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A comparision of model and signal based condition monitoring and mode separation for predictive maintenance of feed drives

100%

Maier D. , Heisel U.

tom Vol. 11, No. 4

138--151

Modern production strategies increase the demand for closer monitoring of the machine's condition. Especially wear affects its condition. This paper deals with the methodology of condition monitoring that can be based on different sources of data such as controller NC CNC and additional sensors. Two main methods for assessment are signal analysis based exclusively on measurement data and a model based method The latter is based on comparing the simulation of the objects behaviour with the acquired data. Ball screw drives are key elements of machine tools. They considerably contribute to the machine's performance. The paper compares two signal-based wear inducing characteristics and discusses the results. Afterwards a model-based approach is discussed.

Stand der Technik und Potentiale de HSC-Technologie

100%

Heisel U. , Stehle T.

tom vol. 22, nr 4

59-77

Opisano możliwości i zastosowanie obróbki z dużymi prędkościami (HSC). Przedstawiono stan wiedzy dotyczący zastosowania tej technologii do obróbki materiałów wykorzystywanych w różnych dziedzinach przemysłu. Dokonano przeglądu obrabiarek spełniających wymagania technologii HSC. Wskazano, że do HSC mają zastosowanie również heksapody - obrabiarki o nowoczesnych, niekonwencjonalnych rowiązaniach konstrukcyjnych.

Experimental Investigation into Parameters Influencing Roll Tensioning of Circular Saw Blades

80%

Heisel U. , Stehle T. , Ghassemi H.

Journal of Machine Engineering

2015

tom Vol. 15, No. 1

98--111

Circular saw blades are rolled in the shape of a ring by special roll tensioning machines to improve the static and dynamic behaviour of steel saw blades. Plastic deformation and strain hardening in the roller track area cause residual stresses in the circular saw blade, which influence the static stiffness and the natural frequencies of the circular saw blade. Roll tensioning is one of the important parts when producing circular saws, especially in the production of thin circular saw blades. Although the influence of the roll tensioning process on the static and dynamic properties is well-known, it is interesting to further investigate the parameters influencing the roll tensioning process. This paper presents the influence of various parameters on the roll tensioning process, such as material properties, rolling force, contact condition between roller wheels and circular saw blade. These investigations help to find the optimisation ability of this process and to gain a better understanding of the relationships between roll tensioning processes and improved static and dynamic properties of thin saw blades.