Abstract
Enclosed die forging of automobile parts such as cross pins and tripods necessitates two punches moving oppositely with the same velocity. Although multi-axial presses are constructed for this purpose, simple methods on ordinary cold forging presses are requested. To realize an equivalent motion for enclosed die forging on a press with a single driving axis, a die set using a pantograph links is invented. In this die set, the upper punch is driven with the press speed and the lower punch is kept still. The die is mounted on the middle plate fixed to the intermediate hinges of the pantograph, and as a result the relative velocities of the punches satisfy the requested relation. The die is usually divided horizontally for extracting the formed product from the die cavity. It is shown that vertical division of the die can eliminate the parting lines on the extruded rods with good circularity.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Lange, K., 1972, Handbook of Metal Forming, McGraw-Hill Book Company, 13.2–13.3.
Shinozaki, K., Yoshimura, H., Ando, H., 1999, Enclosed die forging, Its prosperous aspect as a precision forging process (in Japanese), 40(459), 316–321.
Japanese Patent, 1992, No. 1676368.
Japanese Patent, 2014, No. 330204
Ishihara, Y., 2011, Development of precision forging method with die structure controlling elastic deformation of die (in Japanese), Die and Mould Technology, 26 (5), 34–37.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2015 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Ishihara, Y., Osakada, K. (2015). Enclosed Die Forging Using Die Set. In: Tekkaya, A., Homberg, W., Brosius, A. (eds) 60 Excellent Inventions in Metal Forming. Springer Vieweg, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-46312-3_47
Download citation
DOI: https://doi.org/10.1007/978-3-662-46312-3_47
Published:
Publisher Name: Springer Vieweg, Berlin, Heidelberg
Print ISBN: 978-3-662-46311-6
Online ISBN: 978-3-662-46312-3
eBook Packages: EngineeringEngineering (R0)