Convert 3DXML to CATPART

CATIA V5 and some 3DEXPERIENCE workflows require a native .CATPart for part editing, drawings, manufacturing, and downstream CAD operations. Conversion is needed when a lightweight .3dxml exchange model must become a CATIA part that can be saved, measured, or edited.

What the 3DXML format is

3DXML is Dassault Systèmes’ XML-based exchange format for 3D models, assemblies, product structures, metadata, and visualization data. It is used in CATIA, 3DEXPERIENCE, ENOVIA, DELMIA, supplier exchanges, technical documentation, and design reviews.

A .3dxml file can contain exact boundary-representation geometry, tessellated display geometry, assembly references, or only a lightweight visualization. The extension does not identify which type of data is included, so inspect the file before choosing a conversion method.

What the CATPART format is

.CATPart is CATIA V5’s native part-document format. It can store sketches, constraints, parameters, solids, surfaces, feature history, manufacturing data, and external references.

CATPart is suitable for CATIA Part Design and Generative Shape Design, drawings, precise measurements, toolpath preparation, and insertion into a .CATProduct assembly. A translation does not normally recreate the source feature tree: an exact imported body may remain a non-parametric imported shape, while a mesh may require reverse engineering and may not support accurate downstream operations.

How to convert 3DXML to CATPART

Using CATIA V5

1. Install a CATIA V5 release and license that provide the required 3DXML interoperability functions. Support varies by release, workbench, and configuration; a standard CATIA installation is not guaranteed to open every 3DXML representation.
2. Open or import the file using the 3DXML command available in that installation. Depending on the release, the workflow may use File → Open, an interoperability command, or insertion of a 3DXML representation.
3. Inspect the specification tree and geometry. Confirm that the source contains a usable solid or precise surfaces rather than only a visualization mesh. For a product-level file, identify the component that must become a separate part.
4. Use the installed import or conversion operation to create CATIA geometry when the loaded data is only an external or visualization representation. The command name and output options differ between CATIA V5 releases.
5. Save the resulting part with File → Save As, select CATPart, and write a file such as model.CATPart. If CATPart is unavailable as an output type, changing the extension manually will not convert the file.
6. Reopen the saved part and check solid closure, units, orientation, bounding-box dimensions, critical measurements, mass properties, and any required links or metadata.

Using a commercial translator

Datakit CrossManager is a dedicated desktop CAD translator that supports 3DXML input and can provide CATIA-compatible output in supported configurations. Select the 3DXML file, choose CATPart as the target format if offered by the installed license and version, configure assembly and geometry options, then run the translation. Verify the vendor’s current format matrix before purchase because support can vary by release and by whether the source contains exact or tessellated data.

Other commercial translators, including CAD Exchanger products, may read 3DXML and export neutral formats such as STEP. Native CATPart export is product- and version-dependent, so confirm it before relying on that workflow. If direct CATPart output is unavailable, export STEP AP242 or STEP AP214, open the STEP file in CATIA, and save it as CATPart. This normally creates imported geometry without the original parametric history.

Using 3DEXPERIENCE

In 3DEXPERIENCE, open or import the file through the assigned CATIA or design application, convert the representation into a design part when it contains usable exact geometry, and use the platform’s export or save operation to create a CATPart. The required role, command, and file behavior depend on the tenant release and whether the data is a managed platform object or an imported file.

Online conversion options

There is no broadly dependable online service for direct 3DXML-to-CATPart conversion. General-purpose file converters usually do not write native CATPart files, and uploading proprietary CAD data to an unverified service can expose confidential geometry. Use an online converter only if its published format matrix explicitly lists both 3DXML input and CATPart output, and confirm its handling of exact geometry, assemblies, file retention, and confidentiality before uploading.

Quality and compatibility limitations

• Mesh input: Tessellated data cannot restore the original sketches, constraints, feature order, or mathematically exact faces. The result may remain faceted or require surface fitting and remodeling.
• Assembly structure: A product-level 3DXML can contain several components and placement data instead of one part. Convert components separately when separate CATPart files are required.
• Geometry: Gaps, invalid faces, small features, and unsupported surface types can prevent a watertight solid or alter measurements during translation.
• Metadata and links: Colors, names, attributes, publications, external references, assembly constraints, and links may not survive. Validate them independently of the geometry.
• Units and tolerances: Check the source units, bounding-box dimensions, and several known measurements after conversion. A unit interpretation error can produce a plausible-looking part at the wrong scale.
• Version compatibility: CATIA V5 releases may differ in 3DXML import and CATPart compatibility. Test the exact file in the target installation before starting a batch conversion.