Firearm Receiver Relief Recesses for Stress Distribution
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Solution Overview
Problem
Variations in stress and strain at the coupling locations between the barrel and receiver in firearms can lead to shortened functional life and accuracy issues.
Innovation Solution
The firearm receiver design incorporates relief recesses between barrel-tightening portions, allowing them to function independently and reducing material deflection, which in turn reduces stress and enhances clamping force consistency across the barrel-tightening portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional barrel-tightening portions are used without relief recesses, then the structure is simpler and manufacturing is easier, but stress variations and material deflection increase leading to reduced accuracy and functional life
Solution Approach 1:
The receiver body is segmented by introducing relief recesses that divide the material into distinct zones. These recesses create independent movement zones between barrel-tightening portions, allowing each portion to function independently without stress interference from adjacent portions. This segmentation reduces stress variations and improves both accuracy and functional life.
Solution Approach 2:
Relief recesses are strategically positioned at specific locations within the receiver body where stress concentrations occur. By modifying the local geometry only in these critical areas rather than the entire receiver, the design reduces stress risers locally while maintaining overall structural integrity and minimizing unnecessary complexity.
2Manufacturing precision
If relief recesses are added to allow independent movement of barrel-tightening portions, then stress variations are reduced and accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The relief recesses are pre-formed into the receiver body during manufacturing, creating predetermined zones of reduced material density before assembly. This preliminary action ensures that when barrel-tightening portions are installed, they can move independently from the start, guaranteeing consistent clamping force distribution without requiring additional adjustment or modification during assembly.
3Strength
If material density is increased at barrel-tightening portions to enhance strength, then clamping force is improved, but stress risers and spikes increase reducing functional life
Solution Approach 1:
Relief recesses are positioned adjacent to barrel-tightening portions to create a cushioning effect. These recesses absorb and distribute stress concentrations that would otherwise build up at the tightening portions during firing. By providing this stress-relief cushioning in advance, the design maintains strong clamping force while preventing stress risers that would reduce functional life.
Data Source
AI summary
A firearm includes a receiver body is provided herein having a plurality of barrel-tightening portions with at least one relief recess therebetween and relief recesses defined in the body on either proximal end. The relief recesses and barrel-tightening portions are sized to allow the barrel-tightening portions to be tightened and loosened independently of each other. A barrel assembly is removably coupled to the receiver body.