Wednesday, August 1, 2012

Model Based Definition

Many large automotive and aerospace companies are switching to a design process called model based definition (MBD) where the 3D data model now includes all the 2D content once shown on drawings. Basically, instead of having a CATPart file and a CATDrawing file (in CATIA) there is now only a CATPart file which contains all the information and attributes from the 2D file.

Producing 2D drawings for every part is very time consuming due to drawing creation and assurance processes. By incorporating information close to the actual product and consolidating annotations on 3D, the design intent is shared with the production site more easily. New product manufacturing verification and maturity is also improved.
A working drawing is needed for parts manufacturing and it specifies the quality, functions and conditions of the part before it gets delivered to the assembly line. It’s been proven that 3D annotated models improve the quality of the design of the product. 3DA stands for 3D annotated or 3D attributes. Information shown on the 3D model includes shape, thickness, material, and tolerances. There are several macro functions which can make life easier when dealing with 3D annotations, like my code to send all annotations to PowerPoint for easy printing.
Do you have any specific questions about model based definition? What companies that you know of are or are in the process of switching to MBD? I’d love to hear from you in the comments below.

Don't forget to enter out contest to win a free copy of VB Scripting for CATIA V5!

No comments:

Post a Comment

I'd love to hear from you!