Scholarlink

<p>Wear-related failure of conical picks in coal mining significantly affects cutting efficiency, making the optimization of working angles essential for performance improvement. In this study, the Discrete Element Method (DEM) is employed to systematically investigate the coupled effects of the elevation angle (40°–55°) and chamfer angle (10°–30°) on pick performance. An innovative parameter, termed the spin quantity (Δ), is introduced to quantitatively characterize the self-rotation behavior of conical picks. The results show that increasing the elevation angle or decreasing the chamfer angle effectively reduces the cutting force, with the minimum cutting force obtained at an elevation angle of 55° and a chamfer angle of 20°. The chamfer angle has a significant influence on self-rotation performance, and the maximum spin quantity (Δ) is observed at an elevation angle of 45° and a chamfer angle of 30°. In addition, wear decreases as the elevation angle increases, reaching a minimum at an elevation angle of 50° and a chamfer angle of 20°. These findings elucidate the coupling relationships among cutting force, self-rotation performance, and wear, and provide a theoretical basis for selecting optimal working angles for conical picks.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Analysis of the influence of conical pick angle on wear characteristics in coal miners

  • 期刊论文

  • 发表日期：

    2026年5月8日

查看全文
  • Jianfeng Guo,
  • Zhi Chen,
  • Xuecheng Wang,
  • Zhanjiang Ma,
  • Mengqi Zhang,
  • Junming Luo

摘要

Wear-related failure of conical picks in coal mining significantly affects cutting efficiency, making the optimization of working angles essential for performance improvement. In this study, the Discrete Element Method (DEM) is employed to systematically investigate the coupled effects of the elevation angle (40°–55°) and chamfer angle (10°–30°) on pick performance. An innovative parameter, termed the spin quantity (Δ), is introduced to quantitatively characterize the self-rotation behavior of conical picks. The results show that increasing the elevation angle or decreasing the chamfer angle effectively reduces the cutting force, with the minimum cutting force obtained at an elevation angle of 55° and a chamfer angle of 20°. The chamfer angle has a significant influence on self-rotation performance, and the maximum spin quantity (Δ) is observed at an elevation angle of 45° and a chamfer angle of 30°. In addition, wear decreases as the elevation angle increases, reaching a minimum at an elevation angle of 50° and a chamfer angle of 20°. These findings elucidate the coupling relationships among cutting force, self-rotation performance, and wear, and provide a theoretical basis for selecting optimal working angles for conical picks.