Apparatus for perforating a workpiece

Cutting by use of rotating axially moving tool – With control means energized in response to activator... – To control relative positioning of tool and work

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408 12, 408 53, 83368, 83370, B23B 3908, B23B 4900

Patent

active

044076142

ABSTRACT:
A workpiece such as a steel profile to be perforated at predetermined distances from a longitudinal reference surface thereof is moved past a plurality of perforating tools, such as punching or drill presses, mounted on a main slide and associated with respective sensors carried on an ancillary slide, the two slides being provided with a rack-and-pinion coupling working into a position detector. Each sensor comprises two sensing heads movable, upon selective activation prior to operation of the corresponding tool, transversely to the workpiece path with a slight relative offset; the ancillary slide is displaced until the reference surface is detected by one--but not both--sensing heads whereupon a corrective motion is imparted to the main slide under the control of the position detector.

REFERENCES:
patent: 3785235 (1974-01-01), Peddinghaus et al.
patent: 3803961 (1974-04-01), Valente
patent: 3817135 (1974-06-01), Valente
patent: 3892154 (1975-07-01), Duffy
patent: 3919071 (1975-11-01), Kindgren
patent: 4040320 (1977-08-01), Cloud
patent: 4061064 (1977-12-01), Kindgren et al.
patent: 4268195 (1981-05-01), Regenbrecht

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