DIN CEN/TS 13979-2:2011-12

Part 1 of this series of European Standards applies to monobloc wheels manufactured by forging and rolling. This process was the only authorized process accepted in the UIC regulations that were applicable in the recent past in most of the European countries. Cast wheels are commonly used by AAR networks and have been introduced into Europe on some applications for freight wagons. This Technical Specification defines the requirements linked to the casting process for the technical approval of a monobloc wheel. It follows the same methodology as Part 1. As this Technical Specification applies only to freight wagons and supports European interoperability, this Technical Specification defines in the informative Annex F the specific parameters for the thermomechanical assessment of a freight wagon wheel designed for European interoperability. This Technical Specification describes how to assess the wheel design. The application of the Technical Specification is essential to define the use of the wheel; this Technical Specification also states how to define this use. At least four aspects are described with different purposes: - a geometric aspect: to allow interchangeability of different solutions for the same application; - a thermomechanical aspect: to manage wheel deformations and to ensure that braking will not cause wheels to break; - a mechanical aspect: to ensure that no fatigue cracks occur in the web; - an acoustic aspect: to ensure that the solution chosen is as good as the reference wheel, for the use in question. For each of these three latter aspects, the rules proposed tend to limit the procedure; thus, the easier the objectives are to attain by the wheel under study. This Technical Specification does not cover assessment of the hub nor of the static mechanical dimensioning of the wheel. Most clauses of this Technical Specification are derived from Part 1. The only technical differences are linked to the particularities of the cast process.