Adhesive Support Piece for Mortar Shell Orientation Stability
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Solution Overview
Problem
Mortar systems with movable bases face challenges in defending against attacks and engaging close-range targets due to the inability of heavy mortars to carry defensive facilities, and conventional shells are not suited for horizontal or downward firing, leading to instability and misfiring issues when the barrel is oriented in these directions.
Innovation Solution
A support piece with a rim flange is fastened to the shell using adhesive materials, such as glue, tape, or sticker tape, to securely hold the shell in place within the barrel, ensuring stability across various orientations and facilitating reliable firing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a friction-based clip bond is used to fasten the support piece to the shell, then the fastening method is simple and inexpensive, but the fastening force and stability vary due to tolerances in manufacturing
Solution Approach 1:
The patent replaces the mechanical friction-based clip bond with a chemical adhesive bond. The adhesive material is applied between the support piece and the shell tail, creating a more reliable and consistent fastening that is not affected by manufacturing tolerances in the same way mechanical friction connections are.
Solution Approach 2:
The patent changes the bonding mechanism from mechanical (friction) to chemical (adhesive). This parameter change in the fastening method provides more consistent and predictable fastening forces, eliminating the variability caused by dimensional tolerances in the mechanical connection approach.
2Adaptability or versatility
If conventional shells are used in horizontal or downward orientations, then the mortar can engage close-range targets, but the shell moves in the barrel causing misfiring or falling
Solution Approach 1:
The support piece is pre-fastened to the shell using adhesive material before the shell is loaded into the barrel. This preliminary action ensures that when the shell is fired in horizontal or downward orientations, the support piece remains securely attached, preventing the shell from moving or misfiring during the firing process.
Solution Approach 2:
The adhesive material acts as an intermediary between the support piece and the shell. This intermediary chemical bond ensures stable connection regardless of the barrel orientation, allowing the mortar to engage close-range targets in horizontal or downward positions without the shell moving or falling in the barrel.
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 adhesive-based fastening method provides a reliable and cost-effective solution for maintaining shell stability during handling, storage, and firing, allowing mortars to engage targets in horizontal or downward orientations without misfiring, while allowing the support piece to remain in the barrel after firing.
Implementation Method 1
the support piece is arranged in connection with the tail of the shell with one or more adhesive materials
Data Source
AI summary
An arrangement for supporting a shell (1) into the barrel of a breech-loading weapon, the arrangement comprising a support piece (4) provided with a rim flange (15) and to be fastened to the tail of the shell (1), the support piece being fastened in connection with the tail of the shell (1) with one or more adhesive materials. In addition, a method of fastening a support piece (4) to a shell (1).