Propellant grain machining device and method

Details Propellant grain machining device and method Propellant grain machining device and method

1995-02-14

1996-04-30

Howell, Daniel W.

Gear cutting, milling, or planing

Milling

Means for internal milling

212348, 254102, 409199, B23C 300

Patent

active

055119140

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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