Tubular Core Warhead Insert for Large-Diameter Core Formation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shaped charge warheads with tubular core-generating charges face issues such as a long and delicate mandrel attachment, leading to separation or misalignment during operational use, making them unsuitable for effective integration in ammunition, and previous solutions fail to reliably form tubular cores with large diameters.
Innovation Solution
A shaped charge warhead design featuring a concave coating with an insert that completely passes through the coating and penetrates the explosive charge, ensuring a tubular profile, where the insert's rear part is positioned at a distance from the casing bottom, and its length outside the load is greater than half the caliber, providing a robust structure for operational integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a long mandrel is used to form the tubular core, then the mandrel can extend through the coating to shape the core, but the mandrel becomes difficult to attach and may separate or misalign during operational use
Solution Approach 1:
The mandrel is divided into two distinct parts: a first portion that extends through the coating and a second portion that remains within the explosive charge. This segmentation allows each part to serve its specific function independently - the first portion shapes the tubular core while the second portion provides stable positioning and attachment within the charge, eliminating the reliability issues of long single-piece mandrels
Solution Approach 2:
The two-part mandrel structure nests the functional portion (first portion) within the structural portion (second portion). The first portion is positioned within the explosive charge while extending through the coating, creating a nested configuration where the shaping function is contained within the stabilizing structure, achieving both core formation precision and attachment reliability
2Manufacturing precision
If the insert completely passes through the coating and penetrates into the explosive charge, then the tubular core formation is improved, but the axial bulk of the warhead increases
Solution Approach 1:
The mandrel exhibits local quality variations along its length - the first portion has specific dimensional characteristics for shaping the tubular core where it interacts with the coating, while the second portion has different characteristics optimized for positioning within the explosive charge. This localized differentiation allows the insert to achieve its dual function without requiring excessive overall length
Solution Approach 2:
The mandrel extends further into the explosive charge than the minimum required for simple support - the second portion is positioned at a distance from the bottom of the charge envelope. This partial excessive action ensures stable attachment and proper positioning while the overall length is carefully controlled to minimize axial bulk, achieving a balance between positioning stability and compactness
3Reliability
If the rear part of the insert is positioned at a distance from the bottom of the casing, then the explosive initiation is not disturbed, but the structure becomes more complex
Solution Approach 1:
The explosive charge itself serves as the positioning and securing mechanism for the second portion of the mandrel. By positioning the rear part within the explosive material at a distance from the bottom, the charge's own structure and initiation process provide the necessary support and alignment, eliminating the need for additional complex positioning fixtures or attachment mechanisms
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 design achieves a reduced axial bulk with a robust structure, allowing reliable formation of tubular cores with large diameters, enhancing perforation capabilities without initiating reactive protection and ensuring stable core formation despite operational vibrations.
Implementation Method 1
When the explosive is detonated, this coating is set in motion by the incident pressure wave
Implementation Method 2
the incident pressure wave
Data Source
AI summary
The military head (1) charged with a concave coating (2) applied against an explosive charge (3) disposed in an envelope (4) having a bottom, comprises an initiation unit, a cylindrical steel insert (7) disposed axially with respect to the coating, a rear containment block having a cylindrical external surface adjusted with an internal housing of the envelope, and an internal conical bore. The insert is intended to give a tubular profile to a core generated by the coating during the initiation of the explosive charge. The military head (1) charged with a concave coating (2) applied against an explosive charge (3) disposed in an envelope (4) having a bottom, comprises an initiation unit, a cylindrical steel insert (7) disposed axially with respect to the coating, a rear containment block having a cylindrical external surface adjusted with an internal housing of the envelope, and an internal conical bore. The insert is intended to give a tubular profile to a core generated by the coating during the initiation of the explosive charge, and completely extends the coating and penetrates inside the explosive charge. The insert comprises a conical rear portion located at a distance from the bottom of the envelope, where the distance is greater than or equal to a diameter of the insert. A conicity of the internal conical bore is same as the conical rear portion of the insert. A length of the insert is located outside of the charge, where the length is >=0.5 times a size of the charge. The conical rear portion of the insert penetrates inside the explosive charge.