Durcrete / AMB Stability in machine beds with ultra-performance concrete

Editor: Briggette Jaya

Nanodur is an innovative ultra-high-performance concrete (UHPC) that meets the strictest requirements and one of its uses is in machine beds.

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A 3D-measuring machine made of granite – one of the test specimens of cementious Nanodur concrete.
A 3D-measuring machine made of granite – one of the test specimens of cementious Nanodur concrete.
(Source: Durcrete)

The concrete deformation stability of machine beds made of Nanodur, an innovative ultra-high-performance concrete (UHPC), meets the strictest requirements, as reported in a study conducted at the Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University in Germany. Moreover, Nanodur concrete has other advantages over machine beds made of conventional materials such as grey cast iron or welded steel, according to the study. Germany-based Durcrete, a specialist for cement-based cast mineral in machine construction, will be demonstrating these advantages at AMB. Visitors will also be able to get detailed information on the test results of the study.

The load-bearing and supporting elements of a machine tool are the machine beds mounted on the machine foundations and integrated into the tooling machines, not the machine foundations, Durcrete notes. And mounted on these base frames are the individual functional elements, such as the linear guiding rails and the drive units.

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The size and design of these elements is dependent on the process required. Machine beds range from masses of less than one metric tonne to large-sized dimensions. The selection of the materials used is critically significant for the functionality of a machine bed. Apart from production-engineering and economic factors, mechanical characteristics of various materials play a key role as they determine the characteristics of the component used. Young’s modulus is an important factor that influences elastic deflection as well as material damping and thermal behaviour. Long-term geometrical consistency – only minimal plastic deformation after application of a load – is a prerequisite for all component materials used. If this prerequisite is not met, the linear guiding rails lose their evenness and parallelism.

Today, advanced UHPC is solidly established in machine construction. In addition to its cost-effectiveness, this concrete offers benefits related to the vibration and thermal behaviour of machine tools and has replaced conventional materials like grey cast iron and welded-steel components.

At AMB, Durcrete will be in at the Foyer of the East Entrance, Booth 408.

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