Method for forming fragment wrap of a fragmentation structure

Patent metadata

Field	Value
Publication number	US-2016377398-A1
Application number	US-201615194685-A
Country	US
Kind code	A1
Filing date	Jun 28, 2016
Priority date	Jun 28, 2015
Publication date	Dec 29, 2016
Grant date	—

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.

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 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.

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

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

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

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

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

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

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

12 . The method as recited in claim 1 , wherein the applying of the at least one flexible fragment strand includes winding the flexible fragment strand around the core piece.

13 . The method of claim 12 , further comprising applying a plurality of flexible fragment strands around the core piece simultaneously.

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

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

16 . 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, and
combining the discrete fragments and a flexible media, the flexible media holding the discrete fragments together in the pattern.

17 . The method as recited in claim 16 , wherein the combining includes applying the flexible media to the discrete fragments.

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

19 . The method as recited in claim 18 , wherein the arranging includes arranging the discrete fragments into multiple columns.

20 . The method as recited in claim 16 , 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

• Y10T29/4981

  Utilizing transitory attached element or associated separate material · CPC title

• B21D53/00

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

• 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

• 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