Projectile Snap-Together Interface With 75-Degree Pressure Angle
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Solution Overview
Problem
Existing projectiles require tools and controlled environments for assembly and payload loading, making them difficult to manufacture and deploy efficiently.
Innovation Solution
A frangible projectile design featuring snap-together sections with a pressure angle of at least 75 degrees, allowing for tool-less assembly and controlled fracture characteristics to direct a payload upon impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional projectile assembly methods are used, then manufacturing precision and control are improved, but device complexity and manufacturing difficulty increase due to required tools and controlled environments
Solution Approach 1:
The projectile shell is divided into multiple separable sections that can be assembled through snap-together interfaces. This segmentation allows each section to be manufactured independently with standard tolerances, then quickly assembled without tools or controlled environments, resolving the contradiction between precision and ease of manufacture.
Solution Approach 2:
The snap-together interface is designed with a pressure angle of at least 75 degrees, creating a self-locking mechanism that automatically secures sections together without requiring external tools, fixtures, or controlled assembly environments. The interface itself provides the necessary alignment and securing functions.
2Productivity
If a frangible design with snap-together sections is used, then ease of manufacture and assembly speed are improved, but structural strength may be compromised
Solution Approach 1:
The shell sections are designed with differentiated local properties: the main body sections maintain full structural strength for flight and impact, while the snap-together interfaces are intentionally designed as controlled weakness points. The pressure angle geometry creates a localized stress concentration that allows easy assembly but maintains overall structural integrity during normal operation.
Solution Approach 2:
The snap-together interface utilizes a pressure angle of at least 75 degrees, creating a curved, self-locking geometry that distributes loads effectively during assembly while maintaining structural strength during flight. The curved interface geometry provides both ease of assembly and adequate structural performance.
3Ease of operation
If a high pressure angle of at least 75 degrees is used in the snap-together interface, then ease of assembly is improved, but manufacturing precision requirements increase
Solution Approach 1:
The pressure angle parameter is optimized to be at least 75 degrees, which creates a self-locking geometry that tolerates larger dimensional variations. This high angle transforms the interface from requiring precise mating surfaces to requiring only adequate clearance and alignment, significantly reducing manufacturing precision requirements while maintaining ease of assembly.
Data Source
AI summary
A projectile including a first section and a second section. The first section and the second section being snapped together at a snap together interface having a pressure angle of at least 75 degrees. The first section and the second section forming at least one cavity therebetween, with a payload contained in the cavity.