Ammunition Case Marking via Mechanical Scratching
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Solution Overview
Problem
Current methods for marking ammunition cartridges are expensive, limited in information capacity, and prone to damage or removal, especially when applied to the lateral surface, with existing techniques like laser engraving being costly and press stamping being unsuitable for lateral surfaces.
Innovation Solution
A method using scratching means to selectively incise the surface of the cartridge case, forming durable sub-marks that can encode complex information, allowing marking on any surface without deforming the case, using a device with actuators and harder materials like diamond or metal for precise and variable marking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If laser engraving techniques are used to mark the lateral surface of a cartridge case, then the mark can be applied to the lateral surface, but the equipment cost becomes very high and complex
Solution Approach 1:
The patent replaces complex laser engraving equipment with a simple mechanical scratching means that uses a harder material to incise marks directly onto the cartridge case. This mechanical approach eliminates the need for expensive laser equipment while achieving durable marks on the lateral surface.
Solution Approach 2:
The scratching means is a simple, inexpensive tool that can be easily replaced if needed. Instead of investing in expensive, complex laser engraving equipment, the patent uses a low-cost mechanical scratching tool that achieves the same marking function without the high equipment cost.
2Ease of manufacture
If press stamping is used to mark the lateral surface of a cartridge case, then the mark can be applied, but the case is easily damaged in its lateral or radial direction
Solution Approach 1:
The patent replaces the pressing mechanical system with a scratching mechanical system. Instead of applying compressive force that can deform or damage the thin-walled cartridge case, the scratching means uses a harder material to incise marks by removing minimal material, thereby preserving case integrity while achieving durable marking.
3Ease of manufacture
If printing techniques are used to mark the cartridge, then the mark can be applied to the surface, but the mark loses readability after firing and can be easily counterfeited
Solution Approach 1:
The patent replaces printing techniques with a mechanical scratching system that incises marks directly into the cartridge case surface. These incised marks are physically embedded in the case material, making them resistant to fading, wear, and counterfeiting, thereby significantly improving mark reliability and durability through the firing process.
Solution Approach 2:
The scratching means is made of a material harder than the cartridge case material, creating a permanent physical mark. This material property difference ensures the mark remains durable and readable even after firing, unlike printed marks that can degrade.
4Ease of manufacture
If press stamping is used to mark the bottom of a cartridge, then the mark can be applied, but the costs for producing press stamping dies are significant
Solution Approach 1:
The patent uses a simple, inexpensive scratching means that eliminates the need for expensive press stamping dies. The scratching tool is much cheaper to produce and can be easily replaced if needed, significantly reducing the tooling costs associated with traditional press stamping methods.
Solution Approach 2:
The patent replaces the complex press stamping die system with a simple mechanical scratching tool. This substitution eliminates the need for expensive die production while achieving effective marking, thereby reducing manufacturing costs and simplifying the marking process.
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
Enables efficient, durable, and reliable marking of ammunition cartridges with high information density on any surface, resistant to wear and removal, without the need for expensive equipment, allowing for effective identification and tracking.
Implementation Method 1
at least one scratching means which selectively incises a surface of the case, thereby forming the at least one sub-mark
Data Source
AI summary
The present invention describes a method of providing a mark to a case (13) of a cartridge (1) of ammunition. The mark comprises at least one sub-mark (12) and is suitable for identification or for tracking of the cartridge (1). According to the present invention, at least one scratching means (10) selectively incises a surface of the case (13), thereby forming the at least one sub-mark (12).