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随着我国能源装备工程建设的加速推进,对大型石油天然气管道接头、双边法兰和高压阀体环件的需求增多,复合轧环工艺是成形此类环件的新技术。针对当前油气输送管道用法兰环成形精度低、环件尺寸公差大的现状,研究了环件几何尺寸公差与毛坯允许质量误差之间的关系,提出了此类环件复合轧制过程尺寸精度控制方法,建立了相应的轧辊位置修正数学模型,并选用两组不同质量的毛坯进行复合轧环实验来验证该几何尺寸精度控制方法。结果表明,实验得到的成形环件尺寸与数学模型计算的理论值接近,研究结论对于优质油气输送管道法兰环的精密轧制生产具有实际指导意义。
With the accelerated construction of energy equipment projects in our country, there is an increasing demand for large oil and gas pipeline joints, bilateral flanges and high-pressure valve body rings. The composite ring rolling process is a new technology for forming such rings. In view of the fact that the forming precision of the flange ring for oil and gas pipelines is low and the dimension tolerance of the ring pieces is large, the relationship between the geometric tolerance of the ring pieces and the allowable mass error of the blank is studied, and the dimensional accuracy control Method, a mathematical model of roll position correction was established, and two groups of blank with different qualities were selected to test the control method of the precision of the geometrical dimension. The results show that the size of the formed ring measured by the experiment is close to the theoretical value calculated by the mathematical model. The conclusion of the study is of practical significance for the precision rolling production of the flange ring of high quality oil and gas pipelines.