Scholarlink

<p>Aluminum alloys, despite their ductility and toughness, present significant challenges in precision machining, particularly for large-diameter components. Ultrasonic-assisted grinding (UAG) has emerged as a superior alternative to conventional methods, offering enhanced material removal efficiency and surface integrity. This study investigates four critical UAG parameters governing the relative abrasive particle velocity during large-diameter spherical mirror processing: applied abrasive pressure, grinding disc rotational speed, mirror surface velocity, and ultrasonic vibration-induced speed. A mechanistic model was developed to quantify the effects of disc speed, pressure, and abrasive particle size on material removal rate (MRR). Controlled grinding experiments demonstrated that ultrasonic-coupled vibration increased material removal by 19.2% under 300&#xa0;MPa pressure over three hours. Iterative parameter optimization reduced the relative error between experimental and simulated MRR by 59.8%. The findings provide a validated framework for optimizing UAG processes, enabling high-precision, high-efficiency machining of large aluminum alloy mirrors while minimizing residual stress.</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

A Mechanistic Model for Enhanced Material Removal and Residual Stress Mitigation in Ultrasonic-Assisted Grinding of Large-Diameter Aluminum Alloy Spherical Mirrors

  • 期刊论文

  • 发表日期：

    2025年10月20日

查看全文
  • Weijie Fu,
  • Lizhang Luo,
  • Hanwen Zhang,
  • Xinming Zhang,
  • Yutang Zhai

摘要

Aluminum alloys, despite their ductility and toughness, present significant challenges in precision machining, particularly for large-diameter components. Ultrasonic-assisted grinding (UAG) has emerged as a superior alternative to conventional methods, offering enhanced material removal efficiency and surface integrity. This study investigates four critical UAG parameters governing the relative abrasive particle velocity during large-diameter spherical mirror processing: applied abrasive pressure, grinding disc rotational speed, mirror surface velocity, and ultrasonic vibration-induced speed. A mechanistic model was developed to quantify the effects of disc speed, pressure, and abrasive particle size on material removal rate (MRR). Controlled grinding experiments demonstrated that ultrasonic-coupled vibration increased material removal by 19.2% under 300 MPa pressure over three hours. Iterative parameter optimization reduced the relative error between experimental and simulated MRR by 59.8%. The findings provide a validated framework for optimizing UAG processes, enabling high-precision, high-efficiency machining of large aluminum alloy mirrors while minimizing residual stress.