盘形滚刀刀圈轧制数值模拟研究

盘形滚刀工况条件差、换刀成本高,生产厂家对刀圈的性能要求越来越严格。为了提高刀圈质量,针对TBM中43.2 cm(17英寸)盘形滚刀刀圈,采用轧制成形工艺,运用塑性成形软件,建立盘形滚刀轧制过程数值模型,通过有限元仿真分析滚刀成形的应力场和应变场,并对不同参数对成形过程的影响进行研究。研究结果表明:1)轧制过程应力较小,应变分布较为均匀,但整体应变较小,随着主辊转速及芯辊进给速度的增大,等效应力逐渐减小,应变基本不变。2)匹配仿真参数进行刀圈轧制试验,并对刀圈质量进行检测,刀圈流线与外形轮廓相符,分布连贯不被打断,且与主应力方向一致,流线合理。

Study of Numerical Simulation of Rolling of Disc Cutter Ring

Due to the poor working conditions and high cost of replacement of disc cutters, the manufacturers are getting stricter about the performance of the disc cutter rings. The numerical model of rolling process of TBM used 17 inch disc cutter is established by plastic forming software; the stress field and strain field of the disc cutter during rolling is analyzed by finite element simulation; and the influence of different parameters on disc cutter forming process is studied. The study results show that: 1) During the disc cutter rolling process, the stress and strain are small, the strain distribution is uniform; with the main roller speed and the feed speed of the core roller increase, the equivalent effective stress decreases; while the strain does not vary. 2) The test on disc cutter ring rolling by matching the simulation parameters is carried out; the quality checking shows that the cutter ring circle, with continuous distribution and holds the same direction with main stress, coincides with the cutter contour.