Metal working – Method of mechanical manufacture – Structural member making
Patent
1993-08-16
1995-04-11
Rosenbaum, Mark
Metal working
Method of mechanical manufacture
Structural member making
29407, 29458, 29464, 295252, 408 1R, 408 13, 408 87, B23Q 1700
Patent
active
054046416
ABSTRACT:
A system is provided for drilling through contiguous first and second plate members so as to avoid the formation of burrs at their interface. Using a jig, the plate members are held together at distant locations while assuming a desired mutual orientation in a longitudinally extending upright plane. Loosely suspended from a frame manually movable along the length of the jig, a horseshoe shaped yoke is positioned in a laterally extending upright plane and has a pair of depending legs straddling and adjacent to their associated plate members to be drilled. A hole finding pin on a first leg is manually inserted into a pilot bore provided in the first plate member. Thereupon, opposed clamps on the depending legs firmly engage the plate members in the region of the pilot bore. From the side of the second plate member, enlarged sized bores are drilled through the plate members axially aligned with the pilot bore. The drill is mounted on a second leg of the yoke with an operating axis aligned with the hole finding pin. Sensors on the second leg are engageable with the second plate member for determining the orientation of the drill's operating axis. An attitude drive mechanism on the frame is responsive to the sensors for adjusting the position of the yoke relative to the plate members and permits drilling to occur only when the operating axis of the drill is substantially perpendicular to the second plate member at the location of intended engagement therewith.
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Bratten James M.
Howard Stephen F.
Avco Corporation
Bryant David P.
Rosenbaum Mark
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