DEVICE FOR MACHINING WORKPIECES

1 . A device for machining workpieces, preferably provided for use with a handling system, consisting of at least one rotary drive unit ( 26 ), which is guided in a device housing ( 2 ) in a longitudinally movable manner and which rotatably drives a cutting tool ( 100 ), and having a feed drive unit ( 32 , 60 ), which moves the rotary drive unit ( 26 ) from a rear non-working position into a front working position and vice versa.

2 . The device according to claim 1 , characterized in that the rotary drive unit has a motor housing ( 26 ), which, guided in a longitudinally movable manner in the device housing ( 2 ) via a guide device ( 24 ), is coupled to the feed drive unit ( 32 , 60 ) at its end facing the latter and is passed through at least at its other opposite end by a drive shaft ( 28 ), on which the machining tool ( 100 ) can be fixed.

3 . The device according to claim 1 , characterized in that the feed drive unit has a control chamber ( 60 ), in which a control piston ( 62 ) is pneumatically guided in a movable manner from the non-working position to the working position against the force of an energy storage ( 84 ) and is attached to a control rod ( 32 ) of the feed unit ( 32 , 60 ), the free end of which acts on the motor housing ( 26 ) of the rotary drive unit.

4 . The device according to claim 1 , characterized in that the rotary drive unit ( 26 ) has a pneumatic motor, the operating medium, air, of which is supplied via the control rod ( 32 ).

5 . The device according to claim 1 , characterized in that buffer devices ( 86 ) are provided in the control chamber ( 60 ), which are used as stops for the control piston ( 62 ) in its end positions.

6 . The device according to claim 1 , characterized in that the other free end of the control rod ( 32 ) extends out of the device housing ( 2 ) and contacts a damper device ( 96 ), which preferably acts on the control rod ( 32 ) in both opposite directions of travel.

7 . The device according to claim 1 , characterized in that a sensor device ( 90 , 92 ) is used to monitor the position of the other free end of the control rod ( 32 ).

8 . The device according to claim 1 , characterized in that the other free end of the control rod ( 32 ) is connected to a control plate ( 90 ), on which the damper device ( 96 ) acts, and in that at least one of the end positions of the control plate ( 90 ) is monitored by means of the sensor device ( 92 ).

9 . The device according to claim 1 , characterized in that the control rod ( 32 ) for guiding the pneumatic medium of the pneumatic motor is hollow and is permanently connected via a transverse connection ( 50 ) to an annular chamber ( 44 ) in the device housing ( 2 ), wherein said annular chamber ( 44 ) in turn is connected to a compressed air supply line ( 40 ) in the device housing ( 2 ), and in that the overall length of the annular chamber ( 44 ) in any travel position of the control rod ( 32 ) permits at least a partial overlap with the transverse connection ( 50 ).

10 . The device according to claim 1 , characterized in that a drill chuck ( 30 ) is arranged at the free end of the drive shaft ( 28 ), wherein said drill chuck ( 30 ) is used to hold a drill ( 100 ) as a cutting tool.

11 . The device according to claim 1 , characterized in that at its free end, the drill ( 100 ) passes through a guide device ( 18 ), which, guided past the outer circumference of the drill chuck ( 30 ), has at its free end a centering aid ( 102 , 106 ), which is used to guide the drill ( 100 ) during machining.