Method and apparatus for producing riflings in barrels of guns
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United States of America Patent
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Nov 23, 2021
Grant Date -
May 23, 2019
app pub date -
Jun 9, 2017
filing date -
Jun 9, 2016
priority date (Note) -
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Abstract
Methods and apparatuses are described herein for producing a rifling in a barrel of a gun. The barrel defines an axis in a longitudinal direction and comprises an inner wall that defines a bore extending in the longitudinal direction. A tool includes a tool head having an outer contour that corresponds to a shape of the rifling to be produced. The tool head consists of an electrically conductive material. The outer contour of the tool head and the inner wall of the barrel define a gap. An electrolyte solution is pumped through the gap while the tool is guided through the bore, and a pulsed electrical voltage is applied to the barrel and the tool. The barrel is the anode and the tool head is the cathode. The tool is moved through the bore and rotated about the longitudinal axis while the pulsed voltage is applied to produce the riflings.
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