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Allowance Extraction Considering of Inner and Outer Contour and Experimental Research on Belt Grinding of Hollow Blade

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Chinese Journal of Mechanical Engineering 2023年第3期36卷 230-240页

作者： Yun Huang Ming Wei Guijian Xiao Shuai Liu Yuan Wu College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing 400044China

Aero-engine fan blades of ten use a cavity structure to improve the thrust-to-weight ratio of the ***,the use of the cavity structure brings a series of difficulties to the manufacturing and processing of the *** to the limitation of blade manufacturing technology,it is difficult for the internal cavity structure to achieve the designed contour shape,so the blade has uneven wall thickness and poor consistency,which affects the fatigue performance and airflow dynamic performance of the *** order to reduce the influence of uneven wall thickness,this paper proposes a grinding allowance extraction method considering the double dimension constraints(DDC)of the inner and outer contours of the hollow *** the two dimensions of the inner and outer contours of the hollow *** the premise of satisfying the outer contour constraints,the machining model of the blade is modified according to the distribution of the inwall contour to obtain a more reasonable distribution of the grinding *** the premise of satisfying the contour constraints,according to the distribution of the inwall contour,the machining model of the blade is modified to obtain a more reasonable distribution of the grinding *** the grinding experiment of the hollow blade,the surface roughness is below Ra0.4μm,and the contour accuracy is between-0.05~0.14 mm,which meets the processing *** with the allowance extraction method that only considers the contour,the problem of poor wall thickness consistency can be effectively *** can be used to extract the allowance of aero-engine blades with hollow features,which lays a foundation for the study of hollow blade grinding methods with high service performance.

关键词： double dimension constraints Allowance extraction Abrasive belt grinding

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