Aero-Engine Bearing Ring Finishing with Eccentric Vibratory Layout
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Solution Overview
Problem
Existing rotary finishing tools for aero-engine bearing rings suffer from low finishing efficiency due to weak media action on the surfaces, leading to insufficient surface integrity forming capacity and inefficient polishing and grinding.
Innovation Solution
A finishing device and method that employs an eccentric arrangement of suspension assemblies and a compound motion of the finishing container, utilizing an excitation platform to enhance the impact of finishing media on the bearing ring surfaces, allowing simultaneous machining of multiple rings with improved surface integrity forming capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rotary barrel finishing by floating clamp is used, then the bearing ring can be clamped without damage and each surface can be subjected to one-time finishing, but the bearing ring is located at a central position of the container body at which the motion of the finishing media is weak, leading to low finishing efficiency and processing ability
Solution Approach 1:
The patent introduces an asymmetric excitation mechanism where the container body is excited to perform compound motion (rotation + vibration) instead of simple rotation. The excitation frequency and amplitude create asymmetric motion patterns that enhance media impact on all surfaces of the bearing ring, resolving the contradiction between maintaining finishing accuracy and improving finishing efficiency.
Solution Approach 2:
The patent transforms the static rotation system into a dynamic system by adding vibrational excitation. The container body performs compound motion with variable speed and vibration, making the finishing media act more effectively on the bearing ring surfaces while maintaining the clamping and finishing accuracy requirements.
2Device complexity
If the bearing ring is located at the central position of the container body, then the clamping structure is simplified, but the motion of the finishing media is weak and the acting force of the media is small
Solution Approach 1:
The patent applies mechanical vibration to the container body through an excitation mechanism that generates vibrational motion at specific frequencies and amplitudes. This vibration enhances the motion of finishing media, increasing the media acting force on the bearing ring surfaces while maintaining the simple central clamping structure.
Solution Approach 2:
The patent pre-excites the container body with controlled vibration before and during the finishing process. This preliminary action prepares the finishing media to exert sufficient force on the bearing ring, resolving the contradiction between structural simplicity and media acting force.
3Ease of manufacture
If conventional grinding methods are used, then the mainstream finishing process is maintained, but the surface integrity forming capacity of the bearing ring after grinding is insufficient
Solution Approach 1:
The patent changes the motion parameters of the container body from simple rotation to compound motion (rotation + vibration) with controllable frequency and amplitude. This parameter change enhances the surface integrity forming capacity of the finishing process while maintaining compatibility with conventional grinding methodologies.
Solution Approach 2:
The patent transforms the static grinding process into a dynamic finishing process by introducing vibrational excitation. The dynamic compound motion of the container body enhances material removal and surface formation capabilities, improving surface integrity while building upon conventional grinding methods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves efficient polishing and grinding of aero-engine bearing rings by enhancing the action of finishing media, effectively reducing surface roughness and removing scratches on inner, outer, and end surfaces, thereby improving the surface integrity and finishing efficiency.
Implementation Method 1
utilizing an excitation platform to enhance the impact of finishing media on the bearing ring surfaces
Implementation Method 2
efficient polishing and grinding of aero-engine bearing rings by enhancing the action of finishing media, effectively reducing surface roughness and removing scratches
Data Source
AI summary
Provided are a finishing device for aero-engine bearing rings and a finishing method for distributed aero-engine bearing rings, which belong to the technical field of grinding or polishing devices or techniques, and solve the technical problem of low finishing efficiency of an existing rotary barrel finishing by floating clamp. N suspension assemblies are arranged in a container body, and the centers of the N suspension assemblies are located on a second virtual circle with the center of a bottom wall of the container body as the center of a circle. Through an eccentric arrangement of a bearing ring to be finished, an internal space of the container body is effectively and reasonably utilized, and N bearing rings can be simultaneously finished.