How to Create a 3DCS Model?

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How to Create a 3DCS Model?

 

Steps to create and validate a 3DCS Model:

1.Modifying the assembly:

Clearly identify the number, location, nominal and assembly specifications of the Build Objectives or measurements to be analyzed.

Identify the number of assemblies, components, fixtures, or gages required in the tolerance path to analyze all the desired Objectives.

Load the appropriate release level assemblies or components into the appropriate NX, 3DEXPERIENCE, CATIA V5, SOLIDWORKS, Creo or Multi-CAD platform.

Create the product assembly tree in accordance to the manufacturing assembly process.

Create assembly fixtures or gauges where required.

2.Applying the Assembly Process:

Identify the functional features on each component and their relationships to the other components, assembly fixtures or gages.

Create the appropriate 3DCS move for each component and sub-assembly in accordance to the actual manufacturing process. (Hole-Pin Floats, Manual Adjustments,  Deformations or Conditional Assembly logic may require additional moves to be created)

Visually verify the component and assembly process behavior through the animation function.

3.Defining Tolerances:

Define part tolerances based on GD&T, actual part capability (CMM Data) or generic tolerances at functional surfaces and measurement locations.

Visually verify tolerance on the components features or points.

4.Build Objectives

Create individual measurements at each toleranced feature or point.  Run Simulation to assure toleranced points are within the specified range.

Create measurements between the target and object points/features for each move.  Run Simulation to assure that the object and target features are properly aligned or within the allowable hole to pin float.

Create the final Build Objectives at the specified locations.

Visually verify all measurements nominal and Vector Directions

5.Results

Execute Monte Carlo Statistical Analysis. Run Simulation.

Review the nominal, mean and 6 sigma of each measurement. Utilize other statistical outputs if non-normal distributions are identified.

Perform HLM Contributor Analysis and evaluate tolerance contributions for each measurement. Identify if each contributor is in the datum flow or tolerance loop.

6.Report the Results

Create a Report that indicates the assumptions utilized in the 3DCS model.

Create MTM notes and descriptions to describe each for understanding the model and the report.