中文摘要：

基于环形件轧制理论以及轧制过程中金属体积不变规律,确定了高颈法兰封闭轧制毛坯的设计原则以及工艺参数的极限范围.通过有限元仿真模拟了高颈法兰封闭轧制成形过程,研究了工艺参数对轧制产品质量以及力能参数的影响规律,并确定了本文所研究高颈法兰的最优工艺参数.在D51--450型轧环机上采用自行设计的模具进行了轧制试验,并将试验结果与有限元模拟结果进行对比分析,验证了仿真结果的可靠性.

英文摘要：

Based on the ring rolling theory and the principle of invariable volume during the rolling process,the design principle of flange blanks and the limit scope of process parameters were determined for producing high neck flanges.The closed ring rolling process of the flange blanks was simulated by a finite element model（FEM）.According to the simulated results the optimal process parameters were obtained by analyzing the influences of process parameters on the product quality and the mechanical parameters.Closed ring rolling experiments of high neck flanges were carried out in a D51-450 ring rolling mill with a self-designed mould.The reliability of the finite element simulation was proved by comparing the simulated results with the experimental ones.