Study on Excavation and Wear Characteristics of Disc Cutter for Extended Tunnel Boring Machine

加长隧道掘进机圆盘滚刀开挖及磨损特性研究

• 批准号: 11650510
• 负责人: MURO Tatsuro
• 金额: $ 2.24万
• 依托单位: Ehime University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650510/
• 关键词: T.B.M.; Cutter Bit; Skew Angle; Specific Energy; Rock; Amount of Work; Excavation Efficiency; Amount of Wear; T.B.M.; 掘削; モルタル; 回転仕事量

The aim of the research is to experimentally improve that the effectiveness of the edge excavation of the extended T.B.M cutter bit is much more higher than that of the conventional plane excavation. The excavation experiment was carried out using disc cutter bit cutting the edge part of the mortar, Oya stone, andesite and granite rock specimens of two degrees of freedom having diameter of 32 cm and thickness of 15 cm with the cutting depth per round of 0.2〜1.0 cm, and cutting space of 0.5〜5.0 cm. Three types of model disc cutter bit made of S45C metal with the tip angle α of π/6, π/4 and π/3 rad were used at the excavation tests. The diameter and thickness of the model disc cutter bit were 15.0 cm and 1.5 cm respectively. The power of rotation and power of thrust were calculated based on the measured values of normal, tangential and lateral force acting to the cutter bit. Then, the specific cutting energy was calculated as the ratio of the excavation power, i.e. the sum of power of rotation and power of thrust, to the amount of excavation per second. The result shows that specific cutting energy increases, with excavation depth per round while it decreases hyperbolically with the increment of cutting space. However, it was also observed that the tip angle exerts insignificant affect on the specific cutting energy. Moreover, it was found that the optimum excavation, i.e. minimum specific cutting energy, could be achieved at the ratio of cutting space and cutting depth per round of 5.0. Finally, it was observed that the excavation efficiency of the edge excavation can be 10〜50 times higher while its amount of wear can be much smaller compared with the plane excavation method.

本研究的目的是通过实验提高加长T.B.M刀头的边缘开挖效率，使其远高于常规平面开挖的效率。二自由度砂浆、大谷石、安山岩、花岗岩岩石标本，直径为32厘米，厚度为15厘米，每轮切割深度为0.2〜1.0厘米，开挖试验中使用了三种型号的S45C金属圆盘刀头，刀尖角α分别为π/6、π/4和π/3 rad。模型圆盘刀头分别为15.0 cm和1.5 cm，根据作用于刀头的法向力、切向力和侧向力的测量值计算旋转功率和推力功率。然后，将比切削能量计算为挖掘功率（即旋转功率和推力功率之和）与每秒挖掘量的比值。结果表明，比切削能量随着每轮挖掘深度的增加而增加。然而，还观察到尖端角度对比切削能的影响不显着，而且发现最佳挖掘，即最小比切削能。每轮切削空间与切削深度之比为 5.0 时，边缘挖掘的挖掘效率可比平面挖掘高 10 至 50 倍，而磨损量则要小得多。方法。

项目成果

MURO Tatsuro: "Story of Tools Wear against Soil and Sandy Materials----Parts of Construction Machinery----"Committee of Countermeasure of Wear against soil, and sandy materials, The Japanese Society for Terramechanics. 1-463 (2000)

MURO Tatsuro：“工具对土壤和沙质材料的磨损故事----建筑机械零件----”日本土地力学学会土壤和沙质材料磨损对策委员会。

土砂摩耗対策委員会: "土砂摩耗の話-建設機械作業部品-"テラメカニックス研究会. 463 (2000)

土沙磨损对策委员会：“土沙磨损的故事 - 工程机械工作部件 -” Terra Mechanics 研究小组 463 (2000)。

室達朗: "T.B.M.センターカッタの定常掘削特性に及ぼすビット斜角の影響"土木学会論文集. 652/III-51. 47-60 (2000)

Tatsuro Muro：“钻头斜角对 T.B.M. 中心铣刀稳定挖掘特性的影响”，日本土木工程师学会学报 652/III-51 (2000)。

Tatsuro Muro: "Steady state edge excavation property of a disc cutter bit"Proceedings of the 6th Asia・Pacific Conf. of the Int. Soc. for Terrain-Vehicle Sys.. 1. 49-58 (2001)

Tatsuro Muro：“圆盘铣刀钻头的稳态边缘挖掘特性”国际地形车辆系统学会第六届亚太会议论文集。 1. 49-58 (2001)

土砂摩耗対策委員会: "土砂摩耗の話-建設機械作業部品-"テラメカニックス研究会. 463 (2000)

土沙磨损对策委员会：“土沙磨损的故事 - 工程机械工作部件 -” Terra Mechanics 研究小组 463 (2000)。