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Method for Producing a Gun Cartridge Casing

a technology of gun cartridges and casings, applied in the field of new gun cartridge casings, can solve the problems of reducing the formation capability of cartridges with every step, requiring costly investments, laborious processes,

Inactive Publication Date: 2014-10-09
NEUGEBAUER HANS JURGEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention aims to provide a method for making a gun cartridge casing using a single transfer press. This method allows for more efficient and cost-effective production of gun cartridge casings.

Problems solved by technology

Further, the forming capability is reduced with every step.
It will readily be realised that such processes are laborious, costly, and require costly investments.

Method used

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  • Method for Producing a Gun Cartridge Casing
  • Method for Producing a Gun Cartridge Casing

Examples

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Embodiment Construction

[0050]According to the present invention, the metal sheet, which is preferably a brass sheet, is fed directly into a deep drawing transfer press. Preferably a zig-zag feeder for providing a multiple cut is used to feed the material to the cutting tool which cuts discs out of sheet metal. A zig-zag feeder will utilize the material in a most efficient manner without needless waste of material.

[0051]Thereafter, a cup is formed in the transfer press, and the cup is transferred to subsequent stations of the transfer press, preferably without any intermediate washing, pickling and / or bondering. During various forming steps, the wall thickness of the case is reduced to a final wall thickness.

[0052]To allow the further deep drawing and ironing operations without any annealing process to the final wall thickness, a reduction of the true strain of per operation is required. Preferably, according to the process of the present invention, the number of forming stations (pairs of punches and dies...

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Abstract

The present invention relates to a novel method for producing a gun cartridge casing in a single multiple station deep drawing transfer press.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a novel method for producing a gun cartridge casing.BACKGROUND OF THE INVENTION[0002]Typically gun cartridge cases are drawn from sheet metal discs in three ‘stages’. First a cup is formed from the sheet metal disc. Thereafter the cup is drawn to the desired length by a number of forming operations through punches of decreasing diameters until a suitable length of the part is attained. The drawn part is then provided with a neck, if necessary. Finally, the bottom of the drawn and necked part is provided with a groove to form the final cartridge case.[0003]After each drawing stage the parts are annealed, pickled, rinsed and subjected to further quality improvement measures.[0004]For the annealing process the part should be clean, which requires a washing before the annealing. After the annealing the part is pickled, bondered and / or lubricated, which is required for the following drawing operations.[0005]Depending on the cal...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B21D51/54B21D24/00B21D28/02B21D22/28
CPCB21K21/04B21D22/26B21D51/54B21D28/02B21D22/28B21D24/005F42B5/28
Inventor NEUGEBAUER, HANS-JURGEN
Owner NEUGEBAUER HANS JURGEN