Integrated Aluminum Alloy Bicycle Front Fork Manufacturing
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Solution Overview
Problem
Conventional bicycle front fork manufacturing methods result in heavier products with weaker structural connections, higher costs, and safety concerns due to vibration, as they involve assembly of separate components through adhesion, welding, or screw fastening.
Innovation Solution
A method involving extrusion and forging of aluminum alloy substrates to form integrated round bars, which are then drilled, shaped, and bent to create fork tubes and a stem without the need for bonding or fastening, reducing weight and improving structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate components (crown, stem, fork) are assembled through adhesion, welding, or screw fastening, then the manufacturing process is simpler for each component, but the final product has higher cost, heavier weight, and weaker structural connections
Solution Approach 1:
The patent merges the crown, stem, and fork components into a single integrated aluminum alloy front fork structure. This eliminates the need for separate components and their connections, thereby resolving the contradiction by achieving both manufacturing simplicity (through single-piece extrusion) and structural strength (through integrated design without weak connection points).
Solution Approach 2:
The integrated front fork is designed with functionally segmented regions (crown area, stem area, fork leg areas) that are differentiated by shape and structure but formed as one continuous piece. This allows each region to perform its specific function while maintaining overall structural integrity, resolving the contradiction between ease of manufacture and structural strength.
2Ease of manufacture
If separate components are assembled through adhesion, welding, or screw fastening, then each component can be manufactured independently, but the final product has heavier weight and higher cost
Solution Approach 1:
By combining all components into a single aluminum alloy extrusion, the patent eliminates the weight of multiple separate parts and their connection hardware. The integrated structure reduces overall weight while maintaining manufacturing efficiency through a single extrusion process, resolving the contradiction between ease of manufacture and weight reduction.
3Adaptability or versatility
If separate components are connected through adhesion, welding, or screw fastening, then manufacturing flexibility is maintained, but the connections are easy to get damaged and broken due to vibration on bumpy roads
Solution Approach 1:
The patent merges all components into one integrated structure that is extruded as a single piece. This eliminates connection points that would be vulnerable to vibration damage, thereby resolving the contradiction by achieving both manufacturing flexibility (through design variations in the extrusion process) and high reliability (through the absence of weak connection points).
Solution Approach 2:
The patent utilizes parameter changes in the extrusion process to create different structural features (varying cross-sections, wall thicknesses, and geometries) within the integrated front fork. This allows manufacturing flexibility to be maintained through process parameter adjustments while the integrated structure ensures vibration resistance, resolving the contradiction between adaptability and reliability.
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 method produces a lightweight, durable, and aesthetically pleasing integrated aluminum alloy bicycle front fork with enhanced structural strength and reduced production costs by eliminating the need for connections and processing steps.
Implementation Method 1
First aluminum alloy is extruded to form substrate having three rectangular bars arranged radially
Implementation Method 2
The blank is set into a mold for forging the three rectangular bars into three round bars
Implementation Method 3
the three round bars of the blank are extruded and extended
Data Source
AI summary
A method for manufacturing an integrated aluminum alloy bicycle front fork is revealed. Aluminum alloy is extruded to form substrate having three rectangular bars. Cut the substrate to get a blank. The blank is set into a mold for forging the three rectangular bars into three round bars. Then burr and waste material are removed. Next the blank is set into another mold for extruding the three round bars and the three round bars are punched to have guide holes. The round bars are drilled along the guide holes and penetrated to form round tubes. A tube opening of two round tubes is flattened and narrowed. Then the two round tubes are bent downward to form fork tubes of a front fork. The rest tube forms a front fork stem. Thereby an integrated light weighted front fork with good structural strength and beautiful appearance is produced.