Thin-Wall Bearing Ring Reinforcement for Precision Machining
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Solution Overview
Problem
Current manufacturing processes for thin-wall bearings, particularly flexible bearings, face challenges with low efficiency, high costs, and limited precision due to deformation issues during machining, which hinder the achievement of high manufacturing accuracy and increased speed in main machine operations.
Innovation Solution
A method involving reinforcement of thin-wall bearing rings in both radial and axial directions, followed by quenching and tempering heat treatment, and subsequent grinding, hard cutting, and superfinishing processes to remove machining allowances and reinforcing parts, thereby enhancing machining accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If normal cutting process is used for thin-wall bearing rings, then manufacturing cost is reduced, but manufacturing precision deteriorates due to deformation during machining
Solution Approach 1:
The patent applies preliminary action by reinforcing the thin-wall bearing rings before machining operations. The reinforcement structure is added in advance to prevent deformation during subsequent cutting, grinding, and heat treatment processes, thereby enabling normal manufacturing processes to achieve high precision without additional complexity
Solution Approach 2:
The patent changes the structural parameter of the thin-wall bearing ring by adding a reinforcement structure with specific geometric parameters (thickness, width, positioning). This parameter change transforms the ring from a deformation-prone thin-wall structure to a rigid structure that can withstand machining forces without deforming
2Manufacturing precision
If multiple grinding and tempering processes are added to improve precision, then manufacturing precision improves, but productivity deteriorates due to increased processing time
Solution Approach 1:
The reinforcement structure is added preliminarily before machining to prevent deformation, which eliminates the need for multiple corrective grinding and tempering operations. This preliminary structural preparation allows normal single-pass machining to achieve high precision, thereby improving productivity
Solution Approach 2:
The patent extracts the deformation problem from the machining process by adding a separate reinforcement structure. This separation allows the thin-wall ring to be machined using normal processes without requiring special multi-step precision processes, thus improving manufacturing efficiency
3Productivity
If thin-wall bearing rings are machined with normal processes, then processing speed is increased, but manufacturing precision deteriorates due to clamping deformation
Solution Approach 1:
The reinforcement structure is added in advance to provide rigidity during machining operations. This preliminary structural preparation enables the use of normal high-speed machining processes without causing clamping deformation, thereby achieving both high processing speed and high manufacturing precision simultaneously
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
This approach significantly improves machining accuracy and reduces processing steps and costs by minimizing clamping deformation and allowing for normal processing techniques, resulting in higher precision and efficiency in producing thin-wall bearings.
Implementation Method 1
carrying out quenching and tempering heat treatment to the reinforcing ring obtained in the step S1 after reinforcement
Data Source
AI summary
The invention provides a manufacturing method for thin-wall bearing and a method for machining a thin-wall inner ring/outer ring as well as a precision flexible bearing. The method for machining the thin-wall inner ring/outer ring comprises the following steps of: S0, providing a thin-wall ring with machining allowance left; S1: reinforcing along the radial direction and/or axial direction of the thin-wall ring; S2: carrying out quenching-tempering heat treatment on the reinforcing ring obtained by reinforcement in the S1; S3: carrying out corresponding grinding, hard cutting and super finishing on the reinforcing ring after receiving heat treatment, which includes removal of the machining allowance and a reinforcing part obtained by reinforcement in the S1, thereby obtaining finished thin-wall ring product. The thin-wall ring reinforced machining method substantially reduces and even avoids deformation of the thin-wall ring in all manufacturing links, thereby obtaining very high machining precision. The precision thin-wall bearing and the precision flexible bearing can be manufactured by fitting of the precision thin-wall ring and a precision rolling body.