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<p>This paper proposes a compound temperature control machining strategy based on pecking drilling for Aramid fiber reinforced polymer (AFRP), addressing thermal damage and hole wall defects. A temperature rise prediction model integrates a thermal-mechanical coupling model with a dynamic heat dissipation factor (γ = 0.18) and pecking correction coefficient (η = 0.58–1.08). Seven pecking strategies are designed, with full-factor experiments revealing their impact on machining quality. The complete tool withdrawal strategy (δ = λ = 4&#xa0;mm) reduces cutting temperature by 41.2% (ΔT = 57&#xa0;°C at 3000&#xa0;rpm/20&#xa0;mm/min) and force fluctuations by 33%, leveraging forced chip removal and thermal relaxation. High feed (60&#xa0;mm/min) and speed (6000&#xa0;rpm) boost efficiency but cause resin degradation (157&#xa0;°C) and cross-shaped burrs. The optimal pecking depth-to-lift ratio (δ/λ = 1.0) quantifies fiber fracture mode transition from shear to pull-out, guiding high-precision AFRP machining.</p>

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Reducing drilling damage in AFRP through peck drilling—a mechanistic analysis combining temperature rise prediction modeling

  • 期刊论文

  • 发表日期：

    2026年7月17日

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  • Wentian Shi,
  • Jianing Li,
  • Jian Li,
  • Jie Li,
  • Xuejun Liu,
  • Zhenyang Wen,
  • Zhiyu Gao,
  • Tong Ma

摘要

This paper proposes a compound temperature control machining strategy based on pecking drilling for Aramid fiber reinforced polymer (AFRP), addressing thermal damage and hole wall defects. A temperature rise prediction model integrates a thermal-mechanical coupling model with a dynamic heat dissipation factor (γ = 0.18) and pecking correction coefficient (η = 0.58–1.08). Seven pecking strategies are designed, with full-factor experiments revealing their impact on machining quality. The complete tool withdrawal strategy (δ = λ = 4 mm) reduces cutting temperature by 41.2% (ΔT = 57 °C at 3000 rpm/20 mm/min) and force fluctuations by 33%, leveraging forced chip removal and thermal relaxation. High feed (60 mm/min) and speed (6000 rpm) boost efficiency but cause resin degradation (157 °C) and cross-shaped burrs. The optimal pecking depth-to-lift ratio (δ/λ = 1.0) quantifies fiber fracture mode transition from shear to pull-out, guiding high-precision AFRP machining.