Results 271 to 280 of about 13,467,897 (338)

A Textile Design System for Engineering Preforms

Polymers and Polymer Composites, 2000
A system is reported which automates the methodology needed to design complex 3D woven composite reinforcements. The system generates the design code enabling automatic preform manufacture on a conventional loom and provides specific data for composite modelling and analysis.
B.T. Hill, T.A. Soden, R. McIlhagger, L. Miller   +3 more
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Forging Preform Design-Ubet Based Methods

1985
The Upper Bound Elemental Technique, UBET, has been established as a useful procedure for load and metal flow prediction in axisymmetric closed-die forging and extrusion type processes.
M. I. Ghobrial, F. H. Osman, A. N. Bramley   +2 more
openaire   +1 more source

Reliability-based preform shape design in forging

Communications in Numerical Methods in Engineering, 2005
Summary: A reliability-based optimization method is developed for preform shape design in forging. Forging is a plastic deformation process that transforms a simple shape of workpiece into a predetermined complex shape through a number of intermediate shapes by the application of compressive forces. Traditionally, these intermediate shapes are designed
Repalle, Jalaja, Grandhi, Ramana V.
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Design Optimization for Dies and Preforms

2005
Abstract For forming processes, optimization goals range from tuning the process parameters while keeping geometry unchanged to finding optimal geometry for intermediate dies in a multistage forming operation. This article commences with a description on the three salient steps of optimization procedures: defining the objective function,
Anil Chaudhary, Suhas Vaze
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Fabric drape modelling and preform design

1998
As described in Chapter 6, on preforming, there are a variety of methods available for producing preforms for resin transfer moulding (RTM). Although there are a number of textile-based techniques which can be used to produce relatively complex preforms directly from yarns or rovings, these are usually limited to specific component geometries such as ...
Andrew C. Long, Chris D. Rudd
openaire   +1 more source

Computer-Aided Design of Preforms for Powder Forging

SAE Technical Paper Series, 1981
<div class="htmlview paragraph">An interactive computer-aided design technique has been developed which embodies design rules established from previous experience and experimental studies for the rapid design of powder preforms. Geometrical details of the part are first input along with a schematic sub-division into regions.
Suresh Pillay, Howard A. Kuhn
openaire   +1 more source

PILOT STUDY OF PREFORM DESIGN FOR SINTER FORGING

Powder Metallurgy, 1974
AbstractAn important difference between sinter forging and conventional forging is that of consolidation of the PM preform. It therefore follows that sinter forging would seem to be a hot-compaction process with some bulk metal plastic flow. The permitted amount of plastic flow is considerably less for a PM preform than for a preform produced from ...
T. J. Griffiths, W. Jones, M. Lundregan, M. B. Bassett   +3 more
openaire   +1 more source

A Novel Method to Design Preform Shape for Robo-forming

International Conference on Control, Decision and Information Technologies
This article introduces a frequency-based approach of obtaining preform shapes for multi-stage incremental robo-forming of sheet metals. Incremental sheet metal forming (ISF) is a die-less forming method that uses a general purpose single point tool ...
Srivardhan Reddy Palwai, S. Bharti, A. Tiwari, Hariharan Krishnaswamy   +3 more
semanticscholar   +1 more source

DIJA PROJECT: Forging Preforms Design Using Trade Knowledge

Geometric Modeling and Imaging--New Trends (GMAI'06), 2006
In this paper, we present a new method dedicated to hot forging. We show how to supply automatically the three-dimensional preforms sequence from the rough product. Our method uses a methodology coming from French forging industries. In particular, it implements rules and know-how related to this trade.
E. Brosse, Y. Gardan, E. Perrin
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Automatic design of a deep-drawn circumscribing preform

IEEE Transactions on Robotics and Automation, 1989
The authors describe a procedure for the automatic design of a preform based on circumscription algorithms. The procedure is defined in general terms and applied to preforms realized by axisymmetric deep-drawing processes. The automatic design procedure is supervised by a 'generate, test, and rectify' tactic.
G. Eshel, M.M. Barash, V. Chandru
openaire   +1 more source