Part Fuse

Booleans

Common

Part

Part Union
Menu location
Part → Boolean → Union
Workbenches
Part
Default shortcut
None
Introduced in version
-
See also
Part Cut, Part Common

Description

The Part Union tool unites (fuses) selected Part objects into one. This operation is fully parametric and the components can be modified and the result recomputed.

This command allows you to perform quickly this Boolean operation.

Usage

1. Select two or more shapes
2. Invoke the Part Union command several ways:
   • Press the Part Union button in the Part toolbar
   • Use the Part → Boolean → Union entry in the Part menu

Supported inputs

Input objects must be OpenCascade shapes. Examples: stuff made with Part, PartDesign, Sketcher workbenches. Not meshes (unless those were converted to shapes) - for meshes, there are specific Boolean tools in MeshDesign workbench.

• Solid + Solid: the result is a solid that occupies all the volume covered by the inputs

• Shell + Shell, Shell + Face, Face + Face: the result is a shell. Where faces intersect, they are split. Shells can be non-manifold. After fusion, faces can be united by Refining the result.

• Wire + Wire, Edge + Wire, Edge + Edge: the result is a wire. Edges are split where they intersect.

Compounds are supported; however, it is assumed that shapes packed into a compound do not touch or intersect. If they actually do, Fusion will likely fail, or produce an incorrect result.

Options

Items can be added and removed from the fusion, by dragging them in or out of the fusion feature in the tree view with the mouse. A manual recompute (press F5 key or click on the recompute icon) is required to see the results.

After this operation it may be necessary to clean the shape with RefineShape.

Booleans

Common

Part

Part

• Primitives: Box, Cylinder, Sphere, Cone, Torus, Tube, Create primitives, Shape builder

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• Creation and modification: Extrude, Revolve, Mirror, Fillet, Chamfer, Make face from wires, Ruled Surface, Loft, Sweep, Section, Cross sections, 3D Offset, 2D Offset, Thickness, Projection on surface, Attachment

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• Boolean: Make compound, Explode Compound, Compound Filter, Boolean, Cut, Fuse, Common, Connect, Embed, Cutout, Boolean fragments, Slice apart, Slice, XOR

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• Measure: Measure Linear, Measure Angular, Measure Refresh, Clear All, Toggle All, Toggle 3D, Toggle Delta

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• Other tools: Import, Export, Box selection, Shape from Mesh, Points from mesh, Convert to solid, Reverse shapes, Create simple copy, Create transformed copy, Create shape element copy, Refine shape, Check geometry, Defeaturing, Appearance, Color per face

User documentation

• Getting started
• Installation: Download, Windows, Linux, Mac, Additional components, Docker, AppImage, Ubuntu Snap
• Basics: About FreeCAD, Interface, Mouse navigation, Selection methods, Object name, Preferences, Workbenches, Document structure, Properties, Help FreeCAD, Donate

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• Help: Tutorials, Video tutorials
• Workbenches: Std Base, Arch, Assembly, CAM, Draft, FEM, Inspection, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Start, Surface, TechDraw, Test Framework, Web

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• Addons: Addon Manager, External workbenches, Scripting and macros

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• Hubs: User hub, Power users hub, Developer hub