Wolfgang Beitz

Evaluation of a compact CAD course in laboratory experiments

With the increasing deployment of CAD, the necessity of instructing employees in the use of such systems grows; short training periods are desirable. The authors developed a compact course of 40‐hours duration in which 32 individuals (engineering students) were instructed on a 2‐dimensional CAD system; a subsequent investigation of the achievements of the course was made with the use of laboratory experiments. In qualitative and quantitative respects the performance achieved using CAD during a drawing task was lower than that attained by the same individuals at the drawing board. A compact course of the described extent can only be the basis for self‐instruction. Interrelations between the quality of the results and the method of work exist. With regard to the performance, the variance among individuals was distinctly higher at the CAD terminal than at the drawing board. A prediction concerning the achievements of the course drawn from the performance at the drawing board, especially when based on quanti...

Customer Integration im Entwicklungs- und Konstruktionsprozeß

Fur eine verstarkte Kundenorientierung beim Entwicklungs- und Konstruktionsprozes werden methodische Ansatze aufgezeigt, wie sie sich aus der Prozeskette der Produktentstehung und -nutzung und einer bewahrten Konstruktionsmethodik ergeben. Es wird eine Aktionsgemeinschaft Kunde-Vertrieb-Entwicklung vorgeschlagen.

Management systems and program concepts for an integrated CAD process

A new model for the process of machine design is proposed. The model consists of the following three components: PDM, product-defining models; PDD, product-defining data; and OP, operational principles. Using these main components, the complete design process can be presented in an operation structure (OS). Any system for integrated and flexible CAD that is based on this model must support all steps of the design process.

Modeling methods for a flexible computer-aided embodiment design system

The investigation and implementation of product modeling methods are two of the most important research objectives in the field of computer-aided engineering design. Commercial product modeling systems go beyond geometric modeling systems in that they are adapted to user requirements through the addition of systems that aid in the generation of engineering models and methods. The embodiment design of a mechanical energy storage system serves as an example of future continuous and flexible computer-aided design (CAD). This example is implemented with GEKO, a user system for the layout of design elements. GEKO is coupled with a commercial geometric modeler (CATIA) and uses several programming interfaces.

Entwicklung und Konstruktion

Ein technisches Produkt durchlauft einen Lebenszyklus, der Grundlage fur Aktivitaten beim Produkthersteller und Produktanwender ist.

Experimental comparison of CAD systems by stressor variables

The report is based on a study of various CAD systems used in eight different departments of mechanical engineering. The study aims at comparing the application of CAD systems by different stressor variables (design task, design/operational characteristics of the CAD system, environmental variables) and their effect on the strain of the designer measured by psychophysiological and psychophysical data. In both single and multiple experiments, continuous measurements of psychophysiological parameters (strain measurements) can be correlated to different stress situations in the various phases of the design process and/or operation of the CAD system. As a result, different strain reactions are registered depending on the type of CAD system used and on the respective design phases.

Design for material saving

Abstract In order to save material several design principles are explained. These are derived from the properties of material, the kind of mechanical stress, the solution to the design problem, the structure, the manufacturing technology and the product use. The recommendations have a more qualitative and strategic character and have to be optimized and adapted to the individual designs. With a design the engineer strongly influences the required amount and kind of material necessary to build the product. Using several examples, this article gives an overview of the general strategies and principles for a material-saving design, which helps to combine knowledge of mechanics and design methodology and supports their application in industry.

Entwickeln von Baureihen und Baukästen

Ein wesentliches Mittel zur Rationalisierung im Konstruktions- und Fertigungsbereich ist die Entwicklung von Baureihen [35].

Process of Planning and Designing

In the previous two chapters we examined the fundamentals on which design work should be built to best advantage. They form the basis of a systematic approach which practising designers can follow, regardless of their speciality. The approach is not based on one method but applies known and less well known methods where they are most suitable and useful for specific tasks and working steps.

Produktentwicklung mit modernen Methoden und Arbeitsmitteln

Moderne Entwicklungs- und Konstruktionstechnik ist durch eine Systematik im Ablauf des Arbeitsprozesses, durch die Anwendung neuester relevanter Erkenntnisse und Methoden sowie durch den Einsatz der DV-Technik gekennzeichnet. Zur effizienten Nutzung dieser Moglichkeiten ist ein geplanter und durchgangiger Arbeits- und Datenflus mit Hilfe eines rechnerintegrierten Konstruktionsleitsystems zweckmasig, das zu den jeweiligen Arbeitsschritten Methoden, Modelle und Daten aus einem Speicherbereich abrufbar enthalt. Teilbereiche eines solchen Entwicklungs- und Konstruktionssystems konnen als wissensbasiertes System aufgebaut sein und damit eine weitgehend automatische Aufgabenbearbeitung ermoglichen. Im Interesse der Anwendungsflexibilitat und der Kreativitatsforderung sind aber zahlreiche Dialog- und Entscheidungsschritte durch den Konstrukteur erforderlich.