Plated Slide Member Structure to Prevent Peeling on Titanium

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Solution Overview

Problem

The existing slide members with plated slide layers incorporating fluorine compounds face issues with peeling, especially when used with titanium alloys, and struggle to maintain enhanced sliding performance while ensuring cohesion and corrosion resistance.

Innovation Solution

A slide member design featuring a base material with a plated slide layer containing a solid lubricant and an intermediate plated layer between the base material and the plated slide layer, where the solid lubricant content is between 30 and 70 vol%, and the intermediate layer is formed with metals like nickel, copper, or zinc, enhancing cohesion and sliding performance while resisting peeling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the content of fine particles of fluorine compound in plated slide layer is increased to enhance sliding capabilities, then sliding performance is improved, but the plated slide layer becomes susceptible to peeling

Engineering Contradiction:

Improvesliding performanceVSAvoidcohesion of plated slide layer

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

An intermediate plated layer is introduced between the base material and the plated slide layer containing fluorine compound particles. This intermediate layer acts as a mediator that enhances adhesion between the base material and the plated slide layer, preventing peeling even when the fluorine compound content is increased to 30-70 vol% for optimal sliding performance.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The slide member employs a composite structure consisting of a base material, an intermediate plated layer, and a plated slide layer containing solid lubricant particles. This multi-layer composite material structure allows the plated slide layer to have high fluorine compound content for sliding performance while the intermediate layer provides cohesive strength to prevent peeling.

Inventive Principle:

Principle #40Composite materials

2Reliability

If a plated slide layer is formed on the surface of titanium alloy to improve sliding performance, then sliding capabilities are enhanced, but the plated slide layer is susceptible to peeling

Engineering Contradiction:

Improvesliding performanceVSAvoidcohesion between plated slide layer and base material

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

When titanium alloy is used as the base material, an intermediate plated layer is formed between the titanium alloy and the plated slide layer. This intermediate layer serves as a mediator that improves adhesion between the titanium alloy base material and the plated slide layer, preventing peeling while allowing the plated slide layer to provide enhanced sliding performance.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If the plated slide layer contains high content of solid lubricant to enhance sliding capabilities, then sliding performance is improved, but cohesion between plated slide layer and base material decreases

Engineering Contradiction:

Improvesliding capabilitiesVSAvoidcohesion

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The plated structure is segmented into multiple functional layers: a base material layer, an intermediate plated layer for adhesion, and a plated slide layer containing 30-70 vol% solid lubricant particles for sliding performance. This segmentation allows each layer to optimize its function without compromising the overall structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The slide member uses a composite plated structure where the intermediate plated layer provides cohesive strength and the plated slide layer provides sliding performance through high solid lubricant content (30-70 vol%). The combination of these composite materials allows simultaneous achievement of high cohesion and high sliding capabilities.

Inventive Principle:

Principle #40Composite materials

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 design effectively enhances sliding performance while maintaining high cohesion and resisting peeling, even with titanium alloys, and offers improved corrosion resistance for outdoor use, extending the lifespan of bicycle and fishing tackle components.

Implementation Method 1

a plated slide layer containing a solid lubricant

Methodology Applied

Scientific EffectSolid lubrication: Lubrication

Implementation Method 2

an intermediate plated layer situated between the base material and the plated slide layer, and adapted for increasing cohesion of the base material and the plated slide layer

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS11274260B2Slide member, bicycle component using slide member, and fishing tackle component using slide member

Publication Date: 2022.03.15 SHIMANO INC

AI summary

A slide member is provided with a base material, a plated slide layer and an intermediate plated layer. The plated slide layer contains a solid lubricant. The intermediate plated layer is disposed between the base material and the plated slide layer, the intermediate plated layer increasing cohesion of the base material and the plated slide layer. The plated slide layer has a content of the solid lubricant in a range from 30 to 70 vol %, inclusive.