Method for forming fragment wrap of a fragmentation structure

Patent metadata

Field	Value
Publication number	US-10184767-B2
Application number	US-201615194685-A
Country	US
Kind code	B2
Filing date	Jun 28, 2016
Priority date	Jun 28, 2015
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

A method includes forming at least one fragment wrap of a fragmentation structure by providing at least one flexible fragment strand that includes a plurality of discrete fragments held together in a pattern by a flexible media, and applying the at least one flexible fragment strand around a core piece to form the at least one fragment wrap.

First claim

What is claimed is:

1. A method comprising:
forming at least one fragment wrap for a fragmentation structure by, providing at least one flexible fragment strand that includes a plurality of discrete fragments held together in a pattern by a flexible media, and applying the at least one flexible fragment strand around a core piece to form the at least one fragment wrap, wherein the applying the at least one flexible fragment strand includes applying a first flexible fragment strand around the core piece followed by applying a second flexible fragment strand on the first flexible fragment strand.

2. The method of claim 1 , wherein the fragment wrap partially covers the core piece.

3. The method of claim 1 , wherein the fragment wrap fully covers the core piece.

4. The method of claim 1 , wherein the second flexible fragment strand fits partially or fully congruently with the first flexible fragment strand.

5. The method as recited in claim 1 , wherein the flexible media encapsulates the fragments.

6. The method as recited in claim 1 , wherein the discrete fragments are bonded to the flexible media.

7. The method as recited in claim 1 , wherein the pa is a single file line arrangement of the discrete fragments.

8. The method as recited in claim 1 , wherein the pattern comprises multiple elongated rows of the discrete fragments.

9. The method as recited in claim 8 , wherein the pattern comprises multiple columns of the discrete fragments.

10. The method as recited in claim 1 , wherein the flexible media comprises a flexible sleeve that circumscribes the discrete fragments.

11. The method as recited in claim 1 , further comprising applying a potting material to the at least one fragment wrap.

12. The method as recited in claim 1 , herein the discrete fragments comprise dissimilar geometric shapes.

13. A method comprising:
forming at least one fragment wrap for a fragmentation structure by, providing at least one flexible fragment strand that includes a plurality of discrete fragments held together in a pattern by a flexible media, and applying the at least one flexible fragment strand around a core piece to form the at least one fragment wrap, wherein the applying of the at least one flexible fragment strand includes winding the flexible fragment strand around the core piece, further comprising applying a plurality of flexible fragment strands around the core piece simultaneously.

14. A method comprising: forming a fragment strand for at least one fragment wrap of a fragmentation structure by, arranging a plurality of discrete fragments in a pattern, wherein the pattern is a single file line, and combining the discrete fragments and a flexible media, wherein the media is a strip, the flexible media holding the discrete fragments together in the pattern, and winding the flexible media around a core piece to form the fragmentation structure.

15. The method as recited in claim 14 , wherein the combining includes applying the flexible media to the discrete fragments.

16. The method as recited in claim 14 , wherein the arranging includes arranging the discrete fragments into at least one elongated row.

17. The method as recited in claim 16 , wherein the arranging includes arranging the discrete fragments into multiple columns.

18. The method as recited in claim 14 , wherein the flexible media comprises a flexible sleeve, and the applying includes placing the discrete fragments into the flexible sleeve.

Assignees

• Aerojet Rocketdyne Inc

Inventors

• Daebelliehn Roderick
• Chastain Patrick A

Classifications

• F42B33/00 Primary

  Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor (F42B5/188 takes precedence; manufacturing processes for hollow charges F42B1/036; manufacture of blasting cartridge initiators F42B3/195) · CPC title

• F42B12/26

  the projectile wall being formed by a spirally-wound element · CPC title

• B21D53/00

  Making other particular articles (making wire fabrics B21F; making chains or chain parts B21L) · CPC title

• Y10T29/4981

  Utilizing transitory attached element or associated separate material · CPC title

• F42B12/32

  the hull or case comprising a plurality of discrete bodies, e.g. steel balls, embedded therein {or disposed around the explosive charge} · CPC title