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<p>Pre-slotting is an effective method for improving the rock cutting performance of cutting head. This study combines numerical simulation and experimental tests to explore the impact of pre-slotting on the cutting performance. Cutting resistance force, cutting torque, cutting specific energy consumption and load variation coefficient are employed to evaluate the cutting performance. The rock cutting mechanism was analyzed, and the evaluating indexes under different pre-slotting depth, width and subsequent cutting distance were obtained. Results show that pre-slotting promotes stress concentration to extend along the pre-slotting direction, thereby reducing the effective stress peak value. Cutting resistance force, cutting torque, and cutting specific energy consumption can be effectively lowered by pre-slotting, while load variation coefficient is increased due to the empty cutting and uneven load. Additionally, the evaluating indexes are all tending to stable when the subsequent cutting distance exceeds the sum of cutting head diameter and pre-slotting width.</p>

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Cutting performance analysis of cutting head assisted with pre-slotting

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • Zhang Deyi,
  • Liang Hao,
  • Liu Songyong,
  • Zhang Jiaju

摘要

Pre-slotting is an effective method for improving the rock cutting performance of cutting head. This study combines numerical simulation and experimental tests to explore the impact of pre-slotting on the cutting performance. Cutting resistance force, cutting torque, cutting specific energy consumption and load variation coefficient are employed to evaluate the cutting performance. The rock cutting mechanism was analyzed, and the evaluating indexes under different pre-slotting depth, width and subsequent cutting distance were obtained. Results show that pre-slotting promotes stress concentration to extend along the pre-slotting direction, thereby reducing the effective stress peak value. Cutting resistance force, cutting torque, and cutting specific energy consumption can be effectively lowered by pre-slotting, while load variation coefficient is increased due to the empty cutting and uneven load. Additionally, the evaluating indexes are all tending to stable when the subsequent cutting distance exceeds the sum of cutting head diameter and pre-slotting width.