Tungsten Wire Copper Plating Tire Reinforcement
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Solution Overview
Problem
Conventional steel cords in tires undergo significant elongation under heavy loads, leading to deformation issues due to their material properties, which cannot be effectively inhibited.
Innovation Solution
A tungsten wire with a high tungsten content and a copper-plated surface is used to reinforce rubber materials, providing enhanced tensile strength and elastic modulus to prevent deformation, while a copper plating layer increases adhesion with the rubber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If steel cords are used as reinforcement members in tires, then the tire structure is strengthened, but the tire undergoes significant elongation and deformation under heavy loads due to the material properties of steel
Solution Approach 1:
The patent changes the material parameter from steel to tungsten, which has fundamentally different physical properties including higher elastic modulus and lower elongation. This parameter change resolves the contradiction by providing both the required strength and reduced deformation characteristics
Solution Approach 2:
The patent creates a composite structure by coating tungsten wire with copper plating layer. The tungsten core provides high strength and low elongation, while the copper coating improves adhesion to rubber and prevents corrosion, together resolving multiple contradictory requirements
2Weight of moving object
If the number of steel cords is reduced to lower tire weight, then fuel efficiency improves, but the tire may become insufficiently reinforced
Solution Approach 1:
The patent changes the reinforcement material from steel to tungsten, which has superior strength-to-weight ratio. This allows reducing the number of cords while maintaining or enhancing reinforcement effectiveness, thus reducing tire weight without compromising strength
Solution Approach 2:
The patent extracts only the essential reinforcement function from steel cords and achieves it more efficiently with fewer tungsten cords, removing unnecessary weight while preserving the critical strength function
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 tungsten wire effectively inhibits deformation in rubber materials, improving handling stability and fuel efficiency, and allows for a reduction in the number of steel cords, thereby reducing tire weight.
Implementation Method 1
a copper plating layer increases adhesion with the rubber
Data Source
AI summary
A tungsten wire according one aspect of the present disclosure includes: a metal wire containing one of tungsten and a tungsten alloy; and a plating layer which covers a surface of the metal wire. The plating layer contains copper.