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Thursday, May 14, 2020 | History

2 edition of computer system for axisymmetric forging dies found in the catalog.

computer system for axisymmetric forging dies

Gwan-Bin Yu

computer system for axisymmetric forging dies

by Gwan-Bin Yu

  • 183 Want to read
  • 6 Currently reading

Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D.) - University of Birmingham, Dept of Mechanical Engineering.

Statementby Yu, Gwan-Bin.
ID Numbers
Open LibraryOL13889521M

PDF | The CAD/CAM design system was used to create custom patterns for knee and elbow elastic bandages using a 3D Scan View 'Anthroscan Human | Find, read . Request PDF | Semiautomatic Surface Reconstruction in Forging Dies | The reuse of damaged stamps or forgingc dies is a key aspect of the forging process. Whenever a forging die must be repaired.

  The use of computational techniques is increasing day by day in the manufacturing sector. Process modeling and optimization with the help of computers can reduce expensive and time consuming experiments for manufacturing good quality products. Metal forming and machining are two prominent manufacturing processes. Both of these processes involve large deformation of elasto 5/5(2). cold forging of solid and hollow axisymmetric parts [5]. Eames et al. added an intelligent knowledge base to an integrated computer system for the sequence design of upset forging components that allows the designer to take advantage of design experience from past examples [6]. Hsu and Lee employed group technology in their.

  GEOMETRIC PARAMETER-: The starting workpiece geometry and the die geometry need to be defined in a closed-die forging modelling. Depending on its geometrical complexity, a forging process can be simulated either as a two-dimensional, axisymmetric or plane- strain, or a three-dimensional problem A typical starting workpiece geometry for a closed.   Cold forging die design and die design process optimization has been done by many authors using different techniques excellently. Still it is require getting the higher accuracy in the results, which can be achieved by optimizing the meshing and finding out the optimal aspect ratio of the elements by using Nueral Network for CAD/CAE die models.


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Computer system for axisymmetric forging dies by Gwan-Bin Yu Download PDF EPUB FB2

Summary. A system of programmes, for the design of axisymmetric hot forgings and dies, is described. The input to the system is a geometric description of the required as-machined part, from which the appropriate forging is designed on the basis of stored design rules and material files.

Subsequently, the billet size, forging load, flash geometry and forging tolerances to BSare Cited by: A particular example — discussed in the paper — involves the design of axisymmetric forging dies. The system developed uses a desk-top graphic computer system which is less expensive and within the reach of small by: 6.

In other cases, the forging has often to be lifted up with the help of an ejector set within the lower impression of the die block. The computing system The aim of the present study was to adopt a low-cost computing system to assist in the design of axisymmetric forging dies, including various associated calculations with regard to billet size, load and energy requirements, by: 6.

Nefissi, Bouazis & Zgahl: Prediction and Simulation of Axisymmetric Forging Load of Aluminium forging process, in the determination of the preforms' number and in the selection of an appropriate forging machine. In general, the upsetting process can be classified as a forgingFile Size: KB.

This paper is concerned with developing a new CAD system for the finisher die design of an axisymmetric forging with arbitrary profile. Precision forging is a field in which decision support systems can be effectively and widely applied and depends on knowledge and rules derived from the past experience of forging die design engineers.

Precise components are becoming quite important in. A forging where metal flow, during deformation, is predominately in a direction away from a common axis in a radial direction. Hoover St., Trenton, MI. Missing: computer system. The finisher die is then designed with allowances added for flash, draft, shrinkage, fillet and corner radii, and posi- tioning of the parting line.

When using multistage forging, the shapes of the preforms are selected, the blocker dies are designed, and the initial billet geometry is determined. Governing Equations for Plane Axisymmetric Problems The two-dimensional strain-displacement relations are given by Eqns.

and these simplify in the axisymmetric case to r u r u r u r u r r r rr 2 1 () Here, it will be assumed that the displacement u g: computer system. L I II 1. Kurt Lange., "Handbook of Metal forming", Mc-Graw Hill Book Company, New York, 2. Schey,J.A., "Introduction to Manufacturing. Chapter 9 – Axisymmetric Elements Learning Objectives • To review the basic concepts and theory of axisymmetric system because they can be used to simulate complex surfaces and are simple to work with.

CIVL 7/ Chapter 9 - Axisymmetric Elements 3/ Axisymmetric Elements. The programme has been developed for the purpose of interfacing to the Computer Aided Operation Sequence and Die Design System for Hot Upset Forgings, called UPSETDIE.

It accepts both solid and processed material as a starting material. Depending on the geometry to be machined, an automatic tool selection is made from a tool file. This chapter presents a general algorithm for process planning support for intermediate steps designs of axisymmetric hot close-die forging parts.

Example of using this algorithm also is illustrated. A CAD system has been developed for closed die forging and optimization. This system includes rules for geometrical design of the die and a finite element package for metal flow simulation, based on the rigid plastic formulation.

Using this system the initial shape of the die. A kinematically admissible velocity field for axisymmetric closed die forging is proposed.

The forging power and load are calculated and compared with experimental values. It is found that the theoretical predictions give estimates that are substantially higher than actual loads and g: computer system.

This work is devoted to the development of a CAD/CAM system for the closed-die forging process. The system development consists of three stages: namely, metal flow simulation, die failure analysis and design optimisation, and the development and implementation of a machining code.

In the first stage, the FEM was used to simulate the. International Journal of Mechanical Engineering and Technology (IJMET), ISSN – engineering technique for near net shape axisymmetric forging die design.

data presentation understood by the system of Computer. International Journal of Mechanical Engineering and Technology (IJMET. This modular method was then integrated by Biswas-Knight, with a computer aided design program and the package used for designing axisymmetric and elongated forgings and the associated dies.

ALTAN () Computer Simulation to Predict Load, Stress and Metal Flow in an Axisymmetric Closed-Die Forging, Metal Forming: Interelation between Theory and Practice ed.

by A.L. Hoffmanner, Plenum, New York. G.B. Yu, T.A. Dean, A Practical Computer- Aided Approach To Mould Design For Axisymmetric Forging Die Cavities, Int.

Mach. Tool Des. Res., No 1 pp2. Dierckx, J.P. Kruth, E. Sleeckx, A Computer- Aided Method For Design of Closed Die Forgings And Its Integration Into CAD/CAM Systems. WTCM/CRIFT. computer system. A key component of this is a fully automatic, optimized strain or axisymmetric parts with a simple 2 dimensional model.

A full function Information on material flow, die fill, forging load, die stress, grain flow, defect formation and ductile fracture (all products).The obtained analytical dependences are used as technological algorithms in computer-aided design systems for the technology of hot die forging.

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