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<p>Due to the high temperature during the grinding process, the grinding surface quality is easily affected. The large spiral angle groove grinding wheel (LSG-GW) can improve the heat transfer performance of the grinding arc zone and then improve the surface quality, which is an effective way to break through the technical bottleneck of high temperature in traditional grinding processing. However, the unstable contact area between the LSG-GW and the workpiece makes the dissipation path of grinding heat complicated, resulting in the distribution of the grinding temperature field and the dynamic change mechanism difficult to study. Therefore, this paper aims to study the distribution of the transient grinding temperature field of the LSG-GW and reveal the dynamic change mechanism. The discrete points within the “contact zone” and “non-contact zone” of the grinding arc zone were calculated at various time points by discretizing along the circumference of the grinding wheel. The maximum undeformed chip thickness was determined based on the interaction between the grains and the workpiece within the grinding arc zone. The analysis further elucidated the number of the grains involved in the process, leading to the determination of the grinding force. A composite alternating moving heat load model (CAMHL model) was developed, considering the heat flux and the convective heat transfer coefficient within the grinding arc zone. A finite element analysis model was constructed to investigate the transient grinding temperature field for the LSG-GW, incorporating the CAMHL model. The study revealed that the maximum grinding temperature with the LSG-GW is approximately 24.5% lower than that with conventional grinding wheels. Additionally, the surface temperature when grinding workpiece with conventional grinding wheels is greatly affected by the depth of grinding. Increasing the spiral angle, the number of spiral lines, and the groove width were found to decrease the grinding temperature of the LSG-GW. An experimental platform was established to examine the changes in the grinding temperature field of 718H steel, utilizing thermocouples embedded in the workpiece and an oscilloscope for temperature measurement. The experimental results corroborated the validity of the theoretical model, demonstrating the mutual validation between theoretical predictions and experimental data.</p>

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A novel model of composite alternating moving thermal loads and transient temperature for a large spiral angle grooved grinding wheel

  • 期刊论文

  • 发表日期：

    2025年2月19日

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  • Yanpeng Song,
  • Jingliang Jiang,
  • Wei Li,
  • Shufeng Sun,
  • Dexiang Wang

摘要

Due to the high temperature during the grinding process, the grinding surface quality is easily affected. The large spiral angle groove grinding wheel (LSG-GW) can improve the heat transfer performance of the grinding arc zone and then improve the surface quality, which is an effective way to break through the technical bottleneck of high temperature in traditional grinding processing. However, the unstable contact area between the LSG-GW and the workpiece makes the dissipation path of grinding heat complicated, resulting in the distribution of the grinding temperature field and the dynamic change mechanism difficult to study. Therefore, this paper aims to study the distribution of the transient grinding temperature field of the LSG-GW and reveal the dynamic change mechanism. The discrete points within the “contact zone” and “non-contact zone” of the grinding arc zone were calculated at various time points by discretizing along the circumference of the grinding wheel. The maximum undeformed chip thickness was determined based on the interaction between the grains and the workpiece within the grinding arc zone. The analysis further elucidated the number of the grains involved in the process, leading to the determination of the grinding force. A composite alternating moving heat load model (CAMHL model) was developed, considering the heat flux and the convective heat transfer coefficient within the grinding arc zone. A finite element analysis model was constructed to investigate the transient grinding temperature field for the LSG-GW, incorporating the CAMHL model. The study revealed that the maximum grinding temperature with the LSG-GW is approximately 24.5% lower than that with conventional grinding wheels. Additionally, the surface temperature when grinding workpiece with conventional grinding wheels is greatly affected by the depth of grinding. Increasing the spiral angle, the number of spiral lines, and the groove width were found to decrease the grinding temperature of the LSG-GW. An experimental platform was established to examine the changes in the grinding temperature field of 718H steel, utilizing thermocouples embedded in the workpiece and an oscilloscope for temperature measurement. The experimental results corroborated the validity of the theoretical model, demonstrating the mutual validation between theoretical predictions and experimental data.