关键词: 大型管件, 过弯矫圆, 刚端影响, 控制策略

Abstract:

Over-bending setting round for pipe end is one of the most important processes to make the large pipes standard. The study of rigidity influence in the forming process and the logical control policy are the base to formulate the proper technological parameter. Through the physical test, this paper contrasted the mould press type bending process of long pipe billet end and the mould press type bending process short pipe billet, and established the relationship between the pipe ovality and the deformation, thereby a control policy of mould press type over-bending setting round for large pipe end was built.The experimental results suggest that the control policy can control the residual ovality of pipe-end within 0.5%.

Key words: large pipe, over-bending setting round, rigidity influence, control policy