20th International Forgemasters Meeting - IFM 2017

Operation of four-die forging devices (FDFD) under various operational conditions and on various hydraulic presses, which differ in their design concepts and degree of automation, showed that in every application case an individual approach should be used to select optimized design concept and forging technology depending upon actual production objectives. With a view of above, introduced in this paper are various design concepts of FDFD and various forging technologies applicable for these devices. The main selection criteria both for the design concept and for the forging technology are: high production output which must be significantly higher than that of the replaced production process, higher metal quality and forged parts quality (in terms of dimensional accuracy and surface quality), shortened production cycle due to a shorter forging cycle, reduced reheating requirements and shortened non-production time, and also higher good metal yield. Presented in this paper are the ways of meeting these criteria for solution of various technological tasks and also some specific modifications of existing technology and existing press design which may occasionally appear to be necessary in order to gain maximum value from utilization of a FDFD.