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首页> 外文期刊>Journal of Manufacturing Processes >A high-precision prediction model of surface roughness in abrasive belt flexible grinding of aero-engine blade
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A high-precision prediction model of surface roughness in abrasive belt flexible grinding of aero-engine blade

机译：空气发动机刀片磨料带柔性研磨中表面粗糙度高精度预测模型

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摘要

This study presents a numerical simulation method to precisely predict the machined surface topography of aeroengine blade while using abrasive belt grinding technique. Considering the effect of curvature change of blade on the elastic contact state, a complex simulation model of the contact deformation at grinding interface was established, and the numerical prediction model of nonlinear time-varying contact deformation in whole grinding process was obtained. Furthermore, this contact deformation law was superimposed on motion trajectory equation of abrasive particles to accurately obtain the space location of the grinding points. The formation of the belt surface morphology was obtained by blue-light scanning device and Johnson transform system. The machined surface roughness with different curvature changes were acquired through the generation algorithm of workpiece morphology under the conditions of different grain sizes and feed rates. The grinding experiments were conducted to obtain that the average error values between simulated and measured surface roughness of blade maintained at about 4%. In addition, the difference of surface roughness between blade convex and concave surface was detailly explained based on a mathematical model. This work can be used to provide a beneficial guidance for the high-precision prediction of surface roughness of grinding aero-engine blade.
机译：本研究提出了一种数值模拟方法，精确地预测了使用磨料带式研磨技术的航空发动机叶片的加工表面形貌。考虑到叶片曲率变化对弹性接触状态的影响，建立了磨削界面处的接触变形的复杂模拟模型，得到了整个研磨过程中非线性时变形变形的数值预测模型。此外，这种接触变形法叠加在磨料颗粒的运动轨迹方程上，以精确地获得研磨点的空间位置。通过蓝光扫描装置和Johnson变换系统获得皮带表面形态的形成。通过不同晶粒尺寸和饲料速率的条件下工件形态的生成算法获取具有不同曲率变化的加工表面粗糙度。进行研磨实验，以获得模拟和测量表面粗糙度之间的平均误差值保持在约4％。另外，基于数学模型详细说明了刀片凸和凹面之间的表面粗糙度差异。该工作可用于为研磨航空发动机叶片的表面粗糙度的高精度预测提供有益的指导。

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