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<p>Jet polishing technology suffers from a low material removal rate in ultra-precision machining. Dynamically regulating the jet pressure during polishing can not only improve machining efficiency but also optimize the dwell time distribution, which is of great significance for enhancing machining accuracy and process stability. To achieve these objectives, the effects of jet pressure on particle velocity, impact angle, and impact position were first investigated through theoretical analysis and computational fluid dynamics (CFD) simulations. Subsequently, fixed-point jet polishing experiments were conducted under different jet pressures. The experimental results showed that the material removal distributions under different jet pressures were essentially consistent, while the material removal depth exhibited a power-law increase with jet pressure. On this basis, an amplitude-scaling modeling method based on profile shape consistency was proposed to establish a predictive model of the dynamic-jet-pressure tool influence function (DJP-TIF), which was further used to calculate the variation in maximum removal depth under dynamic jet pressure. Finally, material removal experiments were performed under different pressure change rates. The experiments revealed that, at the same instantaneous pressure, the material removal distributions obtained during pressure increase and pressure decrease were essentially identical and were only minimally affected by the pressure change rate. These results indicate that the instantaneous material removal distribution is governed primarily by the current jet pressure level, with no significant dependence on whether the pressure is increasing or decreasing, or on the pressure change rate. Meanwhile, the experimentally measured maximum removal depths under dynamic jet pressure were in good agreement with the predictions obtained from the DJP-TIF model based on the pressure scaling factor, thereby validating the effectiveness of the model under dynamic jet-pressure conditions. This study further enhances the machining capability of jet polishing and provides a new solution for the high-efficiency and high-precision machining of key components such as ultra-precision optical elements and molds.</p>

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Modeling and experimental validation of the material removal function under dynamic jet pressure in fluid jet polishing

  • 期刊论文

  • 发表日期：

    2026年7月3日

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  • Zongfu Guo,
  • Bin Gao,
  • Mengxiao Du,
  • Xingyu Yu,
  • Libing Zhang

摘要

Jet polishing technology suffers from a low material removal rate in ultra-precision machining. Dynamically regulating the jet pressure during polishing can not only improve machining efficiency but also optimize the dwell time distribution, which is of great significance for enhancing machining accuracy and process stability. To achieve these objectives, the effects of jet pressure on particle velocity, impact angle, and impact position were first investigated through theoretical analysis and computational fluid dynamics (CFD) simulations. Subsequently, fixed-point jet polishing experiments were conducted under different jet pressures. The experimental results showed that the material removal distributions under different jet pressures were essentially consistent, while the material removal depth exhibited a power-law increase with jet pressure. On this basis, an amplitude-scaling modeling method based on profile shape consistency was proposed to establish a predictive model of the dynamic-jet-pressure tool influence function (DJP-TIF), which was further used to calculate the variation in maximum removal depth under dynamic jet pressure. Finally, material removal experiments were performed under different pressure change rates. The experiments revealed that, at the same instantaneous pressure, the material removal distributions obtained during pressure increase and pressure decrease were essentially identical and were only minimally affected by the pressure change rate. These results indicate that the instantaneous material removal distribution is governed primarily by the current jet pressure level, with no significant dependence on whether the pressure is increasing or decreasing, or on the pressure change rate. Meanwhile, the experimentally measured maximum removal depths under dynamic jet pressure were in good agreement with the predictions obtained from the DJP-TIF model based on the pressure scaling factor, thereby validating the effectiveness of the model under dynamic jet-pressure conditions. This study further enhances the machining capability of jet polishing and provides a new solution for the high-efficiency and high-precision machining of key components such as ultra-precision optical elements and molds.