SOLIDWORKS COM Interface

Automate SOLIDWORKS using Python and COM on Windows.

Connection Setup

import win32com.client

# Connect to SOLIDWORKS
sw = win32com.client.Dispatch("SldWorks.Application")
sw.Visible = True

# Get active document
model = sw.ActiveDoc

Creating Parts

# Create new part
model = sw.NewDocument(
    sw.GetUserPreferenceStringValue(24),  # Part template
    0, 0, 0
)

# Get model doc
part = sw.ActiveDoc

# Select front plane
part.Extension.SelectByID2("Front Plane", "PLANE", 0, 0, 0, False, 0, None, 0)

# Create sketch
part.SketchManager.InsertSketch(True)

# Draw rectangle
part.SketchManager.CreateCornerRectangle(0, 0, 0, 0.1, 0.05, 0)

# Exit sketch
part.SketchManager.InsertSketch(True)

# Extrude
feat_mgr = part.FeatureManager
feat_mgr.FeatureExtrusion2(True, False, False, 0, 0, 0.02, 0, False, False, False, False, 0, 0, False, False, False, False, True, True, True, 0, 0, False)

Modifying Features

# Select feature
part.Extension.SelectByID2("Extrude1", "BODYFEATURE", 0, 0, 0, False, 0, None, 0)

# Get feature
feat = part.SelectionManager.GetSelectedObject6(1, -1)

# Edit dimension
dim = feat.GetDefinition.GetDepth(True)

Assemblies

# Create assembly
assy = sw.NewDocument(sw.GetUserPreferenceStringValue(25), 0, 0, 0)
assy_doc = sw.ActiveDoc

# Insert component
assy_doc.AddComponent5(
    "C:\\parts\\base.SLDPRT",
    0,  # Configuration
    "",  # Config name
    False,
    "",
    0, 0, 0  # Position
)

# Add mate
assy_doc.Extension.SelectByID2("Face1@base-1", "FACE", 0, 0, 0, False, 1, None, 0)
assy_doc.Extension.SelectByID2("Face2@top-1", "FACE", 0, 0, 0, True, 1, None, 0)
assy_doc.AddMate5(0, 0, False, 0, 0, 0, 0, 0, 0, 0, 0, False, False, 0, None)

Export

# Export to STEP
part.Extension.SaveAs(
    "C:\\output\\model.step",
    0,  # Version
    1,  # Options
    None,
    None,
    None
)

# Export to STL
part.SaveAs3(
    "C:\\output\\model.stl",
    0, 2
)

Batch Processing

import os

for file in os.listdir("C:\\parts"):
    if file.endswith(".SLDPRT"):
        path = os.path.join("C:\\parts", file)
        sw.OpenDoc(path, 1)
        model = sw.ActiveDoc
        # Process model
        sw.CloseDoc(model.GetPathName())