AU2015326647B2

AU2015326647B2 - Cartridge casing

Info

Publication number: AU2015326647B2
Application number: AU2015326647A
Authority: AU
Inventors: James Edward Baxter; Nathan William ROWE; Joshua Matthew STUBBS
Original assignee: BAE Systems PLC
Current assignee: BAE Systems PLC
Priority date: 2014-10-01
Filing date: 2015-09-25
Publication date: 2018-01-18
Anticipated expiration: 2035-09-25
Also published as: GB2530908A; BR112017006517A2; CA2963036A1; US20180209769A2; US20170299351A1; WO2016051139A1; GB2530908B; GB201516961D0; GB201417311D0; AU2015326647A1; IL251399B; EP3201558A1

Abstract

A cartridge casing (30) comprises a casing tube (32) and a head cap (36). The casing tube (32) bounds at least part of the head cap (36). The head cap (36) is being fixed relative to the casing tube (32) by a welding process, e.g. at a circumference located at A or B.

Description

The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.

- 132015326647 21 Nov 2017

Claims

1 A cartridge casing comprising :

a casing tube having a first end;

wherein the tube bounds at least part of a head cap entered into its first end; and the head cap being fixed relative to the tube by a bond provided by a laser welding process around an internal circumference of the casing tube at an interface between the casing tube and head cap;

wherein :

the casing tube is substantially cylindrical and has an internal diameter at the first end which receives the head cap; and the head cap has an external diameter at least part way along its outer periphery sized such that it fits within the first end of the casing tube; and the relative dimensions of the internal diameter at the first end of the casing tube and the external diameter of corresponding region of the head cap is such when the head cap is located in the casing tube they form an interference fit with one another.

2 A cartridge casing as claimed in claim 1 wherein the casing tube further comprises a corrugation towards the first end of the casing tube which extends at least part way around the circumference of the casing tube.

3 A cartridge casing as claimed in claim 2 wherein the corrugation is provided spaced apart from the first end of the casing tube such that the inner

- 142015326647 21 Nov 2017 circumference of the first end is substantially constant in a region between the first end and the corrugation.

4 A cartridge casing as claimed in claim 3 wherein, when assembled, the head cap extends along the inside of the casing tube towards the corrugation.

5 A cartridge casing as claimed in claim 4 wherein the external diameter of the outer periphery of the head cap that is configured to fit within the first end of the casing tube terminates in an outwardly protruding shoulder, and when the casing tube and head cap are assembled, the casing tube extends towards the outwardly protruding shoulder.

6 A cartridge comprising a projectile mounted to a cartridge casing as claimed in any one of claims 1 to 5.

7 A method of manufacturing a cartridge casing as claimed in any one of claims 1 to 6 comprising the steps of:

forming a casing tube by a first process;

forming a head cap by a second process;

joining the casing tube and head cap by a third process comprising the steps of:

entering the head cap into the first end of the casing tube; and

- 152015326647 21 Nov 2017 bonding the head cap and casing tube together using a laser welding process around an internal circumference of the casing tube at an interface between the casing tube and head cap.

8 A method claimed in claim 7 wherein the first process comprises the steps of:

providing a material sheet; and deforming the material sheet into a substantially cylindrical tube.

9 A method as claimed in claim 8 wherein :

the material sheet is deformed such that the cylindrical tube is open at a first end and closed at a second end opposite to the first end; and removing the closed end of the cylinder such that the tube is open at both ends.

10 A method as claimed in claim 9 wherein the casing tube and head cap are welded to one another by applying a welding process to the external surface of the casing tube, radially outward of where the casing tube is in contact with the external diameter of the head cap.

11 A method as claimed in claim 7 wherein the casing tube and head cap are welded to one another by applying a welding process to an interface between the casing tube and head cap on the external surface of the casing tube and head cap.

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