«上一篇
 文章快速检索 高级检索

 哈尔滨工程大学学报  2019, Vol. 40 Issue (2): 374-379  DOI: 10.11990/jheu.201708010 0

### 引用本文

XIA Yimin, ZHANG Xiaoyun, ZENG Guiying, et al. Rolling characteristics and changing laws of TBM cutter ring[J]. Journal of Harbin Engineering University, 2019, 40(2), 374-379. DOI: 10.11990/jheu.201708010.

### 文章历史

TBM滚刀刀圈轧制成形特性及其变化规律

Rolling characteristics and changing laws of TBM cutter ring
XIA Yimin , ZHANG Xiaoyun , ZENG Guiying , FU Jie , ZHOU Ming
College of Mechanical and electrical Engineering, Central South University, Changsha 410083, China
Abstract: A finite element model of the disc cutter ring in rolling forming is established to analyze the deformation characteristics and improve the comprehensive performance of this cutter ring in the rolling process. This model enables us to examine the evolution law of the effective stress field and effective strain field, as well as the streamline distribution characteristics of the cutter ring in the rolling process. The effects of the initial temperature of the cutter ring, main roller friction factor, and roller speed on the quality of the shaped product are also studied. A rolling test of the cutter ring in D53K-800 vertical rolling ring machine is conducted and the metal streamline of the cutter ring after rolling is analyzed. After rolling, the metal streamlines of the cutter ring become smooth and closed along its cross section. Results indicate that the effective strain of the cutter ring changes minimally (to a value of approximately 1.93) with temperature when the friction factor of the main roller is extremely large or extremely small, and the average value and standard deviation of the effective strain and stress of the cutter ring increases. When the main roller speed is 2.632 rad/s, the standard deviation of effective stress reaches the maximum.
Keywords: full-face rock tunnel boring machine (TBM)    disc cutter ring    roll forming    numerical simulation    experimental investigation    metal streamlines    finite element model

1 盘形滚刀刀圈轧制成形有限元模拟 1.1 刀圈轧制成形有限元模型建立

 Download: 图 1 刀圈毛坯和锻件尺寸 Fig. 1 size of cutter ring blank and forging
 Download: 图 2 刀圈轧制有限元模型 Fig. 2 Finite element model of cutter ring rolling

1.2 刀圈轧制成形有限元模拟结果 1.2.1 刀圈轧制成形过程等效应变分析

 Download: 图 3 刀圈轧制模拟应变结果 Fig. 3 Simulation results of strain of the cutter ring rolling
1.2.2 刀圈轧制成形过程等效应力分析

 Download: 图 4 刀圈轧制模拟应力结果 Fig. 4 Simulation results of stress of the cutter ring rolling
1.2.3 刀圈轧制成形金属流线分析

 Download: 图 5 刀圈流线分布 Fig. 5 Metal streamline distribution of cutter ring
2 工艺参数对刀圈成形质量的影响 2.1 评定指标

 ${\rm{SDP}} = \sqrt {\frac{1}{N}\sum\limits_{i = 1}^N {({\rm{PEE}}{{\rm{Q}}_i} - {\rm{PEE}}{{\rm{Q}}_a})} }$ (1)
 ${\rm{SDS}} = \sqrt {\frac{1}{N}\sum\limits_{i = 1}^N {({\rm{SEQ}}{{\rm{V}}_i} - {\rm{SEQ}}{{\rm{V}}_a})} }$ (2)
 ${\rm{PEE}}{{\rm{Q}}_a} = \frac{1}{N}\sum\limits_{i = 1}^N {{\rm{PEE}}{{\rm{Q}}_i}}$ (3)
 ${\rm{SEQ}}{{\rm{V}}_a} = \frac{1}{N}\sum\limits_{i = 1}^N {{\rm{SEQ}}{{\rm{V}}_i}}$ (4)

2.2 初始轧制温度对刀圈成形件质量影响规律

H13钢标准锻造温度范围在869 ℃~1 156 ℃。考虑到毛坯与模具之间的传热影响，仿真取值时适当提高温度范围，故选择刀圈始锻温度分别为1 050 ℃、1 100 ℃、1 150 ℃和1 200 ℃进行刀圈轧制仿真。图 6为初始轧制温度对刀圈轧制成形刀圈质量的影响规律，由图 6可知，刀圈成形件等效应变平均值在初始轧制温度为1 100 ℃时较大，随着初始轧制温度升高，等效应变平均值降低；等效应变的标准差随初始轧制温度变化不大，其值在1.93左右。刀圈成形件等效应力的平均值和标准差随初始轧制温度的升高而降低，即在轧制温度范围内，初始轧制温度越高，刀圈等效应力分布越均匀。轧制温度对成形力和金属充型能力有很大影响，随着轧制温度的升高，金属材料塑性增加，变形抗力降低，高温使材料的塑性越来越好，材料变形也越均匀。轧制温度过低时，金属流动能力差，易导致成形力大和靠模后金属填充不足等缺陷。

 Download: 图 6 初始轧制温度对刀圈成形质量的影响 Fig. 6 The influence of the initial rolling temperature on the forming quality
2.3 主辊摩擦因子对刀圈成形件质量影响规律

 Download: 图 7 主辊摩擦因子对刀圈成形质量的影响 Fig. 7 The influence of the main roller friction factor on the forming quality
2.4 主辊转速对刀圈成形件质量影响规律

 Download: 图 8 主辊转速对刀圈成形质量的影响 Fig. 8 The influence of the main roll rotationalspeed on the forming quality
3 试验研究

 Download: 图 10 刀圈试样取样位置 Fig. 10 Sampling position of cutter ring specimen
 Download: 图 11 刀圈受力和流线分布 Fig. 11 Stress and streamline shape of cutter ring
4 结论

1) 轧制成形过程中，刀圈截面应变大小分布在0~1.22，变化平稳，能获得良好组织性能。随着轧制进行，刀圈应力先迅速上升，此后稳定在175 MPa左右。轧制结束后，刀圈截面应力大部分在100~160 MPa。轧制后刀圈金属流线光滑，沿刀圈截面几何形状分布均匀。