Machining centres are machine tools for universal use that are able to perform a range of processes, such as milling, turning and drilling. They can be used in automated production lines and for custom manufacture of single parts or small batches. Where components are larger, the loading and adjustment of the blanks and retrieval of the components after machining is often associated with high stresses for operators, such as unfavourable constrained postures, high forces, and the handling of heavy weights. Good accessibility of the loading area and the straightforward use of auxiliary lifting equipment during these tasks is therefore very important.
[Hinweis: Die Darstellung enthält zahlreiche gewerbliche Schutzrechte in Form von Geschmacks-, Gebrauchsmustern und Patenten, die im Namen verschiedener Gesellschaften des DMG MORl-Konzerns geschützt sind.]
Standards relevant to milling machines and machining centres can be found on NoRA by use of the following search terms:
The Technical Report ISO/TR 22100-3 describes how ergonomic principles can be applied during the risk reduction process according to ISO 12100 and how ergonomics standards can be applied to machinery. It helps designers take decisions with respect to ergonomics during the machine design process and can also be used when no relevant type C standards are available.
When work is performed inside machine tools, the machine geometry often necessitates the assumption of unfavourable body postures. In order to clamp the components in place, the worker must often lean in a long way, and when changing tools manually, possibly also stretch and work overhead. Minor modifications to the machine geometry may be effective here in reducing unfavourable body postures (see also EN 1005-4).
The bottom of the DMG DMU 125 machine housing is recessed. This provides the operator with greater legroom, and he or she can adopt a position closer to the machine. Unfavourable body postures, such as leaning in a long way, can thus be reduced (see EN 12417:2009, Table 2; EN 13128:2009, Table 5; EN ISO 14738:2009, Section 9.1).
