Development of a technological process for hot volume stamping of forgings using digital modeling

A new technological process for manufacturing forgings with deep cavities using the hot stamping method is proposed, which makes it possible to reduce heating and specific forces on the tool and increase its durability. The developed technology includes the operations of upsetting the initial blank, hot stamping the outer profile of the resulting forging, extruding the inner cavity of the mandrel and open stamping the rear conical section of the mandrel. To increase the tool life after hot stamping of the outer profile, it is proposed to pre-extrude the inner cavity of the mandrel with increased dimensions, and then perform the final formation of the inner cavity and the rear conical section of the mandrel. To select the parameters of the developed process, a study of technological transitions was conducted using the digital modeling method in the QForm program. The parameters of blank shaping, stress-strain state and technological forces of stamping transitions are determined.