Experimental research of new belt grinding method for consistency of blisk profile and surface precision
XIAO Guijian;HUANG Yun;YI Hao;The State Key Laboratory of Mechanical Transmissions,Chongqing University;
As the blisk is comprised of many blades,according to the"law of cask",its performance and life are dependent on the worst PF-precision(profile accuracy and surface quality)of blade.So,besides meeting the requirement of the PFprecision,it is important to improve the PF-precision consistency of blisk blade.The new belt grinding method for the consistency of the blisk profile and surface precision is introduced in this paper,the reciprocating motion and self-sharpening grinding are used to efficiently realize material removal,and at the same time,the method of automatic update periodic is used to improve the PF-precision consistency.The new method of belt grinding for the PF-precision of the blisk is illustrated,the consistency control equation for the PF-precision of the blisk is established,and then,the belt grinding experiment is applied to 11 blades of the aeroengine blisk.Meanwhile,the standard deviation is used to analyze the consistency of PF-precision of blisk.The results show that the surface roughness is less than 0.25μm,the profile accuracy is less than 0.05 mm and the PF-precision consistency is significantly improved.
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