盘形滚刀刀圈轧制数值模拟研究

Study of Numerical Simulation of Rolling of Disc Cutter Ring

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。

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 disccutter 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.