Scholarlink

<p>Addressing the challenges of poor surface roughness and inconsistent batch results caused by uneven pressure distribution in the flow field during abrasive flow machining (AFM) of screws with large length-diameter ratio and complex structural mutations, this paper proposes a new AFM method for spiral surfaces. An abrasive flow field model for screw surface was established to analyze the influence of screw rotational speed and inlet pressure on axial pressure distribution. Based on above analysis, new pressure difference feedback control strategy was designed and validated through machining tests. Results indicate that inlet pressure exerts a more significant effect on pressure distribution uniformity than screw speed. Structural differences cause pressure difference to sequentially decrease across the homogenization, compression, and feed sections. Applying back pressure at the outlet optimizes pressure distribution. When back pressure is maintained at 64% to 70% of the inlet pressure, pressure difference in the homogenization section is reduced by approximately 71.25%, overall pressure uniformity is increased by about 56.38%, and surface roughness (Ra) decreases from 0.164&#xa0;μm to 0.084&#xa0;μm. Further increasing back pressure yields insignificant additional improvement in surface quality and excessively high back pressure disrupts the flow field. To achieve precise pressure difference control, a cooperative control strategy integrating an electro-hydraulic servo system with AFM is proposed. This strategy utilizes feedback signals from displacement or pressure sensors to enable closed-loop regulation via PLC-executed PID algorithms.</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

Control of pressure distribution uniformity during abrasive flow machining process with large length-diameter ratio plastic screw

  • 期刊论文

  • 发表日期：

    2026年1月21日

查看全文
  • Yaojie Cai,
  • Panyu Qian,
  • Donghui Wen,
  • Zhiwei Xu

摘要

Addressing the challenges of poor surface roughness and inconsistent batch results caused by uneven pressure distribution in the flow field during abrasive flow machining (AFM) of screws with large length-diameter ratio and complex structural mutations, this paper proposes a new AFM method for spiral surfaces. An abrasive flow field model for screw surface was established to analyze the influence of screw rotational speed and inlet pressure on axial pressure distribution. Based on above analysis, new pressure difference feedback control strategy was designed and validated through machining tests. Results indicate that inlet pressure exerts a more significant effect on pressure distribution uniformity than screw speed. Structural differences cause pressure difference to sequentially decrease across the homogenization, compression, and feed sections. Applying back pressure at the outlet optimizes pressure distribution. When back pressure is maintained at 64% to 70% of the inlet pressure, pressure difference in the homogenization section is reduced by approximately 71.25%, overall pressure uniformity is increased by about 56.38%, and surface roughness (Ra) decreases from 0.164 μm to 0.084 μm. Further increasing back pressure yields insignificant additional improvement in surface quality and excessively high back pressure disrupts the flow field. To achieve precise pressure difference control, a cooperative control strategy integrating an electro-hydraulic servo system with AFM is proposed. This strategy utilizes feedback signals from displacement or pressure sensors to enable closed-loop regulation via PLC-executed PID algorithms.