首页|Design and grindability assessment with cup shaped electroplated CBN wheel grinding turbine disc slots of powder metallurgy super alloy FGH96

Design and grindability assessment with cup shaped electroplated CBN wheel grinding turbine disc slots of powder metallurgy super alloy FGH96

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The machining surface integrity of aero-engine turbine disc slots has a significant impact on their fatigue life and service performance,and achieving efficiency and high-precision machining is still a great challenge.The high machining requirements of future aeroengine turbine disc slots will be difficult to satisfy using the broaching method.In addition,existing methods of slot machin-ing face difficulties in ensuring surface integrity.This study explored a cup shaped electroplated Cubic Boron Nitride(CBN)abrasive wheel for profile grinding the turbine disc slots of FGH96 powder metallurgy superalloy.The matrix structure of the cup shaped abrasive wheel was designed and verified.A profile grinding experiment was conducted for fir-tree slots on a five-axis machining center.The accuracy and the surface integrity were analyzed.Results show that the key dimension detection results of the slots were within the allowable tolerance range.Meanwhile,an average sur-face roughness Ra of 0.55 μm was achieved,the residual stress was compressive,the plastic defor-mation layer thickness was less than 5 μm,and the hardening layer thickness was less than 20 μm.The research findings provide a new approach to machining the slots of aviation engine turbine discs and guidance for the high-quality processing of complex components.

Profile grindingSurface integrityCup shaped CBN abrasive wheelTurbine disc slotsFGH96

Benkai LI、Wenfeng DING、YeJun ZHU、Changhe LI、Yanbin ZHANG、Min YANG、Xiao MA、Mingzheng LIU、Xin CUI

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School of Mechanical Engineering,Qingdao University of Technology,Qingdao 266520,China

National Key Laboratory of Science and Technology on Helicopter Transmission,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

Collegeof Engineering,Nanjing Agricultural University,Nanjing 210031,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaMajor Special Projects of Aeroengine and Gas TurbineSpecial Fund of Taishan Scholars ProjectYouth Talent Promotion Project in ShandongNatural Science Foundation of Shandong ProvinceNatural Science Foundation of Shandong ProvinceNatural Science Foundation of Shandong ProvinceNatural Science Foundation of Shandong ProvinceQingdao Science and Technology Planning Park Cultivation PlanNatural Science Foundation of Jiangsu Province

5230547752375447523054742017-Ⅶ-0002-0095tsqn202211179SDAST2021qt12ZR2023QE057ZR2022QE028ZR2021QE116ZR2020KE02723-1-5-yqpy-17-qyBK20210407

2024

10.1016/j.cja.2023.12.030

中国航空学报(英文版)
中国航空学会

中国航空学报(英文版)

CSTPCDEI
影响因子：0.847
ISSN：1000-9361
年,卷(期)：2024.37(9)
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