Slide Part Surface Structure for Adhesion Prevention
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Solution Overview
Problem
Existing slide parts used in press working and other processing methods face issues with adhesion of the workpiece to the mold surface, leading to wear and dimensional errors due to inadequate lubrication and friction, despite previous techniques forming micro pools on the surface.
Innovation Solution
A surface structure with periodic structures of varying sizes, including a first periodic structure with a period of 10 nm to 100 nm, a second periodic structure with a period of 100 nm to 1000 nm, and a third periodic structure with a period of 1000 nm to 10000 nm, formed in a specific arrangement on the slide part, along with the use of a gas cluster ion beam to create a ripple structure orthogonal to the slide direction, which enhances lubrication and prevents adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If micro pools are formed on the surface to store lubricant, then lubrication is improved and friction is reduced, but adhesion of the workpiece to the mold surface occurs leading to wear and dimensional errors
Solution Approach 1:
The surface is segmented into multiple periodic structures with different periods (10-100 nm, 100-1000 nm, 1000-10000 nm) that work together to prevent adhesion while maintaining lubrication. The segmented periodic structures create a complex surface topology that prevents workpiece adhesion compared to simple micro pools.
Solution Approach 2:
Different regions of the surface have different periodic structures with specific periods and depths optimized for their local function. The first periodic structure (10-100 nm) prevents adhesion at the molecular level, while the second (100-1000 nm) and third (1000-10000 nm) structures provide lubricant storage and distribution, creating local quality variations that solve both lubrication and adhesion problems.
2Reliability
If surface roughness is increased by acid corrosion, shot peening, or sand blast to store lubricant, then lubrication is improved, but the surface structure becomes irregular and less effective at preventing adhesion
Solution Approach 1:
Instead of irregular surface roughness from conventional methods, the invention uses periodic structures with regular intervals and controlled dimensions. The periodic arrangement of structures with periods of 10-100 nm, 100-1000 nm, and 1000-10000 nm provides predictable lubricant storage while maintaining precise control over surface topology to prevent adhesion.
Solution Approach 2:
The invention changes the parameters of surface structures from irregular roughness to controlled periodic patterns with specific period ranges (10-100 nm, 100-1000 nm, 1000-10000 nm) and depth ratios. This parameter control allows simultaneous optimization of lubricant storage capacity and adhesion prevention, which irregular surfaces cannot achieve.
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 described surface structure effectively prevents adhesion of the workpiece to the slide part by forming a continuous fluid lubrication film, extending the life and maintenance period of the slide part, and reducing wear and dimensional errors.
Implementation Method 1
a method of processing a surface of a slide part with a gas cluster ion beam
Implementation Method 2
The lubricant applied to the workpiece or mold before processing is stored in the depressions on the surface (storage effect)
Data Source
AI summary
A slide part has a surface structure in which there are at least two periodic structures among a first periodic structure with a period of 10 nm to 100 nm inclusive and a depth of 5 nm to 50 nm inclusive, a second periodic structure with a period of 100 nm to 1000 nm inclusive and a depth of 20 nm to 500 nm inclusive, and a third periodic structure with a period of 1000 nm to 10000 nm inclusive and a depth of 100 nm to 3000 nm inclusive, in which one of the at least two periodic structures is formed on the other periodic structure.