Cutting by use of rotating axially moving tool – Machine including plural tools – Coaxial tools
Patent
1990-06-13
1991-07-02
Schwartz, Larry I.
Cutting by use of rotating axially moving tool
Machine including plural tools
Coaxial tools
408 46, 408 59, 408 12, 408 15, 408 17, 125 20, 51 80R, 51283R, B23B 3922
Patent
active
050281763
ABSTRACT:
A glass drilling machine for drilling holes in a sheet of glass in which each hole is partly drilled from one side of the sheet and is then finish drilled from the opposite side. The machine is made up of aligned first and second drilling devices which are attached near the ends of first and second pivotable arms, respectively, the first and second arms being periodically pivoted toward and away from the sheet to bring the drilling devices into and out of drilling engagement with the sheet. The first and second arms are releasably clamped to first and second spindles, respectively, which pivot about first and second axes, respectively, the first and second axes being spaced apart but close to one another and positioned remote from the drilling devices. The position of the first arm is adjustable along its longitudinal axis and the position of the second arm is adjustable along the axis of the second spindle. A cooling fluid is circulated through the drilling devices against the sheet, and a pressure sensor is provided to sense cooling fluid back pressure, which will fall suddenly and appreciably at the conclusion of a drilling cycle if a slug drops from the sheet, to control the operation of the machine and thereby ensure the completion of the drilling cycle.
REFERENCES:
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patent: 3973858 (1976-08-01), Poisson et al.
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patent: 4573835 (1986-03-01), Eckardt et al.
patent: 4730420 (1988-03-01), Stratmann et al.
patent: 4867618 (1989-09-01), Brohammer
Delventhal Kent A.
Grosjean Kenith E.
Brinks Willian
Meehan Thomas A.
Schultz Robert
Schwartz Larry I.
Toledo Automated Concepts, Inc.
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