.3dxml
What is .3dxml?
.3dxml is a proprietary 3D file format developed by Dassault Systèmes, used for representing three-dimensional models, assemblies, and related structural data in digital form. It is based on an XML structure and essentially functions as a compressed container file that includes both 3D geometry and product information, such as structure or BOM (Bill of Materials) data. In a manufacturing environment, .3dxml is particularly associated with the transfer of information between CAD systems and viewing applications.
.3dxml in Manufacturing Industry CAD Environments
In the manufacturing industry, .3dxml files are typically created using Dassault Systèmes CAD software, such as CATIA. The file format is used in situations where a 3D model needs to be shared for viewing without opening the original CAD data for editing. This is particularly useful for communication between, for example, a machine shop, a machining facility, and the customer, when there is a need to review a 3D model, assembly, or structure without CAM programming.
Structure and Content of a .3dxml File
Technically, .3dxml is a compressed archive that contains 3D representations in XML format or binary form. The file can include surface models or triangle-based mesh geometry. Surface data is stored so that a compatible viewer application can interpret it back into a continuous surface. Additionally, the file may contain simplified mesh data suitable for lightweight review, for example in production or assembly settings within a machine shop.
Viewing .3dxml and 3D Models in Machining Facilities
In machining facilities, .3dxml files are often used for viewing in dedicated 3D viewer applications. With these, a machinist or a supervisor can check the shape, dimensions, and assembly of a part without needing a full CAD license. This supports production planning, aids in understanding the machining process, and helps prevent errors, especially when the 3D model to be machined is not, for example, in STEP or STL format.
Limitations of .3dxml in Machining
While .3dxml is well-suited for viewing and sharing information, it is not a truly neutral transfer file for CNC machining. In machine shops, CAM programming is typically performed using formats such as STEP or Parasolid. .3dxml is not widely supported in CAM software and is generally not used directly for toolpath generation. Its role is mostly as a supplementary format for data transfer and model visualization.
Summary of the .3dxml File Format
.3dxml is a 3D file format developed by Dassault Systèmes, mainly used for viewing and sharing 3D models in the manufacturing industry. It is well-suited for reviewing 3D models but does not replace the CAD and CAM-compatible file formats used directly in machining. For machinists and machine shops, .3dxml provides an easy way to understand the geometry and structure of a part without the need for heavy software.
