Shell with a shell body and a process for the preparation of radially protruding guiding means on a shell body

• US 6,600,126 B2
• Filed: 03/15/2001
• Issued: 07/29/2003
• Est. Priority Date: 03/16/2000
• Status: Expired due to Fees

• Current Assignee: RUAG Components
• Original Assignee: RUAG Components
• Inventors: Schupfer, Matthias, Steinhoff, Kurt
• Primary Examiner(s): Shaw, Clifford C.
• Application Number:
  US09/809,750
• Publication Number:
  US 20020002926A1
• Time in Patent Office: 866 Days
• Field of Search: 219/76.14, 219/137.R, 219/137.WM, 219/76.1, 102/524, 102/526, 228/119
• US Class Current: 219/76.14
• CPC Class Codes: F42B 12/76 of the casing
• CPC Class Codes: F42B 14/02 Driving bands; Rotating bands F42B14/04 takes precedence

Abstract

Guiding means being arranged on a surface area of a shell are made of high purity nickel by build-up welding. This avoids a drag-in of copper into a gun barrel foreseen for the launch of a shell. A production of the guiding means in the build-up welding process allows a reliable fixing of the guiding means directly onto the shell body.

Claims

1. A process for the preparation of radially protruding guiding means on a shell body of a shell to be led in a gun barrel, comprising the steps of applying a single layer of a nickel-containing layer onto a basic body through a build-up welding process, followed by exposing the basic body to a protecting gas atmosphere at a temperature of 800 degrees C. to 850 degrees C. for one to three hours.

2. The process according claim 1 wherein the basic body is subsequently cooled to room temperature and then exposed to a protecting gas atmosphere for three to six hours at a temperature of 480 degrees C.

3. The process according to claim 1 wherein the nickel-containing layer, following the build-up welding step, is metal-cutting worked to preset dimensions.

4. The process according to claim 1 wherein the step of applying the nickel-containing layer is followed by cutting slots longitudinally in the nickel-containing layer.

5. The process according to claim 1 wherein the build-up welding process takes place in sections extending longitudinally to the shell body.

6. The process according to claim 1 wherein the build-up welding process includes the application of radially overlaid weld seams to the shell body in longitudinal directions.

7. The process according to claim 6 wherein the weld seams are applied in a longitudinally arched orientation.

8. The process according to claim 7 characterized in that the weld seams are applied by a pendulum welder.

9. The process according to claim 1 wherein the shell body is intensively cooled during the welding process.

10. The process according to claim 9 wherein the inner side of the shell body is connected to a water supply during the welding process.

11. A shell body having radially protruding guiding means formed by the process of claim 1.

12. A shell body according to claim 11, characterized in that the material of the basic body is a tempered steel 42CrMo4 or a maraging steel.

13. A shell body according to claim 11 or 12 characterized in that the guiding means contain more than 90% nickel.