Rolling Bearing Laser Welding Fixation Method

Solution Overview

Problem

The productivity of rolling bearing devices is low due to the long hardening time of anaerobic adhesive agents, which requires prolonged bonding times and poor operational efficiency, especially when preloading is applied, necessitating the use of preloading jigs.

Innovation Solution

A method involving the application of an adhesive agent to fitting portions of rolling bearings and subsequent laser welding without thermal deformation, allowing for immediate preload application and bonding before the adhesive hardens, thereby enhancing operational efficiency and productivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If an anaerobic adhesive agent is used to bond the shaft and inner ring or housing and outer ring, then bonding strength is achieved, but the hardening time is long which reduces productivity

Engineering Contradiction:

Improvebonding strengthVSAvoidproductivity

Core Design Contradiction:

StrengthVSProductivity

Solution Approach 1:

The adhesive agent is applied to the fitting portions before the rolling bearings are assembled and preloaded. This preliminary application allows the adhesive to be in position before the bonding process begins, enabling subsequent rapid laser welding to occur immediately after assembly without waiting for adhesive application during the preloading process

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Laser welding is used to replace or supplement the traditional mechanical bonding process. The laser welding provides rapid bonding (significantly faster than anaerobic adhesive hardening) while maintaining the necessary bonding strength, thereby resolving the contradiction between achieving strong bonds and maintaining high productivity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Stability of the object's composition

If a preload is applied to the rolling bearing during bonding, then proper fitting engagement is achieved, but the operational efficiency deteriorates due to the need to keep the device on a preloading jig until hardening

Engineering Contradiction:

Improvefitting engagementVSAvoidoperational efficiency

Core Design Contradiction:

Stability of the object's compositionVSProductivity

Solution Approach 1:

The adhesive agent is applied to the fitting portions before the rolling bearings are assembled and preloaded. This preliminary application allows the adhesive to be in position before the bonding process begins, enabling subsequent rapid laser welding to occur immediately after assembly without waiting for adhesive application during the preloading process

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Laser welding is used to replace or supplement the traditional mechanical bonding process. The laser welding provides rapid bonding (significantly faster than anaerobic adhesive hardening) while maintaining the necessary bonding strength, thereby resolving the contradiction between achieving strong bonds and maintaining high productivity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 method enables rapid fixation of rolling bearing components with a preloaded state and sufficient bonding strength, independent of adhesive hardening time, improving operational efficiency and productivity while preventing positional displacement and contamination.

Implementation Method 1

welding, in a state where the inner rings or the outer rings to which the adhesive agent is applied in the adhesive agent applying step are brought close to each other due to pushing of the inner rings or the outer rings in the axial direction, the pushed inner rings to the first member or the pushed outer rings to the second member by laser welding using laser power which does not generate thermal deformation

Methodology Applied

Scientific EffectLaser welding: Laser Beam Welding

Data Source

PatentUS8615884B2Method of manufacturing rolling bearing device

Publication Date: 2013.12.31 SEIKO INSTR INC

AI summary

A method of manufacturing a rolling bearing device which can improve operational efficiency and can enhance productivity thereof is provided. The method includes the steps of: applying an adhesive agent to fitting portions formed between inner rings of two rolling bearings which are arranged coaxially in a spaced-apart manner in an axial direction and a shaft which is fitted in the inner rings and fitting portions formed between outer rings of two rolling bearings and a sleeve which is fitted on the outer rings; bringing the inner rings and the shaft into fitting engagement and the outer rings and the sleeve into fitting engagement respectively; and welding, in a state where the inner rings to which the adhesive agent is applied in the adhesive agent applying step are brought close to each other due to pushing of the inner rings in the axial direction, the pushed inner rings to the shaft by laser welding using laser power which does not generate thermal deformation of the pushed inner rings.