Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK

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  • Publication
    Genauigkeit koordinierter Bahnbewegungen
    ( 1995)
    Spur, G.
    ;
    Feil, A.
    ;
    Schröer, K.
    Precision of coordinated path movements. Apart from motions which a machine element describes only translationally or rotationally, mainly those movements are of interest for mechanical engineering, specifically for handling and robot technology, which occur by an overlaying of elementary forms of movement. The time-related and geometrical deviations of actual from ideal movements along a path call for a systematic description. This article provides an overview of definitions of movement deviations and of the state of standardization.
  • Publication
    Diagnosis of grease lubricated main spindle bearings
    ( 1994)
    Spur, G.
    ;
    Feil, A.
    The spindle bearing system is a very critical component with regard to the unexpected failure of a machine tool. While the innfluence of many different operation conditions makes a reliable prediction of the life expectancy of spindle-bearings impossible, after an occured failure a long space of time will be needed for repair. A newly developed diagnosis system detects several critical states at the same time. The procedure serves for the determination of over-lubrication and under-lubrication, ageing of lubricant, pollution of lubricant by coolant or water as well as damage to the race surfaces due to abrasive wear or fatigue. Measuring the temperature at the outer bearing ring while the spindle is accelerating during a test-run is a suitable method for determine changes in the lubrication.
  • Publication
    Überwachung des Schmierzustands fettgeschmierter Hauptspindellager
    ( 1992)
    Spur, G.
    ;
    Feil, A.
    A newly developed diagnosis system detects several critical states at the same time (1). Te procedure serves for the determination of over-lubrication and under-lubrication, ageing of lubricant, pollution of lubricant by coolant or water, damage to the race surfaces due to abrasive wear or fatigue as well as overload. The experiments discussed in this article show, among other things, that the measuring of the temperature at the outer bearing ring is a suitable method for determine changes in the lubrication.