Multi-Layer Wet Friction Material Bonding for Material Flexibility
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Solution Overview
Problem
Existing methods for producing multi-layer wet-running friction materials face challenges in simplifying the production process by independently manufacturing the underlayer and toplayer from different materials before bonding them together, which are not restricted by the multi-layer process.
Innovation Solution
The method involves manufacturing the underlayer and toplayer separately using different materials, then bonding them together using temperature and pressure in a continuous or discontinuous process, with the interface designed to be either dense or porous, and utilizing a binder material to achieve a stable composite.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the underlayer and toplayer are manufactured independently from different materials before bonding, then material selection freedom and production flexibility are improved, but the bonding process complexity increases
Solution Approach 1:
The friction material is divided into two independently manufactured layers (underlayer and toplayer) made from different materials, allowing each layer to be optimized separately for specific functions while maintaining production flexibility and material selection freedom
Solution Approach 2:
The underlayer and toplayer are pre-manufactured as separate entities with their respective material properties established before the bonding process, enabling independent optimization of each layer's composition and characteristics
2Quantity of substance
If the interface between layers is designed to be porous, then fluid permeability is improved, but bonding strength may be reduced
Solution Approach 1:
The interface between layers is designed with specific local properties (porous or dense) depending on the functional requirements, allowing different regions of the multi-layer structure to have optimized characteristics for their specific purposes
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 allows for greater freedom in material selection and production, resulting in a stable multi-layered friction material suitable for various automotive applications, such as dual-clutch transmissions and clutches, with improved bonding strength and flexibility.
Implementation Method 1
bonding them together using temperature and pressure in a continuous or discontinuous process, with the interface designed to be either dense or porous, and utilizing a binder material to achieve a stable composite
Implementation Method 2
bonding them together using temperature and pressure in a continuous or discontinuous process
Implementation Method 3
bonding them together using temperature and pressure in a continuous or discontinuous process
Data Source
Figure 1~5
Figure 6
AI summary
The invention relates to a method for producing a multi-layered wet friction material (14) having at least one bottom layer (2) and at least one top layer (1), which are bonded to one another. To simplify the production of a multi-layered wet friction material (14), the bottom layer (2) and the top layer (1) are initially produced independently of one another from different materials, before the bottom layer (2) is connected to the top layer (1).