Cutting by use of rotating axially moving tool – Machine including plural tools – Axes of tools moving with work during operation
Patent
1989-06-14
1990-02-06
Howell, Daniel
Cutting by use of rotating axially moving tool
Machine including plural tools
Axes of tools moving with work during operation
408 34, 408 35, 408 49, 408 55, 408 67, B23B 3920, B23B 4100
Patent
active
048985015
ABSTRACT:
A rotary drilling machine for forming holes of selected size and spacing in continuous strip material such as elastomeric gasket stock used for the manufacture of gaskets for door openings and the like. This machine has a rotary drum unit which carries the strip material along a portion of its peripheral edges. A plurality of drilling units are mounted on this drum unit so as to move with the strip material. The drilling units are oriented toward the peripheral edge, and these drilling units are moved radially in a proper sequence whereby drill bits thereof move toward the strip material to dril the holes and then retract. Tensioning elements produce friction between the strip material and the periphery of the drum unit to accomplish the movement thereof in unison. The tensioning elements, in a preferred form, have signal generating elements whereby the speed of rotation of the drum unit is controlled to prevent sag in the run of the strip material. The radial movement of the drilling units is preferably controlled with a cam and cam follower arrangement. Air for driving driling motors and water for cooling the drill bits is fed to the machine through passageways in the drive shaft for the drum unit. The construction of this machine provides for very accurate drilling of the holes, and a high rate of production with very little maintenance.
REFERENCES:
patent: 984792 (1911-02-01), Beehler
patent: 1044564 (1912-11-01), Orth
patent: 1101879 (1914-06-01), Orth
patent: 3877831 (1975-04-01), Maroschak
patent: 3910713 (1975-10-01), Maroschak
patent: 4219293 (1980-08-01), Licht
Howell Daniel
Tennessee Tool and Engineering, Inc.
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