Sequenced rotation with ordinary V-shaped anvil is used in the upper flat and lower V-shaped anvils mandrel drawing process of 20Mn5 super-heavy hollow steel ingot, but the forging deforms unevenly and contains intensive porosities. By numerical simulation using DEFORM-3D and theoretical derivation, the relationship between divergence angle, theoretical rotation angle, V-shaped anvil angle and reduction rate is given quantificationally, and the new rotation processes with ordinary V-shaped anvil at different reduction rates are proposed. Numerical simulation and physical experiment results show that the deformation uniformity and compaction effect of big fillet V-shaped anvil and convex V-shaped anvil is better than that of ordinary V-shaped anvil for single press. Simulation results of rotatory drawing show the deformation uniformity and compaction effect of new rotation processes with convex V-shaped anvil, big fillet V-shaped anvil and ordinary V-shaped anvil is better than that of sequenced rotation with ordinary V-shaped anvil at different reduction rates, while the deformation uniformity of the new rotation process with big fillet V-shaped anvil is best and the compaction effect of the new rotation process with convex V-shaped anvil is best. The results can provide important theoretical reference for establishment of hollow steel ingot forging process specification of national heavy cylinder forgings.
LIU Min
,
MA Qingxian
,
LIU Gongmei
. Research on Rotatory Deformation Uniformity and Compaction Effect of Super-heavy Hollow Steel Ingot[J]. Journal of Mechanical Engineering, 2016
, 52(8)
: 90
-96
.
DOI: 10.3901/JME.2016.08.090
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