As new technologies and advanced networks play an increasing important role in manufacturing, man... more As new technologies and advanced networks play an increasing important role in manufacturing, many enterprises are suffering from unknown and unpredictable situations, termed “uncertainties”. The aim of this paper is to provide an approach to evaluate the importance of uncertainties in Cloud Manufacturing. The Simple Multi-Attribute Rating Technique (SMART) was used in this research to assess uncertainties that exist in Cloud Manufacturing. Additionally, a Microsoft Excel assessment tool has been developed to help decision makers identify uncertainties and determine the weight of uncertainty in Cloud Manufacturing.
Kurzfassung Das spezielle Verfahren des BTA-Tiefbohrens wurde entwickelt, um lange Bohrungen mit ... more Kurzfassung Das spezielle Verfahren des BTA-Tiefbohrens wurde entwickelt, um lange Bohrungen mit hoher Oberflächengüte herstellen zu können. Auf Grund der sehr geringen Steifigkeiten der dabei verwendeten schlanken Werkzeuge ergeben sich Probleme wie Rattern, Abweichungen im Mittenverlauf und Wellenbildung, die auch Drall genannt wird. Die Oberflächen- und Formfehler stellen eine erhebliche Schädigung des Werkstücks dar. Durch den Einsatz einer speziell an den schwer zugänglichen Prozess angepassten Sensorik wurde die noch weitgehend unbekannte Systemdynamik messtechnisch erfasst und mit Hilfe statistischer und mathematischer Methoden ausgewertet sowie modelliert.
Lightweight structures are an important element in today’s production industry. For the multi-axi... more Lightweight structures are an important element in today’s production industry. For the multi-axis milling of these structures some aspects have to be considered to achieve a good surface quality and to prevent damaging the milling machine during the machining process. In this article methods to determine suitable feed rates for the milling process, to identify parts of the workpiece with too much heat build-up, and to avoid collisions between workpiece and machine parts are presented. For this purpose a milling simulation based on a multi-dexel field workpiece model has been developed, in which two types of feed rate adaptation have been integrated. Work on a built-in temperature development simulation and collision control is in progress.
The Internet of Things (IoT) is continuously growing and is now reaching into the industrial envi... more The Internet of Things (IoT) is continuously growing and is now reaching into the industrial environment through new services such as remote maintenance for machine tools. Industrial applications of IoT require an increased awareness of security at all times. It is not only necessary that the data is exchanged securely; also the design of the hardware of the devices themselves needs to be considered. Security has to be designed right from the start into the IoT devices rather than added on later. This paper lays the foundation for the creation of a modular safe remote monitoring and maintenance system for machine tools through IoT devices at the hardware level. This article introduces a fully modular secure data acquisition system design approach with greater versatility, ready to be used in modern IoT manufacturing environments or for safe upgrading of existing legacy machinery.
As new technologies and advanced networks play an increasing important role in manufacturing, man... more As new technologies and advanced networks play an increasing important role in manufacturing, many enterprises are suffering from unknown and unpredictable situations, termed “uncertainties”. The aim of this paper is to provide an approach to evaluate the importance of uncertainties in Cloud Manufacturing. The Simple Multi-Attribute Rating Technique (SMART) was used in this research to assess uncertainties that exist in Cloud Manufacturing. Additionally, a Microsoft Excel assessment tool has been developed to help decision makers identify uncertainties and determine the weight of uncertainty in Cloud Manufacturing.
Kurzfassung Das spezielle Verfahren des BTA-Tiefbohrens wurde entwickelt, um lange Bohrungen mit ... more Kurzfassung Das spezielle Verfahren des BTA-Tiefbohrens wurde entwickelt, um lange Bohrungen mit hoher Oberflächengüte herstellen zu können. Auf Grund der sehr geringen Steifigkeiten der dabei verwendeten schlanken Werkzeuge ergeben sich Probleme wie Rattern, Abweichungen im Mittenverlauf und Wellenbildung, die auch Drall genannt wird. Die Oberflächen- und Formfehler stellen eine erhebliche Schädigung des Werkstücks dar. Durch den Einsatz einer speziell an den schwer zugänglichen Prozess angepassten Sensorik wurde die noch weitgehend unbekannte Systemdynamik messtechnisch erfasst und mit Hilfe statistischer und mathematischer Methoden ausgewertet sowie modelliert.
Lightweight structures are an important element in today’s production industry. For the multi-axi... more Lightweight structures are an important element in today’s production industry. For the multi-axis milling of these structures some aspects have to be considered to achieve a good surface quality and to prevent damaging the milling machine during the machining process. In this article methods to determine suitable feed rates for the milling process, to identify parts of the workpiece with too much heat build-up, and to avoid collisions between workpiece and machine parts are presented. For this purpose a milling simulation based on a multi-dexel field workpiece model has been developed, in which two types of feed rate adaptation have been integrated. Work on a built-in temperature development simulation and collision control is in progress.
The Internet of Things (IoT) is continuously growing and is now reaching into the industrial envi... more The Internet of Things (IoT) is continuously growing and is now reaching into the industrial environment through new services such as remote maintenance for machine tools. Industrial applications of IoT require an increased awareness of security at all times. It is not only necessary that the data is exchanged securely; also the design of the hardware of the devices themselves needs to be considered. Security has to be designed right from the start into the IoT devices rather than added on later. This paper lays the foundation for the creation of a modular safe remote monitoring and maintenance system for machine tools through IoT devices at the hardware level. This article introduces a fully modular secure data acquisition system design approach with greater versatility, ready to be used in modern IoT manufacturing environments or for safe upgrading of existing legacy machinery.
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Papers by Jorn Mehnen