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A New System to Evaluate Comprehensive Performance of Hard-Rock Tunnel Boring Machine Cutterheads

Chinese Journal of Mechanical Engineering 2019年第6期32卷 72-84页

作者： Ye Zhu Wei Sun Junzhou Huo Zhichao Meng School of Mechanical and Engineering Dalian Jiaotong UniversityDalin 116000China School of Mechanical and Engineering Dalian University of TechnologyDalian 116000China

The accurate performance evaluation of a cutterhead is essential to improving cutterhead structure design and predicting project cost. Through extensive research, this paper evaluates the performance of a tunnel boring machine(TBM) cutterhead for cutting ability and slagging ability. This paper propose cutting efficiency, stability, and continuity of slagging as the evaluation indexes of comprehensive cutterhead performance. On the basis of research of true TBM engineering applications, this paper proposes a calculation method for each index. A slagging efficiency index with a ratio of the maximum di erence between the slagging amount and average slagging is established. And a slagging stability index with a ratio of the maximum slagging fluctuation and average slagging is presented. Meanwhile, a cutting efficiency index by the weighed average value of multistage rock fragmentation of a cutter’s specific energy is established. The Robbins and China Railway Construction Corporation(CRCC) cutterheads are evaluated. The results show that under the same thrust and torque, the slagging stability of the CRCC scheme is worse, but the slagging continuity of the CRCC scheme is better. The cutting ability index shows that the CRCC cutterhead is more efficient.

关键词： Evaluation of cutterhead cutting ability Slagging ability Rock fragmentation load

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An Experimental Study of cutting Performance of Ti(C, N) Based Cermet cutting Tool

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Journal of Beijing Institute of Technology 1995年第2期4卷 173+168-173页

作者：庞思勤于启勋北京理工大学机械工程系

Through systematic cutting experiments, characteristics of the cutting performance of Ti(C, N) based cermets is identified. The experiments were designed to study their resistance,toughness, cutting force, tool-chip friction coefficient and machining quality by comparing them with those of WC based cemented carbides. The cutting data and the regressed empirical formulae would be useful to promote proper application of cermet cutting tool materials.

关键词： metal ceramics metal cutting cutting ability cutting tests

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