Firearm Case Assembly via Pre-Formed Anchoring Tooth
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Solution Overview
Problem
The assembly of firearm cases is challenging due to the need for precise mechanical stress to deform components, which can lead to disassembly issues or weakening of the structure if not controlled correctly, requiring complex and high-powered machinery.
Innovation Solution
A method involving a pre-shaped reinforcing element with an anchoring tooth, which is axially compressed to secure the pipe within the base, reducing the need for excessive deformation and simplifying the assembly process by eliminating the need for folding operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high mechanical stress is applied to deform the reinforcing element and pipe inside the collar, then the anchoring tooth is formed to prevent disassembly, but the pipe may be excessively flattened and weakened
Solution Approach 1:
The reinforcing element is pre-shaped with an anchoring tooth projection before assembly. This preliminary formation of the anchoring feature eliminates the need for high-stress deformation during assembly, preventing pipe flattening while ensuring reliable anchoring in the collar.
2Manufacturing precision
If complex and high-powered machines are used to control compression forces, then precise deformation is achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The anchoring tooth is pre-formed on the reinforcing element before assembly. This eliminates the need for complex high-powered compression machines during assembly, as the anchoring feature is already prepared in advance, simplifying the manufacturing equipment requirements.
Solution Approach 2:
The invention replaces the complex mechanical compression system with a simpler assembly process where the pre-formed anchoring tooth is inserted into the collar. The anchoring is achieved through the geometric interlocking of the pre-formed tooth with the collar space, rather than through high-stress plastic deformation.
3Ease of manufacture
If the reinforcing element is made rigid and pre-shaped with anchoring tooth, then no compression stress is needed during assembly, but the base must be folded around the tooth requiring complex machines
Solution Approach 1:
Instead of folding the base around the anchoring tooth as in prior art, the invention inverts the approach: the anchoring tooth is formed on the reinforcing element, and the pipe is inserted into the base with the tooth engaging the collar. This eliminates the need for base folding operations and associated complex machinery.
4Reliability
If the pipe end is folded to form an annular edge, then the pipe can be anchored in the collar, but the folding operation adds process complexity
Solution Approach 1:
The anchoring functionality is preliminarily prepared by forming the anchoring tooth on the reinforcing element before assembly. This eliminates the need for folding the pipe end during assembly, simplifying the manufacturing process while maintaining reliable anchoring through the pre-formed tooth-c collar engagement.
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
This method ensures a safe and reliable assembly with reduced mechanical stress, simplifying the production process and eliminating the risk of disassembly, while allowing for various geometrical shapes optimized for firing functionality.
Implementation Method 1
axially compressing the reinforcing element (6) in such a way that by deforming plastically, it expands radially until securing the pipe (2) against the inner side wall (8) of the base (7)
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
Described is a method for making cases for firearms of the type comprising a substantially cylindrical rigid pipe (2), a plastically deformable reinforcing element (6) pre-shaped with a substantially cylindrical side wall (12) and with a bottom wall (13) along whose perimeter edge (14) the side wall (12) of the reinforcing element (6) is flared outwards in such a way as to form a side anchoring tooth (15), and a substantially cylindrical rigid base (7), which has a tubular side wall (8) and a bottom wall (9) along whose perimeter edge (10) the side wall (8) is flared outwards in such a way as to form a collar (11) which has internally a seat undercut; the method comprises inserting the reinforcing element (6) in the pipe (2), and both in the base (7) until they make contact with the bottom wall (9) of the base(7); and axially compressing the reinforcing element (6) in such a way that, by deforming plastically, it expands radially until securing the pipe (2) against the inner side wall (8) of the base (7), and until inserting the anchoring tooth (15) inside the collar (11) with the consequent radial deformation of an end edge (5) of the pipe (2), which is thus secured, in flared configuration, between the anchoring tooth (15) and the collar (11).