Im Optimierungsprozess einer Konstruktion und zur Variantenbildung ist die Nutzung der Parametrik für den Konstrukteur zum Standard und unverzichtbar geworden. Auslegungen und speziell die Festlegung von Abmessungen werden im Maschinenbau über die Umstellung von Analysegleichungen oder durch iterative Analysen, wie bspw. die numerische Optimierung durchgeführt. Die Mechanismenlehre ist eines der wenigen Fachgebiete, in denen speziell für die Auslegung klassische Syntheseverfahren entwickelt wurden. Im Zeitalter vollparametrischer CAD-Systeme erscheinen diese Verfahren in einem neuen Licht. Einfache getriebetechnische Kenntnisse sind für die Lösung von Führungs- und Bewegungsaufgaben zwar erforderlich, sind in Lehrbüchern, VDI-Richtlinien, TGL-Blättern usw. aber auch gut nachzulesen. Anhand einiger Beispiele soll hier gezeigt werden, wie diese klassischen grafischen Konstruktionsvorschriften auf einfache Weise in das CAD-System Pro/Engineer Wildfire integriert werden können. Der Konstrukteur kann seine Auslegung dynamisch interaktiv variieren und sogar verschiedene Gütewerte seines Getriebes dabei beobachten. Durch diese assoziative Komponente wird eine mehrparametrige Optimierung realisierbar. Im Vortrag wird an Beispielen gezeigt, dass ein CAD-Konstrukteur diesem Vorschlag folgen und das Verfahren anwenden kann, um einen ersten Entwurf vorzulegen. Eine weitgehende Verwendung von Zusatzmodulen, wie zum Beispiel Pro/Mechanica oder Pro/Mechanism, würde erst bei zusätzlichen Untersuchungen der Konstruktion erforderlich.

Das Menschmodell MANIKIN bietet dem Anwender neue Möglichkeiten in der Analyse des arbeitstechnischen Umfeldes in der bekannten Pro/ENGINEER Umgebung. Dazu kann auf eine anthropometrische Datenbank zurückgegriffen werden. Neben einfachen Analysen, wie Reichweite und Sichtfenster, steht auch ein umfangreiches Angebot an Ergonomie-Analysen zur Untersuchung von Arbeitsprozessen zur Verfügung. Diese basieren auf den bekannten Grundlagen wie RULA, SNOOK und NIOSH91. Weiterhin ist das Modell gut zur Animation von Menschen bzw. Mensch-Maschine-Interaktionen geeignet, wobei hier ein spezielles Wissen über den Aufbau und den Einsatz von Körpersperrbedingungen zuträglich ist.

Die vorliegende Publikation stammt aus der Reihe "Tipps und Tricks" im Umgang mit Pro Engineer. Es werden BMX-Funktionalitäten zur Dimensionierung eines Massenausgleiches algorithmisch dargestellt. Als Beispiel dient ein Schubkurbelgetriebe, welches bezüglich seiner Gestellkraftkomponenten analysiert wird. Mit Hilfe eines Lancaster-Ausgleiches kann die Lage des Massenschwerpunktes bezüglich der X- und Y-Komponente optimiert werden.

In dieser Präsentation wird das universelle FE-Modell eines Kegelrollenlagers vorgestellt. Mittels eines Pro/ENGINEER-Layouts, basierend auf dem Top-Down Designkonzept, kann automatisch innerhalb einer kurzen Bearbeitungszeit ein geprüftes und lauffähiges FE-Modell eines Kegelrollenlagers abgeleitet werden. Dieses Modell kann z.B. in großen Getriebemodellen eingebaut werden, um eine quasistatische Betrachtung mit korrekten Lagersteifigkeiten zu ermöglichen.

