Aluminum Alloy Wheel Nut with Three-Layer Surface Treatment
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Solution Overview
Problem
Conventional steel wheel nuts are prone to corrosion and cracking due to their two-piece structure and surface damage from tool rotation, leading to increased corrosion rates and aesthetic issues.
Innovation Solution
A wheel nut manufactured from an aluminum alloy using a three-layer surface treatment process: anodizing, vacuum deposition, and powder paint, forming a single structural piece with enhanced corrosion resistance and reduced weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional steel materials with two-piece structure are used, then manufacturing process is simple, but corrosion resistance is poor and cracking occurs at welded portions
Solution Approach 1:
The patent merges the cap and body into a single-integrated structure made from one piece of aluminum alloy material, eliminating the welded joint that causes cracking and corrosion in conventional two-piece steel wheel nuts. This integration resolves the technical contradiction by improving reliability through corrosion resistance while maintaining structural integrity without requiring complex welding processes.
Solution Approach 2:
The patent uses aluminum alloy material with specific composition (Al-Fe-Si-Mg-Cu-Mn-Zn) to create a composite material structure that provides both the mechanical strength needed for wheel nuts and improved corrosion resistance compared to conventional steel. The multi-element alloy composition creates a material that resists corrosion while maintaining structural integrity.
2Illumination intensity
If surface treatment is applied to improve appearance, then aesthetic appearance is enhanced, but surface damage from tool rotation causes corrosion
Solution Approach 1:
The patent applies a three-layer surface treatment system (anodizing layer, vacuum deposition layer, and powder paint layer) on the aluminum alloy wheel nut. This composite coating structure provides both aesthetic appearance enhancement and improved surface durability, protecting against corrosion from tool rotation damage while maintaining visual appeal.
3Strength
If steel material is used, then strength is sufficient, but weight is high
Solution Approach 1:
The patent changes the material parameter from steel to aluminum alloy, which has lower density and weight but can achieve sufficient mechanical strength through optimized alloy composition and heat treatment processes. The specific aluminum alloy formulation (Al-Fe-Si-Mg-Cu-Mn-Zn) and thermal processing parameters are selected to maintain the strength required for wheel nut applications while significantly reducing weight.
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 solution provides improved corrosion resistance, surface hardness, and aesthetic appeal while reducing manufacturing processes and environmental impact, and decreasing the overall weight of the wheel nut compared to conventional steel materials.
Implementation Method 1
annealing an aluminum (Al) alloy material and preheating the annealed Al alloy material
Implementation Method 2
forging the preheated Al alloy material, to form a wheel nut
Implementation Method 3
performing primary coating of the wheel nut via anodizing
Implementation Method 4
performing secondary coating of the wheel nut, which was subjected to primary coating, via vacuum deposition
Implementation Method 5
performing tertiary coating of the wheel nut, which was subjected to secondary coating, via surface treatment using a powder paint
Data Source
AI summary
Disclosed herein is a method of manufacturing a wheel nut. The method includes annealing an aluminum (Al) alloy material and preheating the annealed Al alloy material. The Al alloy material is also forged to form a wheel nut. Furthermore, the method includes performing an anodizing treatment to form a primary coating on the wheel nut and performing a vacuum deposition to form a secondary coating on the wheel nut. In addition, the method includes performing a surface treatment using powder paint to form a tertiary coating on the wheel nut.