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<p>End mill relief plays a crucial role in reducing friction, mitigating tool wear, and enhancing surface finish quality. Among various relief types, eccentric relief forms stronger cutting edge, offers greater cutting tooth strength, and promotes smoother chip evacuation. However, the grinding process of eccentric relief is prone to undercut and overcut defects when the grinding wheel’s position or size is not appropriately selected. To address this issue, this paper proposes a novel method for determining the wheel position in eccentric relief grinding of cylindrical end mills, effectively avoiding undercut and overcut. A new analytical expression for wheel position is derived based on conjugate surface theory. Methods for detecting undercut and interference are introduced using circular arc projection. Simulation results demonstrate that the proposed method accurately identifies these two defects and enables the precise generation of eccentric relief with a desired tangent angle or desired segment angle and radial drop, free from undercut and interference.&#xa0;</p>

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Wheel position determination for eccentric relief grinding of cylindrical end mills avoiding undercut and interference

  • 期刊论文

  • 发表日期：

    2025年6月3日

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  • Lei Ren,
  • Zheng Zhang,
  • Jiaxiang Han,
  • Chong Lv,
  • Junjin Ma,
  • Xiaobin Cui

摘要

End mill relief plays a crucial role in reducing friction, mitigating tool wear, and enhancing surface finish quality. Among various relief types, eccentric relief forms stronger cutting edge, offers greater cutting tooth strength, and promotes smoother chip evacuation. However, the grinding process of eccentric relief is prone to undercut and overcut defects when the grinding wheel’s position or size is not appropriately selected. To address this issue, this paper proposes a novel method for determining the wheel position in eccentric relief grinding of cylindrical end mills, effectively avoiding undercut and overcut. A new analytical expression for wheel position is derived based on conjugate surface theory. Methods for detecting undercut and interference are introduced using circular arc projection. Simulation results demonstrate that the proposed method accurately identifies these two defects and enables the precise generation of eccentric relief with a desired tangent angle or desired segment angle and radial drop, free from undercut and interference.