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<p>Understanding the force and wear performance of ripping cutters is important to improve the cutting efficiency and reduce the cutter wear in soft geotechnical strata. How to accurately evaluate the cutting efficiency and characterize the cutter wear remains a challenge. In this study, a newly designed ripping cutter called Yuanbao ripping cutter was used to investigate the cutting force characteristics and cutter wear evolution law based on a large-diameter rotational cutting platform. The effects of cutting radius, cutting depth, and rotational speed on the cutting force were analyzed. To accurately evaluate the cutting efficiency, a method for three-dimensional (3D) reconstruction and cutting volume calculation of a mortar disc based on linear laser measurement was proposed. The linear laser sensor and the angle encoder work together to determine the spatio-temporal characteristics of the mortar disc. The 3D reconstruction of the scanned data of the mortar disc is performed based on Python. The cutting volume is calculated based on Delaunay triangular mesh dissection and elevation interpolation. Moreover, the process of ripping cutter wear was quantitatively investigated. It was found that the normal and tangential forces did not vary with cutting radius; the side force decreased with increasing cutting radius. An optimum rotational speed of 1.2&#xa0;r/min was found to minimize the cutting force. The cutting force increased with increasing cutting depth. The cutting efficiency first increased and then decreased with increasing cutting depth and rotational speed, and was maximum at the cutting depth of 6&#xa0;mm and the rotational speed of 1.2 r/min. The height wear value and the edge wear length increased with the increase of cutting volume; the height wear and edge wear length showed a significant nonlinear exponential relationship. The failure process can be divided into two stages, the cutter wear is evaluated in terms of the edge wear length in the first stage of failure and is evaluated in terms of the height wear in the second stage of failure. The normal, tangential, and side forces exhibit a significant positive linear correlation with the height wear value. Thus, the cutter wear value can be calculated by measuring the cutting force. These advancements provide a more accurate foundation for cutting performance evaluation and tunneling parameters optimization in deep underground engineering.</p>

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Force and Wear Performance of Novel Ripping Cutter Based on Rotational Cutting Platform

  • 期刊论文

  • 发表日期：

    2026年4月28日

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  • Wentao Xu,
  • Long-Chuan Deng,
  • Yang Yang,
  • Chi Zhang,
  • Xiao-Zhao Li

摘要

Understanding the force and wear performance of ripping cutters is important to improve the cutting efficiency and reduce the cutter wear in soft geotechnical strata. How to accurately evaluate the cutting efficiency and characterize the cutter wear remains a challenge. In this study, a newly designed ripping cutter called Yuanbao ripping cutter was used to investigate the cutting force characteristics and cutter wear evolution law based on a large-diameter rotational cutting platform. The effects of cutting radius, cutting depth, and rotational speed on the cutting force were analyzed. To accurately evaluate the cutting efficiency, a method for three-dimensional (3D) reconstruction and cutting volume calculation of a mortar disc based on linear laser measurement was proposed. The linear laser sensor and the angle encoder work together to determine the spatio-temporal characteristics of the mortar disc. The 3D reconstruction of the scanned data of the mortar disc is performed based on Python. The cutting volume is calculated based on Delaunay triangular mesh dissection and elevation interpolation. Moreover, the process of ripping cutter wear was quantitatively investigated. It was found that the normal and tangential forces did not vary with cutting radius; the side force decreased with increasing cutting radius. An optimum rotational speed of 1.2 r/min was found to minimize the cutting force. The cutting force increased with increasing cutting depth. The cutting efficiency first increased and then decreased with increasing cutting depth and rotational speed, and was maximum at the cutting depth of 6 mm and the rotational speed of 1.2 r/min. The height wear value and the edge wear length increased with the increase of cutting volume; the height wear and edge wear length showed a significant nonlinear exponential relationship. The failure process can be divided into two stages, the cutter wear is evaluated in terms of the edge wear length in the first stage of failure and is evaluated in terms of the height wear in the second stage of failure. The normal, tangential, and side forces exhibit a significant positive linear correlation with the height wear value. Thus, the cutter wear value can be calculated by measuring the cutting force. These advancements provide a more accurate foundation for cutting performance evaluation and tunneling parameters optimization in deep underground engineering.