Precision of Cold Bulk Forming Carried out with Crank Presses in Dies with Rests and without Rests. Part 2. Back Extrusion and Stamping in Closed Die

摘要

The technique of the analysis is stated and the results of calculations of height sizes imprecision of pieces stamped with crank presses by traditional way and with application of rest~ are presented. In calculations, the initial dependencies obtained in the part 1 of this paper and necessary for analysis of factors influencing on height sizes imprecision of pieces stamped by back extrusion and in closed dies are used.