# Experimental Study on Abrasive Flow Polishing of Grooves and Oil Holes of Aircraft Engine Main Bearing

## TL;DR

This study shows that abrasive flow machining improves the surface quality of aircraft engine bearings, making them more efficient and durable.

## Contribution

The study demonstrates the effectiveness of abrasive flow machining in enhancing bearing surface quality and sets a foundation for process optimization.

## Key findings

- Abrasive flow machining significantly improves surface roughness and residual compressive stress in aircraft engine bearings.
- The process meets precision requirements for main bearings, validating its feasibility and effectiveness.
- The study provides a foundation for further optimization of abrasive flow machining processes.

## Abstract

This study addresses the challenges in machining the raceways and oil holes of aircraft engine bearing rings by conducting abrasive flow machining experiments on main bearing rings which had undergone ultra-precision grinding. Viscoelastic abrasive media containing cubic boron nitride of different particle sizes is used during the experiments. The results show that bearing performance is improved significantly in terms of surface roughness and residual compressive stress consequently; the overall surface quality is raised. The machining process meets the precision requirements for the main bearings of this type of aircraft engine, validating the feasibility and effectiveness of Abrasive Flow Machining (AFM), and the foundation for further optimization of this process is set through this research.