Now showing 1 - 10 of 12
  • Publication
    Steuerungsintegration von Überwachungsverfahren
    ( 1995)
    Spur, G.
    ;
    Krüger, J.
    ;
    Suwalski, I.
    Integration of monitoring procedures into the CNC. The mounting demands made on the performance of modern machine tools require an ever growing amount of functionality to be included into the machine's environment. Here, monitoring of the machining process plays a vital part. This article discusses the criteria for integrating machine monitoring systems into the CNC and describes the resulting demands on the monitoring system and on open controls.
  • Publication
    Diagnose fettgeschmierter Hauptspindellager
    (Hanser, 1994)
    Feil, A.
    Für die hochbeanspruchte Maschinenkomponente Hauptspindeleinheit wird in der vorliegenden Arbeit ein Diagnosesystem vorgestellt, das gleichzeitig mehrere Gefährdungszustände an fettgeschmierten Wälzlagern erkennt. Zur Beurteilung des Schmierungszustandes wird dazu eine neue Meßmethode angewendet, die bei gleichzeitiger Berücksichtigung des aktuellen Vorspannungszustandes der Lagerung und des Laufflächenzustandes der Wälzlager eine vollständige Beurteilung des Lagerzustandes ermöglicht. Der experimentellen Verifikation der Meßmethode folgt eine Synthese, indem die erzielten Ergebnisse in Form einer prototypischen Realisierung eines Diagnosesystems umgesetzt werden. Durch Interpretation charakteristischer Veränderungen des Schmierungszustandes, des Vorspannungszustandes und des Laufflächenzustandes kann das Diagnosesystem selbstständig einen Gefährdungszustand des Lagers feststellen. Das Diagnosesystem dient der Informationsunterstützung des Bedienungspersonals, das im Falle einer Störun g Auskunft über den Zustand der Spindellager benötigt, um zustandsabhängig vorbeugende Instandsetzungsmaßnahmen einleiten zu können.
  • Publication
    Werkstückorientierte Entwicklung von Werkzeugmaschinen
    ( 1994)
    Spur, G.
    ;
    Stelzer, C.
    ;
    Sanft, C.
    The design of machine-tools which have been optimized for the process in question not only requires the recognition of technological trends. It is just as important to make forecasts on the properties of parts to be produced in the future in order to design production systems accordingly. The present article introduces results from forecasts intended to support a part-related development of machine-tool concepts.
  • Publication
    Thermische Isolation mit Zirkonoxid
    ( 1993)
    Spur, G.
    ;
    Kranz, A.
    A changing temperature causes undesirable geometrical deformation of machine components. This article shows a design-oriented method to influence the thermal behaviour of machines. Using isolating material enables to direct the flow of heat. The results of an experiment, conducted on a machine tool spindle with a liner of zirconium oxide, illustrate the effects of thermal isolation.
  • Publication
    Rechnerunterstützte Angebotserstellung im Werkzeugmaschinenbau.
    ( 1993)
    Krause, F.-L.
    ;
    Abuosba, M.
    ;
    Golm, F.
    ;
    Schlingheider, J.
    By optimizing the configuration activities in development processes, the aim is to save time and cost and to increase the quality. This article presents a conception of how to apply the configuration in the area of elaborating offers along with a description of a realized computer-aided system.
  • Publication
    Konzepte zur Erhöhung der Prozeßtransparenz durch Verbesserung der Zugänglichkeit
    ( 1992)
    Carbon, M.
    ;
    Heisig, P.
    The article presents three proposal of redesign of machine tools to support the operator in gaining experience knowledge about the milling and turning process of CNC-Machine tools, which are developed within the Research-project "Computer-supported experience guided work in production-CeA".
  • Publication
    Konstruktionskatalog zur Optimierung des thermischen Verhaltens von Werkzeugmaschinen. Tl.1 - Aufbau des Katalogs, Spindelbaugruppe.
    ( 1992)
    Spur, G.
    ;
    Kranz, A.
    Part 1: Structure of the catalogue and spindle-bearing system. The present state of research in the field of thermal behaviour of machine tools has been documented by the Laboratory for Machine Tools and Production Engineering (WZL) of the Technical University Aachen, the Research Centre for Machine Tools Chemnitz and the Institute for Machine Tools and Manufacturing Technology (IWF) of the Technical University Berlin. Measures for improving the machine tool design were documented in a catalogue, which consists of the parts basics, spindle-bearing system, frame components, drive system, measuring systems, and compensation. These parts will be introduced by the participants in three articles in this magazine. In the following article the structure of the catalogue and the spindle-bearing system are discussed.
  • 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.
  • Publication
    Haupt- und Vorschubantriebe an Werkzeugmaschinen - Gezielte Auswahl erhöht Produktivität
    ( 1989)
    Spur, G.
    ;
    Knupfer, S.
    Electric motors are nowadays used as driving motors to produce the main and the feed movements of machine tools almost withour exception. As there have been great advances in the electrical power control and the signal processing a multiple number of motors exists on the market to realize the required movements. The article describes different kinds of electric motors and their specific application to machine tools. Moreover, the whole driving system including the elements motor, power control unit, position and speed gauging system and control circuit has to be inspected.
  • Publication
    Von der Drehmaschine zum autarken Drehzentrum
    ( 1989)
    Lehmann, W.R.
    The development of the turning machine is characterized by an increasing degree of automation, capacity and flexibility. This is particularly true for the turning machines which have become self-sufficient turning centres with driven tools, the possibility of using multiple cutting dunctions, higher speed frequencies and tool and workpiece changing systems. Ergonomic and easy to operate control systems are just as important as systems for simulation and optimization of the munufacturing processes prior to real machining. The state of the art which has been achieved in this field meanwhile is documented by the VDI-Z-data base of turning machines comprising data of over 500 CNC turning machines. Evaluations of this data base - some examples given in this paper show some of the possibilities - can lead to valuable results both for munfacturers and users.