Propellant grain machining device

Details Propellant grain machining device Propellant grain machining device

1992-04-21

1995-02-21

Miller, Edward A.

Gear cutting, milling, or planing

Milling

With means to remove chip

409143, 409199, 409203, 407 31, 407 55, B23C 334

Patent

active

053910257

ABSTRACT:
An apparatus for cutting a path of propellant grain away from a solid rocket motor. The apparatus includes a telescoping arm connected to a rotatable body. A cutting tool having a primary and secondary cutter is connected to a distal end of the telescoping arm. The secondary cutter is disposed adjacent the primary cutter and configured to make cuts through the portion of propellant grain along the path such that the grain is cut away from the rocket motor in a plurality of pieces. The telescoping arm includes a plurality of interconnected extendable concentric cylinders configured with a plurality of ball/spring detents each bearing a resistance load for restraining one of the concentric cylinders such that the innermost unextended of said concentric cylinders extends prior to the extension of any other of said unextended concentric cylinders.

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