<p>The pipe joint is an important component of the fuel solenoid valve used in aircraft engines. The overhang length of the tool for machining the deep hole of the pipe joint is 41 mm, with a diameter of 3.8 mm, and the length-to-diameter ratio exceeds 10, resulting in poor tool stiffness. Vibration is prone to occur when boring the bottom surface of deep holes, resulting in a low product qualification rate. This paper establishes a finite element model for deep hole bottom boring based on DEFORM 3D software, exploring the influence of tool angle variation on cutting force and reducing tool chatter by decreasing the cutting force. The results indicate that: Within the selected range of research parameters, the order of influence of various tool angles on cutting force is: rake angle (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">${\gamma }_{o}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>γ</mi> <mi>o</mi> </msub> </math></EquationSource> </InlineEquation>) > main cutting edge angle (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">${\kappa }_{r}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>κ</mi> <mi>r</mi> </msub> </math></EquationSource> </InlineEquation>) > clearance angle (<InlineEquation ID="IEq3"> <EquationSource Format="TEX">${\alpha }_{o}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>α</mi> <mi>o</mi> </msub> </math></EquationSource> </InlineEquation>) > minor cutting edge angle (<InlineEquation ID="IEq4"> <EquationSource Format="TEX">${\kappa }_{r}^{,}$</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mi>κ</mi> <mrow> <mi>r</mi> </mrow> <mo>,</mo> </msubsup> </math></EquationSource> </InlineEquation>). The optimal tool angle combination is <InlineEquation ID="IEq5"> <EquationSource Format="TEX">${\gamma }_{o}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>γ</mi> <mi>o</mi> </msub> </math></EquationSource> </InlineEquation>=14°, <InlineEquation ID="IEq6"> <EquationSource Format="TEX">${\alpha }_{o}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>α</mi> <mi>o</mi> </msub> </math></EquationSource> </InlineEquation>=14°, <InlineEquation ID="IEq7"> <EquationSource Format="TEX">${\kappa }_{r}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>κ</mi> <mi>r</mi> </msub> </math></EquationSource> </InlineEquation>=105°, <InlineEquation ID="IEq8"> <EquationSource Format="TEX">${\kappa }_{r}^{,}$</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mi>κ</mi> <mrow> <mi>r</mi> </mrow> <mo>,</mo> </msubsup> </math></EquationSource> </InlineEquation>=9°. Using a miniature triaxial accelerometer, boring experiments were conducted with the cutting tool before and after optimization. Compared to the pre-optimization of the tool angle, the optimized tool exhibited a 41.67% reduction in axial acceleration magnitude and a 37.86% decrease in its fluctuation level; a 47.68% reduction in radial acceleration magnitude and a 34.96% decrease in its fluctuation level; a 42.90% reduction in tangential acceleration magnitude; and a 45.11% decrease in its fluctuation level, effectively reducing tool chatter.</p>

Simulation and Optimization Analysis of Tool Angle Parameters for Deep Hole Boring of 1Cr18Ni9Ti

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发表日期：

2025年11月14日

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Yuning Zhou,
Guangfeng Shi,
Xinwei Liu,
Jinglong Gao,
Xiao Li,
Qingxin Meng

摘要

The pipe joint is an important component of the fuel solenoid valve used in aircraft engines. The overhang length of the tool for machining the deep hole of the pipe joint is 41 mm, with a diameter of 3.8 mm, and the length-to-diameter ratio exceeds 10, resulting in poor tool stiffness. Vibration is prone to occur when boring the bottom surface of deep holes, resulting in a low product qualification rate. This paper establishes a finite element model for deep hole bottom boring based on DEFORM 3D software, exploring the influence of tool angle variation on cutting force and reducing tool chatter by decreasing the cutting force. The results indicate that: Within the selected range of research parameters, the order of influence of various tool angles on cutting force is: rake angle ( ${\gamma }_{o}$ $γ_{o}$ ) > main cutting edge angle ( ${\kappa }_{r}$ $κ_{r}$ ) > clearance angle ( ${\alpha }_{o}$ $α_{o}$ ) > minor cutting edge angle ( ${\kappa }_{r}^{,}$ $κ_{r}^{,}$ ). The optimal tool angle combination is ${\gamma }_{o}$ $γ_{o}$ =14°, ${\alpha }_{o}$ $α_{o}$ =14°, ${\kappa }_{r}$ $κ_{r}$ =105°, ${\kappa }_{r}^{,}$ $κ_{r}^{,}$ =9°. Using a miniature triaxial accelerometer, boring experiments were conducted with the cutting tool before and after optimization. Compared to the pre-optimization of the tool angle, the optimized tool exhibited a 41.67% reduction in axial acceleration magnitude and a 37.86% decrease in its fluctuation level; a 47.68% reduction in radial acceleration magnitude and a 34.96% decrease in its fluctuation level; a 42.90% reduction in tangential acceleration magnitude; and a 45.11% decrease in its fluctuation level, effectively reducing tool chatter.