To join multiple 3D solid, surface, or region objects into a single, combined object in AutoCAD, you typically use the UNION command.
The UNION command merges selected 3D objects into one composite object. This is useful for creating complex shapes from simpler ones and for simplifying models by reducing the number of separate entities.
Steps to Join 3D Objects Using the UNION Command
Based on AutoCAD's functionality, the process is straightforward:
- Go to the Home tab on the ribbon.
- Navigate to the Solid Editing panel.
- Click the Union button. (Reference: Click Home tab Solid Editing panel Union. Find.)
- Select the 3D solid, surface, or region objects you want to combine. (Reference: Select the 3D solid, surface, or region objects to combine.)
- Press Enter to execute the command and complete the union operation. (Reference: Press Enter.)
Once the command is executed, the selected objects will be merged into a single, new 3D object. The original objects are removed, and a new unified object is created in their place.
Why Use the UNION Command?
- Simplify Models: Reduces the number of objects, making your drawing file smaller and potentially improving performance.
- Create Complex Shapes: Allows you to build intricate forms by combining basic primitives or extruded profiles.
- Prepare for Analysis/Manufacturing: Unified solids are often required for operations like meshing for finite element analysis or generating toolpaths for manufacturing.
Using the UNION command is the fundamental method in AutoCAD for combining 3D geometry effectively.