Überblick der Animationsmöglichkeiten in Creo 1.0

Developments in cutting tools, coolants, drives, controls, tool changers, pallet changers and the philosophy of machine tool design have made ground breaking changes in machine tools and machining processes. Modern Machining Centres have been developed to perform several operations on several faces of a workpiece in a single setup. On the other hand industry requires high value added components, which have many quality critical features to be manufactured in an outsourcing environment as opposed to the traditional in-house manufacture. The success of this manufacture critically depends on matching the advanced features of the machine tools to the complexity of the component. This project has developed a methodology to represent the features of a machine tool in the form of an alphanumeric string and the features of the component in another string. The strings are then matched to choose the most suitable and economical Machine Tool for the component’s manufacture. Literature identified that block structure is the way to answer the question ‘how to systematically describe the layout of such a machining centre’. Incomplete attempts to describe a block structure as alphanumeric strings were also presented in the literature. Survey on sales literature from several machine tool suppliers was investigated to systematically identify the features need by the user for the choice of a machine tool. Combining these, a new alphanumeric string was developed to represent machine tools. Using these strings as one of the ‘key’s for sorting a database of machine tools was developed. A supporting database of machine tools was also developed. Survey on machining on the other hand identified, that machining features can be used as a basis for planning the machining of a component. It analysed various features and feature sets proposed and provided and their recognition in CAD models. Though a vast number of features were described only two sets were complete sets. The project was started with one of them, (the other was carrying too many unwanted details for the task of this project) machining features supported by ‘Expert Machinist’ software. But when it became unavailable a ‘Feature set’ along those lines were defined and used in the generation of an alphanumeric string to represent the work. Comparing the two strings led the choice of suitable machines from the database. The methodology is implemented as a bolt on software incorporated within Pro/Engineer software where one can model any given component using cut features (mimicking machining operation) and produce a list of machine tools having features for the machining of that component. This will enable outsourcing companies to identify those Precision Engineers who have the machine tools with the matching apabilities. Supporting software and databases were developed using Access Database, Visual Basic and C with Pro/TOOLKIT functions. The resulting software suite was tested on several case studies and found to be effective.

While conventional turbines have been extensively researched and tested, Tesla and boundary layer type turbines have not. In order to construct a dynamometer, thermodynamic flow apparatus and future turbines, we modeled the Tesla turbine using theoretical calculations and preliminary experiments. Thus a series of experiments were run to determine stall torque and maximum run speed for a known pressure range. This data was then applied to modeling formulas to estimate stall torque over an extended range of variables. The data were then used to design an appropriate dynamometer and airflow experiment. The model data also served to estimate various specifications and power output of the future turbine. An Obi Laser SSTG‐001 Tesla turbine was used in the experiments described. Experimental stall torque measurements were conducted in two stages. Shaft speed measurements were taken with an optical laser tachometer and Tesla turbine stall torque was measured using a spring force gauge. Two methods were chosen to model Tesla turbine stall torque: 1) flow over flat plate and 2) free vortex with a sink. A functional dynamometer and thermodynamic apparatus were constructed once the model was confirmed to be within the experimental uncertainty. Results of the experiments show that the experimental turbine at 65 PSI has a speed of approximately 27,000 RPM and a measured stall torque of 0.1279 N‐m. 65 PSI is an important data point because that data set is the cut‐off from laminar to turbulent flow. Thus at 65 PSI, a rejection of the null hypothesis for research question one with respect to the flow over flat plate method can be seen from the data, while the vortex model results in a failure to reject the null hypothesis. In conclusion, the experimental turbine was seen to have a laminar and a turbulent flow regime at different air pressures, rather than the assumed laminar flow regime. As a result of this model work, a new Tesla turbine of different dimensions was designed to adjust for flaws in the experimental turbine. The theoretical stall torque models were then applied to the new Tesla turbine design. Results of the models show that the vortex model sets the upper bound for theoretical stall torque for the new and the flat plate flow model sets the lower bound.

Diploma thesis deals with calculation and design study of air-cooled Wankel engine and simple mechanical stress of its main parts.

The vehicle body was measured by using ATOS 3D scanner. Measured data from the ATOS 3D scanner were applied to make a 3D model of vehicle body and to make a 3D model of whole vehicle by using computer program Pro/ENGINEER. The model of vehicle was made with a view for future use of CAD model. Surface of the vehicle model was used for computation of vehicle aerodynamics – aerodynamic static pressure distribution by using CFD software Star-CCM+.

The aim of this thesis is to propose a basic conception of passenger car chassis part with pneumatic drive (next only pneumobil). The pneumobil was designed mainly from BoschRexroth serial parts. The layout of this vehicle was arranged as dual-track with pneumatic drives with O 80 mm bore and stroke 125 mm. These engines are placed crossways top-down. Next I provided stress-strain analysis of rear bottom vehicle part, where act forces from rear wheels and pneumatic motor. The crucial task of this thesis is to design the chassis frame, choose suitable material and pneumatic motor for most effective usage of compressed air. The final goal is to propose an ideal gear ratio.