Tolerance Analysis Reduces Assembly Costs

DCS Solutions have been used in the aerospace industry for more than 15 years. As the most used Tolerance Analysis software amongst aerospace OEMs, 3DCS Software has been applied to reduce shimming, improve final assembly and reduce costs associated with non-conformance. 

How are aerospace companies leveraging DCS Solutions to reduce their quality costs - scrap and rework?

Scroll down to find out.

In a typical section of an A320 Family Aircraft, roughly 90 stringer couplings are installed. Around 2/3 can be covered with the parametric model (this equals 60...couplings.

In the A319, A320 there are 4 section joints, while the A321 has 6. One parametrical model can then cover 180 assembly situations. 

Axel Siewert, AIRBUS

AEROSPACE INDUSTRY CASE STUDIES

Airbus -- Embraer 

[Excerpts from the DCS 2017 Global Technology Conference]

Airbus - Using Catia Parameters to Build 3DCS Assembly Simulation Models 

Axel Siewert, Dimensional Management Specialist at Airbus, joined DCS from France to discuss how Airbus is creating parameters for their models to allow for faster modeling and therefore, quicker answers to dimensional scenarios.

This is needed as Airbus expands their manufacturing and decreases their development cycles to meet the growing global demand for their products. 

Airbus’ Global Market Forecast for 2016-2035 offers a forward-looking view of the air transport sector’s evolution – this anticipates that air traffic will grow at 4.5 percent annually, requiring some 33,000 new passengers and dedicated freighter aircraft.

To support this growth, delivery rates are planned to reach new heights, assembly processes will change and new assembly lines will be built.

In order to deliver 'right the first day,' processes and assembly strategies need to be validated in advance prior to physical creation.

In shortening development cycles and condensed project plans, dimensional management needs to deliver answers fast and efficiently.

The parameterization of the assembly simulation models is one opportunity to reach this target in order to judge different geometrical scenario and input tolerances.

Embraer - Working With Large Models - Black Box Methodology

• A big model with a lot of MTMs and a big stack up can be replaced by some points and tolerances;
• Only final results can be shared with other companies. Modeling strategy and process tolerances are hidden;
• Several Black Box Scenarios can be done based on only one model Data Generator Model run;
• Heavy FEA Compliant models can be replaced by a few points (also optimizing FEA licenses).

• Depending on the result some curve fit must be done and some errors are generated;
• Some local datums must be created to measure the specific relationship between features;
• The original model is split, it’s necessary to manage two models;
• Some tricky higher-order interaction, if not detected, can be lost;
• On the black-box model, the sensitivity doesn't show the contributors (they are all bundled).

Learn more about Black Box Methodology in the DCS Webinar on how to use this technique 

Interested in more?

Contact DCS below to see the presentation details and find out firsthand how 3DCS can help your bottom line