Segmented Compound Bow Riser Design for Material Savings
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Solution Overview
Problem
Conventional compound bow risers made from aluminum alloy through CNC machining or casting are wasteful in material and costly due to varying thicknesses and complex mold requirements, leading to increased manufacturing costs.
Innovation Solution
A compound bow riser design comprising individually manufactured lower, end, and connection sections with uniform thickness, utilizing milling and welding techniques to minimize material waste and ensure strong connections through pin and hole engagement and welding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If CNC machining is used to manufacture the riser, then the strength and precision are improved, but material waste and manufacturing cost increase
Solution Approach 1:
The riser is divided into multiple separate sections (upper section, lower section, protrusion section) that are manufactured individually and then assembled together. This segmentation allows each section to be manufactured with uniform thickness using cost-effective processes, eliminating the material waste associated with CNC machining of complex varying-thickness geometries while maintaining manufacturing precision through controlled assembly with定位 holes and pins.
2Loss of substance
If casting is used to manufacture the riser, then material usage is improved, but mold cost and device complexity increase
Solution Approach 1:
The riser is segmented into multiple sections with uniform thickness that can be manufactured using simple, cost-effective processes. By avoiding complex varying-thickness geometries, the need for expensive multi-cavity molds is eliminated. Each section can be manufactured with straightforward casting or forming processes, significantly reducing mold complexity and cost while maintaining material usage efficiency.
3Strength
If varying thickness is used in the riser sections, then the structural strength is improved, but manufacturing cost and complexity increase
Solution Approach 1:
Instead of varying the thickness of individual sections, the patent applies local quality through the assembly structure itself. The protrusion section with定位 holes and pins provides localized strengthening at critical connection points between sections. This approach maintains uniform thickness throughout each manufactured section, greatly simplifying the manufacturing process while still achieving the necessary structural strength through the reinforced assembly joints.
4Reliability
If the riser is manufactured as a single piece, then the structural integrity is improved, but material waste and manufacturing cost increase
Solution Approach 1:
The riser is divided into multiple sections that are assembled together using定位 holes and pins with welding. This segmentation allows each section to be manufactured with uniform thickness, eliminating the material waste associated with manufacturing a single-piece varying-thickness riser. The structural integrity is maintained through the reinforced assembly joints, which create strong connections between sections while allowing for more efficient material usage in each individual component.
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 design achieves material savings while maintaining strength by allowing for even thickness across components and efficient welding, reducing manufacturing costs and material usage.
Implementation Method 1
The first connection portion is further welded to the first connection end, and the second connection portion is further welded to the second connection end
Data Source
AI summary
A riser of a compound bow includes a lower section and an upper section. The upper section has an end section and a connection section which is connected to the lower section by engagement of pins and pin holes of the two respective connection ends. The connection is further reinforced by way of welding. The end section is further connected with the connection section by engagement of pins and pin holes of the two respective connection ends. The connection is further reinforced by way of welding. The riser is strong and saves material.