Laminated Fluid Structure Elastic Constant Design
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Solution Overview
Problem
Existing laminated structures for fluid passages often experience deformation due to adjacent members, leading to changes in fluid resistance and difficulty in controlling pressure devices, and synthetic resin members have inferior strength and durability issues over time.
Innovation Solution
A laminated structure with two or more block members, where the intermediate member has a higher elastic constant than the adjacent block members, joined by diffusion bonding or welding, using aluminum-magnesium-silicon and aluminum-copper-magnesium alloys for lightweight and durable construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If members are joined with other members in a state in which fluid flow passages are formed therein, then the structure becomes compact and space is reduced, but the flow passages become deformed by the other members causing fluid resistance changes
Solution Approach 1:
The patent applies parameter changes by selecting materials with different elastic constants for adjacent block members. Specifically, it uses aluminum alloy (e.g., JIS A6061) with lower elastic constant for members containing flow passages and aluminum alloy (e.g., JIS A2017) with higher elastic constant for adjacent members. This material parameter differentiation ensures that the softer material deforms preferentially during joining, protecting the flow passages in harder members from deformation while enabling compact lamination.
2Weight of moving object
If synthetic resin members are used for the laminated structure, then the weight is reduced, but the strength is inferior and timewise changes occur easily
Solution Approach 1:
The patent employs composite materials by combining multiple aluminum alloy materials with different properties in a laminated structure. Each block member is made from appropriately selected aluminum alloys (such as A6061 for flow passage members and A2017 for structural members) to achieve optimal balance between weight reduction and structural strength. This composite approach allows the structure to maintain lightweight characteristics while achieving superior strength and durability through the synergistic combination of different metal materials.
3Ease of manufacture
If members are joined by conventional methods, then the joining process is simple, but the flow passages become deformed and fluid pressure control becomes difficult
Solution Approach 1:
The patent maintains joining process simplicity while ensuring fluid pressure control reliability through material parameter optimization. By selecting aluminum alloys with appropriate elastic constants (lower for flow passage members, higher for adjacent members) and controlling joining conditions (temperature, pressure, time), the process achieves both ease of manufacture and reliable fluid pressure control without requiring complex joining procedures.
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 configuration minimizes deformation of fluid flow passages, maintains high strength and precision, and ensures excellent durability, allowing for reliable operation of fluid pressure devices under desired conditions.
Implementation Method 1
the elastic constant of the intermediate member is set to be greater than the elastic constants of the first block member and the second block member
Implementation Method 2
the members are each joined by diffusion bonding or welding
Data Source
AI summary
A laminated structure is formed by stacking a first block member, an intermediate member, and a second block member together in this order, and then mutually joining each of the members. Further, by setting the elastic constant of the intermediate member to be greater than the elastic constants of the first block member and the second block member, deformation of grooves, which are formed in the first block member, is minimized.