大型管件管端过弯矫圆三步法控制策略

摘要

By physical test, this paper firstly gives the equivalence relation to indicate that the setting round process and the radial compress process of the circular section pipe-end are equivalent. And then, “three-step” control policy of over-bending setting round for pipe-end is built. This lays a foundation for the theoretical study and intelligent control of over-bending setting round technology. The experimental results suggest that the control policy can control the residual ovality of pipe within 0.5%.%管端过弯矫圆工艺是保证大型管件产品质量的重要工序之一．管端矫圆是一个局部弹塑性变形过程，采用传统的弹塑性理论对其变形本质的精确解析存在一定困难，而合理的矫圆控制策略是提高生产效率的有效手段．本文首先采用物理实验的方法验证了管端矫圆与压扁之间的等价关系，进而通过分析管端压扁过程的弹复规律建立了“三步法”控制策略，从而为后续的过弯矫圆智能化控制系统的奠定了基础．最终的验证实验表明，该控制策略可有效地将管件的管端椭圆度控制在0．5％以下．