Improvement in the reliability of shells for light water reactors by manufacture from hollow ingots

Modeling and improvement of saddling a stepped hollow workpiece with a profiled tool

“…Technical application of the established results is the development of a new technological process for forging rings with flanges. Earlier studies [14][15][16][17][18][19][20][21][22][23][24][25][26][27] have examined the technological processes of forging cone-like rings. The current work reveals patterns in the production by forging of conical and cylindrical rings with flanges.…”

“…The established technological parameters were feed and reduction at deformation. Study [25] applied a FEM to compare broaching techniques when using the flat and combined dies. It was established that when using the combined dies, deformations are more concentrated in the central zone of a forging, by 15 %.…”

“…Analysis of scientific publications [14][15][16][17][18][19][20][21][22][23][24][25][26][27] has revealed that the task on increasing the utilization factor of a material during machining and on improving the mechanical characteristics of a material in the manufacture of stepped rings has not been fully resolved up to now. The steps of rings are as-signed with a significant technological margin for machining.…”