Model Based Definition in Product Manufacturing

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Model Based Definition in Product Manufacturing - Friday, May 20, 2016

Model based definition (MBD), also referred to as digital product definition, can optimize product manufacturing. The idea is to incorporate both manufacturing and inspection information in 3D models, rather than creating multiple 2D and 3D drawings to meet manufacturing requirements.

The Future of MBD

In the world of product development, 2D drafting is undergoing a decline, as the popularity of 3D models rise. Of course, the manufacturing process still frequently utilizes 2D prints. But the advent of 3D software, and the innovations behind it, are slowly taking over where 2D models once reigned.

The idea behind model based definition is to incorporate manufacturing and inspection information in 3D models--as compared to developing separate 2D drawings from 3D models for manufacturing requirements. Instead of dealing with 2D prints, manufacturers could push 3D digital data right into CNC machines to craft the final product.

Right now, MBD can be found in use by many leading manufacturers. ASME published the ASME Y14.41-2003 Digital Product Definition Data Practices in 2003, adding revisions in 2012. The United States Department of Defense released MIL-STD-31000 Revision A to systemize the use of MBD as a standard requirement for technical data packages (TDP).

These standards define and annotate the 3D models to complete the model definition. The annotations align with the methodology utilized to manufacture 2D. It includes the finishes, tolerances, and treatments. These annotations provide a better way for manufacturing and inspectors, as well as vendors and customers, to effectively communicate in a common way.

Why Adopt MBD?

  • Cost: No longer will 2D prints need to be scrapped and reworked due to a lack of manufacturing info. The 3D digital data set would be enough to obtain the precise measurements needed--without the engineering drawings. All of the necessary information is marked on the model itself, making identification of specific areas effortless.
  • Time Savings. Less reworks mean more monetary savings. The time it normally took to rebuild 2D manufacturing plans is no longer an issue. Manufacturers can get products to the market faster and with less issues.
  • Quality. There’s no longer a disconnect between engineering teams and manufacturing teams. Now, they both rely on one 3D model, instead of switching between a 2D and 3D product. Such easy communication results in a reduced chance for error and far better accuracy.
What's the downside?
  • IncompatibilityMBD will not work within every manufacturing plant. For some specialized cases, 2D drawings are the only option.
  • Cost, for some cases. Sometimes, utilizing model based definition is not going to be as cost effective for certain types of products. Manufacturers will have to compare the costs to decide if it is right for their plant.

Manufacturers who find that MBD will fit in with their manufacturing goals will have a powerful new tool. Cost effective, time saving, and budget friendly, model based definition can boost product manufacturing and help streamline the process.

Those that do implement MBD should use a more gradual approach in the beginning, to help teams of engineers and manufacturers become familiar with the new process. Start with design reviews and quotes. After that, switch out the 2D prints for the 3D models entirely--and enjoy the new hassle-free approach.

Digital Machining Systems always has an eye toward the future. Request a free quote today.


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