Advertisement

Computer-Aided Design of Axisymmetric Hot Forging Dies

  • S. K. Biswas
  • W. A. Knight
Chapter

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 BS 4114, are automatically determined.

The system utilizes standard die sets, with interchangeable inserts, the profile of which is added to the forging impression, and an assembly drawing of the die set is plotted out. Other outputs are drawings of the forging, detail drawings of the variable die components, and a co-ordinate listing to facilitate manual NC programming for manufacture of the die parts. A further programme can be utilized to design appropriate preforms for components if sufficient quantities are required to make this economically justifiable.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    C. C. Gallagher and W. A. Knight. Group Technology. Butterworth, 1973.Google Scholar
  2. 2.
    W. A. Knight. Group technology in forging and stamping. Metallurgia and Metal Forming (1971) 38, 245.Google Scholar
  3. 3.
    W. A. Knight. Part family methods for bulk metal forming. Proc. 2nd Int. Prod. Res. Conf. Copenhagen, (1973).Google Scholar
  4. 4.
    B. Stejskal. Aplikace Skupinove Technologie pri Kovani, Bratislava, 1966.Google Scholar
  5. 5.
    P. V. Kamnev. Gruppovoi Metod Proizvodstvo Pokovok, Lenizdat, 1961.Google Scholar
  6. 6.
    L. T. Chan, S. A. Tobias and F. Bakhtar. Design and performance characteristics of Petro-Forge mk I and mk II machines. Proc. I. Mech. Engnrs. (1969) 184, 1097.Google Scholar
  7. 7.
    T. Altan and H. J. Henning. Closed die forging of round shapes-flash design and material savings. Metallurgia and Metal Forming (1972) 39, 83.Google Scholar
  8. 8.
    J. A. Schey. Principles of forging design. Metal Treatment (1966) 33, 263.Google Scholar
  9. 9.
    A. M. Sabroff, F. H. Bougler and H. J. Henning. Forging Materials and Practice. Reinholt Book Corp (1966).Google Scholar
  10. 10.
    DIN 7523. Gestaltung von Gesenkschmiedestücken (1972) 1-3.Google Scholar
  11. 11.
    British Standards Institution. Tolerances for steel drop and press forgings and steel upset forgings made on horizontal forging machines BS 4114, (1967).Google Scholar
  12. 12.
    K. Vierregge. Die gestaltung der Gratspaltsan schmiedegesent. Industrie-Anzeiger (1970) 76, 65, 1561.Google Scholar
  13. 13.
    G. P. Teterin et al. Shape difficulty criteria for forgings (Russian). Kuznecno-Stampovocnoe Proizvodstvo (1966) 7, 6.Google Scholar
  14. 14.
    Ministry of Technology. A study of the U.K. Die and Mould Manufacturing Industry, 1970.Google Scholar
  15. 15.
    F. Bakhtar. Economics of high energy rate forging. Engineer (1969) 227, 302.Google Scholar
  16. 16.
    National Association of Drop Forgers and Stampers. Recommendations for Uniform Cost Estimating, 1953.Google Scholar
  17. 17.
    E. P. Unskov. An Engineering Theory of Plasticity. Butterworths, 1961.Google Scholar
  18. 18.
    T. Altan, H. J. Henning and R. J. Florentino. The use of analytical methods to predict loads and stresses in closed die forging. Final Report of ‘A Study of Mechanics of Closed Die Forging’. Battelle Memorial Institute, 1969.Google Scholar
  19. 19.
    S. Kobayashi, V. McDonald and E. G. Thomsen. Some aspects of closed die forging. Int. J. Mech. Sci. (1960) 1, 282.CrossRefGoogle Scholar
  20. 20.
    S. K. Samanta. The dynamic compression of steels at elevated temperatures. Proc. 11th MTDR Conf. 1970.Google Scholar
  21. 21.
    S. K. Biswas and B. W. Rooks. Application of a computer simulation technique to estimate load and energy in forging. Proc. 13th MTDR. Conf. 1972.Google Scholar
  22. 22.
    K. Von Spies. Intermediate forms in drop forging and their production by roll forming. West Deutscher Verlag, Cologne (Translated by Ministry of Technology, 1969), 1959.Google Scholar
  23. 23.
    A. Chamouard. Estampage et Forge. Dunod (Paris), 1964.Google Scholar
  24. 24.
    N. Akgerman, J. R. Becker and T. Altan. Preform design in closed die forging. Metal-lurgia and Metal Forming (1973) 40, 135.Google Scholar

Copyright information

© Macmillan Publishers Limited 1975

Authors and Affiliations

  • S. K. Biswas
    • 1
  • W. A. Knight
    • 1
  1. 1.Department of Mechanical EngineeringUniversity of BirminghamUK

Personalised recommendations