Improvement in worktable apparatus having X and Y drive units for producing relative table-to-tool movements along perpendicular X and Y axes, respectively; the improvement consisting of indexing and cycling mechanisms for controlling table-to-tool movement and cycling of a tool unit, comprising a template having at least one physical characteristic varying along both the axes in accordance with the desired pattern of the movement and the cycling; first and second sensors, the template and the sensors being mounted to undergo relative sensor-to-template movement in correspondence to the relative table-to-tool movement, the first sensor being responsive to a physical characteristic to provide table stop signals, the second sensor being responsive to a physical characteristic to provide table direction signals, one of the sensors being responsive to a physical characteristic to provide work cycle signals; and logic circuitry responsive to the sensors to cause the drive units to stop the relative movements in response to a table stop signal, to cause the tool unit to carry out the work cycle in response to a work cycle signal, and to cause the drive units to renew the relative movements in accordance with the table direction signals or hold the stop position in the absence of table direction signals.
To align an aperture (16) in a nut (12) with a hole (18) in a threaded stud (14), the nut (12) is rotated on the stud (14) to move the aperture (16) over the hole (18). Light is projected into the aperture (16) as the aperture (16) approaches the hole (18). The light is sensed when it projects from the aperture (16) through the hole (18) upon movement of the aperture (16) into alignment with the hole (18). Rotation of the nut (12) is stopped in response to sensing of the light.
A hole making position control unit for a hole making machine suitable for making rivet holes and bolt holes in shaped steel. This control unit mainly comprises a marked plate having marks thereon, a photoelectrical apparatus for detecting the mark and a hole making head interlocked with the photoelectrical apparatus, and controls the action of the hole making head in accordance with the arrangement of the marks, which are arranged at the positions corresponding to the centers of holes to be made and to the turning positions of the moving direction of the hole making head. Each mark has a width to be detected in the detecting direction of the photoelectrical apparatus, so that during the detection of the mark the hole making head is instructed to decelerate, and when the detection is finished the hole making head is instructed to stop.
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.
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.
