Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK

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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.

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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.

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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".

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Marktübersicht Drehmaschinen

1989 , Jerissen, H.D. , Lehmann, W.R. , Schulte, H.J.

The State of the Art which has been achieved in turning machines and turning centres is documented. The data base comprising the data of over 500 CNC turning machines.

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Diagnose fettgeschmierter Hauptspindellager

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.

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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.

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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.

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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.

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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.

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Arbeitssicherheit an Drehmaschinen

1989 , Lehmann, W.R.

The development of the machine tools is characterized by an increasing degree of automation, capacity and flexibility. With higher speed frequencies and more links particulary in the tool system increase the requirements at the safety. For the workpiece system of a turning machine the determination of hazards and the reasons of them are described exemplary. Algorithm for calculating the energy of releasing elements are given. The use of constructive measures can prevent or reduce possible damage.

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