Convert OBJ to SLDASM

Understanding OBJ and SLDASM file formats

OBJ is a widely used 3D geometry definition file format developed by Wavefront Technologies. It stores 3D model data, including vertices, texture coordinates, normals, and faces, and is supported by many 3D graphics applications. SLDASM is a SolidWorks Assembly file, used by Dassault Systèmes SolidWorks CAD software to represent assemblies of multiple 3D parts (SLDPRT files) and their relationships.

Why convert OBJ to SLDASM?

Converting an OBJ file to SLDASM is often necessary when you want to use 3D models created in other software within a SolidWorks assembly. This allows for further editing, simulation, or integration into larger engineering projects.

How to convert OBJ to SLDASM

Direct conversion from OBJ to SLDASM is not natively supported in most software, as OBJ files contain mesh data while SLDASM files represent assemblies of parametric parts. The typical workflow involves importing the OBJ file into SolidWorks, converting it to a part, and then creating an assembly if needed.

Step-by-step conversion process using SolidWorks

1. Open SolidWorks.
2. Go to File → Open and select your OBJ file. You may need to change the file type filter to see OBJ files.
3. SolidWorks will import the OBJ as a graphics body. Use the Insert → Features → Convert to Mesh Body or Insert → Features → Import Diagnostics to repair and convert the mesh if needed.
4. Save the imported part as a SLDPRT file.
5. Create a new assembly via File → New → Assembly.
6. Insert the converted part(s) into the assembly.
7. Save the assembly as a SLDASM file.

Recommended software for OBJ to SLDASM conversion

• SolidWorks – The best and most reliable tool for this conversion, as it natively supports SLDASM files and can import OBJ files with some limitations.
• Autodesk Fusion 360 – Can import OBJ files and export to formats compatible with SolidWorks, such as STEP or IGES, which can then be assembled in SolidWorks.
• FreeCAD – An open-source alternative that can import OBJ files and export to STEP, which can be used in SolidWorks for assembly creation.

Tips and limitations

• OBJ files are mesh-based and do not contain parametric or assembly data, so manual assembly creation is required in SolidWorks.
• Complex OBJ meshes may require simplification or repair before successful import.
• For best results, use high-quality OBJ files and ensure all necessary textures or materials are included if needed.