Cutting by use of rotating axially moving tool – Processes – Bit detachable
Patent
1992-12-23
1994-04-05
Bishop, Steven C.
Cutting by use of rotating axially moving tool
Processes
Bit detachable
408 61, 408 67, 408 72R, 408 97, 901 41, B23B 3500
Patent
active
052998940
ABSTRACT:
An end effector adapted for attachment to and accurate positioning by a robot is provided for positioning a channel-shaped workpiece at a desired position and drilling an accurately located positioning hole in the workpiece. The end effector includes a conventional speeder unit with a Morris taper that can be grasped by the robot and rotated for transfer of torque to the speeder unit. A top plate is attached to the speeder unit and has a central opening to receive a drill collet extending downward from said speeder unit for drilling the holes in the workpiece. A base plate is connected to the top plate by guide rods which are pressed into bores in the base plate and extend through linear bearings in the top plate for self-parallel movement relative to the top plate. A pair of nuts mounted on the top plate is threadedly engaged with a pair of lead screws connected to the base plate so that vertical movement of the base plate will push the lead screws through the nuts and rotate the lead screws. A pinnion is coupled to each of the lead screws and engaged with a sector gear mounted on a pair of paddle shafts supported in bearings in the base plate. A cam roller assembly is connected to the lower end of each paddle shaft and is rotated by the pinnion and sector gears when the robot presses the end effector into the channel of the workpiece so the top plate moves downward toward the base plate, causing the lead screws to move vertically in and rotate in the nuts. The rotating cam roller assemblies engage the sides of the channel in the workpiece and move it to the desired position centered under the axis of the end effector, whereupon the drill drills the hole at the precisely predetermined position.
REFERENCES:
patent: 1296470 (1919-03-01), Bovard
patent: 2592432 (1952-04-01), Kline et al.
patent: 3154338 (1964-10-01), Leach
patent: 4598453 (1986-07-01), Wills
patent: 4613262 (1986-09-01), Woods
patent: 4858334 (1989-08-01), Heitzmann
patent: 5127139 (1992-07-01), McCowin et al.
patent: 5203855 (1993-04-01), Givler et al.
Bishop Steven C.
Donahue B. A.
Neary J. Michael
The Boeing Company
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