Nozzle-Automation

Parametric CD Nozzle Generator (Python + SolidWorks API)

A Python-powered automation script to generate 3D convergent-divergent (CD) nozzle models in SolidWorks based on user-defined dimensions.
(Note: The main automation code is private; this repository showcases the project workflow, demo, and results.)

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Badges

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Features

• Fully automated nozzle creation in SolidWorks
• Parametric design: input inlet diameter, throat diameter, exit diameter, length, and wall thickness
• Educational and portfolio showcase
• Demonstrates SolidWorks API automation workflow
• Repeatable and smooth nozzle models

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Requirements

• Windows OS
• SolidWorks 2020 or later
• Python 3.8+
• pywin32 package (only if running the automation code privately)

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📸 Demo

Annotated CD nozzle with inlet, throat, exit, and smooth spline shape.

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How It Works

1. User manually inputs nozzle parameters (all in mm):
   • Inlet diameter
   • Throat diameter
   • Exit diameter
   • Length
   • Wall thickness
2. Python script (private) communicates with SolidWorks via COM API
3. The script automatically:
   • Sketches the 2D nozzle outline with spline and reference lines
   • Revolves the sketch to create 3D geometry
   • Applies shell feature to create wall thickness
4. SolidWorks displays the finished 3D nozzle

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Example Parameters

• Inlet diameter: 60 mm
• Throat diameter: 30 mm
• Exit diameter: 100 mm
• Length: 240 mm
• Wall thickness: 1.5 mm

Midpoints between inlet-throat and throat-exit are automatically calculated to create smooth nozzle profile.

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Usage (Private Code)

The Python automation script is private and not included in this repository.

To run locally (if you have access):

1. Install Python 3.8+ and pywin32
2. Open SolidWorks 2020+
3. Run the script and input nozzle parameters as prompted
4. Observe the automated model generation in SolidWorks

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Result

Notes

COM (Component Object Model): A Microsoft technology that allows software components to communicate and share functionality within Windows.

API (Application Programming Interface): A set of rules and functions that lets one program use features of another program.

COM API in SolidWorks: Enables automation by allowing Python (or other languages) to control SolidWorks: create sketches, extrude, revolve, cut, set views, and save files—all programmatically.

PyWin32: A Python package that acts as a bridge between Python and Windows COM objects. It allows Python to control Windows applications like SolidWorks, Excel, Word, etc.

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