Page 34 - ITAtube Journal 2 2022

Press releases
MSG Maschinenbau GmbH
Generating the real Digital Twin of long products
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Figure 2: Ambiguity during straightness check acc. DIN EN 10305-5
Figure 1: Weightless contouringTM
MSG has developed a groundbreaking technology for objective contour scanning of long products, the so-called Weightless ContouringTM.
The combination of MSG’s 2D profiling systems together with its EP and US pat- ented straightness and twist measurement device, which continuously and objectively determines the straightness curve of long products in the weightless state, lead to the real Digital Twin (Figure 1).
1. Geometric requirements for straight- ness and twis
Straightness and twist are playing an important role in the manufacture of semi-finished products. Their requirements are defined jointly by manufacturers and users of long products in standardization committees.
In the field of manufacturing straightness is
of great importance to ensure problem-free downstream processes.
In the field of application, the area of use plays a key role. For example, ERW welded tubes (e.g., according to ASTM A513 or DIN EN 10305-5) with excessive deviations in their straightness and/or twist must be joined with increased effort in building constructions.
LSAW or SSAW welded large-diameter pipes (according to API 5L) are also examined for joining processes, especially regarding bent ends. A pipe that is too much deformed can only be integrated into a pipeline in the field with a great deal of effort.
Drill pipes should also have good straight- ness so that less friction is generated on the pipe surface during rotation due to cen- trifugal forces. Excessive resistance forces could also lead to breakage, for example.
Products deviating from the ideal contour that are used at high rotation speeds, e.g. in turbines, would lead to centrifugal forces and thus to vibrations that are harmful to the process.
In summary, it can be said that straighter bar products require less effort in further proceedings.
2. Definition of straightness and twisting in the state of the art
ITAtube Journal December 2023