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<p>Difficult-to-cut materials generate substantial heat in the grinding arc zone during high-speed grinding, leading to potential workpiece burn and accelerated grinding wheel wear. Conventional grinding cooling-method limitations restrict further enhancements in grinding efficiency, and the extensive use of coolant does not align with the contemporary direction towards green manufacturing. This paper, utilizing additive manufacturing technology, designs and fabricates an efficient heat-transferring rotary heat pipe grinding wheel with a complex internal cavity structure. The interior is designed with a forward conical wall and an inverted conical wall structure. These structures effectively utilize centrifugal and wall reaction forces to allow for orderly and controlled circulation of the internal gas-liquid medium. Comparative experiments were conducted to study the heat transfer performance of the heat pipe grinding wheel. Compared to conventional grinding wheels, heat pipe grinding wheels effectively reduce temperatures by approximately 73.86% when no cold air is used and 85.07% when cold air is used. Subsequent grinding tests on superalloy GH4169 workpieces analyzed residual stresses, microscopic morphology, and temperatures in the grinding arc zone to validate the superior cooling effects of the heat pipe grinding wheel relative to conventional grinding wheels, enabling avoidance of workpiece surface burn during dry grinding. This demonstrates that integrated design and additive manufacturing technologies hold broad prospects for application in efficient heat transfer in grinding.</p>

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Investigation on the design and heat transfer performance of dry-grinding heat pipes grinding wheels

  • 期刊论文

  • 发表日期：

    2025年1月24日

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  • Yongjie He,
  • Jun Yao,
  • Xiaofeng Zhang,
  • Dazhong Yuan,
  • Xinhao Zhang,
  • Kailun Li,
  • Dianzheng Wang,
  • Baorui Du

摘要

Difficult-to-cut materials generate substantial heat in the grinding arc zone during high-speed grinding, leading to potential workpiece burn and accelerated grinding wheel wear. Conventional grinding cooling-method limitations restrict further enhancements in grinding efficiency, and the extensive use of coolant does not align with the contemporary direction towards green manufacturing. This paper, utilizing additive manufacturing technology, designs and fabricates an efficient heat-transferring rotary heat pipe grinding wheel with a complex internal cavity structure. The interior is designed with a forward conical wall and an inverted conical wall structure. These structures effectively utilize centrifugal and wall reaction forces to allow for orderly and controlled circulation of the internal gas-liquid medium. Comparative experiments were conducted to study the heat transfer performance of the heat pipe grinding wheel. Compared to conventional grinding wheels, heat pipe grinding wheels effectively reduce temperatures by approximately 73.86% when no cold air is used and 85.07% when cold air is used. Subsequent grinding tests on superalloy GH4169 workpieces analyzed residual stresses, microscopic morphology, and temperatures in the grinding arc zone to validate the superior cooling effects of the heat pipe grinding wheel relative to conventional grinding wheels, enabling avoidance of workpiece surface burn during dry grinding. This demonstrates that integrated design and additive manufacturing technologies hold broad prospects for application in efficient heat transfer in grinding.