatureParameter ("actual core diameter",       aICDSBIssue.ActualCoreDiameter(),      "mm");
    } else if ...
};
    aManager.Print ("issues", PrintFeatureParameters);

Visit Feature Group Helper Implementation page for more information about FeatureGroupManager class implementation.

Example output

Below is an example output for model from ./examples/models/Part3.stp.

Model

Example output

Model: Part3 Part #0 ["Part3"] - solid #0 has: High Rib Issue(s): 3 3 Rib(s) with expected max height: 11.7371 mm actual height: 29 mm High Screw Boss Issue(s): 3 1 Screw Boss(es) with expected max height: 3.50883 mm actual height: 50 mm 1 Screw Boss(es) with expected max height: 5.775 mm actual height: 30 mm 1 Screw Boss(es) with expected max height: 18 mm actual height: 30 mm ... Total issues: 84

Files

• C++: All files
• C#: All files
• Java: All files
• Python: All files