Research on Contact Characteristics of Belt Grinding of Aero-engine Blade Based on Compliance Adjustment of Contact Wheel

doi:10.3901/JME.2023.15.354

Abstract

Abstract: Aero-engine blade is a typical component which is difficult to machine and easy to deform. Because of the weak rigidity, changes of curvature, inconsistent thickness, the machining rigidity of blade is varied at different positions during grinding process. This will cause changes in contact pressure distribution, contact area and other states, and eventually lead to inconsistent surface processing quality. Therefore, in order to control the grinding contact state of weak rigid blade, a new type of grinding contact wheel with controllable flexibility is designed based on the analysis of blade processing characteristics. The simulation verifies the feasibility of the compliance control of contact wheel and the difference of the contact state at different positions of the blade. Besides, the study on the contact characteristics between grinding wheel and blade surface is carried out to reveal the effects of different compliance of contact wheel on contact pressure distribution, normal contact force and machining deformation. Combined with the force displacement curve, the change of compliance characteristics of contact wheel is explained. The grinding contact experiments show that the compliance of contact wheel has a significant impact on the grinding contact characteristics, and the normal contact force decreases with the increase of compliance, with a maximum decrease of about 50%. An efficient and reliable implementation method is put forward to adapt to the changes of machining states at different positions of weakly rigid blades and obtain uniform machining quality based on active compliance regulation.

Key words: blade, contact wheel, compliance regulation, belt grinding, contact characteristics

CLC Number:

TG580

DUAN Jihao, ZHOU Zewei, AN Jiale, GAO Feng, LI Yan, HUAI Wenbo. Research on Contact Characteristics of Belt Grinding of Aero-engine Blade Based on Compliance Adjustment of Contact Wheel[J]. Journal of Mechanical Engineering, 2023, 59(15): 354-365.

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