Bombardier Transportation (Montreal, Quebec, Canada) is using Tecnomatix Technologies Ltd.’s (Herzeliya, Israel) eMPower quality software at its site in Derby, U.K.

The eM-TolMate software is part of a pilot project that will establish and refine the design processes to be used on all future vehicles. This project will study all the proposed design procedures and systems, from initial concept through final production. The aim is to streamline the assembly process before components enter production. The software will be used to simulate component assembly prior to manufacturing, leading to a better understanding of the implications of tolerances on individual components and enabling Bombardier to rule out potential manufacturing problems while still at the design stage.

The construction of railway rolling stock has traditionally been an activity where physical components are brought together and made to fit by manually reworking the part on the shop floor. This wasted effort can be reduced by improving component design, taking into account the way parts fit together, especially in regard to tolerance allowance.

Incorrect tolerance allowances can lead to variations in the build standard.

Traditional drawing tolerances are ambiguous and often require interpretation and extra information for assembly. Geometrical dimensioning and tolerancing communicates precise and unambiguous tolerance data. eM-TolMate enables designers to manage tolerances throughout the manufacturing process using a single model set. The software simulates the capability of assembling components, allowing design tolerances to be tested and validated. Engineers can also decide on the most effective and efficient assembly sequence prior to manufacture.

Bombardier is using eM-TolMate to optimize three aspects of vehicle design: control features, aesthetics and assembly. Control features ensure that all elements of the vehicle are manufactured within acceptable tolerance levels. Following this, the aesthetic appearance of a vehicle is enhanced if all parts fit together as closely as possible. Finally, optimization of the assembly process ensures that, from the first manufacturing run, all parts actually fit together correctly. Once this is achieved, making engineering changes after a vehicle or component reaches the shop floor can be greatly reduced.

For more information on manufacturing software, call 248-699-2500 or visit