Cutting by use of rotating axially moving tool – Machine including plural tools – Coaxial tools
Patent
1991-03-01
1992-05-26
Bishop, Steven C.
Cutting by use of rotating axially moving tool
Machine including plural tools
Coaxial tools
408 37, 408 40, 408234, B23B 3922
Patent
active
051161699
ABSTRACT:
An apparatus and method are provided for drilling thin-walled glass articles. The apparatus is comprised of a drilling machine having upper and lower triangulated arm assemblies to which opposing drills are attached. The arm assemblies pivot about a common shaft. The shaft is supported by a support assembly attached to a sliding table. First and second actuators mounted on the support assembly urge the arm assemblies to pivot about the shaft, thereby controlling the feed rate and stroke of the drills. In a second embodiment adapted to drill deep glass articles, the lower arm assembly has an intermediate frame which pivots about an upper shaft along with the upper arm assembly. The lower arm assembly also has a lower arm which pivots about a lower shaft under the urging of a third actuator, allowing the drill spindle attached to the lower arm to enter and withdraw from the deep article without scratching the sides of the article.
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ABB Power T&D Company Inc.
Bishop Steven C.
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