Beveled Backing Strip for Bullet Trap Plate Clamping
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Solution Overview
Problem
Existing bullet trap systems face challenges with secure plate engagement due to weakened welds, plate damage, and loose backing washers, leading to potential escape of bullet fragments and lead dust.
Innovation Solution
A beveled backing strip with elongate slots and angled arms is used to clamp plates together, eliminating the need for backing washers and shims, providing a more secure and modular solution for bullet trap construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plates are welded together to form a secure containment structure, then the structural integrity and security of the bullet trap is improved, but the areas at which the plates are welded together are weakened by the welding process
Solution Approach 1:
The backing strip is divided into multiple arms (first arm, second arm, third arm) that can independently engage with different plates. This segmentation allows each arm to distribute clamping forces separately, avoiding concentration of stress at single weld points while maintaining overall structural integrity through the distributed clamping system.
2Reliability
If a plate gets damaged, the plate must be cut out and a new piece welded in its place, but this process is time-consuming and complex
Solution Approach 1:
The clamping system uses discrete backing strips with multiple arms that can be independently removed and replaced. When a plate is damaged, only the specific backing strip arm engaged with that plate needs to be accessed and adjusted, rather than replacing entire welded assemblies. This modular approach simplifies repair procedures.
Solution Approach 2:
The elongate slots in the backing strip arms provide adjustable positioning capability. During repair, the slots allow for repositioning of clamping points to accommodate new plates or adjusted plate configurations, enabling flexible adaptation during the repair process without requiring precise pre-drilled hole patterns.
3Ease of manufacture
If backing washers and shims are used to clamp plates together, then the clamping system can be assembled, but the backing washers can become loose over time due to repeated vibrations
Solution Approach 1:
The backing strip arms feature a curved or angled geometry that provides mechanical advantage and self-tightening characteristics. The curved configuration allows the arms to maintain constant contact with the plates under vibration, preventing the loosening issue experienced with flat backing washers while preserving assembly simplicity.
Solution Approach 2:
The system combines the backing strip (providing structural support), elongate slots (providing adjustment capability), and clamping arms (providing mechanical advantage) into an integrated composite structure. This composite design eliminates the need for separate backing washers and shims while maintaining assembly ease and improving clamping stability under vibration.
4Adaptability or versatility
If three plates come together at a joint, then the bullet trap mouth can flare outwardly to reduce miss risk, but the joint becomes more complex and difficult to secure
Solution Approach 1:
The backing strip system uses multiple independent arms (first arm for one plate, second arm for another plate, third arm for a third plate) that can independently engage with each plate at the joint. This segmentation allows the joint to accommodate three plates meeting at different angles without requiring a single complex fastening mechanism, thereby enabling mouth flare geometry while managing joint complexity.
Solution Approach 2:
The backing strip with multiple arms serves multiple functions simultaneously: it provides clamping force for each individual plate, maintains joint alignment, and accommodates the angular relationships required for mouth flaring. This multi-functional design reduces the need for separate components for each function, thereby managing overall system complexity despite the three-plate joint configuration.
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 beveled backing strip enhances the clamping force and stability of the plates, reducing the risk of plate loosening and fragment escape, while allowing for easy replacement of damaged plates, thus improving the overall security and durability of the bullet trap.
Implementation Method 1
The beveled backing strip enhances the clamping force and stability of the plates
Data Source
AI summary
A joint plate mounting mechanism includes a backing strip with a first arm, a second arm and a middle portion disposed between the first arm and the second arm.