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.

class PartProcessor(shape_processor.SolidProcessor):
    def __init__(self):
        super().__init__()
 
    def ProcessSolid(self, theSolid: mtk.Solid):
        # Set up recognizer
        aRecognizerParameters = mtk.Molding_FeatureRecognizerParameters()
        aRecognizerParameters.SetMaxRibThickness (30.0)
        aRecognizerParameters.SetMaxRibDraftAngle (0.2)
        aRecognizerParameters.SetMaxRibTaperAngle (0.1)
 
        aRecognizer = mtk.Molding_FeatureRecognizer(aRecognizerParameters)
 
        # Set up analyzer
        anAnalyzer = mtk.Molding_Analyzer()
        anAnalyzer.AddTool(aRecognizer)
 
        # Fill molding data
        aData = anAnalyzer.Perform (theSolid)
 
        # Run dfm analyzer for found features
        aParameters = mtk.DFMMolding_AnalyzerParameters()
        aDFMAnalyzer = mtk.DFMMolding_Analyzer(aParameters)
        anIssueList = aDFMAnalyzer.Perform(aData)
 
        PrintIssues(anIssueList)

To traverse only unique parts of the imported model, the ModelData_ModelElementUniqueVisitor class is used.

aPartProcessor = PartProcessor(anOperation)
aVisitor = mtk.ModelData_ModelElementUniqueVisitor(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.

for anIssue in theIssueList:
    if mtk.DFMMolding_IrregularCoreDepthScrewBossIssue.CompareType(anIssue):
        aManager.AddFeature("Irregular Core Depth Screw Boss Issue(s)", "Screw Boss(es)", True, anIssue)
    elif mtk.DFMMolding_IrregularCoreDiameterScrewBossIssue.CompareType(anIssue):
        aManager.AddFeature("Irregular Core Diameter Screw Boss Issue(s)", "Screw Boss(es)", True, anIssue)
    elif ...

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.

def PrintFeatureParameters(theIssue: mtk.MTKBase_Feature):
    if mtk.DFMMolding_IrregularCoreDepthScrewBossIssue.CompareType(theIssue):
        aICDSBIssue = mtk.DFMMolding_IrregularCoreDepthScrewBossIssue.Cast(theIssue)
        feature_group.FeatureGroupManager.PrintFeatureParameter ("actual height",     aICDSBIssue.ActualHeight(),    "mm")
        feature_group.FeatureGroupManager.PrintFeatureParameter ("actual core depth", aICDSBIssue.ActualCoreDepth(), "mm")
    elif mtk.DFMMolding_IrregularCoreDiameterScrewBossIssue.CompareType(theIssue):
        aICDSBIssue = mtk.DFMMolding_IrregularCoreDiameterScrewBossIssue.Cast(theIssue)
        feature_group.FeatureGroupManager.PrintFeatureParameter ("expected min core diameter", aICDSBIssue.ExpectedMinCoreDiameter(), "mm")
        feature_group.FeatureGroupManager.PrintFeatureParameter ("expected max core diameter", aICDSBIssue.ExpectedMaxCoreDiameter(), "mm")
        feature_group.FeatureGroupManager.PrintFeatureParameter ("actual core diameter",       aICDSBIssue.ActualCoreDiameter(),      "mm")
    elif ...

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

Table of Contents

Overview

Implementation

Example output

Files