Arrangement for production of explosively formed projectiles

• US 4,982,667 A
• Filed: 10/28/1988
• Issued: 01/08/1991
• Est. Priority Date: 08/19/1983
• Status: Expired due to Fees

• Current Assignee: Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forsching E.V.
• Original Assignee: Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forsching E.V.
• Inventors: Weimann, Klaus
• Primary Examiner(s): Brown, David H.
• Application Number:
  US07/268,453
• Time in Patent Office: 802 Days
• Field of Search: 102/305-310, 102/475, 102/476, 102/501, 102/701
• US Class Current: 102/476
• CPC Class Codes: F42B 1/02 Shaped or hollow charges blasting cartridges with cavities in the charge F42B3/08; oil winning using shaped-charge perforators E21B43/116
• CPC Class Codes: F42B 1/028 characterised by the form of the liner
• CPC Class Codes: Y10S 102/701 Charge wave forming

Abstract

An arrangement for production of explosively formed projectiles consists of casing with explosive contents, a fuse arranged on the base side and a metal insert which covers the explosive contents on the head side, in which case the projectile acquires wing-like symmetrical folds on its tail by means of the following. The insert and/or the explosive contents and/or the fuse in their outside area and/or the casing on its jacket features at least three inhomogeneities arranged at a distance from the axis of the casing in a symmetrical manner around the circumference such that in the circumferential area of the insert varied. Acceleration is achieved according to the configuration of the inhomogeneities or the impact time of the shock wave or its impact energy is different.

Claims

1. A device for producing an explosive formed projectile including a casing filled with an explosive charge, ignition means on a base side of said casing, and a metal insert covering the explosive charge on a head side of said casing, the device including at least three means arranged along a circle and at a distance from a longitudinal axis of the casing for causing a circumferential area of the casing to be subjected to different accelerations when a shock wave of the ignited charge reaches the insert, characterized in that said means for causing are provided in at least one of the insert, the explosive charge, and the ignition means on a circumferential circle in at least one of an external area thereof, and the casing on an external surface thereof so that one of the impact point of time and the impact energy of the shock wave differ in a circumferential area of the casing.

2. A device according to claim 1, characterized in that said means for causing includes a varying of explosive concentration of the explosive charge arranged symmetrically in circumferential area of the explosive charge.

3. A device according to claim 1, characterized in that the ignition means comprises at least one of ignition points of lower ignition energy and delayed ignition time arranged symmetrically in the circumferential area.

4. A device according to claim 1, characterized in that said means for causing comprises a casing wall thickness varying in a symmetrical configuration.

5. A device according to claim 1, characterized in that the casing comprises a cylindrical inner side and a multiple sided outer side.

6. A device according to claim 1, characterized in that at least one of the means for causing is asymmetrically disposed.

7. A device according to claim 1, characterized in that the insert is substantially disk shaped, and wherein said means for causing includes substantially radially extending deformations provided in a circumferential area of the insert.

8. A device according to claim 7, characterized in that the deformations include a wave profile having a relatively low wave height.