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Application of load pulsation using servo press to plate forging of stainless steel parts

Author:
Maeno, T.   Mori, K.   Hori, A.  


Journal:
Journal of Materials Processing Technology


Issue Date:
2014


Abstract(summary):

Load pulsation using a servo press was applied to a forging process of a stainless steel sheet having high flow stress and adhesive bond. The effect of the load pulsation on the deformation behaviour of a stepped stainless steel part was examined. The cavity and rollover formed on the upper surface and on the bottom boss surface, respectively, are also decreased by the load pulsation. In the load pulsation, gaps for feeding a liquid lubricant are formed around edges and corner of the deforming plate by a difference in elastic recovery between the die and plate in each release of load, and thus these regions are automatically re-lubricated. The re-lubrication function was improved by immersing the plate in the lubricant during forging. The re-lubrication function for low-cost tool steel was higher than that high-cost tungsten carbide because of smaller Young's modulus. (c) 2014 Elsevier B.V. All rights reserved.


Page:
1379-1387


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