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schaeffler0819EMO Hall 7 stand C46

technical articles

A complete virtual image of powertrains and gearboxes is only possible if gear, roller bearing and gear specialists are yours simulation models digitally link with each other. Therefore, the cross-company and cross-system data exchange is one of the most important prerequisites for the generation of Digital Twins. Schaeffler and SEW have created such a data exchange.

For the design and simulation of gearboxes, however, several specialized software and CAE tools have become established on the market. Each of these programs has its specific priorities. The problem: The exchange of gear data between manufacturers and their suppliers is often still manual and leads to complex duplication.

Schaeffler has now replaced this manual data exchange between the CAE tools with SEW-Eurodrive and the FVA (Forschungsvereinigung Antriebstechnik eV) with electronic data transmission using a standardized interface for transmission data. This eliminates the multiple modeling of gears. This greatly reduces development time and creates the basis for generating digital twins, which can be used, for example, to analyze operating data in the context of Industrie 4.0 solutions.

Standardized data format

REXS (Reusable Engineering Exchange Standard) The format mentioned in the 1.1 version offers uniform modeling and nomenclature for any gearbox with helical, bevel and planetary stages and its components. REXS is currently integrated into the FVA Workbench as of version 5.0, in the Schaeffler Bearinx Bearings Analysis Tool in the current versions, and in the gear calculation program "Wesilab" by SEW. Even providers of commercial CAE tools have already implemented the REXS interface or plan to introduce it with the next release. At the click of a mouse, a REXS file is simply generated from the gearbox models.

Schaeffler now offers the automated exchange of gearbox data with the help of the REXS interface. Users receive calculation results from Bearinx much faster, significantly accelerating their development process. Stephan Evert, Head of Bearing Analysis Tools Development for R & D Bearings at Schaeffler, emphasizes: "With the help of REXS, we can reduce the cost of software-engineering coupling of CAE tools and simulations while simplifying IT architectures "And continues:" REXS can be used by the transmission industry as a standard data container for the generation of digital twins. "

Accelerated application development

Transmission manufacturers with a large proportion of customer-specific application development benefit greatly from digitized data exchange with their suppliers. "The goal is to be able to efficiently and effectively use different systems with their own computational focus", Dr. Heinrich Bolz, Head of Calculation and Simulation in Development Gearboxes at SEW-Eurodrive, explains about the open-source project: "With REXS, transmission data can be transmitted quickly and without errors. The interface thus makes a significant contribution to optimizing our innovation process. "

The REXS interface is license-free at There you will also find all other information about the current and future development. At the Schaeffler booth, visitors can see for themselves how easily the data models can be exchanged between CAE tools.

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